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Three-dimensional numerical simulation of light penetration in an optimized flow field composed of microalgae cells, carbon dioxide bubbles and culture medium.
- Source :
-
Bioresource technology [Bioresour Technol] 2019 Nov; Vol. 292, pp. 121979. Date of Electronic Publication: 2019 Aug 09. - Publication Year :
- 2019
-
Abstract
- In order to evaluate light penetration and its influence on microalgae growth in a raceway pond with alternatively permutated conic baffles (RWP-APCB), 3D numerical simulation of light penetration was performed using computational fluid dynamics in an optimized flow field composed of microalgae cells, CO <subscript>2</subscript> bubbles and culture medium. Results showed that light intensity in the culture medium attenuated faster in accordance with solution depth, with increased microalgae cell concentration, increased bubble volume fraction and decreased CO <subscript>2</subscript> bubble diameter. Light zone fraction (i.e. ratio of light zone length to solution depth) increased with promoted incident irradiation. It was found that around 75% of microalgae cells were distributed in light zone and non-photochemical quenching coefficient of microalgae decreased by 32% in RWP-APCB. This resulted in a 16% increase of the Chlorella pyrenoidosa biomass growth rate, to 0.36 g/L/d.<br /> (Copyright © 2019 Elsevier Ltd. All rights reserved.)
- Subjects :
- Biomass
Carbon Dioxide
Ponds
Chlorella
Microalgae
Subjects
Details
- Language :
- English
- ISSN :
- 1873-2976
- Volume :
- 292
- Database :
- MEDLINE
- Journal :
- Bioresource technology
- Publication Type :
- Academic Journal
- Accession number :
- 31445241
- Full Text :
- https://doi.org/10.1016/j.biortech.2019.121979