Class 12 · Microbes in Human Welfare

Primary vs Secondary Sewage Treatment — NEET Biology

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What is the key difference between primary and secondary sewage treatment?

NCERT Biology · Class 12 · Chapter 8 · Paragraph 45
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Assertion (A): Secondary sewage treatment involves mechanical agitation to promote microbial activity. Reason (R): Primary effluent is passed into large settling tanks where it is constantly agitated mechanically.

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