Various floating fish feeds and bait feeds produced by extruded equipment are very popular in the market

    The processing of puffed bait is a new feed processing technology. The puffing of the feed in the extrusion chamber of the puffing equipment is actually a high-temperature instantaneous process: the mixture is at high temperature (110-200 ℃), high pressure (25-l00kg/cm2), And in the environment of high shear force and high moisture (10%-20% or even 30%), a kind of bulky porous is formed after continuous mixing, tempering, heating, and pressurization, maturation, extrusion die hole and sudden pressure reduction Feed.

Advantages of extruded feed:

1 Improve the utilization rate of feed

The heat, humidity, pressure and various mechanical effects during the expansion process break the 1,4-glycosidic bond in the starch molecule to produce low molecular weight products such as glucose, maltose, maltotriose and maltodextrin. The expansion process can make starch paste When the degree of chemistry is increased, the cell wall of the fiber structure is destroyed and softened, and part of the enclosed and bound digestible substances are released. At the same time, the fat penetrates from the inside of the particles to the surface, which makes the feed have a special fragrance, improves the palatability, and thus the food intake rate. improve. In addition, the protein in the vegetable protein feed can inactivate certain protease inhibitors such as antitrypsin and urease after moderate heat treatment, and destroy the hydrogen bonds and other secondary bonds in the protein, causing the original polypeptide chain The spatial conformation changes, resulting in protein denaturation, the denatured protein molecules become fibrous, the peptide chain stretches loosely, the molecular surface area increases, the flow is blocked, and the contact with the enzymes in the animal body is increased, which is conducive to the digestion and absorption of aquatic animals. Improve the digestibility and utilization rate of nutrients by 10%-35%.

   2 Reduce environmental pollution

The extruded floating fish feed has good stability in water. The feed pellets processed by extrusion and expansion rely on starch gelatinization and protein organization inside the feed to make the product have a certain degree of adhesion or binding force. Its stability is generally more than 12h, and the longest can reach 36h, so it can Reduce the dissolution and precipitation loss of feed nutrients in the water. Data shows that the general use of extruded floating fish feed can save 5-10% compared to powder or pellet feed, and can avoid feed residues in the water and reduce water pollution.

3 Reduce the occurrence of diseases

Feed ingredients often contain harmful microorganisms, such as aerobic organisms, neutrophils, Escherichia coli, molds, salmonella, etc. The content of animal feed ingredients is relatively high. The high temperature, high humidity, and high pressure of puffing can kill most harmful microorganisms. According to data, the number of Escherichia coli per gram of raw material is up to 10,000, and there are only less than 10 remaining after expansion. Salmonella can basically be killed after being expanded at a high temperature above 85 ℃, which helps to maintain water quality and reduce Unfavorable environmental factors in aquaculture, while reducing the mortality of aquatic animals.

4Improve breeding density

Under artificial breeding conditions, the increase in breeding density means the higher the rate of return for farmers. When the aquaculture density per unit of water body increases, the space for fish in the aquaculture water body is reduced, and the requirements for water quality will be much higher than the level of the natural environment. Because the use of extruded compound feed can reduce the feed coefficient and greatly reduce the residual bait and excrement discharged into the water body, it is possible to greatly increase the breeding density.

5 Extend the storage period of feed

Extrusion processing can improve the stability of raw materials by reducing the bacterial content and oxidation. When the extruded product is dried and cooled, the feed water activity (AW) has been reduced to 0.6 or even 0.4, which is equivalent to a moisture content of 8% to 10%, which better improves the storage stability of the feed.

6 Convenient feeding management

Aquatic extruded feed can be suspended on the water surface (water) for a long time, and there is no need to set up a feeding platform when feeding, only fixed-point feeding is enough. Fish need to float on the surface of the water when they eat, and they can directly observe the fish's eating situation, adjust the feeding amount in time, and understand the growth and health of the fish in time. Therefore, the use of aquatic extruded feed is helpful for scientific feeding management, which not only saves a lot of time, but also improves labor productivity.

7 It can meet the needs of animals with different feeding habits