Distiller’s dried grains with solubles(DDGS)is the side product of factories in which Ethanol is produced. Ethanol and carbon dioxide are gained by the fermentation of corn starch. Each corn bushel (25.4 kg)which is fermented in a dried-ethanol factory,will produce about 10.2 litres of ethanol,8.2 litres of Co2 and 8.2 kg of DDGS Yellow pastry corn is a great source of fermentable starch for producing Ethanol and DDGS. Corn contains 62% of starch, 3.8% of oil,8% of protein,11.2% of fiber and 15% of moisture. The most part of starch which exists in corn,changes to ethanol during the fermentation so, some nutritions (such as protein,fat and fiber)are twice or three times more in DDGS in compare with corn. Some ethanol supplier factories use sorghum,barley and wheat to produce ethanol. Therefore, nutritious compounds of DDGS which are gained from grains or corn, are different.
About 40% of fuel ethanol is produced in dry machines and 60% of other types of ethanol is produced in wet machines. Because the production of ethanol is different in dry and wet machines so,side corn products will contain different amount of nutritions. Dry machines produce DDGS and wet machines make corn gluten ration, corn gluten Feed and corn cortex powder. The results show that after grinding yellow pastry corn, 4 important products (according to theirDM basis )are produced, consisting corn starch(67.2%),corn gluten meal (19.6%) , corn gluten powder(60% of protein)and corn Germ meal(50% of fat).
In alcoholic drinks industries, DDGS is also produced (less than 1% of whole DDGS production)but this product is mainly dark in color and noticing the type and source of grains, its nutrient are less than the DDGS which is produced in Ethanol supplier factories(new method).
Dried barley which is the by product of beer industry,that uses dried remains of malting grains ,which are used in MaHo2 and Dextrin production. Because of high amount of dried grains in beer (18 _ 19%), it is limit to use it in the ration of monogastric animals.