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Kinetic analysis of anaerobic digestion of cattail by rumen microbes in a modified UASB reactor

Paper ID Volume ID Publish Year Pages File Format Full-Text
4730 240 2007 7 PDF Available
Title
Kinetic analysis of anaerobic digestion of cattail by rumen microbes in a modified UASB reactor
Abstract

The kinetics of anaerobic digestion of cattail by rumen microbes in a modified upflow anaerobic sludge blanket (UASB) reactor was systematically analyzed in this study. The Monod and first-order equations were combined to develop kinetic models to describe the substrate degradation, microbial growth and product formation. At an influent cattail concentration (volatile solids) of 12.1 g/L, hydraulic retention time of 0.75 day and solids retention time of 1.0–4.0 days, the concentration of reducing sugars was negligible, compared to the hydrolyzed cattail, indicating that the lignocellulosic hydrolysis was the rate-limiting step in the fermentation. The rate constant (k) of cattail degradation, true microbial growth yield (YEG) and the maintenance coefficient (m) were calculated as 1.50 day−1, 0.11 g/g and 0.103 g/(g h), respectively. The measured and estimated substrate degradation, microbial growth and product formation were in good agreement.

Keywords
Anaerobic digestion; Cattail; Kinetics; Lignocellulose; Rumen microbes; Upflow anaerobic sludge blanket (UASB)
First Page Preview
Kinetic analysis of anaerobic digestion of cattail by rumen microbes in a modified UASB reactor
Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 37, Issue 2, 15 November 2007, Pages 219–225
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering