کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
17388 | 42665 | 2011 | 6 صفحه PDF | دانلود رایگان |
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.
Journal: Enzyme and Microbial Technology - Volume 49, Issue 5, 10 October 2011, Pages 453–458