Question

46. Which of the following in sewage treatment removessuspended solids?
(1) Tertiary treatment (2) Secondary treatment
(3) Primary treatment (4) Sludge treatment

Answer 1

Answer:

3

Primary Treatment

Explanation:

Primary treatment consists of temporarily holding the sewage in a quiescent basin where heavy solids can settle to the bottom while oil, grease and lighter solids float to the surface. The settled and floating materials are removed and the remaining liquid may be discharged or subjected to secondary treatment.

Answer 2

Answer:

the above answer is correct

Explanation:

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