Soybean oil refining including degumming (removing of phosphatides), alkali refining (washing with alkaline solution to remove free fatty acids, colorants, insoluble matter and gums) and bleaching (with activated earth or activated carbon to remove colour and other impurities.
Does a soybean pressing machine boost oil yield?
Studies reveal that with the same seed quality, a foremost soybean pressing machine can boost oil yield by 2-3%. It may appear small, but the cumulative effect is significant, especially for large-scale soybean oil manufacturers. Moreover, premium equipment offers a longer service life compared to subpar alternatives.
How is soybean oil prepared?
Preparing soybean oil involves cracking and dehulling, where soybeans are cracked open to break into smaller pieces. Once cracked, the outer hulls are carefully removed with the help of a machine called a Dehuller. It results in the revealing of the cotyledons, which are the embryonic seed leaves of the soybean.
What is deodorization in soybean oil refining?
Deodorization is the final stage of soybean oil refining. Here, the oil is heated under vacuum to remove any volatile compounds and lingering odor. Steam is used to take away these undesirable components, resulting in a odorless and clean product, which is suitable for consumption.