Mogden Sewage Treatment Works
We have carried out a £140m upgrade at Mogden Sewage Treatment Works in west London to extend sewage treatment capacity by 50 per cent.
This has significantly reduced the amount of storm sewage that overflows into the tidal stretches of the River Thames when the site becomes overloaded during heavy rainfall.
The improvements also help us meet tighter quality standards for the effluent we discharge.
The project involved installing new equipment and upgrading the existing plant. To make space for this, we reshaped the western embankment, inside the existing site boundary.
The landscape to the west of the site has been enhanced, benefiting local wildlife.
As well as significantly reducing sewage discharges, these improvements are helping to reduce odour at the site, as the use of storm tanks has been reduced during heavy rain, and new and existing equipment has been covered over.
The extension generates up to 40 per cent of its power requirements from renewable energy generated from 'poo power' - where we generate electricity by burning methane derived from sewage.
The Mogden site, in Isleworth, currently serves 2.1 million people and covers an area of about 55 hectares. We have made allowances for a six per cent population increase until 2021.
The work was completed in March 2013.