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Enhanced flashing light effect with up-down chute baffles to improve microalgal growth in a raceway pond.
- Source :
-
Bioresource technology [Bioresour Technol] 2015 Aug; Vol. 190, pp. 29-35. Date of Electronic Publication: 2015 Apr 22. - Publication Year :
- 2015
-
Abstract
- Novel up-down chute baffles that sequentially generate clockwise and anticlockwise liquid vortexes were developed to increase vertical liquid velocity between the bottom dark area and the top light area in a raceway pond. The vertical liquid velocity, mixing time, and mass transfer coefficient were measured as functions of paddlewheel speed and air aeration rate by using a particle imaging velocimeter, pH probes, and dissolved oxygen probes. The up-down chute baffles decreased the liquid mixing time and increased the mass transfer coefficient by 41% and 25%, respectively. Besides, the vertical liquid velocity increased from ∼0.5cm/s to ∼6.1cm/s. As a result, the dark-light cycle period was reduced to 1/12. This enhanced flashing light effect with up-down chute baffles increased biomass yield by 32.6% in the same raceway pond.<br /> (Copyright © 2015 Elsevier Ltd. All rights reserved.)
- Subjects :
- Cell Proliferation physiology
Cell Proliferation radiation effects
Computer-Aided Design
Equipment Design
Equipment Failure Analysis
Light
Photosynthesis physiology
Photosynthesis radiation effects
Radiation Dosage
Lighting instrumentation
Microalgae physiology
Microalgae radiation effects
Photic Stimulation instrumentation
Photobioreactors microbiology
Ponds microbiology
Subjects
Details
- Language :
- English
- ISSN :
- 1873-2976
- Volume :
- 190
- Database :
- MEDLINE
- Journal :
- Bioresource technology
- Publication Type :
- Academic Journal
- Accession number :
- 25919934
- Full Text :
- https://doi.org/10.1016/j.biortech.2015.04.050