Zhao Qing-liang, Liu Xue-yan, Qi Xu-dong, Liu Zhi-gang
School of Municipal and Environment Engineering, Harbin Institute of Technology, China.
J Environ Sci (China). 2006;18(4):625-8.
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 impact of recirculation on leachate production and its quality, two simulated sanitary landfill reactors, one with leachate recirculation and the other without, were placed outdoor in Harbin. The two-year experimental results indicated that leachate production was reduced by 86% with leachate recirculation and less or no facility for leachate treatment required. Recirculation could improve the leachate quality dramatically with lower COD, SS, NH4(+)-N and higher pH level. Recirculation also could enhance waste degradation and stabilization and improve the efficiency of landfill. This study confirmed that leachate recirculation was a very feasible way for on-site landfill leachate treatment in cold areas.
由于季节变化明显，垃圾渗滤液回灌处理工艺在中国东北地区是一种很有前景且经济的方法。为了研究回灌对渗滤液产生量及其水质的影响，在哈尔滨室外放置了两个模拟卫生填埋反应器，一个进行渗滤液回灌，另一个不进行回灌。两年的实验结果表明，通过渗滤液回灌，渗滤液产生量减少了86%，并且所需的渗滤液处理设施更少或无需处理设施。回灌可显著改善渗滤液水质，降低化学需氧量（COD）、悬浮物（SS）、铵态氮（NH4(+)-N），提高pH值。回灌还可增强废物降解和稳定化，提高填埋效率。本研究证实，渗滤液回灌是寒冷地区现场填埋渗滤液处理的一种非常可行的方法。
