Electrolytic process for treatment of photographic wastewater ef

Details Electrolytic process for treatment of photographic wastewater ef Electrolytic process for treatment of photographic wastewater ef

1991-09-11

1992-11-03

Niebling, John

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204105R, 204109, 204112, 204131, 204149, C25B 100, C25B 300, C25C 100

Patent

active

051604175

ABSTRACT:
There is disclosed a system for treatment of wastewater effluent from a photographic process which produces a developer effluent, a bleach effluent and a fixer effluent. The system comprises a developer treatment zone, a bleach treatment zone and a fixer treatment zone. Within each zone, there are provided defined means of pH adjustment of the effluent and a defined electrolytic cell of electrolysis of the effluent. A process for conducting the system is also provided. The invention may be advantageously used to reduce the concentration of or eliminated chemicals contained in the effluent.

REFERENCES:
patent: 3953313 (1976-04-01), Levenson
patent: 4028212 (1977-06-01), Bowen et al.
patent: 4268619 (1981-05-01), Dunagan
patent: 4302318 (1981-11-01), Mock
patent: 4834850 (1989-05-01), de Nora et al.

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