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Alternatively permutated conic baffles generate vortex flow field to improve microalgal productivity in a raceway pond.
- Source :
-
Bioresource technology [Bioresour Technol] 2018 Feb; Vol. 249, pp. 212-218. Date of Electronic Publication: 2017 Oct 10. - Publication Year :
- 2018
-
Abstract
- Alternatively permutated conic (APC) baffles were proposed to generate vertical and horizontal vortex flow to intensify mixing and mass transfer in a raceway pond. Both clockwise vortexes were generated before and after conic baffles in the main stream to increase perpendicular velocity by 40.3% and vorticity magnitude by 1.7 times on vertical cross section. Self-rotary flow around conic baffles and vortex flow among conic baffles were generated to increase perpendicular velocity by 80.4% and vorticity magnitude by 4.2 times on horizontal cross section. The bubble generation time and diameter decreased by 25.5% and 38.7%, respectively, while bubble residence time increased by 84.3%. The solution mixing time decreased by 48.1% and mass transfer coefficient increased by 34.0% with optimized relative spacing (ε) and height (ω) of conic baffles. The biomass productivity of Spirulina increased by 39.6% under pure CO <subscript>2</subscript> with APC baffles in a raceway pond.<br /> (Copyright © 2017 Elsevier Ltd. All rights reserved.)
- Subjects :
- Biomass
Ponds
Microalgae
Photobioreactors
Subjects
Details
- Language :
- English
- ISSN :
- 1873-2976
- Volume :
- 249
- Database :
- MEDLINE
- Journal :
- Bioresource technology
- Publication Type :
- Academic Journal
- Accession number :
- 29045924
- Full Text :
- https://doi.org/10.1016/j.biortech.2017.10.031