Effect of simple shear flow on photosynthesis rate and morphology of micro algae

S. Mitsuhashi, M. Fujimoto, H. Muramatsu, K. Tanishita

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The convective motion of micro algal suspension gives an advantageous effect on the photosynthetic rate in the bioreactor, however, the nature of convective effect on the photosynthesis has not been fully understood. The propose of this study concerns the nature of photosynthetic rate in a well-defined hydrodynamic shear flow of Spirulina platensis suspension, generated in a double rotating coaxial cylinders. The double rotating coaxial cylinders was installed in the incubator chamber with the controlled illumination intensity and temperature. Two kind of experiments, short and long term experiments, were performed to evaluate the direct effect of shear flow on the photosynthetic rate. The short term experiment indicates that the simple shear flow enables to augment the photosynthesis of Spirulina suspension and simultaneously causes the cell destruction due to the excessive shear stress. The long term experiment for 100 hours reveals that the growth rate and the morphology of Spirulina is sensitive to the external fluid mechanical stimulus. The long term application of mechanical stress on the algae may result in the adaptation of the photosynthetic function and morphology.

Original languageEnglish
Pages (from-to)179-187
Number of pages9
JournalActa Astronautica
Volume33
Issue numberC
DOIs
Publication statusPublished - 1994
Externally publishedYes

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Photosynthesis
Shear flow
Algae
Experiments
Bioreactors
Shear stress
Hydrodynamics
Lighting
Fluids
Temperature

ASJC Scopus subject areas

  • Aerospace Engineering

Cite this

Effect of simple shear flow on photosynthesis rate and morphology of micro algae. / Mitsuhashi, S.; Fujimoto, M.; Muramatsu, H.; Tanishita, K.

In: Acta Astronautica, Vol. 33, No. C, 1994, p. 179-187.

Research output: Contribution to journalArticle

Mitsuhashi, S, Fujimoto, M, Muramatsu, H & Tanishita, K 1994, 'Effect of simple shear flow on photosynthesis rate and morphology of micro algae', Acta Astronautica, vol. 33, no. C, pp. 179-187. https://doi.org/10.1016/0094-5765(94)90123-6
Mitsuhashi, S. ; Fujimoto, M. ; Muramatsu, H. ; Tanishita, K. / Effect of simple shear flow on photosynthesis rate and morphology of micro algae. In: Acta Astronautica. 1994 ; Vol. 33, No. C. pp. 179-187.
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