Question

activated sludge have the ability to settle quickly so that it can: ​

Answer 1

Answer:

Explanation:

Answer:

                 (a)In the secondary treatment of waste water, when BOD of sewage has reduced, the effluent is passed into setting tank. Here, the bacterial floes settle and the sediment is called activated sludge. A small part of the sludge is used as an inoculums in the aeration tank and the remaining part is passed into large tanks called anaerobic sludge digesters. That's why activated sludge should have the ability to settle quickly.

Answer 2

Answer:

Activated sludge should have the ability to settle quickly so that it can be rapidly pumped back from sedimentation tank to the aeration tank, where it can start the process of decomposition of the organic matter again..

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