絮凝预处理对垃圾浓缩液有机物去除影响研究

Study on the Effect of Flocculant Pretreatment on the Removal of Organic Matter from Waste Concentrates

垃圾填埋场渗滤液浓缩液的处置是填埋场运行管理的难题,其富含的高浓度有机物会导致MVR蒸发设备结垢和起泡。为解决这一问题,研究了多种絮凝剂对浓缩液有机物絮凝效果,明确了最佳的絮凝剂及絮凝条件。研究结果表明:絮凝剂PFS絮凝效果最好,PAFC絮凝效果最差,PAC、SC-101L和PSAF的最适pH值分别为3,5和3,TOC去除率分别为75%,83%,60%。絮凝效果与絮凝剂投加量成正相关关系,絮凝剂PAC、PSAF、PFS、SC-101L、PAFC在最适投加量下TOC的去除率分别为57%,46%,98%,64%,48%。

Disposal of landfill leachate concentrate is a challenge for landfill operation and management,and its high concentration of organic matter can lead to fouling and blistering of MVR evaporation equipment.In order to solve this problem,the flocculation effect of various flocculants on organic matter in the concentrate was studied,and the best flocculant and flocculation conditions were clarified.The results showed that the flocculant PFS had the best flocculation effect,PAFC had the worst flocculation effect,and the optimum pH value of PAC,SC-101L and PSAF were 3,5 and 3,respectively,and the TOC removal rate was 75%,83%and 60%,respectively.The flocculation effect was positively correlated with the flocculant dosage,and the TOC removal rates of flocculants PAC,PSAF,PFS,SC-101L,and PAFC were 57%,46%,98%,64%,and 48%,respectively,at the optimum dosage.