Microbial synergy mechanism of hydrogen flux influence on hydrogen-based partial denitrification coupled with anammox in a membrane biofilm reactor
文献类型： 外文期刊
作者： Pang, Si 1 ; Cai, Xiang 2 ; Yang, Lin 2 ; Zhou, Jingzhou 2 ; Li, Xiaodi 2 ; Xia, Siqing 2 ;
作者机构： 1.Shanghai Acad Agr Sci, Ecoenvironm Protect Res Inst, Shanghai 201403, Peoples R China
2.Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R China
3.Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China
4.Zhejiang Normal Univ, Coll Geog & Environm Sci, Jinhua 321004, Peoples R China
关键词： Partial denitrification; Hydrogen oxidation; Membrane biofilm reactor; Nitrate and ammonium removal; Metagenomics
期刊名称：ENVIRONMENTAL RESEARCH （ 影响因子：7.7； 五年影响因子：7.7 ）
ISSN： 0013-9351
年卷期： 2025 年 268 卷
页码：
收录情况： SCI
摘要： The hydrogen-based partial denitrification coupled with anammox (H2-PDA) biofilm system effectively achieves low-carbon and high-efficiency biological nitrogen removal. However, the effects and biological interaction mechanism of H2 flux with the H2-PDA system have not yet been understood. This study assessed the effects of H2 flux on interactions among anammox bacteria (AnAOB), denitrifying bacteria (DB), and sulfate-reducing bacteria (SRB) coexisting in a H2-PDA system. Results showed the simultaneous removal of 40 mg/L ammonium nitrogen (NH4+-N) and 50 mg/L nitrate nitrogen (NO3--N) in the H2-PDA system at a flux of 0.13-0.14 e- eq/(m2 center dot d) without additional organic carbon. Candidatus _Brocadia was involved in H2 oxidation and was negatively associated with the heterotrophic Thauera genus (DB). The expression of nirS and dsrA was increased to 5.6 x 105 copies/gSS and 2.1 x 105 copies/gSS, respectively, with excessive H2 flux (0.17 e- eq/(m2 center dot d). This study provides technical guidance for understanding and applying the H2-PDA technology for low-carbon wastewater treatment.
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