非正规垃圾填埋场地下水污染控制技术比较

Comparison of different techniques for control of groundwater pollution in an informal landfill

以我国北方某非正规垃圾填埋场为例,应用数值模拟方法,分别对不同的地下水污染控制技术效果进行了模拟预测。结果显示:针对研究区的水文地质结构特征及场区内垃圾特性,抽水为短期内最优控制技术;源项去除控制技术则为长期的最优选择;帷幕灌浆、河流防渗以及顶部覆盖不透水层的控制技术,只能阻滞场区内潜水中污染物向外迁移,无法阻止污染物对微承压水的入渗。

Using an informal landfill in north China as an example, different techniques for control of groundwater pollution were simulated and their effectiveness was predicted with numerical modeling. The results showed that, based on the hydrogeological structural properties and solid waste dumping characteristics in the study area, pumping groundwater was the best technique for a short period, and the technique of removing the pollution sources was the optimal choice for a long period. Pollution control technology such as curtain grouting, anti-seepage walls between the river and the dumping site, and an upper impermeable layer cover can only be used to block migration of groundwater pollutants out of the landfill, but cannot prevent migration of pollutants in feeble confined water.