Simultaneous Investigation of Three Effective Parameters of Substrate, microorganism type and Reactor design on Power Generation in a Dual-Chamber Microbial Fuel Cells

Document Type: Research Paper

Authors

1 Department of Chemistry, University of Kashan, Ghotb-ravandi Blvd, Kashan 8731753153, Iran

2 Group, Energy department, Material and Energy Research Center

Abstract

The use of Microbial Fuel Cells (MFCs) has been expanded in recent years due to their ability in producing bioelectricity and treating wastewater simultaneously. However, there are still some obstacles to use MFC in industrial scale. Regardless of the restriction of electrodes applied in electron transferring process, there are also some other factors having strong roles in reducing power density of MFCs. In this paper, the effect of three categories of limiting factors such as kinds of microorganism (Saccharomyces cerevisiae and Shewanella sp.), substrate type (Glucose and acetate), and features reactor components have been investigated on the power density generation. Simultaneous investigation of these parameters and demonstration of which parameters would induce more power density can help to improve scale-up of MFCs. Based on results, utilizing of acetate in presence of both microorganisms led to approximately 60% higher power density compared to glucose. The comparison of maximum power densities of different reactor design indicated approximately 17-70 % increase of power generation. However, the resultant shows modification of reactor design even when other parameters are not optimal can increase power density more than three times. Actually, reactor design has the most important role on the power density with of the MFC while the effects of substrate and microorganism parameters are not inappreciable.

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