Effects of plant location on methane emission, bioelectricity generation, pollutant removal and related biological processes in microbial fuel cell constructed wetland
Effects of plant location on methane emission, bioelectricity generation, pollutant removal and related biological processes in microbial fuel cell constructed wetland
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DOI：
10.1016/j.jwpe.2021.102283
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发表时间：
2021-10
影响因子：
7
通讯作者：
Ke Zhang-;Xiangling Wu;Wen Wang;Hongbing Luo;Wei Chen;Dandan Ma;You Mo;Jia Chen;Lin Li
中科院分区：
文献类型：
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作者：
Ke Zhang-;Xiangling Wu;Wen Wang;Hongbing Luo;Wei Chen;Dandan Ma;You Mo;Jia Chen;Lin Li
微生物燃料电池（MFC）可以有效控制人工湿地（CW）的甲烷排放。在这项研究中，根际位置的影响，减少甲烷排放量从CW运行MFC进行了进一步的研究。结果表明，在CW中运行MFC可以提高COD的去除率，并将CW中甲烷的排放量抑制了1/3。位于阳极的风车草根系更有利于CW-MFC发电。以根际为阳极的CW-MFC的功率密度最高（47.813 mW/m3）。阴极的根际环境能促进CW-MFC对COD的去除。运行MFC导致产电菌和产甲烷菌之间的竞争，改变了CW中的微生物群落结构和生化过程。变形菌作为CW-MFC中的主要产电菌，在CW-MFC中得到了特异性富集，根际位于阴极。CW-MFC中甲烷菌和甲烷微菌是优势古菌，根际位于阳极。
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/m3) 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.