Characterization of Soluble Molecules from Thermochemically Pretreated Sludge
Publication: Journal of Environmental Engineering
Volume 126, Issue 5
Abstract
Soluble molecules generated during the thermochemical pretreatment of an industrial microbial biomass were characterized by a dark color and a poor anaerobic biodegradability. Fractionation of this thermochemically pretreated microbial biomass has been investigated in order to identify inhibitory or refractory fractions. An adsorbent resin (Amberlite XAD 7HP) was selected for its ability to partially remove color from the pretreated substrate. Resin treatment or acid precipitation (pH = 3) were both effective in increasing biodegradability and removing biotoxicity from the pretreated microbial biomass. The increase in biodegradability was found to be the consequence of elimination of high-molecular-weight compounds through resin treatment or pH precipitation.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 126 • Issue 5 • May 2000
Pages: 397 - 402
History
Received: Sep 16, 1998
Published online: May 1, 2000
Published in print: May 2000
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