老龄化垃圾渗滤液处理技术研究进展

Research Progress of Mature Landfill Leachate Treatment Technology

垃圾渗滤液的浸出,对地表水和地下水的水质具有潜在威胁。渗滤液经过5年的填埋期后会逐渐发生老化,老龄化垃圾渗滤液中含有高浓度的难降解有机物、氨氮、重金属和无机盐,常规污水处理方法难以对其进行有效处理。目前针对老龄化垃圾渗滤液水质的特殊性,衍生出了一系列处理工艺:膜分离工艺、高级氧化工艺以及以厌氧氨氧化作为核心工艺的生物处理技术等。本文系统研究了老龄化垃圾渗滤液处理技术的国内外研究进展,探讨了不同技术工艺的优缺点,并指出改进的建议和发展方向。

The leaching of landfill leachate is a potential threat to the quality of surface water and groundwater.The leachate will gradually age after 5 years of landfill.The mature landfill leachate contains high concentrations of refractory organic matter,ammonia nitrogen,heavy metals and inorganic salts,which is difficult to be effectively treated by conventional sewage treatment methods.At present,according to the particularity of the quality of mature landfill leachate,a series of treatment processes have been derived:membrane separation technology,advanced oxidation process and biological treatment technology with anaerobic ammonia oxidation as the core process.This paper systematically studies the research progress of mature landfill leachate treatment technology at home and abroad,discusses the advantages and disadvantages of different technologies,and points out the improvement suggestions and development direction.