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Dosing with pyrite significantly increases anammox performance : its role in the electron transfer enhancement and the functions of the Fe-N-S cycle

Fan Feng, Zhigong Liu, Xi Tang, Xing Wu, Caiyan Qu, Seow Wah How (UGent) , Di Wu (UGent) , Ruiyang Xiao, Chong-Jian Tang, Zhang Lin, et al.
(2023) WATER RESEARCH. 229.
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Abstract
Anaerobic ammonium oxidation (anammox) represents an energy-efficient process for biological nitrogen removal from ammonium-rich wastewater. However, there are mechanistic issues unsolved regarding the low microbial electron transfer and undesired accumulation of nitrate in treated water, limiting its widespread en-gineering applications. We found that the addition of pyrite (1 g L-1 reactor), an earth-abundant iron-bearing sulfide mineral, to the anammox system significantly improved the nitrogen removal rate by 52% in long-term operation at a high substrate shock loading (3.86 kg N m(-3) d(-1)). Two lines of evidence were presented to unravel the underlying mechanisms of the pyrite-induced enhancement. Physiochemical evidence indicated that an in-crease of cytochromes c and Fe-S protein was responsible for the accelerated electron transfer among metabolic enzymes. Multi-omics evidence showed that the depletion of nitrate was attributed to the Fe-N-S cycle driven by nitrate-dependent Fe(II) oxidation and S-based denitrification. This study deepens our understanding of the roles of electron transfer and the Fe-N-S cycle in anammox systems, providing a fundamental basis for the develop-ment of mediators in the anammox process for practical implications.
Keywords
TEMPERATURE, RATIO, UASB, Biological nitrogen removal, Iron mineral, Multi-omics, Autotrophic system, S-based denitrification

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MLA
Feng, Fan, et al. “Dosing with Pyrite Significantly Increases Anammox Performance : Its Role in the Electron Transfer Enhancement and the Functions of the Fe-N-S Cycle.” WATER RESEARCH, vol. 229, 2023, doi:10.1016/j.watres.2022.119393.
APA
Feng, F., Liu, Z., Tang, X., Wu, X., Qu, C., How, S. W., … Chen, G.-H. (2023). Dosing with pyrite significantly increases anammox performance : its role in the electron transfer enhancement and the functions of the Fe-N-S cycle. WATER RESEARCH, 229. https://doi.org/10.1016/j.watres.2022.119393
Chicago author-date
Feng, Fan, Zhigong Liu, Xi Tang, Xing Wu, Caiyan Qu, Seow Wah How, Di Wu, et al. 2023. “Dosing with Pyrite Significantly Increases Anammox Performance : Its Role in the Electron Transfer Enhancement and the Functions of the Fe-N-S Cycle.” WATER RESEARCH 229. https://doi.org/10.1016/j.watres.2022.119393.
Chicago author-date (all authors)
Feng, Fan, Zhigong Liu, Xi Tang, Xing Wu, Caiyan Qu, Seow Wah How, Di Wu, Ruiyang Xiao, Chong-Jian Tang, Zhang Lin, Liyuan Chai, and Guang-Hao Chen. 2023. “Dosing with Pyrite Significantly Increases Anammox Performance : Its Role in the Electron Transfer Enhancement and the Functions of the Fe-N-S Cycle.” WATER RESEARCH 229. doi:10.1016/j.watres.2022.119393.
Vancouver
1.
Feng F, Liu Z, Tang X, Wu X, Qu C, How SW, et al. Dosing with pyrite significantly increases anammox performance : its role in the electron transfer enhancement and the functions of the Fe-N-S cycle. WATER RESEARCH. 2023;229.
IEEE
[1]
F. Feng et al., “Dosing with pyrite significantly increases anammox performance : its role in the electron transfer enhancement and the functions of the Fe-N-S cycle,” WATER RESEARCH, vol. 229, 2023.
@article{01HF19781HQ27PPKMN60XCM4Z0,
  abstract     = {{Anaerobic ammonium oxidation (anammox) represents an energy-efficient process for biological nitrogen removal from ammonium-rich wastewater. However, there are mechanistic issues unsolved regarding the low microbial electron transfer and undesired accumulation of nitrate in treated water, limiting its widespread en-gineering applications. We found that the addition of pyrite (1 g L-1 reactor), an earth-abundant iron-bearing sulfide mineral, to the anammox system significantly improved the nitrogen removal rate by 52% in long-term operation at a high substrate shock loading (3.86 kg N m(-3) d(-1)). Two lines of evidence were presented to unravel the underlying mechanisms of the pyrite-induced enhancement. Physiochemical evidence indicated that an in-crease of cytochromes c and Fe-S protein was responsible for the accelerated electron transfer among metabolic enzymes. Multi-omics evidence showed that the depletion of nitrate was attributed to the Fe-N-S cycle driven by nitrate-dependent Fe(II) oxidation and S-based denitrification. This study deepens our understanding of the roles of electron transfer and the Fe-N-S cycle in anammox systems, providing a fundamental basis for the develop-ment of mediators in the anammox process for practical implications.}},
  articleno    = {{119393}},
  author       = {{Feng, Fan and  Liu, Zhigong and  Tang, Xi and  Wu, Xing and  Qu, Caiyan and How, Seow Wah and Wu, Di and  Xiao, Ruiyang and  Tang, Chong-Jian and  Lin, Zhang and  Chai, Liyuan and  Chen, Guang-Hao}},
  issn         = {{0043-1354}},
  journal      = {{WATER RESEARCH}},
  keywords     = {{TEMPERATURE,RATIO,UASB,Biological nitrogen removal,Iron mineral,Multi-omics,Autotrophic system,S-based denitrification}},
  language     = {{eng}},
  pages        = {{10}},
  title        = {{Dosing with pyrite significantly increases anammox performance : its role in the electron transfer enhancement and the functions of the Fe-N-S cycle}},
  url          = {{http://doi.org/10.1016/j.watres.2022.119393}},
  volume       = {{229}},
  year         = {{2023}},
}
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