Fish Feed Extrusion Process Origin The early-stage extrusion processing was mainly used in food processing industry. Besides, there are some other obvious advantages of extruded aqua feed: High digestive utilization ratio: in the process of extruding, the heat, steam, pressure and other mechanical actions can promote the degree of starch pasting, break and soften the cell wall part of fiber structure and release some digestible materials, which is in favor of the digestion and absorption for aquatic livestock. Remember to check the degree of tightness elasticity of belt, avoiding capacity decrease caused by belt slipping.

Fish Feed Extrusion. What is Fish Feed Extrusion Process Commercial fish feed extrusion process refers to cook the mixture of raw materials under high temperature, moisture and high pressure by means of extruder machine within short time, whereby the high temperature is a direct result of friction(dry extrusion) or preconditioning and steam injection (wet extrusion). Slight pollution to environment: with good stability in water, extruded fish feed makes it possible to decrease the dissolution and sediment of feed nutrition and then reduce loss and waste, alleviating water pollution. With the unceasing development of technology and the continuous rising of people living standard, the growth of aquaculture must follow the principle of producing green food without pollution, bringing significant attention and lots of intensive study on aqua feed production technology. Adavantage of Extruded Fish Feed The basic function of fish pellets produced through extrusion process is to kill the germ, mycete and fungus in feed ingredients, improve the hygienic quality and provide safe fodder for fish and other aquatic animals.

Equipment - Fish Feed Extruder Currently, the main extrusion equipment applied in aquafeed production is single screw fish food extruder which is also divided into dry type and wet type fish feed extruder machine. For adding raw materials, operators should use a stick rather than use hand. Tips when operating fish food extruder: Pay more attention to safety. Since the nineteen fifties, America had started to use this technology for feed processing field, especially for processing pet food and pretreatment of ingredients.fishfeedmachinery/Solution/fish-feed-extrusion-process-feed-extruder. With different parameters and formulation, fish farmers and feed plants can make floating, sinking and slow-sinking feed with high quality and nutrition so as to adapt for diverse ingestion requirements of various aquatic animals. In addition, with longer and easier storage period, fish food via extrusion process, including floating, sinking and slow sinking types, also can satisfy different demands of aquatic animals with various ingestion habits. Wet type extrusion process: its principle is similar to that of dry type extrusion, but it

Wholesale Bimetallic Screw Barrels needs to add water and vapor to make moisture up to 20% or even over 30% because the rising of materials temperature depends on the addition of vapor. After extruding out of die hole, materials pressure will decrease sharply and moisture will evaporate so as to achieve the goal of extrusion. As a technological treatment, extrusion can make it possible to process a variety of ingredients, such as soybean, corn, rice, peas and raw materials with high water content. And there is a consensus that adopting extrusion process to make feed is the major means to ensure producing high quality and safe aquatic products for human health. According to the moisture content of raw materials treatment, the extrusion process can be divided into two types - dry type extrusion and wet type extrusion. Dry type extrusion process: in the process of extruding, it adopts the heat from friction for warming materials, forces materials to pass through die hole and gets certain pressure simultaneously under the action of screw extrusion. During this whole process, water content is always about 15% - 20%. Adopting alloy steel as material, FANWAY dry type fish feed extruder has been widely used in small-scale and medium-scale fish farm or feed plants to produce aqua feed and also dog/cat pet feed in virtue of its simple structure and low noise. Till the nineteen eighties, it has become the fastest developing technique of feed processing industry in the world, and has started to be applied in each sphere of feeding stuff industry, widely used for dry pet foods, some applications for livestock and fish fodder. The raw materials should be added before machine running. Regularly change the lubricating oil for machine. When blocking, please turn down the extruder instantly. Stay away from feed inlet when machine runs. Convenient feeding management: extruded fish feed can float on water for a long time, which makes it easier to observe fish ingestion so as to adjust feeding quantity timely and master fish growth and health state. All in all, extruded aquafeed has gained great popularity among fish farms and other aquaculture industry around the world. Other than dry type, the wet type fish feed extruder machine is equipped with a boiler that can add vapor constantly into chamber when extruding feed ingredients, which makes it widely applied to produce floating fish pellets for fish farm, aquaculture and even poultry farms