Scaling-up microbial fuel cells: configuration and potential drop phenomenon at series connection of unit cells in shared anolyte

ChemSusChem
Daehee KimIn-Seop Chang

Abstract

To scale-up microbial fuel cells (MFCs), installing multiple unit cells in a common reactor has been proposed; however, there has been a serious potential drop when connecting unit cells in series. To determine the source of the loss, a basic stack-MFC (BS-MFC) has been devised, and the results show that the phenomenon is due to ions on the anode electrode traveling through the electrolyte to be reduced at the cathode connected in series. As calculated by means of the percentage potential drop, the degree of potential drop decreased with an increase in the unit-cell distance. When the distance was increased from 1 to 8 cm, the percentage potential drop in BS-MFC1 decreased from 46.76 ± 0.90 to 45.08 ± 0.70 % and in BS-MFC2 from 46.41 ± 0.95 to 43.82 ± 2.23 %. As the p-value of the t-test was lower than 0.05, the difference was considered significant; however, if the unit cells are installed far enough from each other to avoid the potential drop phenomenon, the system will be less dense, consequently reducing the ratio of electrode area per volume of anode compartment and decreasing the power density of the system. Finally, this study suggests design criteria for scaling-up MFC systems: Multiple-electrode-installed MFCs are modu...Continue Reading

References

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Citations

Apr 19, 2013·Environmental Science & Technology·Stephen J AndersenRené A Rozendal
Jul 5, 2015·Bioresource Technology·Siti Mariam DaudWan Ramli Wan Daud
Nov 29, 2012·Bioresource Technology·N DegrenneI A Ieropoulos
Sep 26, 2013·Bioresource Technology·Vanessa Lanas, Bruce E Logan
May 6, 2014·Bioresource Technology·S Venkata MohanM Lenin Babu
Mar 19, 2013·Bioresource Technology·Pablo LedezmaIoannis Ieropoulos
Oct 26, 2018·ChemSusChem·Sara MateoManuel A Rodrigo
Aug 2, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Edson Baltazar Estrada-ArriagaFélix Loyola-Morales
Feb 20, 2018·Journal of Materials Chemistry. A, Materials for Energy and Sustainability·Toby P CallFelice Torrisi
Nov 8, 2017·Nature Communications·Marin SawaPeter J Nixon
Mar 27, 2021·The Science of the Total Environment·Zainab SyedAkhilendra Bhushan Gupta

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