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Syngas fermentation by Clostridium carboxidivorans P7 in a horizontal rotating packed bed biofilm reactor with enhanced ethanol production

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  • Shen, Yanwen
  • Brown, Robert C.
  • Wen, Zhiyou

Abstract

Gasification of lignocellulosic biomass followed by syngas fermentation is a promising process for producing fuels and chemicals. Syngas fermentation, however, is commonly limited by low mass transfer rates. In this work, a horizontally oriented rotating packed bed (h-RPB) reactor was developed to improve mass transfer and enhance ethanol production. In the h-RPB reactor, cell attachment materials were packed in the reactor and half submerged in the liquid and half exposed to the headspace. With continuous rotation of the packing materials, the cells in biofilm were alternately in contact with liquid and headspace; thus, transport of syngas to the cells occurred in both the liquid phase and headspace. The volumetric mass transfer coefficient (kLa) of the h-RPB reactor was lower than that in a traditional continuous stirred tank reactor (CSTR), indicating the mass transfer in the liquid phase of h-PRB was lower than CSTR, and the mass transfer in the headspace phase played an important role in syngas fermentation. The syngas fermentation of Clostridium carboxidivorans P7 in h-RPB resulted in a 7.0g/L titer and 6.7g/L/day productivity of ethanol, respectively, 3.3 times higher than those obtained in a CSTR under the same operational conditions. The results demonstrate that the h-RPB reactor is an efficient system for syngas fermentation, making cellulosic ethanol biorefinery one step closer to technical and economic feasibility.

Suggested Citation

  • Shen, Yanwen & Brown, Robert C. & Wen, Zhiyou, 2017. "Syngas fermentation by Clostridium carboxidivorans P7 in a horizontal rotating packed bed biofilm reactor with enhanced ethanol production," Applied Energy, Elsevier, vol. 187(C), pages 585-594.
  • Handle: RePEc:eee:appene:v:187:y:2017:i:c:p:585-594
    DOI: 10.1016/j.apenergy.2016.11.084
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    References listed on IDEAS

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    1. Shen, Yanwen & Brown, Robert & Wen, Zhiyou, 2014. "Enhancing mass transfer and ethanol production in syngas fermentation of Clostridium carboxidivorans P7 through a monolithic biofilm reactor," Applied Energy, Elsevier, vol. 136(C), pages 68-76.
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    1. Monir, Minhaj Uddin & Aziz, Azrina Abd & Khatun, Fatema & Yousuf, Abu, 2020. "Bioethanol production through syngas fermentation in a tar free bioreactor using Clostridium butyricum," Renewable Energy, Elsevier, vol. 157(C), pages 1116-1123.
    2. Marta Pacheco & Patrícia Moura & Carla Silva, 2023. "A Systematic Review of Syngas Bioconversion to Value-Added Products from 2012 to 2022," Energies, MDPI, vol. 16(7), pages 1-24, April.
    3. Khanongnuch, Ramita & Abubackar, Haris Nalakath & Keskin, Tugba & Gungormusler, Mine & Duman, Gozde & Aggarwal, Ayushi & Behera, Shishir Kumar & Li, Lu & Bayar, Büşra & Rene, Eldon R., 2022. "Bioprocesses for resource recovery from waste gases: Current trends and industrial applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 156(C).
    4. Sun, Xiao & Atiyeh, Hasan K. & Zhang, Hailin & Tanner, Ralph S. & Huhnke, Raymond L., 2019. "Enhanced ethanol production from syngas by Clostridium ragsdalei in continuous stirred tank reactor using medium with poultry litter biochar," Applied Energy, Elsevier, vol. 236(C), pages 1269-1279.
    5. Yang, Fan & Zhong, Jie & Liu, Xiaohui & Zhu, Xuedong, 2018. "A novel catalytic alkylation process of syngas with benzene over the cerium modified platinum supported on HZSM-5 zeolite," Applied Energy, Elsevier, vol. 226(C), pages 22-30.
    6. Li, Yuping & Tan, Fenghua & Peng, Jiangang & Feng, Mi & Liao, Yuhe & Luo, Weimin & Dong, Kaijun & Long, Jinxing, 2023. "Exergy analysis of alternative configurations of biomass gasification-mixed alcohol production system via catalytic synthesis and fermentation," Energy, Elsevier, vol. 280(C).
    7. Gunes, Burcu, 2021. "A critical review on biofilm-based reactor systems for enhanced syngas fermentation processes," Renewable and Sustainable Energy Reviews, Elsevier, vol. 143(C).
    8. Azize Ayol & Luciana Peixoto & Tugba Keskin & Haris Nalakath Abubackar, 2021. "Reactor Designs and Configurations for Biological and Bioelectrochemical C1 Gas Conversion: A Review," IJERPH, MDPI, vol. 18(21), pages 1-36, November.

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