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Activated sludge should have the ability...

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

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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The correct Answer is:
A
Be rapidly pumped back from sedimentation tank to aeration tank
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MODERN PUBLICATION-MICROBES IN HUMAN WELFARE-NCERT FILE EXEMPLAR PROBLEMS (MULTIPLE CHOICE QUESTIONS)
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