Expeller pressing (also called oil pressing) is a mechanical method for extracting oil from raw materials. The raw materials are squeezed under high pressure in a single step. When used for the extraction of food oils, typical raw materials are nuts, seeds and algae, which are supplied to the press in a continuous feed. Expeller presses can recover 75% of the oil from algae. As the raw material is pressed, friction causes it to heat up; in the case of harder nuts (which require higher pressures) the material can exceed temperatures of 120 °F (49 °C).
Read more about Expeller Pressing: Overview, Efficiency, Expanded Applications
Famous quotes containing the word pressing:
“What one is fated to have in life one will have; what one is not fated to have, there is no point in pressing for.”
—Chinese proverb.