中文摘要：

为处理高浓度生物难降解兰炭废水，考查了利用不锈钢作阳极和石墨气体扩散电极作阴极构成的电芬顿体系对兰炭废水COD的去除效果。系统地考察了空气流速、电流密度、溶液pH值及极板间距等因素对废水COD去除率的影响。电解过程的较佳条件：空气流速为2．5L／min；电流密度为5．2mA／cm^2；溶液pH值为3；极板间距为2cm。电芬顿法处理兰炭废水240min之后，COD最高去除率可达78．62％，实现了对兰炭废水的预处理，为兰炭废水的处理提供了新的途径。

英文摘要：

An improved electro-Fenton technology with stainless steel anode and cathode of graphite-based gas diffusion electrode is introuced in this work to enhance removal rate of COD in semi-coke wastewater which is famous for high treatment cost as its biodegradation is hard. By several exhaustive experiments, the optimum re- moval rate of COD is up to 78.62% at the optimized conditions in the laboratory of the oxygen sparging rates of 2.5 L/min, the optimal electrode plates distance of 2 cm, current density of 5.2 mA/cm2 , solution pH of 3, and duration of 240 min, which provides a high efficiency pretreatment for semi-coke wastewater, and an promis- ing new method for the treatment of non-biodegradable high concetration wastewater in the future.