Q 1712034830.     Activated sludge should have the ability to settle quickly so that it can

NCERT Exemplar 10/17/mcq
A

be rapidly pumped back from sedimentation tank to aeration tank

B

absorb pathogenic bacteria present in waste water while sinking to the bottom of the settling tank

C

be discarded and anaerobically digested

D

absorb colloidal organic matter

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