Introduction of Fish Feed Machine
Floating fish feed extruder, alse known as fish feed pellet machine, is widely used to produce all kinds of raw materials into high-grade aquatic feed pellets, for fish, catfish, shrimp, crab, etc.
The final feed pellet has a unique shape and good taste, high nutrition and smooth texture. For fish and shrimp feed, in the extrusion of particles, you can adjust the degree of extrusion to adjust the floating time on the water surface. At present, floating fish feed extruder has become the ideal choice for small and medium-sized fish farms or fish feed processing plants.
We Also Have Diesel Engine Type Fish Feed Machine for Sale
Parameter of Floating Fish Feed Machine
|Model||Capacity (kg/h)||Main power (kw)||Feeder power (kw)||Screw Diameter (mm)||Cutter power (kw)||Machine size (mm)||Weight (kg)|
Features of Dry Type Fish Feed Machine
- The fish food produced by the granulator is puffed, which is easier for fish to digest.
- Fish feed pellet size can be from 0.9 to 10 mm to feed different sizes of fish.
- Extruded fish feed particles can float on the water for more than 12 hours without dissolving.
- The high temperature and pressure process kills salmonellosis and bacterial infections, and also makes the particles easy to digest.
Working Principle Of Floating Fish Feed Machine
Extrusion is defined as a process in which a material is shaped and explodes and vaporizes by feeding through a mold under one or more process conditions, such as stirring, heating, and shearing. In other words, extrusion combines several processes: mixing, curing, kneading, shearing, and shaping.
In today’s feed and food industry, a fishball extruder is a pelletizer that continuously processes products with helical features (i.e., rotating screws with blades that are mounted very closely in a cylinder to deliver fluid). Extruded fish feeders can be designed to include a variety of operations such as mixing, homogenizing and curing, cooling, vacuuming, shaping and cutting.
With the wide application and continuous development of extrusion technology, the types of fish feed floating pelleting machines are increasing, and their classification methods are also diverse. According to the strength of shear force, can be divided into high shear force, medium shear force, low shear force extruder; According to the heating method, it can be divided into self-heating and external heating or called dry fish feed extruder and wet fish feed extruder.
Difference Between Dry and Wet Fish Feed Extruder
Fish feed making machine can be divided into dry and wet fish feed extruder according to the moisture of raw materials.
1. Dry Type
The floating fish feed extruder uses friction to heat the material and extrudes it from the holes in the mold under the action of a screw extruder. When it comes out of the machine, the pressure and temperature of the particles drop dramatically, and the water evaporates. The material is then expanded to form particles with a porous structure. In this process, the moisture range is 15 to 20 percent.
2. Wet Type
The wet method works similarly to the dry method. But the former requires adding water or steam to the machine to raise the moisture to 20 percent, or more than 30 percent in the process. It raises the temperature of the material by cooking.
Ingredients for Making Fish Feed
Processed feed can be formulated in the correct proportions to have all the necessary nutrients. The ingredients of processed fish feed usually include the following.
Protein requirements are different for different fish species. For most types of fish feed, protein will be the most expensive ingredient.
The source of protein is usually fish meal, produced by other fish. Other sources of protein include legumes such as soy.
Lipids, or fats, usually comprise about 10-15% of feed. For herbivorous fish, the typical range is 3-5%. It’s a high energy ingredient. It provides about twice as much energy as protein and carbohydrates.
The source of lipids is usually fish oil. The oil is made from other fish, such as sardines. Alternatives to fish oil include vegetable oils from rapeseed and sunflowers.
Carbohydrates are a relatively economical source of energy for fish. It helps reduce feed costs. It can be used as a binder in the manufacture of feed, especially for feed designed to float. Carbohydrates make up 20-30% of many commercial feeds.
Although carbohydrates in fish feed are economical, some fish do not tolerate large amounts of carbohydrates. Not all fish have the same amount of enzymes used to digest carbohydrates. If the carbohydrate concentration is too high, the fish will show signs of poor health. For example, some fish are known to have excess fat in their livers. In general, single-carb or D-carb use is better than multi-carb use. If starch is cooked during manufacturing, it can make fish more biologically available.
Vitamins are organic compounds that are necessary for the growth and health of fish. Key vitamins in fish include A, B1, B2, B3, B5, B6, B12, biotin, C, choline, D3, E, folic acid, inositol and K.
Unfortunately, many vitamins do not remain stable for very long in processed diets. Oxidation degrades vitamins rapidly. For example, the vitamin C content in an open flaky food container may begin to degrade within a month.
Minerals are inorganic elements that are necessary for fish to function. Minerals are needed to maintain cells, the immune system and bones. The main minerals fish need are calcium and phosphorus. Small amounts of sodium, magnesium, iron, iodine, chlorine, copper, potassium, sulfur and zinc are also required.
Fortunately, minerals have a longer shelf life than vitamins.
Attractants are usually added to fish feed to make it more palatable. This may include about 5% of feed.
Common sources of attractors are hydrolysates and concentrated fish solutions.
These ingredients can be added in different proportions to meet the requirements of different fish species. Fish at different stages of growth will also need different proportions of ingredients. In general, carnivorous fish, juveniles and fry will require higher protein content.