污泥热水解厌氧消化滤液处理工程溶解性有机物  

Characteristics of dissolved organic matters in the treatment of the dewatering liquor of anaerobic digestion pretreated by thermal hydrolysis

作　　者：岳文慧 刘吉宝[1,2] 郭建宁 魏源送[1,2,3] 隋倩雯 YUE Wen-hui;LIU Ji-bao;GUO Jian-ning;WEI Yuan-song;SUI Qian-wen(State Key Joint Laboratory of Environment Simulation and Pollution Control,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;Department of Water Pollution Control,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;University of Chinese Academy of Sciences,Beijing 100049,China;Shenzhen Institute of Information Technology,Shenzhen 518172,China)

机构地区：[1]中国科学院生态环境研究中心,环境模拟与污染控制国家重点联合实验室,北京100085 [2]中国科学院生态环境研究中心水污染控制实验室,北京100085 [3]中国科学院大学,北京100049 [4]深圳信息职业技术学院,广东深圳518172

出　　处：《中国环境科学》2024年第2期699-707,共9页China Environmental Science

基　　金：国家重点研发计划项目(2021YFC3200601);中国科学院青年创新促进会项目(2021042)。

摘　　要：以典型的污泥热水解厌氧消化滤液处理工程为对象进行现场调查.结果表明,滤液中氨氮和COD的浓度分别高达(2034±465),(4128±276) mg/L,滤液中溶解性有机物(DOM)主要是大分子难降解有机物,大于1000Da的DOM占80.6%.现有“生物预处理+两级AO-MBR”滤液处理工艺总体上可实现高效脱氮(TN去除率94.9%)和部分COD去除(69.9%).脱氮主要依赖生物预处理单元(去除贡献率为79.9%),而DOM去除主要依赖MBR工艺的膜过滤(去除贡献率为184.7%).膜过滤截留的DOM依次为高分子聚合物>腐植酸类物质>低分子有机酸和中性物质,出水DOM主要以腐植酸和富里酸类物质为主,且腐殖化程度增高.现有的水洗、酸洗和碱洗对膜的有机污染均有一定的清洗效果,但清洗液中DOM类型差异明显.An on-site investigation was conducted to characterize dissolved organic matter(DOM)in the anaerobic digestion(AD)filtrate that was generated from a typical sludge thermal hydrolysis process(THP).The results show that the concentrations of ammonia nitrogen and COD in the filtrate were as high as 2034(±465)and 4128(±276)mg/L,respectively,and the DOM concentration in the filtrate was mainly macromolecular refractory organic matter,and DOM>1000Da accounted for 80.6%.The existing"biological pretreatment+two-stage AO-MBR"filtrate treatment process could generally achieve a high-efficiency denitrification(TN removal rate of 94.9%and partial COD removal of 69.9%).Nitrogen removal relied mainly on biological pretreatment units(removal by 79.9%),while DOM removal on membrane filtration of the MBR process(removal by 184.7%).The membrane filtration intercepted DOM was in the order of high molecular polymer>humic acid substances>low molecular organic acids and neutral substances.The effluent DOM was mainly composed of humic acid and fulvic acid substances with a high degree of humification.Existing water washing,acid-and alkali washing had certain cleaning effects on organic pollution of membranes,but the types of DOM in the cleaning solution were significantly different.

关 键 词：污泥厌氧消化 溶解性有机物(DOM) 腐殖质 有机组分 三维荧光光谱 

分 类 号：X703[环境科学与工程—环境工程]