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2017 Microbes in Human Welfare Sewage treatment – primary treatment Easy Question 25 of 81 in Microbes in Human Welfare

Which of the following in sewage treatment removes suspended solids?

A Tertiary treatment

B Secondary treatment

C Primary treatment

D Sludge treatment

The answer is C.

Solution

Primary treatment physically removes suspended solids.

Primary treatment is a physical process which involves sequential filtration and sedimentation, removing suspended solids.

Concept primary-treatment-solids

Microbes in Human Welfare in past papers

81 questions from this chapter have appeared across 26 exam years.