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Received March 17, 2010
Accepted April 17, 2010
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Hydrogen production from wastewater using a microbial electrolysis cell

Department of Environmental Engineering and Biotechnology, Myongji University, San 38-2 Namdong, Yongin, Kyonggido 449-728, Korea 1Advanced Materials Technology Center, National Center for Technological Progress, C6 Thanh Xuan Bac, Thanh Xuan, Hanoi, Vietnam 2Department of Biological and Agricultural Engineering, University of California,Davis, One Shields Avenue, Davis, CA 95616, USA
dhahn@mju.ac.kr
Korean Journal of Chemical Engineering, November 2010, 27(6), 1854-1859(6), 10.1007/s11814-010-0310-8
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Abstract

A Microbial electrolysis cell (MEC) was designed to produce a useful and valuable product, hydrogen gas, during the wastewater treatment process. Hydrogen can be produced using the MEC with an applied voltage of over 0.4 V, and the hydrogen yields gradually increased with the increasing of applied voltage. A maximum overall hydrogen efficiency of 21.2% was achieved at an applied voltage of 1.0 V with acetate as substrate, corresponding to a volumetric hydrogen production rate of approximately 0.095 m3 H2/m3 reactor liquid volume/day. A volumetric hydrogen production rate of 0.061 m3 H2/m3 reactor liquid volume/day was achieved when piggery wastewater was fed to the MEC, and the chemical oxygen demand removal rate ranged from 45 to 52%. The results demonstrated that the wastewater, especially an organic-rich item such as piggery wastewater, could be feasibly treated based on this MEC system.

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