Flow dependent performance of microfluidic microbial fuel cells

Research output: Contribution to journalArticle

Authors

  • Talal T. Al-Housseiny
  • Yi Shen
  • Fiyinfoluwa O. Akinlawon
  • Saif T. Al-Housseiny
  • Ronald K. Hobson
  • Amaresh Sahu
  • Katherine I. Bedkowski
  • Thomas J. Dichristina
  • Howard A. Stone

Colleges, School and Institutes

External organisations

  • Princeton University
  • ETH Zurich
  • PURDUE UNIVERSITY
  • Morehouse College
  • Georgia Institute of Technology

Abstract

The integration of Microbial Fuel Cells (MFCs) in a microfluidic geometry can significantly enhance the power density of these cells, which would have more active bacteria per unit volume. Moreover, microfluidic MFCs can be operated in a continuous mode as opposed to the traditional batch-fed mode. Here we investigate the effect of fluid flow on the performance of microfluidic MFCs. The growth and the structure of the bacterial biofilm depend to a large extent on the shear stress of the flow. We report the existence of a range of flow rates for which MFCs can achieve maximum voltage output. When operated under these optimal conditions, the power density of our microfluidic MFC is about 15 times that of a similar-size batch MFC. Furthermore, this optimum suggests a correlation between the behaviour of bacteria and fluid flow.

Details

Original languageEnglish
Pages (from-to)12535-12543
Number of pages9
JournalPhysical Chemistry Chemical Physics
Volume16
Issue number24
Publication statusPublished - 28 Jun 2014