Effects of Glucose Addition and Light on Current Outputs in Photosynthetic Electrochemical Cells Using Synechocystis sp.PCC6714
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概要
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The effects of glucose addition and light on the current outputs in electrochemical cells using a cyanobacterium Synechocystis sp.PCC6714 were investigated under photo-and chemoheterotrophical conditions. The addition of glucose to the anode solutions of the electrochemical cells resulted in a rapid increase in the current outputs under both light and dark conditions. Although the coulombic outputs were almost the same between under light and dark conditions, the rate of glucose consumption was faster under illumination than in the dark. The total sugar content in the cells of strain PCC6714 increased with the addition of glucose and the total sugar accumulated remained intact during the discharge under illumination, while it decreased gradually in the dark. When the light was switched off after the addition of glucose, the current output markedly increased. The coulombic outputs obtained after darkening were 10 to 80 times larger than that obtained by the addition of glucose under the continuous light or dark conditions. Synechocystis sp.completely incorporated 0.14 mM and 0.42 mM glucose for 1h and 3h, respectively, under illumination. There was no difference in the coulombic outputs between 1h and 12h illumination times in the electrochemical cells with 0.14 mM glucose. When the light was switched off after 1h illumination in the electrochemical cells with 0.42 mM glucose, the coulombic output obtained from the electrochemical cell was lower than that in the electrochemical cell with 12h illumination. This indicates that the current output was produced with higher efficiency with glucose incorporated under illumination than that in the case of glucose incorporated after darkening. The highest coulombic yield of 54% in this experiment was obtained by darkening in the electrochemical cell with 0.14 mM glucose.
- 社団法人日本生物工学会の論文
- 1999-08-25
著者
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Sawayama Shigeki
Biomass Technology Research Center (BTRC), National Institute of Advanced Industrial Science and Tec
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Sawayama Shigeki
Biomass Research Group Institute For Energy Utilization National Institute Of Advanced Industrial Sc
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Ogi T
Institute For Energy Utilization National Institute Of Advanced Industrial Science And Technology
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YAGISHITA TATSUO
Biomass Division, National Institute for Resources and Environment
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TSUKAHARA KENICHIRO
Biomass Division, National Institute for Resources and Environment
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OGI TOMOKO
Biomass Division, National Institute for Resources and Environment
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Yagishita Tatsuo
Biomass Research Group Institute For Energy Utilization National Institute Of Advanced Industrial Sc
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Tsukahara Kenichiro
Biomass Research Group Institute For Energy Utilization National Institute Of Advanced Industrial Sc
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Sawayama Shigeki
Biomass Division National Institute For Resources And Environment Aist Miti
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