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An overview on olive mill wastes and their valorisation methods

AutorRoig, Asunción ; Cayuela, María Luz ; Sánchez-Monedero, Miguel Ángel
Palabras claveOlive mill wastes
Olive oil industry
Fecha de publicación2006
CitaciónWaste Management 26(9): 960-969 (2006)
ResumenOlive mill wastes represent an important environmental problem in Mediterranean areas where they are generated in huge quantities in short periods of time. Their high phenol, lipid and organic acid concentrations turn them into phytotoxic materials, but these wastes also contain valuable resources such as a large proportion of organic matter and a wide range of nutrients that could be recycled. In this article, recent research studies for the valorisation of olive mill wastes performed by several authors were reviewed: second oil extraction, combustion, gasification, anaerobic digestion, composting and solid fermentation are some of the methods proposed. Special attention was paid to the new solid waste generated during the extraction of olive oil by the two-phase system. The peculiar physicochemical properties of the new solid waste, called two-phase olive mill waste, caused specific management problems in the olive mills that have led to the adaptation and transformation of the traditional valorisation strategies. The selection of the most suitable or appropriate valorisation strategy will depend on the social, agricultural or industrial environment of the olive mill. Although some methods are strongly consolidated in this sector, other options, more respectful with the environment, should also be considered
Descripción10 pages, 2 tables, 2 figures.
Versión del editorhttp://dx.doi.org/10.1016/j.wasman.2005.07.024
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