Demonstration of hydrogenase electrode operation in a bioreactorстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация: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 H(2) 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 H(2)|2H(+) equilibrium potential. Furthermore. HE was able to catalyze the current generation (200 mu A) by consuming H(2) 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.