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Developent of cascade photo-bioreactor for the fixation of carbon dioxide

Research Project

Project/Area Number 09555075
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Thermal engineering
Research InstitutionKeio University

Principal Investigator

TANISHITA Kazuo  Keio University, Faculty Sci.Tech., Professor, 理工学部, 教授 (10101776)

Co-Investigator(Kenkyū-buntansha) FURUUNE Hiroyui  La Foret Engineering Co.Ltd., Chief researcher, 主任研究員
IKEDA Mariko  Keio University, Dept.of Biology, Professor, 文学部・生物学, 教授 (00051368)
NAGASAKA Yuji  Keio University, Faculty Sci.Tech., Professor, 理工学部, 教授 (40129573)
TSUGE Hideki  Keio University, Faculty Sci.Tech., Professor, 理工学部, 教授 (70051688)
OKA Kotaro  Keio University, Faculty Sci.Tech., Associate Professor, 理工学部, 助教授 (10276412)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥13,100,000 (Direct Cost: ¥13,100,000)
Fiscal Year 1998: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 1997: ¥10,300,000 (Direct Cost: ¥10,300,000)
Keywordscarbon dioxide fixation / microalgae / photosynthesis / fluorescent reflector / photo-reactor / improvement of photosynthesis / light environment
Research Abstract

we designed the new reactor with reflectors to reduce the energy loss of the light source and propose the fluorescent reflector that shifts wavelength from green region to red region for effective photosynthesis. In present study, we evaluated the effect of a bioreactor using silver reflector (5-Ref.) and fluorescent reflector (F-Ref.) on photosynthetic rates, and investigated the influence of spectral shifting by fluorescent reflector on algal cells.
Base polyethylene terephthalate (PET) sheet was sputtered with silver and covered with PET film as a S-Ref. (94%Reflectivity). As a F-Ref. (59%Reflectivity), fluorescent dye (Lumogen F-Red 300, BASF Japan Ltd.) was coated on the S-Ref. A black curtain was used as control. Coaxial double tubular photobioreactors were used for measurements, which contain light sources inside and algal culture outside (light path of algal suspension is 2.3 mm) and were covered with these reflectors with perfusing culture of green algae Chlorella vulgaris IAM … More C-27. After preculture of 3 days, the algal culture were perfused in the photobioreactors. Oxygen production was measured as photosynthetic rates. As influence of spectral shifting by fluorescent reflector on algal cells, cell concentration, cell volume and absorption spectrum were measured during 8 days.
At 40W/m2 irradiation in control, in spite of five-fold increase of cell concentration (=0.344g/l), O2 production rate rose only 1.7-fold. But S-Ref. rose 2.3-fold 02 production rate in control (cell concentration=O.344 g/l), and 2.0-fold in F-Ref. So these reflectors, especially S-Ref. Utilizes energy more efficiently. However F-Ref. was superior to S-Ref. with 1.7 times in O2 production rate per reflected light energy, in which the spectral shifting by F-Ref. is effective for photosynthesis. Although the growth curve of S-Ref. is similar to one of S-Ref., the composition of the cells after 16 hrs is different : mother cells are dominant in S-Ref., and daughter cells are dominant in F-Ref. These result imply that the red light accelerated the cell fission, and the small daughter cells (high surface / volume ratio) also improve the lighting condition in the bioreactor. Less

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] 谷下一夫: "光合成バイオリアクターの性能改善" 日本機械学会第10回バイオエンジニアリング講演会講演論文集. 162-164 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 谷下一夫 他: "光源内蔵型藻類バイオリアクターにおける光環境の改善" 日本機械学会第10回バイオエンジニアリング講演会論演論文集. 169-170 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 谷下一夫 他: "閉鎖生態系における微細藻類培養" 日本機械学会第11回バイオエンジニアリング講演会講演論文集. 216-217 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Tanishita, K.et al.: "Augmentation of axial despersion by intermittent oscillatory flow" Trans.ASME, J.of Biomech.Eng.120. 405-415 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Tanishita, K.et al.: "Effect of microscopic motion of microalgae on the light environment" Proc.of the 9th Conf.of Bioengineering, JSME. 87-88 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Tanishita, K.: "Fully developed intermittent flow in a curved tube" J.Fluid Mech.Vol.347. 263-287 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Tanishita, K.et al.: "Improvement of photosynthetic efficiency in the photo-bioreactor" Proc.of the 10th Conf.of Bioengineering, JSME. 162-164 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Tanishita, K.et al.: "Improvement of light environment in the photo-bioreactor with the internal light source" Proc.of the 10th Conf.of Bioengineering, JSME. 169-170 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Tanishita, K.et al.: "Effect of microalgae cell motion upon photo-environment in the bioreactor" Third World Congress of Biomechanics. 502 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Tanishita, K.: "Augmentation of axial dispersion by intermittent oscillatory flow, Trans.ASME" J.of Biomechanical Eng.Vol.120. 405-415 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Tanishita, K.et al.: "Culture of microalgae in the closed environment system" Proc.of the 11th Conf.of Bioengineering, JSME. 216-217 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 谷下一夫: "光合成バイオリアクターの性能改善" 日本機械学会第10回バイオエンジニアリング講演会講演論文集. 162-164 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 谷下一夫 他: "光源内蔵型藻類バイオリアクターにおける光環境の改善" 日本機械学会第10回バイオエンジニアリング講演会講演論文集. 169-170 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 谷下一夫: "閉鎖生態系における微細藻類培養" 日本機械学会第11回バイオエンジニアリング講演会講演論文集. (予定). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 谷下一夫 ほか: "微細藻類の運動による微視的光環境への影響" 第9回バイオエンジニアリング講演会、講演論文集. 87-88 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 谷下一夫 ほか: "光源内蔵型藻類バイオリアクターにおける光環境の改善" 第10回バイオエンジニアリング講演会、講演論文集. 169-170 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 谷下一夫: "光合成バイオリアクターの性能改善" 第10回バイオエンジニアリング講演会、講演論文集. 162-164 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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