微波无极灯辅助芬顿法深度处理垃圾渗滤液

Removal of Refractory Organics from Biologically Treated Landfill Leachate by Microwave Discharge Electrodeless Lamp Assisted Fenton

采用一种新型的微波无极灯(MDEL)-芬顿法处理垃圾渗滤液生物反应出水中的难降解有机物,并与传统芬顿法和紫外光-芬顿法的处理效果进行对比。MDEL-芬顿工艺对难降解有机物有着更优异的去除效果:COD去除率更高,出水COD质量浓度低于100 mg/L;大多数有机物被转化为分子量小于1 000Da的小分子物质;在渗滤液生化处理出水中检测到的多环芳烃化合物,大部分可以被去除。MDEL-Fenton法可为渗滤液生化处理出水提供便捷的处理方法,使出水中难降解有机物浓度满足严格的排放标准。

The removal of refractory organics from biologically treated landfill leachate by a novel microwave discharge electrodeless lamp（MDEL） assisted Fenton process is investigated in the study and it is also compared to the conventional Fenton and ultra-violet Fenton processes. MDEL assisted Fenton process achieves excellent removal performance of the refractory components and the effluent chemical oxygen demand concentration is lower than 100mg/L. Most organic matters are transformed into smaller compounds with molecular weights less than 1 000 Da. Different polycyclic aromatic hydrocarbons are detected in the biologically treated leachate,most of which can effectively be removed by MDEL-Fenton treatment. MDEL-Fenton process can be adopted as a single-stage polishing process for biologically treated landfill leachate to meet the stringent discharge limit.