Milton Keynes, UK

Plant sheet:

Printable pdf

Plant capacity and performance:

• 22,240 metric tonnes DS/year	• Doubling digestion throughput
• 2 x 3,750 m³ digesters	• Class A pasteurized product
• 4-reactor Cambi THP + coolers	• Increased sludge dewaterability
• +1 MWe and process steam	• Importing sludge avoids investments elsewhere

In November 2006 Black & Veatch (then GleesonLtd.) signed a contract with Cambi AS for a
4-reactor Thermal Hydrolysis plant for the pre-treatment of sludge prior to anaerobic digestion
for Cotton Valley sludge treatment centre.

The centre is located at Milton Keynes Wastewater Treatment Works with a population equivalent
of approx. 288,000 but will also import sludge from a similar population equivalent.

The benefits of the Cambi process are:

• More than doubling throughput of the existing digesters and making capacity for the
  next twenty years
• Adding 1 MW of renewable energy
• Improvement of final product to a class A well dewatered product
• Avoidance of further capital expenditure at other sites by importing raw sludge from
  sites with no digestion

See Cambi's film showing some of the plants, including the plant in Cotton Valley.

Article in World Water Magazine "Milton Keynes harnesses"

Where to find the plant:
Cotton Valley WwTW
Tongwell Street,
Pineham,
Milton Keynes,
Buckinghamshire,
MK15 9PA
UK