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›› 2014, Vol. 14 ›› Issue (2): 304-311.

• 生化工程专栏 • 上一篇    下一篇

蛋白核小球藻的光衰减模型及藻细胞受光特性参数的模拟

黄建科 康少锋 李元广 李伟1   

  1. 华东理工大学生物反应器国家重点实验室 华东理工大学化学工程联合国家重点实验室 华东理工大学生物反应器国家重点实验室 华东理工大学化学工程联合国家重点实验室
  • 收稿日期:2014-02-17 修回日期:2014-03-27 出版日期:2014-04-20 发布日期:2014-04-20
  • 通讯作者: 李元广

Light Attenuation Models and Simulation of Light Regime Characteristics of Chlorella pyrenoidosa Cells

HUANG Jian-ke KANG Shao-feng LI Yuan-guang LI Wei   

  1. State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology Institute of Marine Bioprocess Engineering, State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology Inst.Marine Bioprocess Eng., East China Univ. Sci. Technol Institute of Marine Bioprocess Engineering, State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology Inst.Marine Bioprocess Eng., East China Univ. Sci. Technol
  • Received:2014-02-17 Revised:2014-03-27 Online:2014-04-20 Published:2014-04-20
  • Contact: LI Yuan-guang

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摘要： 采用不同的光衰减模型对浓度0.06~2.68 g/L的蛋白核小球藻藻液中光的衰减特性进行对比. 结果表明，Cornet模型能较好地描述和预测藻液中光的衰减特性，光吸收系数Ea和光散射系数Es分别为0.0014和0.9022 m2/g；随藻细胞中色素含量增加，Lambert-Beer模型中的消光系数Ka和Es增大，而Ea减小. 与高藻细胞浓度相比，低藻细胞浓度时藻细胞中色素含量对藻液中光衰减程度影响更显著. 结合计算流体力学和Cornet光衰减模型计算了平板式光生物反应器中藻细胞受光特性参数，在相同的外部条件下，与3 L平板式光生物反应器相比，15 L平板式光生物反应器中的藻细胞时均光强平均下降35.5%，藻细胞光暗循环周期平均增加78.1%.

关键词: 光生物反应器, 光衰减, 模型, 蛋白核小球藻, 受光特性

Abstract: Different models were used to describe the light attenuation of Chlorella pyrenoidosa cells in the concentration range of 0.06~2.68 g/L. The results showed the Cornet model was the best one to describe and predict the light attenuation. The absorption coefficient of Cornet model (Ea) and scattering coefficient (Es) were determined as 0.0014 and 0.9022 m2/g, respectively. The absorption coefficient of Lambert-Beer model (Ka) and Ea increased with the increase of pigment content, but Es decreased. The pigment content of cells more significantly influenced the degree of light attenuation when the biomass concentration was low. The light regime characteristics of algae cells were calculated based on the integration of CFD and Cornet model of light attenuation. Under the same conditions, the time-averaged light intensity of algal cells within 15 L flat plate photobioreactor was decreased by 35.5%, and frequency of light dark cycle inside the photobioreactor increased by 78.1% compared with those in the 3 L flat plate photobioreactor.

Key words: photobioreactor, light attenuation, model, Chlorella pyrenoidosa, light regime characteristics

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