Method for treating photographic processing fluids prior to sewe

Details Method for treating photographic processing fluids prior to sewe Method for treating photographic processing fluids prior to sewe

1977-09-22

1978-12-05

Braun, Fred L.

Gas separation: apparatus

Electric field separation apparatus

Including gas flow distribution means

96 50A, 96 61R, 210 60, G03D 302, G03C 524, C02B 118

Patent

active

041284240

ABSTRACT:
In a method for separately treating the used developing fluid from the remaining used photographic processing fluids prior to feeding the used fluids to a sewer system. The used developing fluid is continually withdrawn from the developing tank and chemically neutralized in a collecting vessel by a chemical oxidizing agent such as acetic acid or hydrogen peroxide prior to feeding the fluid to a sewer system. The method includes the continued withdrawal of spent fixer fluid to a silver recovery device and recirculation of the regenerated fixer fluid to the fixer tank.

REFERENCES:
patent: 1319026 (1919-10-01), Ybarrondo
patent: 1656522 (1928-01-01), Josepho
patent: 1962306 (1934-06-01), Hickman
patent: 2073664 (1937-03-01), Weisberg et al.
patent: 2419853 (1947-04-01), Pask
patent: 3528358 (1970-09-01), Pickard
patent: 3712204 (1973-01-01), Aelterman
patent: 3733994 (1973-05-01), Armstrong et al.
patent: 3832730 (1974-08-01), Geyken et al.
West, L. E., "In Support of Clean Water-Disposing of Effluents from Film Processing," Kodak pub. J-44, pp. 1-11, Oct. 1974 and earlier.
Dagon, T. J., "The Biological Treatment of Photographic Processing Effluents," Kodak pub. J-46, pp. 1-20, Sep. 1972.

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