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.

Similar Questions

Given below are two statements about sewage. Based on them,select the correct option given below.
Statement $I$: The sediment in the settling tank is called floc.
Statement $II$: Sewage is first passed in the grit chamber,then it is screened.

Which organisms grow when air is passed through primary effluent using mechanical agitation?

Select the correct statement from the following.

Which substances present in water are consumed by microorganisms,including bacteria?

When does the $BOD$ level in effluent decrease?

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