摘要
为应对日益严峻的垃圾渗滤液处理挑战,特别是雨季渗滤液激增的问题,保障环境园区的稳定运行和生态环境的安全,在深圳市下坪环境园新建渗滤液扩能改造项目,其渗滤液设计处理规模为1200 m^(3)/d,采用“均化池+两级A/O-MBR+纳滤+反渗透”组合工艺,并采取“减量+浸没燃烧蒸发”技术处理浓缩液,实现全量化处理,有效减轻了园区的环境压力。在项目实施过程中,针对蒸发尾气存在异味、膜设备堵塞影响处理效率等问题,采取了优化设计工艺、改进设备配置等措施,优化后的尾气处理工艺为“蒸发器燃烧+碱洗喷淋塔+升温+布袋除尘+植物液喷淋”,并在纳滤浓缩液进入减量化系统前增加“混凝沉淀+过滤系统”工艺,以有效去除一部分大分子有机物,确保了膜系统的稳定运行,并有效解决了蒸发尾气异味严重的问题。该项目的成功实施,不仅为园区垃圾处理的可持续发展提供了有力支持,也为我国垃圾渗滤液处理技术的发展积累了宝贵的经验。
To address the increasingly severe challenges in landfill leachate treatment,particularly the surge in leachate during the rainy season,and to ensure the stable operation of the environmental park and ecological safety,Shenzhen Xiaping Environmental Park initiated a new leachate treatment capacity expansion and retrofitting project.This project was designed to process 1200 m^(3)/d of leachate,adopting a combined process of equalization tank+two-stage A/O-MBR(membrane bioreactor)+nanofiltration+reverse osmosis.The volume reduction+submerged combustion evaporation technology was utilized for concentrate treatment,achieving full quantitative treatment and significantly alleviating environmental pressure on the park.During implementation,challenges such as odor in evaporation tail gas and membrane equipment clogging(impacting treatment efficiency)were addressed through optimized process design and equipment configuration upgrades.A refined tail gas treatment process was combustion in evaporators+alkali scrubbing spray towers+temperature elevation+bag dust removal+botanical liquid spray,and process of coagulation sedimentation+filtration system was introduced before nanofiltration concentrate enters the volume reduction system to effectively remove macromolecular organics,ensure membrane system stability and mitigate odor issues.The successful execution of this project not only provides robust support for the sustainable development of waste disposal in the park,but also contributes valuable experience to the advancement of landfill leachate treatment technologies in China.
作者
李强
李晓旭
孟了
陈玉婷
刘一夫
陈刚
LI Qiang;LI Xiaoxu;MENG Liao;CHEN Yuting;LIU Yifu;CHEN Gang(CUCDE Environmental Technology Co.Ltd.,Beijing 100120;China Urban Construction Design&Research Institute Co.Ltd.,Beijing 100120;Shenzhen Xiaping Environmental Park,Shenzhen Guangdong 518024)
出处
《环境卫生工程》
2025年第2期77-83,共7页
Environmental Sanitation Engineering
关键词
渗滤液
老龄化
全量处理
膜堵塞
蒸发尾气
leachate
aging
complete quantitative treatment
membrane fouling
evaporation exhaust gases
