Two-scale model for quantifying the effects of laminar and turbulent mixing on algal growth in loop photobioreactors

Shariff, Shoaib; Chakraborty, Saikat

doi:10.1016/j.apenergy.2015.12.033

Cited by 8 publications

(2 citation statements)

References 18 publications

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“…In the cultivation bottle, Reynolds number was found as 3,180, so the flow was observed in transition regime. As reported by Shariff and Chakraborty, 46 when the flow regime is laminar, the mixing time is high, and it causes incomplete mixing characteristics, heterogeneous culture medium, and formation of cell clusters. Laminar flow regime can cause a non‐effective mixing, so the cells cannot be exposed the same conditions in terms of nutrients, lightning, and gas exchange.…”

Section: Resultsmentioning

confidence: 87%

Evaluation of scale‐up methodologies and computational fluid dynamics simulation for fucoxanthin production in airlift photobioareactor

Guler

Deniz

Demirel

et al. 2020

Asia-Pacific J Chem Eng

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Researches about commercial-scale production of fucoxanthin are increasing day by day due to the much interest of its broad beneficial health effects. The aim of this study was to investigate the scale-up methodologies in airlift photobioreactor and to simulate fluid flow using computational fluid dynamics (CFD) for fucoxanthin production from Phaeodactylum tricornutum microalgae. During the transition process from 1-L cultivation bottle to the 2-L airlift photobioreactor, the constant mixing time, the constant volumetric oxygen transfer coefficient, and the constant volumetric power consumption rate were evaluated as scale-up methodologies under laboratory conditions. Maximum fucoxanthin yield was found as 1.01 ± 0.07 mg g −1 using scale-up strategy based on constant volumetric power consumption rate. After that, CFD simulation was performed in order to examine flow characteristics, mixing efficiency, hydrodynamics, and gas holdup for selected operation conditions. It was observed that mixing efficiency was low because the draft tube configuration prevented the circulation of fluid and caused a heterogenic culture medium inside the reactor. It is possible to overcome this bottleneck by developing the effective draft tube.

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Section: Resultsmentioning

confidence: 87%

Evaluation of scale‐up methodologies and computational fluid dynamics simulation for fucoxanthin production in airlift photobioareactor

Guler

Deniz

Demirel

et al. 2020

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

show abstract

“…Major engineering advantages and challenges for both processes are discussed in the paper. Shariff and Chakraborty [16] quantified the mixing effects on algal growth in loop photobioreactors using two-scale low-dimensional models derived through spatial averaging of the Convection-Diffusion-Reaction equation. The paper presented simulation results of the temporal dynamics of the algae (Chlorella vulgaris), carbon dioxide and oxygen along the reactor in laminar and turbulent mixing regimes.…”

Section: Renewable Energymentioning

confidence: 99%