EXPANSION of the Mogden Sewage Treatment Works is coming to an end after three years of upgrading to ensure a cleaner Thames.
Thames Water embarked on the £140million project in 2011 which will enable the Isleworth site - which serves 1.9 million people - to effectively treat over 50 per cent more sewage in order to cope with heavy rainfall.
It will reduce the amount of storm sewage which overflows into the River Thames when there is too much rain for the old site to deal with and will make sure what goes into the Thames is much cleaner.
After three years of installing new equipment, Thames Water are now testing it to ensure it all works effectively and it will be completely ready in a few months.
Following a drop in session with residents last Thursday (February 28), they will start to plant grass, woodland and a meadow with nesting boxes for bats and birds to encouarge wildlife so the area will look more pleasant.
The reduction of sewage discharges will also help reduce odour from the works which is a welcome addition for people living around the site.
However, the improvement works will also mean an increase in the amount of power it uses. To ensure this does not impact too much on the environment, up to 40 per cent of the power used at Mogden will come from renewable energy generated by burning methane which comes from the sewage.
Adrian Jack, contracts manager at Mogden, said: "We will be using the methane from the tanks to power part of the works so not only are we using renewable energy but we are taking the methane out of the end release."
Residents surrounding Mogden have been very much involved in the entire upgrade process, with monthly drop in sessions throughout the three years at Twickenham Stadium where they can ask experts about what is happening and voice any concerns. A quarterly newsletter also informs 10,000 people in the area about the works.
The project is just one out of five along the entire Thames to ensure a cleaner river. The other four are located in Crosness near Dartford, Beckton, in Barking, Riverside near Dagenham and Long Reach near the Dartford Tunnel.
Thames Water is also planning construction of the Lee Tunnel and the Thames Tideway Tunnel which will both prevent sewage mixed with rainwater overflowing into the River Lee and Thames.