生活垃圾焚烧厂渗滤液全量化处理技术研究  

Study on Full Quantification Treatment Technology of Leachate in Municipal Solid Waste Incineration Plant

作　　者：黄华 黄正鹏 沈元鹏 李浓 HUANG Hua;HUANG Zhengpeng;SHEN Yuanpeng;LI Nong(Nanning Environmental Sanitation Management Office,Nanning Guangxi 530002;Nanning Sanfeng Energy Co.Ltd.,Nanning Guangxi 530012)

机构地区：[1]南宁市环境卫生管理处,广西南宁530002 [2]南宁市三峰能源有限公司,广西南宁530012

出　　处：《环境卫生工程》2024年第4期78-82,共5页Environmental Sanitation Engineering

摘　　要：根据南方城市某生活垃圾焚烧厂2019-2023年渗滤液水质指标、渗滤液处理及其衍生物深度处理系统实际运行情况,对渗滤液和浓缩液处理系统稳定运行的关键参数和控制要求进行分析总结。渗滤液处理采用“厌氧(UASB)+反硝化+硝化+超滤(UF)+一级管网式反渗透(STRO)+二级卷式反渗透(RO)”工艺,浓缩液处理采用“两级氧化+两级絮凝沉淀+三级蒸发+母液回喷”工艺。实践表明:UASB工艺容积负荷(以COD计)为5~10 kg/(m^(3)·d),污泥浓度约为8 000 mg/L,COD∶N∶P=(350~500)∶5∶1,水力停留时间为7~15 d;一级A/O的硝化与反硝化的水力停留时间比控制在3∶2,硝化液回流比约为300%~1 000%,污泥浓度为20 g/L,污泥龄约为30 d;再经UF、STRO、RO进一步深度处理,出水达标后可回收利用。Based on the leachate quality index,leachate treatment and derivative depth treatment system operation practice of a municipal solid waste incineration plant in the southern city from 2019 to 2023,the key parameters and control requirements for the stable operation of leachate and concentrate treatment system were analyzed and summarized.The leachate treatment adopted the process of“anaerobic(UASB)+denitrification+nitrification+ultrafiltration(UF)+first-stage pipe network reverse osmosis(STRO)+second-stage reverse osmosis(RO)”,the concentrate treatment process was“two-stage oxidation+two-stage flocculation and sedimentation+three-stage evaporation+mother liquid reinjection”.The practice indicated that the volumetric load(calculated by COD)of UASB process was 5-10 kg/(m^(3)·d),the sludge concentration was about 8000 mg/L,COD∶N∶P was(350-500)∶5∶1,and the hydraulic retention time was 7-15 d.The hydraulic retention time ratio of nitrification and denitrification in primary A/O was controlled at 3∶2,the reflux ratio of nitrification solution was about 300%-1000%,the sludge concentration was 20 g/L,and the sludge age was about 30 d.After further advanced treatment by UF,STRO and RO,the effluent could be recycled after reaching the standard.

关 键 词：生活垃圾焚烧厂 渗滤液 全量化处理 浓缩液蒸发 

分 类 号：X703[环境科学与工程—环境工程] X799.3