Proceedings

Thames Water’s Beckton STW in East London is one of Europe’s largest wastewater plants, treating an average flow of 1,150,000 m3/d.

It was identified that one section, ASP4, treating 30% of the site’s flow had issues, despite the fact that with 7.5 m deep aeration tanks and variable speed aeration blowers this should have been the most efficient plant out of the three ASPs on site.

Initial performance was disappointing and after several investigations the decision was taken to modify the ASP under a “spend to save initiative” as energy costs at the site were in the region of £8M per annum. The project was carried out in 2 distinct phases to address both the process issues and reduce energy consumption.