Electricity generation from model organic wastewater in a cassette-electrode microbial fuel cell

A new highly scalable microbial fuel cell (MFC) design, consisting of a series of cassette electrodes (CE), was examined for increasing power production from organic matter in wastewater. Each CE chamber was composed of a box-shaped flat cathode (two air cathodes on both sides) sandwiched in between...

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Bibliographic Details
Published in:	Applied microbiology and biotechnology Vol. 80; no. 2; pp. 325 - 330
Main Authors:	Shimoyama, Takefumi, Komukai, Shoko, Yamazawa, Akira, Ueno, Yoshiyuki, Logan, Bruce E, Watanabe, Kazuya
Format:	Journal Article
Language:	English
Published:	Berlin/Heidelberg Berlin/Heidelberg : Springer-Verlag 01-08-2008 Springer Berlin Heidelberg Springer Springer Nature B.V
Subjects:	Animals Bacteria - metabolism Bioelectric Energy Sources - microbiology Biological and medical sciences biomass Bioreactors - microbiology Biosensors Biotechnology Carbon Chemical oxygen demand Cod Conservation of Energy Resources - methods Design Electric power generation Electricity Electricity generation Electrodes Electrodes - microbiology energy recovery Environmental Biotechnology Fishes Fuel cells Fuel technology Fundamental and applied biological sciences. Psychology Graphite Industrial wastes Laboratories Life Sciences Load distribution Membranes Methods. Procedures. Technologies Microbial fuel cell Microbial Genetics and Genomics Microbiology Organic loading Organic matter Organic waste Peptones Sewage - microbiology Soil Microbiology Studies Various methods and equipments wastewater Wastewater treatment Water Organic waste Microbial fuel cell Energy recovery Biomass Wastewater biofuel cell Microbial electrode Microbial fuel cell, Energy recovery, Organic waste Biosensor Models Electric power production Biomass, Wastewater Waste water
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Summary:	A new highly scalable microbial fuel cell (MFC) design, consisting of a series of cassette electrodes (CE), was examined for increasing power production from organic matter in wastewater. Each CE chamber was composed of a box-shaped flat cathode (two air cathodes on both sides) sandwiched in between two proton-exchange membranes and two graphite-felt anodes. Due to the simple design of the CE-MFC, multiple cassettes can be combined to form a single unit and inserted into a tank to treat wastewater. A 12-chamber CE-MFC was tested using a synthetic wastewater containing starch, peptone, and fish extract. Stable performance was obtained after 15 days of operation in fed-batch mode, with an organic removal efficiency of 95% at an organic loading rate of 2.9 kg chemical oxygen demand (COD) per cubic meter per day and an efficiency of 93% at 5.8 kg COD per cubic meter per day. Power production was stable during this period, reaching maximum power densities of 129 W m⁻³ (anode volume) and 899 mW m⁻² (anode projected area). The internal resistance of CE-MFC decreased from 2.9 (day 4) to 0.64 Ω (day 25). These results demonstrate the usefulness of the CE-MFC design for energy production and organic wastewater treatment.
Bibliography:	http://dx.doi.org/10.1007/s00253-008-1516-0
ISSN:	0175-7598 1432-0614
DOI:	10.1007/s00253-008-1516-0