Color removal from effluent waters

Details Color removal from effluent waters Color removal from effluent waters

C - Chemistry, Metallurgy

02

F

C02F 1/28 (2006.01) C02F 1/56 (2006.01) C02F 9/00 (2006.01)

Patent

CA 2175128

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.

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