Issue |
E3S Web Conf.
Volume 602, 2025
International Conference on Materials and Energy (ICOME2024)
|
|
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Article Number | 02007 | |
Number of page(s) | 6 | |
Section | Materials | |
DOI | https://doi.org/10.1051/e3sconf/202560202007 | |
Published online | 14 January 2025 |
Enrichment of Second Generation Ethanol Concentration Obtained from Napier Grass Pretreated with Sulfuric Acid and Hydrothermal Pretreatment
1 Department of Biotechnology, Faculty of Applied Science, King Mongkut’s University of Technology North Bangkok, Bangkok, Thailand
2 Biorefinery and Process Automation Engineering Center, Department of Chemical and Process Engineering, The Sirindhorn International Thai-German Graduate School of Engineering, King Mongkut’s University of Technology North Bangkok, Bangkok, Thailand
3 Faculty of Agricultural, Life and Environmental Sci Ag, Food & Nutri Sci Dept, University of Alberta, Edmonton, Canada
4 Theophane Venard School Of Biotechnology, Assumption University of Thailand
5 Department of Microbiology, Faculty of Science, Srinakharinwirot University, Bangkok, Thailand
* Corresponding author: prapakorn@g.swu.ac.th
Enhancing sugar concentration is crucial for improving ethanol yield in biorefinery processes, enabling more efficient downstream recovery. This study investigates the hydrothermal pretreatment of Napier grass with 2% sulfuric acid to boost sugar recovery and ethanol production by incorporating a concentration step. After pretreatment, the liquid fractions were concentrated two-fold and four-fold through rotary evaporation and freeze-drying, resulting in a significant increase in sugar levels, with a 3.5-fold rise in sugar concentration achieved through rotary evaporation compared to unconcentrated samples. However, ethanol production was limited by elevated levels of inhibitors, such as acetic acid and furfural. The maximum ethanol concentration reached was 2.43%, from a liquid fraction concentrated four-fold. These results highlight the necessity of concentration techniques to improve sugar recovery, while also emphasizing the importance of removing inhibitors to increase ethanol yields and enhance the overall efficiency of biorefining processes.
Key words: Biofuel / Biorefinery / Circular economy / Lignocellulose biomass / Pretreatment
© The Authors, published by EDP Sciences, 2025
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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