渗滤液性质对含水层中污染物衰减的影响研究

通过土柱模拟实验研究了渗滤液性质对含水层中污染物衰减和微生物活动的影响.结果表明,新垃圾渗滤液、老垃圾渗滤液和雨水通过模拟柱后,其微生物活性分别在第12、17和3d达到最大值0.154、0.121和0.044;BOD5/COD分别在第12、8和6d达到最大值0.683、0.396和0.319;pH的平均升高速度分别为0.074/d、0.15/d和0.055/d;新、老垃圾渗滤液通过模拟柱后COD的平均去除率分别约为50%和10%;含水层介质对NH4+-N的吸附容量约为0.85 g/kg;另外,含水层介质有机质含量与微生物活性之间具有一定的相关性.由此可见,渗滤液的性质对含水层介质中污染物的衰减有重要影响.

Influences of Leachate Property on Pollutants Attenuation in Aquifer

Simulated columns filled with fine sand were conducted to investigate influences of leachate properties on pollutants attenuation and bacterial activity in aquifer.Experimental results indicated that bacterial activity of young landfill leachate,aged landfill leachate and rain water through columns was up to maximum 0.154,0.121 and 0.044 in 12 d,17 d and 3 d,respectively;the maximum BOD_5/COD was up to 0.683,0.396 and 0.319 in 12 d,8 d and 6 d,respectively,and the averaged increasing rate of pH was up to 0....