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Processing method of volume-weight-controllable expanded aquatic feed particles

A technology of extruded feed and processing method, which is applied in the forming or processing of animal feed, animal feed, climate change adaptation, etc., and can solve problems such as increased bulk density difference and adverse effects on product quality

Active Publication Date: 2021-06-18
FEED RESEARCH INSTITUTE CHINESE ACADEMY OF AGRICULTURAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to ensure the energy level of aquatic puffed granules, after making puffed granules, additional oil is added through vacuum spraying technology, but the addition of oil will increase the difference in bulk density of the product, which will have an adverse effect on product quality

Method used

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  • Processing method of volume-weight-controllable expanded aquatic feed particles
  • Processing method of volume-weight-controllable expanded aquatic feed particles
  • Processing method of volume-weight-controllable expanded aquatic feed particles

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] The present invention has no special limitation on the preparation method of the expanded granules, and conventional methods in the art can be used.

[0028] In the present invention, the liquid oil is vacuum-sprayed on the puffed feed granules, and the liquid oil migrates to the inside of the pores of the puffed granules under the action of the vacuum pressure difference, and is evenly distributed in the pores and the outer surface of the puffed feed granules to obtain liquid oil-containing For extruded feed granules, the pressure of the remaining air bubbles in the pores of the extruded feed granules containing liquid oil is balanced with the atmospheric pressure.

[0029] To obtain the extruded feed granules containing liquid oil, the present invention mixes the extruded feed granules containing liquid oil and other particles with pores, and vacuumizes at a speed of 0.002-0.01 MPa / min. Under the condition of vacuum mixing for 20-60s, the other particles with pores af...

Embodiment 1

[0040] The formula composition and nutritional components are shown in Table 2. Various feed materials were passed through an 80-mesh sieve, and 500 kg of mixed feed was prepared and mixed. The aquatic product extruded feed pellets were prepared with the MY56 twin-screw extruder (Muyang) at the Nankou Experimental Base of the Feed Research Institute of the Chinese Academy of Agricultural Sciences.

[0041] Table 2 Basic feed composition and nutritional level

[0042]

[0043] The expansion cavity of the MY56 twin-screw extrusion puffing machine used in the experiment is divided into 3 zones. The temperature of the expansion cavity is controlled by adjusting the amount of steam added. The temperature of the expansion cavity 1 is 98 ° C, the temperature of the expansion cavity 2 is 120 ° C, and the temperature of the expansion cavity 3 is 130°C, die head temperature 125°C, tempering temperature 100°C, steam pressure 0.25MPa, moisture content after tempering 27%, screw speed 30...

Embodiment 2

[0048] Get 5.0kg of the aquatic product extruded pellet feed obtained by the test in Example 1, spray the mixed oil of 0.5kg vegetable oil at a speed of 4.0mL / min; Mix at a high speed. After completion, keep it in a vacuum state for 2 minutes, release the vacuum, take out the aquatic product puffed granules sprayed with oil, and fully balance the aquatic product puffed granule oil for 5 minutes at room temperature.

[0049] Put 4kg of extruded aquatic products (granule 1) after adding oil into the vacuum mixer and add 1.0kg of extruded granular material (granule 2) with a particle size of 3.0mm that has not been sprayed with oil, and slowly vacuumize at a speed of 0.01MPa / min , make it reach the vacuum degree of -0.06MPa, and stir the two kinds of puffed granules in the vacuum box, so that granule 2 can absorb the precipitated oil on the surface of granule 1, heat the stearic acid to 85°C, make it in a molten liquid state, and pass the infusion The pump is sprayed into the vac...

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Abstract

The invention provides a processing method of volume-weight-controllable expanded aquatic feed particles, and belongs to the technical field of aquatic feed processing. The processing method comprises steps as follows: liquid grease is sprayed onto the expanded feed particles in a vacuum mode, and the liquid grease migrates into pores of the expanded feed particles under the action of vacuum pressure difference and is evenly distributed in the pores of the expanded feed particles and on the outer surfaces of the pores of the expanded feed particles; vacuum release is carried out, and unoiled expanded feed particles which are obviously different from the expanded feed particles containing the liquid grease in diameter are fed; under the vacuum condition, the liquid grease in the pores of the expanded feed particles containing the liquid grease is extruded to the surfaces of the expanded particles, and the liquid grease migrating to the surfaces of the particles is absorbed by the oil-free expanded feed particles fed for the second time, so that the single-grain weight of target particles is reduced; and finally, a liquid packing material is sprayed into the mixed feed particles, vacuumizing is performed, the temperature is reduced to change the packing material from a liquid state to a solid state, and the target particles are coated, so that the requirements of regulating and controlling the volume weight and the sinking and floating property of the expanded particles containing the liquid grease are met.

Description

technical field [0001] The invention relates to the technical field of aquatic feed processing, in particular to a method for processing extruded aquatic feed granules with controllable bulk density. Background technique [0002] With the development of the aquaculture industry in the direction of scale, intensification and specialization, feed is also facing a new round of changes. The disadvantages of traditional hard pellet feeds are gradually appearing. Compared with traditional hard pellet feeds, extruded pellet feeds have become the mainstream of the market due to their advantages of improving growth performance and breeding benefits, high digestibility and low feed coefficient. [0003] In order to ensure the energy level of aquatic puffed pellets, after making puffed pellets, additional oil is added through vacuum spraying technology, but the addition of grease will increase the difference in bulk density of the product, which will have an adverse effect on product q...

Claims

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Application Information

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IPC IPC(8): A23K40/30A23K20/158A23K50/80
CPCA23K40/30A23K20/158A23K50/80Y02A40/818
Inventor 董颖超李军国杨洁牛力斌李俊谷旭
Owner FEED RESEARCH INSTITUTE CHINESE ACADEMY OF AGRICULTURAL SCIENCES