Environmental Engineering in CE
Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in

Oxidation of carbonaceous matter to CO₂
All of these
Nitrification or oxidation of ammonia derived from breakdown of nitrogeneous organic matter to the nitrite and eventually to the nitrate
Coagulation and flocculation of colloids

ANSWER DOWNLOAD EXAMIANS APP