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Effect of Light Quality on Growth and Fatty Acid Production in Chlorella vugaris Using Light Emitting Diodes
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 Title & Authors
Effect of Light Quality on Growth and Fatty Acid Production in Chlorella vugaris Using Light Emitting Diodes
Kim, Z-Hun; Kim, Dong Keun; Lee, Choul-Gyun;
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Microalgae are considered as superior biodiesel producers, because they could effectively produce high amount of lipid with fast growth rate. In this study, Chlorella vulgaris was exposed to various light wavelengths ( 470 nm, 525 nm, and 660 nm) using light emitting diodes (LEDs) to examine effect of light quality on their growth and fatty acid production in 0.4-L bubble column photobioreactors. Fluorescent lamps were also used as polychromatic light sources (control). From the results, biomass productivity was varied by light wavelength from 0.05 g/L/day to 0.30 g/L/day. Maximum biomass productivity was obtained from red LED among tested ones. We also observed that contents of oleic acid and linolenic acid, which affect biodiesel properties, were significantly changed depending on supplied wavelength. These results indicated that production of algal biomass, and fatty acid content and productivity could be improved or controlled by supplying specific light wavelength.
Biodiesel;Chlorella vulgaris;light quality;fatty acid;light emitting diode;
 Cited by
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