Nominate/Submit Case Studies

Become a Featured Company

Power Plastics Ltd

Power Plastics Ltd, an ISO 9001 certified company, design, manufacture and install a range of flexible roofing systems for process tanks extensively used within the water and sewage industry.

Their roofs are manufactured from tough high quality reinforced PVC materials supported on skeletal frames manufactured from aluminium, galvanised steel or stainless steel. The covers can be designed to be easily removed and refitted within minutes by one or two people without the need for specialist equipment giving unrestricted access to the tank process. This has great benefits in respect to monitoring and maintaining the tank process in addition to the added health safety benefits associated with a confined spaces issues.

The roofs can be used for many purposes with materials being suitable for contact with drinking water and being resistant to corrosive materials.

All their installations are carried out by highly skilled fittings teams which are overseen by project managers, who ensure that all health and safety issues have been considered in addition to providing thorough risk assessments and method statements prior to commencing any work on site.

All designs are structurally proven by independent structural engineers and comply with the latest CDM regulations.

Guildford STW (2024)

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

Guildford STW (2023)

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 […]

Finham Advanced Anaerobic Digestion (2023)

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. […]

Strongford STW - THP & LTP (2022)

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. […]

Davyhulme WwTW Modernisation Project (2019)

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 […]

Deephams STW - A630 Major Upgrade (2018)

Thames Water’s Deephams Sewage Treatment Works (STW) is located in Edmonton, North London and treats a 989,000 population. Three drainage catchment areas of Lea Valley, High Barnet and Tottenham flow to the works, the ninth largest plant in the UK. The original effluent treatment process was built between 1956-1966 and had been updated at various […]

Davyhulme WwTW Modernisation Project (2017)

Davyhulme WwTW is United Utilities’ largest wastewater treatment works, which serves over one million people in Greater Manchester; it has been undergoing a £200 million modernisation process, which started on site in 2015 and is now close to construction completion. The upgrade is required to ensure it complies with tighter discharge consents and the impact […]

Saltend WwTW (2017)

Yorkshire Water’s Saltend WwTW had a history of environmental under-performance which resulted in a significant number of customer complaints due to odour. Between September 2015 and May 2016, £18m of refurbishment and upgrade work was carried out on a fast track basis to improve this performance. Commercial arrangements were adjusted from normal framework conditions to […]

Davyhulme WwTW Modernisation Project (2016)

Located in the North West of England, Davyhulme wastewater treatment works (WwTW) is United Utilities largest works, serving over 1 million customers across Greater Manchester. The works are currently facing several future challenges, namely (i) the tightening of the ammonia (NH3) permit limit from 3mg/l to 1mg/l to comply with the requirements of the Freshwater […]

Liverpool WwTW (2016)

United Utilities’ (UU) flagship sequencing batch reactor (SBR), constructed in the Wellington Dock heritage site is now complete and in successful operation. The £200mn Liverpool WwTW upgrade scheme has delivered a state-of-the-art works to improve the quality of the water in the River Mersey. The project was part of the £3.6 billion invested by United […]

What we do:

Civil Engineering: Design & Construct | Structural Steelwork

Plant & Equipment: Membranes | Odour Control | Sludge Treatment Systems | Tanks & Tank Covers