What is the free water above the primary slud | vedclass

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(C) In the process of primary sewage treatment,the sewage is passed through filtration and sedimentation. During sedimentation,all solids that settle

Vedclass · Accepted Answer

Both $(A)$ and $(B)$

Vedclass · Answer

(C) In the process of primary sewage treatment,the sewage is passed through filtration and sedimentation. During sedimentation,all solids that settle form the primary sludge. The supernatant liquid (the free water) that remains above the primary sludge is referred to as the effluent. Therefore,both 'Effluent water' and 'Effluent' refer to the same liquid component in this context.

What is the free water above the primary sludge called?

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