Supply Chain - Renewables & Energy Management - Technical Documentation
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Case Studies
- Cardiff & Afan Wastewater Treatment Works (2024)
- Boherbue Wastewater Treatment Plant (2024)
- Goddards Green WwTW (2023)
- Ards North Wastewater Improvement Scheme (2023)
- Sundon Water Treatment Facility (2024)
- Hamilton WwTW (2024)
- Finham Advanced Anaerobic Digestion (2023)
- Dunore Point Energy Storage Project (2024)
(left) Cardiff WwTW and (right) Afan WwTW - Courtesy of Google Earth[/caption]
ADD process diagram - Courtesy of Dŵr Cymru Welsh Water[/caption]
The pipework from the biogas booster pump to the container includes connections for a gas analyser and an in-line gas meter, as well as a safety slam-shut valve. The gas analyser monitors the levels of methane, carbon dioxide, oxygen, and hydrogen sulphide in the biogas. The readings are used by the CHP control system to adjust the engine performance, or to trip on high levels. The in-line gas meter monitors the flow rate of biogas to each CHP engine and the gas slam-shut valve is used to isolate the container in the event of a gas leak or fire alarm.
New biogas booster set install at Cardiff WwTW – courtesy of Morgan Sindall[/caption]
Installation of foam probe and suppression nozzles at Cardiff WwTW - Courtesy of Morgan Sindall[/caption]
Installation of new Endress+Hauser prosonic gas flow meters at Cardiff - Courtesy of Morgan Sindall[/caption]
Google Earth image of Boherbue[/caption]
Inlet works preliminary treatment - Courtesy of Glanua[/caption]
Secondary aeration treatment - Courtesy of Glanua[/caption]
Cloth filter tertiary treatment - Courtesy of Glanua[/caption]
Sludge drying reed beds to process wastewater sludge naturally - Courtesy of Glanua[/caption]
Solar panels for clean, renewable energy - Courtesy of Glanua[/caption]
(left) Precast concrete aeration tanks reduced construction time and safety risks and (right) view of final clarifiers and cloth filters - Courtesy of Glanua[/caption]
Off-site fabrication of steel building, fully assembled as works have been completed (April 2024) - Courtesy of Glanua[/caption]
Odour model emission contours for selected solution - Google Maps[/caption]
Phase 1 odour control unit from ERG (Air Pollution Control) Ltd - Courtesy of Galliford Try[/caption]
(top & bottom left) BIM models showing the THP plant area and (bottom right) Phase 2 THP area looking north-west - Courtesy of Galliford Try[/caption]
Digester feed pumps are used to pump hydrolysed sludge from the flash tank to the digesters. Disinfected process water is added to the suction side of the digester feed pumps to dilute the hydrolysed sludge to achieve the target digester feed sludge dry solids content.
Diluted hydrolysed sludge is combined with recirculated digested sludge before being cooled while passing to the two existing digesters.
The new digested sludge dewatering stage comprises new duty/standby centrifuges and an associated polymer preparation/dosing system. Enhanced treated cake is conveyed to the new cake barn.
There is an existing 800 kW CHP engine. High grade waste heat from the CHP engine exhaust gas is recovered in a new composite steam boiler. Low grade heat is also recovered from the CHP engine jacket cooling water and used to pre-heat the boiler feed water. These heat recovery systems help to minimise the consumption of supplementary fuel (biogas or diesel) required to meet the THP steam demand.
A new final effluent (FE) pumping station supplies cooling water to the sludge coolers. All applications requiring dilution or carrier water are supplied with filtered FE that has been UV-disinfected, ensuring that an enhanced treated cake is produced.
The schematic diagram below shows the process stages with the additional odour reduction measures undertaken in Phase 1 (in green) and the main changes to the sludge treatment process for Phase 2 (in orange).
[caption id="" align="alignnone" width="1200"]
Schematic showing the process stages - Phase 1: Additional odour reduction measures (green) and, Phase 2: The main changes to the sludge treatment process (orange)[/caption]
View looking at Serpecon conveyors and pre-THP silo feed pumps - Courtesy of Galliford Try[/caption]
THP area looking north east - Courtesy of Galliford Try[/caption]
This approach has proved successful throughout the first three years of the current programming AMP7 period (2020-2025) as it affords greater flexibility and control. Wherever possible the existing structure was retained and re-purposed to speed up the construction, and to reduce overall costs and the carbon footprint of the scheme. Before reusing the foundations, detailed in situ and pull-out testing was undertaken. The Cambi B2 unit and associated ancillary equipment are all located within the original cake drying beds.
In parallel to the cake bay works, construction was undertaken within the existing plant to facilitate the installation of the other process units. This required close collaborative working between the contractor and the onsite operations team, to minimise disruption to day-to-day activities and the running of the treatment plant. Throughout the scheme, this close cooperation has continued, ensuring all stakeholders are kept up to date with activities and progress.
Field Systems Design Ltd was engaged by Galliford Try to undertake the detailed design and installation of the complex interconnecting cabling and mechanical piping systems throughout the scheme. This included high voltage cabling and transformer upgrade works, low voltage power cables, signal cables and fibre optic networks. The scope of the mechanical supply included all piping and access arrangements, steam lines and pressure networks.
In total, 48 kilometres of cable, 2.5 kilometres of pipes and associated support systems have been installed. These systems are predominantly placed above ground for ease of future maintenance, and to mitigate the risks of burying equipment within an already congested plant. Collaborative planning and design management have been undertaken between the site team and Galliford Try, to ensure the smooth flow of the mechanical and electrical phase of the works.
Overall, the scheme is now (June 2023) approaching 200,000 hours worked without any lost time or other significant incidents.
[caption id="" align="alignnone" width="1200"]
View looking north-east towards the Saxlund pre-THP cake silo - Courtesy of Galliford Try[/caption]
(top left) BIM model showing the steam boiler system, (top right) the rear of the steam boiler building and emissions stack, (bottom left) the front of the steam boiler building and emissions stack, and (bottom right) the Dunpy boiler package - Courtesy of Galliford Try[/caption]
Bulk excavation - Courtesy of BSG Civil Engineering Ltd[/caption]
Ards North WwTW - Inlet works overview - Courtesy of BSG Civil Engineering Ltd[/caption]
Inlet works side view - Courtesy of BSG Civil Engineering Ltd[/caption]
Screened raw sewage continues to the grit removal plant. The grit settles in a sump underneath the grit paddle. Any grit that settles in this sump is periodically aerated using the grit blower and then removed. From here the grit is transported out of the grit plant by the grit classifier and is deposited into the grit skip. From here it is removed off site for disposal.
After the wastewater has passed through the grit removal plant, flow continues to the FFT pumping station. Here influent is collected, and FFT of 48.2 l/s (summer) & 29.6 l/s (winter) is pumped to the PST flow splitting chamber.
(left) Ards North WwTW - Courtesy of NI Water, and (right) storm tanks tipping bucket installation - Courtesy of BSG Civil Engineering Ltd[/caption]
Aeration plant air manifold control valves and instrumentation - Courtesy of BSG Civil Engineering Ltd[/caption]
RAS/SAS pumping station - Courtesy of BSG Civil Engineering Ltd[/caption]
The thin sludge tank is equipped with an external mixer for the blending of the tank’s contents to feed the sludge thickening plant. A level ultrasonic with low and high-level floats are used in the control of the mixer.
Mixed sludge from the thin sludge tank is pumped to the sludge thickening plant via the two thickeners feed pumps. These pumps are progressive cavity pumps and are arranged in duty/standby configuration. The pumps are VSD controlled to allow the flow to the thickening plant to be controlled.
There are two sludge thickeners, with an individual throughput of 8.3 m3/hr @ 1.3% DS with a discharge of no more than 6%, based on a 5-hour day, 7-days per week operation at 100% of the maximum design load. The thickeners are arranged in a duty/standby configuration with two actuated isolation valves installed on the feed pipework allow this to be fully automated. If one thickener was to develop a fault, the standby thickener can resume operations without manual intervention.
Polyelectrolyte is made up on site to be added to the sludge fed to the sludge thickening plant. The addition of this chemical aids flocculation and makes thickening easier.
This plant is a liquid polymer set. The liquid poly is delivered within IBCs for the makeup process. The set mixes the poly from the IBC with water to a preset concentration rate and is then transferred to the poly storage tank. The duty poly dosing pump doses to the thickener’s sludge feed pipework from here.
Thickened sludge from the sludge thickening plant is transferred to the thick sludge tank. Here thickened sludge is stored for removal off site. A collection tanker removes the tank’s contents off site by coupling to the tank’s Bauer Coupler connector.
[caption id="" align="alignnone" width="1200"]
PST No 1 & control building - Courtesy of BSG Civil Engineering Ltd[/caption]
The tank is equipped with a decant valve arrangement to facilitate settlement of the tank’s contents. The tank is also equipped with a level ultrasonic, low and high-level floats for level status and control of an externally fitted mixer for tank agitation.
The return liquors pumping station receives liquors from the following areas: inlet works drains, thin sludge tank decants and overflow, thick sludge tank decants and overflow, sludge thickening plant bund, FE and washwater drains and odour control plant drains. The station comprises of two fixed speed pumps, which are arranged in duty/standby arrangement. These return liquors to the activated PST splitting chamber.
Low level structures RC concrete installation - Courtesy of BSG Civil Engineering Ltd[/caption]
(left) Ballywhiskin TPS - Courtesy of NI Water, and (right) Carrowdore WwPS - Courtesy of BSG Civil Engineering Ltd[/caption]
(left) Sandycove WwPS and (right) Ballywalter Fowler Way TPS - Courtesy of NI Water[/caption]
NI Water, TetraTech, BSG Civil Engineering Ltd and Farrans along with local elected representatives to mark completion of the £18m Ards North Wastewater Improvement Scheme - Courtesy of NI Water[/caption]
Sundon Reservoir and Water Treatment Facility - Courtesy of Ward & Burke[/caption]
Water quality analysers - Courtesy of Ward & Burke[/caption]
Chemical injection at static mixer - Courtesy of Ward & Burke[/caption]
(top left) Sodium hypochlorite storage and dosing, (top right) sodium hydroxide storage, (bottom left) sodium hydroxide dosing, and (bottom right) point of application cabinets - Courtesy of Ward & Burke[/caption]
Chemical delivery area & carbon dioxide vessels - Courtesy of Ward & Burke[/caption]
New MCC - Courtesy of Ward & Burke[/caption]
Above-ground aeration lanes - Courtesy of Scottish Water Horizons[/caption]
(left) The original flume and (right) container is on site with thrust restraint in progress on the left - Courtesy of Scottish Water Horizons[/caption]
Crossflow turbine from CINK Hydro-Energy k.s. - Courtesy of Scottish Water Horizons[/caption]
(left) Old flume removal and (right) temporary flume in situ - Courtesy of Scottish Water Horizons[/caption]
Bespoke ‘Y’ piece in situ showing bypass and manual isolation valves - Courtesy of Scottish Water Horizons[/caption]
Gas to grid process diagram - Courtesy of Costain[/caption]
Thermal hydrolysis plant process diagram - Courtesy of Costain[/caption]
(left) Inflated gas holder and (right) biogas upgrade unit and carbon storage silos - Courtesy of Costain[/caption]
(left) Sludge transfer pumps and (right) elevated strain press in front of the buffer tanks - Courtesy of Costain[/caption]
Dewatering
The screened sludge is dewatered from approximately 3% to 20% dry solids for transfer to the THP feed silos. 3 (No.) centrifuges work in a duty/duty/standby arrangement and backwash with final effluent (FE) as required.
THP & boilers
The cake is diluted with FE to 16% dry solids and fed into one of the 2 (No.) THP streams which process up to a maximum of 60 tonnes of dry solids per day (tds/day) per stream.
The sludge is heated to around 95°C in pulper to become ‘homogenised’. This sludge is then pumped sequentially through each of the streams 4 (No.) reactors for batch treatment. Steam from the boilers is used to heat the sludge between 50-180°C where it is held at 6-bar pressure to undergo pasteurising hydrolysis for around 30-45 minutes. After hydrolysis, sludge is passed into the flash tank, where the pressure and temperature of the hydrolysed sludge are decreased by flashing steam back to the pulper. The flashtank provides the necessary thermal buffer capacity to release the excess energy contained in the sludge before entering the downstream pumps.
The process kills all pathogens and, in turn, increases the potential gas yield of the sludge.
2 (No.) boilers, procured from Italy, produce 192°C steam from potable water, operate at 12bar and can run on either natural gas imported from the grid or biogas produced from the gas to grid plant. 2 (No.) CHP engines are situated locally to the boilers and the exhaust gas heat is recovered by boilers to optimise performance, these CHP engines can also run on either natural or biogas. The boilers are operated by BOAS accredited operators who were transitioned across from Costain to Severn Trent upon handover.
The warm hydrolysed sludge is then blended with UV FE to reduce the temperature to around 42°C where it is fed back into the digesters via a bank of 8 (No.) sludge return pipes traversing 500m across the site footprint.
[caption id="" align="alignnone" width="1200"]
(top left) Centrifuges, (top right) THP silos, (bottom left) the boiler and (bottom right) the boiler house - Courtesy of Costain[/caption]
UV treatment and sludge cake
A UV plant was constructed to ensure no pathogens were introduced to the sludge post-THP which would normally be present in non-UV treated FE. This ensures that the biosolids product produced by the works is ‘enhanced’ quality and can be sold to farmers to fertilise fields growing a wider range of crops than those which can have ‘standard’ biosolids. A pair of Bollfilters with 25µm strainers from Bollfilter UK Ltd screen the FE prior to UV treatment to ensure that stringent disinfection standards are achieved and to prevent particulates damage to the plant.
Other THP highlights
The THP installation also included a polymer dosing plant, FE and potable break tanks, odour control unit, deep drainage and centrate pump stations with 700m of buried return pipework to head of works, a new FE pump station and a 1200m3 cake bunker.
[caption id="" align="alignnone" width="1200"]
THP reactors - Courtesy of Costain[/caption]
(left) Cake bunker cofferdam and (right) cake bunker - Courtesy of Costain[/caption]
CHP engines- Courtesy of Costain[/caption]
Muck shift in progress - Courtesy of Costain[/caption]
Costain worked collaboratively with Severn Trent to draft plans for the reuse of the muck in the proposed BIA and began the process of sampling and testing the muck. A comprehensive Materials Management Plan approved under the CL:AIRE regulations was produced detailing the proposal. Upon approval from all parties, the muck shift operation began. Costain operated three 30 tonne articulated dumpers (ADTs) to transport the muck across the site. Each dumper averaged 25 trips per day and the full operation was completed in just a little under two weeks.
The overall benefits were:
Finham THP & G2G - Courtesy of Costain[/caption]
(top left) Installation of precast concrete troughs and concrete slabs, (bottom left & top right) installation of BESS cubes, (bottom right) installation of the transformers - Courtesy of GRAHAM Construction[/caption]
(main image) Site overview and (inset) site layout - Courtesy of NI Water and GRAHAM Construction[/caption]
(left) BESS cubes and (right) inside of BESS cubes and gridstack layout - Courtesy of NI Water and GRAHAM Construction[/caption]
Dunore Point BESS completion - Courtesy of NI Water and GRAHAM Construction[/caption]
Dunore Point BESS completion - Courtesy of NI Water and GRAHAM Construction[/caption]
Dunore Point BESS Completion – Courtesy of NI Water and GRAHAMs Construction[/caption]
Mini CS & Company News
- Franklaw Power Recovery Turbine
Franklaw Power Recovery TurbineWhen United Utilities needed to increase the throughput of Franklaw Water Treatment Works in Lancashire they considered energy recovery as part of the overall design. Water is abstracted from the Thirlmere Aqueduct and conducted to the site through underground pipes. The water treatment process required that downstream of the energy recovery plant there should be a pressure of some 8m to drive the water through. Upstream however, there could be no possibility of pressure surge, due to the long pipeline. It was also imperative that water should flow at all times. Lightening strikes could potentially cause the set to trip and with some machine types this would result in either complete or partial shut down of the main. Gilkes were consulted and together with United Utilities engineers arrived at the solution seen in these images. An inlet chamber was always going to be required, this was built above ground and the mains conducted to it. [caption id="" align="alignnone" width="768"]
Courtesy of Gilbert Gilkes & Gordon Ltd[/caption]
A Gilkes Impulse Turbine could then be installed as the power recovery turbine as the plant now facilitated a free discharge machine. The turbine acts as both pressure and flow regulator for the intake works. In the event there is a loss of grid, the flow regulating needle valves, integral in the machines design, remain fixed until such time as mains power is recovered. Pressure continues to be broken by means of directing the needle jets at deflector plates inside the turbine case and the water falls to the intake chamber from where it continues in the normal way to the process plant.
[caption id="" align="alignnone" width="768"]
Courtesy of Gilbert Gilkes & Gordon Ltd[/caption]
Key statistics
- Head: 93 m
- Flow: 1.39 m3/s
- Power: 1000 kW
For more information: Gilbert Gilkes & Gordon | +44 (0)1539 720028 | www.gilkes.com
- Stank Burn Hydro Scheme
Stank Burn Hydro SchemeKEY STATISTICS
- Customer: Callander Community Hydro Ltd
- Net head: 146 m
- Flow: 348 litres/sec
- Turbine type: Gilkes Twin Jet Pelton
- Power (kW): 443 kW
- Dia: 650mm
- Speed: 750rpm
Courtesy of Gilbert Gilkes & Gordon Ltd[/caption]
Scope of supply
- 650mm Twin Jet Pelton, fitted with hydraulic actuators.
- Synchronous Generator.
- Main inlet valve.Hydraulic control module.
- Turbine control and switchgear panel, complete with remote monitoring facility and head level sensors.
- Control and power cabling within turbine powerhouse.
- Installation & commissioning of Gilkes supplied equipment.
- Servicing of Gilkes equipment for 2 years.
Courtesy of Gilbert Gilkes & Gordon Ltd[/caption]
Gilkes also provided full training to community volunteers and are providing on-going support and maintenance to ensure that the maximum generation is achieved from the scheme. Connected directly into the grid, the scheme generator enough power to offset over 300 homes.
For more information: Gilbert Gilkes & Gordon | +44 (0)1539 720028 | www.gilkes.com
- Derby Hydro Power House
Derby Hydro Power HouseScope of works
The purpose of the job was to design and supply temporary and permanent support for a hydro power house and turbine chamber (plus associated inlet channel and tailrace) constructed at the side of an existing weir on the banks of the River Derwent in the centre of Derby.Issues & solutions
The design incorporated a single level of modular 406UC Hydraulic Brace system in conjunction with Larssen piles up to 10m in length, toed in mudstone, covering a perimeter of over 150m. MGF's design allowed early removal of the brace by using a permanent concrete base slab as a low propped cantilever. The design had to take into consideration the complicated construction sequence; and the location of a large crane during installation and removal of the river piles. During the project Balfour Beatty and MGF collaborated to develop the Stairsafe system (the UK's first temporary steel stair system designed specifically for excavations). The system proved a great success in providing rapid and safe access into excavations leading to greater site productivity. The system is now being used throughout the UK on excavations up to 6.5m in depth. [caption id="" align="alignnone" width="1200"]
Courtesy of MGF Ltd[/caption]
Project details
- Sector: Energy & Waste
- Client: Derby County Council
- Contractor: Balfour Beatty
- Consulting engineer: Atkins
- MGF Depot: Midlands - Rugeley
- Product hired: 406UC Hydraulic Brace, 10M Larssen Piles
From early in the tender process MGF have been heavily involved with Balfour Beatty to develop an innovative, cost effective and highly complicated cofferdam design; which helped make Balfour Beatty's tender attractive to the client, Derby City Council. Michael Rummens, Balfour Beatty Site Agent, commented:The verdict
"MGF were brought in at tender stage to assist in the value engineering of the cofferdam and support frames. Upon contract award, MGF's technical team were extremely proactive in producing a workable design in line with the projects requirements. The professional, amenable and expedient attitude continued throughout the process from design, technical support, plant hire and delivery and site assistance."
For more information: MGF Ltd | +44 (0)1942 402700 | www.mgf.co.uk
- Keltie Water Hydro Scheme
Keltie Water Hydro SchemeKEY STATISTICS
- Customer: Drummond Estate
- Turbine type: HCTI Twin Jet Turgo
- Number of turbines: 1
- Power output: 1MW
- Net head: 78m
- Flow: 1626 l/s
- Runner diameter: 25”
- Speed: 600 rpm
Courtesy of Gilbert Gilkes & Gordon Ltd[/caption]
The Turgo is particularly suited to this site with its ability to operate across a flow range of ~1.63m3/s to 0.15m3/s with a nett head of 78m, and while running at 600rpm. In contrast to a slower running vertical machine (which would require a considerably taller building) the simplicity, high speed and lower cost of the Turgo also allowed a lower profile stone built Powerhouse to be sited sensitively, resulting in a scheme that is nicely absorbed by the surrounding landscape.
Scope of supply
- 25” Twin Jet Impulse Turbine
- Main Inlet Valve
- Synchronous Generator
- Lube Oil System
- Control & Switchgear Panel
- Hydraulic Control Module
- Head Level Sensor
- Control & Power Cabling
- Building Services
- Transformer
- Installation & Commissioning
- Servicing for duration of warranty
Courtesy of Gilbert Gilkes & Gordon Ltd[/caption]
Although large by UK standards, the Turgo turbine at Keltie Water shares its advantages with considerably higher output machines abroad. Gilkes has supplied over 1000 Turgos to over 40 countries, with some examples generating in in excess of 7.5MW from a single machine.
Gilkes provide a comprehensive service and maintenance package not only to the Keltie scheme but also schemes across the Trossachs from our recently opened Scottish service centre in Callander, dedicated to serving the Trossachs and surrounding areas.
Gilkes continues to make substantial investments in advancing the Turgo design today - more than 100 years after the company patented the design in 1919.
For more information: Gilbert Gilkes & Gordon | +44 (0)1539 720028 | www.gilkes.com
- Bryn Cowlyd WTW
Bryn Cowlyd WTWBryn Cowlyd Water Treatment Works is in the county of Conwy in Wales and is fed from Llyn Cowlyd, which is the deepest lake in north Wales. The new WTW was commissioned in 2019 and is Welsh Waters flagship Works. Gilkes were approached by Skanska Construction for the detailed design, manufacture, testing and installation, commissioning and training of an energy recovery turbine suitable for flow control at the inlet to the works and to generate renewable energy which would contribute to the on site load required to operate the water treatment works. Welsh Water, Skanska and Gilkes worked together to determine the most suitable turbine and generator. With a net head close to 200m and a flow rate of around 323l/sec the hydrology was suited a Pelton turbine. After monitoring the expected variations, a 750mm single jet Pelton turbine was selected for efficiency and maximum annual energy production. [caption id="" align="alignnone" width="1200"]
Bryn Cowlyd WTW single jet Pelton installation[/caption]
It was an interesting project for Gilkes, as this was the first water treatment works where the entire project was done under BIM (Building Information Management) meaning a full 3D walk though of the treatment stages, energy recovery turbine and final treatment was available during the design stage and also for hazard awareness.
Although the turbine could have been offered in a compact, Streamline format, the machine was offered in a more heavily built design to ensure that noise from the turbine was kept to a minimum.
Gilkes are proud to have supplied further equipment for use on Welsh Water sites, having delivered three machines over the last 10 years.
[caption id="" align="alignnone" width="1200"]
Bryn Cowlyd WTW single jet Pelton installation[/caption]
KEY STATISTICS
- Turbine Type: Single Jet Pelton
- Power: 575kW
- Head: 217 m
- Flow: 323 l/s
- Runner Dia: 750 mm
- Speed: 750 rpm
- Reducing spool & inlet pipework
- Single Jet Pelton turbine
- Induction generator
- Turbine control & switchgear panels
- Operation & maintenance manuals
- Installation & commissioning
- Operator training
- Ongoing service & maintenance
For more information: Gilbert Gilkes & Gordon | +44 (0)1539 720028 | www.gilkes.com
- Ross Priory Pumping Station
Ross Priory Pumping StationRoss Priory Pumping station is a Scottish Water asset situated in West Dunbartonshire. The purpose of the station is to transfer water from Loch Lomond to the WTW at Balmore. The Balmore WTW has the capacity to contribute 360 Ml/d of potable water for the city off Glasgow. The scheme is locally known as the Loch Lomond Water Supply scheme and is on a section of the Scottish Water network known as the cross connection between Strathblane and Balmore WTW.Energy recovery
The Gilkes turbine provides two essential roles, primarily to reduce the pressure in the main and at the same time generate renewable energy for the benefit of Scottish Water. The Gilkes Turgo was selected as it is capable of continuously delivering pre-determined flows even in the event of a loss of grid situation. The Gilkes Turgo provides a proven and robust solution for pressure reduction and power generation in one box. Simply put the turbine is able to operate as a pressure reducing valve (PRV) whether it is functioning as a turbine or not. In a conventional reaction turbine, there is the risk that a grid trip would either require the turbine to shut down or for a complex by-pass arrangement to be in place. This Turgo turbine also avoids the possibility of pressure surge travelling back up the main. Due to the Turgo’s unique design, Gilkes engineers were able to achieve pressure reduction and power generation from a single machine without the use of hydraulics or additional valves. The Turbine is fitted with deflectors that allow water to continue passing through the turbine while at the same time being deflected away from the runner. This allows the machine to achieve a rapid shutdown, regardless of the spear valve (flow regulation) setting. This means that the flow through the turbine is not effected should the unit be required to shut down. The top and bottom deflector plates are mounted on vertical shafts supported by flanged bushes inside the turbine case. The deflectors are independent of each other and each unit is operated by its own electrical actuator mounted on the turbine case. Each deflector actuator has an integrated position transducer which indicates the deflector’s position for the full range of travel to the control system. The Turgo turbine is able to operate continuously as a pressure reducing valve (PRV). This is true whether the machine is operating as a PRV or as a PRV and turbine combined. [caption id="" align="alignnone" width="1200"]
(left) 20" runner and (right) Turgo installation[/caption]
Gilkes Turgo
Gilkes has considerable, worldwide experience of replacing the break pressure valve with a Turgo Impulse Turbine. The use of a Turgo Impulse turbine does not result in the plant using losing any flow control. The turbine may be set so that is primary purpose is to provide the correct value of water at the correct pressure. One of the great advantages of a Turgo Impulse turbine is that it generates within a wide variety of flows.Key statistics
Gilkes' scope of supply was for the supply, installation and commissioning of a Twin Jet Turgo hydro-turbine- Power: 735 kW
- Net Head: 80m
- Flow: 1000 l/s
- Runner Dia: 20”
- Speed: 750 rpm
For more information: Gilbert Gilkes & Gordon | +44 (0)1539 720028 | www.gilkes.com
- Glencorse WTW
Glencorse WTWScottish Water’s £130m flagship investment set just outside the Edinburgh ring road is a 21st century replacement for two now decommissioned WTWs at Alnwickhill and Fairmilehead. Glencourse is fed by the Talla Aqueduct and the water comes from a variety of sources, primarily the Talla, Megget and Fruid Reservoirs. Employing DAF pre-treatment, tertiary sand filtration and final disinfection, the works is able to provide up to 175Ml/d of potable water to the Scottish capital. As with any physical or biological treatment system maintaining a steady flow though the works is paramount to its stable and efficient operation. Due to the varying head and flow characteristics, Black and Veatch (Scottish Waters delivery partner) approached Gilkes for a solution to pressure management at the inlet to the works. Two possibilities were considered including pressure reducing valves (PRV’s) and also a hydro turbine to manage the pressure and provide a steady flow to the DAF cells. [caption id="" align="alignnone" width="1200"]
Glencorse WTW twin jet Turgo installation[/caption]
The Gilkes Turgo was selected as it is capable of continuously delivering pre-determined flows even in the event of a loss of grid situation. The Gilkes Turgo provides a proven and robust solution for pressure reduction and power generation in one box. Simply put the turbine is able to operate as a pressure reducing valve (PRV) whether it is functioning as a turbine or not. In a conventional reaction turbine, there is the risk that a grid trip would either require the turbine to shut down or for a complex by-pass arrangement to be in place. This Turgo turbine also avoids the possibility of pressure surge travelling back up the main.
The energy recovery turbine at Glencorse captures 30-35% of the energy needed to run the WTW. This helping to reduce the sites carbon footprint and dependence on external energy sources.
Due to the Turgo’s unique design, Gilkes engineers were able to achieve pressure reduction and power generation from a single machine without the use of hydraulics or additional valves.
The Turbine is fitted with deflectors that allow water to continue passing through the turbine while at the same time being deflected away from the runner. This allows the machine to achieve a rapid shutdown, regardless of the spear valve (flow regulation) setting. This means that the flow through the turbine is not effected should the unit be required to shut down. The top and bottom deflector plates are mounted on vertical shafts supported by flanged bushes inside the turbine case. The deflectors are independent of each other and each unit is operated by its own electrical actuator mounted on the turbine case. Each deflector actuator has an integrated position transducer which indicates the deflector’s position for the full range of travel to the control system.
[caption id="" align="alignnone" width="1200"]
Glencorse WTW twin jet Turgo installation[/caption]
The Turgo turbine is able to operate continuously as a pressure reducing valve (PRV). This is true whether the machine is operating as a PRV or as a PRV and turbine combined.
Gilkes has considerable, worldwide experience of replacing the break pressure valve with a Turgo Impulse Turbine. The use of a Turgo Impulse turbine does not result in the plant using losing any flow control. The turbine may be set so that is primary purpose is to provide the correct value of water at the correct pressure. One of the great advantages of a Turgo Impulse turbine is that it generates within a wide variety of flows.
[caption id="" align="alignnone" width="1200"]
Glencorse WTW twin jet Turgo installation[/caption]
KEY STATISTICS
- Turbine Type: Twin Jet Turgo
- Power: 253 kW
- Net head: 53 m
- Flow: 550 l/s
- Runner diameter: 20”
- Speed: 600 rpm
SCOPE OF SUPPLY
- Turbine and control system
- Installation
- Commissioning
For more information: Gilbert Gilkes & Gordon | +44 (0)1539 720028 | www.gilkes.com
Jobs
- Senior Civil Engineer (6463)
Senior Civil Engineer (6463)The Opportunity
Following a number of successful frameworks bids across the water industry, and in preparation for the most challenging AMP ever, we are expanding our high-performing engineering teams across the country. In Newcastle, we are excited to have been appointed as a Strategic Technical Partner by Northumbrian Water for the AMP8 period. Stantec provide a range of technical enabling, solution delivery and design services to support Northumbrian Water in achieving its vision to be the leading provider of sustainable water and wastewater services. As part of our long-standing relationship with Northumbrian Water, including the ongoing ESH-Stantec joint venture, we will continue to develop innovative solutions to support their delivery of capital investment across both infrastructure & non-infrastructure projects. In order to continue providing our clients with our expert service, we are looking to recruit a Senior Civil Engineer into our team Newcastle on the picturesque Quayside. You will become part of an international team, redefining our landscape with sustainability, the environment and the communities we serve at the heart of everything we do. As a Senior Civil Engineer, you will work across the entire project lifecycle in asset planning, strategy, concept design, outline design & detailed design. You’ll be responsible for delivering civil engineering solutions, guided by our Principal Engineers & Design Leads, whilst also supporting & mentoring our more junior engineers.You can find out more about our work in the water sector here: Stantec H2O+U - UK.
About You
We are interested in speaking with passionate engineers with design experience within the UK water industry. You’ll hold a degree in Civil Engineering and ideally have achieved Chartered status with a relevant professional body such as ICE or CIWEM. You will have gained experienced delivering community focused projects, whilst working collaboratively with multi-disciplinary teams to delivery innovative solutions. We will support your growth & development through training & project exposure, though prior experience within storm overflows, SUDS, surface water management & sewage treatment would be beneficial.
About Stantec
The Stantec community unites more than 31,000 employees working in over 450 locations across 6 continents. We have been working with our clients and communities in the UK for over 150 years. We plan, design, deliver and manage the development and infrastructure needed to support the creation of sustainable, healthy and prosperous communities. Our teams provide effective and relevant solutions, translating our clients’ vision into valued consents, deliverable plans for projects and programmes, and efficient designs for delivery, based on technical excellence and deep market insights. We deal with today’s challenges, but also keep a fairer, better tomorrow in sight, looking at how we deliver clean growth, support radical changes in our economy and meet the needs of future communities. Stantec provides equal employment opportunities to all qualified employees and applicants for future and current employment and prohibit discrimination on the grounds of race, colour, religion, sex, national origin, age, marital status, genetic information, disability, sexual orientation, gender identity or gender expression. We prohibit discrimination in decisions concerning recruitment, hiring, referral, promotion, compensation, fringe benefits, job training, terminations or any other condition of employment. Stantec is in compliance with laws and regulations and ensures equitable opportunities in all aspects of employment. Building an inspired, inclusive work environment that attracts, supports, and develops world-class talent is a crucial key to our success. If you are excited by this role but worry that your experience doesn’t exactly align, we encourage you to apply. - Civil Engineer - Water (6331)
Civil Engineer - Water (6331)
The opportunity
Do you have a passion for Civil Engineering ? Are you driven to create solutions for the unprecedented climate, environmental, and efficiency challenges facing our clients and the wider community? Then make a real difference and join us at Stantec! We are excited to continue our growth journey in Ireland and Northern Ireland and we have exciting plans for expansion in 2025 and beyond. We look forward to continuing our work with Uisce Eireann on the Engineering Design Services Framework and in Northern Ireland, we are proud to have been appointed to Northern Ireland Water’s IF182 Professional Services Framework. Taoiseach Simon Harris recently opened our new Dublin office, and we have now also moved to a new city center office in Belfast. This exciting pipeline of work, coupled with the scale of opportunity across the AMP8 cycle in the UK means that we seeking Civil Engineers at all levels with experience in the water/wastewater industry to join us. We are flexible with location so the position can be based in Dublin, Belfast or elsewhere. You will have the opportunity to join a dynamic team spread across the UK and Ireland, supporting the delivery of a variety of projects as part of a major capital investment programme.You will play an important role in the team, developing technical solutions & providing advice to our clients. You will provide technical expertise to ensure projects are delivered to cost, schedule & quality standards and work collaboratively amongst multi-disciplinary teams to ensure first class delivery of our projects. You will work closely with external stakeholders & clients to develop long term relationships.About You
You will be Degree qualified (or equivalent) in Civil Engineering or other relevant subject and have some experience of working within the regulated water industry.You will have knowledge of water and wastewater infrastructure/networks and treatment. Due to the nature of upcoming projects, ideally, you will also have experience in areas such as Clean Water and Wastewater Treatment, Trunk Mains and Large Diameter Pipeline Design.Ideally, you’ll have previous consultancy experience in a design role.Most importantly, you’ll embody our values and ethos of client focus and service excellence and have a passion for making a difference in the Water sector.Why Join us?
- Our People Culture: We're a close knit team and very proud of our friendly and collaborative environment
- Growth: We're on an exciting growth journey in Ireland and Northern Ireland - we want you to be part of it!
- Awards: Stantec were awarded the International Consulting Firm of the Year and Best place to work - Large Consulting Firms at the 2024 NCE awards as well as being consistently recognised in the top 10 Corporate Knights most sustainable companies in the world.
- Great Benefits: Competitive salary, pension plan, holidays, free private medical insurance, discounted gym membership and lots more.
- Flexible working arrangements
- Great Projects: We have secured positions on both the Uisce Eireann and NI Water Frameworks and are delivering a wide variety of projects that will make a real difference to our communities
- Industry leading training and development as well as paid for professional subscriptions
About Stantec
The Stantec community unites more than 31,000 employees working in over 450 locations across 6 continents. We have been working with our clients and communities in the UK for over 150 years. We plan, design, deliver and manage the development and infrastructure needed to support the creation of sustainable, healthy and prosperous communities. Our teams provide effective and relevant solutions, translating our clients’ vision into valued consents, deliverable plans for projects and programmes, and efficient designs for delivery, based on technical excellence and deep market insights. We deal with today’s challenges, but also keep a fairer, better tomorrow in sight, looking at how we deliver clean growth, support radical changes in our economy and meet the needs of future communities. Stantec provides equal employment opportunities to all qualified employees and applicants for future and current employment and prohibit discrimination on the grounds of race, colour, religion, sex, national origin, age, marital status, genetic information, disability, sexual orientation, gender identity or gender expression. We prohibit discrimination in decisions concerning recruitment, hiring, referral, promotion, compensation, fringe benefits, job training, terminations or any other condition of employment. Stantec is in compliance with laws and regulations and ensures equitable opportunities in all aspects of employment. Building an inspired, inclusive work environment that attracts, supports, and develops world-class talent is a crucial key to our success. If you are excited by this role but worry that your experience doesn’t exactly align, we encourage you to apply. - Senior Civil Engineer - Water (6286)
Senior Civil Engineer - Water (6286)
The opportunity
Across the entire business, Stantec are building on top of what’s already been a highly successful period of growth. Our strategy within the Water division for 2023 and beyond is creating a number of new exciting opportunities across the business. We partner with the top water clients across the UK, work on some of the largest, most iconic water projects in the industry and we promise to design with community in mind by reducing environmental impacts and improving social impacts. We enable the delivery of sustainable development and infrastructure projects that adapt to and mitigate the effects of climate change. Our Civil Engineers work across the project lifecycle in asset planning / strategy, concept design, outline design and detailed design. We work in a variety of project areas within the water sector, including clean water treatment and networks, wastewater treatment, wastewater networks, flooding, and urban drainage. You can find out more about our work in the water sector here: Stantec H2O+U - UK. You’ll be responsible for the project’s civil engineering design, the leadership of civil engineering teams and will work alongside our overall project design leads to ensure successful project delivery and outcomes for our clients. You will also have access to Stantec’s world-class expertise to help you deliver cutting edge design.About You
You’ll have experience working as a Civil Engineer on projects within sectors such as the water, environment or other related infrastructure sectors. Ideally you will hold Chartered or Incorporated member status with a relevant professional body such as ICE or CIWEM. You’ll have a passion for the water and environment sector and supporting our developing civil engineers. You’ll also be experienced in successful project delivery and working collaboratively with project teams to develop innovative solutions. Finally, you will have experience of working in a client facing role, leading client engagement and collaboration on a regular basis.
About Stantec
The Stantec community unites more than 31,000 employees working in over 450 locations across 6 continents. We have been working with our clients and communities in the UK for over 150 years. We plan, design, deliver and manage the development and infrastructure needed to support the creation of sustainable, healthy and prosperous communities. Our teams provide effective and relevant solutions, translating our clients’ vision into valued consents, deliverable plans for projects and programmes, and efficient designs for delivery, based on technical excellence and deep market insights. We deal with today’s challenges, but also keep a fairer, better tomorrow in sight, looking at how we deliver clean growth, support radical changes in our economy and meet the needs of future communities. Stantec provides equal employment opportunities to all qualified employees and applicants for future and current employment and prohibit discrimination on the grounds of race, colour, religion, sex, national origin, age, marital status, genetic information, disability, sexual orientation, gender identity or gender expression. We prohibit discrimination in decisions concerning recruitment, hiring, referral, promotion, compensation, fringe benefits, job training, terminations or any other condition of employment. Stantec is in compliance with laws and regulations and ensures equitable opportunities in all aspects of employment. Building an inspired, inclusive work environment that attracts, supports, and develops world-class talent is a crucial key to our success. If you are excited by this role but worry that your experience doesn’t exactly align, we encourage you to apply.