Integration of MFC reduces CH4, N2O and NH3 emissions in batch-fed wetland systems

Zhu, Hui, Niu, Tingting, Shutes, R. Brian E., Wang, Xinyi, He, Chunguang and Hou, Shengnan (2022) Integration of MFC reduces CH4, N2O and NH3 emissions in batch-fed wetland systems. Water Research, 226 , 119226. ISSN 0043-1354 [Article] (doi:10.1016/j.watres.2022.119226)


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.]

Item Type: Article
Keywords (uncontrolled): Greenhouse gas emission, Constructed wetlands, Ammonia volatilization, Microbial fuel cells
Research Areas: A. > School of Science and Technology > Natural Sciences
Item ID: 36686
Depositing User: Jisc Publications Router
Date Deposited: 01 Nov 2022 10:50
Last Modified: 01 Nov 2022 10:50

Actions (login required)

View Item View Item


Activity Overview
6 month trend
6 month trend

Additional statistics are available via IRStats2.