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chemical engineering environmental engineering
1. Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in
(A): all (a), (b) and (c).
(B): coagulation and flocculation of colloids.
(C): nitrification or oxidation of ammonia derived from breakdown of nitrogeneous organic matter to the nitrite and eventually to the nitrate.
(D): oxidation of carbonaceous matter to CO2.
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