Mogden Sewage Treatment Works, Isleworth, London
Posted by: 
AngelPick
N 51° 27.766 W 000° 20.376
30U E 684801 N 5704645
Mogden STW is close to Twickenham Rugby and serves Hounslow and surrounding areas. It is currently undergoing an upgrade and odour control works. The site is currently has a footprint of approx 55 hectacres. There is a footpath that crosses the site.
Waymark Code: WMBBE8
Location: London, United Kingdom
Date Posted: 04/30/2011
Views: 6
Mogden Sewage Treatment Works is one of the largest in the UK. It was built between 1931 and 1935 at a cost of £1.7million and covers an area of 55 hectares. Over half of the power used by the plant is renewable energy that has been generated on site as part of the sewage treatment process.
Around 1.4 million people live in the area served by the works, and some of the wastewater has travelled over 20 miles by the time it reaches Mogden. Many more people also work in this area, so in total the works serves around 1.9 million people.
Odour and mosquitos are big problems here and since the upgrade works started on site it was discovered that a large badger population lives in the west embankment which has caused lots of "environmental" issues.
What is the capacity of the facility?: 790 Mega Litres per day increasing to 1024 Ml/d after upgrade.
Describe the biological treatment technology used.:
Activated Sludge
How are biosolids (sludge) managed?: Digested sludge is then pumped via a pipeline to Iver Sludge Disposal Works located close to junction 4a of the M4, where it is dewatered and transferred to land as fertiliser.
What technology is used for disinfection prior to dicharge of treated water?: Ozone and Chloride
Who is the owner/operator fo the facility?: Thames Water Utilities
How is the facility governed?: Thames Water
What is the website of the WWTP?: [Web Link]
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Visit Instructions:
Please post at least 2 original photographs of the site. We would much rather see photos of the plant itself as opposed to the front office, but we also understand that security and site layout may limit your opportunities.