Which extraction method is best for sunflower seeds?
Therefore, prepress solvent extraction, with the highest oil recovery yield, is the process method utilized today for the majority of the sunflower seed that is crushed globally.
What is the composition of sunflower seed?
Sunflower seed is characterized by a high oil content of 40¨C45% with 14¨C18% proteins and 25¨C30% hulls that predominantly consist of nondigestible crude fiber. A typical analysis is illustrated in Figure 8.9. Figure 8.9. Seed composition. Sunflower seed processing focuses on sunflower oil as the most valuable product.
What is the hull content of sunflower seeds?
Botanical hull content of sunflower seeds varies between 25% and 30% and depends on the type of cultivar, seed size, and also climate conditions during growing. Hulls are very rich in crude fiber (50¨C60%) and contain only small amounts of proteins (4¨C6%) and oil (1¨C2%) as illustrated in Table 8.B.
How is sunflower crushed for oil recovery?
Sunflower is crushed for oil recovery via one of two process methods, hard pressing or prepress solvent extraction. Hard pressing relies upon exerting high pressure on the prepared seed to separate oil from the solids fraction, historically recovering about 25% oil from the seed.