采用外加过氧化氢(H₂O₂)的电芬顿-铁氧化体系(EF-FeO_x体系)处理餐厨垃圾发酵液MBR出水。探究了H₂O₂投加量、电流密度、反应时间对餐厨垃圾发酵液污染物去除率的影响,并用响应曲面法对以上3个因素进行优化,预测的最佳条件为:H₂O₂投加量为1.94 mmol、电流密度为0.016 5 A/cm²、反应时间为45 min;预测的餐厨垃圾发酵液的COD去除率为64.77%,验证实验的平均去除率为64.32%,相对偏差为2.8%。对比进出水三维荧光光谱(3D-EEM)可知,餐厨垃圾发酵液MBR出水的污染物在反应过程中被部分降解,自由基识别(EPR)结果显示·OH起主要氧化作用。

The electro-Fenton-FeO_x system with externally added hydrogen peroxide is applied to treat with MBR effluent from kitchen wastes fermentation liquid.The effects of H₂O₂ concentration,current density and reaction time on COD removal efficiency are investigated,and these three factors are optimized by using response surface methodology.The predicted optimal conditions are as follows:H₂O₂ concentration is 1.94 mmol·L^-1,current density is 0.016 5 A·cm^-2 and reaction time is 45 min.It is predicted that the removal efficiency of COD is 64.77% under the optimal conditions.It is verified via experiments that the average removal efficiency of COD reaches 64.32%,showing a deviation of 2.8%.The pollutants in MBR effluent from kitchen wastes fermentation liquid are partly degraded during the reaction according to 3D-EEM and EPR results.It is indicated by free radical recognition results that ·OH plays a major role in oxidation.

王诗雯(1997-),女,硕士生,研究方向为污水处理,1685472352@qq.com。