회사 소식 Advantages and disadvantages of wet dog food processing machines

Core Advantages: Nutrient Retention, Controllable Costs, and Easy Operation. The most prominent advantage of the wet fish feed extruder machine is its complete nutrient retention. The entire process is low-temperature processing (drying stage ≤80℃), achieving a retention rate of over 85% for heat-sensitive components (vitamins, enzymes, probiotics), far exceeding that of extruders (70%-75%). This makes it suitable for producing feed for young animals and specialty livestock. Equipment investment and energy consumption are low; flat die extruders require only 1/3 to 1/2 the investment of extruders with the same capacity, while ring die extruders consume over 30% less energy than twin-screw extruders, making them suitable for small and medium-sized feed mills to control costs. Operation is simple and maintenance is convenient, with minimal parameter adjustments (only binder, moisture, and pressure need to be controlled), resulting in a low failure rate. Core components (dies, pressure rollers) have a long service life, and maintenance costs are far lower than extruders. Furthermore, the particle hardness and size are highly controllable, adapting to the feeding needs of different farmed animals.

Main Disadvantages: Limited production capacity and product types. The wet floating fish feed machine has limited capacity expansion potential. Large ring die extruders have a maximum output of approximately 2000 kg per hour, lower than large twin-screw extruders (which can reach 5000 kg per hour), making it difficult to meet the needs of ultra-large-scale feed production. Its product type is limited, only producing sinking hard pellets, unable to produce floating or semi-floating feeds, thus restricting its suitability for a wide range of fish species. In contrast, extruders can flexibly adjust the buoyancy of their products, covering fish species in all water layers. Furthermore, the pellets have moderate water resistance (4-6 hours), lower than the 8-12 hours of extruders, which can easily lead to water pollution in high-density aquaculture, requiring the use of water purification equipment.

Complementary usage model with extruders: covering all scenarios. Combining these two technologies allows for complementary advantages, with two common models: First, a segmented processing model. A wet fish feed pellet processing machine produces basic hard pellets, retaining core nutrients, which are then fed into an extruder for secondary extrusion. This ensures nutritional integrity while imparting buoyancy and high water resistance, making it suitable for high-end specialty aquatic feeds. Second, a scenario-specific model. Feed mills are equipped with both wet pellet mills and extruders. The wet pellet mill produces livestock and poultry feed, young animal feed, and sinking aquatic feed, while the extruder produces floating feed for mid-to-upper-level fish and functional extruded feed, covering the needs of different aquaculture scenarios. This complementary model balances nutrition, cost, and product type, maximizing the feed mill's product competitiveness and is currently the mainstream configuration for medium to large-sized feed mills.

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