草浆木质素做混凝剂处理工业废水的试验研究

Researches on using straw pulp lignin as coagulant to treat industrial wastewater

用草浆造纸黑液提取木质素做混凝剂对毛纺厂、印染厂、染料厂废水进行脱色、去除CODCr试验研究,表明草浆木质素是一种有前途的混凝剂,对纺织、印染、染料厂废水中CODCr及色度具有较好的去除效果。该方法以废治废,具有较好的社会效益和经济效益。

Lignin is extracted from straw pulp paper-making black liquor. It is us ed as coagulant for decoloration and CODCr removal in woolen textile factories, printing and dyeing factories and dye-making factories. Experiments show that lignin is a promising coagulant. It has quite good CODCr a nd chromaticity removal efficiency on wastewater from those factories. It not on ly reclaims the useful materials from wastewater in paper-making factories, but is able to be used for other industrial wastewater. Double benefits can be obtai ned.