Sewage treatment is carried out by .........

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(A) Sewage treatment is primarily a biological process that relies on the activity of microorganisms. In the secondary treatment phase,also known as b

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Microbes

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(A) Sewage treatment is primarily a biological process that relies on the activity of microorganisms. In the secondary treatment phase,also known as biological treatment,aerobic and anaerobic microbes are used to decompose the organic matter present in the sewage. These microbes consume the organic waste,thereby reducing the Biological Oxygen Demand $(BOD)$ of the effluent before it is released into water bodies.

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