玉米秸秆厌氧消化水解动力学
收稿日期: 2014-12-12
修回日期: 2015-01-06
网络出版日期: 2015-02-13
基金资助
国家自然科学基金−青年科学基金项目（21106145）；
中国科学院重点部署项目（KGZD-EW-304-1）
Kinetics of Substrate Hydrolysis for Anaerobic Digestion of Corn Stalk
Received date: 2014-12-12
Revised date: 2015-01-06
Online published: 2015-02-13
为解决原料预处理存在的不足，探究新的强化水解工艺，以新鲜和风干的玉米秸秆为原料，采用批式中温（35℃）厌氧发酵实验和有机物水解三种动力学模型研究秸秆厌氧消化水解规律。结果表明，水解动力学模型不能完全反映秸秆整个厌氧消化过程水解规律，秸秆水解速率存在明显的分段差异，新鲜和风干的玉米秸秆水解速率分别在2.75 d和4 d出现“拐点”。通过拟合效果最好的球形颗粒模型求得鲜秸秆的分段水解速率常数分别为0.1004 d−1和0.0188 d−1，干秸秆的分段水解速率常数为0.05658 d−1和0.02124 d−1。研究结果为玉米秸秆的强化水解工艺提供了参考依据。
王清静 , 王加雷 , 何 伟 , 李 东 , 冯鸿燕 , 闫志英 , 廖银章 , 刘晓风 . 玉米秸秆厌氧消化水解动力学[J]. 新能源进展, 2015 , 3(1) : 1 -6 . DOI: 10.3969/j.issn.2095-560X.2015.01.001
In order to explore a new process of intensified hydrolysis to solve the shortage of pretreatment. Fresh and dry corn stalk were used for batch anaerobic fermentation to study their hydrolysis characteristics with hydrolysis kinetic models under mesophilic conditions (35oC). The results demonstrated that hydrolysis kinetic models can’t effectively reveal the whole process of corn stalk, because of the disparity of hydrolysis rates in the process. There were two obvious inflection point on 2.75 d and 4 d of fresh and dry corn stalk in the hydrolysis process, respectively. The hydrolysis rate constant of fresh corn stalk was fast as much as 0.1004 d−1 before 2.75 d, and reduced to 0.0188 d−1 after that; the hydrolysis rate constant of dry corn stalk was 0.05658 d−1 and 0.02124 d−1, respectively. It would be a theory basis for theoretical reference intensified hydrolysis technology of corn stalk.
Key words： corn stalk; anaerobic digestion; hydrolysis; kinetic model
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