• 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.
  • 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.
  • What is cold press oil processing?
  • Cold press oil processing is a method where heat exposure is minimized to offer the highest recovery of oil in a single pass. In oilseed processing, the primary goal is to extract as much oil as possible from the seed while consuming as little energy as possible. The result is two end products: oil and the leftover solids, traditionally called meal.
  • What are the different types of presses used in oil mills?
  • Pressing can be defined as a compression step to exude a liquid from a porous matrix (Schwartzberg 1997). Two types of presses are mainly used in oil mill: hydraulic presses and screw presses. This distinction reflects the historical process.
  • Do different types of oilseeds produce the same pressing performance?
  • Many authors have tested different varieties of a same oilseed species in identical conditions and compared the resulting pressing performance (Table 3).
  • What is the compression ratio of a seed press?
  • These forces are of two types: radial (thrust on the cage) and axial (taking forward the matter in the press) (Laisney 1984). The ratio of available volumes between inlet and outlet of the press V1 / V2 gives the compression ratio of the press. Ideally, this ratio should be around 4 to 4.5 for seed containing 50 % of oil.