1992 Fiscal Year Final Research Report Summary
Photosynthetic CO2-fixation and hydrogen production by marine microalgae
| Project/Area Number |
02650688
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
化学工学
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| Research Institution | Osaka University |
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Principal Investigator |
MIYAMOTO Kazuhisa Osaka Univ., Pharmac. Sci., Professor, 薬学部, 教授 (30028849)
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| Co-Investigator(Kenkyū-buntansha) |
HIRATA Kazumasa Osaka Univ., Pharmac. Sci., Research Assoc, 薬学部, 助手 (30199062)
YAGI Kiyohito Osaka Univ., Pharmac. Sci., Assoc. Prof, 薬学部, 助教授 (70166479)
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| Project Period (FY) |
1990 – 1992
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| Keywords | Marine microalgae / Photosynthesis / CO_2-fixation / Hydrogen production / Green algae / Energy conversion |
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| Research Abstract |
One of the urgent environmental problems today is the global warming caused mainly by increasing amount of atmospheric CO_2. The use of photosynthetic microalgae to help to solve this problem has been proposed in a variety of approaches, because the cultivation of them is able to fix CO_2 and produce energy and chemical compounds by the use of sunlight. We have proposed a biological system that converts sunlight to hydrogen energy with the aid of microalgae and photosynthetic bacteria. A marine green alga and a marine photosynthetic bacterium both having high H_2 evolution activities have been isolated and characterized with respective to their H_2 metabolism. A low H_2 yield in algal fermentation could be overcome by using the photosynthetic bacterium, because it produces H_2 from organic compounds secreted by the algal cells exhibiting a high conversion yield of 10.7 mol H_2 per mol of starch-glucose.
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