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Nisha Gupta • 2.32K Points
Master

Q. Aerobic biological oxidation ponds used for the purification of polluted water

  • (A) Destroys/removes pathogen from the sewage
  • (B) Is not very effective for non-biodegradable substances (e.g. ABS) containing effluents
  • (C) Destroys/removes pathogen much more effectively if the sewage is chlorinated
  • (D) All (A), (B) & (C)
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