The difference between single-screw and twin-screw floating fish food extruders: key to improving production efficiency

Dec 09, 2025

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The most crucial differences lie in production capacity and feed stability. Single-screw fish feed pellet extruders typically have an hourly capacity of 0.5-2 tons, and due to limitations in the feeding method, their capacity fluctuates significantly, reaching ±15%. Twin-screw floating fish feed extruders, with their forced feeding and efficient conveying, can achieve hourly capacities ranging from 1 ton to over 10 tons, with capacity fluctuations controlled within ±3%. For example, a twin-screw extruder with an hourly capacity of 3 tons, operating for 16 hours a day, can achieve a daily capacity of 48 tons, 2.5-3 times that of a single-screw extruder of the same power. This stable high capacity makes twin-screw extruders the preferred choice for large-scale production, while single-screw extruders are more suitable for small workshops or individual fish farmers.

The contrast in energy consumption and production efficiency is equally striking. Single-screw fish feed extruders suffer from low raw material plasticization efficiency, resulting in power consumption of 120-150 kWh per ton of feed produced. Twin-screw extruders, through high-intensity meshing shearing and precise temperature control, improve plasticization efficiency by 40%, reducing power consumption to 80-100 kWh per ton of feed, saving 30-50 yuan in electricity costs per ton (based on an industrial electricity price of 0.8 yuan/kWh). Regarding product qualification rates, single-screw extruders typically achieve below 85% qualification due to uneven plasticization and poor pellet formation stability; twin-screw extruders produce feed pellets with a diameter deviation ≤0.2 mm, a starch gelatinization rate exceeding 90%, and a stable qualification rate above 98%, significantly reducing raw material waste.

The difference in continuous operating capacity is also significant. Single-screw fish feed pellet making machines, due to unstable feeding and plasticizing processes, typically cannot operate continuously for more than 4 hours, requiring shutdown for cleaning raw material residue and heat dissipation. Twin-screw floating fish food extruders, with their stable operation and excellent heat dissipation system, can operate continuously for 24 hours, only requiring shutdown for mold changes or maintenance. For feed companies with large order volumes, the continuous operation capability of twin-screw extruders can significantly improve production efficiency and reduce downtime losses. A large feed mill calculated that after using twin-screw extruders, the effective working time of the equipment increased from 10 hours to 20 hours per day, doubling annual production capacity.

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MIKIM's fish feed pellet production lines and supporting machinery offer excellent value for money. Not only are they affordable, eliminating middlemen markups and allowing small and medium-sized enterprises (SMEs) and fish farmers to purchase complete sets of equipment at reasonable costs, but they also boast exceptional efficiency. The fully automated process, from raw material crushing and precise ingredient mixing to extrusion pelleting and maturation, is completed in one continuous flow. This results in high starch gelatinization rates and uniform pellet formation, significantly improving production efficiency and feed quality, truly achieving "low cost, high output." Choosing a MIKIM fish feed pellet production line means enjoying comprehensive pre-sales and after-sales service, including 24-hour online customer support, a one-year warranty on the entire machine, professional on-site installation, commissioning, and maintenance, and a stable supply of spare parts. Customers can buy with confidence and use with peace of mind, with both excellent value and service quality!

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