Waste water process

Details Waste water process Waste water process

1977-10-31

1980-07-08

Hart, Charles N.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 18, 210 45, 210 48, 210 50, 210 56, 210 56, 210 53, 210DIG31, 423236, 423367, C02B 120, C02C 502, C02C 510

Patent

active

042116465

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 containing 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.

REFERENCES:
patent: 1604565 (1926-10-01), Coulier
patent: 2459464 (1949-01-01), Smith
patent: 2788259 (1957-04-01), Van Wirt et al.
patent: 3647686 (1972-03-01), Gunnarsson
patent: 3846293 (1974-11-01), Campbell
patent: 3931007 (1976-01-01), Sugano et al.

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