哈尔滨垃圾填埋场渗滤液的特性及回灌处理(英文)

Landfill leachate characteristics and treatment in Harbin

由于东北地区四季变化明显,冰冻期较长,渗滤液的产生具有明显的不连续性,回灌技术在该地区具有广阔的应用前景.为研究渗滤液回灌对渗滤液水质、水量和固体废物稳定化的影响,选择典型生活垃圾,并在室外建立两个模拟垃圾填埋场,一个采用渗滤液回灌技术,另一个没有渗滤液回灌做为对比参考,进行三年连续的监测研究.实验结果表明回灌能减少87.6%的渗滤液,节省处理设施;回灌能明显改善渗滤液水质,显著降低总有机碳(TOC)、化学需氧量(COD)、生化需氧量(BOD)、挥发性脂肪酸(VFA)、氨氮(NH4+-N)和悬浮固体(SS)浓度,并提高pH值,降低渗滤液处理难度.同时渗滤液回灌技术能强化固体废物的降解和稳定化过程,提高填埋场的使用效率.此成果对垃圾渗滤液回灌处理技术在东北寒冷地区的应用具有一定的实践指导意义.

Landfill leachate recirculation treatment process is a promising and economic way in northeast China due to the distinct season variation. In order to study the effects of leachate recycle on leachate production, leachate quality and waste stabilization, two simulated sanitary landfill reactors, one with leachate recirculation and the other without, were placed outdoor in Harbin. The three - year experimental results indicated that leachate production was reduced by 87. 6% with leachate recirculation which meant less or no facility for leachate treatment was required. Recirculation could improve leachate quality dramatically with lower TOC, COD, BOD, VFA, NH4^＋ - N, SS and higher pH level which made leachate treatment easy. Recirculation also could enhance waste degradation and stabilization and improve the efficiency of landfill. This study confirmed that leachate recirculation was a feasible way for on - site landfill leachate treatment and waste stabilization in cold area like northeast China.