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is the first step of sewage treatment....

_______is the first step of sewage treatment.

A

Precipitation

B

Chlorination

C

Sedimentation

D

Aeration

Text Solution

Verified by Experts

The correct Answer is:
C
Primary treatment in sewage treatment involves physical removal of particles (large and small) from the sewage through filtration and sedimentation. Initially floating debris is removed by sequential filtration. Then the grit (soil and small pebbles) are removed by sedimentation.
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