System for treatment of photographic wastewater effluent

Details System for treatment of photographic wastewater effluent System for treatment of photographic wastewater effluent

1992-07-31

1994-01-11

Valentine, Donald R.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204272, 204284, 204DIG13, C25B 900, C25C 700

Patent

active

052777758

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 for 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: 4046655 (1977-09-01), Itai et al.
patent: 4268619 (1981-05-01), Dunagan
patent: 4302318 (1981-11-01), Mock
patent: 4420401 (1983-12-01), Kretas et al.
patent: 4834850 (1989-05-01), de Nora et al.
patent: 4911804 (1990-03-01), Dickson
patent: 5091070 (1992-02-01), Bauer et al.
International Search Report for PCT appln. No. PCT/CA92/00395.

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