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Unraveling the role of formate in improving nitrogen removal via coupled partial denitrification-anammox

Frontiers of Environmental Science & Engineering 2024年第9期18卷 79-90页

作者： Wanlu Zhu Rui Xiao Min Xu Wenbo Chai Wenlong Liu Zhengyu Jin david ikumi Huijie Lu Key Laboratory of Environmental Remediation and Ecological Health(Ministry of Education) College of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058China China National Nuclear Corporation Beijing Research Institute of Chemical Engineering and MetallurgyBeijing 100029China College of Environment Zhejiang University of TechnologyHangzhou 310014China Key Laboratory of Ecology and Environment in Minority Areas National Ethnic Affairs CommissionCollege of Life&Environmental SciencesMinzu University of ChinaBeijing 100081China Water Research Group Department of Civil EngineeringUniversity of Cape TownRondebosch 7700South Africa Key Laboratory of Water Pollution Control and Environmental Safety Hangzhou 310058China

The addition of traditional carbon sources(e.g.,acetate)could favor heterotrophic overgrowth in partial denitrification coupled with anammox(PD–A)systems,thus hindering the performance and stability of this novel wastewater nitrogen removal ***,it is necessary to develop an effective,environmentally friendly,and inexpensive *** study demonstrated the potential of formate to enhance the performance and community stability of PD–A under mainstream *** a laboratory-scale biofilm reactor,formate addition(COD/NO_(3)^(–)–N=1.75)improved nitrogen removal efficiency(from 72.1±3.5%to 81.7±2.7%),EPS content(from 106.3±8.1 to 163.0±15.5 mg/gVSS)and increased anammox bacteria growth(predominantly Candidatus Brocadia,from 29.5±0.7%to 34.5±5.4%)while maintaining stable heterotrophs dominated by methylotrophic ***–NanoSIMS revealed a formate uptake using *** and Desulfobacillus,with *** being the major contributor to partial nitrate reduction to *** can synthesize diverse hydrophobic amino acids and provide key nutrients for *** achieve comparable nitrogen removal,the cost of the formate-driven PD–A process should be 11.2%lower than that of *** results greatly enrich our understanding of C1 metabolism represented by formate in anammox communities and its application in the context of coupling partial denitrification–anammox toward enhanced nitrogen removal in global wastewater treatment systems.

关键词： Formate Mixotrophic growth Partial denitrification-anammox Metabolic interaction FISH-NanoSIMS

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