微电解处理合成橡胶废水工艺的混凝效果研究

Coagulation research of rubber compounding wastewater treatment process by microelectrolysis

在混凝沉淀-铁炭微电解-中和沉淀法预处理合成橡胶冲洗废水工艺过程中,混凝沉淀和中和沉淀部分以及反应器中铁炭比、pH、气水比、停留时间对拉开粉去除效率产生了影响,对此进行了试验研究及分析.结果表明,微电解参数范围为Fe∶C=1∶1,2∶1,4∶1;pH=3,4,5;气水比为11,19,24;停留时间为30,40,60min.混凝沉淀、微电解、中和沉淀三个单元各去除拉开粉5%～10%,60%～70%,10%～20%;去除CODCr30%～40%,10%～20%,10%～20%.

A experimental study is made to analyse the effect of coagulating sedimentaion and neutralized sedimentation to the removal rate of nekal BX,and that of ironcarbon ratio,PH,gaswater ratio and retention period in the reactor during the rubber compounding wastewater pretreatment process of coagulating sedimentation-ironcarbon microelectrolysisneutralized sedimentation method.The results show that when the microelectrolysis parameter scope is Fe∶C=1∶1,2∶1,4∶1,PH=3,4,5,gaswater ratio=11,19,24,reaction time 30,40,60 min,the removal rate of nekal BX in three parts (coagulating sedimentation,microelectrolysis and neutralized sedimentation) is separately 5%～10%,60%～70%,10%～20%,and that of COD_(Cr) is 30%～40%,10%～20%,10%～20%.