垃圾破碎和垃圾压实在厌氧渗滤液循环中的作用

Fragmentation and compaction of rubbish under action of anaerobic leachate recirculation

通过3个对比反应柱研究了厌氧渗滤液循环中垃圾的破碎和压实对垃圾降解的影响。实验结果显示:在填埋垃圾量和渗滤液循环量相同的条件下,经过60 d的厌氧渗滤液循环,对比垃圾柱的出水CODcr浓度为1333.2 mg/L,而破碎垃圾柱和压实垃圾柱出水的CODcr浓度分别为582.4 mg/L和2112.4 mg/L。在厌氧渗滤液循环中,对垃圾进行破碎处理能够加速垃圾的降解,降低垃圾填埋场对地下水的危害;而对垃圾填埋体的压实不利于垃圾的降解,从而增加了垃圾填埋场污染地下水的风险。

Through three columniations of contract reaction, the authors studied the impact of fragmentation and compaction on degradation of rubbish during the recirculation. The experimental results show that, the contract columniation is 1 333.2 mg/L in CODer concentration, and fragmentation and compaction columniations are 582.4 mg/L and 2 112.4 mg/L respectively, under the condition of landfill and leachate recirculation in equivalent volume after 60 day＇s recirculation. During the recirculation of the anaerobic leachate, fragmentation can accelerate the degradation of rubbish, and decrease the hazard of landfill to the groundwater. On the contrary, the compaction goes against the degradation of rubbish, and increases the risk of groundwater pollut,.on.