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CGP EDU Academic Team
Published on: August 26, 2026
Methanogenic bacteria are not found in:
Text Solution
Verified by ExpertsThe correct answer is:
D
(d) Methanogenic bacteria (that produce methane) are not found in activated sludge. The microbes present in the activated sludge are aerobic bacteria that grow rapidly and form flocs.
During secondary treatment of wastewater, it is in the digesters where other kinds of bacteria which grow anaerobically, digest the bacteria and the fungi in the sludge producing mixture of gases such as methane, hydrogen sulphide and 
which form the biogas.
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