Activated sludge should have the ability to settle quickly so that it can [NCERT Pg. No…
Biology · NEET · NTA Exams — Microbes in Human Welfare
Activated sludge should have the ability to settle quickly so that it can [NCERT Pg. No. 154]
- Be rapidly pumped back from sedimentation tank 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
Answer
(A) Be rapidly pumped back from sedimentation tank to aeration tank
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