Identify the wrong statement regarding the pr | vedclass

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(C) In sewage treatment,primary treatment involves physical removal of particles through filtration and sedimentation. Secondary treatment is a biolog

Vedclass · Accepted Answer

The $BOD$ of effluent increases after secondary treatment.

Vedclass · Answer

(C) In sewage treatment,primary treatment involves physical removal of particles through filtration and sedimentation. Secondary treatment is a biological process where aerobic microbes consume organic matter,which significantly reduces the Biochemical Oxygen Demand $(BOD)$ of the effluent. Therefore,the statement that $BOD$ increases after secondary treatment is incorrect. Additionally,anaerobic sludge digesters are typically used for the treatment of sludge collected from primary and secondary processes,not as a standard tertiary treatment step.

Identify the wrong statement regarding the process in sewage treatment.

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