In the preparation plant (Fig. 2), the seeds are successfully cleaned, weighted, conditioned, cracked, dehulled and flaked. Hulls purification is the process of reclaiming the small particles of soybean meats and fines from the soybean hulls removed during conditioning and cracking/dehulling.
How is crude oil produced in a soybean crushing plant?
The crude oil is usually water degummed in the crushing plant which generates an additional flow, consisting of gums (or lecithin). Table 1 presents the main quality parameters (optimal contents) of the major products from soybean crushing.
What is the residual oil content of soybean meal?
It is critical to avoid the presence of cracks in order to get reasonable residual oil content in the meal. In a modern and efficient extraction plant (Fig. 9), a residual oil content ¡Ü?0.5% for soybean meal is expected.
What solvent is used to make soybean protein concentrate?
It should be noted that other solvents may be required to produce different and specific products; for example, an alcohol-water mixture is used in an additional extraction step (after hexane extraction) to produce soy protein concentrate (or ¡°SPC¡±) by removing the sugars from standard soybean meal (Wang et al., 2004).