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Profile of hydrolases and biogas production during two-stage mesophilic anaerobic digestion of solid potato waste

Paper ID Volume ID Publish Year Pages File Format Full-Text
36221 45125 2005 8 PDF Available
Title
Profile of hydrolases and biogas production during two-stage mesophilic anaerobic digestion of solid potato waste
Abstract

Two two-stage systems, one consisting of a solid-bed reactor for hydrolysis/acidification connected to an upflow anaerobic sludge blanket methanogenic reactor, and the other consisting of a solid-bed reactor connected to a methanogenic reactor packed with wheat straw biofilm carriers, were investigated with regard to hydrolytic enzymes and methane production during mesophilic anaerobic digestion of solid potato waste. Some of the enzymes used by microorganisms to degrade the potato were found to be amylase, carboxymethyl cellulase, filter paper cellulase, xylanase, pectinase and protease. Both free and cell-bound enzyme activities were measured. The activity of the free enzyme was higher than that of the cell-bound for all the enzymes. The amylase activity was highest, followed by carboxymethyl cellulase and filter paper cellulase, while the other hydrolytic enzymes had low activities. The methane yield (0.39 m3/kg VSadded) and the cumulative methane production was the same in both systems. The system with packed straw bed degraded the organic matter faster than the system with the UASB methanogenic reactor.

Keywords
Anaerobic digestion; Biogas; Methane yield; Hydrolytic enzymes; Amylase; Cellulase; Xylanase; Solid potato waste
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Profile of hydrolases and biogas production during two-stage mesophilic anaerobic digestion of solid potato waste
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 40, Issue 9, September 2005, Pages 2945–2952
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us