NEET Biology question

Secondary (biological) treatment of sewage primarily involves

(A)passing effluent through aeration tanks where aerobic microbes consume organic matter, reducing its BODCorrect
(B)adding chemical bleach to effluent
(C)boiling the effluent at high temperature
(D)freezing the effluent

Answer: (A)

Solution

In secondary treatment, effluent is agitated mechanically and air is passed through it, allowing aerobic microbes to

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Question ID VK-124709