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Generating cycle flow between dark and light zones with double paddlewheels to improve microalgal growth in a flat plate photo-bioreactor.
- Source :
-
Bioresource technology [Bioresour Technol] 2018 Aug; Vol. 261, pp. 151-157. Date of Electronic Publication: 2018 Apr 09. - Publication Year :
- 2018
-
Abstract
- Double paddlewheels were proposed to generate cycle flow for increasing horizontal fluid velocity between dark and light zones in a flat plate photo-bioreactor, which strengthened the mass transfer and the mixing effect to improve microalgal growth with 15% CO <subscript>2</subscript> . Numerical fluid dynamics were used to simulate the cycle flow field with double paddlewheels. The local flow field measured with particle image velocimetry fitted well with the numerical simulation results. The horizontal fluid velocity in the photo-bioreactor was markedly increased from 5.8 × 10 <superscript>-5</superscript> m/s to 0.45 m/s with the rotation of double paddlewheels, resulting in a decreased dark/light cycle period. Therefore, bubble formation time and diameter reduced by 24.4% and 27.4%, respectively. Meanwhile, solution mixing time reduced by 31.3% and mass transfer coefficient increased by 41.2%. The biomass yield of microalgae Nannochloropsis Oceanic increased by 127.1% with double paddlewheels under 15% CO <subscript>2</subscript> condition.<br /> (Copyright © 2018 Elsevier Ltd. All rights reserved.)
- Subjects :
- Biomass
Light
Rheology
Stramenopiles
Bioreactors
Microalgae
Subjects
Details
- Language :
- English
- ISSN :
- 1873-2976
- Volume :
- 261
- Database :
- MEDLINE
- Journal :
- Bioresource technology
- Publication Type :
- Academic Journal
- Accession number :
- 29656228
- Full Text :
- https://doi.org/10.1016/j.biortech.2018.04.022