CFD simulation study of internal mixing and flow of a modified airlift bioreactor
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Zeng Lingwei
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Li Zhenpeng
Abstract
When the airlift bioreactor is applied to the field of industrial fermentation, there is a common problem of low mixing and flow efficiency due to its simple structure. In order to expand the application of airlift bioreactor in the field of industrial fermentation, a new type of airlift bioreactor with three-dimensional bumps in the draft tube has been designed to enhance the mixing and flow of gas-liquid two-phase in the reactor. In order to determine the specific influence of the three-dimensional bumps on the internal flow field of the reactor, and to provide technical reference for the improvement of the structure of the airlift bioreactor, in this paper, the CFD simulation of this type of bioreactor is carried out. Based on the Euler multiphase flow, the Realizable k-ε model was used to analyze the flow field of the reactor with average gas-liquid flow linear velocity and temperature as parameters. The results show that under certain conditions, the three-dimensional bumps inside the draft tube can effectively accelerate the gas-liquid two-phase flow and better promotes the mixing of pig manure fermentation broth and air.
Funding source: Guangxi Key Laboratory of Petrochemical Resources Processing and Process Intensification Technology
Award Identifier / Grant number: 2021Z004
Acknowledgments
This study is partially supported by the Director Fund of Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University (grant number: 2021Z004). We would like to express our gratitude for their financial support, which has made this study possible.
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Research ethics: Not applicable.
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Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Competing interests: The authors state no conflict of interest.
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Research funding: Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, grant number: 2021Z004.
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Data availability: The raw data can be obtained on request from the corresponding author.
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Artikel in diesem Heft
- Frontmatter
- Articles
- Study on mixing characteristics of viscoplastic fluid in a rigid-flexible impeller stirred tank
- Emission and performance investigation of mango seed oil biodiesel supplied with n-pentanol and n-hexanol additives and optimization of fuel blends using modified deep neural network
- Study of chlorophyll dye from peppermint (mentha spicata) used as a sensitizer in TiO2 solar cells
- Dry reforming of methane over Ni–Mg–Al and Ni–Ca–Al type hydrotalcite-like catalysts: effects of synthesis route and Ru incorporation
- CFD-DEM simulation of chemical looping hydrogen generation in a moving bed reactor
- Conceptual design of a fixed bed N2O decomposition reactor with a heat pipe heat exchanger
- Investigation of polymers pyrolysis in a solid-gas conical spouted bed: CFD simulation
- CFD simulation study of internal mixing and flow of a modified airlift bioreactor
- Mechanism analysis and mixing characterization of variable-speed mechanical mixing enhancement
- Enhanced sonocatalytic degradation of Acid Red 27 with Fe2O3 catalyst: a kinetic study
