AP EAPCET 6 Sep 2021 Shift 1 Paper

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Question : 40 of 160

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Activated sludge have the ability to settle quickly so that it can ________

Be rapidly pumped back from sedimentation to aeration tank
Absorb pathogenic bacteria present in waste water, while sinking to the bottom of the settling tank
Be discarded and anaerobically digested
Absorb colloidal organic matter

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