期刊
BIORESOURCE TECHNOLOGY
卷 268, 期 -, 页码 176-182出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.07.025
关键词
Micro-oxygen bioanode MFC(R-MO); Phenol degradation; Current production; Microbial community; Mechanism
资金
- Natural Science Foundation of China, China [51508551, 21577162]
- Ministry of Environmental Protection, China of the People's Republic of China (Major Science and Technology Program for Water Pollution Control and Treatment) [2014ZX07204-005]
- Ministry of Environmental Protection, China of the People's Republic of China (Research and Demonstration on High Standard Discharge Technology in Industrial Wastewater Plant) [2017ZX07107-003]
It is controversial to introduce oxygen into anode chamber as oxygen would decrease the CE (Coulombic efficiency) while it could also enhance the degradation of aromatics in microbial fuel cell (MFCs). Therefore, it is important to balance the pros and cons of oxygen in aromatics driven MFCs. A R-MO (micro-oxygen bioanode MFC) was designed to determine the effect of oxygen on electricity output and phenol degradation. The R-MO showed 6-fold higher phenol removal efficiency, 4-fold higher current generation than the R-AN (anaerobic bioanode MFC) at a cost of 26.9% decline in CE. The Zoogloea and Geobacter, which account for phenol degradation and current generation, respectively, were dominated in the R-MO bioanode biofilm. The biomass also showed great difference between R-MO and R-AN (114.3 +/- 14.1 vs. 2.2 +/- 0.5 nmol/g). Therefore, different microbial community, higher biomass as well as the different degradation pathway were suggested as reasons for the better performance in R-MO.
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