Question

How is activated sludge produced during sewage treatment?

Answer 1

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The effluent formed from the primarytreatment by filtration and sedimentation is passed to aeration tank for secondary treatment. ... When BOD and hence pollution is reduced,effluent is passed into a settling tank. Here, flocs settle down and it is known as Activated Sludge.

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Answer 2

The effluent formed from the primarytreatment by filtration and sedimentation is passed to aeration tank for secondary treatment. ... When BOD and hence pollution is reduced,effluent is passed into a settling tank. Here, flocs settle down and it is known as Activated Sludge.