MABR-AO耦合工艺处理乡镇低C/N比生活污水效果研究  

Study on the Effect of MABR-AO Coupling Process on the Treatment of Low C∕N Township Domestic Sewage

作　　者：胡艺维 何勇 宋南川 牛佳伟 杨程 邱丽娜 HU Yiwei;HE Yong;SONG Nanchuan;NIU Jiawei;YANG Cheng;QIU Lina(College of River and Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074;Chongqing Hechuan Ecological Environment Monitoring Station,Chongqing 401520;Chongqing Haoyang Water Service and Construction Management Co.,Ltd.,Chongqing 400020;Low Carbon and Eco-Environment Protection Research Center,Chongqing Academy of Science and Technology,Chongqing 401121)

机构地区：[1]重庆交通大学河海学院,重庆400074 [2]重庆市合川区生态环境监测站,重庆401520 [3]重庆市豪洋水务建设管理有限公司,重庆400020 [4]重庆市科学技术研究院低碳与生态环保研究中心,重庆401121

出　　处：《环境影响评价》2024年第3期69-73,77,共6页Environmental Impact Assessment

基　　金：重庆市技术创新与应用发展专项重点项目(CSTB2022TIAD-KPX0128);重庆市基本科研业务费项目(cast2022jbky40018)。

摘　　要：本研究针对村镇生活污水低碳氮比导致碳源不足、硝化-反硝化工艺动能不足、脱氮难度高导致脱氮效果不理想的问题,通过设计搭建膜曝气生物反应器(MABR)与传统AO工艺的耦合工艺系统,对村镇进水条件下的挂膜启动,处理低碳氮比(COD/TN为4、3、2、1、0.5)污水,并对两种活性污泥的生物多样性检测分析。结果表明,MABR挂膜周期约30天,系统达到较为稳定的污染物去除效果;在低碳氮比进水条件下,MABR-AO耦合工艺比AO工艺有更好的脱氮能力,总氮(TN)平均去除率相比AO工艺提高17.9%;MABR生物膜中OUTs更高,且脱氮类微生物占比高于AO工艺活性污泥,是脱氮能力更强的主要原因。该工艺运维简单,低碳氮比条件下总氮去除能力较强。In order to solve the problems of insufficient carbon source,limited kinetic energy of nitrification-denitrification process and high difficulty of denitrification from low carbon-to-nitrogen(C∕N)ratios in domestic sewage from villages and towns,the coupling process system of membrane aeration bioreactor(MABR)and traditional AO process was designed and established in this study.This system was utilized to initiate biofilm formation under the inlet conditions typical of villages and towns,treat sewage with low C∕N ratios(COD∕TN ratios of 4,3,2,1 and 0.5),and analyze the biodiversity of the activated sludge from both processes.The results indicate that the MABR biofilm formation cycle lasts approximately 30 days,during which the system achieves a relatively stable pollutant removal efficiency.Compared to the AO process,the MABR-AO coupled process exhibits superior nitrogen removal capacity under low C∕N ratio conditions,with an average total nitrogen(TN)removal rate improved by 17.9%.Furthermore,the MABR biofilm demonstrates a higher abundance of operational taxonomic units(OUTs)and a greater proportion of denitrifying microorganisms compared to the AO process activated sludge,accounting for its stronger denitrification capacity.This process is straightforward to operate and maintain,and demonstrates robust total nitrogen removal capacity under low C∕N ratio conditions.

关 键 词：MABR-AO耦合工艺 乡镇污水 低碳氮比 

分 类 号：X703[环境科学与工程—环境工程]