垃圾填埋场渗滤液和浓缩液的蒸发特性  

Evaporation characteristics of landfill leachate and its concentrate generated after MBR-NF-RO treatment process

作　　者：潘松青[1] 叶志隆[1] 程蒙召 徐颖[1] 

机构地区：[1]中国科学院城市污染物转化重点实验室,中国科学院城市环境研究所,厦门361021

出　　处：《环境工程学报》2017年第8期4506-4512,共7页Chinese Journal of Environmental Engineering

基　　金：福建省科技计划项目(2014Y0076);广东省中国科学院全面战略合作项目(2012B090400003)

摘　　要：研究了垃圾填埋场渗滤液及其MBR-NF-RO处理过程所产生的膜浓缩过滤液在不同蒸馏阶段的水质情况,对比分析了不同pH下渗滤液蒸发情况,考察了蒸发前后的废水中溶解性有机物(DOM)的变化情况。结果表明,垃圾渗滤液蒸发各阶段水质(COD和NH_4^+-N)情况与膜过滤浓缩液大致相同,都是由高到低再升高的情况;在pH 5~10范围内,随着pH的增高,10%残留率下,NH_4^+-N的蒸发量逐渐增加,而TOC逐渐减少;膜过滤浓缩液和垃圾渗滤液的DOM成分大致相同,都以富里酸和腐殖酸为主,蒸发后蒸发液中DOM以类蛋白和色氨酸为主;通过蒸发法处理垃圾渗滤液膜浓缩液,出水水质可以满足《生活垃圾填埋场污染控制标准》(GB16889-2008);而垃圾渗滤液采用此法处理后仍旧含有较高浓度的NH_4^+-N,需结合其他处理设施才可达标排放。Evaporation treatment was applied to landfill leachate and its concentrate after treatment with MBRNF-RO. The impact of pH and the variation in the components of dissolved organic matter（ DOM） were investigated in lab-scale experiments. The results demonstrated that the variations in concentration of COD and NH4^＋-N showed similar profiles in both leachate and concentrate,with the first increase following decline and final enhancement. When the residual ratio was set at 10%,the evaporation rate of NH4^＋-N increased gradually,coupling with the pH increase,despite TOC reduction. The major components of the landfill leachate and the concentrate were fulvic acid and humic acid; while plastein and tryptophan were the major components in the evaporated liquor. The effluent after concentrate evaporation could meet the requirements of ＂Standard for Pollution Control on the Landfill Site of Municipal Solid Waste＂（ GB16889-2008）. However,the effluent from leachate evaporation exceeded the standard requirement on NH4^＋-N concentration,which meant that the effluent should be treated further,by another process.

关 键 词：蒸发法 垃圾渗滤液 浓缩液 PH DOM 

分 类 号：X703[环境科学与工程—环境工程]