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Optimization Of Sulfur Dioxide And Lactic Acid Steeping Concentrations For Wet-Milling Of Grain Sorghum, R. A. Buffo, Curtis L. Weller, A. M. Parkhurst

Department of Biological Systems Engineering: Papers and Publications

Influence of sulfur dioxide (SO₂) and lactic acid (LA) on grain sorghum steeping efficiency in terms of wet-milling characteristics was investigated using response surface analysis. Tested ranges of concentrations in steeping water were 0.050 to 0.278% and 0 to 0.282% for SO₂ and LA, respectively. Measured wet-milling variables were steeping solids yield, starch yield, protein yield, fiber/germ yield, starch recovery, protein recovery and protein content of starch. Starch and protein recovery values were highly correlated to each other (r = 0.74). Correlations of these attributes with fiber/germ yield were strongly negative (r = –0.96 and r = …