National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P.R. China.
Biotechnol Prog. 2013 Jan-Feb;29(1):127-34. doi: 10.1002/btpr.1641. Epub 2012 Nov 21.
Flat-plate photobioreactors (FPPBRs) are widely reported for cultivation of microalgae. In this work, a novel FPPBR mounted with inclined baffles was developed, which can make the fluid produce a "spirality" flow. The flow field and cell trajectory in the photobioreactor were investigated by using computational fluid dynamics. In addition, the cell trajectory was analyzed using a Fast Fourier transformation. The influence of height of the baffles, the angle α between the inclined baffle and fluid inlet flow direction (z), and the fluid inlet velocity on the frequency of flashing light effect and pressure drop were examined to optimize the structure parameters of the inclined baffles and operating conditions of the photobioreactor. The results showed that with inclined baffles built-in, significant swirl flow could be generated in the FPPBR. In this way, the flashing light effect for microalgal cell could also be achieved and the photosynthesis efficiency of microalgae could be promoted. In outdoor cultivation of freshwater Chlorella sp., the maximum biomass productivity of Chlorella sp. cultivated in the photobioreactor with inclined baffles was 29.94% higher than that of the photobioreactor without inclined baffles.
平板光生物反应器（FPPBR）广泛用于培养微藻。在这项工作中，开发了一种新型的装有倾斜挡板的 FPPBR，可使流体产生“螺旋”流。通过计算流体动力学研究了光生物反应器中的流场和细胞轨迹。此外，使用快速傅里叶变换分析了细胞轨迹。检查了挡板高度、倾斜挡板与流体入口流动方向（z）之间的夹角α和流体入口速度对闪光效果频率和压降的影响，以优化倾斜挡板的结构参数和光生物反应器的操作条件。结果表明，在 FPPBR 中内置倾斜挡板可以产生明显的旋流。这样，也可以实现微藻细胞的闪光效果，提高微藻的光合作用效率。在淡水小球藻的户外培养中，装有倾斜挡板的光生物反应器中培养的小球藻的最大生物量生产力比没有倾斜挡板的光生物反应器高 29.94%。
