First slide

Microbes in Sewage Treatment

Question

After a significant reduction in BOD of wastewater, it is passed into a setting thank where bacterial flocks are allowed to sediment. This sediment is called :

Easy

A

Primary sludge
B

Activated sludge
C

Effluent
D

Grit

Solution

Flocs are activated sludge sedimented in secondary settling tank after the passage from aeration tank.

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