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The twin-screw extrusion technology, an original and powerful solution for the biorefinery of sunflower whole plant

Evon, Philippe and Vandenbossche, Virginie and Pontalier, Pierre-Yves and Rigal, Luc The twin-screw extrusion technology, an original and powerful solution for the biorefinery of sunflower whole plant. (2010) In: 18th European Biomass Conference and Exhibition, 3-7 May 2010, Lyon, France .

(Document in English)

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Official URL: http://dx.doi.org/10.5071/18thEUBCE2010-OB10.5


The objective of this study was to evaluate the feasibility of an aqueous process for the biorefinery of sunflower whole plant using a twin-screw extruder. Aqueous extraction of oil was chosen as an environment-friendly alternative to the solvent extraction. The extruder was used to carry out three essential unit operations: grinding, liquid/solid extraction, and liquid/solid separation. Wringing out the mixing was effective. However, drying of the cake meal was not optimal. Lixiviation of cotyledon cells was also incomplete. Extraction efficiency depended on operating conditions: screw rotation speed, and input flow rates of whole plant and water. In the best conditions, oil yield was 57%. Residual oil content in the cake meal was 14%. These conditions leaded to the co-extraction of proteins, pectins, and hemicelluloses. The corresponding protein yield was 44%. Oil was extracted in the form of two oil-in-water emulsions. These hydrophobic phases were stabilized by phospholipids and proteins at interface. An aqueous extract containing part of the water-soluble constituents, mainly proteins and pectins, was also generated. As a mixture of fibers and proteins, the cake meal was molded by thermo-pressing. Panels produced had interesting mechanical properties in bending. The obtained fractions may have applications as bases for industrial products.

Item Type:Conference or Workshop Item (Paper)
Additional Information:European Biomass Conference and Exhibition Proceedings published (ISBN 978-88-89407-56-5)
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Laboratory name:
Laboratoire de Chimie Agro-Industrielle - LCA (Toulouse, France) - Fractionnement et transformation des agroressources
Deposited On:29 Mar 2011 07:31

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