Activated sludge is used in which sewage treatment step?

Question

Quizplus · Accepted Answer

Activated sludge is used in the secondary treatment step of sewage treatment, which involves the removal of organic matter and nutrients from the wastewater. In this step, the wastewater is mixed with a culture of microorganisms and oxygen, and the resulting activated sludge is then separated from the treated water. This process helps to reduce the amount of organic matter, nitrogen, and phosphorus in the water before it is released back into the environment. Activated sludge is not used in the primary or tertiary treatment steps.

Activated Sludge Is Used in Which Sewage Treatment Step