壳聚糖混凝处理丁腈橡胶废水的实验研究
Research of coagulation of NBR wastewater with chitosan
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摘要: 利用壳聚糖作混凝剂处理丁腈橡胶废水。对投加量、pH、搅拌速率和沉降时间四因素进行L9(34)正交实验,确定壳聚糖混凝处理丁腈橡胶废水的最佳实验条件。结果表明,壳聚糖投加量为100 mg/L, pH为6,搅拌速率为200 r/min,沉降时间为5 min,COD去除率达96.7%,出水COD降为276 mg/L,达到国家三级排放标准。Abstract: By orthogonal experiment of L9(34),the optimum conditions of the coagulation experiment were confirmed about concentration of chitosan,pH of wastewater,agitation rate and falling period.The results show that removal rate of COD reached 96.7% when the dosage of chitosan was 100 mg/L,pH was 6,stirring rate was 200 r/min and settling time was 5 min. COD of the effluent was reduced to 276 mg/L,which met the national three-level effluent standard.
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Key words:
- chitosan /
- NBR /
- coagulation /
- orthogonal experiment
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