废乳化液的电絮凝与化学混凝处理比较

Comparison between treatment methods for waste emulsion

为了降低废乳化液的处理费用和避免二次污染 ,对电絮凝与化学混凝处理废乳化液做了对比试验研究。试验表明电絮凝处理后的出水可用于循环配制乳化液 ,化学混凝的出水则不能。电絮凝处理后的出水pH值 9以上 ,且含有一定量的亚硝酸盐 ,均有利于乳化液配制 ;电絮凝处理设备的一次性投资较多 ,但运行费用低 ,操作简单 ,后处理容易 ,无二次污染 ,比化学混凝处理有优势。由试验得出电絮凝处理最佳条件 :极板间距 1 0mm ,电液密度 5mA/cm2 ,絮凝时间 30min。处理后出水指标 :COD 76 0mg/L ,NO- 2 1 80mg/L ,pH值 9 2。

Electric flocculation method and chemical coagulation for treating the waste emulsion are compared through test. The water from electric flocculation treatment can be used for cyclic preparation of emulsion, while the water from chemical coagulation can not. The optimum conditions for electric flocculation treatment of waste emulsion is : anodes space 10 mm, electrolyte density 5 mA/cm 2, flocculation time 30 min. The index of outlet water: COD 760 mg/L, NO 2 180 mg/L, pH value 9.2.