垃圾填埋场渗滤水回灌技术的研究 Ⅱ.填埋场对渗滤水净化能力的研究

在文献1]回灌技术影响因素的基础上进一步以土灌注、垃圾柱、土壤一垃圾混合柱模拟了填埋场土壤覆盖层、垃圾填埋层、填埋场混合填埋层的情况，探求出工程设计所需的垃圾填埋场沙滩水回灌净化能力的有关参数．

Study on the Back Irrigation of Leachate from Garbage Landfill

In the present paper, various factors influcing the effectiveness of backirrigation technique on the treatment of leachate were investigated, usinglaboratory lysimeters of soil columns, garbage columns and soil-garbagecombined columns to simulate the behavior of the soil layers, garbage layers andsoil-garbage mixture layers of practical landfill. The parameters applicable forthe design of back irrigation technique on the treatment of leachate weredetermined. It was found that over 98% COD of the leachate could be removed bythe soil columns when the weight ratio of soil and sand was kept at 7: 1 and theinitial COD values were ranged 1 800~30 000mg.L-1. When the simulating garbagecolumns were used and the COD and BOD of the leachate were in the range of7 000~30 000 and 5 000~20 000mg.L-1, over 95% COD and 96% BOD could beremoved, respectively. The removal efficiencies of COD and BOD in soil- garbagecolumns were found to be higher than 98 % and 99%, respectively, with the similarinitial COD and BOD of the leachate showed above.