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25/09/2020 5:58 pm
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Microbes are used in
1. primary treatment of sewage
2. secondary treatment of sewage
3. anaerobic sludge digester
4. production of bioactive molecules
(a) 1, 3 and 4
(b) 1, 2, 3 and 4
(c) 2, 3 and 4
(d) 3 and 4
1 Answer
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25/09/2020 5:59 pm
(c) 2, 3 and 4
Explanation:
Microbes are not used in the primary treatment of sewage which basically involves settling down of sludge through sedimentation.