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Immobilization of Kluyveromyces marxianus K21 via coaxial electrospinning of PVA and sugarcane bagasse composite for bioethanol production

Author

Listed:
  • Chen, Hung-Yueh
  • Khumsupan, Darin
  • Patel, Anil Kumar
  • Kee, Phei Er
  • Ng, Hui-Suan
  • Hsu, Hsien-Yi
  • Lin, Shin-Ping
  • Cheng, Kuan-Chen

Abstract

The study employed coaxial electrospinning technology to design an immobilization system for ethanol production from a sugarcane bagasse (SCB) and polyvinyl alcohol (PVA) composite. Using response surface methodology (RSM), the most suitable pretreatment conditions were 1.84 N H2SO4 at 70.85 °C for 30 min which resulted in 4.73 mg polysaccharide per 1 mL of SCB being extracted, comparing to the theoretical value of 4.51 mg. According to physical characterization analyses, both PVA/SCB and yeast-embedded PVA/SCB composites had superior strength and ductility compared to PVA-only sample. With 36.5 g/L of sugar consumption, a total of 18.01 g/L ethanol was produced after 10 h of cultivation from PVA/SCB/K21 which was higher than that from the freely suspended culture (15.31 g/L at 12 h), resulting in a 15% increase in yield. Furthermore, the PVA/SCB/K21 system was able to maintain constant ethanol production even after 21 days of storage, and could be reused in fermentation for at least 8 cycles. The findings showed that the PVA/SCB/K21 nanothreads is an ideal system for repeated bioethanol production while upcycling sugarcane bagasse biomass waste.

Suggested Citation

  • Chen, Hung-Yueh & Khumsupan, Darin & Patel, Anil Kumar & Kee, Phei Er & Ng, Hui-Suan & Hsu, Hsien-Yi & Lin, Shin-Ping & Cheng, Kuan-Chen, 2024. "Immobilization of Kluyveromyces marxianus K21 via coaxial electrospinning of PVA and sugarcane bagasse composite for bioethanol production," Applied Energy, Elsevier, vol. 356(C).
    • Handle: RePEc:eee:appene:v:356:y:2024:i:c:s0306261923017695
    DOI: 10.1016/j.apenergy.2023.122405
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    Keywords

    Kluyveromyces marxianus K21; Bioethanol; Sugarcane bagasse; Coaxial electrospinning; Microbial immobilization;
    All these keywords.

    JEL classification:

    • K21 - Law and Economics - - Regulation and Business Law - - - Antitrust Law

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