• How screw press conditions affect rapeseed oil yield?
  • The operating screw pressing conditions can significantly affect the oil yield from rapeseed. For a given screw press and seed, the main factors affecting the rapeseed oil yield are nozzle diameter, head press temperature, and screw frequency.
  • How to maximize rapeseed oil yield?
  • In the present study, the optimization aimed to maximize rapeseed oil yield by selecting the suitable screw pressing conditions, i.e., the best nozzle diameter, press head temperature, and screw frequency in the applied experimental domain, by employing the desirability function method.
  • How much rapeseed oil can be extracted by cold pressing?
  • A nozzle diameter of 10 mm, a screw frequency of 50 Hz, and a press head temperature of 80 ¡ãC ensured the maximum pressed rapeseed oil yield of 26.65% within the applied experimental domain. The crude oil extraction degree achieved by cold pressing was 60.8% of the rapeseed oil yield obtained by the Soxhlet method.
  • Does cold screw pressing affect the fatty acid profile of rapeseed oil?
  • However, the recovery methods used (cold screw pressing, hydraulic pressing, and Soxhlet extraction using petroleum ether) and the operating conditions of cold screw pressing in the applied ranges did not affect the fatty acid profile of the rapeseed oil.
  • How is rapeseed oil obtained?
  • Rapeseed oil was obtained by cold pressing in a laboratory hydraulic press (Sirio, Mikodental, 10-ton strength, 40 MPa maximum pressure) at room temperature. The procedure was done in triplicate. Upon pressing, oil samples were immediately analyzed.
  • What is the oil content of rapeseed seeds?
  • The oil content of the seeds was 40.9?¡À?0.1%. The rapeseed oil was obtained using an oil screw press (Model SPU 20, Elektromotor-?imon, Senta, Serbia) using various nozzle diameters (8¨C12 mm), temperatures of the press head (40¨C80 ¡ãC), and screw frequencies (40¨C60 Hz). A nozzle was set at the exit from the pressing chamber.