Methanation and chemolitrophic nitrogen removal by an anaerobic membrane bioreactor coupled partial nitrification and Anammox  

作　　者：Qian Li Zhaoyang Hou Xingyuan Huang Shuming Yang Jinfan Zhang Jingwei Fu Yu-You Li Rong Chen 

机构地区：[1]Key Laboratory of Environmental Engineering of Shaanxi Province,Xi'an University of Architecture and Technology,Xi'an 710055,China [2]Department of Civil and Environmental Engineering,Graduate School of Engineering,Tohoku University,Sendai Miyagi 980-8579,Japan [3]International S&T Cooperation Center for Urban Alternative Water Resources Development,Key Laboratory of Northwest Water Resource,Environment and Ecology(Ministry of Education),Xi'an University of Architecture and Technology,Xi'an 710055,China

出　　处：《Frontiers of Environmental Science & Engineering》2023年第6期37-47,共11页环境科学与工程前沿（英文）

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.52070148 and 52270049);the Shaanxi Provincial Key Program for Science and Technology Development(China)(No.2022KWZ-25);the Japan Society for the Promotion of Science(No.P20794).

摘　　要：An AnMBR-PN/A system was developed for mainstream sewage treatment.To verify the efficient methanation and subsequent chemolitrophic nitrogen removal,a long-term experiment and analysis of microbial activity were carried out.AnMBR performance was less affected by the change of hydraulic retention time(HRT),which could provide a stable influent for subsequent PN/A units.The COD removal efficiency of AnMBR was>93%during the experiment,85.5%of COD could be recovered in form of CH4.With the HRT of PN/A being shortened from 10 to 6 h,nitrogen removal efficiency(NRE)of PN/A increased from 60.5%to 80.4%,but decreased to 68.8%when the HRTPN/A further decreased to 4 h.Microbial analysis revealed that the highest specific ammonia oxidation activity(SAOA)and the ratio of SAOA to specific nitrate oxidation activity(SNOA)provide stable NO_(2)^(−)-N/NH_(4)^(+)-N for anammox,and anammox bacteria(mainly identified as Candidatus Brocadia)enriched at the bottom of Anammox-UASB might play an important role in nitrogen removal.In addition,the decrease of COD in Anammox-UASB indicated partial denitrification occurred,which jointly promoted nitrogen removal with anammox.

关 键 词：Anaerobic membrane bioreactor Partial nitrification/Anammox Carbon separation Chemolitrophic nitrogen removal 

分 类 号：X701[环境科学与工程—环境工程] TQ424[化学工程]