回灌参数对渗滤液浓缩液盐分截留的影响

Effect of Salinity Removal from Different Recirculation Parameters in the Leachate Concentrate Recirculation Process

回灌参数对渗滤液浓缩液回灌中盐分的截留有一定的影响,为更科学合理地选择回灌参数,该文采用成都某垃圾填埋场的渗滤液浓缩液,对装填了填埋龄为15 a垃圾的9个垃圾柱开展了不同回灌参数对渗滤液浓缩液回灌中盐分截留的影响研究,将一种新型的绝对接近关联度的建模方法用于对回灌参数影响的定量分析。结果表明,回灌负荷对盐分截留的影响最大,4.5、6 L/d回灌负荷的敏感因子分别为2.785 5和2.779 3,其次为24 L/h的回灌速度、中央布水的回灌方式、6 L/h的回灌速度,影响最小的分别为3、6次/d回灌频次和分散布水的回灌方式,因此在实际回灌工程中,回灌负荷需优先控制,其次应控制回灌速度。

Recirculation parameters have some effect on salinity removal in the leachate concentrate recirculation process. Research on sensitivity of effluent salinity from the leachate concentrate recirculation process to recirculation parameters can provide certain theoretical basis. By using leachate concentrate from a refuse landfill in Chengdu, the experiments of salinity removal from different recirculation parameters were carried out in nine landfill columns filled with garbage in 15 landfill ages for selecting recirculation project parameters. The Influences on recirculation effluent salinity of the different recirculation parameters were researched. Based on the experimental results, modeling with a novel grey absolutely correlation degree analysis method, the recircutation parameters on salinity were researched quantitatively. It is showed that the greatest effect on salinity is recirculation load, and the sensitivity are 2.785 5,2.779 3 respectively, the velocity of 24 L/h, the central water distribution mode and the velocity of 6 L/h followed. The effects of the frequency of three, six times per day and the dispersion of water mode are the least. So the recirculation load and are priority control factors for reducing the salinity of recirculation effluent.