Twin-Screw Floating Fish Feed Extruder Machine

 

Key Differences Between Dry Type and Wet Type fish feed pellet extruder machines

 

1.Comparison of Production Processes

 

• Dry Process:

Raw materials are directly formed via mechanical extrusion, requiring no additional water or steam; the process relies primarily on friction and pressure to generate heat. The production workflow is relatively simple, and equipment investment is low.

 

• Wet Process:

Raw materials are first treated in a conditioner (involving the addition of steam and moisture) before being extruded through an expander under conditions of high temperature and high pressure. The resulting product requires subsequent drying and cooling treatments. The production workflow is complex, and equipment investment is high.

 

2. Nutritional and Environmental Perspectives:

 

 

• Dry Type floating fish feed pellet extruder machine:

Vitamins and heat-sensitive nutrients are relatively well-preserved; however, anti-nutritional factors are not fully degraded, resulting in relatively low raw material utilization efficiency.

 

• Wet Type floating fish feed pellet processing machine:

Protein and starch digestibility are higher, and the degradation of anti-nutritional factors is more thorough; however, some heat-sensitive nutrients are lost, necessitating the additional supplementation of vitamins.

 

The choice of processing method depends primarily on factors such as the target livestock species, production scale, investment budget, and product positioning. Modern, large-scale feed enterprises typically employ the wet method, whereas small-scale livestock farmers or specific operational contexts may still utilize the dry type.

 

3. Applicable Scenarios

a. The dry type floating fish food extruder machine is suitable for:

• Small-scale aquaculture farms or feed mills
• Cost-sensitive users
• Feed for bottom-dwelling fish (sinking feed)
• Regions with limited resources

 

b. The wet Type floating fish feed pellet processing machine is suitable for:

• Large-scale feed production enterprises
• High-end aquaculture operations
• Upper- and mid-water fish (requiring floating or slow-sinking feed)
• Scenarios with stringent requirements for feed quality

 

4. Economic Comparison:

a. Advantages of the dry type floating fish food pellet extruder machine: Low equipment investment costs, lower energy consumption, high production efficiency, and simple operation and maintenance.

 

b. Advantages of the wet Type fish feed extruder machine: Higher product yield, more stable product quality, superior particle uniformity, high nutrient utilization rates, and the capability to produce floating feed.

 

Dry-Type vs Wet-Type Fish Feed Parameter Comparison
Parameter	Dry-Type Fish Feed	Wet-Type Fish Feed
Pellet Density	Relatively High	Low (Porous Structure)
Water Stability	Moderate (5–15 minutes)	Good (15–30 minutes)
Starch Gelatinization	Low (20–40%)	High (60–80%)
Digestibility	Relatively Low	High
Pellet Expansion	Low	High
Appearance & Color	Relatively Dark	Relatively Light
Nutrient Retention	Minimal loss of heat-sensitive nutrients	Partial loss of heat-sensitive nutrients