Modeling on chlorophyll a and phycocyanin production by Spirulina platensis under various light-emitting diodes

Published on Dec 1, 2010in Biochemical Engineering Journal3.371
· DOI :10.1016/j.bej.2010.09.004
Hua-Bing Chen5
Estimated H-index: 5
(NCHU: National Chung Hsing University),
Jiun-Yan Wu4
Estimated H-index: 4
(NCHU: National Chung Hsing University)
+ 5 AuthorsYung-Chuan Liu24
Estimated H-index: 24
(NCHU: National Chung Hsing University)
Abstract Light-emitting diodes (LEDs) with various light wavelengths (red, yellow, green, blue and white) and various levels of light intensity (750, 1500 and 3000 μmol m −2  s −1 ) are applied to study the effects of light sources on chlorophyll a (Chl) and phycocyanin (Phy) production of Spirulina platensis . Logistic rate equations are used to depict the kinetic behavior of algal growth and pigments formation under various light sources and intensities. According to the regression results, a red LED is the best for algae growth. On the other hand, yellow light gives the best specific Chl production rate with a light intensity of 750 or 1500 μmol m −2  s −1 , and blue light yields the best specific pigments (for Chl and Phy) production rates at 3000 μmol m −2  s −1 . From the model fitting results, it is found that, at a higher light intensity, a higher specific Chl production rate accompanied by a higher S. platensis biomass is obtained. However, as for Phy production, a higher biomass results in a lower specific Phy production rate. The only exception is the use of blue light, which shows a positive effect on both Chl and Phy production rates under a higher light intensity.
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The authors thank Research Foundation Flanders (FWO, grant nos. 1S16118N and 12D8917N) and EU Interreg V Vlaanderen-Nederland project 'De Blauwe Keten' for funding this research.
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