BiologyIn the sewage treatment, bacterial flocs are allowed to sediment in a settling tank. This sediment is called as

In the sewage treatment, bacterial flocs are allowed to sediment in a settling tank. This sediment is called as

A
activated sludge
B
primary sludge
C
anaerobic sludge
D
secondary sludge

Solution:

Activated sludge is formed when bacterial flocs settle and sedimented at the bottom of the tank.

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