After the corn kernels are soaked and softened, the lightest corn germ (1) can be separated through crushing. The corn germ can be squeezed into oil, which is what we call corn germ oil. The remaining part continues to be crushed, and then the seed coat (2) is separated using a sieve. This part is mainly fiber and is usually used for feed. What remains at this point are the components of the endosperm (3), which are mainly a mixture of starch, protein and water. Starch and protein have different specific gravity. You can use a high-speed centrifuge to separate them, and then dry them separately to remove the water, and you can get white starch and yellow corn gluten powder.

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