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Microbes in Human Welfare — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYMicrobes in Human Welfare1 Mark
MCQ
Activated sludge should have the ability to settle quickly so that it can?
  • ✓
    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.
✓

Answer

Correct option: A.
Be rapidly pumped back from sedimentation tank to aeration tank

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