Skip to main content

Energy Production in Mediator-Less Microbial Fuel Cells with High Internal Resistance: The Effects of Nitrate and Sulfate

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

Abstract:

Microbial fuel cells (MFCs) simultaneously provide waste treatment while capturing energy in the form of electricity. These devices are being deployed in engineered and natural environments where nitrate or sulfate may inhibit power production, but the effects of these electron acceptors have not been fully explored. This research investigated the effect of nitrate and sulfate on MFC power production when these chemicals are present at the anode. Nitrate decreased the maximum current and power density by 15% and 17% respectively when present at 20 mg/L and sulfate caused the maximum current and power density to decrease by 4% and 7% respectively (also at 20 mg/L). Stronger inhibition was observed at higher nitrate and sulfate concentrations, but power production persisted. Coulombic efficiency decreased as nitrate and sulfate levels increased, but this was not primarily due to the biochemical reduction of nitrate or sulfate, but probably because of the inhibition of exoelectrogens.

Keywords: Microbial fuel cells; coulombic efficiency; internal resistance; nitrate; sulfate

Document Type: Research Article

DOI: https://doi.org/10.2175/193864709793955816

Publication date: 2009-01-01

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Learn about the many other WEF member benefits and join today
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more