| 摘要 |
paper-and-pulp industry. SUBSTANCE: invention, in particular, relates to production of defibering, refiner, thermomechanical, and chemical-thermomechanical pulp. To waste water are added coagulator aluminum chloride hydroxide (aluminum oxide-to-chlorine ratio 0.71-0.92), then clump from flotation traps of intrashop purification of excess cardboard production return water, and then remaining amount of coagulator. 30- 180 s after the second addition of coagulator, waste water is supplemented by polyacrylamide flocculant, in particular anionic polyacrylamide with molecular weight (9-15) 106. EFFECT: increased degree of purification. 2 cl, 3 ex
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