Integration of MFC reduces CH4, N2O and NH3 emissions in batch-fed wetland systems
Article
Zhu, H., Niu, T., Shutes, B., Wang, X., He, C. and Hou, S. 2022. Integration of MFC reduces CH4, N2O and NH3 emissions in batch-fed wetland systems. Water Research. 226. https://doi.org/10.1016/j.watres.2022.119226
Type | Article |
---|---|
Title | Integration of MFC reduces CH4, N2O and NH3 emissions in batch-fed wetland systems |
Authors | Zhu, H., Niu, T., Shutes, B., Wang, X., He, C. and Hou, S. |
Abstract | The combination of microbial fuel cells (MFCs) with constructed wetlands (CWs) for enhancing water purification efficiency and generating bioelectricity has attracted extensive attention. However, the other benefits of MFC-CWs are seldom reported, especially the potential for controlling gaseous emissions. In this study, we have quantitatively compared the pollutant removal efficiency and the emission of multiple gases between MFC-CWs and batch-fed wetland systems (BF CWs). MFC-CWs exhibited significantly (p < 0.01) higher COD, NH -N, TN, and TP removal efficiencies and significantly (p < 0.01) lower global warming potential (GWP) than BF CWs. The integration of MFC decreased GWP by 23.88% due to the reduction of CH and N O fluxes, whereas the CO fluxes were slightly promoted. The quantitative PCR results indicate that the reduced N O fluxes in MFC-CWs were driven by the reduced transcription of the nosZ gene and enhanced the ratio of nosZ/(nirS + nirK); the reduced CH fluxes were related to pomA and mcrA. Additionally, the NH fluxes were reduced by 52.20% in MFC-CWs compared to BF CWs. The integration of MFC promoted the diversity of microbial community, especially Anaerolineaceae, Saprospiraceae and Clostridiacea. This study highlights a further benefit of MFC-CWs and provides a new strategy for simultaneously removing pollutants and abating multiple gas emissions in BF CWs. [Abstract copyright: Copyright © 2022. Published by Elsevier Ltd.] |
Keywords | Greenhouse gas emission, Constructed wetlands, Ammonia volatilization, Microbial fuel cells |
Publisher | Elsevier |
Journal | Water Research |
ISSN | 0043-1354 |
Electronic | 1879-2448 |
Publication dates | |
Online | 10 Oct 2022 |
01 Nov 2022 | |
Publication process dates | |
Deposited | 01 Nov 2022 |
Submitted | 13 Jun 2022 |
Accepted | 07 Oct 2022 |
Output status | Published |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.watres.2022.119226 |
Language | English |
https://repository.mdx.ac.uk/item/8q211
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