Q.

The common gases released in biogas plant and anaerobic sludge digester of sewage treatment plants are

A. CO2                                            B. H2                                  C. H2S                                       D. CH4

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a

A and D 

b

C and D

c

A and C

d

B and C

answer is C.

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Detailed Solution

In anaerobic sludge digester of sewage treatment plant there is release of carbon dioxide, hydrogen sulphide and methane. In Biogas plant there is release of carbon dioxide, hydrogen and methane.

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The common gases released in biogas plant and anaerobic sludge digester of sewage treatment plants areA. CO2                                            B. H2                                  C. H2S                                       D. CH4