Question

Describe the biogas plant with a neat labelled diagram.

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Solution

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a) The biogas plant consists of concrete tank (10 - 15 ft deep) in which bio-wastes are collected and slurry of dung is fed.
b) A floating cover is placed over the slurry, which keeps on rising as the gas is produced in the tank due to microbial (methanogens) activity.
c) The biogas plant has an outlet, which is connected to a pipe to supply biogas to nearby houses.
d) Used slurry is removed through another outlet and may be used as fertilizer.
e) The biogas thus produced is used for cooking and lighting.

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