Cited by 45Algal biology and biofuel productionFluid Dynamics and MixingAquatic Ecosystems and Phytoplankton Dynamics

Decrease in light/dark cycle of microalgal cells with computational fluid dynamics simulation to improve microalgal growth in a raceway pond

Yang, Zongbo, Cheng, Jun, Ye, Qing, Liu, Jianzhong, Zhou, Junhu, Cen, Kefa·2016·Bioresource Technology

Abstract

In this study, computational fluid dynamics (CFD) was used to systemically analyze the movement of algae in a vortex flow field produced by up-down chute baffles. The average cell light/dark (L/D) cycle period, vertical fluid velocity, fraction of time the algae was resides in light zone and the L/D cycle period were investigated under different paddlewheel speeds and microalgal concentrations. Results showed that the L/D cycle period decreased but the vertical fluid velocity increased when the up-down chute baffles were used. The L/D cycle period decreased by 24% (from 5.1s to 3.9s), and vertical fluid velocity increased by 75% when up-down chute baffles were used with paddlewheel speed of 30r/min. The probability of L/D cycle period of 3s increased by 52% from 0.29 to 0.44 with the up-down chute baffles. This led to approximately 22% increase in biomass yield without changing the paddlewheel speed.

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Crossref · 10.1016/j.biortech.2016.08.094

Cites

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  • The purpose of the listed models covers a variety of applications, including mechanistic understanding, investigations on flashing-light effect, design optimization, and optimization of operating conditions.

    “The purpose of the listed models covers a variety of applications, including the mechanistic understanding of photobioreactors [17-21], investigations on the flashing-light effect [22-31], photobioreactor design optimization [21,22,29,32-42] and optimization of operating conditions [26,34-36,43-45].”
  • A number of different turbulence models were employed by researchers: the k-ε model, the RNG k-ε model, the realizable k-ε model, and the k-ω models are the most commonly used ones.

    “According to Table 1, a number of different turbulence models were employed by researcher: the k -# model [32,33,43], the RNG k -# model [22], the realizable k -# model [35], and the k -w models [22,33] are the most commonly used ones.”
  • The rotation of the paddle wheel is considered using the sliding mesh technique, where an interface divides the numerical mesh into two parts: one is static while the other one moves with the rotating part at constant velocity.

    “The rotation of the paddle wheel is considered using the sliding mesh technique [22,32,33,35], where an interface divides the numerical mesh into two parts: one is static while the other one moves with the rotating part at constant velocity.”

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Authors
Yang, Z., Cheng, J., Ye, Q., Liu, J., Zhou, J., & Cen, K.
Affiliations
State Key Laboratory of Clean Energy Utilization (CN)
Corresponding author
Cheng, Jun
Venue
Bioresource Technology
Publisher
Elsevier BV
Published
2016-11
Volume
220
Pages
352-359
ISSN
0960-8524 (ISSN-L)
OpenAlex
W2509669997
Cited by
45
References
30
Citations by year
2026: 2 · 2025: 5 · 2024: 5 · 2023: 4 · 2022: 5 · 2021: 1 · 2020: 8 · 2019: 6 · 2018: 6 · 2017: 3
FWCI
1.36
Type
journal article
Language
en
Open access
closed
Locations
  • Bioresource Technology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Natural Science Foundation (51476141)
  • National key research and development program (2016YFB0601003)
  • Zhejiang Provincial Natural Science Foundation (LR14E060002)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
  • Physical Sciences › Engineering › Biomedical Engineering › Fluid Dynamics and Mixing
  • Physical Sciences › Environmental Science › Environmental Chemistry › Aquatic Ecosystems and Phytoplankton Dynamics
Keywords
microalgae growth, raceway ponds, light-dark cycle, cell residence time, vortex flow, biomass yield
MeSH terms
Light, Photoperiod, Biomass, Computational Biology, Hydrodynamics, Microalgae, Ponds

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