What are the advantages of extruder in processing high-protein and high-fat feed?
Publish Time: 2025-07-23
With the rapid development of aquaculture and pet food industries, the market demand for high-protein and high-fat feed is growing. This type of feed not only has high nutritional value, but also has a significant impact on the growth rate and health of animals. However, high-protein and high-fat formulas often face a series of technical difficulties during processing, such as high viscosity, poor fluidity, easy clogging, and strong heat sensitivity. The extruder, with its unique structural design and process advantages, has become an ideal equipment to solve these problems, especially in the processing of high-nutrition formula feeds such as California bass feed and grouper feed.
1. Uniform mixing to improve formula stability
High-protein and high-fat feeds are usually composed of a variety of raw materials, including fish meal, soybean meal, oil, vitamins, etc. The physical properties of these ingredients are very different and difficult to mix. The extruder achieves efficient and uniform mixing in a closed cavity through two intermeshing screws. Compared with single-screw equipment, the twin-screw system has significant advantages in material transportation, shear mixing, temperature control and regulation. It can ensure that high-protein and high-fat raw materials are fully integrated before entering the extrusion chamber, avoiding local excessive concentration or component separation, thereby improving the stability and consistency of the feed formula.
2. Accurate temperature control to protect nutrients
High-protein and high-fat raw materials are highly sensitive to heat. Excessive processing temperature can easily lead to protein denaturation and oil oxidation, reducing the nutritional value and palatability of the feed. The extruder adopts zoned temperature control technology, which can accurately adjust each heating zone according to process requirements to ensure that the material is in the optimal temperature range during the extrusion process. At the same time, the shearing effect of the twin-screw structure is controllable, which can effectively reduce the residence time of the material at high temperature, thereby retaining the nutrients in the feed to the greatest extent and improving the quality of the final product.
3. Strong shear force and self-cleaning ability to prevent blockage
High-fat feed is prone to problems such as material wall sticking and blockage during processing, affecting equipment operation efficiency and product quality. The extruder has strong shear force and self-cleaning ability. The two screws scrape against each other during rotation, which can effectively prevent the material from accumulating or agglomerating in the cavity and reduce the risk of blockage. In addition, its forced conveying capacity is also better than that of the single-screw model, and it can stably push high-viscosity and high-fat materials to the die head to ensure the smooth progress of the continuous production process.
4. Adapt to a variety of particle specifications and meet diverse needs
The extruder is not only suitable for high-protein and high-fat formulas, but also can flexibly adjust the size and shape of the output particles. For example, for 0.4mm fine-particle California bass feed, the equipment can achieve precise control by replacing the die head and adjusting the screw speed; and for large-size grouper feed, the integrity and density of the particles can also be guaranteed by optimizing the process parameters. This high adaptability enables the twin-screw extruder to meet the feed needs of different aquaculture objects and enhance the market competitiveness of the product.
5. Improve the digestibility and palatability of feed
The extrusion process can not only improve the physical structure of the feed, but also improve its digestibility and absorption rate. The extruder uses high temperature and high pressure for a short time to fully gelatinize starch and change the protein structure, thereby improving the digestibility of the feed. At the same time, the surface of the puffed particles is smooth and the structure is loose, which helps to enhance the water absorption and palatability of the feed, especially for fish and pet animals that are sensitive to taste. This feature is particularly important for high-protein and high-fat feeds, which helps to improve the animal's feeding enthusiasm and growth efficiency.
6. Energy saving and environmental protection, improve production efficiency
Most modern extruders are equipped with automatic control systems, which can monitor parameters such as temperature, pressure, and current in real time, and automatically adjust the operating status according to load changes, thereby achieving energy saving and consumption reduction. At the same time, due to its efficient mixing and conveying capabilities, the amount of material that can be processed per unit time is larger, which greatly improves production efficiency. For large-scale feed production companies, this equipment not only reduces energy consumption costs, but also improves the overall operating efficiency of the production line.
With its multiple advantages such as uniform mixing, precise temperature control, strong shear force, self-cleaning ability, adjustable particles, improved digestion and absorption rate, and energy saving and environmental protection, the extruder has become an ideal solution for high-protein and high-fat feed processing. Whether producing California bass feed, grouper feed, pet food or high-end human food, this equipment can provide stable, efficient and high-quality processing guarantees.
