| Structural Characteristics of Cellulose and Xylan during in vitro Fermentation by Pig Fecal Bacteria |
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| Author Name | Affiliation | | Ling Meng1 | 1.Guangzhou Haisum Energy Technology Co., Ltd, Guangzhou, Guangdong Province, 511400, China | | ShiLin Cao2 | 2.College of Materials Engineering, Fujian Agricultural and Forestry University, Fuzhou, Fujian Province, 350002, China | | XiaoJuan Ma2 | 2.College of Materials Engineering, Fujian Agricultural and Forestry University, Fuzhou, Fujian Province, 350002, China | | LiHui Chen2 | 2.College of Materials Engineering, Fujian Agricultural and Forestry University, Fuzhou, Fujian Province, 350002, China | | LiuLian Huang2 | 2.College of Materials Engineering, Fujian Agricultural and Forestry University, Fuzhou, Fujian Province, 350002, China | | Fang Huang2,* | 2.College of Materials Engineering, Fujian Agricultural and Forestry University, Fuzhou, Fujian Province, 350002, China |
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| Fund Project:The authors would like to gratefully acknowledge the financial support provided by the National Natural Science Foundation of China (No. 31270638). |
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| Abstract:In this study, cellulose and xylan were in vitro fermented by pig fecal bacteria. Rapid fermentation (40 h) and extended fermentation (eight weeks) were performed. The properties and ultra-structure changes of post-fermented solid residues were studied. In the end effluent, acetic acid, propionic acid, and butyric acid were observed to be the principal short-chain fatty acids (SCFAs) produced by anaerobic fermentation. Xylan was more accessible to bacteria than cellulose, leading to higher SCFA and lactic acid production. In addition, the crystalline structure of cellulose changed, leading to 16.3% and 42.1% increases in crystallinity index for rapid and extended fermentation, respectively. Through this research, a systematic and advanced method to study the degradation chemistry of cellulose and xylan during fermentation was deve-loped. |
| keywords:cellulose xylan pig fecal bacteria in vitro fermentation |
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