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Demonstration of hydrogenase electrode operation in a bioreactor

Paper ID Volume ID Publish Year Pages File Format Full-Text
17388 42665 2011 6 PDF Available
Title
Demonstration of hydrogenase electrode operation in a bioreactor
Abstract

This work describes the first step towards combination of the bioreactor with a starch-degrading microbial consortium and hydrogenase electrode (HE) in one unit for electricity generation. For this purpose, the bioreactor for microbial fermentation was designed with a set of electrodes (pH-sensor, Ag|AgCl reference electrode, Pt-electrode, and HE) inside the bioreactor. Potentials of all electrodes and H2 accumulation were monitored in the system under the precise pH control. Results obtained with the hydrogen-producing microbial consortium indicated that HE generates the potential equal to the H2|2H+ equilibrium potential. Furthermore, HE was able to catalyze the current generation (200 μA) by consuming H2 gas produced in the microbial consortium from starch. After 220 h of operation, HE retained at least 81% of the initial activity. Calculations of carbon balance indicated that fermentation products were similar in microbial cells without HE and with HE generating the current due to H2 consumption.

► Microbial reactor and hydrogenase electrode were combined for electricity generation. ► This combination was equipped by sensors and PC-based pH control system. ► Inside H2 producing microbial reactor hydrogen electrode generates electricity.

Keywords
Dark fermentative hydrogen production; Hydrogenase electrode; Electricity generation from biohydrogen
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Publisher
Database: Elsevier - ScienceDirect
Journal: Enzyme and Microbial Technology - Volume 49, Issue 5, 10 October 2011, Pages 453–458
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us