Journal
BIORESOURCE TECHNOLOGY
Volume 211, Issue -, Pages 519-526Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.03.145
Keywords
Microalgae; Flat-panel photo-bioreactor; Flash light; Flow field
Funding
- National Natural Science Foundation - China [51176163, 51476141]
- Zhejiang Provincial Natural Science Foundation - China [LR14E060002]
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Novel horizontal tubes and triangular prism (HTTP) baffles that generate flow vortices were developed to increase solution velocity between dark and light areas and thus improve microalgal growth in a flat-panel photo-bioreactor. Solution velocity, mass-transfer coefficient, and mixing time were measured with a particle-imaging velocimeter, dissolved oxygen probes, and pH probes. The solution mass-transfer coefficient increased by 30% and mixing time decreased by 21% when the HTTP baffles were used. The solution velocity between dark and light areas increased from similar to 0.9 cm/s to similar to 3.5 cm/s, resulting in a decreased dark-light cycle period to one-fourth. This enhanced flashing light effect with the HTTP baffles dramatically increased microalgae biomass yield by 70% in the flat-panel photo-bioreactor. (C) 2016 Elsevier Ltd. All rights reserved.
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