Process for treating photographic effluents by means of ultravio

Details Process for treating photographic effluents by means of ultravio Process for treating photographic effluents by means of ultravio

1994-04-22

1995-08-08

McCarthy, Neil

Liquid purification or separation

Processes

Utilizing electrical or wave energy directly applied to...

210759, C02F 148

Patent

active

054395992

ABSTRACT:
The present invention relates to a process for eliminating the organic compounds from aqueous effluents having a chemical oxygen demand (COD) greater than 5 g/l.
The process consists of treating the effluents with a sufficient quantity of light energy originating from a polychromatic UV source in the presence of H.sub.2 O.sub.2. The quantity of oxygen provided by the hydrogen peroxide expressed in grams per liter is between 0.5 and 3 times the COD of the effluent to be treated and the pH is equal to or less than 10.5.
This process applies to photographic effluents.

REFERENCES:
patent: 4012321 (1977-03-01), Koubek
patent: 4128424 (1978-12-01), Geyken et al.
patent: 4906387 (1990-03-01), Pisani
patent: 5238581 (1993-08-01), Frame et al.
Journal of the American Chemical Society, Chapter 6, 1990, pp. 77-99.

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