PFS预处理垃圾渗滤液回灌出水的混凝条件研究

Study on the coagulation conditions for the pretreatment of recirculated leachate with PFS

研究了聚合硫酸铁(PFS)混凝预处理垃圾渗滤液回灌出水的混凝条件。通过正交实验确定的最佳混凝条件为:原水pH=5,投加PFS 180 mg/L,200 r/min搅拌2 min后投加助凝剂PAM 5 mg/L,100 r/min搅拌15 min,20r/min搅拌10 min后沉淀20 min。在此条件下,其对垃圾渗滤液中COD、TOC、BOD、色度、浊度的去除率分别达69.25%、62.44%、73.5%、71.82%和58.33%。PFS混凝预处理可有效减轻后续处理工艺的运行负荷,为垃圾渗滤液回灌出水的处理提供了参考。

The coagulation condition s for the pretreatment of recirculated leachate with poly ferric sulfate （PFS） have been studied. PFS is used for pretreating the reclrculated [eachate. The factors which have influences on coagu- tions, the removing rates of COD, TOC, BOD, chroma and turbidity in landfill leachate are 69.25%, 62.44%, 73.5%, 71.82% and 58.33% ,respectively. The organic loading of subsequent treatment steps is effectively reduced through PFS coagulation. The research results can provide a reference for the pretreatment of recirculated leachate