Technology for treating waste liquide from paper-making by waste paper

The treatment process of sewage produced by using waste paper to make paper includes: (1) primary precipitation: utilizing self-weight of impurity in the sewage to precipitate and separate out granular or colloidal organic materials; (2). flocculation precipitation; adding flocculant in coagulatory settler to accelerate precipitation of granular impurity; (3) coagulatory precipitation; adding high-effective coagulating agent to remove above 890% of suspended matter; (4). filtering: using quartz sand and PP cotton to filter the sewage which is undergone the process of three precipitation treatment; (5) adsorption; using active carbon to remove the impurity with small molecular structure; and (6) fine filtration; using hollow fibre to make filtration.