间歇曝气矿化垃圾反应器处理中晚期渗滤液

Treatment of mature landfill leachate by using intermittent aeration of aged refuse reactor

针对中晩期渗滤液可生化性差、难以处理等特点采用驯化后的矿化垃圾作为渗滤液处理介质。在用实验室矿化垃圾填充的生物反应器上采用在底部间歇曝气的方式,考察其对中晚期渗滤液的处理效果。结果表明,在进水负荷为25.O L·(m^3·d)^(-1),曝气2 h,停歇4 h,总曝气量为0.596 m^3·(m^3·d)的条件下,COD平均去除率为80.0%氯氮平均去除率为98.1%总氮平均去除率为25.7%总磷平均去除率为93.0%。该矿化垃圾反应器处理中晚期渗滤液能达到良好较稳定的污染物去除效果并对渗滤液中污染物浓度的变化具有较好的适应能力。

Mature landfill leachate was formed by the extension of landfill time,and it is difficult to treat.Aged refuse is a good leachate treatment medium after domestication.The treatment effect on the landfill leachate was investigated by using a reactor with intermittent bottom aeration.With a hydraulic load of 25.0 L·（m^3·d）^-1,aeration for two hours,and rest for four hours,the results were an aeration quantity of 0.596 m·（m^3·d）^-1,average COD removal rate of 80%,average NH4^＋-N removal rate of 98.1%,average TN removal rate of 25.7%,and average TP removal rate of 93.0%.The reactor removed pollutants well and had good adaptability to changes in concentration of pollutants in the leachate.