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Characteristics of puffed floating fish feed and its significance in aquaculture
In order to improve the utilization, digestion and absorption rate of feed, reduce the impact of feed on the water environment, and improve the efficiency of aquaculture production, our Henan Yearmega Industry company's technicians and engineers has made a lot of efforts. By optimizing the feed formula, improving the feed machinery quality, improving the processing technology, etc., good economic and social benefits have been obtained. The use of puffing and extruding method to produce fish feed is an important research result in feed processing. Today's twin-screw extruders produce floating feed, slow-sinking or semi floating and sinking feed based on the needs of aquaculture production. Among them, the puffed floating fish feed has been widely promoted and applied due to its special function that the sinking feed doesn’t have.
1. Floating fish feed can float on the surface of water for a long time, which is convenient for feeding and management, and also save labor. Since the puffed floating fish feed can float on the surface for a long time, it can observe the feeding condition of the fish well after feeding, and it is convenient to adjust the feeding amount according to the feeding condition; at the same time, people can accurately know the growth and health of fish by feeding amount and the condition of fish feeding on the surface of the water. The farmer can calculate the amount of feed that can be fed according to the variety, specification, quantity, water temperature and feed rate of the fish, and feed quickly, which saves a lot of time and can improve labor productivity.
2. Floating fish feed is conducive to improving feed utilization. Due to the high temperature and high pressure processing conditions, the starch in the feed is matured, the fat is more conducive to digestion and absorption, and the fiber structure and cell wall are destroyed and softened, and the harmful substances such as gossypol in cottonseed meal and antitrypsin in soybean are destroyed, thereby improving the palatability and digestion and absorption rate of the feed. In addition, due to physical and chemical changes in the extruding process, the puffed feed generally produces less than 1% of the powder, which directly improves the effective use of the feed. Under normal circumstances, fish cultured with puffed floating feed can save 5-10% of feed compared with powder/flour feed or other pellet feed.
3. The use of puffed floating fish feed can reduce the pollution of water quality. The floating fish feed will not dissolve in the water for a long time, and the high-quality floating fish feed can float for about 12 hours, even 24 hours and it is easy to observe and control the feeding, reduce or avoid the powder, the remaining residual bait, etc. to pollute the water in pond, and It is extremely beneficial to environmental protection and to the growth of fish.
Yearmega company has the following different types of extruders:
2. Wet type extruder, three different types, the output range is 200kg/h to 10 tons per hour. Wet type extruder is equipped with steam conditioner which will work with steam boiler. Since the steam condition can sterilize and mature the raw materials, the wet type extruder is more efficient, and results have higher quality floating fish feed. Here is the main advantages of steam condition:
Make the feed more easy to pelletize, reduce the pulverization rate of granulation; increase the gelatinization degree of starch, increase the stability feed in water, increase the digestion and absorption rate of feed, and increase the absorption rate of protein and starch and other nutritions, destroying and killing harmful factors in material, sterilize the material; reducing power consumption, improving the capacity. Well, wet type extruder requires users to purchase additional steam boiler.
Yearmega Company have different types of wet type extruders:
1). Economical single-screw wet type extruder DSP Series, suitable for small feed mills, capacity range 200kg/h to 3 tons per hour.
2). Advanced single-screw wet type extruder SJPS Series, suitable for medium-sized feed mills, capacity range 1 tons/hour to 5 tons per hour.
3). Twin-screw wet type extruder SPHS Series, suitable for large feed mills, capacity range 1 ton to 10 tons per hour.
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