Ter Heijne A.,Bornse Weilanden |
Ter Heijne A.,Center of Excellence for Sustainable Water Technology |
Liu F.,Bornse Weilanden |
Van Rijnsoever L.S.,Bornse Weilanden |
And 5 more authors.
Journal of Power Sources | Year: 2011
Scale-up studies of Microbial Fuel Cells are required before practical application comes into sight. We studied an MFC with a surface area of 0.5 m 2 and a volume of 5 L. Ferric iron (Fe 3+) was used as the electron acceptor to improve cathode performance. MFC performance increased in time as a combined result of microbial growth at the bio-anode, increase in iron concentration from 1 g L -1 to 6 g L -1, and increased activity of the iron oxidizers to regenerate ferric iron. Finally, a power density of 2.0 W m -2 (200 W m -3) was obtained. Analysis of internal resistances showed that anode resistance decreased from 109 to 7 mΩ m 2, while cathode resistance decreased from 939 to 85 mΩ m 2. The cathode was the main limiting factor, contributing to 58% of the total internal resistance. Maximum energy efficiency of the MFC was 41%. © 2010 Elsevier B.V. All rights reserved.