SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 55 ›› Issue (3): 123-136.DOI: 10.1016/j.cjche.2022.04.028

• Full Length Article • 上一篇    下一篇

Purification of bioethanol fermentation broth using hydrophilic PVA crosslinked PVDF-GO/TiO2 membrane

Tutuk Djoko Kusworo, Monica Yulfarida, Andri Cahyo Kumoro, Dani Puji Utomo   

  1. Department of Chemical Engineering, Faculty of Engineering, Diponegoro University, Semarang, Indonesia
  • 收稿日期:2022-02-08 修回日期:2022-04-04 出版日期:2023-03-28 发布日期:2023-06-03
  • 通讯作者: Tutuk Djoko Kusworo,E-mail:tdkusworo@che.undip.ac.id
  • 基金资助:
    This research was financialy supported by Directorate of Research and Community Service, Deputy for Strengthening Research and Development, Ministry of Research and Technology/National Research and Innovation Agency of Indonesia (8/E1/KPT/2021) with research agreement contract (225-29/UN7.6.1/PP/2021).

Purification of bioethanol fermentation broth using hydrophilic PVA crosslinked PVDF-GO/TiO2 membrane

Tutuk Djoko Kusworo, Monica Yulfarida, Andri Cahyo Kumoro, Dani Puji Utomo   

  1. Department of Chemical Engineering, Faculty of Engineering, Diponegoro University, Semarang, Indonesia
  • Received:2022-02-08 Revised:2022-04-04 Online:2023-03-28 Published:2023-06-03
  • Contact: Tutuk Djoko Kusworo,E-mail:tdkusworo@che.undip.ac.id
  • Supported by:
    This research was financialy supported by Directorate of Research and Community Service, Deputy for Strengthening Research and Development, Ministry of Research and Technology/National Research and Innovation Agency of Indonesia (8/E1/KPT/2021) with research agreement contract (225-29/UN7.6.1/PP/2021).

摘要: The presence of impurities in the bioethanol fermentation broth should be removed to mitigate any possible ineffective refining processes as well as to enhance bioethanol production. In this study, a pre-filtration process was carried out for separating fermentation yeast cells and residual substrates using a microfiltration membrane. Hydrophilic polyvinylidene fluoride-graphene oxide/titanium dioxide (PVDF-GO/TiO2) membrane with polyvinyl alcohol (PVA) surface-coating modification was fabricated and characterized. Membrane modification attempts have succeeded in increasing the hydrophilicity as indicated by contact angle decline from 72.10° to 34.83° and affinity towards water leading to higher water permeability. The performance evaluation showed that 90.77% of unwanted by-products (yeast cells and residual substrate) can be removed. This high rejection is also followed by a high and stable flux performance at 40.20 L·m-2·h-1 where the flux was increased by 13 times compared to that of the neat membrane. The PVA-coated PVDF-GO/TiO2 showed the best anti-biofouling performance with a flux recovery ratio after 5 days incubation (FRR5d) of 93.55%. This membrane material has excellent prospects in future membrane development for either in-situ application or as a pre-filtration in the fermentation process to separate living cells and residual substrates before being further processed in the refining processes.

关键词: Biofuel, Membranes, Fermentation, Filtration, Separation, Selectivity

Abstract: The presence of impurities in the bioethanol fermentation broth should be removed to mitigate any possible ineffective refining processes as well as to enhance bioethanol production. In this study, a pre-filtration process was carried out for separating fermentation yeast cells and residual substrates using a microfiltration membrane. Hydrophilic polyvinylidene fluoride-graphene oxide/titanium dioxide (PVDF-GO/TiO2) membrane with polyvinyl alcohol (PVA) surface-coating modification was fabricated and characterized. Membrane modification attempts have succeeded in increasing the hydrophilicity as indicated by contact angle decline from 72.10° to 34.83° and affinity towards water leading to higher water permeability. The performance evaluation showed that 90.77% of unwanted by-products (yeast cells and residual substrate) can be removed. This high rejection is also followed by a high and stable flux performance at 40.20 L·m-2·h-1 where the flux was increased by 13 times compared to that of the neat membrane. The PVA-coated PVDF-GO/TiO2 showed the best anti-biofouling performance with a flux recovery ratio after 5 days incubation (FRR5d) of 93.55%. This membrane material has excellent prospects in future membrane development for either in-situ application or as a pre-filtration in the fermentation process to separate living cells and residual substrates before being further processed in the refining processes.

Key words: Biofuel, Membranes, Fermentation, Filtration, Separation, Selectivity