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(C) Secondary sewage treatment,also known as biological treatment,involves the use of aerobic and anaerobic microorganisms to decompose organic matter

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Biological process

Vedclass · Answer

(C) Secondary sewage treatment,also known as biological treatment,involves the use of aerobic and anaerobic microorganisms to decompose organic matter present in sewage. Primary treatment is a physical process involving filtration and sedimentation. Secondary treatment relies on the metabolic activities of microbes to reduce the Biological Oxygen Demand $(BOD)$ of the effluent. Therefore,it is primarily a biological process.

Secondary sewage treatment is primarily a ......

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