title: Light/dark cycle of microalgae cells in raceway ponds: Effects of paddlewheel rotational speeds and baffles installation.
abstract: The aim of this work was to study the light/dark (L/D) cycle in raceway ponds (RWPs) by the computational fluid dynamics (CFD) method via determining the hydrodynamics of culture media and cell trajectories. The effects of paddlewheel rotational speed and flow-deflector baffles installation on the L/D cycle were analyzed. The results indicated that, the L/D cycles of microalgae cells decreased with the increase of the paddlewheel rotational speeds, when the paddlewheel rotational speeds ranged from 5 to 12rpm. In addition, the installation of the flow-deflector baffles in RWPs can greatly increase the light time and the ratio of light time to L/D cycle for microalgae cells. The study provided an effective method to characterize the L/D cycles in RWPs, and may have important implications for designing the effective large-scale microalgae culture system.
authors: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China; School of Mechanical and Energy Engineering, Jimei University, Xiamen 361021, China.
authors: Zhijie
authors: Z
authors: Chen
authors: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China.
authors: Xinru
authors: X
authors: Zhang
authors: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China. Electronic address: zyjiang@ustb.edu.cn.
authors: Zeyi
authors: Z
authors: Jiang
authors: School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China.
authors: Xuehui
authors: X
authors: Chen
authors: School of Mechanical and Energy Engineering, Jimei University, Xiamen 361021, China.
authors: Hongzhou
authors: H
authors: He
authors: School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China.
authors: Xinxin
authors: X
authors: Zhang
mesh_terms: D057446:Hydrodynamics; D008027:Light; D058086:Microalgae / Q000166:cytology / Q000502:physiology; D058433:Photobioreactors; D017440:Photoperiod; D061005:Ponds
keywords: Computational fluid dynamics (CFD); Light/dark cycle; Microalgal cell; Particle tracking; Raceway pond