• What is industrial pressing of oilseeds?
  • Industrial pressing of oilseeds is realized using continuous screw presses. The presses are fed with crude or pre-treated seeds. Types of pre-treatments (thermal pre-treatment, size reduction, mechanical sieving, etc.) differ for various seed species (Carr 1997). Each type of seed pre-treatment provides its own advantages.
  • What are the different processing techniques of oilseeds?
  • Understanding of various processing techniques of oilseeds is very important. Pre-treatments like cleaning, dehulling, decortications, flaking and heat treatments assist to enhance the recovery and quality of oil during processing. Oil extraction methods including ghanies, hydraulic press, screw press and solvent extraction are discussed in detail.
  • Does a screw press affect oil yield?
  • In these experiments, the performance of the screw press (oil yield) followed a second order decreasing polynomial function of seed moisture content (Singh et al. 2002). The moisture content of seeds during the pressing process also affects the quality of oil.
  • How do screw presses increase oil recovery rates?
  • In order to achieve the extra oil recovery rates, the seed material has to be exposed to higher pressures over longer retention times in the screw presses. The higher pressures are primarily achieved by lower seed moisture leading to considerably higher friction in the presses.
  • Which oilseed is used for oil extraction?
  • Rapeseed and mustard are very popular oilseeds for the extraction of oil. Mustard is available in white, brown and black colours. The oil extraction technology contains, drying, cleaning, grading, storage of oilseeds, oil expression and storage of oil.
  • What happens during screw expeller processing of palm kernel seeds?
  • Heat transfer between the pressing chamber and the oil and oilcake streams during screw expeller processing of palm kernel seeds. Journal of Food Engineering, 31 (1), 1¨C7. Omobuwajo, T. O., Ige, M. T., & Ajayi, A. O. (1998). Theoretical prediction of extrusion pressure and oil flow rate during screw expeller processing of palm kernel seeds.