Process for the purification of contaminated water

Details Process for the purification of contaminated water Process for the purification of contaminated water

1977-10-04

1979-08-07

Hart, Charles N.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

204149, 210 37R, 210 38R, 210 47, 210 50, 210 60, 210 961, C02B 116, C02B 120

Patent

active

041637160

ABSTRACT:
The invention concerns a process for the purification of acid dyehouse effluent from a dyeing process, which is contaminated with coloured substances and heavy metal ions. After removal of fibers, the effluent is subjected to ion exchange to remove surface active agents and is then subjected to electrolysis with an iron cathode. Ferrous and ferric hydroxide is formed and the ferrous and ferric hydroxide together with the colored substances and heavy metal ions are removed from the effluent liquid. The liquid which remains is recycled to the dyehouse.

REFERENCES:
patent: 2667454 (1954-01-01), Roller
patent: 3419493 (1968-12-01), Pangle
patent: 3531463 (1970-09-01), Gustafson
patent: 3617559 (1971-11-01), Cywin
patent: 3677940 (1972-07-01), Fujimoto et al.
patent: 3803030 (1974-04-01), Montanaro et al.
patent: 3853758 (1974-12-01), Hurwitz et al.
patent: 3915820 (1975-10-01), Ito et al.
Porges, R. et al., Sewage Works Journal, "Chemical Precipitation of Textile Waste," pp. 828-863, 1939.

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