Biochemical process for purifying contaminated water

C - Chemistry – Metallurgy – 02 – F

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C02F 3/30 (2006.01) B01D 53/22 (2006.01) B01D 53/84 (2006.01) C02F 3/10 (2006.01) C02F 3/12 (2006.01) C02F 3/20 (2006.01)

Patent

CA 1177977

ABSTRACT BIOCHEMICAL PROCESS FOR PURIFYING CONTAMINATED WATER A process for treating contaminated water containing BOD sources and nitrogen sources, which comprises supplying oxygen or oxygen-containing gas from one side of a gas- permeable membrane to grow microorganisms including aerobic bacteria and anaerobic bacteria on the other side of the gas-permeable membrane, and performing decomposition of the BOD sources and nitrification and denitrification simultaneously by the action of these microorganisms; Especially good results are obtained when a membrane composed of porous hollow fibers is used as the gas-permeable membrane.

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