生活垃圾填埋场反渗透膜浓缩液回灌垃圾堆体对渗沥液水质影响  

Effect of RO Concentrates for Recharging Landfill Pile on Leachate Water Quality in Domestic Wastes Landfill

作　　者：齐海浪 原效凯[1] 李璐菡 徐永彬 QI Hailang;YUAN Xiaokai;LI Luhan;XU Yongbin(Guangdong Architectural Design and Research Institute Group Co.,Ltd.,Guangzhou 510010,China;Dongguan City Management and Comprehensive Law Enforcement Bureau,Dongguan 523527,China)

机构地区：[1]广东省建筑设计研究院集团股份有限公司,广东广州510010 [2]东莞市城市管理和综合执法局,广东东莞523527

出　　处：《净水技术》2024年第10期144-153,195,共11页Water Purification Technology

摘　　要：文章以东莞市3座已临时封场的生活垃圾填埋场为研究对象,跟踪、收集和分析了时间跨度为1年的渗沥液原水水质中COD_(Cr)、BOD_(5)、氨氮、TN、TP、电导率、SS主要污染物浓度随反渗透膜浓缩液回灌垃圾堆体的浓缩液量变化的数据。研究发现,当浓缩液回灌量大于临界量后,渗沥液污染物中的SS、BOD5、电导率浓度与浓缩液回灌量的平方均呈现较为明显正相关性,而浓缩液回灌临界量与填埋场存量垃圾量和渗沥液产生量也呈正相关。浓缩液回灌会造成垃圾堆体渗沥液的各污染物浓度的升高,其中对电导率影响最大,其次是有机污染物,然后是TN、氨氮,最后是SS和TP,其中对TP影响最小。浓缩液回灌会导致渗沥液水质中电导率和总溶解性固体急剧增加并超过处理设施的进水水质浓度限制,将严重影响采用以蝶管式反渗透(DTRO)为主体的渗沥液处理设备的正常运行。因此,文章建议不应采用浓缩液回灌垃圾堆体的方式对浓缩液实施处理。This paper took three domestic waste landfill sites which had been temporarily closed in Dongguan City,Guangdong Province as the research object.The concentrations of major pollutants such as COD_(Cr)、BOD_(5),ammonia nitrogen,TN,TP,electrical conductivity and SS in the raw leachate water with a time span of 1 year were tracked,collected and analyzed.In this paper,it was found that when the concentration of concentrated liquid recharge was greater than the critical amount,the concentration of SS,BOD5 and electrical conductivity in leachate pollutants were significantly positively correlated with the square of the concentration of concentrated liquid recharge,and the critical amount of concentrated liquid recharge was also positively correlated with the amount of waste stored in landfill and the amount of leachate produced.Recharging of concentrated liquid could increase the concentration of various pollutants in landfill leachate,which had the greatest effect on electrical conductivity,followed by organic pollutants,TN,ammonia nitrogen,and finally SS and TP,among which the influence on TP is the least.Due to the recharging of landfill can cause the electrical conductivity and total dissolved solids in the leachate water quality to increase sharply and exceed the concentration limit of the influent water quality of the equipment,which can seriously affect the normal operation of the leachate treatment equipment using disc tube reverse osmosis(DTRO)as the treatment method.This paper suggests that recharge of reverse osmosis membrane concentrate into the landfill should not be the treatment method of reverse osmosis membrane concentrate.

关 键 词：生活垃圾填埋场 反渗透膜浓缩液 回灌垃圾堆体 垃圾渗沥液水质 电导率 渗沥液处理 

分 类 号：X703[环境科学与工程—环境工程]