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Microbes in Human Welfare — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYMicrobes in Human Welfare1 Mark
MCQ
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.
✓

Answer

  1. Be rapidly pumped back from sedimentation tank to aeration tank.

Activated sludge should have the ability to settle quickly so that it can be rapidly pumped back from sedimentation tank to aeration tank.

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