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प्रश्न
Activated sludge should have the ability to settle quickly so that it can ______.
पर्याय
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
उत्तर
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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