摘要
反渗透浓缩液作为膜达标产水后富集物,其溶解性总固体和总氮含量高,基本不具备生物处理条件,一直是渗滤液处理的难点,目前国内的处理方式主要为回喷/回灌和蒸发。成都某填埋场浓缩液处理系统采用浸没燃烧蒸发工艺全量处理反渗透浓缩液,利用高温烟气与反渗透浓缩液直接换热缓解系统结垢,通过控制pH和温度等反应条件,解决盐分在渗滤液系统内积累的问题,促进系统的稳定良性运转,蒸发产生的蒸汽冷凝后产水水质达标,另设置反渗透系统作进一步保障。该项目出水水质满足《生活垃圾填埋场污染控制标准》(GB16889-2008)的表2标准。采用厌氧沼气和天然气作为能源,整体自动化程度高,运行稳定,出水水质达标。以产水量计,电耗<45 kW·h/m^(3)、天然气消耗量约82m^(3)/m^(3).
The concentrated leachate with high total dissolved solids(TDS)and total nitrogen content,as the concentrate after reverse osmosis(RO)membrane treatment to meet the effluent discharge standard,lack of conditions for biological treatment and has been an industry-wide challenge.The present techniques employed domestically are chiefly recirculation and evaporation.A landfill site in Chengdu utilizes submerged combustion evaporation for full treatment of the RO concentrated leachate,and uses direct heat exchange between the high-temperature flue gas and RO leachate to alleviate system scaling.Through the control of reaction conditions such as pH and temperature,the problem of salt accumulation in the leachate system is solved,and the virtuous circle of steady operation of the system is promoted.The steam condenses to effluent water after evaporation is up to the discharge standard.A RO system is also set up for further protection.The effluent quality meets criteria in the table 2 of the Standard for Pollution Control on the Landfill Site of Municipal Solid Waste(GB 16889-2008).Anaerobic biogas and natural gas have been used as energy sources,which ensures overall high automation,stable operation and up-tostandard effluent quality.According to water production,the power consumption is less than 45 kW·h/m^(3)and natural gas consumption is about 82m^(3)/m^(3).
作者
张聪慧
王凯
刘一夫
姚远
王候兵
石欢
吉龙标
李强
陈玉婷
李晓旭
ZHANG Cong-hui;WANG Kai;LIU Yi-fu;YAO Yuan;WANG Hou-bing;SHI Huan;JI Long-biao;LI Qiang;CHEN Yu-ting;LI Xiao-xu(Beijing Symgreen Environmental Technology Group Co.Ltd.,Beijing 100041,China;China Urban Construction Research Institute<Beijing>Environmental Technology Co.Ltd.,Beijing 100120,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2024年第14期119-125,共7页
China Water & Wastewater
关键词
垃圾填埋场
垃圾焚烧厂
反渗透浓缩液
溶解性总固体
总氮
浸没燃烧蒸发
盐分积累
全量处理
landill sites
waste incineration plant
reverse osmosis concentrated leachate
total dissolved solids(TDS)
total nitrogen
submerged combustion evaporation
salt accumulation
full-scale treatment
