Author, as appears in the article.: Olkiewicz M; Caporgno M; Fortuny A; Stüber F; Fabregat A; Font J; Bengoa C
Department: Enginyeria Química
URV's Author/s: Bengoa, Christophe José / CAPORGNO, MARTIN PABLO / Fabregat Llangostera, Azael / Fabregat Sanjuan, Albert / Font Capafons, José / Fortuny Sanromà, Agustín / OLKIEWICZ, MAGDALENA ANNA / Stüber, Frank Erich
Keywords: Sewage sludge Liquid-liquid extraction Lipids Lipid Biodiesel Acidification
Abstract: Municipal sludge from wastewater treatment plants is a promising lipid feedstock for biodiesel production as it contains a significant amount of lipids. However, the energy necessary to remove its high water content is a major inconvenience for scaling up because of the high associated cost. In addition, the expensive conventional sludge drying methods are not effective enough for lipid recovery, thus reducing the potential biodiesel production. This study explores an alternative method, the direct sequential liquid-liquid extraction, which was performed in a batch mixer-settler reactor at room temperature, using hexane as a solvent, after previous sludge acidification showed significant increase in the lipid efficiency. The optimisation study demonstrated that, after three stages, 91% of lipid from primary sludge was recovered. The optimised extraction gave slightly higher lipid (27%, dry sludge) than the standard method (25%, dry sludge), supporting the suitability of the proposed process. Finally, this work demonstrates that the residual lipid-extracted sludge is still a good feedstock for energy production via anaerobic digestion. Anyway, the economic and environmental aspects of biodiesel production from sewage sludge could be improved. © 2014 Elsevier B.V.
Thematic Areas: Química Materiais Interdisciplinar General chemical engineering Fuel technology Ensino Engineering, chemical Engenharias iv Engenharias iii Engenharias ii Engenharias i Energy engineering and power technology Energy & fuels Ciências ambientais Ciências agrárias i Ciência de alimentos Ciência da computação Chemistry, applied Chemical engineering (miscellaneous) Chemical engineering (all) Biotecnología Astronomia / física
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 03783820
Author's mail: agustin.fortuny@urv.cat frankerich.stuber@urv.cat christophe.bengoa@urv.cat afabrega@urv.cat jose.font@urv.cat a.fabregat@urv.cat
Author identifier: 0000-0001-9424-1400 0000-0001-9160-5010 0000-0002-5525-5401 0000-0002-4007-7905 0000-0002-2878-1369
Record's date: 2024-09-28
Papper version: info:eu-repo/semantics/acceptedVersion
Link to the original source: https://www.sciencedirect.com/science/article/pii/S0378382014003324
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Fuel Processing Technology. 128 331-338
APA: Olkiewicz M; Caporgno M; Fortuny A; Stüber F; Fabregat A; Font J; Bengoa C (2014). Direct liquid-liquid extraction of lipid from municipal sewage sludge for biodiesel production. Fuel Processing Technology, 128(), 331-338. DOI: 10.1016/j.fuproc.2014.07.041
Article's DOI: 10.1016/j.fuproc.2014.07.041
Entity: Universitat Rovira i Virgili
Journal publication year: 2014
Publication Type: Journal Publications