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Food Science

Food Science and Human Nutrition Publications

Fuel ethanol

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Full-Text Articles in Life Sciences

Effects Of Kernel Breakage And Fermentation On Corn Germ Integrity And Oil Quality, Hui Wang, Tong Wang, Lawrence A. Johnson Sep 2010

Effects Of Kernel Breakage And Fermentation On Corn Germ Integrity And Oil Quality, Hui Wang, Tong Wang, Lawrence A. Johnson

Food Science and Human Nutrition Publications

To investigate the ability of corn germ to withstand the fuel ethanol fermentation process without major damage to germ integrity and germ oil quality, five treatments were designed to explore degerming before fermentation (front-end) and after fermentation (tail-end), and the feasibility of breaking the kernel with minimum shear forces (wet-split). Germ from low-shear (wet-split) tail-end degerming maintained its integrity during the process. The wet-grind pretreatment caused 22% germ damage, and the subsequent fermentation caused 18% additional germ damage. The germ recovered after fermentation showed physical strength similar to that of those isolated by wet means before fermentation. The oils extracted ...


Effect Of Low-Shear Extrusion On Corn Fermentation And Oil Partition, Hui Wang, Tong Wang, Lawrence A. Johnson Mar 2009

Effect Of Low-Shear Extrusion On Corn Fermentation And Oil Partition, Hui Wang, Tong Wang, Lawrence A. Johnson

Food Science and Human Nutrition Publications

To study oil distribution in fermentation liquid and solids for the purpose of recovering oil from corn stillage by centrifugation, a low-shear single-screw extruder was used to treat corn for dry-grind ethanol fermentation. Five different treatments for corn were used, and their effects on ethanol fermentation, oil distribution, and oil extractability were studied. Extruded corn with different particles sizes had similar ethanol yields (33% based on corn) because the starch was equally gelatinized by extrusion. Pretreatment with larger particle size before extrusion tended to have higher free oil than pretreatment with smaller particle sizes, but the effect was not dramatic ...


Effect Of The Corn Breaking Method On Oil Distribution Between Stillage Phases Of Dry-Grind Corn Ethanol Production, Hui Wang, Tong Wang, Lawrence A. Johnson, Anthony L. Pometto Iii Nov 2008

Effect Of The Corn Breaking Method On Oil Distribution Between Stillage Phases Of Dry-Grind Corn Ethanol Production, Hui Wang, Tong Wang, Lawrence A. Johnson, Anthony L. Pometto Iii

Food Science and Human Nutrition Publications

The majority of fuel ethanol in the United States is produced by using the dry-grind corn ethanol process. The corn oil that is contained in the coproduct, distillers’ dried grains with solubles (DDGS), can be recovered for use as a biodiesel feedstock. Oil removal will also improve the feed quality of DDGS. The most economical way to remove oil is considered to be at the centrifugation step for separating thin stillage (liquid) from coarse solids after distilling the ethanol. The more oil there is in the liquid, the more it can be recovered by centrifugation. Therefore, we studied the effects ...