Spent grain are also called lees. The remaining residues produced during the winemaking process are considered waste by most people, but they are not.
Spent grain are rich in crude protein, which is about 2-3 times higher than that of corn, as well as vitamins, yeast, lysine, methionine and tryptophan and other trace elements. It is a rare fattening feed. Moreover, the lees contains a certain amount of alcohol, and most farmers use it with accessories to raise cattle and other animals. It can make cattle dizzy, grow fast and strong, and reduce the amount of concentrated feed, so the economic benefits of cattle raising are greatly increased.
Then the spent grain can be used directly as feed, why use a dryer to dry it?
Spent grain are something with a high water content, so it cannot be stored and reprocessed well. Moreover, the transportation cost is relatively high, and it is easy to cause pollution to the vicinity of the winery. Drying it can avoid these problems. One is that it can take more time to sell it to the feed factory for process-based processing, and after drying, spent grain are lighter, and the relative transportation cost is much less. More to increase the profit of the winery, and then to reduce the water pollution of the winery.
DDGS dryer can speed up the drying of the spent grain and increase the processing time, so the effect of the spent grain drying is still very large, and it is a good tool for the winery/feed factory to increase income.
