Question

What is meant by activated sludge process?

Answer 1

Activated sludge is a thick soft substance used for removing pollutants from waste water by a biological reaction that involves oxygen. The activated sludge is then separated from the treated wastewater and disposed of or returned to the process as needed.

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Answer 2

The activated sludge process is a process which is employed in the treatment of various wastewaters and sewage, using microorganisms to metabolize the suspended organic matter present in it.

Here, sludge refers to the microbial floc that is seeded into the wastewaters which is then agitated for hours in the presence of air supply.