In the settling tank,which of the following o | vedclass

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(C) In the process of sewage treatment,the effluent from the primary treatment is passed into large aeration tanks where it is constantly agitated mec

Vedclass · Accepted Answer

Sedimentation of flocs.

Vedclass · Answer

(C) In the process of sewage treatment,the effluent from the primary treatment is passed into large aeration tanks where it is constantly agitated mechanically and air is pumped into it. This allows vigorous growth of useful aerobic microbes into flocs (masses of bacteria associated with fungal filaments to form mesh-like structures). Once the $BOD$ of sewage is reduced significantly,the effluent is then passed into a settling tank where the bacterial 'flocs' are allowed to sediment. This sediment is called activated sludge.

In the settling tank,which of the following occurs?

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