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Enhanced nitrogen removal of the anaerobic ammonia oxidation process by coupling with an efficient nitrate reducing bacterium(Bacillus velezensis M3-1)

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Journal of Environmental Sciences 2024年第12期146卷 3-14页

作者： Wanlian Yuan Dongmin Yang Xupo Zhang Cancan Jiang Danhua Wang Jialiang Zuo Shengjun Xu Xuliang Zhuang School of Life Sciences Division of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230027China Key Laboratory of Environmental Biotechnology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Tibetan Plateau Earth System Environment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China

Bacillus velezensis M3-1 strain isolated from the sediment of Myriophyllum aquatium con-structedwetlandswas found to efficiently convert NO_(3)^(-)-N to NO_(2)^(−)-N,and the requirements for carbon source additionwere not very *** demonstrates,for the first time,the feasibility of using the synergy of anammox and Bacillus velezensis M3-1 microorganisms for nitrogen *** this study,the possibility of M3-1 that converted NO_(3)^(−)-N produced by anammox to NO_(2)^(−)-N was verified in an anaerobic *** NO_(3)^(−)-N reduction ability of M3-1 and denitrifying bacteria in coupling system was investigated under different C/N conditions,and it was found that M3-1 used carbon sources preferentially over denitrifying *** adjusting the ratio of NH4+-N to NO_(2)^(−)-N,it was found that the NO_(2)^(−)-N con-verted from NO_(3)^(−)-N by M3-1 participated in the original *** nitrogen removal efficacy(NRE)of the coupled system was increased by 12.1%,compared to the control group anammox system at C/N=2:*** gene indicated that itmight be a nitrate reducing *** study shows that the nitrate reduction rate achieved by the Bacillus velezensis M3-1 can be high enough for removing nitrate produced by anammox process,which would enable improve nitrogen removal from wastewater.

关键词： Bacillus velezensis M3-1 Anammox Denitrifying bacteria C/N nitrogen removal efficacy Functional gene abundance

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