Integration of MFC reduces CH4, N2O and NH3 emissions in batch-fed wetland systems
| 第一作者： |
Zhu, Hui |
| 英文第一作者： |
Zhu, Hui |
| 联系作者： |
Zhu, Hui |
| 英文联系作者： |
Zhu, Hui |
| 发表年度： |
2022 |
| 卷： |
226 |
| 摘要： |
The combination of microbial fuel cells (MFCs) with constructed wetlands (CWs) for enhancing water purifi-cation 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, NH4+-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 CH4 and N2O fluxes, whereas the CO2 fluxes were slightly promoted. The quantitative PCR results indicate that the reduced N2O fluxes in MFC-CWs were driven by the reduced transcription of the nosZ gene and enhanced the ratio of nosZ/(nirS + nirK); the reduced CH4 fluxes were related to pomA and mcrA. Additionally, the NH3 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. |
| 刊物名称： |
Water Research |
| 参与作者： |
Zhu, H., et al. |
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