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

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

ANSWER DOWNLOAD EXAMIANS APP