The core difference in nutrient conversion efficiency lies in starch gelatinization and protein denaturation. Traditional powdered feed has a starch gelatinization rate of only about 30%, and the protein is not denatured. After fish consume it, a large amount of nutrients cannot be broken down and absorbed by the digestive system, resulting in feed waste and water pollution from undigested nutrients. In contrast, the twin-screw extruder in wet dog food production machines creates a high-temperature environment of 120-160℃ and a high-pressure environment of 3-6MPa during production, increasing the starch gelatinization rate in the raw materials to over 80%. This restructures the starch molecules, making them easier for fish to absorb. Simultaneously, the high temperature denatures proteins, breaking down anti-nutritional factors (such as trypsin inhibitors) and making amino acids more readily absorbed and utilized. For example, when carp consume extruded pellet feed, the digestibility and absorption rate of crude protein can reach over 85%, while the rate is only about 60% when consuming traditional powdered feed, representing a more than 40% increase in nutrient absorption efficiency.
Differences also exist in the uniformity and stability of nutrient composition. Traditional feeds are mostly manually mixed, resulting in uneven mixing of raw materials and nutrient imbalances in fish during feeding, leading to poor growth uniformity and significant individual differences. Furthermore, powdered feeds are prone to stratification during transportation and storage, causing nutrient loss. Wet dog food processing machines, through forced conveying and thorough mixing with a screw conveyor, uniformly combine raw materials such as fishmeal, corn, and premixes. After pressing or extrusion, the nutrients are firmly locked inside the pellets, resulting in greater stability. Especially with extruded pellets, high-temperature processing reduces the loss of heat-sensitive nutrients such as vitamins (loss rate controlled within 10%), while traditional feeds can have a nutrient loss rate of 20%-30%. Simultaneously, minerals and attractants can be precisely added to the pellets, ensuring balanced nutrition in each pellet and promoting uniform fish growth.
The special role of wet fish feed extruder machines in nutrient optimization. Compared to ordinary flat die and ring die pellet mills, extruders offer significant advantages in nutritional enhancement: Firstly, their high-temperature, high-pressure environment kills harmful microorganisms in the raw materials, preventing nutrients from being consumed by microorganisms and reducing the risk of fish contracting diseases from contaminated feed. Secondly, the extrusion process transforms high-fiber, difficult-to-digest raw materials (such as brewer's grains and corn germ meal) into easily absorbed nutrients, expanding the range of feed ingredients and further improving nutrient utilization. Furthermore, extruded pellets have a higher nutrient density; with the same feeding amount, fish can ingest more effective nutrients, reducing the amount of feed required and indirectly lowering aquaculture costs.
About Us
Customer visit
Certificate of Honor
Your message must be between 20-3,000 characters!
English
