摘要
对玉米秸秆蒸汽爆破处理后制取沼气和燃料乙醇进行了试验.结果表明,玉米秸秆蒸汽爆破处理可显著提高沼气和乙醇产量,汽爆玉米秸秆常温和中温厌氧发酵条件下的最大产气量分别比对照提高了1.67倍和1.63倍,蒸汽爆破玉米秸秆的最大乙醇得率比对照提高了4.47倍.在对蒸汽爆破玉米秸秆厌氧发酵和乙醇发酵过程中的能量转换效率进行对比分析中发现,蒸汽爆破玉米秸秆厌氧发酵过程中的转化率最大仅为2013.29kJ·kg-1(常温)和3151.15kJ·kg-1(中温),远低于蒸汽爆破秸秆乙醇发酵过程中4225.88kJ·kg-1的最大能量转化率,这与乙醇发酵中添加了纤维素酶和木聚糖酶可以促进纤维素和中间产物转化有关.
Comparative analysis between anaerobic fermentation and ethanol fermentation with steam exploded corn stalk was conducted in the paper. The results showed that steam explosion treatment can significantly increase the yield of biogas and ethanol production ratio of corn straw, the maximum bio- gas yield of normal and mesophilic fermentation of steam exploded corn straw is 1.67 times and 1.63 times higher than that of the controlled test respectively, and the largest ethanol conversion rate is 4.47 times higher than that of the controlled test. The analysis of energy conversion rate of anaerobic fermen- tation and ethanol fermentation with steam exploded corn straw showed that the maximum energy con- version efficiency of anaerobic fermentation process was only 2 013.29 kJ ·kg^-1 （ normal temperature） and 3 151.15 kJ·kg^-1（mesophilic temperature）, respectively which was far lower than the maximum energy conversion of ethanol fermentation process 4 225.88 kJ·kg^-1, this is due to the adding of cel- lulase and xylanase which can promote the cellulose and intermediate transformation in the ethanol fer- mentation process.
出处
《河南农业大学学报》
CAS
CSCD
北大核心
2013年第4期425-429,共5页
Journal of Henan Agricultural University
基金
河南省教育厅科学技术研究重点项目(12B210009)
关键词
玉米秸秆
蒸汽爆破
厌氧发酵
乙醇发酵
能量转换效率
corn stalk
steam explosion
anaerobic fermentation
ethanol fermentation
energy conver-sion efficiency
