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采用絮凝沉降-芬顿试剂氧化-中和沉降-生化组合技术对丁苯橡胶废水进行了达标处理研究,重点考察了经过絮凝沉降处理后的丁苯橡胶废水用芬顿试剂处理的反应条件。结果显示,丁苯橡胶废水用150mg/L聚合氯化铝及2mg/L的阳离子聚丙烯酰胺絮凝沉降处理后,废水COD去除率为20.1%;芬顿试剂氧化絮凝沉降后的丁苯橡胶废水的最佳条件为pH 3.5,FeSO4·7H2O 3g/L,H2O2 3g/L,1.5h,30℃,反应后的氧化液用氢氧化钙中和沉降处理,芬顿试剂氧化阶段的COD去除率为74.5%;丁苯橡胶废水经絮凝沉降-芬顿试剂氧化-中和沉降处理后,COD去除率为79.6%,TP去除率在98%以上,该水再经过生化处理后,达到排放要求:COD≤50mg/L,TP≤0.5mg/L,NH4-N≤5mg/L。
The flocculation settling-Fenton reagent oxidation-neutralization-sedimentation-biochemical combination technology was used to treat the styrene-butadiene rubber wastewater. The reaction conditions of the styrene-butadiene rubber wastewater treated by the Fenton reagent were investigated emphatically. The results showed that COD removal rate of SBR was 20.1% after SBR wastewater was treated with 150mg / L polyaluminum chloride and 2mg / L cationic polyacrylamide, and the removal rate of SBR was 20.1% The optimum conditions were as follows: pH 3.5, FeSO4 · 7H2O 3g / L, H2O2 3g / L, 1.5h, 30 ℃. The oxidized solution was neutralized with calcium hydroxide and the COD removal efficiency was 74.5 %; SBR wastewater after flocculation - Fenton reagent oxidation - neutralization and settling treatment, COD removal rate of 79.6%, TP removal efficiency of 98% or more, the water after biochemical treatment to meet the emission requirements: COD ≤ 50mg / L, TP≤0.5mg / L, NH4-N≤5mg / L.