alexa Use of Bacterial Cellulose from Gluconacetobacter hansenii NOK21 as a Proton-permeable Membrane in Microbial Fuel Cells | OMICS International | Abstract
ISSN: 1948-5948

Journal of Microbial & Biochemical Technology
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Research Article

Use of Bacterial Cellulose from Gluconacetobacter hansenii NOK21 as a Proton-permeable Membrane in Microbial Fuel Cells

Young Hwan Ko*, Hwa Jeong Oh and Hyun Jung Lee

Department of Food Bioengineering, Jeju National University, Jejudo, Korea

*Corresponding Author:
Young Hwan Ko
Department of Food Bioengineering
Jeju National University, Jejudo, Korea
Tel: +82-64-754-3616
Fax: +82-64-755- 3601
E-mail: [email protected]

Received Date: March 19, 2015; Accepted Date: April 29, 2015; Published Date: May 06, 2015

Citation: Ko YH, Oh HJ, Lee HJ (2015) Use of Bacterial Cellulose from Gluconacetobacter hansenii NOK21 as a Proton-permeable Membrane in Microbial Fuel Cells. J Microb Biochem Technol 7:145-151. doi:10.4172/1948-5948.1000196

Copyright: © 2015 Ko YH, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited

Abstract

An acetic acid bacterium NOK21 from the pellicle on the surface of rancid wine was isolated and identified as Gluconacetobacter hansenii based on morphological, physiological, and genetic characteristics. When the bacterial isolate was grown in static broth containing ethanol, a maximum pellicle concentration of 5.2 g/? was obtained at 3% ethanol concentration and a maximum acidity of 3.97% was reached at 5% ethanol concentration. At ethanol concentrations higher than 6%, no bacterial growth was observed. Analysis with solid state 13C-NMR spectroscopy showed that the pellicle from the NOK21 culture was composed of a relatively pure cellulose polymer and had a few carboxylate (COO-) groups. Also, observation of the pellicle with SEM revealed a multi-layer network structure where nano-diameter cellulose fibers were tangled together at random. The pellicle cellulose polymer was used as a proton-permeable membrane in a microbial fuel cell (MFC) and had about a 3-fold higher efficiency for electric power generation than a cation exchange membrane Neosepta CMX. Moreover, electric power was generated stably at 150-200 mW/m2 per anode surface area. These results suggest that the microfibril cellulose membrane from the NOK21 culture may be suitable for use as an alternative to expensive proton exchange membranes in MFCs.

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