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Abstract：
This work studied bacterial community structure and gene function prediction in long-term running of dual graphene modified bioelectrode bioelectrochemical systems (LT D-GM-BE BES, 2 year). The maximum power density of LT D-GM-BE BES was 99.03 ± 3.64 mW/m2, which was 3.66 times of dual control BES (D-C-BE BES), and the transfer resistance of LT GM-BE was just approximately 1/4 of control bioelectrode (C-BE). Proteobacteria and Firmicutes were dominant bacteria in long-term modified bioanode (LT GM-BA, 30.03% and 45.64%), and in long-term modified biocathode (LT GM-BC) was Armatimonadetes (47.14%) in phylum level. The dominant bacteria in LT GM-BA was Clostridium (30.56%), in GM-BC was Chthonomonas (47.14%) in genus level. Gene function related with substrate, energy metabolism and environmental adaptation were enriched. LT GM-BE was tended to enrich dominant bacteria and enrich gene to adapt to micro-environmental changes. This study would provide metagenomics information for long-term running of BES in future.
摘要：
这项工作研究了双石墨烯修饰的生物电极生物电化学系统（LTD-GM-BEBES，2年）。LTD-GM-BEBES的最大功率密度为99.03±3.64mW/m2，是双控BES（D-C-BEBES）的3.66倍，LTGM-BE的转移电阻约为对照生物电极（C-BE）的1/4。在长期修饰的生物阳极中，变形菌和厚壁菌是优势菌(LTGM-BA，30.03％和45.64％），在长期改良的生物阴极（LTGM-BC）中，门水平的Aramatimonadetes（47.14％）。LTGM-BA中的优势菌为梭菌(30.56%),在GM-BC属水平上是衣藻(47.14%)。与底物相关的基因功能，丰富了能量代谢和环境适应。LTGM-BE倾向于富集优势菌并富集基因以适应微环境变化。这项研究将为将来BES的长期运行提供宏基因组学信息。
