Corn dry milling as influenced by harvest and drying conditions
1982
Peplinski, A.J. | Anderson, R.A. | Brekke, O.L.
Sublots from a single var. of corn were harvested with moisture contents ranging from 17 to 32% and with the picker-sheller set to yield shelled grain with high or low damage. Each sublot was then dried to 11-14% moisture at air temp. from -1° to 150° C. Yields of prime products (low-fat grits and meal) from the dry milling of the lots increased and germ (source of corn oil) fraction yield decreased as corn drying temp. were lowered. Fat content of prime products showed no trend, while fat in the germ increased with lowering drying temp. Harvest moisture content and picker-sheller damage had minimal effect on product yields or on fat content. Recoverable oil was lowered by drying at 150° C. The variables studied produced minimal effects on brewers extract detn. (amount of carbohydrate available for enzymic conversion to sugars). Corn harvested at ≤25% moisture and dried at ≤82° C air temp. will yield optimum dry milling results with respect to product recovery and quality.
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