Slow sinking type puffing aquatic product matched pellet feed, application, producing method and equipment thereof

Abstract

The invention discloses a slow sinking type puffing aquatic product matched pellet feed. The pellet feed contains 9-15% of carbohydrate and 8-22% of grease. The puffing degree of the pellet feed is 1.1-1.25, and the volume mass is 380-420kg/m<3>. The pellet feed is a special feed with low sugar and high grease for artificial carnivorous fish culture. The invention also provides producing equipment and method of the pellet feed. The producing equipment comprises a crusher, a mixer, a quality controlling machine, a dual-screw puffing machine, a granulating machine, a dryer and the like which are sequentially connected. A screw assembly in the dual-screw puffing machine consists of a delivering area screw, a kneading area screw and a forming area screw. The invention can obviously enhance the quality of the fish, greatly reduce the generation of fatty liver in the fishes, and ensure the uniform size of the finished fishes.

Description

technical field [0001] The invention belongs to the technical field of fish feed, and specifically relates to a low-sugar, high-fat, slow-sinking type puffed compound pellet feed manufacturing process and manufacturing equipment used to meet the needs of carnivorous fish breeding. Background technique [0002] my country's aquaculture industry occupies a very important position in the national economy and people's livelihood. The Chinese not only use 7% of the arable land to feed 22% of the world's population, but also use the limited water area to provide the Chinese people and the international community with high-quality and low-cost aquatic protein sources. [0003] Carnivorous fish such as black carp, herring, perch, yellow catfish, turbot, large yellow croaker, etc. are high-end and famous aquatic products, which are popular with consumers and have high economic value, but at the same time, breeding is relatively difficult. Artificial breeding is generally based on fe...

AI Technical Summary

Problems solved by technology

[0005] (2) The utilization rate of chilled fresh and wild fish is low, and many of its residual bait and fish excrement have been deposited on the bottom of the pond for a long time. Every autumn and winter, the ammonia nitrogen and nitrite nitrogen in the pond are seriously exceeded, and it is easy to form breeding objects due to physical problems. fall and become infected, resulting in a large number of deaths

At the same time, due to the freshness of chilled fish, there are many germs carried, and the general conventional medicines are no longer effective.

In order to prevent the occurrence of fish diseases, the extensive use and abuse of antibiotics will reduce the quality of commercial fish and affect human health

[0006] (3) Due to the defect of the digestive system of the fish body itself, the chilled fish cannot be completely digested in the digestive tract and is excreted from the body, which seriously pollutes the water environment and causes serious eutrophication of the aquaculture water body. Aquaculture has become the most direct source of pollution in major rivers and lakes

After the incident, cage farming in Taihu Lake had to be banned, and pond farming in the waters around Taihu Lake was not supported

[0007] (4) Due to the serious pollution of the coastal waters, the heavy metals in many chilled fish seriously exceed the standard, and accumulate in the body of farmed fish, which seriously affects human health

[0010] Second, the digestion and utilization of carbohydrates (sugar) by carnivorous fish is low, and long-term accumulation is prone to fatty liver, so the content of sugar in the feed formula should be strictly controlled

At the above tempering and extruding temperature, it is easy to cause some components in the material to lose their activity

Once the content of carbohydrates is reduced, the feed will quickly sink into water, the expansion degree will be extremely unstable, the deformation rate will increase, the qualified rate of finished products will greatly reduce the cost, the output will decrease by more than 30%, the energy consumption will increase, and the cost will increase; at the same time, the feed viscosity will be poor. , the stability in the water decreases, and it is easy to damage the water quality and cause fish stress to cause disease

And the high content of carbohydrates can easily lead to the formation of fatty liver in fish

[0013] But so far, there is no high-quality compound slow-sinking feed that can completely replace the traditional farming model for the needs of carnivorous fish farming.

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