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Question

During sewage treatment, biogases are produced which include :

A
methane, hydrogensulphide, carbon dioxide
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B
methane, oxygen, hydrogensulphide
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C
hydrogensulphide, methane, sulphur dioxide
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D
hydrogensulphide, nitrogen, methane
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Solution

The correct option is A methane, hydrogensulphide, carbon dioxide
During sewage treatment in secondary treatment the biogas is produced in anaerotric sludge digestor have anaerobic bacteria which produce gases like CO2, H2S, CH4

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