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The primary treatment of waste water inv...

The primary treatment of waste water involves the removal of

A

Dissolved impurities

B

Stable particles

C

Toxic substances

D

Harmful bacteria

Text Solution

Verified by Experts

The correct Answer is:
B
Primary treatments basically involves physical removal of particles from sewage through: (i) filtration and (ii) sedimentation
These are removed in stages : (i) Initially floating debris is removed by sequential filtration. (ii) Then the grit (soil and pebbles) are removed by sedimentation
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KUMAR PRAKASHAN-MICROBES IN HUMAN WELFARE -SECTION - E SOLUTION OF NCERT EXEMPLAR (MULTIPLE CHOICE QUESTIONS)
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