絮凝沉淀—Fenton试剂氧化法处理含高浓度硫酸盐的洗涤剂生产废水

Treatment of High Concentration Sulfate Wastewater in Detergent Production by Flocculation-Fenton Reagent Oxidation Process

采用絮凝沉淀—Fenton试剂氧化法处理含高浓度硫酸盐的洗涤剂生产废水(简称废水),考察了各种因素对COD去除率的影响。实验结果表明:根据实际废水的水质情况,选用聚合氯化铝(PAC)为絮凝剂,PAC最佳加入量为0.3g/L,经絮凝处理后COD去除率为42.3%;Fenton试剂氧化的最佳操作条件为:n(H_2O_2):n(Fe^(2+))= 0.5、H_2O_2加入量为7 mmol/L、反应时间为2 h,不调节废水初始pH,经Fenton试剂氧化处理后COD去除率为70%以上。经絮凝沉淀—Fenton试剂氧化法处理后,废水COD由1950 mg/L降至240 mg/L,总的COD去除率为87.7%,废水处理效果良好。

High concentration sulfate wastewater in detergent production was treated by flocculation - Fenton reagent oxidation process and the factors affecting the removal rate of COD were studied. According to the wastewater quality, PAC was used as flocculant with the optimum dosage of 0.3 g/L, the COD removal rate is 42.3% after flocculation. Under the optimum conditions of n（ H2O2）/ n（Fe^2＋ ） 0.5, H2O2 dosage 7 mmol/L, reaction time 2 h and without pH adjustment, the COD removal rate is above 70% after Fenton reagent oxidation. After treated by flocculation -Fenton reagent oxidation process, the wastewater COD is decreased from 1 950 mg/L to 240 mg/L, and the total COD removal rate is 87.7%.