The utility model relates to a puffed and extruded fish feed, which is a fluffy and porous feed which is extruded through a fish feed machine.
Extruded feed is a kind of processing technology to decompress the material after high temperature and high pressure treatment, using the instantaneous evaporation of water or the material itself extruded to change some of the physical and chemical property of the material. It is divided into air expansion and extrusion expansion. After the expansion of feed with fish feed machine, the long chain structure of starch, protein and fat changed to short chain structure, and the very soft fiber structure and cell wall were destroyed. Mustard mildew in rapeseed meal, cotton mildew in cottonseed meal, and trypsin-resistant growth factors in soybean meal are easy to digest. At the same time, it overcomes the disadvantages of poor stability of water quality, fast settling speed, easy loss and waste of feed and so on. The expansion effect is affected by the ratio of raw materials, starch content, water content and expansion temperature. Combined with expansion characteristics, to ensure that the raw material in the raw material formula of starch in more than 20% , the use of high-temperature additives.
The extruded fish feed can float on the water surface for a long time and is not easy to disperse. It is convenient for feeding and management, and is beneficial to saving labor cost. Puffed feed can produce generally less than 1% of the powder, high-quality floating fish feed floating time can generally reach about 2 hours. In general, compared with powder or other pellets, it can save nearly 10% feed, and is easy to observe and control, reducing the pollution of powder bait and residual bait to water body. The output of fish feed machine is stable
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