紫外光芬顿+EM菌高效脱氮组合工艺在垃圾渗滤液膜浓缩液处理的中试应用  

Pilot-scale application of the combined process of UV-Fenton with EM microflora based biochemical denitrification in the treatment of landfill leachate membrane concentrate

作　　者：李华英 肖雄 赵建树 任兆勇 孟了 黄俊标 钟锋 金青海 屈浩 欧阳峰 LI Huaying;XIAO Xiong;ZHAO Jianshu;REN Zhaoyong;MENG Liao;HUANG Junbiao;ZHONG Feng;JIN Qinghai;QU Hao;OUYANG Feng(Shenzhen Xiaping Environmental Park,Shenzhen 518024,China;Shenzhen Pangu Environmental Technology Co.Ltd,Shenzhen 518055,China;College of Science,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China)

机构地区：[1]深圳市下坪环境园,深圳518024 [2]深圳市盘古环保科技有限公司,深圳518055 [3]哈尔滨工业大学(深圳),深圳518055

出　　处：《环境工程学报》2023年第4期1377-1386,共10页Chinese Journal of Environmental Engineering

摘　　要：针对垃圾渗滤液膜浓缩液中有机物成分复杂、难以降解的特点,采用UV-Fenton催化氧化+EM菌(有效微生物菌群)高效生物脱氮组合工艺开展连续120 d的中试实验,考察了组合工艺中各处理单元对浓缩液中COD、TN和NH_(3)-N的去除效果。结果表明,组合工艺运行稳定,对COD、TN和NH_(3)-N的去除率分别达到95.2%、90%和95%,出水各项指标均能满足《生活垃圾填埋场污染控制标准》(GB 16 889-2008)排放要求。结合紫外可见光谱、三维激发-发射光谱和气相色谱-质谱实验结果,UV-Fenton催化氧化可使浓缩液中含有共轭键有机物的芳香结构在较大程度上被破坏,分子质量聚合度大幅降低,从而将腐殖质以及可见光区富里酸等难降解的大分子有机物降解为小分子,从而提高可生化性。后续的EM菌高效生物脱氮单元基于硝化反硝化,可以进一步高效去除NH_(3)-N和TN。With regards to the complex composition and difficult degradation of organic compounds in landfill leachate membrane concentrate,a pilot-scale test was carried out continuously in 120 days by using the combined process of UV-Fenton catalytic oxidation with highly efficient microorganism(EM)based biological denitrification.The removal efficiency of COD,TN and NH3-N of leachate membrane concentrate by each treatment unit of the combined process were investigated.The results illustrated that the combined process performed stably,and the corresponding removal rate of COD,TN and NH3-N reached 95.2%,90% and 95%,respectively.Meanwhile,each effluent indicator could meet the discharge requirements in Domestic Waste Pollution Control Standard(GB 16889-2008).On the basis of UV-vis spectra,three-dimensional fluorescence spectra and GC-MS analysis,the UV-Fenton unit could greatly damage the aromatic structure of the conjugated organic compounds in the leachate concentrate,and significantly reduced polymerization degree of the molecular weight,thus degraded the refractory macromolecules such as humus-like substance or fulvic acids in visible light region into small molecules and improved the biodegradability of leachate concentrate.The subsequent EM based biological denitrification unit could further and efficiently remove NH3-N and TN.

关 键 词：垃圾渗滤液 膜浓缩液 紫外光芬顿氧化 EM高效生物脱氮 中试应用 

分 类 号：X703[环境科学与工程—环境工程]