用聚硅酸铁铝对垃圾渗沥液进行预处理的研究

采用一种新型高效的无机高分子混凝剂——聚硅酸铁铝(PSAF)用于垃圾渗沥液亚滤装置的预处理。结果表明，在PSAF的投加量为150mg/L，pH为5．0和沉降时间为60min的条件下，混凝效果最佳，浊度去除率可达92％左右，色废去除率可达91％左右，CODcr去除率可达70％左右。同时探讨了该混凝剂处理垃圾渗沥液的反应机理。

Study on pretreatment of landfill leachates using polysilicate aluminum ferrite

A new highly efficient coagulant (PSAF) with high molecular weight was applied to as pretreatment of SF(Sub\|Filter). Compared to PFS, it was found that PSAF has a better turbidity reducing, decolor and COD\-\{Cr\} removing ability for landfill leachates. The result shows that, under the condition of the addition of PSAF \{150 mg/L,\} pH 5.0 and setting time 60 min, the best outcome was achieved: the removal rate of turbidity is about 92%, the removal rate of color is about 91% and the removal rate of COD\-\{Cr\} is about 70%. The reaction mechanism of treating landfill leachates on the coagulant has been discussed at the same time.