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当前位置: 首页 > 文章 > 稀酸稀碱预处理的稻秸两步厌氧发酵性能分析 农业机械学报 2015,46 (2) 168-175+180
Position: Home > Articles > Property Analysis of Two-step Anaerobic Digestion of Rice Straw Pretreated by Dilute Acid and Dilute Alkali Transactions of the Chinese Society for Agricultural Machinery 2015,46 (2) 168-175+180

稀酸稀碱预处理的稻秸两步厌氧发酵性能分析

作  者：
王殿龙;艾平;鄢烈亮;郁亮;晏水平;张衍林
单  位：
华盛顿州立大学生物系统工程学院;荆门市农村能源技术推广站;华中农业大学工学院
关键词：
稻秸;两步发酵;水解液;木质纤维素;甲烷
摘  要：
基于两步厌氧发酵工艺,对比稀酸、稀碱预处理条件下的稻秸降解规律和水解液产甲烷潜力。HCl质量分数为0.5%~2.5%范围内(60℃),1.0%和1.5%的水解液COD值最高,HCl水解时稻秸半纤维素下降幅度大,水解液中葡萄糖质量浓度较低。Na OH质量分数为0.5%~4.0%范围内(60℃),0.5%和1.0%的水解能力弱,2.0%和3.0%时水解效率高,当Na OH质量分数高于2.0%时,纤维素、半纤维素和木质素均下降,木质素降解率最高。酸、碱实验组固液比为7.5%时均有良好的水解效率。以HCl和Na OH水解液序批式产甲烷,5个进料周期中HCl水解液COD的平均单位质量产气率为631~906 m L/g,Na OH实验组为340~373 m L/g,单位质量产气率受进料浓度差异的影响较小,主要受酸、碱等不同水解方法的影响,酸、碱实验组发酵类型不同,酸实验组的产酸过程更充分。
译  名：
Property Analysis of Two-step Anaerobic Digestion of Rice Straw Pretreated by Dilute Acid and Dilute Alkali
作  者：
Wang Dianlong;Ai Ping;Yan Lieliang;Yu Liang;Yan Shuiping;Zhang Yanlin;College of Engineering,Huazhong Agricultural University;Jingmen Rural Energy Technical Extending Station;Department of Biological System Engineering,Washington State University;
关键词：
Straw Two-step fermentation Hydrolyzate Lignocelluloses Methane
摘  要：
Based on two-step anaerobic fermentation process,this study compares the degradation feature of rice straw and the methane production potential of hydrolyzate under the conditions of dilute acid and dilute alkali pretreatment. In the HCl mass fraction range of 0. 5% ~ 2. 5%( 60℃),the hydrolyzates in the tests of 1. 0% and 1. 5% obtained higher COD mass concentration. During dilute acid hydrolysis,the hemicellulose fraction decreased significantly,and the glucose concentration was low. In the Na OH mass fraction of 0. 5% ~ 4. 0%,the hydrolysis of rice straw was weak in the tests of 0. 5% and 1. 0%,while the hydrolysis efficiency in the tests of 2. 0% and 3. 0% was high. When the mass fraction of Na OH was higher than 2. 0%,cellulose,hemicellulose and lignin all decreased,and degradation rate of lignin was the highest. The tests of acid and alkali could achieve good hydrolysis efficiency at weight-in-volume ratio of 7. 5%. Used the hydrolyzate from acid and alkali pretreatment for acid and alkali pretreatment for methane production,the average gas production of unit COD mass were 631 ~ 906 m L / g from HCl hydrolyzate tests and 340 ~ 373 m L / g from Na OH hydrolyzate tests in five feeding periods. The biogas production rate of unit mass was less affected by concentration of feeding,and mainly affected by different methods of hydrolysis of acid and alkali. The types of anaerobic fermentation were different in the acid and alkali tests,and the process of generating volatile acid was more sufficient in the tests of acid hydrolyzates.

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