Vitamin-rich aquatic fry feed: Ensuring the nutritional needs of fry. Aquatic fry (such as shrimp fry and fish fry) have extremely high vitamin requirements. Vitamins participate in the growth, development, and immune regulation of fry, and are heat-sensitive components, resulting in significant loss during prolonged high-temperature heating. Therefore, vitamin-rich aquatic fry feed must be produced using dry fish feed production equipment.
The "high-temperature, short-time" heating characteristic of dry extruders allows for a vitamin retention rate of over 85%, while wet extruders only achieve a retention rate of 70%-75%. For example, when producing starter feed for shrimp fry, adding heat-sensitive components such as vitamin C and vitamin E, using a dry-type fish feed pellet processing machine, results in a vitamin C retention rate of 88%, effectively improving the survival rate and stress resistance of shrimp fry; if a wet extruder is used, the vitamin C retention rate is only 72%, failing to meet the nutritional needs of shrimp fry.
Probiotic-containing livestock and poultry feed: Ensuring the activity of probiotics. Probiotics (such as Bacillus and Lactobacillus) are important functional components in livestock and poultry feed, regulating intestinal flora balance and enhancing immunity. However, probiotics are sensitive to temperature and are easily inactivated above 120℃. Therefore, dry-type fish feed making machines are suitable for livestock and poultry feed containing probiotics.
Dry extruders can control the raw material temperature at 120-130℃ by adjusting the screw speed and feed rate, while shortening the high-temperature residence time, thus achieving a probiotic survival rate of over 70%. For example, when producing piglet nursery feed, adding Bacillus probiotics and using a dry extruder results in a 75% probiotic survival rate, effectively improving piglet intestinal health and reducing diarrhea rates. If a wet extruder is used, the raw material temperature reaches 140-180℃, resulting in a probiotic survival rate of less than 50%, significantly reducing functionality.
High-end pet food containing amino acids: retains nutritional activity. High-end pet foods (such as puppy and senior pet foods) typically contain high levels of amino acids (such as lysine and methionine). Amino acids are heat-sensitive; high-temperature heating can cause oxidation and decomposition, reducing their nutritional activity. Therefore, high-end pet foods containing amino acids are best processed using a dry-type floating fish feed pellet making machine. The rapid heating and discharge characteristics of dry extruders reduce the oxidation and decomposition of amino acids, achieving a retention rate of over 80%. For example, when producing kitten food, essential amino acids such as lysine and methionine are added. Using a dry extruder results in an 82% amino acid retention rate, meeting the nutritional needs of rapidly growing kittens. If a wet extruder is used, the amino acid retention rate is only 65%-70%, leading to insufficient nutrient intake in kittens and affecting their growth and development.
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