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Biology · PYQ NEET UG 2020

हिन्दी

Which of the following is put into Anaerobic sludge digester for further sewage treatment?

  1. Floating debris
  2. Effluents of primary treatment
  3. Activated sludge
  4. Primary sludge

Correct answer · Option 3

Activated sludge

Explanation

A small part of the activated sludge is pumped back into the aeration tank while the major part of the sludge is pumped into anaerobic sludge digesters.
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