Study of the Influence of Pre-Treatment in the Grape Waste Biogas Generation

Extremadura (CICYTEX), Spain

Abstract: In this study, the influence of the treatment of grape pomace residues on the methane potential obtained in batch and semi-continuous regime during the anaerobic digestion process is evaluated. The results of methane potentials corresponding to experiments carried out in this work with residues subjected to milling treatments are better than those that have not been treated in this way (295 LN kg VS-1 and 285 LN kg VS-1 versus 390 LN kg VS-1 and 380 LN kg VS-1). As a consequence, semi-continuous experiments have been carried out studying mixtures of the grape pomace residue together with other substrates in the digester using milled and unmilled residue. Additionally, the anaerobic digestion process has been evaluated at the pilot plant scale in order to verify the results obtained in the laboratory and establish the way to proceed in a real installation.