Ethanol production from the red seaweed Eucheuma denticulatum and recovery of 5-hydroxymethylfurfural
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Title
- Ethanol production from the red seaweed Eucheuma denticulatum and recovery of 5-hydroxymethylfurfural
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Author(s)
- Sunwoo, InYung; Nguyen, Trung Hau; Kim, Sung-Koo; Jeong, Gwi-Taek
- KIOST Author(s)
- null선우인영
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Alternative Author(s)
- 선우인영
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Publication Year
- 2023
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Abstract
- In this study, ethanol was produced via thermal-acid hydrolysis, enzymatic saccharification, and fermentation from the red seaweed Eucheuma denticulatum as a biomass. Also, the removal and further recovery of 5-hydroxymethylfurfural (5-HMF) from hydrolysates were investigated. The thermal-acid hydrolysis produced 38.37 g/L monosaccharides and 6.55 g/L 5-HMF under the optimized condition of 13.7% (w/v) seaweed slurry and 479 mM H2SO4 at 121 °C for 54 min. More monosaccharide (6.43 g/L) was obtained from subsequent enzymatic saccharification using 8 U/mL of commercial enzyme C-Tec2 at 45 °C for 36 h. By detoxification, 88.0% of 5-HMF was removed from seaweed hydrolysates using a 1:1 ratio of polyethylenimine (PEI) to 5-HMF (g/g) at a pH of 11.0 for 15 min. Ethanol fermentation of E. denticulatum hydrolysate was performed using wild-type and galactose-adapted Saccharomyces cerevisiae. The ethanol concentration was maximized to 19.56 g/L (YEtOH = 0.43 g/g) by fermenting detoxified E. denticulatum hydrolysate with galactose-adapted S. cerevisiae Furthermore, for the valuation of 5-HMF (removed from hydrolysate) as a platform chemical, 85.6% of 5-HMF was recovered from the PEI-5-HMF solution by H2SO4 at pH 1.0.
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ISSN
- 2190-6815
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/43990
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DOI
- 10.1007/s13399-023-03933-3
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Bibliographic Citation
- Biomass Conversion and Biorefinery, 2023
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Publisher
- Springer Verlag
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Keywords
- 5-HMF recovery; Bioethanol; Biorefinery; Eucheuma denticulatum; Thermal-acid hydrolysis
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Type
- Article
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Language
- English
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Document Type
- Article; Early Access
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