| 摘要 |
FIELD: treatment facilities. ^ SUBSTANCE: invention relates to the methods of removing technical lignins such as lignosulphonates from effluent water and can be used in pulp production. Method of treating lignin-containing pulp and paper industry effluent water containing lignosulphonates, reducing substances (RS) - polysaccharides and other pulp production components implies their precipitation as compounds with natural aminopolysaccharide - chitosan. Chitosan with molecular weight of 300-500 kDa is used in the invention. The weight relation chitosan:lignosulphonate amounts to 0.2-0.3:1 and the precipitation temperature is equal to 22-90C. ^ EFFECT: method provides for 80-99% extraction of lignosulphonates and 60% extraction of reducing substances with the initial concentration of the lignosulphonates in the solution being equal to 2,5-100 g/L, pH=1-6, RS=4,25%. ^ 1 dwg, 2 tbl, 7 ex |
