How to Produce Fish Feed Pellets with a dry pet food making machine？

Techniques for making floating fish feed pellets. Suitable for mid-to-upper-level fish such as bass and tilapia, the core principle is to create a stable porous structure using a dog food maker machine. The formula increases the starch content to 35%-50%, using high-quality starch raw materials such as corn flour and wheat flour, with fishmeal and soybean meal as the main protein raw materials. The extruder parameters are adjusted to: temperature 130-160℃, pressure 4-6MPa, twin-screw speed 350-400r/min, ensuring sufficient expansion of water vapor during extrusion, uniform pellet porosity, buoyancy ≥95%, and water resistance for 8-12 hours. After extrusion, the drying temperature is controlled at 80-90℃, and after cooling, oil spraying forms a protective film on the pellet surface, further enhancing water resistance and palatability.

Techniques for making sinking fish feed pellets. Suitable for bottom-dwelling fish such as grass carp and common carp, the core principle is to reduce the degree of extrusion and control pellet density. The formula reduces the starch content to 25%-35%, and appropriately increases the protein raw material ratio to 30%-40%. The parameters for the dog food extruder machine are adjusted as follows: temperature 120-140℃, pressure 3-4MPa, and speed 300-350r/min. This shortens the residence time of the raw material in the extrusion chamber, reduces porosity formation, and achieves a pellet density of 1.1-1.3g/cm³, allowing it to sink quickly to the bottom. Post-processing avoids excessive drying; moisture content is controlled at 12%-13% to ensure a compact pellet structure and prevent disintegration in water.

Techniques for producing functional fish feed pellets. For juvenile fish and fish with sensitive digestive systems, both nutrient retention and palatability must be considered. A pet food extruder machine is used, with the temperature controlled at 80-100℃ to avoid damaging heat-sensitive components such as probiotics and vitamins. The formula increases the proportion of protein ingredients, reduces starch content, and adds 1%-2% binder to stabilize the pellet structure. The extruder speed is adjusted to 250-300r/min to extend the residence time of the raw material, making the pellets looser and easier to digest. After extrusion, a "post-addition" process is used to mix in probiotics and vitamins after cooling, thereby enhancing the nutritional value of the feed.

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