Seo D C, Lee H J, Hwang H N, Park M R, Kwak N W, Cho I J, Cho J S, Seo J Y, Joo W H, Park K H, Heo J S
Division of Applied Life Science, Gyeongsang National University, Jinju, 660-701, Korea.
Water Sci Technol. 2007;55(1-2):251-9. doi: 10.2166/wst.2007.009.
To treat cutting oil wastewater produced in metal surface treatment industry, Ultrasonication (US)-Fenton process, which is one of the advanced oxidation processes, was used. The optimum conditions to treat non-biodegradable pollutants using the US-Fenton process were that the application rates of H2O2 and FeSO4 were 10% and 3 g/L, respectively, the value of pH was 3, and the ultrasonication time was 30 min. It identified non-degradable pollutants such as ethylene diamine tetraacetic acid (EDTA) and Triethanolamine (TEA) in the cutting oil wastewater. TLC analysis of two compounds of treated water by the coagulation process was similar to that of raw water. However, TLC analysis of two compounds of US-Fenton process was different from that of raw water, meaning that US-Fenton process decomposed the EDTA and TEA. To study the possibility of application with the US-Fenton process to pilot plant, the pollutants treatment efficiency of three different methods, such as US-Fenton process, activated sludge process and coagulation process, in continuous experiments were compared. The removal rate of pollutants by the US-Fenton process according to the effluent time was higher than any other processes. The removal rates of COD, SS, T-N and T-P by US-Fenton process were 98, 93, 75 and 95%, respectively.
为处理金属表面处理行业产生的切削油废水，采用了高级氧化工艺之一的超声（US）-芬顿工艺。使用US-芬顿工艺处理难生物降解污染物的最佳条件为：H2O2和FeSO4的投加量分别为10%和3 g/L，pH值为3，超声时间为30分钟。研究确定了切削油废水中存在乙二胺四乙酸（EDTA）和三乙醇胺（TEA）等难降解污染物。混凝工艺处理后水中这两种化合物的薄层层析（TLC）分析结果与原水相似。然而，US-芬顿工艺处理后水中这两种化合物的TLC分析结果与原水不同，这意味着US-芬顿工艺分解了EDTA和TEA。为研究US-芬顿工艺应用于中试装置的可能性，比较了连续实验中US-芬顿工艺、活性污泥工艺和混凝工艺这三种不同方法对污染物的处理效率。US-芬顿工艺随出水时间的污染物去除率高于其他任何工艺。US-芬顿工艺对化学需氧量（COD）、悬浮物（SS）、总氮（T-N）和总磷（T-P）的去除率分别为98%、93%、75%和95%。
