Abstract: The major engineering factors impacting on photosynthetic conversion efficiency (PCE) are analyzed, and the recent progress in PCE promotion with respect to engineering approaches is reviewed. The key issues to improve the PCE are improving the time and space distribution of light and regulating the fluid dynamic behavior in the photobioreactor (PBR). The practical approaches include the accommodation of the incident light energy, artificial importation of light into the PBR, optimization of geometry and structure of the PBR, design of internals in the PBR and optimization of the air flux and aeration zone in the PBR. For the further improvement of PCE, the light time-space distribution and fluid dynamic behavior should be optimized simultaneously in the PBR, and the development of PBR and optimization of culture process should be integrated in the further studies.

Key words: microalgae cultivation, photosynthetic conversion efficiency, photobioreactor, process optimization

摘要： 分析了光能转化率的研究现状及影响光能转化率的工程因素，综述了提高光能转化率的工程途径及研究进展. 从工程角度提高光能转化率的核心是改善光在反应器中的时空分布及反应器内的流体力学特征，具体方法包括优化入射光能量、根据培养阶段调整光源条件、人工导入光源、优化反应器几何形式和结构、流动内构件的设计和应用、通气量和通气区域优化等. 进一步提高光能转化率，需结合光的时空分布和流体流动，将工程和工艺因素相结合，开发反应器和优化工艺条件.

关键词: 微藻培养, 光能转化率, 光反应器, 过程优化