Effects of plant location on methane emission, bioelectricity generation, pollutant removal and related biological processes in microbial fuel cell constructed wetland

被引：16
作者：
Zhang, Ke [1 ,2 ]
Wu, Xiangling [2 ]
Wang, Wei [1 ]
Luo, Hongbing [2 ]
Chen, Wei [2 ]
Ma, Dandan [2 ]
Mo, You [2 ]
Chen, Jia [2 ]
Li, Lin [2 ]
机构：
[1] Harbin Inst Technol, Sch Environm, Harbin 150090, Heilongjiang, Peoples R China
[2] Sichuan Agr Univ, Coll Civil Engn, Dujiangyan 611830, Peoples R China
来源：
JOURNAL OF WATER PROCESS ENGINEERING | 2021年 / 43卷
基金：
中国国家自然科学基金;
关键词：
Electrochemical methane control; Plant root location; Up-flow constructed wetland; Microbial fuel cell; Microbial community; ELECTRICITY PRODUCTION; WASTE-WATER; COMMUNITY; PERFORMANCE; SYSTEM; DEGRADATION; DYNAMICS; DYE;
D O I：
10.1016/j.jwpe.2021.102283
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Microbial fuel cells (MFC) can effectively control the methane emissions from constructed wetland (CW). In this study, the effect of rhizosphere locations on the reduction of methane emission from CW by operating MFC was further studied. According to results, operating MFC in CW improved the COD removal and inhibited the methane emission from CW by 1/3. Plants (Cyperus alternifolius) roots at anode were more conducive to CW-MFC power generation. The highest power density (47.813 mW/m(3)) was observed in CW-MFC with rhizosphere at anode. The rhizosphere in cathode could improve CW-MFC COD removal. Operating MFC led to the competition between electrogens and methanogens, which changed the microbial community structure and biochemical processes in CW. Proteobacteria, as the main electricigen in CW-MFCs, were specifically enriched in CW-MFC with rhizosphere located in cathode. As the dominant archaea, methanobacteria and methanomicrobia were specifically enriched in CW-MFC with rhizosphere located in anode.
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页数：11
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