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Title: Influence of low temperature thermal pre-treatment on sludge solubilisation, heavy metal release and anaerobic digestion
Authors: Appels, Lise ×
Degrève, Jan
Van der Bruggen, Bart
Van Impe, Jan
Dewil, Raf #
Issue Date: Aug-2010
Publisher: Elsevier Applied Science
Series Title: Bioresource Technology vol:101 issue:15 pages:5743-5748
Abstract: In this work, the influence of a low temperature (70-90 degrees C) thermal treatment on anaerobic digestion is studied. Not only the increase in biogas production is investigated, but attention is also paid to the solubilisation of the main organic (proteins, carbohydrates and volatile fatty acids) and inorganic (heavy metals, S and P) sludge constituents during thermal treatment and the breakdown of the organic components during the subsequent anaerobic digestion. Taking into account the effects of the treatment on the sludge composition is of prime importance to evaluate its influence on the subsequent anaerobic digestion and biogas production using predictive models. It was seen that organic and inorganic compounds are efficiently solubilised during thermal treatment. In general, a higher temperature and a longer treatment time are beneficial for the release. The efficiency of the subsequent anaerobic digestion slightly decreased for sludge pre-treated at 70 degrees C. At higher pre-treatment temperatures, the biogas production increased significantly, up to a factor 11 for the 60 min treatment at 90 degrees C. (C) 2010 Elsevier Ltd. All rights reserved.
URI: 
ISSN: 0960-8524
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Bio- & Chemical Systems Technology, Reactor Engineering and Safety Section
Process Engineering for Sustainable Systems Section
Sustainable Chemical Process Technology TC, Technology Campus De Nayer Sint-Katelijne-Waver
Sustainable Chemical Process Technology TC
× corresponding author
# (joint) last author

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