화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.12, No.5, 745-748, September, 2006
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Productive Encystment of Haematococcus pluvialis by Controlling a Specific Irradiation Rate in a Photoautotrophic Induction System for Astaxanthin Production
Chang Duk Kang, Jin Suk Lee1, Tai Hyun Park, and Sang Jun Sim2, †
  • School of Chemical and Biological Engineering, Seoul National University, Seoul 151-744, Korea
  • 1Biomass Research Team, Korea Institute of Energy Research, Daejeon 305-343, Korea
  • 2Department of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Korea
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A productive photoautotrophic induction system was established for the production of antioxidative astaxanthin by the green microalga Haematococcus pluvialis. During photoautotrophic induction, N-deprived Haematococcus cells were sensitive to the specific irradiation rate (I) on transformation to astaxanthin-rich cyst cells. Compared with the CO2 condition, the optimum specific irradiation rate (Iopt) was confined within narrow limits between light limitation and inhibition. Maximal astaxanthin synthesis in H. pluvialis was promoted under a 5 % CO2 environment and unsynchronized illumination with a specific irradiation rate of 80 μmol photon/gㆍs, yielding an accumulation rate of 4.3 mg/gㆍday. This result indicates that a favorable CO2 concentration and controlled specific irradiation rate leads to the productive encystment of H. pluvialis and enhanced astaxanthin synthesis.
Keywords:astaxanthin;Haematococcus pluvialis;specific irradiation rate;CO2;photoautotrophic induction
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