洗涤废水的处理技术研究

目的]拓展超声辐射在废水处理方面的应用,探索降解洗涤废水的新途径。方法]采用对比试验研究超声辐射、Fenton试剂氧化及超声-Fenton试剂耦合法对洗涤废水的降解效果;采用正交试验研究超声时间、pH值、FeSO4投加量、H2O2投加量对超声-Fenton试剂耦合法降解洗涤废水的影响。结果]超声辐射和Fenton试剂氧化对洗涤废水的降解率都不高,超声-Fenton试剂耦合对洗涤废水的降解率在反应的前10 min随着时间的增加而急剧增加,10 min后趋于稳定,降解完全;各因素对超声-Fenton试剂耦合法降解洗涤废水的影响次序为:反应时间>H2O2投加量>FeSO4投加量>pH值。结论]在超声-Fenton试剂耦合法降解洗涤废水过程中,当反应时间为10 min,pH值为4,FeSO4投加量为1.0 g/L、H2O2投加量为2 ml/L时,对废水的降解率最高,可达91.2%。

Study on The Treatment Technology for Washing Wastewater

Objective] The study was to expand the application of ultrasonic radiation in treatment of wastewater and explore the new way of degrading washing wastewater.Method] The degradation effects of ultrasonic radiation,Fenton reagent oxidation and Fenton reagent oxidation and ultrasonic coupling on washing wastewater were studied through the contrast tests.The effects of ultrasonic time,pH value,dosing quantity of FeSO4 and H2O2 on ultrasonic-Fenton reagent coupling in degrading washing wastewater were studied by orthogonal test.Result] The degradation rate of ultrasonic radiation and Fenton reagent oxidation for washing wastewater were all not high,the degradation rate of ultrasonic-Fenton reagent coupling for washing wastewater increased rapidly along with the time prolonging in the first 10 min of the reaction,and it tended to be stable and completely degrade after 10 min.The affect of all the factors on the ultrasonic-Fenton reagent coupling in degrading washing wastewater in order was reaction time>dosing quantity of H2O2 >dosing quantity of FeSO4>pH value.Conclusion] The degradation rate for wastewater was the highest,being 91.2%,when the reaction time was 10 min,the pH value was 4,the dosing quantity of FeSO4 was 1.0 g/L,the dosing quantity of H2O2 was 2 ml/L in the process of ultrasonic-Fenton reagent coupling in degrading washing wastewater.