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污染控制技术及原理

Study on the removal of organic pollutants from water of Sanjiadian reservoir by sand infiltration system

摘要：采用COD_Mn和BOD作为指标对沙渗滤系统去除三家店水库水中有机污染物的效果进行了评价.试验构建一个长约10m、宽2m、高2m的砖混结构渗滤池,渗滤池分隔为8个小渗滤池,选择3种不同的沙分别构建1m³见方的渗滤床.渗滤系统持续运行125d,经历高温的夏季和低温的冬季.试验结果表明,渗滤系统对三家店水库水中有机污染物能有效去除,COD_Mn去除率一般在20%～40%,BOD的去除率一般在20%～80%,COD_Mn、BOD的出水值分别小于4mg·L^-1、3mg·L^-1;渗滤层厚度的增加不能显著增加有机污染物的去除率;温度对COD_Mn和BOD的去除有明显的影响;3种渗滤介质对COD_Mn和BOD均能有效去除,建筑沙对去除有机质的效果相对好一点.

Abstract：A sand infiltration system is one of the processes used for removing contaminants from surface waters and improving the water quality. This experiment took COD_Mn and BOD as factors to evaluate the effect of organic mater removal of slightly-polluted water in Sanjiadian Reservoir. The sand filtration system was built by a 10m length, 2m width, 2m depth flume with construction of brick and cement. The building was divided into eight sand filter beds, which were packed with three kinds of sands in a cube 1m long. Two replicates were performed for each treatment. The system had been operated for 125 days from the summer with high temperature to the winter with low temperature. The results of experiment showed: (Ⅰ)the system can remove effectively the organic matters in Sanjiadian reservoir, with COD_Mn and BOD removed by about 20%～40% and 20%～80% And COD_Mn and BOD in effluent were lower than 4mg·L^-1 and 3mg·L^-1, that (Ⅱ)the increase of sand filter bed thickness couldn't increase the removal rate of organic matters; that (Ⅲ)the temperature could affected on the removal of COD_Mn and BOD obviously; that (Ⅳ)the three kinds of sands were effective for the removal of COD_Mn and BOD, relatively, the sand used in construction was more effective.