How to Choose Aquatic Fish Feed Equipment

In order to choose the production equipment of aquatic feed, 

we should first understand the many characteristics of aquatic feed:

1, Small particle size. 

Due to the short digestive tract of aquatic animals and related physiological characteristics, in order to speed up digestion and absorption, aquatic feed should be smaller than livestock feed grinding granularity. 

Such as eel, shrimp feed, its granularity should reach 80 mesh ~ 120 mesh.

2, High protein content, low carbohydrate content. 

The protein content of livestock and poultry feed is generally less than 20%, while the protein content of aquatic animal feed is mostly 30% ~ 40%, and the protein content of turtle and eel feed is as high as 65% ~ 70%.

3. The pelleted feed has tight structure, high cohesiveness and water resistance, and the stability of pelleted feed in water for more than 2 hours is required for shrimp feed.

4, Aquatic feed production, strictly prohibit cross contamination, some raw materials need to be aseptic treatment, the selected equipment is easy to clean up, less residue, especially the production of shrimp, eel feed, shall not be produced at the same time other kinds of feed, to prevent cross contamination.

To produce high quality aquatic feed, we must rely on scientific and reasonable processing technology, and combine it with advanced, reliable and stable processing machinery. In this regard, the selection of processing equipment is particularly critical.

Choice of twin-screw extruder

Feed expansion technology is mainly used in the production of special aquatic feed, pet feed and other animal feed. 

Extruded feed not only has the advantages of general full price pellet feed, but also can improve the digestion and absorption rate of feeding animals and effectively prevent digestive tract diseases. 

Expanded feed not only because of starch gelatinization can be applied to starch, fat content of high materials, but also because of high temperature, high pressure curing, disinfection, sterilization effect is more obvious, strong applicability, can be expanded feed resources more extensive. 

It is because of the expansion processing has so many advantages, more and more feed factories began to expand the processing of aquatic feed. 

The main working principle of the expanding machine is to contain a certain amount of starch (more than 20%) powder material, after tempering and tempering treatment, so that the material moisture can reach 25% ~ 27%, the temperature increased to 80℃ ~ 100℃. 

The extruder is composed of feeding system, transmission system, extrusion system, discharging mold and electrical control system. 

The material with good quality enters the screw extrusion area. 

As the volume of the extrusion area becomes smaller along the axis, the pressure on the material gradually increases, and the compression ratio can reach 4 ~ 10. 

Material is pushed by screw extrusion, accompanied by strong shear and friction, pressure and temperature rise sharply, material under the action of high temperature, high pressure, starch can basically complete gelatinization, protein partial deformation. 

When the material is great pressure extrusion die, due to the sudden leave the body into the atmosphere, temperature and pressure, under the joint action of pressure difference, temperature difference, the feed volume rapidly expand, flash material, namely the moisture to evaporate quickly, dehydration and solidification, and then through the custom discharge model to need of various shapes and structure, is made from expanded pellet feed.

(1-1.5tons/h fish feed extruder)

(1.5-2tons/h fish feed extruder)

_(2-3tons/h fish feed extruder)