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What gases are produced in anaerobic sludge digesters:
A
Methane and $CO_2$ only
B
Methane, Hydrogen Sulphide and $CO_2$
C
Methane, Hydrogen Sulphide and $O_2$
D
Hydrogen Sulphide and $CO_2$
Detailed Solution
In anaerobic sludge digesters bacteria digest the sludge and produce a mixture of gases: methane, hydrogen sulphide and carbon dioxide (biogas).