Light intensity affects the performance of photo microbial fuel cells with Desmodesmus sp. A8 as cathodic microorganism

Yi-cheng Wu, Ze-jie Wang, Yue Zheng, Yong Xiao, Zhao-hui Yang and Feng Zhao

Applied Energy, 2014, vol. 116, issue C, 86-90

Abstract: The performance of photo microbial fuel cells (photo-MFCs) with Desmodesmus sp. A8 as cathodic microorganism under different light intensities (0, 1500, 2000, 2500, 3000, 3500lx) was investigated. The results showed that illumination enhanced the output of the photo-MFC three-fold. When light intensity was increased from 0 to 1500lx, cathode resistance decreased from 3152.0 to 136.7Ω while anode resistance decreased from 13.9 to 11.3Ω. In addition, the cathode potential increased from −0.44 to −0.33V (vs. Ag/AgCl) and reached a plateau as the light intensity was increased from 1500lx to 3500lx. Accompanied with the potential change, dissolved oxygen (DO) within the cathode biofilm increased to 13.2mgL−1 under light intensity of 3500lx and dropped to 7.5mgL−1 at 1500lx. This work demonstrated that light intensity profoundly impacted the performance of photo-MFC with Desmodesmus sp. A8 through changing the DO.

Keywords: Biocathode; Photo microbial fuel cells; Green alga; Oxygen reduction reaction; Energy (search for similar items in EconPapers)
Date: 2014
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Citations: View citations in EconPapers (6)

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DOI: 10.1016/j.apenergy.2013.11.066

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