Question
Write a short note on: Biogas Plant
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Answer
- Biogas plant has a dome like structure built with bricks.
- A slurry is prepared by mixing cow-dung, residual plant materials, vegetable waste etc. with water in the mixing tank.
- From the mixing tank, slurry is fed into digester.
- The digester is a sealed chamber in which there is no oxygen.
- Anaerobic microorganisms (Methanogenic bacteria) decompose or break-down complex compounds of the cow-dung slurry.
- It takes a few days for the decomposition process to complete.
- During the decomposition, gases like methane carbon dioxide hydrogen and hydrogen sulphide, are generated.
- The biogas is stored in the gas-tank above the digester from where it is drawn through pipes for use.
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