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© Research
Publication : Journal of Environmental Engineering

Characterization of soluble molecules from thermochemically pretreated sludge

Member: Valérie Bouchez
Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Journal of Environmental Engineering - 01 Jan 2000

Valérie Penaud; Jean-Philippe Delgenès; and René Moletta

J ENV ENG, 126(5), 2000, pp. 397-402

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.