Enhanced enzymolysis and bioethanol yield from tobacco stem waste based on mild synergistic pretreatment

Gong, Jiang-Shi-Qi and Su, Jia-En and Cai, Jie-Yun and Zou, Ling and Chen, Yi and Jiang, Yong-Lei and Hu, Bin-Bin (2023) Enhanced enzymolysis and bioethanol yield from tobacco stem waste based on mild synergistic pretreatment. Frontiers in Energy Research, 10. ISSN 2296-598X

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Abstract

The use of mild pretreatment conditions can significantly lower the cost of the biorefining process. This study evaluated a mild pretreatment approach for tobacco stem waste using a combination of dilute acid and dilute alkali. By optimizing the pretreatment conditions, we obtained a high reducing sugar concentration at a pretreatment temperature <100°C. Increasing the acid or alkali strength in a single pretreatment step did not always improve the result; instead, the synergistic effect of both pretreatment components was important. To increase the bioethanol titer, a high solid loading, 30%, was used for bioethanol fermentation. Compared with batch fermentation, enzyme feeding with a shorter feeding period (24 h) enhanced the bioethanol production by 4.32%, generating 86.88 g/L bioethanol. The results provide valuable insights into the effects of two-step acid/alkali pretreatment on enzymolysis. The findings suggest that the optimized synergistic pretreatment process is efficient for bioethanol fermentation.

Item Type: Article
Subjects: Souths Book > Energy
Depositing User: Unnamed user with email support@southsbook.com
Date Deposited: 29 Apr 2023 07:18
Last Modified: 23 May 2024 07:46
URI: http://research.europeanlibrarypress.com/id/eprint/749

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