A method of treating bctmp/ctmp wastewater

Details A method of treating bctmp/ctmp wastewater A method of treating bctmp/ctmp wastewater

D - Textiles, Paper

21

C

D21C 11/00 (2006.01) C02F 1/24 (2006.01) C02F 1/54 (2006.01)

Patent

CA 2073419

A method of treating BCTMP/CTMP wastewater to improve retention and purification of cellulose fiber suspension and clarification of the BCTMP/CTMP wastewater which comprises the addition of a cationic, water soluble coagulant having a molecular weight less than 15,000,000 in an amount of about 1 to about 300 ppm; and a high molecular weight flocculant selected from the group consisting of: nonionic polymers having a molecular weight in the range between about 500,000 to about 30,000,000, low charge cationic polymers having a molecular weight in the range between about 5,000,000 to about 30,000,000, and low charge anionic polymers having a molecular weight in the range between about 5,000,000 to about 30,000,000, in an amount of about 0.1 to about 100 ppm.

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