Exchange of some questions about DDGS 01

Q: what's the difference between DDGS and DDS? Is there the most economical production process? What is the difference in emergy between DDG and DDGS? Answer: DDG: it is obtained by partially drying the solids of the distillation waste liquid with bright colors. DDS: it is obtained by concentrating and drying the residual liquid from which the solid is removed. DDGS: a mixture of DDG and DDS, dark distiller's grains. Current fermentation technology, differential pressure distillation technology and low temperature drying technology are used in new fuel ethanol plants. For example, the deep processing of corn can be divided into whole grain method, wet method and dry method. The economic cost of the drying process is high, there is no evaporative concentration device, DDS can not be recovered, wet grain DDG can be directly used in local animal farms to save costs. There are great differences in the quality of products from different manufacturers or from the same manufacturer. Generally speaking, there is little difference between the emergy of DDGS and DDG: for example, digestible energy: DDG,14.35MJ/KG;DDGS,13.10MJ/KG (pig) Q: what is the content of sulfur in DDGS? Answer: thiosulfonic acid is used to adjust the PH value, and the addition amount is different from different manufacturers. The content of sulfur in corn DDGS is 0.34% Rose 1.05%. Q: the variation of lysine in DDGS? A: lysine and tryptophan in DDGS are deficient and vary greatly. The average lysine is 0.89%, the range is 0.61-1.06%. Q: if the backfilling ratio of DDS in DDGS is different, how does its nutritional composition change? A: the higher the backfilling ratio of DDS is, the lower the protein content is, the higher the fat content is, and the higher the phosphorus content is. For example, DDGS products of DDG/DDS (60max 40): crude protein 28.2%, crude fat 10.0%, P0.81%; for example, DDGS products of DDG/DDS (80max 20): crude protein 31.4%, crude fat 8.6%, P0.68%. Q: what are the effects of DDGS and other by-products on animal growth and health, and how to prevent them? Answer: when using this kind of by-product, we must grasp the exact nutritional composition, advantages and disadvantages of the by-product. In addition, attention should be paid to animal health: 1) mycotoxin problem: the by-product has high moisture content, the grain has been damaged, and the mold is easy to grow, so the mycotoxin content is very high, and there may be many kinds of mycotoxins. can cause mycotoxin poisoning in livestock. It leads to low immunity and easy to occur, and the production performance is decreased. Therefore, anti-mildew agents and broad-spectrum mycotoxin adsorbents must be used. 2) because of the high proportion of unsaturated fatty acids in DDGS, it is easy to oxidize, which is disadvantageous to animal health and decreases energy value, which affects production performance and product quality such as carcass quality and milk quality. So use antioxidants. 3) Anti-nutritional factors: the fiber content of by-product DDGS rice bran is high, which can not be used by monogastric animals. Therefore, enzyme preparation is used to improve the utilization rate of fiber in animals. In addition, some by-products may have plant lectins, gossypol and so on, and their activity should be greatly reduced after processing. 4) the possibility of contamination by other pathogens. Q: is there a problem of palatability when adding too much DDGS? A: improper use of DDGS from dried corn lees will affect the palatability of the feed. Take DDGS as an example, the smell of alcohol is very strong when it comes out of the factory, and it is used to produce pig feed. The addition of 5% MF6% will lead to a decrease in the palatability of the feed, but after a period of storage, the pungent smell will be significantly weakened and the palatability will be improved. -- A good post I have learned ~-communicate a lot-- Thank you. It is of practical value.