Scraper bridges take Lancashire WWTWs to new heights
The first stage of a project to integrate two United Utilities wastewater treatment works in Lancashire has been completed, with six new extra-large scraper bridges being the centrepiece of the work.
The Oldham and Royton wastewater treatment works are located about 4 km apart in north east Manchester. They have been in operation for about 100 years and serve a growing population of around 150,000.
Last year a new pipeline was installed between the two sites – using a trenchless laying method to minimise disruption. At Royton, extra storm storage capacity is to be built to better cope with heavy rainfall and disused equipment is being removed or demolished.
Designed, built and manufactured in Dewsbury by A&J Fabtech, the new scraper bridges form part of a £56M scheme that will see primary treatment consolidated at Oldham, while the nearby Royton works will be converted for secondary and tertiary operations. The project is being managed by global engineering company Black & Veatch.
Each giant bridge is 46 metres long and incorporates final settlement tanks, energy dissipating water inlets, glass reinforced plastic (GRP) weir plates and drop boxes. To ensure reliable operation, even under extreme conditions, each bridge has a dual drive system complete with torque protection and loss of rotation sensors, halogen heaters and snow ploughs.
The new equipment and processes at Oldham will remove ammonia from the waste, thus reducing corrosion, increasing the lifespan of the plant, improving local river water quality, and providing better service and value for money. Old structures will be demolished and unused equipment removed prior to re-landscaping of the site.
The bridges were installed in sequence over a period of about six months. They were built at A&J Fabtech’s manufacturing and fabrication facility, which at over 60 metres long and equipped with twin 20 tonne overhead cranes, was easily able to accommodate the bridges.
When complete, the new treatment processes will meet higher standards for wastewater management. They will also breathe renewed life into the River Irk and its tributaries, as the water put back into them will be cleaner, thus helping to improve the natural environment of the river, supporting more wildlife and enhancing the overall ecology.
The project will also include upgrading the power, control and monitoring systems to full automation. This will include remote access, performance monitoring and visualisation of all processes. In future personnel will only need to visit the site for maintenance and repair operations.
A&J Fabtech has over 40 years’ experience of similar work and has previously supplied bridges to over 300 wastewater treatment works.
- Scientists develop machine that transforms dirty water into drinkable supply Testing has begun at UWE Bristol on a portable purification system that could bring clean drinking water to areas of the... Read More >
- Yorkshire Water awards £650m infrastructure frameworks Yorkshire Water has awarded clean and waste infrastructure and customer focused infrastructure frameworks with a combined... Read More >
- IWJS to carry out HS2 enabling works IWJS, a provider of services to wastewater networks and part of M Group Services, has been appointed by SCS JV (Skanska,... Read More >
- Going green at Severn Trent's Minworth STW With a £60 million investment aimed at producing 30 per cent more green energy from its largest sewage treatment works,... Read More >
- New dimensions: How BIM drove Scottish Water's Tullich WTW project With ESD making extensive use of BIM including 4D visualisation tools, Scottish Water has successfully completed a £29... Read More >
- Microplastics: Plastics, plastics everywhere There is growing evidence that microplastics passed on through our wastewater have become widespread in aquatic... Read More >
- Offsite build powers South East Water's £22M treatment works expansion South East Water's expansion of Bray Keleher Water Treatment Works is in full swing, with offsite manufacture aiding... Read More >
- Innovation Zone: Pesticide protection Metaldehyde cannot be removed effectively with standard drinking water treatment processes, but there are technologies... Read More >