Pre-treatment mechanisms during thermophilic-mesophilic temperature phased anaerobic digestion of primary sludge

Huoqing, Ge, Jensen, Paul D. and Batstone, Damien J. (2010) Pre-treatment mechanisms during thermophilic-mesophilic temperature phased anaerobic digestion of primary sludge. Water Research, 44 1: 123-130. doi:10.1016/j.watres.2009.09.005


Author Huoqing, Ge
Jensen, Paul D.
Batstone, Damien J.
Title Pre-treatment mechanisms during thermophilic-mesophilic temperature phased anaerobic digestion of primary sludge
Journal name Water Research   Check publisher's open access policy
ISSN 0043-1354
Publication date 2010-01
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.watres.2009.09.005
Volume 44
Issue 1
Start page 123
End page 130
Total pages 8
Editor Mogens Henze
Place of publication Pergamon
Publisher United Kingdom
Collection year 2010
Language eng
Subject C1
Abstract Pre-treatment is used extensively to improve degradability and hydrolysis rate of material being fed into digesters. One emerging process is temperature phased anaerobic digestion (TPAD), which applies a short (2 day) 50–70 °C pre-treatment step prior to 35 °C digestion in the main stage (10–20 days). In this study, we evaluated a thermophilic–mesophilic TPAD against a mesophilic–mesophilic TPAD treating primary sludge. Thermophilic–mesophilic TPAD achieved 54% VS destruction compared to 44% in mesophilic–mesophilic TPAD, with a 25% parallel increase in methane production. Measurements of soluble COD and NH4+-N showed increased hydrolysis extent during thermophilic pre-treatment. Model based analysis indicated the improved performance was due to an increased hydrolysis coefficient rather than an increased inherent degradability, suggesting while TPAD is suitable as an intensification process, a larger main digester could achieve similar impact.
Keyword Temperature phased anaerobic digestion
Thermophilic pre-treatment
Mesophilic pre-treatment
Primary sludge
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Online 8/9/09

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
Advanced Water Management Centre Publications
 
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Created: Sun, 10 Jan 2010, 00:00:08 EST