THE MAGAZINE FOR THE DRAINAGE, WATER & WASTEWATER INDUSTRIES
CASE STUDIES
important to improve the settlement and filtration processes and to optimise biological treatment to ensure the discharged water has a balanced pH. Normally, maturation of the biofilm – which takes 10–12 weeks – can start only when all this is done.
“With these additional assets, dissolved solids have longer to settle and the site can meet the tightened regulatory rules around phosphorous and ammonia.”
Along with the new processes, the expanded site required new pipework, ducting, pumping stations and even footpaths and kerbing. MWH Treatment was supported in this by a host of fellow RSK companies; CR Civil Engineering and Hollywood Civil Engineering managed all civil works, including over 3 km of piping across the site, a 16-way ducting system throughout the whole site for electrical feeds and various formed reinforced concrete works such as footpaths, loading bays, plinths and kiosk bases. Nicholas O’Dwyer handled the design, and RSK Geosciences and Ian Farmer Associates handled ground investigations and geotechnical assessments and services. More than 50 people have been working on the site at any one time over the last 12 months. While the new assets are complete, works on-site are expected to continue until the summer to improve the overall performance of the site, Akram said.
Severn Trent Water spokesperson Sophie Tunnicliff said: “The investment at Burntwood Sewage Treatment Works will ensure that we can comply with the new environmental permit conditions that have been set by the Environment Agency. Increasing primary settlement capacity supports downstream biological treatment processes, improving the performance of our existing biological filters, which are now augmented by the new ammonia removal plant. With the new chemical dosing and tertiary solids removal plant, we will be able to reduce the phosphorous being discharged to the watercourse, giving local people a significantly improved natural environment.”
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March 2025 |
19
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