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Enhancing microalgal biomass productivity with an optimized flow field generated by double paddlewheels in a flat plate photoreactor with CO 2 aeration based on numerical simulation.
- Source :
-
Bioresource technology [Bioresour Technol] 2020 Oct; Vol. 314, pp. 123762. Date of Electronic Publication: 2020 Jun 30. - Publication Year :
- 2020
-
Abstract
- Computational fluid dynamics were used to analyze the flash light effect and CO <subscript>2</subscript> bubble behavior in an optimized flow field generated by double paddlewheels in a flat plate photoreactor to enhance microalgal biomass productivity. The increased D/w ratio significantly enhanced the average turbulent kinetic energy and flash cycle frequency. However, the effects became weak when the D/w ratio was over 0.67. Appliance of double paddlewheels increased flash cycle frequency from 0.035 to 0.121 Hz and increased light time ratio from 8.3% to 31.5%. Meanwhile, the bubble dynamic behavior was characterized using population balance model. The average bubble size reduced by 24.4% and the bubble rising velocity reduced by 10.6%, which facilitated CO <subscript>2</subscript> mixing and mass transfer in microalgal solution. Therefore, biomass accumulation of microalgae Chlorella in the photoreactor with double paddlewheels increased by 62.3% under 15% CO <subscript>2</subscript> .<br />Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.<br /> (Copyright © 2020 Elsevier Ltd. All rights reserved.)
- Subjects :
- Biomass
Carbon Dioxide
Photobiology
Photobioreactors
Chlorella
Microalgae
Subjects
Details
- Language :
- English
- ISSN :
- 1873-2976
- Volume :
- 314
- Database :
- MEDLINE
- Journal :
- Bioresource technology
- Publication Type :
- Academic Journal
- Accession number :
- 32645573
- Full Text :
- https://doi.org/10.1016/j.biortech.2020.123762