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Question
Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in____________________?
Options:
A .  Coagulation and flocculation of colloids
B .  Oxidation of carbonaceous matter to CO2
C .  Nitrification or oxidation of ammonia derived from breakdown of nitrogenous organic matter to the nitrite and eventually to the nitrate
D .  All A., B. and C.
Answer: Option D
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
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