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La technologie d’extrusion bi-vis, une solution originale et performante pour le bioraffinage du tournesol plante entière

Evon, Philippe and Vandenbossche, Virginie and Pontalier, Pierre-Yves and Rigal, Luc La technologie d’extrusion bi-vis, une solution originale et performante pour le bioraffinage du tournesol plante entière. (2010) Oléagineux, Corps gras, Lipides, 17 (6). 404-417. ISSN 1258-8210

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Official URL: http://www.john-libbey-eurotext.fr/fr/revues/agro_biotech/ocl/e-docs/00/04/61/7B/article.md?fichier=images.htm


The objective of this study is to evaluate the feasibility of an aqueous process for the biorefinery of sunflower whole plant using a co-rotating twin-screw extruder. Traditionally, aqueous extraction of oil is looked upon as an environmentally cleaner alternative technology to the solvent extraction (Rosenthal et al., 1996) and the twin-screw extruder carries out three essential unit operations continuously: conditioning and grinding of whole plant, liquid/solid extraction and liquid/solid separation. Wringing out the mixing is favoured thanks to the stalk fibers. However, drying of the cake meal is not optimal and lixiviation of cotyledon cells within the seed is incomplete. Extraction efficiency depends on the operating conditions: screw rotation speed, input flow rates of whole plant and water. In best conditions, oil yield is 57% and residual oil content in the cake meal is 14%. These conditions lead to the co-extraction of proteins, pectins and hemicelluloses. Protein yield is 44% and residual protein content in the cake meal is 7%. Oil is extracted in the form of two oil-in-water emulsions stabilized by phospholipids and proteins at interface. An aqueous extract containing part of the water-soluble constituents from whole plant, mainly proteins and pectins, is also generated. As a mixture of fibers and proteins, the cake meal can be moulded by thermo-pressing. Panels have promising mechanical properties in bending.

Item Type:Article
Additional Information:Thanks to John Libbey Eurotext editor. The original PDF of the article can be found at Oléagineux, Corps gras, Lipides website : http://www.john-libbey-eurotext.fr/fr/revues/agro_biotech/ocl/e-docs/00/04/61/7B/article.md?fichier=images.htm
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
Laboratory name:
Laboratoire de Chimie Agro-Industrielle - LCA (Toulouse, France) - Fractionnement et transformation des agroressources
Deposited On:28 Jan 2011 15:30

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