Advantages of wet extruder in aquatic feed productiondog food1 (2).jpg
The difference between wet expansion and dry expansion is that the raw materials are prepared in advance before expansion, and the temperature is increased by steam or water. The so-called conditioning refers to the hot and wet effect of steam on pet food raw materials, so that the starch in the raw materials is pre gelatinized, the protein is denatured and the raw materials are softened, which is conducive to improving the expansion granulation effect and expansion quality of dog food.
Advantages of wet extruder in aquatic feed production
1.1 it can produce a wide variety of products; Improve the conversion rate of feed; Improve the stability of feed in water; Facilitate the control of feed density; The finished feed has good mechanical properties; The lowest cost formula can be used to reduce the feed production cost; Feed is more hygienic.
1.2 it can produce a wide range of products. For aquatic feed, it can process feed such as shrimp, crab, eel, catfish, carp, frogs, etc. it can also produce full-fat soybean, cat and dog feed, pet feed, ornamental animal feed and other characteristic feeds.
Raw material processing and ripening
2.1 improve the feed conversion rate. The gelatinization degree of starch in the feed can reach 80-99% due to the processing of high temperature transient (HTST), which is more conducive to the digestion and absorption of feed by animals, especially aquatic animals (because their intestines are short and fine).
2.2 improving the stability of feed in water is an important index for aquatic feed, especially for slow food animals, such as shrimp, crab, etc. Because the stability in the water is not good, the feed is decomposed in the water before the aquatic animals have time to eat, which not only wastes the feed, but also pollutes the water quality, which is not conducive to environmental protection and the sustainable development of aquaculture, while the stability of expanded feed in the water is up to; 12 hours, up to more than 24 hours, which is enough time to wait for animals to feed, while the stability of shrimp feed in water is required to be 4 hours on average.
Feed density and water protection
3.1 it is convenient to control the feed density. It can produce floating feed, sinking feed and slow sinking feed (the process parameters in slow sinking feed processing are difficult to control), which is more conducive to the feed demand of animals in different water layers. Using floating feed, it can enable farmers to observe the feeding situation of fish, so as to adjust feed feeding and save feed.
3.2 the expanded feed has good mechanical properties and is not easy to break, because any crushing and decomposition of the finished feed before use will produce dust, which not only increases the waste of feed, but also pollutes the water quality and air.
Feed safety
4.1 feed hygiene materials are processed by high temperature transient (HTST), which is equivalent to pasteurization process. All harmful bacteria in the feed are killed, thus reducing the impact of feed on aquatic animals and the pollution of harmful bacteria to water quality.
In recent years, the wet extruder developed for aquatic feed has gradually developed into a machine that can produce feed of various specifications. Due to different design formulas, it can be produced on the same equipment with only a few changes. Due to its wide use, wet expansion equipment has become a competitive tool for the production of aquatic feed. With the application of computer technology in the control of wet expansion machine, the control of wet expansion machine will be easier and easier, which will greatly approach the application of wet expansion machine in aquatic feed production.
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