Agro-food Wastes pre-treatment - subcritical water

NID characterized the three selected agro-industrial residues, brewery’s spent grains, tomato pomace and potato peels, and performed an acidic hydrolysis as a baseline for comparison between project partners. In parallel, NID developed a subcritical waste pre-treatment. This pretreatment showed better results for the brewery’s spent grains and the potato peels residues. For both materials the temperature of 190 ºC seems to be the most suitable, with low concentration of degradation products being produced, exception made for the lactic acid present on the PP SCW hydrolysate.