A) Primary Sludge
B) Secondary Sludge
C) Activated Sludge
D) Inactivated Sludge
Correct Answer: C
Solution :
Once the BOD of sewage or waste water is reduced significantly, the effluent is then passed into a settling tank where the bacterial 'floes' are allowed to segment. This sediment is called activated sludge.You need to login to perform this action.
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