膜曝气生物膜反应器耦合厌氧氨氧化工艺处理低C/N比生活污水  

Membrane aerated biofilm reactor coupled with anaerobic ammonia oxidation process treating low C/N ratio mainstream sewage

作　　者：宋舒兴 隋倩雯[1,2] 高超龙 狄斐 魏源送[1,2] SONG Shuxing;SUI Qianwen;GAO Chaolong;DI Fei;WEI Yuansong(Laboratory of Water Pollution Control Technology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085;State Key Joint Laboratory of Environment Simulation and Pollution Control,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085;School of Energy and Environmental Engineering,Hebei University of Engineering,Handan 056038)

机构地区：[1]中国科学院生态环境研究中心,水污染控制实验室,北京100085 [2]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 [3]河北工程大学,能源与环境工程学院,邯郸056038

出　　处：《环境科学学报》2023年第4期208-216,共9页Acta Scientiae Circumstantiae

基　　金：国家重点研发计划项目(No.2021YFC3200601);中国科学院青年创新促进会项目(No.2021042);广西重点研发计划项目(No.AB21196036)。

摘　　要：我国生活污水具有低碳氮比的特点,传统硝化-反硝化反应碳源不足,生物脱氮难度大,且常规微孔曝气装置存在过量曝气、亚硝化反应难以控制等问题.因此,本研究构建了膜曝气生物膜反应器(Membrane aerated biofilm reactor,MABR),接种了厌氧氨氧化污泥,采用厌氧-间歇曝气的序批式运行方式处理低碳氮比生活污水.结果表明,在处理模拟废水时(阶段1),进水C/N比为3.02,COD、NH_(4)^(+)-N和TN去除率分别为90.21%、91.74%和79.92%;处理实际生活污水时(阶段2),C/N比为1.81,COD、NH_(4)^(+)-N和TN去除率分别为78.61%、98.40%和80.54%,实现了碳氮污染物的高效去除.两阶段内碳源转化率分别为44.15%和27.02%,其中,阶段一进水采用乙酸钠配制有利于内碳源的转化.反应器出水中有机物主要包含难降解有机物和微生物产物.^(15)N同位素示踪结果表明,两阶段厌氧氨氧化脱氮贡献分别为66%和75%.上述结果表明,采用MABR耦合厌氧氨氧化工艺分别处理模拟废水和实际生活污水,单一与复杂有机物组分条件下,均可实现碳、氮污染物的高效去除,厌氧氨氧化脱氮贡献稳定.Challenges occur in the biological nitrogen removal in conventional nitrification-denitrification process caused by the shortage of carbon sources because of low carbon to nitrogen ratio in domestic wastewater of China.And conventional microporous aeration devices have problems such as over-aeration and difficult control of nitritation.In this study,a membrane aerated biofilm reactor(MABR)was set up to treat low carbon to nitrogen ratio wastewater by inoculating anaerobic ammonia oxidation(anammox)sludge,and operated with a sequencing batch mode comprised of anaerobic and intermittent aeration stages.Results showed that at the influent C/N ratio of 3.02,the removal rates of COD,NH_(4)^(+)-N and TN were 90.21%,91.74%and 79.92%respectively during the synthetic wastewater treatment phase(phase 1).When treating domestic wastewater(phase 2),at the influent C/N ratio of 1.81,the removal rates of COD,NH_(4)^(+)-N and TN were 78.61%,98.40%and 80.54%,respectively,achieving efficient removals of carbon and nitrogen pollutants.The conversion efficiencies of internal carbon sources of the two phases were 44.15%and 27.02%,respectively.The influent of phase 1 was prepared with sodium acetate,which was easily converted into the internal carbon source.The organic matter in effluent of the MABR mainly consisted of non-biodegradable organic and microbial products.The results of isotope ^(15)N tracing tests indicated that the contributions of anammox to TN removal were 66%and 75%of the two phases,respectively.These results of the MABR coupled the anammox process treating synthetic wastewater and domestic wastewater separately showed that it can achieve efficient removals of carbon and nitrogen pollutants under single or complex organic fraction conditions,with stable contributions of anaerobic ammonia oxidation to nitrogen removal.

关 键 词：膜曝气生物膜反应器(MABR) 厌氧氨氧化 低碳氮比生活污水 高效脱氮 

分 类 号：X703[环境科学与工程—环境工程]