垃圾渗滤液MBR出水的单独过硫酸盐体系深度处理技术  

Advanced treatment of MBR effluent from lanfill leachate with peroxymonosulfate system

作　　者：陈凯阳 盛天予 苏良湖 谈超群 Chen Kaiyang;Sheng Tianyu;Su Lianghu;Tan Chaoqun(School of Civil Engineering,Southeast University,Nanjing 211189,China;Nanjing Institute of Environmental Sciences,Ministry of Ecology and Environment,Nanjing 210042,China)

机构地区：[1]东南大学土木工程学院,南京211189 [2]生态环境部南京环境科学研究所,南京210042

出　　处：《东南大学学报（自然科学版）》2023年第6期1091-1099,共9页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金面上资助项目(52070041);江苏省自然科学基金面上资助项目(BK20211175)。

摘　　要：研究了过硫酸盐(PMS)体系对垃圾渗滤液MBR出水中污染物(COD、NH^(+)_(4)-N等)的处理效能及机理,同时对该处理体系的生物毒性变化和经济性进行了分析.结果表明,单独PMS能够有效氧化垃圾渗滤液MBR出水中的主要污染物,其中COD的去除效能随PMS投量的增加而提高,并在PMS投量为20.36 g/L时达到最高78.3%的去除率;在氧化剂投量为5.09 g/L条件下,降解了97.2%的NH+4-N,同时脱除了97.6%的色度.PMS体系会优先去除MBR出水中的小分子有机物,腐殖酸和富里酸也几乎被完全去除(>99%).该体系中,对NH^(+)_(4)-N和色度降解起主要贡献的是HClO和ClO-,对有机物去除起主要贡献的组分则是未活化的PMS.若以去除90%的COD为目标,则PMS最佳投量为1.018 g/L,对应的最小成本为3835元/t.经PMS体系处理后的MBR出水生物毒性大幅增加,应着重考虑如何降低出水的环境影响.The efficacy and mechanism of the peroxymonosulfate(PMS)system for the treatment of pollutants(chemical oxygen demand(COD),NH^(+)_(4)-N,etc.)in the membrane bioreactor(MBR)effluent from the leachate were investigated,and the biotoxicity and economics of the system were analyzed.The results show that the PMS system can oxidize the main pollutants in the MBR effluent from the leachate.The removal efficiencies of COD increase with the increase of PMS dosage and reach a maximum of 78.3%at a dosage of 20.36 g/L;97.2%of NH^(+)_(4)-N was degraded and 97.6%of the color was removed at an oxidant dosage of 5.09 g/L.The PMS system preferentially removed the small molecules in the MBR effluent,and the humic and fulvic acids were also almost completely removed(>99%).In this system,the main contributors to the degradation of NH^(+)_(4)-N and color are HClO and ClO-,while the main contributor to the removal of organic matter is the unactivated PMS.If the goal is to remove 90%of COD,the optimal dosage of PMS is 1.018 g/L,and the corresponding minimum cost is 3835 yuan/t.The biological toxicity of the MBR effluent after treatment with the PMS system is greatly increased,and the environmental impact of the effluent should be minimized.

关 键 词：过硫酸盐(PMS) 垃圾渗滤液 效能 机理 最小成本 生物毒性 

分 类 号：X703[环境科学与工程—环境工程]