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Last reviewed: 5.3.2013 - 4.55pm
We are carrying out a £140m upgrade at Mogden Sewage Treatment Works in west London to extend sewage treatment capacity by 50 per cent.
This will significantly reduce 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 will also help us to meet tighter quality standards for the effluent we discharge.
The†project will involve installing new equipment and upgrading the existing plant. To make space for this, we are reshaping the western embankment, which is within the existing site boundary.
The landscape to the west of the site will be enhanced once complete, benefiting local wildlife.
As well as significantly reducing sewage discharges, these improvements will help reduce odour at the site, as the use of storm tanks will be reduced during heavy rain, and new and existing equipment will be covered over.
Once complete, the extension will generate 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 1.9 million people and covers an area of about 120 acres. We have made allowances for a six per cent population increase until 2021.
Work is due for completion in 2013.