Chemical composition of extracted dried olive pomaces containing two and three phases

The chemical composition of extracted dried olive pomaces, obtained from extraction of systems containing two and three phases, was similar. The main component was fibre, with values above 70% in both systems. Nitrogen values and extractability was low for both systems, although in vitro protein digestibility was high (75–80%). Amino acid composition was balanced except for lysine. The isoelectric point was low, centred around pH 2.0. Soluble sugars and organic acids contents were similar as well as fatty acid composition of the extracted oil from olive pomace. Therefore, an oil extraction of a system of two phases is advisable as environmental problems could be reduced with the elimination of vegetation water, and similar applications could be carried out with both types after drying.