Journal
BIOTECHNOLOGY AND BIOENGINEERING
Volume 117, Issue 4, Pages 959-969Publisher
WILEY
DOI: 10.1002/bit.27268
Keywords
dark; light cycles; flat-panel photobioreactor; fluid mechanics; Mixing energy; open-channel raceways
Categories
Funding
- Sandia National Laboratories
- National Science Foundation [1332404]
- Emerging Frontiers & Multidisciplinary Activities
- Directorate For Engineering [1332404] Funding Source: National Science Foundation
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Turbulent mixing in pilot-scale cultivation systems influences the productivity of photoautotrophic cultures. We studied turbulent mixing by applying particle image velocimetry and acoustic doppler velocimetry to pilot-scale, flat-panel photobioreactor, and open-channel raceway. Mixing energy inputs were varied from 0.1 to 2.1 W center dot m(-3). The experimental results were used to quantify turbulence and to validate computational fluid dynamics models, from which Lagrangian representations of the fluid motion in these reactors were derived. The results of this investigation demonstrated that differences in mixing energy input do not significantly impact the structure of turbulence and the light/dark cycling frequencies experienced by photoautotrophic cells within the reactors. The experimental and computational results of our research demonstrated that well-mixed conditions exist in pilot-scale, flat-panel photobioreactors and open-channel raceways, even for relatively low mixing energy inputs.
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