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United States Department of Agriculture

Agricultural Research Service

Title: Recovery of Starch and Protein from Wet-Milled Corn Fiber

Author
item Dowd, Michael

Submitted to: Cereal Chemistry
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: May 14, 1997
Publication Date: N/A

Interpretive Summary: Physical and chemical methods were used to recover additional starch and protein from the fiber fraction of the corn wet-milling process. A single additional milling of the fiber yielded 18% of the fiber mass as a starch and protein slurry after separating the fiber by screening. Two-thirds of this material was recovered as starch with a protein contamination of 0.66%. The milling also increased the fraction of fine fiber (40-325 mesh material) from 4.5% in the starting material to 11.5% after a single milling. Additional milling passes increased the yields of mill starch and fine fiber by small amounts with a corresponding decrease in the yield of coarse fiber. Pretreatment with combinations of lactic and sulfurous acids had only modest effects on the component yields and compositions of the treated fibers.

Technical Abstract: Physical and chemical methods were used to recover additional starch and protein from wet-milled corn fiber. A single additional milling of the fiber yielded 18% of the fiber mass as mill starch. By tabling, two-thirds his material was recovered as starch with a protein contamination of 0.66%. The processing also increased fine fiber from 4.5% in the starting material to 11.5% after a single milling. Additional milling passes increased the yields of mill starch and fine fiber by small amounts with a corresponding decrease in the yield of coarse fiber. Pretreatment with combinations of lactic and sulfurous acids had only modest effects on the component yields and compositions of the treated fibers.

Last Modified: 7/28/2014
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