Development of a Novel Airlift Photobioreactor: Modeling, Particle Image Velocimetry Measurements, and Cultures,Chemical Engineering & Technology

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Development of a Novel Airlift Photobioreactor: Modeling, Particle Image Velocimetry Measurements, and Cultures
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2022-08-22 , DOI: 10.1002/ceat.202100639
Aiguo Feng _{1,

2} , Ting Zhang ₃ , Qiangui Zhu ₂ , Xinyi Ye ₂ , Chunjiang Liu ₁

Affiliation

Microalgae are commonly cultivated using photobioreactors (PBRs). To investigate Chlorella vulgaris productivity, a 2.5-L airlift photobioreactor (AL-PBR) with vertical and incline baffles was newly developed using computational fluid dynamics (CFD), particle image velocimetry (PIV) methods, and dark/light cultures. A significant increase in cell density and lipid accumulation rate (LAR) in the AL-PBR was observed. Hydrodynamic stresses including velocity fluctuation, pressure drop, looped bubble swarm, and vorticity magnitude were quantified in algae cultures, suggesting that microvortices induced light and CO₂ distribution regulated the algae plastid metabolism in the exponential phase of growth. This study provides a fundamental practice to the scale-up of bioreactors.

中文翻译：

新型气升式光生物反应器的开发：建模、粒子图像测速测量和培养

微藻通常使用光生物反应器 (PBR) 培养。为了研究小球藻的生产力，使用计算流体动力学 (CFD)、粒子图像测速 (PIV) 方法和暗/光培养新开发了具有垂直和倾斜挡板的 2.5 升气升式光生物反应器 (AL-PBR)。观察到 AL-PBR 中的细胞密度和脂质积累率 (LAR) 显着增加。在藻类培养中量化了包括速度波动、压降、环状气泡群和涡度大小在内的流体动力应力，这表明微涡流诱导的光和 CO ₂分布在指数生长阶段调节了藻类质体的代谢。该研究为生物反应器的放大提供了基本实践。

更新日期：2022-08-22

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