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

第一作者： Pang, Si

作者： Pang, Si;Pang, Si;Cai, Xiang;Yang, Lin;Zhou, Jingzhou;Li, Xiaodi;Xia, Siqing;Pang, Si;Yang, Lin;Zhou, Jingzhou;Li, Xiaodi;Xia, Siqing;Cai, Xiang

作者机构：

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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