Wet Milling Process of Corn Starch
Aug 06, 2024
Corn starch wet milling has always been a common method for corn starch production.
Shelled corn is cleaned and steeped in large tanks in a warm, acidic solution of water and sulfur dioxide. This solution softens the kernel, which makes it easier to mill. The water is boiled off, and the milling process loosens the hull (pericarp) and endosperm from the germ. After passing through a series of grinders and screens, the endosperm is isolated and processed into a slurry, which contains mostly pure corn starch. When dried, this starch is unmodified; it can be refined even more to make modified starches intended for specific cooking applications.
Shelled corn is cleaned and steeped in large tanks in a warm, acidic solution of water and sulfur dioxide. This solution softens the kernel, which makes it easier to mill. The water is boiled off, and the milling process loosens the hull (pericarp) and endosperm from the germ. After passing through a series of grinders and screens, the endosperm is isolated and processed into a slurry, which contains mostly pure corn starch. When dried, this starch is unmodified; it can be refined even more to make modified starches intended for specific cooking applications.
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