Essential Ingredients for Extruded Fish Feed Pellets

Nutritional fortification additives: Precisely supplementing nutritional deficiencies. Vitamin additives should prioritize stable compound vitamins (0.1%-0.3%). Single vitamins (such as vitamins C and E) can lose 40%-60% at temperatures above 120℃ in the extruder. Compound vitamins, after coating treatment, can increase retention to over 70%. Mineral additives (such as calcium, phosphorus, and zinc, 1%-2%) should be water-soluble to avoid sedimentation during extrusion in the dog food maker machine, which can wear down the screw and die, while ensuring efficient absorption by fish. These additives must be evenly mixed in during the raw material mixing stage. Excessive addition can reduce feed palatability and may react with metal parts inside the extruder, shortening equipment lifespan.

Painfulness and stability additives: Optimizing pellet quality. Oil additives (such as fish oil and soybean oil, 3%-5%) improve feed palatability and form a protective film after extrusion, enhancing pellet water resistance. A "post-addition" process is required, where oil is sprayed after the pet food extruder machine has cooled and discharged the material to prevent oxidation and deterioration at high temperatures. Pre-mixing the raw materials will reduce material friction, leading to uneven feeding and insufficient extrusion. Binders (such as sodium carboxymethyl cellulose, 0.5%-1%) can enhance pellet compactness and reduce breakage, especially suitable for sinking feeds; however, the amount added must be strictly controlled. Excessive amounts will increase extruder pressure, causing die blockage and affecting fish digestion. Probiotic additives (0.05%-0.1%) must be added after extrusion and cooling, as the high temperature of the extruder will completely destroy their activity. Using a low-temperature wet extruder (80-100℃) can improve probiotic retention.

Synergistic regulation of additives and extruder. When adding heat-sensitive additives (vitamins, probiotics), the temperature of the Dog Food Extruder machine must be lowered to 80-100℃, or a combination of "low-temperature puffing + post-addition" process should be used. When adding minerals or binders, the extruder speed should be increased (350-400 r/min) to ensure thorough mixing of the materials and avoid excessively high local concentrations. At the same time, the extruder die and screw should be cleaned regularly to remove residues, as additives can easily accumulate and clump inside the equipment, causing blockages and affecting production continuity.

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