Method of treating photographic processing wastes

Details Method of treating photographic processing wastes Method of treating photographic processing wastes

1991-11-29

1994-03-22

Niebling, John

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204131, 204149, 210610, 210611, 210626, 210748, C02F 1461

Patent

active

052961117

ABSTRACT:
A method of treating photographic processing wastes is disclosed. The method comprises (1) mixing a silver-recovery system waste and a development system waste from photographic processing to produce a waste mixture, (2) adding to said waste mixture phosphorus as a nutritive substrate in an amount corresponding to at least 2% based on the COD value of the waste mixture, and (3) subjecting the resulting waste mixture to a bio-oxidation treatment using microflora containing sulfur-oxidizing bacteria. The method enables a continuously treatment of high concentration photographic processing wastes with high efficiency over a long period of time.

REFERENCES:
patent: 4135976 (1979-01-01), Kitajima
patent: 4271013 (1981-06-01), Bhattacharyya
patent: 4936970 (1990-06-01), Weinberg et al.

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