Question

(c) Describe the role of microorganisms in
(1) cleaning the environment
(ii) sewage treatment
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Answer 1

1. The microorganisms decompose dead organic waste of plants and animals converting them into simple substances.These substances are again used by plants and animals . This is the role of microorganisms in cleaning the environment .
2. Anaerobic bacteria are used in waste water treatment on a normal basis.The main role of this bacteria is to reduce the volume of sludge and to produce the methane gas from it ...Phosphorous removal from waste water is is another benefit of anaerobic microbes used in sewage treatment.

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