The technology of managing the pollution of black-liquor of straw pulping in paper-making is a hot point in China's water pollution controlling research.
草浆造纸黑液的污染治理技术是国内水污染控制研究的热点，但由于草浆黑液的特点不同于木浆造纸废水，因而其治理成本较大。
But lignin becomes one of the main pollution sources, coming from waste water in the paper-making factory.
它是造纸厂排出的废液中的主要成分，是主要的水污染源之一。
Cationic - type polyacrylamide is one of the polymers which have the widest USES in water treatment and paper making industries, whose capacity is over 50% of polyacrylamide products abroad.
国外阳离子型聚丙烯酰胺的产量占聚丙烯酰胺产品的50%以上，该产品是水处理及造纸行业中用途最广泛的高分子聚合物之一。
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