Effluent precipitation and neutralization vessel and method

Details Effluent precipitation and neutralization vessel and method Effluent precipitation and neutralization vessel and method

1997-04-10

1998-08-11

Hruskoci, Peter A.

Liquid purification or separation

With means to add treating material

Plural distinct separators

210207, 210232, 210244, 210248, 210350, 210451, 210484, 266170, B01D 2100

Patent

active

057923477

ABSTRACT:
A neutral dischargeable effluent is developed by reaction between an acidic, spent photographic fixer liquid and an alkaline, spent photographic developer liquid; the spent fixer liquid contains iron in solution, the iron being introduced in a de-silvering pretreatment of the spent fixer liquid. The two liquids are fed into a treatment chamber and are allowed to react in the treatment chamber to form a neutral liquid and precipitated iron-containing solids; the solids settle in the treatment chamber and the neutral liquid rises upwardly through a synthetic organic polymer fiber filter pad into a discharge chamber above the filter pad; fine sticky particles suspended in the rising neutral liquid are retained by the filter pad; a neutral effluent is discharged from the discharge chamber.

REFERENCES:
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patent: 4039452 (1977-08-01), Fernandez
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patent: 5112479 (1992-05-01), Srimongkolkul
patent: 5132002 (1992-07-01), Woog
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patent: 5470470 (1995-11-01), Leyat
patent: 5688401 (1997-11-01), Bober et al.

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