Effect of heat treatment process on feed nutrients in feed processing

The heat treatment process in the feed processing process has a significant impact on feed nutrients, which mainly includes the following points：

 1.Steam tempering: Steam tempering treats the feed with high humidity and high temperature before granulation, which helps starch gelatinization and protein denaturation, and improves the palatability and digestibility of the feed.Appropriate tempering time (such as livestock feed 1030s, fish and shrimp feed 120300s) and temperature (about 83°C) can improve granulation capacity and feed quality.

 2.Granulation: Steam and pressure are key factors in the granulation process.Steam increases the feed temperature and matures nutrients; pressure determines the particle size.Proper granulation technology can improve the energy value and nutrient digestion and utilization rate of feed.

 3.Puffing: Puffing makes the feed form a ”popcorn" state, improving the physical structure of the feed and the molecular structure of the internal organic matter.Puffing increases the palatability of feed, improves digestibility, and helps to kill microorganisms and ensure the biological safety of feed.

 4.High temperature treatment: High temperature treatment can destroy anti-nutrient factors, such as trypsin inhibitors, and improve the digestive utilization rate of proteins and minerals.However, excessive heating may cause the amino acids of the protein to undergo a Maillard reaction, reducing the utilization rate.

 In summary, the appropriate heat treatment process can significantly improve the quality and nutritional value of feed.