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Biology

NEET BiologyClass 12Sewage treatmentMediumAssertion–Reason

Question 5 of 10

Read the Assertion and the Reason about the secondary stage of sewage treatment, and choose the correct option.

  • Assertion (A): The biological treatment of effluent in aeration tanks greatly reduces its BOD.
  • Reason (R): Vigorous aeration lets aerobic microbes grow as flocs that consume much of the organic matter.

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