AI Article Synopsis
- Efficient enzymatic hydrolysis is essential for producing high concentrations of monosaccharides and ethanol, but lignin and acetyl groups in poplar hinder this process.
- The study utilized hydrogen peroxide-acetic acid for delignification and sodium hydroxide for deacetylation, successfully removing 81.9% of lignin and all acetyl groups.
- This method led to the highest reported yields of monosaccharides (318.1 g/L) and ethanol (114.9 g/L) from poplar, demonstrating effectiveness at relatively low temperatures.
Article Abstract
Efficient enzymatic hydrolysis is required for the production of high concentration monosaccharides and ethanol. The lignin and acetyl group in poplar can limit the enzymatic hydrolysis. However, the effect of delignification combined with deacetylation on the saccharification of poplar for high concentration monosaccharides was not clear. Herein, hydrogen peroxide-acetic acid (HPAA) was used for delignification and sodium hydroxide was used for deacetylation to enhance the hydrolyzability of poplar. Delignification with 60% HPAA at 80 °C could remove 81.9% lignin. Acetyl group was completely removed with 0.5% NaOH at 60 °C. After the saccharification, 318.1 g/L monosaccharides were obtained with a poplar loading of 35% (w/v). After simultaneous saccharification and fermentation, 114.9 g/L bioethanol was gained from delignified and deacetylated poplar. Those results showed the highest monosaccharides and ethanol concentrations in reported research. This developed strategy with a relatively low temperature could effectively improve the production of high concentration monosaccharide and ethanol from poplar.
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| http://dx.doi.org/10.1016/j.biortech.2023.129459 | DOI Listing |
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