Color removal from effluent waters

Details Color removal from effluent waters Color removal from effluent waters

1995-06-06

1998-06-16

Hruskoci, Peter A.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210725, 210727, 210734, 210917, 210928, 162189, C02F 156

Patent

active

057664854

ABSTRACT:
Alum process residues (APR) are used to remove colored contaminants from waste waters. In addition, in accordance with the invention, up to 0.1% by weight of alum and up to 5 ppm of a polyelectrolyte polymer is added to improve color removal, turbidity removal and the settling rate. The resultant APR-alum-polymer mixture together with contaminants in the waste water settles rapidly, reducing the costs of the color removal process.

REFERENCES:
patent: 3578587 (1971-05-01), Kemmer
patent: 3627679 (1971-12-01), Fuller
patent: 3901804 (1975-08-01), Ohuchi et al.
patent: 3953330 (1976-04-01), Tonkyn et al.
patent: 3959133 (1976-05-01), Fulton
patent: 4089780 (1978-05-01), Suarz et al.
patent: 4448696 (1984-05-01), White
patent: 4738750 (1988-04-01), Ackel
patent: 4761239 (1988-08-01), Wardell
patent: 4851128 (1989-07-01), Rose
patent: 5200089 (1993-04-01), Siefert et al.
Fuller et al, "Operating experience with an advanced color removal system" Tappi, vol. 59 No. 9, Sep. 1976 pp. 66-70.

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