0 2 2 g
Home About us MoEF Contact us Sitemap Tamil Website  
About Envis
Whats New
Research on Microbes
Microbiology Experts
Online Submission
Access Statistics

Site Visitors

blog tracking

Vol. 106, 2015, Pages: 379–382

Conjugated oligoelectrolyte represses hydrogen oxidation by Geobacter sulfurreducens in microbial electrolysis cells

Jia Liu, Huijie Hou, Xiaofen Chen, Guillermo C. Bazan, Hiroyuki Kashima, Bruce E. Logan

Department of Civil and Environmental Engineering, Pennsylvania State University, University Park, PA 16801, United States.


A conjugated oligoelectrolyte (COE), which spontaneously aligns within cell membranes, was shown to completely inhibit H2 uptake by Geobacter sulfurreducens in microbial electrolysis cells. Coulombic efficiencies that were 490 ± 95%, due to H2 recycling between the cathode and microorganisms on the anode, were reduced to 86 ± 2% with COE addition. The use of the COE resulted in a 67-fold increase in H2 gas recovery, and a 4.4-fold increase in acetate removal. Current generation, H2 recovery and COD removals by Geobacter metallireducens, which cannot use H2, were unaffected by COE addition. These results show that this COE is an effective H2 uptake inhibitor, and that it can enable improved and sustained H2 gas recovery in this bioelectrochemical system.

Graphical abstract

Keywords: Microbial electrolysis cells; Geobacter sulfurreducens; Conjugated oligoelectrolyte; H2 uptake inhibition; Energy recovery.

Copyright © 2005 ENVIS Centre ! All rights reserved
This site is optimized for 1024 x 768 screen resolution