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  

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

作　　者：黄建科[1] 康少锋[2] 李元广[1] 李伟[2] 

机构地区：[1]华东理工大学生物反应器工程国家重点实验室,上海200237 [2]华东理工大学化学工程联合国家重点实验室,上海200237

出　　处：《过程工程学报》2014年第2期304-311,共8页The Chinese Journal of Process Engineering

基　　金：国家重点基础研究发展计划(973)基金资助项目(编号:2011CB200903);国家自然科学基金资助项目(编号:31372548)

摘　　要：采用不同的光衰减模型对浓度0．06～2．68g／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，Comet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E和光散射系数乓分别为0．0014和0．9022m2／81随藻细胞中色素含量增加，Lambert—Beer模型中的消光系数屹和反增大，而E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Comet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3L平板式光生物反应器相比，15L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％．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 Comet model was the best one to describe and predict the light attenuation. The absorption coefficient of Comet model （Ea） and scattering coefficient （Es） were determined as 0.0014 and 0.902 2 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 Comet model of light attenuation. Under the same conditions, the time-averaged light intensity of algal cells within 15 L fiat 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.

关 键 词：光生物反应器 光衰减 模型 蛋白核小球藻 受光特性 

分 类 号：Q947.8[生物学—植物学]