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| Study on Weakly Alkaline Sulfite Pretreatment of Bagasse |
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| DOI： |
| Key Words:bagasse； weakly alkaline sulfite pretreatment； XRD； FT-IR； SEM |
| Fund Project:广州市科技计划项目（No.2010Y1-C071）、 广东省产学研重大专项资助项目（2011A090200006）及国家自然科学基金项目（No.21176095）。 |
| Author Name | Affiliation | | 晏群山1 | 1.华南理工大学制浆造纸工程国家重点实验室，广东广州，510640 | | 武书彬1,* | 1.华南理工大学制浆造纸工程国家重点实验室，广东广州，510640 | | 刘立国2 | 2.广州优锐生物科技有限公司，广东广州，510663 | | 杨 尉2 | 2.广州优锐生物科技有限公司，广东广州，510663 |
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| Abstract: |
| The condition of weakly alkaline sulfite pretreatment of bagasse was optimized by orthogonal test and single factor test. The optimum condition was as follow： NaOH 1.5%， Na2SO3 10%， the maximum temperature 160℃ and the time of keeping at maximum temperature 1 h. Under this condition， the conversion rate of reducing sugar (on the bagasse material) reached 61.1% after enzyme hydrolysis. The original and pretreated bagasse， and the sample after enzyme hydrolysis were characterized by XRD， FT-IR and SEM. The results indicated that the crystallinity of cellulose of bagasse increased from 57.1% to 63.3% after the pretreatment， and decreased from 63.3% to 55.6% after enzyme hydrolysis， and the crystallite size also increased after the pretreatment and enzymolysis. The characteristic peak of sulfonic group of 1037 cm-1 indicated part of lignin was sulfonated by the pretreatment. After the pretreatment the surface of cellulose became microporous， and many fines were exposed， and the specific surface area of cellulose appeared lager， after enzyme hydrolysis the structure of fiber was destroyed and there were many pieces of lignin remained. |
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