Environmental Engineering in CE
Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by

Floatation & skimming
Chemical coagulation
Ultrafiltration
Centrifugation

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

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

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