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Q.

Which of the following organisms are inoculated into sewage treatment plants?

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a

Algae

b

Anaerobic microorganisms

c

Aerobic microorganisms

d

Fungi

answer is A.

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Detailed Solution

  • Sewage contains a huge amount of organic matter that is toxic. Microorganisms are widely used in sewage treatment plants for removing this toxic organic matter. 
  • For this aerobic microorganisms are inoculated into sewage treatment plants that utilize organic components of the sewage and reduce its toxicity. This is measured by BOD (Biological oxygen demand). 
  • After the biological treatment, sludge is pumped from the treatment plant into a large tank for further processing and digestion of sludge.
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