Characteristics of destarched corn fiber extrudates for ethanol production |
| |
Authors: | Lin Myat Gi-Hyung Ryu |
| |
Affiliation: | Department of Food Science and Technology, Kongju National University, Yesan, Choongnam 340-802, Republic of Korea |
| |
Abstract: | The effect of extrusion on characteristics of destarched corn fiber was investigated. Extrusion was conducted at a screw speed of 300 rpm, feed rate of 100 g/min, feed moisture content of 30%, melt temperature of 140 °C and die diameter of 3 mm. After extrusion, characteristics of raw and extruded destarched corn fiber were compared. Raw and extruded destarched corn fibers were enzymatically saccharified and fermented using Saccharomyces cerevisiae (ATCC 24858). Extrusion pretreatment resulted in low crystallinity index, significant decrease in degree of polymerization and microstructure disruption of destarched corn fiber for enzymatic saccharification. This provides a significant increase in xylose yield for fermentation. Significant increase in protein digestibility and free amino nitrogen were additional benefits of extrusion for yeast nutrient in fermentation. Therefore, extruded destarched corn fiber significantly increased (p < 0.05) ethanol yield (29.08 g/L) and higher conversion (88.79%) by improving the physiochemical and functional properties for saccharification and fermentation. |
| |
Keywords: | Thermo-mechanical extrusion Destarched corn fiber Ethanol yield Conversion % |
本文献已被 ScienceDirect 等数据库收录! |
|