• Can a co-rotating twin-screw extruder extract sunflower oil?
  • A limited number of studies have been conducted on the development of an aqueous extraction process using a co-rotating twin-screw extruder for the recovery of sunflower oil (Evon et?al., 2007, Evon et?al., 2009, Evon et?al., 2010a, Evon et?al., 2010b).
  • Can a counter-rotating twin-screw extruder be used with dehulled sunflower seeds?
  • The use of a counter-rotating twin-screw extruder with dehulled sunflower seeds seems to result in a particularly high process efficiency and productivity, at a relatively low cost (0.11?kW¡¤h/kg oil produced) (Isobe et?al., 1992). However, in this case, the cost of the dehulling treatment should be taken into account.
  • Does a twin-screw extruder reduce oil recovery?
  • As an illustration, a decrease in oil recovery from 82 to 62% was found during the thermomechanical pressing of sunflower seeds using a twin-screw extruder of increasing volume and an increased feed rate from 14 to 22?kg/h, respectively, while maintaining the raw material characteristics and operating conditions (Dufaure et?al., 1999a).