Journal
BIORESOURCE TECHNOLOGY
Volume 100, Issue 9, Pages 2575-2579Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2008.12.012
Keywords
Anaerobic; Biodegradability; Hydrolysis; Lignin; Pre-treatment
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The effects of different thermo-chemical pre-treatment methods were determined on the biodegradability and hydrolysis rate of lignocellulosic biomass. Three plant species, hay, straw and bracken were thermo-chemically pre-treated with calcium hydroxide, ammonium carbonate and maleic acid. After pre-treatment, the plant material was anaerobically digested in batch bottles under mesophilic conditions for 40 days. From the pre-treatment and subsequent anaerobic digestion experiments, it was con-concluded that when the lignin content of the plant material is high, thermo-chemical pre-treatments have a positive effect on the biodegradability of the substrate. Calcium hydroxide pre-treatment improves the biodegradability of lignocellulosic biomass, especially for high lignin content substrates, like bracken. Maleic acid generates the highest percentage of dissolved COD during pre-treatment. Ammonium pretreatment only showed a clear effect on biodegradability for straw. (C) 2008 Elsevier Ltd. All rights reserved.
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