title: Evaluation of normalized energy recovery (NER) in microbial fuel cells affected by reactor dimensions and substrates.
abstract: The objective of this study is to provide an initial evaluation of normalized energy recovery (NER - a new parameter for presenting energy performance) in microbial fuel cells (MFCs) through investigation of the effects of reactor dimensions and anode substrates. Although the larger-size MFCs generally have lower maximum power densities, their maximum NER is comparable to that of the smaller MFCs at the same anolyte flow rate. The mixed messages obtained from the MFC size tests suggest that MFCs can be further scaled up without decreasing energy recovery under certain conditions. The low-strength substrates seem to be more suitable for MFC treatment of wastewater, in terms of both energy recovery and organic removal. However, because the MFCs could not achieve the maximum NER and the maximum organic removal efficiency at the same time, one must determine a major goal for MFCs treating wastewater between energy recovery and contaminant removal.
authors.affiliation: Department of Civil Engineering and Mechanics, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, United States.
authors.forename: Li
authors.initials: L
authors.lastname: Xiao
authors.affiliation: Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, United States.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Ge
authors.affiliation: Department of Civil Engineering and Mechanics, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, United States.
authors.forename: Patrick
authors.initials: P
authors.lastname: Kelly
authors.affiliation: Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, United States.
authors.forename: Fei
authors.initials: F
authors.lastname: Zhang
authors.affiliation: Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, United States. Electronic address: zhenhe@vt.edu.
authors.forename: Zhen
authors.initials: Z
authors.lastname: He
mesh_terms: D001674:Bioelectric Energy Sources; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology*; D003246:Conservation of Energy Resources; D004560:Electricity
keywords: Bioelectrochemical system; Bioenergy; Microbial fuel cell; Normalized energy recovery; Wastewater treatment