Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7069956 | Bioresource Technology | 2016 | 24 Pages |
Abstract
In this study, computational fluid dynamics (CFD) was used to systemically analyze the movement of algae in a vortex flow field produced by up-down chute baffles. The average cell light/dark (L/D) cycle period, vertical fluid velocity, fraction of time the algae was resides in light zone and the L/D cycle period were investigated under different paddlewheel speeds and microalgal concentrations. Results showed that the L/D cycle period decreased but the vertical fluid velocity increased when the up-down chute baffles were used. The L/D cycle period decreased by 24% (from 5.1Â s to 3.9Â s), and vertical fluid velocity increased by 75% when up-down chute baffles were used with paddlewheel speed of 30Â r/min. The probability of L/D cycle period of 3Â s increased by 52% from 0.29 to 0.44 with the up-down chute baffles. This led to approximately 22% increase in biomass yield without changing the paddlewheel speed.
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Authors
Zongbo Yang, Jun Cheng, Qing Ye, Jianzhong Liu, Junhu Zhou, Kefa Cen,