关于草浆漂白废水中有机氯化物的研究

Study on the Organic Chlorides in the Effluents of Straw Pulp Bleaching

草浆CEH三段漂中的C段和H段废水毒性很强 ,对发光细菌的抑光率大于 95 %,C段废水对沙门氏菌株TA98和TA1 0 0产生强的致突变性 ,且致突变性的组分具有亲脂性。采用树脂吸附法和活性炭吸附法均可测定漂白废水中有机氯化物的总量 ,草浆厂 (单段漂和CEH三段漂 )漂白浆AOX的生成量在 3～ 5kg/t浆之间。实际测试中 ,活性污泥法对AOX的去除效率在 50 %左右 ,实验表明 ,厌氧法对AOX的去除效率可大于 50 %。

The effluents from the C stage and H stage of CEH straw pulp bleaching process show intensive toxicity with more than 95% of light restraining rate to the luminous bacteria.The effluent from the C stage shows intensive mutagenicity to Salmonella TA98 and TA100 and the components of mutagenicity are dissolvable in the fat.Total organic chlorides of bleaching effluent can be detected by both resin absorption method and activated carbon absorption method.One ton bleached pulp can generate 2～3 kg AOX in the straw pulp mills(one stage bleaching and CEH).It is found in commercial activated sludge treatment of the bleaching effluent that 50% removal rate of AOX is reached and more than 50% removal rate of AOX is reached in anaerobic treatment of lab batch trial.