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What is the first step in primary sewage treatment plants?

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in Energy Management by (679k points)
What is the first step in primary sewage treatment plants?

(a) Fine screening

(b) Course screening

(c) Chlorination

(d) Primary settling tank

I had been asked this question in an interview.

Question is taken from Effects and Control Measures of Marine Pollution in chapter Environmental Pollution of Energy Management

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The correct choice is (b) Course screening

The explanation is: Sewage treatment is one of the efficient ways to reduce the pollution load happening on marine waters. The primary treatment first undergoes for course screening which then proceeds to other steps like fine screening and all.

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