污水快速渗滤处理系统对某些微量有机污染物的净化

The Removal of Some Microorganic Pollutants in Rapid Infiltration Treatment System of Waste Water

利用室内大型土柱对ＲＩ系统中微量有机污染物氯仿、四氯化碳、三氯乙烯、苯及甲苯的净化过程进行了模拟研究．结果表明，系统对三种氯代脂肪烃具有很好的净化效果，其浓度可从进水时２０００～６０００μｇ／Ｌ降至１００μｇ／Ｌ以下．系统对苯和甲苯的净化与淹水时间有关，淹水初期净化效果良好，其浓度可从进水时１０００～１７００μｇ／Ｌ降至１００μｇ／Ｌ以下，但随着淹水时间的延续，净化效果变差，直至出水浓度与进水浓度基本相同．

The removal of some microorganic pollutants such as trichloromethane, tetrachlormethane, trichioroethene, benzene and toluene in rapid infiltration system of waste water have been simulated in large scale soil columns. The three kinds of chlorinated aliphatic hydrocarbons were rapidly removed from influent concentration of 2 000～6 000 μg/L to 100 μg/L. The removal effects of benzene and toluene depended on the flooding time. In the early part of flooding period, benzene and toluene could be removed rapidly from infuent concentration of 1 000～1 700 μg/L to effluent concentration of less than 100 μg/L. With the increase of flooding time, the removal effect became lower and lower until the effluent concentration of benzene and toluene were almost equal to the influent concentration.