Wanlip AD

The plant at Wanlip was constructed in 2005 as part of the infrastructure developed for the Leicester City Council 25-year PFI contract.

The primary feedstock for the plant comes from the Leicester mechanical waste treatment facility at Hoods Close, Leicester. Household waste is mechanically processed and then screened and sorted to separate food waste and metals, produce solid recovered fuel and residual materials for disposal.

The extracted food waste is mixed with water to create a slurry, and is then screened and filtered to remove contaminants including paper, fabrics, glass and grit. The liquid fraction is then discharged into 400m3 digestion tanks where it is retained for 18 – 20 days at about 38°C in the absence of oxygen. The resultant biogas is extracted and used to generate 1.5MW of electricity. The digestate is dewatered and used as a soil conditioner/fertiliser.

The plant has a design capacity of 40,000 tonnes per annum. Improvements to the operating efficiency of the plant have increased this capacity and the plant has been modified to receive bulk and source segregated food wastes. It has also recently been approved by Animal Health for the receipt of Cat 3 animal by-products.

Man walking through industrial plant

Biogas is extracted and used to generate 1.5MW of electricity