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| Effects of Ultra-low Concentration Acid Pretreatment on the Separation of Wheat Straw Components and Cellulose Enzymolysis Efficiency |
| Received:November 13, 2024 Revised:December 17, 2024 |
| DOI：10.11981/j.issn.1000-6842.2025.02.01 |
| Key Words:wheat straw;formic acid;pretreatment;enzyme hydrolysis |
| Fund Project:国家重点研发课题（2021YFC2101601）；国家自然科学基金国际合作项目（22361132543）。 |
| Author Name | Affiliation | Postcode | | LIU Xueqin* | School of Light Industry and Engineering， State Key Lab of Advanced Papermaking and Paper-based Materials， South China University of Technology， Guangzhou， Guangdong Province， 510640 | 510640 | | LYU Yingren | School of Light Industry and Engineering， State Key Lab of Advanced Papermaking and Paper-based Materials， South China University of Technology， Guangzhou， Guangdong Province， 510640 | 510640 | | ZHU Ruonan | School of Light Industry and Engineering， State Key Lab of Advanced Papermaking and Paper-based Materials， South China University of Technology， Guangzhou， Guangdong Province， 510640 | 510640 | | LIU Xiaohong | School of Light Industry and Engineering， State Key Lab of Advanced Papermaking and Paper-based Materials， South China University of Technology， Guangzhou， Guangdong Province， 510640 | 510640 | | WANG Xingjie | School of Light Industry and Engineering， State Key Lab of Advanced Papermaking and Paper-based Materials， South China University of Technology， Guangzhou， Guangdong Province， 510640 | 510640 | | REN Junli* | School of Light Industry and Engineering， State Key Lab of Advanced Papermaking and Paper-based Materials， South China University of Technology， Guangzhou， Guangdong Province， 510640 | 510640 |
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| Abstract: |
| In this study， the effects of ultra-low concentration acid types and pretreatment conditions on the fractionation of wheat straw and enzymolysis were investigated. The results showed that formic acid pretreatment was the most effective. Under the pretreatment conditions of formic acid mass concentration of 1 g/L， the solid-liquid ratio of 1∶20， pretreatment temperature of 170 ℃， and time of 30 min， the 95.55% cellulose retention rate was achieved. The removal rate of hemicellulose and lignin were 81.66% and 38.42%， respectively， the total yield of xylose and xylo-oligosaccharide in the hydrolysate was 80.05%. In addition， the pretreatment residue obtained under this condition showed a glucose conversion of 83.37% after 72 h of enzymatic hydrolysis reaction. After two-step hydrolysis， the glucose and xylose yields was obtained to 95.32%. |
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