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
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
WANG Qing-jing , WANG Jia-lei , HE Wei , LI Dong , FENG Hong-yan , YAN Zhi-ying , LIAO Yin-zhang , LIU Xiao-feng . Kinetics of Substrate Hydrolysis for Anaerobic Digestion of Corn Stalk[J]. Advances in New and Renewable Energy, 2015 , 3(1) : 1 -6 . DOI: 10.3969/j.issn.2095-560X.2015.01.001
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