Simultaneous organics removal and nitrification using a novel nitrifying biocathode microbial fuel cell (MFC) reactor were investigated in this study. Remarkably, the introduction of nitrifying biomass into the cathode chamber caused higher voltage outputs than that of MFC operated with the abiotic cathode. Results showed the maximum power density increased 18% when cathode was run under the biotic condition and fed by nitrifying medium with alkalinity/NH4+-N ratio of 8 (26 against 22 mW/m2). The voltage output was not differentiated when NH4+-N concentration was increased from 50 to 100 mg/L under such alkalinity/NH4+-N ratio. However, interestingly, the cell voltage rose significantly when the alkalinity/NH4+-N ratio was decreased to 6. Consequently, the maximum power density increased 68% in compared with the abiotic cathode MFC (37 against 22 mW/m2). Polarization curves demonstrated that both activation and concentration losses were lowered during the period of nitrifying biocathode operation. Ammonium was totally nitrified and mostly converted to nitrate in all cases of the biotic cathode conditions. High COD removal efficiency (98%) was achieved. In light of the results presented here, the application of nitrifying biocathode is not only able to integrate the nitrogen and carbon removal but also to enhance the power generation in MFC system. Our system can be suggested to open up a new feasible way for upgrading and retrofitting the existing wastewater treatment plant by the use of MFC-based technologies.
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Research Article|
May 01 2009
Nitrifying biocathode enables effective electricity generation and sustainable wastewater treatment with microbial fuel cell
Hung-Thuan Tran;
1Division of Environmental Engineering and Biotechnology, Myongji University, San 38-2 Namdong, Yongin Kyonggido 449-728, South Korea E-mail: thuan_th@mju.ac.kr; goodluckday@hanmail.net; kose123@naver.com; kashifrsl@yahoo.com; dhahn@mju.ac.kr
E-mail: thuan_th@mju.ac.kr
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Dae-Hee Kim;
Dae-Hee Kim
1Division of Environmental Engineering and Biotechnology, Myongji University, San 38-2 Namdong, Yongin Kyonggido 449-728, South Korea E-mail: thuan_th@mju.ac.kr; goodluckday@hanmail.net; kose123@naver.com; kashifrsl@yahoo.com; dhahn@mju.ac.kr
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Se-Jin Oh;
Se-Jin Oh
1Division of Environmental Engineering and Biotechnology, Myongji University, San 38-2 Namdong, Yongin Kyonggido 449-728, South Korea E-mail: thuan_th@mju.ac.kr; goodluckday@hanmail.net; kose123@naver.com; kashifrsl@yahoo.com; dhahn@mju.ac.kr
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Kashif Rasool;
Kashif Rasool
1Division of Environmental Engineering and Biotechnology, Myongji University, San 38-2 Namdong, Yongin Kyonggido 449-728, South Korea E-mail: thuan_th@mju.ac.kr; goodluckday@hanmail.net; kose123@naver.com; kashifrsl@yahoo.com; dhahn@mju.ac.kr
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Doo-Hyun Park;
Doo-Hyun Park
2Department of Biological Engineering, Seokyeong University, Seoul 136-704, South Korea E-mail: baakdoo@naver.com
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Rui-Hong Zhang;
Rui-Hong Zhang
3Department of Biological and Agricultural Engineering, University of California, Davis, One Shields Avenue, Davis CA 95616, USA E-mail: rhzhang@ucdavis.edu
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Dae-Hee Ahn
Dae-Hee Ahn
1Division of Environmental Engineering and Biotechnology, Myongji University, San 38-2 Namdong, Yongin Kyonggido 449-728, South Korea E-mail: thuan_th@mju.ac.kr; goodluckday@hanmail.net; kose123@naver.com; kashifrsl@yahoo.com; dhahn@mju.ac.kr
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Water Sci Technol (2009) 59 (9): 1803–1808.
Citation
Hung-Thuan Tran, Dae-Hee Kim, Se-Jin Oh, Kashif Rasool, Doo-Hyun Park, Rui-Hong Zhang, Dae-Hee Ahn; Nitrifying biocathode enables effective electricity generation and sustainable wastewater treatment with microbial fuel cell. Water Sci Technol 1 May 2009; 59 (9): 1803–1808. doi: https://doi.org/10.2166/wst.2009.209
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