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Piddlehinton Anaerobic Digester

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Bourne Pk Industrial Estate

Piddlehinton

DT2 7TU

United Kingdom

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How is your food waste turned into biogas?

Biogas is reached by Anaerobic Digestion - the following steps are how we achieve this renewable energy source:

1. The local authority organise a rubbish collection service where food waste caddies are collected and loaded onto rubbish trucks in bulk.

2. The food waste material is then taken to Piddlehinton and tipped in a loading bay.

3. The material is fed into a large blender where it is processed.

4. The food waste is mixed with water, to create a liquid which has a porridge like consistency called digestate.

5. The food waste passes through a washing machine which is designed to extract the plastics and metals.

6. The waste is then fed into a holding tank where it is kept for 3 days. This allows for a consistent feed and operation of the plant.

7. The substance is then pumped into the digester & stirred.

8. The mix is kept in this tank for 55 days. A little bit is fed in and a little bit is fed out, every day.

9.From this mix, a gas is produced of which 55% is methane. At this stage, the before mentioned digestate, is heated to 72 degrees for 1 hour, where it is pasteurised.

10.The gas is extracted and pumped through a carbon filter to scrub. After pasteurisation is complete, the digestate material is then exported as an agricultural fertiliser.

11. The gas then passes to the engines which drive the generator. The generator produces electricity.

12. The plant supplies power to the grid, powers the plant and the local mill

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Bourne Pk Industrial Estate

Piddlehinton

DT2 7TU

United Kingdom

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