准好氧矿化垃圾去除渗滤液中有机物的试验研究  

Experimental Investigation on Removal of Organics in Leachate Using Semi-aerobic Aged Refuse

作　　者：张爱平[1] 刘丹[1] 苏艳萍[1] 刘咏[2] 

机构地区：[1]西南交通大学环境科学与工程学院,四川成都610031 [2]四川师范大学化学与材料科学学院,四川成都610068

出　　处：《西南交通大学学报》2008年第1期142-146,共5页Journal of Southwest Jiaotong University

基　　金：铁道部“十一五”重点课题(2005Z007);西南交通大学博士生创新基金资助项目

摘　　要：用室内埋龄为3 a的准好氧矿化垃圾填充生物反应床,分别在自然通风和封闭填埋条件下对渗滤液进行灌注处理,以探讨准好氧矿化垃圾对渗滤液中有机物的去除特性和效果.结果表明：准好氧矿化垃圾去除最多的是渗滤液中含量最多的分子量小于2×10^3的有机物.当水力负荷为40 L/（m^3.d）时,在自然通风和封闭填埋条件下总溶解性有机物的去除率分别为92%和87%;当水力负荷为50 L/（m^3.d）时,总溶解性难降解有机物的去除率分别为34%和21%.在自然通风条件下,当水力负荷从50 L/（m^3.d）减小到25 L/（m^3.d）时,相应的容积负荷从600 g/（m^3.d）减小到300 g/（m^3.d）,化学需氧量（COD）去除率从85%提高到93%以上.经过40 d连续运行,生物反应床出水中的COD质量浓度稳定在400-900 mg/L之间.In order to investigate the removal characteristics and efficiency, an age of 3 a in the laboratory was used to remove organics in leaehate by semi-aerobic refuse with filling in bioreactors by perfusion under the conditions of natural ventilation and closed landfilling. The experimental investigation shows that the most of organics with a molecular weight of less than 2 × 10^3 are removed by the aged refuse. Under natural ventilation and closed landfilling conditions, the removal efficiency of total dissolved organics is respectively 92% and 87% when hydraulic load is 40 L/（ m^3 · d）, and that of total dissolved refractory organics is respectively 34% and 21% when the hydraulic load is 50 L/（ m^3 · d）. Under a natural ventilation condition, the removal efficiency of chemical oxygen demand （COD） increases from 85% up to 93% as the hydraulic load decreases from 50 to 25 L/（ m^3 · d）,and the relative volume load decreases from 600 to 300 g/（ m^3 · d）. After continuous operation of 40 d, the mass concentration of COD in effluent ranges from 400 to 900 mg/L.

关 键 词：准好氧 矿化垃圾 渗滤液 有机物 分子量分布 

分 类 号：X705[环境科学与工程—环境工程]