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Fremgangsmåte for behandling av avlöpsvann fra bleket kjemisk-termomekanisk masse (BCTMP) og kjemisk-termomekanisk masse (CTMP)
Fremgangsmåte for behandling av avlöpsvann fra bleket kjemisk-termomekanisk masse (BCTMP) og kjemisk-termomekanisk masse (CTMP)
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机译:漂白化学热机械浆(BCTMP)和化学热机械浆(CTMP)废水的处理方法
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摘要
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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