Advantages of floating fish feed
Easy to feed and manage. The fish feed can float on the surface or in water for a long time, and there is no need to set up a feeding platform when feeding the fish, just in a fixed spot to feed the fish. At the same time, fish need to swim to the surface of the water when eating, so that fish farmers can observe the feeding situation of fish, adjust the feeding amount in time, and master the growth and health status of fish in the first time. Simply put, floating fish feed is conducive to scientific rearing and management, saving a lot of time and increasing labor productivity.
Reduce feed waste: FLOATING FISH feed has good water stability, can float in the water for a long time for several hours, thereby avoiding the dissolution of nutrients in the feed and feed mud, to a great extent reduce feed waste. It has been tested that the use of floating fish feed can save about 10% of feed compared to the use of powered or hard pellet feed.
Reduce water pollution. Floating fish feed is insoluble in water, which avoids the residual fermentation of feed in water and reduces the oxygen consumption of organic matter in water, thus effectively reducing water pollution.
Strong palatability, easy to absorb. After high temperature and high pressure extrusion, all kinds of microorganisms, eggs and pathogenic bacteria are killed, improve the quality of planktonic fish feed, reduce fish digestive tract diseases. In addition, the palatability of planktonic fish feed after high temperature extrusion, more conducive to fish absorption and utilization.
Floating fish feed manufacturing process
The raw material is first crushed by a fish feed grinder. Particle size directly affects the efficiency of granulation. Once sent to the crushing chamber, the material is crushed under the high speed rotation of the hammer. Under high pressure and fast-moving air currents, the crushed raw material is further reduced to particle size or very small fragments for further processing. Therefore, the fish feed hammer crusher is suitable for the grinding of fish feed particles on the production line.
The powdered feed material needs to be thoroughly mixed in a mixer to ensure the quality of the nutritious feed. We offer single shaft and double belt feed mixers. It enhances convection, shear and mixing effects and is an important part of the entire production line.
After mixing, the feed pellet extruder compresses the feed powder into pellets of moderate size. Dry fish feed extruder is an important equipment with reliable performance, simple operation and low price. It is economical for small and medium scale production. Therefore, dry feed pelleting machine is recommended in feed pelleting plant.
Pelleting machines produce fish feed pellets that need to reduce high moisture and temperature. Therefore, the net belt dryer should be equipped on the production line. It is simple in structure, easy to install and maintain, is the ideal equipment for fish feed pellet drying.
5. Oil Spraying Process
For a better smell and taste, a spray machine can be used to spray oil onto the surface of fish feed pellets coming out of the dryer. It sprays aerosolized oil at high speed on the top and bottom surfaces of the particles, and excess oil can be recycled through a filter.
6. Pellet Cooling
Heat particles are soft and easily broken, which may result in a high proportion of fine powder. By cooling, the pellet can harden. Countercurrent cooler is a popular cooling type used in pellet industry at present. The direction of air and pellet products is opposite.
Fish feed pellets are packed in bags for further transport and storage. Here, you can choose a pellet packing machine, which is suitable for weighing and bagging particles. The use of packaging machine can improve productivity, reduce labor intensity, meet the needs of mass production, and meet the health requirements.
Raw Materials for Fish Feed
Like other animals, fish need protein, carbohydrates, lipids, minerals and vitamins to maintain healthy growth. The main ingredients of fish feed contain protein, fat and minerals. The raw materials of these ingredients mainly include straw powder, bean cake, peanut cake, corn gluten powder, rice bran, wheat bran and so on. Specifically, depending on the nutritional requirements of the fish, here are some potential local resources that could be used to make fish feed.
Protein raw materials: fish meal (crude protein 62%-66%), blood meal, silkworm pupa meal, shrimp meal, soybean meal (crude protein 45%), cottonseed meal (crude protein 32%-42%), rapeseed meal (crude protein 33%-40%), peanut meal, sesame meal and corn flour, etc. In addition, earthworms, maggots and insects are also good animal protein feeds for fish.
Energy source of raw materials: wheat, wheat gluten, whole rice bran, corn and other grains. In these raw materials, corn carbohydrate content is high, not easy to be absorbed by fish and shrimp, so under normal circumstances, the production of aquatic feed when the content of corn is low; As a starch, wheat is soft in texture, but wheat has excellent extensibility and elasticity, and is a natural adhesive, which can promote the water stability of fish feed floating in water for a long time. The fat content of whole rice bran is high, as raw material to add about 6%, can make it easy to granulation, save power consumption, but remember to pay attention to the problem of oxidative rancor. Moderate addition of fat content can promote the digestibility of feed, improve the utilization rate of protein, so as to achieve the effect of saving feed protein.
Minerals (such as calcium, phosphorus, iron, zinc, iodine, etc.) are important components of fish feed and play a pivotal role in fish growth and nutrition. Common mineral ingredients are fish meal, shell meal, eggshell meal, calcium phosphate and bone meal.