Biotechnological Upgrade of Fruits Waste Biomass: A Preliminary Assessment
Year: 2010
Type: conference-paper
Abstract: The annual production of fruits in Navarre (Spain) and Aquitania (France) is approximately 454.123 tons and vegetable production was about 1.202.762 tonnes (2003-2007 MARM and Eurostat). Considering current production processes approximately 12% of the amounts processed are wastes. This percentage could be increased until 40-60% depending on the process, so annual production of organic wastes could be approximately between 200.000 -800.000 tonnes/annual. Kiwi, peach and strawberry by-products from fruits food processing industry were tested as possible feedstocks for 2nd generation biofuels production and bioactive compounds extraction. In a biorefinery concept, fruits residues were previously subjected to different environment friendly extractions to obtain their high added value contents, and afterwards, wastes from these processes were upgraded for bioethanol and/or biomethane production. In this work, bioactive compounds were extracted from selected fruits by-products. Characterization of antioxidant capacity and different vitamins were carried out. The extraction of these compounds was made by supercritical fluid extraction (SFE) and Spray-Drying technology (SD). According to bioethanol production, a compositional analysis of the wastes was done. It has been proven that concentrations of soluble sugars of fruits ca increase 30 -100% by enzymatic hydrolysis depending on the fruit increasing considerably bioethanol yields. According to biogas production, methanogenic potential varies between 250 and 300 Nm3/tVS for fruit wastes. The residues of vegetables ranged from 320 to 550 Nm3/tVS. A test pilot reactor has shown that the codigestion with other fermentable waste is certainly the best solution to produce biogas energy. This project was funded by Interreg IV A program and Navarre-Aquitania funding during years 2007-2009 (DOVAREC II).
Source: ETA Florence
Authors: Zazpe, M., Ortigosa, I., Del Campo, I., Alegria, I., Martinez, O., Echeverría, I., Saiz, M.J., Romo, A., Garayoa, E., González, C.J., Pouech, P., Ferrer, C., Galibardy, C.
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2625716531