Simultaneous degradation of P-nitroaniline and electricity generation by using a microfiltration membrane dual-chamber microbial fuel cell |
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Authors: | Cui Lai Bisheng Li Ming Chen Guangming Zeng Danlian Huang Lei Qin Xigui Liu Min Cheng Jia Wan Chunyan Du Fanglong Huang Shiyu Liu Huan Yi |
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Affiliation: | 1. College of Environmental Science and Engineering, Hunan University, Changsha 410082, Hunan, PR China;2. Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, Hunan, PR China;3. School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114, PR China |
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Abstract: | Microfiltration membrane, a potential alternative for traditional proton exchange membrane (PEM) due to its strong ability of proton transfer, cost-effectiveness, sustainability and high anti-pollution capability in microbial fuel cell (MFC). In this study, a novel MFC using bilayer microfiltration membrane as separator, inoculated sludge as biocatalyst and P-nitroaniline (PNA) as electron donor was successfully constructed to evaluate its performance. Furthermore, we also investigated the effects of initial PNA concentration, co-substrate (acetate) and cultivated microorganisms on MFC performance. Results showed that the maximum power density of 4.43, 3.05, 2.62 and 2.18 mW m?2 was acquired with 50, 100, 150 and 300 mg L?1 of PNA as substrate, respectively. However, with the addition of 500 mg L?1 of acetate into reaction system contained 100 mg L?1 of PNA, the higher power production of 6.24 mW m?2 was obtained, which was 2.05 times higher than that using 100 mg L?1 of PNA as the sole substrate. Meanwhile, the MFC working on cultivated microorganisms displayed a maximal power density of 7.32 mW m?2 and a maximum PNA degradation efficiency of 54.75%. And after an electricity production cycle, the number of microbes in the anode chamber significantly increased. This study provides a promising technology for bioelectricity generation by biodegrading biorefractory pollutants in wastewater. |
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Keywords: | Microbial fuel cell P-nitroaniline Power density Degradation efficiency |
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