Six extra-large scraper bridges, are to be designed, manufactured and installed by A&J Fabtech, at the Oldham wastewater treatment works, which is being upgraded in a project that will integrate its operations with those of the nearby Royton works.
Each bridge will be 46m long and fitted in final settlement tanks, incorporate stainless steel underwater energy dissipating inlets, Glass Reinforced Plastic (GRP) weir plates and drop boxes. They will each have a synchronised dual drive complete with torque protection and loss of rotation sensors.
Halogen heaters and snow ploughs will ensure operation even in extreme weather conditions. The project is being carried out with Black & Veatch and forms part of the £56m upgrades at Oldham and Royton wastewater treatment works for United Utilities. The Oldham and Royton wastewater treatment works are located about 4km apart in north east Manchester.
The integration strategy will see the cessation of full treatment at Royton and transfer flow to Oldham, where new secondary and tertiary treatment facilities are being built. The project includes meeting new final effluent discharge standards and reducing storm sewage discharges into the River Irk and its tributaries.
Both sites will also have new storm water storage facilities. In addition, there will be an upgrade to the power, control and monitoring systems to allow remote access, performance monitoring and visualisation of all process units at both sites. This will allow fully automatic operation and limit the need for manual intervention for scheduled and reactive maintenance.
The new plant will be fully compliant with United Utilities’ Future Concept of Operations Policy which requires visualisation, performance information and remote intervention of all process units.
The first bridge is due to be installed in October 2016; the rest will follow with completion scheduled for March 2017.