Waste water process

Details Waste water process Waste water process

C - Chemistry, Metallurgy

02

F

362/12

C02F 1/72 (2006.01) C02F 1/58 (2006.01) C02F 3/02 (2006.01) C02F 9/00 (2006.01)

Patent

CA 1113617

WASTE WATER PROCESS (D#74,366-F) ABSTRACT A method is provided for the treatment of a waste water stream characterized by having toxic and corrosive properties due to the presence of a cyanides formates and a halide of a metal or ammonia comprising adding a ferrous ion to said waste water to convert the cyanides to iron cyanides, adding a base to said waste water until the pH of said waste water is adjusted to the range from about 9 to 11 to precipitate a sludge contain- ing said iron cyanides, feeding said waste water to a biological reactor to convert said formates to carbon dioxide and a biological residue and recovering an environmentally upgraded waste water stream from said biological reactor. I

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