期刊
BIORESOURCE TECHNOLOGY
卷 245, 期 -, 页码 372-378出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.08.191
关键词
Aquatic macrophyte; Substrate material size; Microbial biodiversity and distribution; Bioelectricity generation; Wastewater treatment
资金
- National Nature Science Foundation of China [51679041, 51309503, 51279207]
- Fundamental Research Funds for the Central Universities [CUSF-DH-D-2017092, CUSF-DH-D-2017101]
Integrating microbial fuel cell with constructed wetland (CW-MFC) is a novel way to harvest bioelectricity during wastewater treatment. In this study, the bioelectricity generation, containment removal and microbial community distribution in CW-MFC as affected by substrate material sizes and aquatic macrophyte were investigated. The planted CW-MFC with larger filler size showed a significant promotion of the relative abundance of electrochemically active bacteria (mbeta-Proteobacteria), which might result in the increase of bioelectricity generation in CW-MFC (8.91 W m(-2)). Additionally, a sharp decrease of voltage was observed in unplanted CW-MFC with smaller filler size in Cycle eight. However, the peak COD (86.7%) and NO3-N (87.1%) removal efficiencies were observed in planted CW-MFC with smaller filler size, which was strongly related to the biodiversity of microorganisms. Generally, the acclimation of exoelectrogens as dominant microbes in the anode chamber of planted CW-MFC with larger filler size could promote the bioelectricity generation during wastewater treatment.
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