Suchergebnisse

In the search for renewable energy resources, bioconversion to methane from lignocellulosic biomasses is one of the most promising alternatives. However, the selection of resources depends not only on their availability but also on their biophysico-chemical characteristics. Their structure, composition and presence of undesirable fractions affect their bioconversion to methane. In this study, the overall characteristics (content of total organic matter, water-soluble organic matter), biochemical (soluble fractions, hemicellulose, cellulose and residual fraction) and bioreactivity (biological oxygen demand measurement — BDO28, and biomethanogenic potential — PBM60) were measured on 25 samples. The comparison of the data by the statistical method of analysis by main component (ACP) led to the identification of the correct correlation between PBM60 and BOD28, and an inverse correlation with the residual RES content, corresponding to the woody fraction of organic matter. On the other hand, there seems to be no correlation between PBM and organic matter levels (MV, COD or TOC), water-soluble COD (COD) and the three soluble biochemical fractions, hemicellulose and cellulose. The results of this study therefore indicate that the prediction of PBM requires the identification of other parameters that would allow the structural characteristics of lignocellulosic biomass to be taken into account. ; International audience In the selection for renewable energy resources, the bioconversion of biomasses rich in lignocellulose in methane is one of the most promising alternatives. However, the selection of the resources depends not only on their availability but also on their organicphysico-chemical characteristics. Their structure, their composition and the presence of unwanted fractions have consequences on their bioconversion in methane. In this study, the global characteristics (total organic matter, water soluble organic matter), biochemical fractionation (soluble fractions, hemicellulose, cellulose and residual fraction) ...