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Red and Blue Photons Can Enhance the Production of Astaxanthin from Haematococcus pluvialis
Z-Hun Kim,Ho-Sang Lee,이철균 한국조류학회I 2009 ALGAE Vol.24 No.2
The unicellular green alga, Haematococcus pluvialis, accumulates the highest level of astaxanthin among known astaxanthin-producing organisms. Light is the most important factor to induce astaxanthin by H. pluvialis. Blue and red LEDs, whose λmax’s are 470 and 665 nm, respectively, were used for internally illuminated light sources. Fluorescent lamps were also used for both internal and external illumination sources. The astaxanthin levels in these various lighting systems were analyzed and compared each other. The cultures under internally illuminated LEDs accumulated 20% more astaxanthin than those under fluorescent lamp. Furthermore, LEDs generated much less heat than the fluorescent lamps, which gives one more reason for the LEDs being a suitable internal light source for astaxanthin induction. The results reported here would lead novel designs of photobioreactors with improvements of illumination methods for high level of astaxanthin production. The maximum astaxanthin concentrations as well as the astaxanthin yield per supplied photon were increased by at least 20% when blue or red LEDs were supplied.
Kim, Z-Hun,Park, Hanwool,Lee, Ho-Sang,Lee, Choul-Gyun The Korean Society for Microbiology and Biotechnol 2016 Journal of microbiology and biotechnology Vol.26 No.7
A split-column photobioreactor (SC-PBR), consisting of two bubble columns with different sizes, was developed to enhance the photon utilization efficiency in an astaxanthin production process from Haematococcus lacustris. Among the two columns, only the smaller column of SC-PBR was illuminated. Astaxanthin productivities and photon efficiencies of the SC-PBRs were compared with a standard bubble-column PBR (BC-PBR). Astaxanthin productivity of SC-PBR was improved by 28%, and the photon utilization efficiencies were 28-366% higher than the original BC-PBR. The results clearly show that the effective light regime of SC-PBR could enhance the production of astaxanthin.
Red and Blue Photons Can Enhance the Production of Astaxanthin from Haematococcus pluviatis
Kim, Z-Hun,Lee, Ho-Sang,Lee, Choul-Gyun The Korean Society of Phycology 2009 ALGAE Vol.24 No.2
The unicellular green alga, Haematococcus pluvialis, accumulates the highest level of astaxanthin among knownastaxanthi.n-producing organisms. Light is the most important factor to induce astaxanthin by H. pluvialis. BIue andred LEDs, whose ${\lambda}_{max}$'s are 470 and 665 nm, respectively, were used for internally illuminated light sources.Fluorescent lamps were also used for both internal and external illumination sources. The astaxanthin levels in thesevarious lighting systems were analyzed and compared each other. The cultures under internally illuminated LEDsaccumulaled 20% more astaxanthin than those under fluorescent lamp. Furthermore, LEDs generated much lessheat than the fluorescent lamps, which gives one more reason for the LEDs being a suitable internal Light source forastaxanthin induction. The results reported here would lead novel designs of photobioreactors with improvementsof illumination methods for high level of astaxanthm production. The maximum astaxanthin concentrations as wellas the astaxanthin yield per supplied photon were increased by at least 20% when blue or red LEDs were supplied.