Skip to main content

Biological Chromium(VI) Reduction in Microbial Fuel Cell: A Three in One Approach

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial


Chromium(VI) reduction in the cathode of a microbial fuel cell (MFC) was investigated. An Htype MFC was operated with anaerobic anode and cathode compartments. The anode compartment was inoculated with an acetate-oxidizing mixed culture and the cathode compartment was inoculated with a mixture of denitrifying and anaerobic cultures enriched in the presence of Cr(VI). Acetate was provided to the anode compartment as substrate and bicarbonate was added to the cathode compartment as the sole inorganic carbon source. Fast Cr(VI) removal in the cathode compartment was observed along with acetate oxidation in the anode chamber and current generation. A maximum Cr(VI) reduction rate of 0.46 mg Cr(VI)/g VSSĀ·h was achieved, which resulted in a current and power density of 123.4 mA/m2 and 55.5 mW/m2, respectively. The reduced chromium was non-detectable in the supernatant of the catholyte, which indicates complete removal of chromium as Cr(OH)3 precipitate. The contribution of biomass decay and abiotic processes on Cr(VI) reduction was minimal, confirming that most of the Cr(VI) reduction was assisted by microbial activity in the cathode, which utilizes electrons and protons from the oxidation of acetate in the anode compartment. Analysis of the 16S rRNA gene based clone-library revealed that the cathode biomass was largely dominated by phylotypes closely related to Trichococcus pasteurii and Pseudomonas aeruginosa.

Keywords: Chromium(VI) reduction; Microbial Fuel Cells; Power generation; Wastewater treatment

Document Type: Research Article


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 These proceedings are not peer reviewed.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free ContentFree content
  • Partial Free ContentPartial Free content
  • New ContentNew content
  • Open Access ContentOpen access content
  • Partial Open Access ContentPartial Open access content
  • Subscribed ContentSubscribed content
  • Partial Subscribed ContentPartial Subscribed content
  • Free Trial ContentFree trial content
Cookie Policy
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