生物反应器渗滤液回灌中加入碱度的影响分析

Effect of Alkalinity Variations on Recirculated Anaerobie Bioreactor Landfill

对2个填埋生物反应器在渗滤液回灌中加入碱度,进行对照模拟试验,监测了填埋过程中渗滤液的pH、COD、BOD5、NH4+—N、总氮、VFA、腐殖酸、电导率等指标变化,同时监测了填埋产生的甲烷气体变化。结果表明,通过在填埋生物反应器回灌的渗滤液中添加碱度,可以对pH起到缓冲作用,降低渗滤液COD、BOD5、VFA值;在回灌的渗滤液中添加碱度可以加快填埋系统的甲烷化进程,提高产气量,加速填埋系统的稳定。

Two simulated landfill bioreactors were established,in which column 1 is leachate recirculated only,column 2 is operated by leachate recirculated with alkalinity increase.The changes of pH,COD,BOD_5,NH~＋_4—N,TN,VFA,humic acid,conductivity？of leachate and landfill gas were investigated.The results demonstrate that alkalinity addition has positive effects on removal of COD,BOD_5 and VFA of leachate,the methane production and the stabilization of landfill system.