| Project/Area Number |
07555390
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 試験 |
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| Research Field |
Thermal engineering
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| Research Institution | Keio University |
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Principal Investigator |
TANISHITA Kazuo Keio University, Faculty Sci.Tech., Professor, 理工学部, 教授 (10101776)
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| Co-Investigator(Kenkyū-buntansha) |
FURUUNE Hiroyuki La Foret Engineering, Co.Ltd, Head Researcher, 技術部研究開発グループ, 主任研究員
IKEDA Mariko Keio University, Dept.of Biology, Professor, 文学部・生物学, 教授 (00051368)
SATO Haruki Keio University, Faculty Sci.Tech., Professor, 理工学部, 教授 (70137983)
TSUGE Hideki Keio University, Faculty Sci.Tech., Professor, 理工学部, 助教授 (70051688)
OKA Kotaro Keio University, Faculty Sci.Tech., Assistant Professor, 理工学部, 講師 (10276412)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1996: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | Microalgae / carbon dioxide fixation / flow adaptation / bioreactor / earth environment / Photo-enviroment / photosynthesis / life support for closed system |
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| Research Abstract |
The high performance of photosynthesis in the micro algae is required for gas excange system in CELSS system and fixing carbon dioxide in the atmosphere. Tubular photosynthetic bioreactors are desirable for achieving the efficient design of reactor because of the efficient way of illumination and producing the hydrodynamically mixing in the micro algae suspension. The purpose of this study is to measure the photosynthetic rate of micro algae and clarify the process of photosynthesis with the presence of hydrodyna flow in the tubular reactor system and find the optimum design of reactor achieving the maximum performa photosynthetic rate. Two types of reactors were employed for the prototype units. The first one (CDTR1) is coaxial double cylinder type and the second one (CDTR2) is a coaxial double cylinders with ribs on the inn surface of tubular reactor to mix suspension and scatter light. In high concentrated suspension, the oxygen production rate for the illumination from both outside and inside in CDTR2 was 1.5 times higher than that illumination from outside only in CDTR1. For higher flow rate in the tubular photobioreactor illumination condition for micro algae was improved and growth rate became larger. In micro algae tubular photobiorea with higher concentration, scattering light from both outside and inside which improves illumination condit for micro algae is effective for promoting the performance of photosynthesis.
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