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During sewage treatment, biogases are pr...

During sewage treatment, biogases are produced which includes :

A

hydrogensulphide, methane, sulphur dioxide

B

hydrqgensulphide, nitrogen, methane

C

methane, hydrogensulphide, Carbon dioxide

D

methane, oxygen, hydrogensulphide

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  14. What gases are produced in anaerobic sludge digestres

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