Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 51, Pages 34985-34990Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b11064
Keywords
anodophilic biofilm; hydrogel scaffold; aerotolerant bioanode; microbial fuel cell; immobilization
Funding
- National Natural Science Foundation of China [21464008, 51678281]
- Science and Technology Project of Jiangxi Province [20143ACB21015, 20161BCB24005]
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The anodophilic bacteria in the anodes of microbial fuel cells (MFCs) used to catalyze carbon oxidation are anaerobes and require anaerobic conditions; their bioelectrocatalytic activity will be greatly suppressed upon direct exposure to O-2. In this study, an aerotolerant bioanode was fabricated for the first time by immobilization of anodophilic bacteria for use in MFCs operating under aerobic conditions. The fabrication of the aerotolerant bioanode was realized through the electrochemically induced penetration and propagation of anodophilic bacteria in a three-dimensional hydrogel scaffold. Under the protection of the hydrogel scaffold, the anodophilic bacteria exhibited excellent bioelectrocatalytic activity under continuous O-2 aeration and delivered a current density comparable to that under anaerobic conditions. The MFC equipped with the aerotolerant bioanode has the potential to be applied to traditionally aerobic wastewater treatment (WWT) technology. This study offers new insight into the application of MFCs for WWT.
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