Case Studies

Delivering resilient stormwater storage through innovation and collaboration, strengthening environmental protection and reducing pollution risk

First-time sewerage scheme for isolated, rural properties near Barnsley, replaces failing septic tanks with a permanent, sustainable wastewater solution

£52m investment unlocks groundwater capacity, boosts strategic storage & strengthens water supply resilience throughout north Suffolk

Innovative design & complex lifting enable a penstock replacement project 38m below ground to transform operation, access, safety & reliability

Demonstrating the value of early contractor involvement, integrated design & build engineering and collaborative delivery

Investing in storm storage and phosphorus removal upgrades to provide long-term improvements and resilience in wastewater processing

Design and build of a surface water sewer using innovative tunnelling techniques to reduce sewage spills to the environment

Providing the increased treatment capacity and operational flexibility required to accommodate future growth and tourist-season peaks in the Cotswolds

Innovative design and construction solutions to deliver increased treatment capacity, meet tighter phosphorus permits, and enhance storm resilience

Removal of existing pipe bridge and replacement with inverted syphon under the River Calder

Supporting future water demand in Kent through the construction of a new water treatment facility

Meeting PR24 requirements with innovative storm storage infrastructure that strengthens performance, resilience and environmental outcomes

Targeted process and infrastructure upgrades to achieve tightened phosphorus consent & improve operational resilience at a rural wastewater treatment works

Delivering resilient, low-carbon wastewater infrastructure in an environmentally sensitive catchment

A series of projects to alleviate drought issues associated with the raw water supply from the Backwater and Lintrathen Reservoirs to Dundee and surrounding area

Measures in the interests of safety for innovative reservoir flood prevention and improved access to preserve a crucial water resource for Elgin

Modular ceramic membrane upgrade to increase capacity and meet future demand through sustainable off-site construction and innovative technology

Upgrade of a live wastewater treatment plant in County Meath incorporating sludge drying reed beds as a low-energy sludge management solution

Anglian Water’s first integrated constructed treatment wetland will ensure compliance with the new EPR phosphorus and iron consent limits

Delivering a robust and environmentally sensitive solution to storm overflow management at a rural treatment works located within a protected landscape

Improving treatment capacity, environmental performance & operational resilience through collaborative design & innovative construction

Enhancing river quality in St Helens through innovative wastewater screening & storage

Delivering long-term water resilience through the innovative reuse of England’s historic canal network

Delivering storm storage upgrades for Northumbrian Water through adaptive design and collaborative construction

Delivering innovative civil engineering solutions, precast construction, & complex network connections while maintaining uninterrupted wastewater operations

Delivering increased stormwater resilience for a rural wastewater treatment works serving a growing catchment

Nature-based solution to achieve phosphorus compliance without compromising aluminium limits by reducing chemical dependence

A constrained urban CSO upgrade delivering additional storage, reduced spills, improved resilience & lower carbon through optimised, digitally enabled shaft design

Enhanced nature-based treatment to improve water quality and support a healthier river environment using integrated constructed wetlands

Optimising treatment processes to lower the phosphorus concentrations in the final effluent without exceeding a total iron concentration

Addressing the UK’s first inland bathing water designation with storm storage, increased FFT, secondary aerated reed bed treatment & tertiary integrated constructed wetland treatment

Modernising wastewater infrastructure for environmental protection & regulatory compliance, enhanced network resilience, & future capacity provision

Scaling a proven ceramic membrane solution to deliver resilient, high-quality drinking water through modern modular construction

Phosphorus removal and ammonia compliance upgrade for river water quality and environmental improvements

Large-scale Mecana plant to manage raw water quality & algal risk, protect downstream treatment performance and lower chemical usage

Meeting a tightened ammonia permit level to reduce the risk of eutrophication & algal blooms and help protect wildlife in the receiving watercourse

Effective early contractor involvement identifies risks and opportunities to deliver efficiently for Severn Trent

Fast-tracked deployment of a modular m-MBBR^® treatment solution to support Scottish Water’s bathing water quality objectives

Delivering a reinforced potable water network that meets the needs of both existing residents and the growing number of new homes in the area

Saline smoothing plant limits the rate of change of salinity of the incoming flows & reduces spills from the existing emergency overflow

A new reservoir, conditioning plant and associated low-carbon pipework to ensure resilience of supply without stressing local water sources

Installation of a 23.6km water main ensures resilience of supply for customers between Peterhead & Ellon and allow future growth in the Ellon corridor

Enhancing wastewater treatment performance to achieve regulatory compliance while supporting population growth

Complex trunk main diversions and hydraulic-led design clear the way for Lincolnshire’s North Hykeham Relief Road infrastructure scheme

Innovative trenchless relining technology transforms a failure-prone rising main into a resilient, future-ready asset, minimising disruption to the community

Nitrogen removal trial designed to provide the evidence required to shape future nutrient management strategies across the sector

The installation of a new reinforcement main, upgraded pressure management systems and improved network flexibility to resolve peak‑demand issues

Delivering climate-resilient habitat creation & land drainage infrastructure through innovative design, hydraulic modelling & engineering

River Tyne eel screen installation ensures that the raw water abstraction station complies with The Eels (England and Wales) Regulations 2009

Improving site resilience during wet weather events, reducing environmental risk, and providing a robust platform for future enhancements

Optimising treatment processes to lower the phosphorus concentrations in the final effluent without exceeding a total Iron concentration

A pioneering nature-based approach to storm overflow management, delivering improved river health and socio-environmental benefits to local community

Delivering 1,324m³ of additional storm storage capacity to improve resilience, environmental performance and regulatory compliance in Bedfordshire

Water Retaining Structures Framework: delivery of low-carbon precast potable water storage infrastructure, improving network resilience for Affinity Water

Dual-scheme solution to increase stormwater storage by over 250% and increase FFT to meet population growth & environmental obligations

A combined ammonia and pesticide removal project that demonstrates an innovative, proactive response to emerging water quality challenges

Anglian Water’s upgrade of a water treatment works to strengthen both primary and final disinfection and meet regulatory requirements

Innovative treatment technologies unlock the full licensed groundwater abstraction capacity, enhancing resilience and safeguarding supplies

Secondary treatment upgrades at Ireland’s largest treatment plant increases capacity & ensures Uisce Éireann is compliant with the UWWTD for nutrient removal

Nature-based solution supports wildlife & delivers sustainable wastewater management, biodiversity net gain, carbon savings & river protection benefits

Oxidation ditch upgrade with vortex aeration delivers capacity increase and operation & maintenance cost savings

Batch level procurement for five phosphorus removal projects in north Nottinghamshire realises cost, programme and carbon savings

Upgrade to improve performance and ensure compliance with evolving standards and enhance water quality in the receiving environment

A project to secure water supply & maintain network pressure in the Arborfield area through the full replacement of a live water booster station at Sindlesham

Replacing a live booster station and reservoir pipework at Bearwood to increase capacity, improve resilience and support growing demand in the Arborfield area

Using digital technologies and innovative solutions to improve design and construction upgrades

Sludge handling & dewatering project addresses sludge quality, equipment reliability, odour control & power resilience, for long‑term improved performance

Diverting flows and increasing stormwater storage in Essex

Strengthening operational flexibility & supporting long-term water resource management in response to changes in demand & resource availability

Increasing stormwater capacity to reduce storm overflow discharges

An upgrade project to increase capacity, enhance resilience, and achieve permit-compliant effluent quality

Innovative I-Phyc biological algae treatment system for phosphorus removal in place of traditional chemical dosing

Delivering a resilient and efficient storm storage solution that significantly reduces storm overflow risk

Repurposing redundant wastewater assets to reduce storm overflow spills, unlock growth, improve safety and deliver major carbon and cost savings

Building resilient wastewater networks for the future through innovative storm storage solutions, operational excellence, and environmental stewardship

Potable water project improves network resilience & long-term maintainability and demonstrates hidden engineering values in disciplined uncertainty management

Increased anaerobic digestion capacity and upgraded thermal hydrolysis plant & biogas infrastructure strengthens performance and operational resilience

Strengthening the site’s ability to meet tighter phosphorus discharge standards, providing a reliable, future-ready treatment solution for the community

Implementation of a strategic and meticulously planned solution to divert eight water mains to enable the construction of a new dual carriageway

Water treatment works upgrade utilising advanced modular ozonated ceramic membrane technology

Anglian Water’s £96m investment across 112 sites to increase capacity and manage stormwater surges during extreme weather events

Anglian Water’s £338m investment across 170 sites throughout AMP7 to mitigate the release of phosphates into the environment

Water resource management plan to help combat the risk of shortages, boosting resilience and securing water supplies across the East of England

Expansion of Wessex Water’s largest water recycling centre to meet the EA’s Water Industry National Environmental Programme (WINEP)

Filter upgrade project: reviews, assessments, upgrading and replacement of operationally critical equipment at a major water treatment plant

Using a combination of retrofitting and new assets to deliver shellfish water quality improvements

Additional sludge storage enhances capacity and efficiency

Reaching an oxidation ditch solution for increased FFT and the introduction of phosphorus, ammonia and iron consents

SuDS project to reduce the volume of water entering the combined sewer system exemplifies excellence in sustainable design and construction

Yorkshire Water embraces new technology, yielding excellent phosphorus removal results

Trialing an environmentally friendly algae-based treatment process to reduce phosphorus levels in the final effluent to below 0.5 mg/l

Existing process enhancement to provide an affordable tightened permit solution

Innovative flood defence: leveraging operational forecasting and digital technology

Achieving the necessary regulatory permits to improve the water quality of the River Calder and Pendle Water through an major integrated catchment solution

Repairs to cracks and joints at a key reservoir to restore structural stability by preventing water infiltration and reducing the risk of leaks or failures

Water zone management to provide security of supply, improve resilience and upgrade of strategic infrastructure across the North-East region of the province

A cost-effective low risk approach to sludge thickening

Improvement works at a busy inner-city CSO to cut sewage spills by 75% and prevent over 2,000m³ of wastewater from discharging into the River Don

Design and construction of an enhanced biological phosphorus removal plant to improve water quality on Afon Gwili

Delivering a first-of-its-kind low-carbon stormwater management solution in Yorkshire

Major upgrade to increase flow to full treatment and future-proof infrastructure to meet both regulatory standards and the evolving needs of customers

Retrofit of SUDs solutions in a residential area of Hull which is susceptible to surface water flooding during storm events

New 45m diameter primary settlement tanks to meet predicted population growth and ferric dosing for phosphorus removal to ensure compliance

Complying with the Eels (England and Wales) Regulations 2009 at the raw water intake for Pitsford WTW

Providing Uiscé Éireann with additional flexibility in addressing water compliance issues and production shortfalls during upgrade works

Innovative engineering and sustainable practices to aid delivery of ceramic membrane plant upgrade

Upgrading wastewater infrastructure to protect water quality and improve environmental resilience in Exmouth and surrounding areas

Delivering resilience through innovation and collaboration

Optimising treatment processes to remove the risk of the formation of increased trihalomethanes and increasing the works output by over 75%

Providing an additional 8000m3 of stormwater storage and storm tank cleaning systems to meet the WINEP flow driver

Replacing an existing 100-year-old brick sewer on Foyle Street with a gravity foul sewer and a separate gravity storm sewer, from Shipquay Street to Water Street

Deployment of ozone wastewater treatment to reduce faecal indicator bacteria and micro-pollutants in final effluent is first of their kind in the UK

Installation of more than 12km of 900mm diameter ductile iron water main & a new pumping station ensures resilience of supply for 1 million customers

Enhancing wastewater treatment efficiency and environmental compliance

Civils work nears completion of the brand new sewage treatment works on regenerated wasteland which will serve a forecasted PE of 125,000

Achieving consent tightening and providing treatment resilience using new activated sludge process with enhanced biological phosphorus removal

£30m investment to increase sewage treatment capacity, protect Bournemouth’s beaches and meet the needs of the expanding population

Five interconnected rows of Weholite pipe designed to capture stormwater before gradually release it back to a pumping station when conditions stabilise

A comprehensive upgrade of water intake, treatment, and distribution to secure long-term supply

Achieving phosphorus reduction and capacity expansion

Working in partnership with Yorkshire Water to deliver market funded gas to grid plants via a novel commercial model

Enhanced biological phosphorus and tertiary solids removal plants achieve tightened WFD consents with reduced energy consumption

Reconnecting rivers: the construction of a dedicated fish and eel pass on the River Blackwater to re-connect river channels

20km pipeline to balance the water levels in both Abberton and Hanningfield Reservoirs and ensure resilience of supply in the Essex Resource Zone

Safeguarding the River Leam with surface water separation, pumped & gravity storage, and network optimisation

Tackling challenges with innovative solutions & proactive adaptability with movement of flows from multiple sewage treatment works & DfMA MBR systems

250,000 litre stormwater storage tank adds extra capacity to the sewer network in Chippenham to reduce flood events and protect the River Avon

Doubling the wastewater treatment capacity and meeting tightened phosphorus & ammonia consents for the Warwick & Leamington Spa catchments

The restoration of operational assets at to improve system reliability and ensure regulatory compliance

Ensuring security of a safe, sustainable supply of water to the Longwood Water Supply Zone

Mechanical belt filtration to increase wastewater treatment capacity and enhance water quality on the River Wye

FBDA aeration plant upgrade works to meet the new WINEP ammonia consent

Severn Trent’s investment in climate resilient infrastructure to divert stormwater from sewers and ease pressure on traditional drainage systems

A strategic investment in the resilience and sustainability of the region’s wastewater infrastructure by meeting the Environment Agency’s approved stormwater storage volumes

Complex network upgrade in busy town centre to increase storage and deliver important environmental improvements

Safe, efficient construction of a new water booster station providing network resilience

Rehabilitation of a deep underground trunk main using innovative lining method

A modern, sustainable upgrade to improve essential wastewater treatment, safeguard coastal water quality standards and support future growth

Sewage treatment works expansion enhances community well-being, improves river health, and delivers sustainable infrastructure for a growing region

Replacement pumping station project to provide improved climate resilience and help protect Britain’s largest wetland, the Norfolk & Suffolk Broads

Supporting the city’s continuing growth and reducing the risk of sewer flooding affecting low-lying areas near the Tay between Muirton and the city centre

Polyfluoroalkyl substances removal & destruction technologies for River Trent drinking water supplies at Witches Oak

UID upgrade project for Scottish Water in a historical fishing village by installing a new CSO chamber and sea outfall

The challenges of repairing a collapsed sewer pipe in Clyde alluvial soils

Enhancing water quality and resilience through strategic investment

Delivering capacity, resilience and sustainability at Ireland’s largest sludge processing facility

Eco-innovation at Cambridge: renewables project to harness the natural warmth of the River Cam by transforming energy to heat college buildings

Enhancing water quality of the River Irwell through innovative wastewater storage at combined sewer overflow sites across Bolton

Reservoir expansion and on-site electro-chlorination plant to enhance storage, resilience, and sustainability for the Greater Dublin Area’s water supply

Flood resilience upgrades to protect assets in the event of a 1-in-30-year storm

Ensuring continuous operation of during periods of unusually low raw water pH following heavy rainfall

Multidisciplinary collaboration & technical excellence underpin the successful delivery of the wastewater flooding defence programme across Scunthorpe

£4.3m treatability improvements project to upgrade existing water treatment processes and fully modernise operations

Critical infrastructure upgrade in an environmentally sensitive location

Scheme solution optioneering, selection and development for potable water trunk mains to support the Water for Life Hampshire programme

Event duration monitoring and flow passed forward upgrades to 97 sites for Southern Water

Rehabilitation project addresses critical operational challenges while minimising environmental and community impacts

Tackling discolouration issues through innovative manganese filtration and process redesign to enhance network water quality

Safeguarding properties and business with sustainable and innovative interventions

Design and installation of the £20m short sea outfall pipeline at Swalecliffe

Transforming a challenging, constrained site into a modern, sustainable treatment facility, safeguarding waterways & enhancing the water quality of Upper Lough Erne

Addressing issues with storage capacity, flow capacity, phosphorus levels & growth requirements, to maintain the high standard that Anglian Water aspire to achieve

Strengthening the resilience of the water supply network for Severn Trent by addressing a critical operational vulnerability with a reliable secondary source

Providing additional stormwater storage and screening to protect against out-of-sewer flooding and enhance water quality in the Comber River

Innovative air pigging technique to clean a 130-year-old pipeline reduces costs, water use, carbon emissions & environmental impacts

Condensed innovated ASP solution for an increased FFT and the introduction of a phosphorus permit and tightening of an existing ammonia consent

Replacement of the backwash system fundamental to the treatment process, delivered through collaborative working with all delivery partners

The challenges of designing and constructing the Witches Oak programme of works on multiple sites to a condensed timescale

Achieving a 90% reduction in FOG levels enhances wastewater management efficiency, reduces environmental risks, and improves network performance

An integrated scheme to better protect 349 homes against the impacts of climate change while unlocking more than 20km of river to migratory fish

A deep pile cloth filter for remote rural treatment works requiring tertiary solids removal where backwash volumes are an issue

Installation of new control system replacing a 30 year-old existing system across four sites located in Argyll

Upgrade of the existing treatment plant to increase treatment capacity

A modern, sustainable wastewater treatment facility designed to meet increasingly stringent consents for discharging into Lough Neagh

A flagship project for sustainable and carbon saving treatment processes setting a precedent for industry-wide innovation and best practices

Ceramic membrane technology and modular build deliveries innovative solution that provides significant benefits and efficiencies

Project in Giffnock to alleviate internal and external sewer flooding by providing extra capacity and reducing pressure on the wastewater network

£35m investment in improving phosphorus removal capabilities and increasing full flow to treatment in north Northamptonshire

Case study 4: Delivering river water quality improvements to Pendle Water and River Calder through an integrated catchment solution

Combining storm separation, attenuation and flood storage reservoir solutions to alleviate flooding in the town

Optimisation of the combined heat and power (CHP) plant performance to increase electrical output at each site by between 2-3 GWh per year

£30m upgrade to enhance water treatment and distribution in Central Borders for improved quality and reliability for local communities

£17m investment project spanning multiple phases to address operational challenges & enhance treatment capacity to maintain regulatory compliance

Installation of new 450mm trunk main to provide an effective and sustainable supply to a population of 17,500 (and increasing) across Derry City

A challenging upgrade on a confined site providing sustainable treatment & environmental improvements to water quality in the Ballinderry River & Lough Neagh

Flood risk reduction and improved fish migration across the River Rother catchment with online flood gates and a bespoke full-channel fish pass

Storing surplus energy from on-site solar panels at one of NI’s largest water treatment plants is a vital step in NI Water’s journey to net zero

The removal of two reservoirs from the Reservoir Act

Improving water quality in County Durham and providing a resilient sewer network to support catchment growth

Ultra-low phosphorus scheme

Embsay Water Treatment Works is a standalone 24 ML/d water treatment works operated by Yorkshire Water (YW) and located in the Yorkshire Dales National Park, providing clean water to over 15,000 people in Skipton and surrounding areas. The existing works comprises of clarifiers, rapid gravity filters and a chlorine contact tank with associated chemical dosing. […]

Fulfilling the Water Industry National Environmental Programme to reduce overall phosphorus in our rivers

Straight Point Long Sea Outfall project to meet the ‘Shellfish Waters No Deterioration’ improvement measures for the Exmouth catchment

Reliable approach for phosphorus removal

WINEP bathing waters project in North Devon to reduce the risk of stormwater overwhelming outlying pumping stations

Delivering the successful design and construction of a large diameter emergency drawdown siphon at one of Yorkshire Water’s largest reservoirs

CIPP relining of 840m of large diameter pipe following a proactive CCTV survey that revealed hydrogen sulphide damage

Helping nature and society thrive through the design of innovative wetlands

The challenges of constructing a new sewage treatment plant on an historical landfill site

Installation of the UK’s first containerised mid-process hydroelectric turbine on a wastewater treatment works

Newly constructed spillway to future-proof a major 18th century reservoir

Providing additional stormwater storage and improved site operation with the construction of a storm tank and installation of enhanced inlet screening

Design and construction of new 2.1 MLD water treatment works, while maintaining operation of adjacent, outdated plant

Design and construction of new ‘online’ pumping station and flood storage aquagreen to improve resilience in the Humber region

Phase 2: The construction and commissioning of a new £10m fish pass on the River Trent at Colwick Country Park in Nottinghamshire

Southern Water’s multi-million pound upgrade to boost the water quality of the River Arun and cater for the significant growth forecast

Part of South West Water’s WaterFit Programme of works that champions the rivers, seas and wider environment of the south-west

Temporary overpumping solution facilitates CIPP re-lining using ultraviolet and water cure techniques

Asset refurbishment to maintain flood resilience, while reducing both the operational carbon footprint and the overall impact of the project upgrade

New £6.5m water storage tank completed on schedule replacing 90 year-old asset

Reed bed and associated feed pumping station solution for nature-based phosphorus removal

New tertiary nitrifying sand filter process stage with additional upgrade works on existing assets to achieve a high quality effluent

Phosphorus removal project that is part of the Environment Agency’s WINEP nationwide programme of continuous improvement of waterways

Grade II listed structure that underwent refurbishment to address safety concerns in the draw-off tower and spillway

A testament to engineering prowess and safety excellence

Tertiary treatment upgrades implemented to achieve tightened phosphorus and ammonia consents

Successful delivery of a £1.8m wastewater pumping station in the Greenisland Drainage Catchment to improve water quality in Belfast Lough

Construction of United Utilities first innovative MOB^TM treatment process, to improve the water quality in the River Bollin by December 2024

Flood alleviation measures provided in Edinburgh to combat internal and external flooding in Marchmont Road and Marchmont Crescent

Construction of a new EBPR process stream operating in a UCT configuration and updating existing assets to improve the quality of the effluent

Gas-to-grid project helping Thames Water continue with its push towards net zero

UK’s first large-scale installation of MABR technology to enhance ammonia removal

Design and construction of a new run to waste system and attenuation lagoon to protect water quality

Improving sustainability & resilience of sewage treatment in the Erewash Valley

Replacement of non-compliant intake screens with new complaint Intralox eel screens including the associated infrastructure & MEICA work

The provision of 30m3 of offline stormwater storage in Honiton, Devon

Design and construction of modern sewage treatment facility to meet future population growth

Innovative restoration of a historic breakwater, better protecting a community, enhancing amenity and biodiversity while unlocking regional regeneration

Update on construction of a large diameter strategic water main including a challenging crossing of the River Tees

Replacement of existing inlet works with new DfMA structure

Successful delivery of a £7m project to reduce risk of out-of-sewer flooding, capitalising on the benefits of collaboration through NEC4 Option C Contract

The Red Doles Combined Sewer Overflow (CSO) neighbours the Huddersfield Broad Canal and a Network Rail bridge. The CSO serves a catchment covering approximately 3.8km2, predominantly consisting of residential properties and accommodating around 8512 people. The majority of the Fartown area of Huddersfield drainage operates as a combined system, with Red Doles receiving flows from […]

Wastewater treatment upgrades for eutrophication mitigation and environmental compliance to remove phosphorus from the River Wye

Re-lining over a kilometre of existing pipe to upgrade an important sewage pipeline serving an Ayrshire beauty spot

An opportunity for the water industry to expand and improve water and wastewater treatment at low additional cost and carbon footprint

Utilising micro-organisms to break down, digest and clean wastewater, this nature-based reed bed solution reduces the need for chemical dosing

Enhancing South West Water’s visibility of consented spill events from their sewage network across Devon and Cornwall

An £85m scheme that applied innovative modelling to optimise storm volumes and adopted the new approach to final effluent disinfection

Breaking the reactive cycle to move towards a proactive future

Design and construction of a 43 ML semi-precast concrete reservoir to provide resilience in South Tyneside and Wearside

Installation of new 315mm trunk main to provide an effective and sustainable alternative water supply to Randalstown and Antrim

Clean water infrastructure pipe spray lining

A novel water treatment plant constructed on the site of an upgraded reservoir to aid Affinity Water’s environmental sustainability commitments

The UK’s first treatment plant built for a housing developer specifically to meet Nutrient Neutrality requirements

Delivery of complex civils to intercept combined sewer overflows and divert into the Thames Tideway Tunnel

Refurbishment of a 90-year-old potable water storage tank in Bedfordshire without compromising water quality

Design & construction of the repairs to the lower part of the spillway, abandoned siphon recommissioning and the infill of a tunnel

leveraging current digital technology to enhance both the design and construction phases of Northumbrian Water’s upgrade of Wark STW

Removing manganese and iron through the first UK water industry application of jet mixing for coagulant mixing at a water treatment works

West Hallington Reservoir is a Northumbrian Water Group (NWG) asset situated 1km to the northeast of the village of Colwell in the Tynedale district of Northumberland. The reservoir was constructed between 1884 and 1890 for Newcastle & Gateshead Water Company for the purpose of municipal water supply. The reservoir was built adjacent to the earlier […]

Nature-based solution trial for phosphorus removal in Honiton, Devon

Severn Trent’s Green Recovery Programme: combining natural solutions with conventional infrastructure

The challenges of designing and constructing the Witches Oak programme of works on multiple sites to a condensed timescale

Reliable approach for phosphorus removal

Batched P removal portfolio to help achieve WINEP compliance

In 2015, Bournemouth Water was acquired by Pennon Group, who already owned South West Water (SWW). Alderney WTW, located in the north of Bournemouth, is a strategically important water treatment works that supply high quality drinking water to approximately 375,000 customers – nearly 75% of the homes and businesses in Bournemouth Water’s operational area. Alderney […]

Anglian Water’s Strategic Pipeline Alliance (SPA) is delivering one of the largest infrastructure projects in AMP7; a new water main network, hundreds of kilometres long, which will allow Anglian Water to move water around the region from areas of surplus to areas of deficit, future-proofing supply to customers. The network is being constructed in 11 […]

An integral part of NI Water’s £18m Ards North Wastewater Improvement Project to improve the quality of bathing waters in this scenic part of the Ards Peninsula

The Ards Peninsula is a scenic area in County Down, situated on the north-east coast of Northern Ireland. It separates Strangford Lough from the north channel of the Irish Sea and its coastal towns and villages are popular with day trippers and caravanners alike. By 2020, the wastewater treatment works serving the villages of Carrowdore […]

September 2022 saw the successful completion of a new kilometre outfall pipeline in Arklow, Ireland. The lack of wastewater treatment facilities in Arklow resulted in untreated wastewater being discharged directly to the Avoca River. The design and construction of a new wastewater treatment plant and long sea outfall was required to improve the water quality […]

The editor and publishers would like to thank Paul McElroy, Civil Contracts Manager, and David McIlwaine, Site Manager, both with GEDA Construction, and Damien McKeown, Senior Project Manager with NI Water for providing the above article for publication.

Beckton Sewage Treatment Works (STW) is the United Kingdom’s largest STW serving a population equivalent of over four million. The AMP7 project is a major £185m investment to increase the site’s treatment capacity for growth, by a population equivalent of 200,000, by extending the existing activated sludge plant (ASP). Beckton STW will receive stormwater from […]

Birds Park Reservoir is no longer used for water supply and is enjoyed by the community for recreation. Constructed around 1850, the dam is an earth embankment, 45m long and 13.8m high, perched above a residential area near Kendal, Cumbria. There are no historical drawings, and limited site investigation data was available but it was […]

Bourn Reservoir is an above-ground reservoir complex located approximately five miles outside Cambridge, England. Only one tank was still operational after the other two were removed from service due to natural degradation. A new tank was required to meet demand from large-scale developments in the supply area. A review was conducted to ascertain the total […]

Dawlish is a traditional seaside town on the south coast of Devon, approximately 12 miles south of Exeter and is a popular holiday and day trip destination. South West Water (SWW) and Galliford Try’s objective was to ensure that the bathing water quality did not deteriorate within the next 20 years by ensuring that there […]

The Burnley integrated catchment scheme is one of United Utilities’ (UU) largest AMP7 projects with a value of £77m. The project is being delivered by UU’s construction delivery partner (CDP) framework by Advance-plus, a joint venture between MWH Treatment, J Murphy & Sons (JMS) and Stantec UK. The project commenced in 2020 and through two […]

Located south of the village of Chilton Foliat and north-west of the town of Hungerford there is an existing sewage treatment works (STW) that serves a population of approximately 400 people. The works discharge into the River Kennet, one of England’s most important chalk streams which is home to an extensive range of rare plants […]

Clough Bottom Impounding Reservoir (IR) is an earth-fill embankment reservoir located on the eastern edge of the West Pennine Moors, around 4km north east of Rawtenstall, Lancashire. The reservoir is currently used for public water supply and compensation flows. The reservoir was formed by the construction of an earth embankment across the Whitewell Brook and […]

Deephams Sewage Treatment Works (STW) is located in Edmonton, North London. In November 2018, Thames Water Utilities Limited (TWUL) issued take-over to the AECOM, Murphy, and Kier (AMK) joint venture for the replacement of the entire sewage treatment stream. The project increased the treatment capacity to 989,000 population equivalent and met the new final effluent […]

NI Water’s Derg Water Treatment Works (WTW) is located in the north-west of Northern Ireland and produces on average 20 Ml/day, supplying water to approximately 10,000 homes to a wide area including Castlederg, Strabane, Omagh and their associated rural areas.  In recent years there have been multiple exceedances of the pesticide, MCPA [(4-Chloro-2-methylphenoxy) acetic acid], […]

Using the MS1800 for the on-line detection of hydrocarbon contamination in a municipal sewerage system

The Don Regulators comprise three strategically important regulator gates on the River Rother that are owned, operated and maintained by the Environment Agency (EA). The purpose of the regulators is to reduce the risk of flooding to settlements within the Don catchment, by attenuating flows in the River Rother. JBA-Bentley, in a joint venture relationship, […]

Newly commissioned treatment centre providing high quality drinking water to 44,500 customers in Somerset

The water network in the western end of the Thames Valley Supply Area is dominated by local borehole water sources. Over time, population growth coupled with general environmental drivers to reduce reliance on groundwater sources in sensitive chalk stream areas, Thames Water has sought to improve supply resilience and deployable output by linking local sources […]

Finham STW, situated near Coventry in the West Midlands, is Severn Trent’s fifth largest wastewater treatment works and treats over 115 megalitres of effluent a day from half a million people. The works processes indigenous sludge on site as well as accepting exports from local, satellite sites, producing final effluent, ‘cake’ and biogas as outputs. […]

A design & build collaboration to develop a Welsh Government funded flood alleviation solution for the village of Glenboi

Goddards Green Wastewater Treatment Works (WwTW) is a Sludge Treatment Centre (STC) located near Burgess Hill in West Sussex. The catchment serves the towns of Burgess Hill, Hassocks, Hurstpierpoint and surrounding villages, providing for 54,789 people. The project implements an innovative approach to mitigate the likely odour from the processes at the WwTW to prevent […]

Guildford Borough Council (GBC) are progressing with the development of approximately 41 hectares of brownfield land located along the west bank of the River Wey as it runs through central Guildford and north through Slyfield Industrial Estate. Guildford Sewage Treatment Works (STW) lies within this land and requires relocation in order to enable the development […]

Hampton Loade WTW treats raw water from Chelmarsh Reservoir, located approximately two miles north-west of the site. The reservoir is supplied by the river intake pumps located within the intake building immediately adjacent to the River Severn. The maximum flow that can gravitate to the works from the reservoir is 130-135 megalitres/day (MLD). To increase […]

Located south of Chelmsford, Hanningfield Water Treatment Works (WTW) is one of the region’s principal treatment facilities operated by Essex & Suffolk Water (ESW). The washwater system is over 50 years old and required upgrading to address long-term performance and resilience requirements. This case study follows on from the paper in 2022 and details the […]

Improving water quality in the River Medlock by installing new powered screens at existing sites in Oldham, Greater Manchester

South West Water’s (SWW) Hingston Down Reservoir site is located on an exposed Cornish hilltop and contains two service reservoirs which supply nearby villages with potable water. Originally there was only one reservoir at the site and there was no way of being able to take it out of service for cleaning, so a Braithwaite […]

Forming part of Southern Water’s (SW) Hampshire supply region, the Isle of Wight (IoW) is located just off the south coast of England and is divided into two water distribution zones (WDZ), namely IoW North and IoW South. The IoW South comprises major towns of Ryde, Sandown, Shanklin and Ventnor with multiple villages and more […]

King George V Reservoir (KGV) is an operational raw water storage reservoir located in the Lea Valley at Walthamstow and is a Site of Special Scientific Interest (SSSI) with restricted access. It is controlled by Thames Water’s Lea Valley/North London Abstraction Group based at Coppermills AWTW. Seepage through the clay core at the north-east of […]

Kinnerley WTW is located in rural Shropshire, approximately 10 miles north-east of Shrewsbury. The site treats around 4 Ml/d from a single groundwater source, after which it is pumped to Pant DSR to supply. The existing water treatment process on site includes two aeration towers, chlorine gas, three iron and manganese pressure filters, a balance […]

Knostrop Sewage Treatment Works (STW) is Yorkshire Water’s largest wastewater treatment site, serving a population equivalent of 990,000 and a full flow to treatment (FFT) of 5600 l/s. The WINEP Programme requires Yorkshire Water (YW) to achieve compliance with the new Total Phosphorus and Total Iron permit levels at 80 wastewater treatment works, including Knostrop. […]

Essex and Suffolk Water, part of Northumbrian Water Ltd, supplies drinking water to 794,000 properties. Maintaining a supply to those customers requires the distribution of up to 670 Ml/d of high-quality drinking water. In Essex, the two primary treatment works are Hanningfield WTW, a physio-chemical works near Chelmsford and Layer WTW, a biological works, near […]

Lee Road Water Treatment Plant (WTP) provides approximately 70% of Cork City’s total treated water supply. Water is taken from the River Lee, treated and then pumped to reservoirs in the north-west of the city through a system of rising mains. Water is distributed to consumers throughout the city via a network of gravity distribution […]

Littlehempston is a large complex potable water treatment works located near Totnes, South Devon, which has multiple river and reservoir sources. It supplies circa 78,000 properties to an area that includes Torbay, Newton Abbot and Kingsbridge. The original treatment works comprises flat bottom clarifiers (FBC) and rapid gravity filters (RGF), with an additional process stream […]

Located near Maerdy in South Wales, Lluest Wen Reservoir is a Category A Large Raised Reservoir as defined by the Reservoirs Act 1975. The reservoir is impounded by a 200m long, 25m high earth embankment dam across the Rhondda Fach River and currently impounds 1.07Mm3 of water. Construction of the reservoir was originally completed in […]

Llyn Bran is located in Denbighshire, north-east Wales and was a natural lake that was raised in 1899 by a concrete dam. The reservoir was used to supply water to the North Wales Hospital in Denbigh. The hospital closed in 1995 and Llyn Bran has not been used for drinking water since. As part of […]

NI Water has undertaken a highly sustainable project which replaces wastewater treatment infrastructure for the catchment of Loughries, a small village close to the shores of Strangford Lough. Due to its age, an increasing load from the village, and ever-tightening discharge limits being applied, the existing works was in danger of breaching consents. The project involved […]

Lower Barden Reservoir is the lower of two reservoirs located near Bolton Abbey within the Yorkshire Dales National Park. The reservoir is an impounding reservoir with a crest length of approximately 640m and a maximum height of 28m with a capacity of 2.23 Mm3. The overflow is located on the right-hand side of the embankment […]

Marhamchurch is a small village around 2.4km south of Bude and has a population of just over 800. Sewage from this village is pumped to a nearby large sewage treatment works which processes the waste from Bude and the surrounding area. The existing Marhamchurch Sewage Pumping Station (SPS) was built around 50 years ago and […]

Budleigh Salterton is a seaside town on the coast in east Devon, at the start of the World Heritage Jurassic Coast, with a population of just over 5,000 people. It has been described as a picturesque town with a two-mile pebble beach for the hardy swimmers braving the seas for a dip in the beautiful […]

Over recent years, Derby’s city centre has suffered historic river and surface water flooding. In partnership with the Environment Agency, Derby City Council sponsored the £8m Mill Fleam Pumping Station project; a key piece of flood defence infrastructure that barriers off and then over-pumps Markeaton Brook when the River Derwent is in flood. In November […]

North-west of Nottingham and separated by the River Erewash, two of Severn Trent’s sewage treatment works are situated within 2.5km of each other; part of the legacy of the times of the public statutory undertakers. Heanor Milnhay STW in Derbyshire has a dual-stream process, with part of the flows going through trickle filters and the […]

During the industrial revolution, pollution and weir constructions in Yorkshire resulted in the rapid decline of river standards and loss of once abundant species such as salmon, trout, and grayling. The rivers were wiped of ecological habitats and the number of species found in the river declined by 83%. In 1999 Yorkshire Water installed the […]

The Rivers Lugg and Wye have been identified as having high levels of phosphorus, which is causing eutrophication of these watercourses. Norton Wastewater Treatment Works (WwTW) discharges treated final effluent to the Norton Brook, a tributary of the River Lugg. Presteigne WwTW discharges treated final effluent directly into the River Lugg downstream of the Norton […]

Northumbrian Water’s Ovingham Raw Water Pumping Station (RWPS) is an abstraction station located on the north bank of the River Tyne in South Northumberland between the towns of Wylam and Ovingham. The station provides raw water from the River Tyne to Horsley Water Treatment Works (WTW) and the Great Southern Reservoir at Whittle Dene WTW. […]

Northern Ireland Water’s Cushendall Water Pumping Station (WPS) is housed on the outer perimeter of Dundonnell Water Treatment Works (WTW) situated on the outskirts of Cargan village in the middle of County Antrim. The WPS solely supplies Parkmore Service Reservoir (SR) with potable drinking water, which in turn gravity feeds three other downstream SRs (Knockans, […]

Potters Way, located in the Fengate area of Peterborough, is a recent housing development next to the A1139. The development was built on the grounds of the former Fengate Water Recycling Centre (WRC) which closed in 1988 following the construction of the Flag Fen WRC. In early December 2018, Anglian Water became aware of the […]

Resource recovery for agricultural fertiliser use, while protecting the water quality in Dublin Bay

The River Lyd Pumping Station is consented to abstract up to 40 Mld from its intake source at Lifton, Devon during November through to March, pumping raw water approximately 7km to Roadford Reservoir. The pumping station was last used on a full operational basis during the mid-1990s and the original equipment had remained in a […]

United Utilities and Managed Service Provider (MSP) Costain have delivered improvements to the existing spillway at Rivington Upper Impounding Reservoir in Lancashire. The team worked collaboratively, undertaking a complex construction programme in challenging conditions, while managing the operational needs of the reservoir site and popular recreational area. The main objective was to upgrade the existing […]

Roundhill Sewage Treatment Works (STW) is a large wastewater treatment site in the Severn Trent region serving Stourbridge and the surrounding area. It treats a flow to full treatment (FFT) of 1781 l/s and a population equivalent (PE) of around 300,000. The works was extensively rebuilt around the year 2000, with the large rectangular biofilters […]

This project was commissioned by UK Water Industry Research (UKWIR), as part of their efforts to address one of the 12 Big Questions the UK Water Industry is facing, “How do we achieve 100% compliance with drinking water standards (at point of use) by 2050?”. Today, no more than 10% of the total incoming flows […]

Reverse Osmosis (RO) will play an essential role in helping the water industry tackle the numerous environmental and sustainability challenges it faces. Global climate change is causing increased stress on water resources around the world, and this means more reliance on desalination of brackish and sea water sources to provide drinking water security. The technology […]

Seedy Mill WTW treats surface water from the Blithfield Reservoir. The existing supply to the works is gravity-fed up to a maximum of 85 MLD. Additional yield could be provided by utilising three in-line booster pumps located at Nethertown. In addition, there are two individual borehole contributions at Seedy Mill and Trent Valley, which can […]

Section 101a of the Water Industry Act requires that sewerage providers deliver and fund first time sewerage (FTS) schemes where the current drainage for two or more properties is unsatisfactory and where a public solution is viable. Unsatisfactory drainage includes situations where environmental or amenity problems caused by uncontrolled discharges from septic tanks or cess […]

To ensure compliance with tighter Environment Agency permits for phosphorus removal, the number of phosphorus reduction schemes have quadrupled since AMP5 and is seen by some as one of the biggest challenges ever to face the water industry. The Water Industry National Environment Programme (WINEP) is a programme of actions that water companies are required […]

St Augustines Road is a busy thoroughfare in Chesterfield linking the town to Matlock and the south-eastern edge of the Peak District. Lying within the Yorkshire Water (YW) waste catchment area, the road is steep in its nature with gradients often exceeding 7%. Due to the local hydraulic catchment and topography, during heavy rainfall events […]

Upgrading the existing water treatment process with GAC and UV treatment to meet long term taste and odour targets

The village of Stratton, which is located just outside Bude, Cornwall, used to have its own sewage treatment works, but this was replaced by a sewage pumping station (SPS) many years ago when it was decided that Bude and the local villages would have all their sewage treated at a single, large treatment works at […]

The Stroud Sewerage Strategy is a major investment by Severn Trent which is required to overhaul of the existing sewer network by installing almost 3.5km of enlarged sewer pipe, separating surface water from the sewage network, creating additional storage with smart controls to hold stormwater back during large storm events before returning it to the […]

With approximately 60km of new 800/900mm pipeline required to replace the existing potable water mains, some of which are over 150 years old, the Tees and Central Strategic Pipeline will directly improve water quality, network resilience and operability within the Tees Network. The pipeline will serve approximately 50,000 properties and link a number of strategic […]

South West Water’s Thankes Park Sewage Pumping Station (SPS) is situated in a housing estate, close to Thankes Lake along the River Tamar in a busy public park with extremely limited access. The park has been undergoing renovation and development by locals who upkeep the maintenance to stimulate interest in its historic and heritage value […]

The Thames Tideway Tunnel Project is a 25 km (16 mi) combined sewer under construction under the tidal section of the River Thames as it runs through London. It will significantly increase the capacity of London’s sewerage system (large sections of which were built in the 19th century), and be able to capture, store and […]

Tophill Low Water Treatment Works (WTW) is a 68 Ml/d water production plant situated in the East Riding of Yorkshire, approximately six miles from Driffield. The works was originally constructed in 1959 and upgraded in the 1990s to the current configuration. The treatment process presently includes pH correction, ozonation, coagulation, DAF clarification, rapid gravity filtration, […]

Ufton Nervet WTW is a groundwater treatment site located in the Kennet Valley Water Resource Zone, to the south of Reading and supplies an ‘island zone’ of approximately 12,000 properties. Groundwater is pumped through pressure filters for iron removal after which chlorine is dosed before flows enter the contact tank, which is a single cell […]

Usk is a large raised reservoir formed by an earth embankment dam, which completed constructed in 1955 with an approximate capacity of 12,268,000m3. The dam is 480m in length, with a maximum height of 31m, and supplies raw water to Bryngwyn Water Treatment Works and as well as providing compensation water to the River Usk, […]

A mine water treatment scheme was implemented at Vivian (Six Bells) by the Coal Authority as an environmental service under its national remediation programme in 2006. Vivian (Six Bells) is located in South Wales, approximately 20km north of Cardiff next to the village of Abertillery. A mine water discharge from the Vivian Shaft was discovered in […]

Warrenpoint is a small town in County Down, situated on the northern shore of Carlingford Lough, approximately 7 miles south-east of Newry. The shared water of Carlingford Lough marks the border between Northern Ireland and Ireland. Due to its scenic beauty and coastal location, Warrenpoint is popular with day trippers and the town can experience […]

The  Wells to Glastonbury Pipeline will ensure that approximately 13,000 customers have resilience of water supply by providing a secondary source and route to Windmill Hill Reservoir for the purposes of maintaining a safe supply of water to Glastonbury and Street in the event that the primary main from Cheddar WTW to Cooks Corner is […]

Whitehall Distribution Service Reservoir (DSR) is located on Stronsay, one of the north isles in Orkney, located 25 miles to the north of the Orkney mainland. The isle is home to 350 residents and is accessible by public ferry and plane. The Stronsay WTW that feeds the DSR is 300m to the south of the […]

Winchburgh is located five miles west of Edinburgh Airport and the existing wastewater treatment works lies to the south-east of the town, approximately 200m from the nearest residential street. The site access road runs adjacent to the main Glasgow to Edinburgh railway line, the top of the embankment being a couple of metres from the […]

In the summer of 2020, the water industry was set a challenge by its regulators to identify ways to support the country’s green economic recovery from Covid-19. Severn Trent responded with a number of proposed programmes, including Decarbonising Water Resources (DWR), the subject of this paper. The objective of the DWR programme was to provide […]

Wooler Water Treatment Works (WTW) is fed by four boreholes and supplies up to 160m3/hour of potable water to Wooler and surrounding areas, including several tourist and semi-residential holiday parks serving over 5,000 people. Seasonal fluctuation in demand can increase turbidity and increase iron and manganese concentrations in the borehole water, particularly when flows are […]

The future of smart water: optimising data using a single, integrated software and analytics platform that enables utilities to maximise existing investments, operate more efficiently, and provide affordable and reliable service to their communities

The Alston Spade Mill Pipeline project forms a key part of the United Utilities AMP7 programme and will ensure that the currently untapped resource at four local reservoirs in Lancashire is utilised and will boost the available water in the network without having an additional impact on the environment. Currently the four reservoirs have been […]

While the east of England is attracting people like no other part of the UK, it is also the driest area of the country – a threat to its success that Anglian Water is determined to overcome. The Strategic Pipeline Alliance (SPA) comprises, Farrans, Mott MacDonald Bentley, Costain and Jacobs, who are delivering one of […]

Increasing the environmental credentials through effective wastewater treatment prior to its discharge into nearby natural environments

United Utilities, through two major capital projects, is investing over £25m at Audley and Alsager Wastewater Treatment Works (WwTWs), between 2020 and 2025. This is to meet new regulatory permits under the Environment Agency’s Water Industry National Environment Programme (WINEP). Audley and Alsager WwTWs are located in East Cheshire and serve a population of 9,000 […]

Built in the 1970s, Ballykelly WwTW was designed to serve a population of just under 8,000. However, the closure of the nearby army barracks in 2008 meant the population was halved to around 3,600, leaving the works both biologically and hydraulically oversized. A hybrid solution, comprising conventional and natural wastewater treatment processes, was designed for […]

Situated close to the shores of Belfast Lough, Belfast Wastewater Treatment Works (WwTW) is Northern Ireland’s largest wastewater treatment plant, serving most of the City of Belfast. It occupies a large 45-acre site within Duncrue Industrial Estate and was designed to treat a domestic and trade population equivalent (PE) of 290,000 with discharge into Inner […]

In recent years the Oxfordshire town of Bicester had undergone significant growth in its population with a further potential growth of 37% in the near future. In late 2019, Thames Water implemented the need for a growth scheme to upgrade various elements of the works to accommodate the forecast population increase. Bicester STW is a […]

Both Blackburn WwTW and Darwen WwTW discharge final and storm effluent to watercourses that are tributaries of the River Darwen, feeding into the River Ribble estuary and the bathing waters of the Fylde coast in the Irish Sea. At Blackburn WwTW, which provides treatment for a population equivalent (PE) of approximately 400,000, construction of the […]

The Burnley Integrated Catchment Scheme is one of United Utilities largest AMP7 projects with a value of over £60m which commenced in 2020. The project is being delivered by Advance-plus, a joint venture between MWH Treatment, J Murphy & Sons and Stantec UK; United Utilities’ framework construction delivery partner (CDP). In UK Water Projects 2021 […]

Improving phosphorus performance and providing treatment resilience using preliminary and primary treatment for an existing MBR on a space constrained site

Enhanced river quality by utilising CoMag® ballasted enhanced settlement technology to remove phosphorus

Cardiff Western District Sewage Pumping Station (CWD SPS) receives sewage from the western area of Cardiff for onward pumping to Cog Moors WwTW via twin rising mains. The pumping station is a strategic asset and is operationally critical to Welsh Water. Failure of this asset would have severe business impacts. During AMP6, a root cause […]

Carlisle WwTW lies within United Utilities’ north Cumbria region. The site is located to the north-west of Carlisle’s city centre, on the banks of the River Eden, and serves the city of Carlisle. The treatment works receives domestic sewage, trade flows, and tankered imports, providing primary and secondary treatment prior to discharge to the River […]

Wessex Water were served under S98 of the Water Industry Act to provide an offsite foul water connection for St Modwen’s new Chippenham Gateway development. This commercial development consists of one million square feet of commercial development and potentially a 150-room hotel. An initial modelling appraisal identified insufficient capacity in the local public sewerage network […]

Clifton Wetlands is a new, integrated constructed wetland (ICW) built at Yorkshire Water’s Clifton Wastewater Treatment Works (WwTW), near Doncaster in South Yorkshire. It is a ground-breaking project that utilises a nature based solution to replace conventional wastewater treatment processes with a natural, sustainable and low-carbon alternative. Yorkshire Water, the Environment Agency, Stantec UK and […]

Dean Clough Lower Impounding Reservoir (IR) is a Category A, earth-fill embankment reservoir, located approximately 6km north-east of Blackburn in Lancashire. It is currently used to provide storage for public water supply. It was formed by the construction of an earth embankment across the Dean Brook river and is the lower reservoir in a cascade […]

Drumaroad Water Treatment Works (WTW) supplies water to many households throughout Northern Ireland. A 2013 report commissioned by NI Water identified the need for increased potable water storage facilities within the Drumaroad Supply Zone to reduce the risk of water shortages under certain network situations. As part of a £13m investment to modernise the existing water infrastructure […]

Edale Mill Cottages Sewage Treatment Works is located in the heart of the Peak District National Park and serves a small community comprising 29 properties. The asset expired biofilter works and septic tank was process and hydraulically undersized and had been a source of odour complaints for the close neighbours for a number of years. […]

The large industrial town of Ellesmere Port in Cheshire is experiencing population growth, thanks to good transport links and an array of employment opportunities. The local population is set to rise by a further 10% by 2036, to over 76,000, so upgrades to the Ellesmere Port Wastewater Treatment Works (WwTW) are necessary to cope with […]

As the River Ely flows towards Cardiff Bay, it passes under the A48 Cowbridge Road bridge in Cardiff. During periods of heavy rainfall, debris collects around the bridge’s central pier, reducing the capacity of the bridge and partially blocking the flow of the river. Blockages significantly increase flood risk locally, and once debris has accumulated, […]

As part of the capital investment programme for the years 2020 to 2025 (AMP7), Yorkshire Water Services (YWS) set out to deliver a programme to comply with new regulatory obligations on phosphorus (P) standards (Water Industry National Environment Programme – WINEP) while ‘greening’ their approach to wastewater treatment by prioritising solutions with lowest whole life […]

Faughan Raw Water Pumping Station (RWPS) is located adjacent to the River Faughan and abstracts water from the river. It provides screening by means of bar and band screens before pumping the water via a 30 inch steel raw water pumping main to Carmoney Water Treatment Works (WTW). Carmoney WTW has a minimum daily output […]

Northumbrian Water’s Fontburn Water Treatment Works is located on the outskirts of the Northumberland National Park and produces drinking water for around 50,000 homes in rural and semi-rural areas from Longhorsley and Morpeth, down through Bedlington and as far as North Shields on the River Tyne. The plant produces approximately 20 million litres of water […]

The North Glasgow Integrated Water Management System (NGIWMS), Glasgow’s Smart Canal, has created a pioneering drainage system, incorporating the historic Forth and Clyde Canal to provide one of the first autonomous and dynamically managed surface water systems in the world. The new system is supporting the regeneration of an area in north Glasgow enabling the […]

The town of Hailsham in East Sussex has been experiencing significant housing growth in recent years. To accommodate local housebuilding targets and protect the environment, Southern Water has invested £30m to upgrade the Hailsham North and Hailsham South Wastewater Treatment Works (WwTWs) using innovative technology. Upgrading these works was necessary to comply with a stricter […]

Operated by South Staffs Water (SSW), Hampton Loade Water Treatment Works is located five miles from Bridgnorth, Shropshire and supplies around 700,000 customers. Constructed in the 1960s, the site comprises the treatment works, an intake on the River Severn and a regulating reservoir at Chelmarsh which stores the abstracted river water. The river intake is […]

Hanningfield Water Treatment Works (WTW) is the largest water treatment facility operated in the Essex & Suffolk Water supply area. It has been expanded over numerous phases and is currently in need of improvements to its washwater treatment plant in response to changing influent water quality. Hanningfield WTW draws water from Hanningfield Reservoir which is, […]

Located in Lincolnshire east of Doncaster, Severn Trent’s Haxey Graizelound Sewage Treatment Works (STW) serves a residential population equivalent of 5,169 with no trade loads within the catchment. The works receives pumped flows from two pumping stations located in the catchment. The present permit is BOD 25mg/l, suspended solids 45mg/l, ammonia 15mg/l with a dry […]

Heaton Park Reservoir is located within Heaton Park, approximately 5 miles north of Manchester city centre. The reservoir is over 90 years old and has the capacity of 2,800,000m3 at top water level. The reservoir was previously used to store treated water for the Manchester Ring Main from Haweswater and Thirlmere aqueducts. However, since the […]

The sustainable energy efficient route to advanced digestion and safe biosolids reuse

In the PR19 agreement, water companies were encouraged to provide resolution to long-standing flooding problems being experienced by customers – but allowed a less prescriptive approach on the actual projects defined in the Water Company’s Price Review submission. This new process allowed the water companies a degree of discretion on the number and frequency of […]

In the PR19 agreement, water companies were encouraged to provide resolution to long-standing flooding problems being experienced by customers – but allowed a less prescriptive approach on the actual projects defined in the Water Company’s Price Review submission. This new process allowed the water companies a degree of discretion on the number and frequency of […]

During the 1950s the Holme Sluice Gates structure was constructed, diverting the River Trent from its original path around the Country Park through a newly excavated 80m wide cut channel. The gates are operated by the Environment Agency to maintain navigable river levels within the Nottingham area. At the side of the sluice gates is […]

Advance-plus, a joint venture between MWH Treatment, J Murphy & Sons and Stantec UK, are currently delivering a project at Horwich WwTW on behalf of United Utilities. The project is required to deliver the Environment Agency’s Water Industry National Environment Programme (WINEP) and takes into consideration future population growth based on a 2035 design horizon. […]

Digital solution enables wastewater treatment assets and networks to be optimised in real time

The Johnson Street Storm Overflow (SO) Screening Project in Gateshead was designed to protect the River Tyne from aesthetic pollution improving river quality for the benefit of customers, wildlife and the environment. The SO at Johnson Street was previously a significant unscreened discharge to the River Tyne. The project scope was to screen all spill […]

Keadby Terminal Assisted Outfall (TAO) Pumping Station is at the end of an intricate system of rivers and pumping stations within the low-lying Isle of Axholme catchment in Lincolnshire. It was originally built in the 1940s to discharge water from three parallel channels known as the Three Rivers, into the River Trent during high tides. […]

Northumbrian Water’s Layer Water Treatment Works is located on site at Abberton Reservoir, just outside Colchester in Essex. It is the primal source of water treatment for the reservoir and produces clean drinking water for most of the north Essex region of Essex & Suffolk Water’s operating area, with a designed output of 145 Mld. […]

The brick-built Maiden Lane Reservoir holds 67 million litres of water and supplies a population equivalent of approximately 200,000 people in north-east London.  The reservoir is located in Dartmouth Park which opened to the public in 1972 and is in the London borough of Islington.  The top of the embankment gives an open semi-panorama of […]

Matchams Raw Water Intake is located on a fast-flowing bend on the River Avon. The building was constructed c.1955, and provides a reliable source of raw water to Alderney WTW in Bournemouth. The water depths along the extraction point are typically 3-5m (relative to ‘ordinary’ water levels), with a high river flow rate, circa 3 […]

Northumbrian Water Group (NWG) have recently upgraded their clean water treatment processes at Mosswood and Lumley Water Treatment Works (WTWs). This was to increase quality and resilience of customers’ water supplies by adding ultraviolet (UV) irradiation as an extra barrier of protection. The main innovation of these projects was that they provided a vastly more […]

The North London Heat & Power Project is a ten-year, £1.2 billion programme to replace the current Edmonton energy from waste facility. It is being constructed on behalf of North London Waste Authority at the Edmonton EcoPark and includes a world-class Energy Recovery Facility (ERF), to generate energy from waste in the form of heat […]

There is currently limited ability within the existing Northern Resource Zone to transfer water between WTW demand zones during onerous operating conditions or during a major incident at any one of the WTWs. At Carmoney WTW recent flooding at the River Faughan disabled the abstraction plant and raised the pollution risks associated with the nearby […]

Pant-yr-Eos is a large raised reservoir situated approximately 2km east of Risca in the City of Newport, Monmouthshire. It is impounded by a 27m high, 280m long embankment dam with clay core, and has a storage capacity of approximately 600 Ml. The reservoir was completed in 1878 for provision of water supplies to Newport. To […]

Papplewick Borehole Pumping Station is one of a series of pumping stations constructed during the Victorian period by Thomas Hawksley to provide clean and reliable drinking water to the city of Nottingham. When brought into operation in 1884, the steam pumping station extracted groundwater via two deep wells with an ornate housing constructed over Well […]

The construction of Plas Uchaf Reservoir was completed in 1870. It has an embankment dam that is approximately 15m high, with a puddle clay core. It has a retained capacity of 225,500m3 and a surface area of 3.5ha. The reservoir is formed across a tributary of the River Elwy, with Dolwen Reservoir located approximately 0.7km upstream of Plas […]

The Queen Elizabeth II (QEII) Reservoir is a raw water reservoir in South West London that is owned and operated by Thames Water. The reservoir holds over 19 million litres of water, equating to 10% of the raw water storage for London. Once treated, this provides clean potable drinking water for millions of people across […]

Quin Wastewater Treatment Plant (WwTP) is a small works serving a rural village in County Clare in the west of Ireland. The plant has been operating with a capacity of approx. 650 population equivalent (PE) and is operated and controlled by Irish Water. It discharges into the River Rine which flows to the Shannon Estuary, […]

Ravenhill Avenue is located in south Belfast, close to the city centre. It is a densely populated residential area which has seen recent development of historically industrial sites. The sewer infrastructure in Ravenhill Avenue dates back to the early 20th century, and is therefore in poor condition and undersized to deal with today’s flows. Unfortunately, […]

When constructed in 1979, as part of the Kielder Transfer Scheme, Riding Mill Pumping Station was the largest pumping station in Britain. Abstracting flows from the River Tyne, it enables Northumbrian Water (NWG) to transfer water from Kielder Reservoir to the Derwent, Wear and Tees rivers, whilst supporting the operation of Mosswood WTW. The site […]

Rothbury Sewage Treatment Works is an unmanned Northumbrian Water site located 13 miles north-west of Morpeth, Northumberland. It is on the western valley slope of the River Coquet, a designated Site of Special Scientific Interest. The area is a popular year-round holiday destination with several caravan sites within the catchment. The original works dates from […]

The project is located within the residential area of Roundhay in north Leeds, less than 500m from the city’s largest park. The immediate area’s combined system serves in excess of 1900 residential properties and ultimately feeds into the wider Leeds city combined system via Roundhay Park Lane Combined Sewer Overflow (CSO). Hydraulic and water quality […]

Severn Trent is undertaking a programme of rehabilitation works at one its borehole pumping stations (BPS); a groundwater abstraction site consisting of three boreholes (BH1, BH2 and BH3) that provides up to 10 megalitres per day (Ml/d). The three boreholes historically operated in a duty/assist/standby configuration. The site was previously operating at below its intended […]

Minimising energy consumption and CO2 emissions are at heart of all modern water companies and the 2030 net zero carbon emission target can only be achieved if real and direct effort is dedicated to this. The pump efficiency programme described within this article is a major part of the energy efficiency strategy undertaken by South […]

The Eels (England and Wales) Regulations 2009 requires an eel screen to be installed within a diversion structure capable of allowing at least 20m3 of abstraction in a 24-hour period. The focus of this programme is to protect a threatened species of fish, brook lamprey (Lampetra planeri). This eel-like ancient fish is rare in the UK […]

Southwaite is a small rural village in Cumbria about 5 kilometres south of Carlisle. The works treats a population of about 1,000 from the village and the nearby M6 Motorway Services. The existing trickling filter works had reached the end of its asset life and needed to be upgraded. In a first of its kind […]

Stoke Bardolph Sewage Treatment Works (STW) is Severn Trent’s second largest STW and serves a population of c. 620,000. The site is also a major regional sludge centre, meaning it takes a high volume of sludge imports from other sites in the region. Stoke Bardolph has a sludge treatment capacity equivalent to a population of […]

Strongford STW is a major sewage treatment works serving the population equivalent of circa 350,000 from Newcastle-under-Lyme and Stoke-on-Trent. The site’s sludge treatment facility provides a major centre for regional operations. Based on a forecast increase in population, it was identified that an increase in treatment capacity would be required to accommodate the local growth. […]

Stroud is located in Gloucestershire near the southern boundary of the Severn Trent region between Gloucester and Bristol. The catchment is a mix of urban and rural areas and has a population of circa 67,000. The sewerage network is primarily a combined network with Wallbridge Combined Sewer Overflow (CSO) being a key asset close to […]

Swinsty Reservoir is the third in a cascade of four impounding reservoirs in the Washburn Valley, North Yorkshire. The reservoir is impounded by a 490m long, 24m high earth-fill embankment dam with a central puddle clay core, storing 3.94 million cubic metres at top water level. The overflow is located on the right-hand side (RHS) […]

Advanced oxidation technology for the effective treatment of APIs in water and wastewater

In September 2014 Severn Trent received an application under Section 101A of the Water Industry Act to provide first time sewerage to 11 properties in the Nottinghamshire village of Teversal. The outcome of an assessment of the existing sewerage provisions identified environmental or amenity problems at 18 properties and concluded that the provision of a […]

A complex ground improvement scheme has been designed and installed at Earl Pumping Station (EARPS), one of Tideway East’s sites, to enable the excavation and permanent works for the combined sewage overflow (CSO) chamber to be carried out. Challenges such as local contamination, site congestion, costs and time scale had to be overcome by delivering […]

In May 2018 United Utilities appointed Mott MacDonald Bentley (MMB) to deliver an NEC Option A design and construct project for the upgrade of one of their water treatment works (WTW) in the northwest of England. The project scope comprised upgrade of several key treatment processes to ensure compliance with Badenoch and Bouchier performance recommendations […]

As the UK’s largest listed water company, United Utilities aspires to ensure resilience of its network to the effects of climate change, improving the quality of wastewater effluent and providing a reliable and wholesome drinking water supply to its customers. To help drive greater efficiency and innovation in its network, United Utilities appointed Costain as […]

Innovative clean water sludge dewatering at Williamsgate

The River Gwili and River Gwendraeth Fawr in Wales have long suffered from poor water quality, often failing to meet phosphate targets. It was believed that the discharges from seven wastewater treatment works were contributing to deterioration in these two rivers. The need to improve the river water quality was established, but the means to […]

Flood events in the United Kingdom during the summer of 2007 resulted in a loss of essential services and infrastructure not seen since World War II. Reportedly, over half a million people were left without water or electricity supply, with the estimated cost of the events exceeding £3.2 billion. The subsequent Pitt Review commissioned by […]

Wing WTW is part of the Anglian Water network, located in the county of Rutland in the East Midlands. The treatment site originally opened in 1977 and was then expanded to include a granular activated carbon (GAC) system in 1989. Morcott WTW, which was commissioned in 2010, is adjacent to Wing with a combined area […]

The Ynys-y-Fro Reservoir system is situated 1km north-east of High Cross, Newport. The system comprises two reservoirs in cascade: an upper ‘subsiding’ reservoir and a lower ‘old pond’ reservoir. The upper reservoir is immediately upstream of the lower reservoir. The lower reservoir was constructed as an earth embankment dam and was built for the supply […]

Ashbourne Sewage Treatment Works (STW) in Derbyshire serves a population equivalent of 48,259 from both domestic customers and a high trade load, primarily from poultry processing. There has been a works in this location since the 1930s, with existing processes including inlet pumping, 2mm fine screening, grit removal, primary settlement, secondary treatment through an oxidation […]

Barkers Haugh STW receives wastewater from a population of approximately 36,000 people. Due to a ratcheting of the Environment Agency consent in response to population growth (+4000) and a tighter total iron consent of 4mg/l an upgrade of the works was required. A total of £8m was invested to improve the quality of the effluent […]

The small villages of Huisinis and Gobhaig on the Isle of Harris each consist of a few households, but in the summer months the local beach is inundated with campers and campervans. This means that the water demand fluctuates dramatically through the year. The two villages were served by single, basic supplies: Huisinis by a […]

South East Water’s Beenhams Heath WTW serves the surrounding area of Maidenhead and Bracknell. Raw water is pumped via submersible borehole pumps from two off-site locations at Hurley and Waltham. The Hurley flows are directed through a membrane filter before passing through the GACs and combining with the Waltham flows via a collecting tower and […]

Eel populations have seen a sharp decline since the 1980s and whilst the exact reasons are unknown, legislation in the form of the ‘Eels (England and Wales) Regulations 2009’ was brought in to provide eels with extra protections. Within the regulations there is a requirement to prevent eels becoming trapped within raw water abstraction systems. […]

Blackburn WwTW was constructed in the 1960s and principally treats domestic crude sewage from the Blackburn catchment, with two major additional contributions; a high strength trade effluent from the InBev brewery and an ammonia rich return liquor flow from the sludge treatment plant. The key river water quality/water framework directive parameters within the revised environmental […]

The Boston Barrier Tidal Flood Defence Scheme is a £100m project for the Environment Agency, delivered by BMMJV (a joint venture between BAM Nuttall and Mott MacDonald), to reduce the risk of tidal flooding to 14,300 properties and businesses in Boston, Lincolnshire. Boston is located on the east coast of the United Kingdom off The […]

Burnley WwTW serves a domestic population equivalent (PE) of 107,115 plus trade load. The existing site processes include screening and grit removal, primary settlement, activated sludge plant (ASP) with final settlement, nitrifying filters, chemical dosing and storm storage tanks. The sludge treatment facilities include sludge thickening, THP, mesophilic anaerobic digestion (MAD), associated ancillaries and sludge […]

The Ayrshire Strategic Resilience Programme involves the transfer of water from the Milngavie WTW, located north of Glasgow, to the Ayrshire and East Renfrewshire regions southwest of the city, increasing resilience for approximately one million customers. Phase 1 (Amlaird & Gorbals) was completed in 2018 and Phase 2 (Highlees) will be completed in 2021. Phase […]

Carlisle WwTW is in north Cumbria, which is part of United Utilities’ northern area. The site is located to the north west of Carlisle’s city centre, on the banks of the River Eden, and serves the city of Carlisle. The treatment works receives domestic sewage, trade flows, and tankered imports, providing primary and secondary treatment […]

Clabby is a rural village located approximately 5km from Fivemiletown on the border between Counties Tyrone and Fermanagh. The existing wastewater treatment works was constructed in 2002 on the outskirts of the village with a design PE of 271 for a Water Order Consent (WOC) of 23:30 (BOD:SS). With a current PE of 450, the […]

Welsh Water’s sludge strategy is to treat 97% of sludge using advanced anaerobic digestion (AAD) technology. The Cog Moors AAD facility was constructed to supplement the existing facilities at Cardiff and Afan in South Wales along with the recently constructed Five Fords facility in North Wales. AAD gives the benefits of: Meeting the Enhanced Sludge […]

The River Marchnant and River Cownwy lie within the valley of Lake Vyrnwy, Powys. The purpose of this project is to provide environmental flow releases below the Cownwy and Marchnant diversion intakes that supply Vyrnwy Reservoir. The scheme will amend the existing structures to enable a 25/75% proportional flow split, including a Q99 hands-off flow. […]

Craighead WTW is a new water treatment works located on a greenfield site close to the existing works in the north-east of Scotland. The project objective is to improve the treatment of water to the customers of the town of Huntley and surrounding areas. The existing Craighead WTW has reached the end of its economic […]

Dolwen Reservoir is a Category A Large Raised Reservoir as defined under the Reservoirs Act 1975. It is located on a tributary of the River Elwy, 0.7km upstream and north of Plas Uchaf Reservoir, near Abergele, Conwy, Wales. It was constructed in 1905 and has a capacity of approximately 288,185m3. Dŵr Cymru Welsh Water commissioned […]

Wessex Water’s £50m project to upgrade Durleigh Water Treatment Centre (WTC) in Somerset is progressing on programme and within budget, despite some particular challenges posed by the Covid-19 pandemic. Work at the site near Bridgwater started in 2019. It is the largest single-value scheme delivered by Wessex Water’s Engineering & Sustainable Delivery (ESD) department and […]

The Evenlode is a headwater of the River Thames. The catchment covers an area of around 30,000 ha, flowing from Moreton-in-Marsh to Eynsham over a distance of more than 75km. It consists of 16 Water Framework Directive (WFD) waterbodies, many of which are failing their targets for phosphate alongside other chemical, hydromorphological and ecological elements. […]

Providing efficient phosphorus removal for the post-IFAS treatment plant at Ellesmere Port WwTW to achieve <0.5mg/l of Total P

Temporary abstraction of groundwater required for infrastructure construction is now a licensable activity in the UK. This article presents a series of case studies describing techniques to manage and conserve the groundwater resources beneath and surrounding a construction site, so assisting the licensing process.

The Haweswater Aqueduct (HA) was constructed by the Manchester Water Corporation between 1935 and 1955 to provide water from Haweswater Reservoir to Heaton Park Reservoir in Manchester. The aqueduct was initially designed to convey 105 million gallons per day to allow for future increase in demand and is constructed of 8’ 6” concrete lined tunnels […]

The NEP Quality drivers for the Southern Water’s Hawkhurst South WTW are to meet the new iron and total phosphorus discharge permit limits by 31/12/2021, a tightened ammonia permit by 31/03/2025, and to maintain compliance with all aspects of the current discharge permit at lowest whole life cost. In addition, the population equivalent is set […]

In recent years, phosphorus discharge limits have been tightened to improve the surface water quality, particularly to address eutrophication issues. Before 2015, only a small number of sites in the UK had a total phosphorus (TP) permit as low as 1 mg/l under the Habitats Directive. Since then, TP permits have been continuously tightened in order to achieve […]

Heigham Water Treatment Works (WTW) has supplied clean water to the City of Norwich for more than 100 years. The treatment works supplied an average 42 Ml/d of water into the Norwich Public Water Supply Zone serving a population in excess of 200,000. The £36m scheme was the largest capital investment project within Anglian Water’s […]

In the PR19 agreement, water companies were encouraged to provide resolution to long-standing flooding problems being experienced by customers – but allowed a less prescriptive approach on the actual projects defined in the Water Company’s (WCo’s) Price Review submission. This new process allowed WCo’s a degree of discretion on the number and frequency of flooding […]

In the 1850s, London’s population was approximately two million. In 1858, predicting population growth, Sir Joseph Bazalgette constructed a combined sewerage system collecting both wastewater from homes and businesses, and rainwater run-off, to serve a population equivalent of four million. Now, with London’s population approaching nine million, the sewerage network can become overloaded during severe […]

Constructed in 1991, the existing Withernsea Sewage Treatment Works (STW) lies 2km south of the East Yorkshire coastal resort town of Withernsea and was built circa 180m from the cliff edge with an expected asset life in excess of 60 years. Since 1998, coastal erosion rates in the area have increased significantly from historic levels, […]

Sludge treatment in the Huddersfield area was previously provided by incineration at Calder Valley Incinerator, located at Yorkshire Water’s Upper Brighouse Site. This incinerator has been inoperable since a weather event in 2015. Following a strategic review, Yorkshire Water Services (YWS) decided to progress with conventional mesophilic anaerobic digestion (MAD) plant supported by lime sanitisation […]

Located in Saltend, Yorkshire Water’s Hull WwTW provides sewage treatment for a population equivalent of over 1 million people, covering an area from the west of Hull to Hedon in the east. This case study follows on from an initial paper in 2020 and details the progress of the new inlet works and the refurbishment […]

A disruptive technology for high-value product generation from wastewater treatment

The Kineton STW required investment in AMP7 due to the introduction of a 0.5mg/l total phosphorus effluent limit, which comes into force by the end of December 2021. The new works is designed to cater for flows from Kineton, Butlers Marston and Radway equating to a combined design horizon population equivalent of 3,946. The existing […]

Both Ledbury and Brockhampton are medium sized works (c15,000 PE) serving the catchments of Ledbury and Cheltenham respectively. Each site was subject to a first-time phosphorus permit with Brockhampton receiving higher flow to full treatment and a tighter BOD permit, and Ledbury having significant growth projected in the catchment. Both sites both required new tertiary […]

Welsh Water raised a programme of quality schemes for completion in AMP6 to address tightening of phosphorus permits set by Natural Resources Wales (NRW) at ten wastewater treatment works. Some of the sites in the programme were subject to a new total phosphorus (TP) permit of 0.5 mg/l T-P and required the installation of a […]

Lowdham is a village in Nottinghamshire that had a history of external and internal sewer flooding to properties, caused by hydraulic incapacity of the combined sewer network. A new 1400m3 offline storage tank was required along with catchment resilience work, which included working in partnership with the local authority to resolve surface water flooding, by […]

Lower Neuadd Reservoir is located in the Brecon Beacons, 5km north of Merthyr Tydfil in south Wales. The reservoir, which is an embankment dam, was constructed in 1884. It is the middle of a cascade of three reservoirs, with Upper Neuadd situated 3km upstream of the much larger Pontsticill Reservoir. Lower Neuadd Reservoir had a […]

Ludham WTW supplied 2.1 million litres a day (MLD) of treated water to 2,464 properties in Ludham and Martham whilst originally being fed by Ludham boreholes, with emergency supply coming from East Ruston boreholes. This £7.6m scheme addressed area growth and abstraction licence challenges by combining different schemes to deliver an efficient solution for customers […]

Maerdy Water Treatment Works (WTW) is located 35km north of Cardiff, supplying up to 16Ml/d potable water to customers in Ferndale and the surrounding area. Raw water is gravity fed from Castell Nos and Lluest-Wen Reservoirs and the quality can be highly variable, particularly following heavy rainfall resulting in a challenge to WTW performance. In […]

Customers’ residential properties on Maryville Avenue, South Belfast, had experienced out-of-sewer flooding during periods of heavy rainfall due to the poor condition of the sewerage infrastructure and the partial collapse of a 375mm diameter combined sewer. This sewer is located within 5m of the Belfast to Dublin high-speed rail line and in close proximity to […]

Northumbrian Water (NWL) provides water supply and sewerage services to a population of 2.7 million in the north east and 1.8 million in the south east of England, delivering 1,100 MLD of drinking water. Potable water treatment works vary from small groundwater sources to large surface water treatment facilities such as Mosswood Water Treatment Works […]

The Phosphorus Removal Enhancement Programme (PREP) Batch is a group of projects within United Utilities. These projects provide improvements delivering the Environment Agency (EA) Water Industry National Environmental programme (WINEP) outputs for a future population growth based on a 2035 design horizon. With a focus on ensuring the lowest ‘whole life cost’ solution, the team […]

Severn Trent’s existing Poolend Borehole Pumping Station is located near Leek in Staffordshire and is one of four sources that supply water to Ladderedge DSR. A second borehole source feeds into the Poolend site where both sources undergo water treatment (pH correction, plumbosolvency, marginal chlorination, and ultraviolet (UV)). To ensure continued water security in the […]

Ringsend Main Lift Pumping Station (MLPS) is located at Pigeon House Road, Ringsend, Dublin 4 and forms a critical part of the overall Dublin Drainage Network. It is operated by Dublin City Council and is under the joint control of the Local Authority and Irish Water. The MLPS pumps unscreened, unfiltered wastewater from the city […]

Portsmouth Water’s River Itchen Water Treatment Works (WTW) is located to the east of Southampton Airport near to the picturesque Itchen Valley Country Park and abstracts water directly from the River Itchen for treatment. The River Itchen is 28 miles long and runs from mid-Hampshire near Cheriton through Winchester to Southampton at Mansbridge and is […]

Large diameter rising main deterioration has become a big capital expenditure because of the risk of major infrastructure failure. The costs of repairing these assets in the event of failure are likely to be very high and characterise a large problem for water and sewerage companies in the UK. Wessex Water’s critical crossing review had […]

Located in Temple, near Gorebridge, in Midlothian, Scotland, Rosebery WTW treats raw water sourced from Megget and Gladhouse Reservoirs which is blended at the works inlet. The blended raw water is generally low in turbidity (2.0 NTU 95%ile), moderate colour (63 mg/l Pt/Co 95%ile), with average to high metals concentrations (55 to 300ug/l Mn, Al, […]

In 2016, United Utilities was issued with a Service Reservoir Cleaning notice by the Drinking Water Inspectorate (DWI) as part of the Company transformation programme. Inspecting, cleaning and maintaining the reservoirs first required a batch of projects to provide the facility to isolate five existing service reservoirs (SRs) from the water network, whilst maintaining supply […]

The Eels (England and Wales) Regulations 2009 came into force on 15 January 2010 to support the UK in implementing EC Council Regulation (1100/2007). The regulations require all surface water abstractions of more than 20m3/d to be fitted with suitable eel screens by 2021. A batch extension was granted to Severn Trent until end of […]

South Ferriby lies on the south bank of the Humber Estuary, approximately 12 miles from Hull. During a tidal surge in December 2013, the existing flood embankments were inundated causing £50m worth of damage by flooding 129 properties, the CEMEX cement plant, 500 hectares of agricultural land and the A1077. Residents were left fearing for […]

The Sunderland Groundwater Stations (GWS) have historically provided a reliable and cost-effective source of good quality water to the Wearside distribution area. They were mostly built in the late 19th and early 20th centuries and consist of one or more shafts, of up to 150m in depth, into the magnesian limestone aquifer. Each station has […]

Donemana Wastewater Treatment Works (WwTW), located on the banks of the Burn Dennet River and at the foothills of the Sperrins in Co. Tyrone, serves the Donemana area – the largest of the thirteen villages in the Derry City and Strabane Council area. The existing works had been in service for almost 50 years with […]

Newry is situated some 35 miles south-west of Belfast at the northernmost end of Carlingford Lough, where the Clanrye River/Newry Estuary enters the sea. Newpoint Wastewater Pumping Station (WwPS), situated off the Warrenpoint Road, is the terminal pumping station for the city. The WwPS receives incoming flows from the greater Newry and Carlingford area at […]

The Shared Waters Enhancement & Loughs Legacy (SWELL) project is an extensive programme of work being led by NI Water working in partnership with Irish Water, the Agri-Food & Biosciences Institute (AFBI), Loughs Agency and East Border Region. Funded under the EU’s INTERREG VA Programme, managed by the Special EU Programmes Body, the €35m project […]

The Shared Waters Enhancement & Loughs Legacy (SWELL) project, funded by the EU INTERREG VA Programme, considered wastewater assets with the greatest potential to improve water quality within the Carlingford Lough and Lough Foyle drainage catchments. This included for a major upgrade to the inlet works at Strabane WwTW. In recent times, excessive flows arriving […]

Warrenpoint is a small town in County Down, situated on the northern shore of Carlingford Lough, approximately 7 miles south-east of Newry. The shared water of Carlingford Lough marks the border between Northern Ireland and Ireland. Due to its scenic beauty and coastal location, Warrenpoint is popular with day trippers and the town can experience […]

Advanced cyclic activated sludge technology with simultaneous nitrification and denitrification and biological phosphorus removal in a single treatment stage

The original treatment works was built in the 1970s in an area carved out of the cliff face. It comprised a screening plant for grit and fat removal, before flows are pumped via a hand-dug long sea outfall 2.5km out to sea. This outfall replaced the original Victorian short sea outfall built in 1874, although […]

The Thames Tideway Tunnel project will upgrade London’s Victorian sewer system, which was developed by Sir Joseph Bazalgette in the mid-1800s for a population of 4 million people. Now with over 8 million Londoners, the system capacity, around 6mm per hour rainfall in the catchment, has been exceeded and the discharges of mixed water through […]

The Tideway project is a new £3.8 billion, 25km long combined sewage storage and transfer system currently under construction in London. The project is divided into three design and build contracts: West, Central and East. The scope of works of the Central Section, the largest contract, includes 12.7km of 7.2m internal diameter tunnel and eight […]

The Tideway project is a new £3.8 billion, 25km long combined sewage storage and transfer system currently under construction in London. The project is divided into three design and build contracts: West, Central and East. The scope of works of the Central Section, the largest portion of the project at over half its length, includes […]

The Tideway Tunnel is a new 25km long combined sewage storage and transfer system that will help protect the ecology of the River Thames by tackling the problem of overflows from London’s ageing sewers. The Central Section consists of eight work sites each incorporating a drop shaft, as well as two tunnel drives. Of the […]

The Tideway Project is a 25km long combined sewage storage and transfer system along the River Thames in central London, UK. The project is split into three design and build contracts with the limits of each contract determined primarily by geology along the alignment. The contract for the Central Section, the longest and most challenging […]

In the heart of London, the largest project in the UK water industry is underway. Tideway is a new combined storage transfer system, commissioned to provide London’s sewage network with additional capacity and prevent pollution of the River Thames. The colossal scheme consists of a 25km TBM bored tunnel with numerous shafts, associated outfalls and […]

The Thames Tideway Tunnel is a major infrastructure project that will intercept the existing London sewerage system, through a 25km-long tunnel and connection tunnels from Acton in West London to Abbey Mills in East London. The tunnel has a finished internal diameter of 7.3m, starting at a depth of 30m below ground until reaching a […]

The Thames Tideway Project is a major infrastructure project that will intercept the existing London sewerage system through a series of tunnels running 25km from Acton in West London to Abbey Mills in East London. There are 22 vortex drop pipe structures and other near surface structures that will intercept existing spills into the Thames; […]

The Thames Tideway Tunnel is a new storage and conveyance tunnel running through the centre of London, mostly under the River Thames. The main tunnel, which is approximately 25km long with an internal diameter of 7.2m, will run from Acton in the west through to Abbey Mills in the east. The project has been split […]

Over a number of years, properties in the Toome Road area of Ballymena, County Antrim (Northern Ireland), have experienced both external and internal flooding. The residents had been living in fear of further flooding every time there was significant rainfall and the flooding history also meant they had difficulties and extra expense in getting insurance […]

The sea defences along the coast of Lincolnshire mainly comprise of concrete seawalls fronted by sandy beaches providing flood protection to the low-lying coastal flood plain, which extends up to 15km inland and has a recorded history of inland flooding as far back as the 13th century. The Lincolnshire Open Coast Flood Risk Management Scheme […]

The Uckington Borehole Capital Maintenance (BCM) and Restoring Sustainable Abstraction (RSA) Treatment Project set out to achieve the goal of an ecological improvement of the River Worfe while safeguarding the public water supply to the Telford area network. Over-abstraction from the River Worfe was impacting the achievement of Good Ecological Status under the Water Framework […]

The picturesque village of Walton is located within the heart of Warwickshire adjacent to the River Dene. The existing privately owned sewage treatment facility located on the bank of the River Dene was life expired and would often flood, resulting in pollution to the river. An application was made to Severn Trent under Section 101a […]

To accommodate new housing and commercial growth in the Waverley/Catcliffe area of Sheffield, Yorkshire Water required the design and construction of a new pipeline to transfer the flows from a housing development of 4000 homes to the main Blackburn Meadows WwTW. The pipeline route crossed main dual carriageways, other roads, roundabouts, railway lines and passed […]

West Huntspill Water Recycling Centre (WRC) is a Wessex Water facility situated south of Highbridge in West Somerset. This environmentally sensitive site is within a National Nature Reserve and adjacent to a Site of Special Scientific Interest and a Special Protection Area (Bridgewater Bay and the Severn Estuary). The facility serves a catchment of 62,000 […]

Westnewton is a small rural village situated in Allerdale, Cumbria, three and a half miles from the Solway coast at Allonby and eight miles west of the market town of Wigton in the North West of England. The wastewater treatment works (WwTWs) serves a population equivalent (PE) of less than 300. The catchment was previously […]

Investment in Whitlingham WRC was identified by Anglian Water to ensure that the site remains resilient for Norwich’s growing population and support the environment of the River Yare; part of the Norfolk Broads. A full review of the existing assets and support to carry out on-site testing to understand the process limitations, identified potential opportunities […]

August 2020 saw the successful completion of a new 3.5km outfall pipeline comprising of onshore (2.5km) and offshore (1km) sections on the Holderness Coast in Withernsea, East Riding of Yorkshire. Due to continued coastal erosion, the purpose of the project was to relocate the existing Withernsea WwTW further inland and replace the exposed existing long […]

Wolsingham Sewage Treatment Works (STW) required upgrading in order to manage increased demand due to population growth in the catchment. The works, adjacent to the River Wear between Crook and Stanhope in northwest Durham, included a combination of new STW components and the upgrade of existing facilities. Northumbrian Water sanctioned the £5.77m project and Tilbury […]

Affinity Water own and operate a crucial and long-standing water treatment works which is situated to support the north London water supply infrastructure. Any shortfall in the production of treated water leads directly to the need for importing water from a neighbouring water company. Four groundwater sources are combined and treated at site, all of […]

Ardsbeg Water Treatment Works (WTW) is located in a remote area in the north of Co. Donegal in Ireland and treats water from a lake source to serve local villages of Gortahork and Falcarragh as well as rural farms and dwellings. The WTW was originally built in the 1960s and was modified in 2003. However, […]

The Thames Water Ring Main (TWRM) in London is an 80km long, 2.5m diameter tunnel built between 1988 and 1994 to take water from five treatment works and transfer flows via pumping stations housed in shafts along the route. It is a major part of London’s water supply infrastructure and carries an average daily flow […]

Sewer rehabilitation projects demonstrate the benefits of basalt

The Thames Water Ring Main (formerly the London Water Ring Main) is a major part of London’s potable water supply infrastructure. Originally constructed between 1988 and 1993, it forms a 50-mile ring of mostly 2.54 m (100”) diameter concrete pipeline to transfer potable water from water treatment works in the River Thames and Lea catchments […]

Wessex Water has in its management a sewer network of 35,000km, of which approximately 10% have a diameter of >900mm. These represent some of the most critical sewers due to their ability to carry larger volumes of wastewater, and therefore must be regularly inspected and maintained. The Bournemouth Coastal Interceptor Sewer (BCIS) is one of […]

Bentley Ings Pumping Station is located within the River Don flood corridor, north-east of Doncaster and protects over 3,000 residential and 172 commercial properties from fluvial risk. The pumping station was constructed in 1942 and failed in 2007 during an extreme River Don flood event, resulting in flooding to over 1,000 properties. The aim of […]

The Hereford Water Network is dependent on a single source of supply from the River Wye and Dŵr Cymru Welsh Water identified a need to assess the resilience of the network to maintain customer supply during any future loss of source supply events. The resulting hydraulic assessment identified the requirement to increase the available storage […]

The low-pressure standard (formerly called DG2) is defined by Ofwat as a pressure of less than 10 metres at a flow of 9 litres per minute when measured on the customer side of the water company stop tap. Any properties in breach of this threshold are recorded on the low pressure register and the number […]

Blackburn WwTW, located at Samlesbury near Blackburn, serves a population equivalent (PE) of approximately 400,000 and discharges final and storm effluent to watercourses that are tributaries of the River Darwen, feeding into the River Ribble estuary and ultimately into the bathing waters of the Fylde coast in the Irish Sea. Over the last 12 months, […]

Blackmoorfoot Reservoir, a storage reservoir situated south-west of Huddersfield in West Yorkshire, was constructed between 1871 and 1876 at a cost of £260,000. It has a capacity of over 700,000 gallons and covers an area of 102 acres and provides raw water to Blackmoorfoot WTW, which supplies treated water to Huddersfield and surrounding areas. The […]

New inlet works and moving bed biofilm reactor (MBBR) for ammonia removal

Northumbrian Water Group (NWG) have two sludge treatments centres, at Bran Sands STW on Teesside and at Howdon STW on Tyneside, which together process 100% of the sewage sludge arising from within its operating region, using an advanced anaerobic digestion (AAD) process. The resultant renewable biogas is converted into biomethane for export to grid. The […]

Located to the east of Stafford, Severn Trent’s Brancote Sewage Treatment Works (STW) catchment will see an increase in population from 78,075 current population equivalent (PE) to 85,532 by 2028. The site is split into two distinct areas with the STW processing the sewage flows from within its own catchment and the sludge treatment centre […]

The Bray Keleher Water Treatment Works (WTW) abstracts and treats a maximum of 45 Ml/d of river Thames water and is located on Monkey Island Lane, Bray, between Windsor and Maidenhead. The works is of strategic importance in maintaining supplies to the western region of South East Water (SEW). As part of the final determination […]

Brentwood Sewage Treatment Works (STW) is one of Thames Water’s medium sized treatment works. The site is located to the north-east of London between Harold Wood and Brentwood in Essex. The STW treats foul water from the catchment serving West Brentwood, Warley and Pilgrims Hatch. It currently serves a population of 36,500 which will increase […]

Between 1893 and 1904 the Birmingham Corporation dammed the Elan Valley in Wales and constructed an aqueduct to channel water to Birmingham. At the height of the industrial revolution, between 1800 and 1900 Birmingham was booming, and its population rose substantially. Following outbreaks of smallpox and diarrhea, city officials deemed it essential to provide its […]

The Birmingham Resilience Project (BRP) is designed to provide a backup source of raw water from the River Severn to the water treatment works that serves Birmingham. During planned or unplanned outages of the primary water source, the raw water system will abstract water from the River Severn between October and March and supply 117 […]

Raw water has been collected in reservoirs in the Elan Valley in Wales and transferred 118km under gravity through an aqueduct to the water treatment works (WTW) in Birmingham for treatment and distribution to the city’s residents and industries since the beginning of the 20th century. The original infrastructure was constructed over 100 years ago, […]

During AMP4, Thames Water Utilities Ltd (TWUL) undertook low flow investigations for the Letcombe Brook, in the Wantage area of Oxfordshire. It was determined that the abstraction at Childrey Warren Water Treatment Works (WTW) was having an adverse impact on the river flows and the local environment. A subsequent review of options which included augmentation, […]

Situated on the Derbyshire/Nottinghamshire border, Church Wilne WTW serves 600,000 Severn Trent (ST) customers in the East Midlands. Built in 1967 to extract and treat 27 ML/day from the River Derwent, the works has been extended twice to 135 ML/day meeting the needs of both a growing population and increased water quality standards. However, the […]

South East Water’s College Avenue Water Treatment Works in Berkshire supports the Maidenhead water supply infrastructure. It extracts raw water from three boreholes and three chalk wells, which is then dosed with sodium tripolyphosphate (STPP), aerated, passed through granular activated carbon (GAC) absorbers, and finally injected with sodium hypochlorite to super-chlorinate it before entering the […]

The Counters Creek Flood Alleviation Scheme was developed by Thames Water in response to the widespread basement flooding caused by intense rainfall in the Royal Borough of Kensington and Chelsea and the London Borough of Hammersmith and Fulham. The scheme aims to reduce flood risk for relevant basement properties through a series of interventions that […]

Low-temperature sewage sludge drying with carbonisation and phosphorus recovery: experience and lessons learned from municipal wastewater treatment plants in Germany

Durleigh Water Treatment Centre is located approximately 2km west of Bridgwater, Somerset and is Wessex Water’s second largest surface water treatment works serving a population of 44,500. The site was originally designed to treat up to 28.5 Ml/d, with water drawn down from the 959,000m3 Durleigh Impounding Reservoir. Raw water quality has deteriorated in recent […]

Located close to the English Channel, East Worthing WwTW serves a population of 140,000 in a largely urbanised area in West Sussex. In peak wet weather conditions, up to 71 million litres can flow through the site in a day. Due to the urban nature of the catchment, and some large and relatively shallow gradient […]

The large, industrial town of Ellesmere Port in Cheshire is experiencing population growth, thanks to excellent transport links and an array of employment opportunities. The local population is set to rise by a further 10% by 2036, to over 76,000, so upgrades to the Ellesmere Port WwTW are necessary to cope with increased throughput. The […]

The Foss Barrier and associated pumping station is a vital asset in the City of York’s flood defences and was constructed in the 1980s in response to severe flooding five years earlier. In flood conditions, a mechanical gate can be lowered to stop rising waters in the River Ouse from flowing back up into the […]

The River Ver is a chalk river tributary of the River Colne in Hertfordshire. Chalk rivers are a globally rare habitat, with around 240 existing worldwide. There are approximately 160 chalk streams in England with 10% located within the supply area of Affinity Water. The Environment Agency placed targets (through the Water Industry National Environment Programme) […]

Helston is located at the northern end of the Lizard Peninsula in Cornwall and the lower town has suffered from a long history of flooding from the River Cober. This ultimately prompted the development of a flood alleviation scheme (FAS) in 1989. However, following these works, there were further flood events in 1993, 1999, 2003 […]

Hookstone Road CSO in Harrogate, North Yorkshire, is a CSO chamber with upstream and downstream online storage provided by large diameter pipes. During storm events, pass forward flow is restricted by the 200mm outlet pipe and 90 degree bend downstream and partially fills the storage pipes before excess flows pass through a screen at the […]

The advanced anaerobic digestion (AAD) plant at Howdon STW includes 3 (No.) MWM gas engines that were commissioned in September 2013. The engines originally used biogas from the digestion process as fuel to produce steam for the thermal hydrolysis plant and generate electricity. The electricity generated by the engines when running on renewable biogas is […]

High Speed 2 (HS2) will be the UK’s new £56 billion high speed railway linking London to the Midlands and north of England with some sections of the route already under construction. The new high-speed railway line in Yorkshire will run from Chesterfield to Leeds. Yorkshire Water are the water and wastewater authority in this […]

Huddersfield Energy and Recycling Facility (Huddersfield E&RF) is in Mirfield on Yorkshire Water’s Upper Brighouse site. The project involved the demolition of the existing incinerator and construction of a new mesophilic anaerobic digestion facility that will produce electricity; equivalent to powering 5280 homes once it is fully operational. The primary drivers for the scheme were: […]

Hull WwTW located at Saltend, east of Hull, provides sewage treatment for a population equivalent of over 1 million people, covering an area from the west of Hull to Hedon in the east. The existing treatment works was built over 20 years ago and required some specific upgrading and refurbishment. The primary drivers for the […]

Located to the West of the town of Banchory, Aberdeenshire, Scottish Water’s Invercannie WTW is currently a 49 Ml/d water treatment works which serves the local population as well as providing raw and treated water to Mannofield WTW in Aberdeen via two 28km aqueducts (one laid in 1866 and the other in 1924). The treatment […]

Keele University is situated in the village of Keele, Staffordshire, on the outskirts of Newcastle-under-Lyme. It was established in the 1940s and has grown considerably to educate approximately 10,000 students on a 625-acre (253ha) campus. The University owns and operates its own water supply infrastructure; this includes approximately 16km of pipework and a service reservoir. […]

Severn Trent’s Ketford Borehole Pumping Station (BPS) is a critical source which feeds into the Bromsberrow BPS, where the water is blended before being pumped into supply. The pumping station was vulnerable to outage largely due to having a single operational borehole. There were three boreholes at the site (BH1, BH2 and BH3), which historically […]

Kirk Hallam is a village on the outskirts of Ilkeston, Derbyshire in the East Midlands. It had a history of internal and external property flooding from the sewerage network in three separate locations within the catchment. Severn Trent (ST) appointed nmcn PLC (now Galliford Try) as the design and build contractor under the AMP6 framework […]

Langford Water Treatment Works (WTW) is owned and operated by Essex and Suffolk Water (ESW), part of the Northumbrian Water Group (NWG). The treatment works, located near the town of Maldon, treats water abstracted from the nearby River Chelmer and River Blackwater. The river water quality changes greatly with rainfall, at times of excessive turbidity […]

Yorkshire Water’s Langsett Water Treatment Works (WTW) is located 17km north-west of Sheffield in South Yorkshire, on the edge of the Peak District National Park. The WTW treats raw water which is extracted by gravity from two upland impounding reservoirs at Langsett (adjacent to the WTW) and nearby Midhope (approximately 1km south-east of the site). […]

In April 2015, BT announced they would be withdrawing support of all their very low bandwidth (VLB) leased lines from a fixed deadline of the 31 March 2020. Leased lines are dedicated lines, used as connections to carry communications or electrical signals between two locations. They are often used in conjunction with telemetry outstations, with […]

United Utilities’ (UU) vision is to be a leading north west service provider, and one of the best UK water and wastewater companies. It is a challenging vision, but one United Utilities are capable of achieving by focusing on three objectives to deliver the best service to customers, at the lowest sustainable cost and in […]

Llyn Brenig impounding reservoir is located in the Denbigh Moors in North Wales. It was constructed in 1975 and was officially opened by the Prince of Wales. It forms part of the River Dee regulation to manage flow into the Dee via the Afon Alwen. The reservoir has a capacity of around 60 million cubic […]

All freshwater fish species in England undergo migration in one form or another, ranging from movements pertaining to feeding and refuge habitats over the course of a day, to longer journeys (for example, between freshwater and marine habitats) on a less frequent basis. Between 2015-2020, Yorkshire Water, in partnership with the Environmental Agency as part […]

Loch Venachar Reservoir is located near Callander in Loch Lomond and the Trossachs National Park. The reservoir was formed in 1859 under the direction of civil engineer John Frederick Bateman (1810-1889), when the existing loch level was raised by the construction of a masonry dam across the outlet from the loch known as the Eas […]

Lough Fea Water Treatment Works supplies water to approximately 24,000 Northern Ireland Water customers, with the Lough Fea Clear Water Basin South supplying over 10,000 people in Cookstown and surrounding rural areas. A 2013 report commissioned by NI Water identified the need for increased potable water storage facilities within the Lough Fea Supply Zone to […]

The Lynemouth Colliery was part of a larger mining block linked to Ellington Colliery (Ellington Combine) that worked reserves under the North Sea; the mining block extended inland close to Morpeth. Groundwater lies above the rocks forming the coal measures. If mine water was to rise unchecked, it could pollute a source of water for […]

Maghaberry Wastewater Treatment Works (WwTW) serves the Maghaberry area and the local prison in the Lisburn and Castlereagh District Council area, in Co. Antrim, Northern Ireland. The Works is under the control of NI Water and provides primary and secondary treatment. The Works was insufficiently sized to suit the growing local population and the expansion […]

Marston Water Recycling Centre (WRC), near Grantham, serves a population of approximately 63,500 from Marston and the surrounding areas, with a capacity to treat up to 392 l/s of wastewater. The projected population growth in the area is approximately 76,000 until 2031, with the significant proportion of this growth estimated to occur by 2022. Following […]

Operated by United Utilities, the Morecambe sewerage system collects at Schola Green Wastewater Pumping Station (WwPS) located in the west end of the town. From there, flows for treatment are pumped via a 6km long pipeline to Morecambe Wastewater Treatment Works (WwTW), which is situated to the south, near to the village of Middleton. Both […]

Murton WTW is fed by six boreholes and supplies up to 350m3/hour of potable water to Berwick-upon-Tweed and surrounding areas, serving over 7,500 properties. The boreholes which feed the Berwick Water Supply Zone can contain turbidity, particularly when flows are high, interrupted or varied. The existing treatment process was unable to remove the turbidity, causing […]

Sustainable bio-P removal at small works

Severn Trent have made a £60m investment in Newark-on-Trent upgrading the sewers and water supply network throughout the town. The project provided relief to some 400 homes and businesses from sewer flooding, and provided a robust water supply system which will serve the town for many years to come. The project included a 2.8km segmental […]

Newham Sewage Treatment Works is located on the outskirts of Truro, Cornwall. The site treats wastewater from the city and the surrounding areas which are experiencing a rapid population growth. A £6.8m project was sanctioned by South West Water in May 2018 to provide a new secondary process stream, utilising the novel Nereda granular activated […]

Llanelli Wastewater Treatment Works (WwTW) in Llanelli, South Wales, serves the catchment’s 60,000 inhabitants and discharges treated effluent into the Loughor Estuary. The estuary is not only ecologically sensitive, but also a critical natural asset to the local community and to the wider South Wales region. It is a natural capital asset, home to commercial […]

Shakespeare Street in Nottingham is situated at the heart of Nottingham Trent University campus, a short walk from the main square in the city centre. The basements of a number of buildings in the area suffered repeat sewer flooding, ranking inside the top 1% of all flood risks across the Severn Trent (ST) region. In […]

United Utilities is the regional water company for the North West of England, delivering water and wastewater services to 7m people from Cheshire to the Scottish border. Oldham WwTW and Royton WwTW are two major wastewater treatment works located in Oldham, to the north east of Manchester. The Oldham and Royton Integrated Strategy (ORIS) project […]

The Phillipson Street CSO Scheme is located in Wallsend, a suburban area to the east of Newcastle city centre with an industrial past. In the catchment upstream of the existing CSO, a total of 3,869 people are served by a fully combined sewer network. The existing CSO has undergone several upgrades over at least the […]

Located on the edge of Strangford Lough, on the Ards Peninsula, Portaferry Road WwPS serves the eastern catchment of Newtownards, forwarding approximately 25-35% of the wastewater from Newtownards town to Ballyrickard WwTW, located approximately 3km away. Altogether Ballyrickard WwTW receives untreated foul effluent from six major pumping stations located within the Comber and Newtownards catchments: […]

In summer 2019, Northern Ireland Water commenced upgrade works to the water supply on Rathlin Island, Northern Ireland’s only inhabited offshore island. The current public water supply on Rathlin Island is supplied from groundwater. It consists of a pair of closely located boreholes feeding a simple double cartridge type filtration system with sodium hypochlorite dosing […]

After the implementation of the transfer of private drainage to Wessex Water in 2011, it became imperative that it was necessary to focus more attention on trenchless alternatives for repair of small diameter sewers. Wessex Water’s overall cumulative volume of public sewers doubled overnight from 17,000km to 34,000km, and the majority of that transferred stock […]

In 2017, aBV – a joint venture between Amey and Black and Veatch (now Binnies), and Environmental Techniques Ltd approached client Scottish Water about utilising carbon fibre (CFRP) and glass fibre (GFRP) to provide a 60-year rehabilitation technique to an existing pipe bridge; an approach that has never been used before in the UK Water […]

Rugby STW is situated on the south bank of the River Avon, approximately 1km north of the town of Rugby in Warwickshire. Final effluent from Rugby STW is discharged into the River Avon and needs to meet permits set by the Water Framework Directive (WFD). It provides sewage treatment to a population of circa 107,975. […]

As with all water companies, Northern Ireland Water (NI Water) work within the targets and guidelines set by their industry regulator, the Northern Ireland Utility Regulator and the Drinking Water Inspectorate (DWI). At present Northern Ireland’s existing potable water main infrastructure comprises approximately 26,700 km of water mains, delivering approximately 560 million litres of clean, […]

The Eels Regulations 2009 require an eel screen to be installed within a diversion structure capable of allowing at least 20m3 of abstraction in a 24-hour period. The focus of this programme is to protect a threatened species of fish, brook lamprey (Lampetra planeri). This eel-like ancient fish is rare in the UK and ranges […]

Refurbishment project to strengthen resilience of raw water supply to Essex strategic reservoirs

Essex and Suffolk Water’s Syleham Water Treatment Works is located in the north-east part of Hartismere in Suffolk. The works supplies water to the north side of Eye and to Fressingfield Water Tower, which in turn supplies approximately 4,000 properties (10,000 customers) throughout a number of villages. It was originally constructed in 1940 and raw […]

Tarbert WTW is located on the edge of Loch Fyne, an inland sea loch, west of the small village of Tarbert in Argyll & Bute. The water treatment works is supplied from the Loch a’ Chaorainn located 5 miles north-west of the treatment works, serving a population of approximately 3,000. To remove the risk of […]

The Thames Tideway Tunnel is a major tunnelling project designed to mitigate the large-scale pollution problem involving the discharge of sewage into the River Thames. The project consists of a 25km long TBM tunnel under the river along with numerous shafts, culverts and connections tunnels constructed using sprayed concrete lined techniques. These will be used […]

The Chelsea Embankment Foreshore (CHEEF) site is one of the eight main sites in the Central Section of the Thames Tideway Tunnel. The site is located within the Royal Borough of Kensington and Chelsea and will allow for the diversion to the main tunnel of approximately 280,000m3 of sewage that currently discharges into the river. […]

Falconbrook Pumping station (FALPS), located in the London Borough of Wandsworth, is the most westerly site on the Thames Tideway Central Section. FALPS is an active pumping station, discharging approximately 700,000m3 of untreated sewage directly into the River Thames each year via six storm pumps. The current station has a combined discharge volume rate of […]

The Thames Tideway Tunnel is a new super sewer that will intercept, store and convey the CSO discharges to Beckton STW for treatment. The project is divided into three main work contracts: West, Central and East. The Ferrovial Construction and Laing O’Rourke joint venture (FLO JV) has been appointed as principal contractor for the Central […]

Tophill Low Water Treatment Works supplies Hull and surrounding areas with clean water abstracted from the River Hull at Hempholme. The lock, which is managed by the Driffield Navigation Trust, is a very busy passage for narrow boats during the spring and summer months. The raw water intake capacity is managed by Yorkshire Water in […]

Uig WTW is located on the west coast of Lewis and provides potable water to the community of around 500 residents, with a significant tourist increase in the summer months. The works are gravity-fed by a high-level loch around 2km from the site. Treated water is then pumped from the water treatment works to a […]

As part of Severn Trent’s ongoing duty to provide public sewers under section 101A of the Water Industry Act 1991 (S101a), nine properties in the hamlet of Upperwood, Matlock Bath, required connection to such a system. These properties were served by private septic tanks, discharged into the limestone aquifer below. Severn Trent appointed Galliford Try […]

Westnewton is a small village about three and a half miles from the Solway coast at Allonby and eight miles west of the market town of Wigton. The wastewater treatment works is situated on a hillside above the village and treats wastewater for 275 population equivalent (PE) from the village and the local area. The […]

Withernsea is located in Yorkshire, approximately 18 miles east of Hull on the Holderness Coast. The area is vulnerable to coastal erosion due to the geology being mainly soft boulder clay. Groynes and sea walls being installed in Bridlington and Hornsea have affected the longshore drift, which has caused Withernsea area beaches to narrow, providing […]

The River Beane is a chalk stream that flows through the county of Hertfordshire and is 30.3km in length from its source at Roe Green. As a tributary of the River Lea, it rises to the south-west of Sandon, in the hills northeast of Stevenage, and joins the Lea at Hartham Common in Hertford. Chalk […]

In October 2020, the finishing touches were undertaken at Woolston Wastewater Treatment Works, completing Southern Water’s £100m scheme to transform its works in Southampton, Hampshire. From the waterside, the new age space-like silver cladding that dominates the site is a much different picture from how the site has looked over the last few years when […]

Wrington village, near the Mendip Hills in north Somerset, lies in the valley of the Congresbury Yeo River, about 20km south-west of the Bristol. Rye Brook flows through Wrington and regularly floods. The floodplain intersects a central corridor through the village, with at least 11 residential properties currently at very significant risk and 42 properties […]

Zouch is a small hamlet situated along the A6006 on the border of Leicestershire and Nottinghamshire and consists of 43 properties that had no access to public sewerage. Due to the canalisation of the River Soar, the hamlet is entirely surrounded by water with the main River Soar to the South and the navigable Zouch […]

As part of the AMP6 Capital Programme, Northumbrian Water Group (NWG) are investing over £1bn in water and wastewater services to provide unrivalled customer service. As part of this programme. Esh-Stantec, a joint venture between Esh Construction and Stantec UK, was commissioned by NWG to investigate the sewer network and to develop a notional solution […]

Anchorsholme Park is located on the coast 4 miles north of Blackpool Tower. The long sea outfall (LSO) project is the third of three phases contributing to improving bathing waters on the Fylde Coast. The objective of the overall scheme is to complete the AMP6 obligations on the Fylde Coast of the ‘moving towards three […]

Anchorsholme Park is located on the coast 4 miles north of Blackpool Tower. The outfall pumping station project is the second of three phases contributing to improving bathing waters on the Fylde coast. The objective of the overall scheme is to complete the AMP5 obligations on the Fylde Coast of the ‘moving towards three spills […]

The next Asset Management Period (AMP7) will introduce a new focus on lowering expenditure, reducing costs to the customer, developing long term solutions and meeting more stringent quality standards. A significant part of meeting these objectives will be ensuring facilities are operating in the most efficient way. Continual advances in technology, including the ongoing growth […]

Ardersier is located on the Moray Firth some 11 miles east of Inverness. The wastewater treatment works serves the town of Ardersier and the surrounding area including Inverness Airport and Fort George Barracks. It currently serves a population of less than 2,000 but there are significant developments planned in the area with a long-term future […]

United Utilities has completed the refurbishment of Aubrey Street Reservoir, a 40Ml underground service reservoir located just outside Everton and serving Liverpool district. Treated water for the 41-year-old reservoir is pumped in from Huntington Water Treatment Works in Chester. The main driver for the project was water quality, which risked being compromised by heavy ingress […]

The North Norfolk coastline has undergone progressive coastal erosion at around the present rate for the last 5,000 years. The cliffs are made of soft deposits, mainly sand and soft clays, which are very vulnerable to erosion. This long-term coastal change puts pressure on communities, infrastructure and business in the coastal zone. The Bacton Gas […]

The North Norfolk coastline has undergone progressive coastal erosion at around the present rate for the last 5,000 years. This long-term coastal change puts pressure on communities, infrastructure and business in the coastal zone. This includes the Bacton Gas Terminal (a piece of nationally critical infrastructure that supplies up to one third of the UK’s […]

Barston Sewage Treatment Works (STW) is one of Severn Trent’s medium sized treatment works. The site is located to the east of Birmingham in the West Midlands. The STW treats foul water for the catchment serving Solihull, Shirley, Knowle and other outlying conurbations. It currently serves a population of 39,741 which will increase to 76,036. […]

Battlefield Brook catchment encompasses farmland, Catshill Marsh (which used to be a Site of Importance for Nature Conservation; SINC), urbanised reaches adjacent to the M5 and Sanders Park; a public amenity facility owned by Bromsgrove District Council. The section of the brook through Sanders Park was lined with concrete in the 1960s. Despite its urbanised […]

Both Blackburn WwTW and Darwen WwTW discharge final and storm effluent to watercourses that are tributaries of the River Darwen, feeding into the River Ribble and ultimately impacting on the bathing waters of the Fylde coast. Following on from the Blackburn and Darwen WwTWs (2017) article and Blackburn and Darwen WwTWs (2018) article, both published […]

The River Blythe is a tributary of the River Tame east of Birmingham – neither of the rivers are at good ecological status. Although reasons for failure under the Water Framework Directive (WFD) are complex, the Environment Agency (EA) identifies barriers to fish and eel passage as part of the problem. Severn Trent has gravity […]

Boston Barrier Tidal Flood Defence Scheme is a £100m project for the Environment Agency, delivered by BMMJV (a joint venture between BAM Nuttall and Mott MacDonald), to reduce the risk of tidal flooding to 14,300 properties and businesses in Boston, Lincolnshire. Boston is located on the east coast of the United Kingdom off The Wash […]

Boughton STW is a medium sized sewage treatment works serving a population equivalent of approximately 13,000 located about 8 miles south-east of Worksop in Nottinghamshire. As part of Severn Trent’s commitment to the Water Framework Directive (WFD) to improve the quality of waterbodies in the region within AMP6, Boughton STW was highlighted to accept a […]

Located in South Ayrshire, Scotland, Bradan Water Treatment Works (WTW) has a capacity of 120 Ml/day, with an output of approximately 70 Ml/day. The existing treatment processes comprise aluminium sulphate coagulation, dissolved air flotation, primary filtration, manganese contactors, orthophosphate dosing, lime and disinfection. The works supplies a large area along the west coast of Scotland, […]

Brantham Raw Water Intake is owned and operated by Essex and Suffolk Water (ESW), part of the Northumbrian Water Group (NWG). The raw water intake, located on the banks of the River Stour north of Colchester, abstracts water from the River Stour where it is transferred under gravity to Brantham Pumping Station. The raw water […]

The Bray Keleher Water Treatment Works (WTW) abstracts and treats a maximum of 45 Ml/d of water from the River Thames and is located on Monkey Island Lane, Bray which is part way between Windsor and Maidenhead. The works is of strategic importance in maintaining supplies to the western region of South East Water (SEW). […]

Since the beginning of the 20th century, raw water has been conveyed 118km from the Elan Valley in Wales, under gravity by aqueduct, to the water treatment works (WTW) in Birmingham for treatment and supply to the population of the city. The aqueduct has been in continuous service for over 100 years and requires some […]

Bryn Cowlyd Water Treatment Works is located south of the village of Dolgarrog in county of Conwy. The works is gravity fed with raw water from Llyn Cowlyd, 350m above and approximately three miles south west of the works, in the Carneddau mountain range in Snowdonia National Park. The old treatment works was commissioned in […]

Completed in 1999, the Cardiff Bay Barrage was designed to regenerate the city waterfront as a vibrant and attractive destination while creating an efficient, two-way control interface between the tidal waters of Cardiff basin and the river estuaries beyond. The challenge of achieving this balance of functionality both sides of the barrage is reflected to […]

During AMP4, Thames Water Utilities Ltd (TWUL) undertook low flow investigations for the Letcombe Brook, in the Wantage area (Oxfordshire). It was determined that the abstraction at Childrey Warren Water Treatment Works (WTW) was having an adverse impact on the river flows and the local environment. A subsequent review of options which included augmentation, works […]

In 2016 Yorkshire Water made the strategic decision to remove all chlorine and sulphur dioxide gas from its Water Treatment Works. This formed part of the Yorkshire Water Safety Improvement Plan as the existing toxic gas disinfection systems were becoming non-compliant with Health and Safety regulations and posed a potential significant risk to employees and […]

Severn Trent (ST) and Hafren Dyfrdwy (HD) have been challenged to meet a large number of new, tight phosphorus permits as a result of the Water Framework Directive (WFD). Historically, only Total-P levels down to 1 mg/l have been enforced by the Environment Agency, but in AMP6 and AMP7 a big step change in expectations […]

The Coleshill Food Waste Anaerobic Digestion Plant processes 48,500 tonnes per annum of food waste collected generally within 30 miles of the site. The site has been in continuous operation since January 2015 when it first received commercial customers. It is currently estimated that this project can deliver 5.5GWh per annum (electrical equivalence) of new […]

Balder Pipe Bridge spans the River Balder in Cotherstone Village near Barnard Castle, County Durham. The bridge abutments occupy private land on either side of the bridge with a public footpath running past the south abutment. The bridge was original designed to carry a single 24” cast iron raw water main which supplies Lartington Water […]

Crankley Point Sewage Treatment Works (STW) is a Severn Trent asset serving Newark-on-Trent, a town in Nottinghamshire with a population of just under 30,000. As part of the £60 million Newark Waste and Water Improvement Project, a new terminal pumping station (TPS) and screening chamber (SC) with outfall to the River Trent was required to […]

Located to the south-east of Nottingham, Severn Trent Water’s Cropwell Bishop Sewage Treatment Works (STW) serves 700 residential premises in the village and a number of local businesses, including the Cropwell Bishop creamery, which contributes a significant phosphorous loading to the catchment. It also receives pumped sewage flows from the adjacent village of Cropwell Butler. […]

Davyhulme Wastewater Treatment Works (WwTW) is United Utilities (UU) largest, serving over 1.3 million customers across Greater Manchester. Built in 1894, it has seen continuous development in wastewater treatment including the invention of the activated sludge process (ASP) by Ardern & Lockett in 1914. Incoming flows from the combined sewer network can reach 30m3/s, the […]

Earl Shilton Sewage Treatment Works (STW) is situated in south west Leicestershire and serves a population equivalent of 11,833 comprised mainly from domestic sources from Earl Shilton and Barwell. There has been a STW in this location since the 1960s and the current process workstream includes preliminary treatment, primary settlement, secondary filtration, secondary settlement and […]

Efficient phosphorus removal for tertiary phases of wastewater treatment works to achieve <0.5mg/l of Total Phosphorus

Finham Sewage Treatment Works (STW) serves a population equivalent of 430,470 for Coventry and its environs. The existing processes include preliminary treatment, primary settlement, a plug flow activated sludge plant (ASP) and final settlement tanks. The site is also a sludge reception centre and has the capability to treat indigenous and imported sludges. The sludge […]

Flass Vale is an area of woodland to the northwest of Durham City Centre that extends north-west to Durham Johnston School and the A167. Flass Burn flows generally north-west to south-east through the Vale. The Burn is an open ditch in the northwest and is culverted in the southeast including through a former bus depot […]

In December 2015, the most severe floods in a generation hit the City of York. As water levels rose to the highest recorded on the River Foss, they entered the main control building at the Foss Barrier, which forms an important part of the city’s flood defences, rendering the facility inoperable. The Foss Barrier and […]

Dŵr Cymru Welsh Water has an extensive network of rural water supply assets in North Wales, with numerous service reservoirs and many kilometers of pipeline. Emergency repairs or mitigation measures have arisen from both freeze-thaw conditions and dry weather over the past few years. During 2018 there were both extremes of cold weather and one […]

Located south of the town of Elgin in the north east of Scotland, Scottish Water’s Glenlatterach WTW is situated in the heart of Speyside, home to some of Scotland’s most beautiful scenery as well as roughly half of all of the whisky distilleries operating in Scotland. Raw water is abstracted from the Glenlatterach Reservoir and […]

Goscote STW is an activated sludge process (ASP) works located near Walsall in the West Midlands which serves a population equivalent (PE) of 120,806 (including trade). The site discharges into the River Tame catchment. Its upgrade was key to meet a tighter environmental permit in AMP6, being 10 mg/l BOD, 1.3 mg/l ammonia and 0.2 […]

The Island of Jersey is situated in the English Channel, 161km south of the English coast. Jersey Water produces the Island’s potable drinking water, supplying over 90% of the Island’s population of 100,000. Jersey Water operates six major reservoirs, one of which is Grands Vaux Reservoir. Originally built in 1951, it is situated in St […]

As part of the ongoing growth of Coventry University, an existing builder’s merchant yard situated off Gulson Road provided a developer with the ideal city centre plot to construct an extensive eight-storey student accommodation building. The brownfield site redevelopment required an existing Severn Trent owned trunk sewer to be diverted prior to the construction work […]

Hazards Green WTW is a South East Water treatment works situated near Ninfield in East Sussex. The works abstracts river water directly from the Wallers Haven and following treatment, supplies a large volume of commercial and domestic customers in the surrounding areas. Prior to this scheme the existing abstraction point had ageing static, coarse trash […]

Keswick and the surrounding area within the Lake District National Park has suffered severely from recent flood events. Most recently, Storm Desmond (2015) resulted in approximately 500 flooded properties and disruption to the A66 trunk road, a key national and strategic link for east/west journeys in the North of England. The A66 is situated close […]