渗滤液回灌频率对生物反应器填埋场的影响研究  

Effect of leachate recirculation frequency on the stabilization of anaerobic bioreactor landfill

作　　者：李启彬[1] 刘丹[1] 

机构地区：[1]西南交通大学环境科学与工程学院,成都610031

出　　处：《环境工程学报》2007年第10期32-36,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(40302033)

摘　　要：通过模拟实验研究了渗滤液回灌周期为1、2、3和5 d的4个模拟垃圾柱的产甲烷过程和渗滤液水质的变化情况。在用NaOH调节回灌渗滤液pH值的前提下,回灌频率越高,模拟厌氧型生物反应器填埋垃圾柱先开始产甲烷,但当回灌周期低于3 d时,开始产甲烷的时间相差不多。从渗滤液水质看,回灌周期为3 d的垃圾柱渗滤液COD、VFA等有机污染物浓度下降最快。综合考虑启动时间、运行费用和填埋场的稳定进程,在厌氧型生物反应器填埋场中,实施3 d/次的渗滤液回灌频率最为合适。The methanogenesis process and the changes of leachate of 4 simulated landfill columns with a leachate recirculation period of 1 , 2, 3 and 5 days respectively have been studied through simulated experiment. Under the condition of adjusting the pH value of recirculated leachate with NaOH, the simulated anaerobic biore- actor landfill with higher leachate recirculation frequency began to produce methane earlier. But the difference between the time to produce methane was smaller while the recirculation period was under 3 days. It was shown that decline rate of COD, VFA concentration of leachate was fastest when the recirculation period is 3 days. Considering the time to begin to produce methane, the running cost in the start - up period and the stabilization rate in the methanogensis phase, the best period to recirculate leachate is 3 days in an anaerobic bioreactor landfill.

关 键 词：生物反应器填埋场 渗滤液回灌频率 产甲烷 稳定 

分 类 号：X705[环境科学与工程—环境工程]