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A processing method of controllable bulk density aquatic product extruded feed pellets

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 adverse effects on product quality and increased differences in bulk density

Active Publication Date: 2022-05-27
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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  • A processing method of controllable bulk density aquatic product extruded feed pellets
  • A processing method of controllable bulk density aquatic product extruded feed pellets
  • A processing method of controllable bulk density aquatic product extruded feed pellets

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

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

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

[0029] The extruded feed particles containing liquid oil are obtained. After mixing the extruded feed particles containing liquid oil and other particles with pores, vacuum is drawn at a speed of 0.002-0.01MPa / min, and the vacuum degree is -0.02--0.06MPa. Under the condition of vacuum mixi...

Embodiment 1

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

[0041] Table 2 Basic feed composition and nutritional level

[0042]

[0043] The extruding chamber of the MY56 twin-screw extruder used in the experiment is divided into 3 zones, and the temperature of the extruding chamber is controlled by adjusting the amount of steam added. 130℃, the die temperature is 125℃, the conditioning temperature is 100℃, the steam pressure is 0.25MPa, the moisture content after conditioning is 27%, the screw speed is 300rpm, and the opening area per ton of material is 200mm 2 / t / h, the diameter of the die hole is 5mm, the template with 2 holes, the cutter speed is 60HZ, ...

Embodiment 2

[0048] Get 5.0kg of the aquatic puffed pellet feed obtained by the test in Example 1, and spray the mixed oil of 0.5kg vegetable oil at a speed of 4.0mL / min; Speed ​​mixing, keep in vacuum state for 2min after completion, release the vacuum, take out the aquatic puffed granules after spraying the oil, at room temperature, the aquatic puffed granules oil is fully balanced for 5min.

[0049] Add 4kg of the aquatic puffed granules (Particle 1) after adding grease, move it into a vacuum mixer and add 1.0kg of 3.0mm particle size puffed particles (Particle 2) without oil spray treatment, and slowly vacuumize at a speed of 0.01MPa / min , make it reach -0.06MPa vacuum degree, and stir the two kinds of puffed particles in the vacuum box, so that the particle 2 can absorb the precipitation oil on the surface of the particle 1, and heat the stearic acid to 85 ℃ to make it in a molten liquid state. The pump was sprayed into the vacuum mixer, and the vacuum was slowly evacuated to a vacuum...

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Abstract

The invention provides a method for processing puffed aquatic feed granules with controllable bulk density, which belongs to the technical field of aquatic feed processing; liquid oil is vacuum-sprayed on puffed feed granules, and the liquid grease flows into the pores of the puffed feed granules under the action of vacuum pressure difference Internal migration, evenly distributed in the pores and the outer surface of the extruded feed pellets; release the vacuum and put in extruded feed pellets that have a significant difference in particle size from the extruded feed containing liquid oil and without oil; under vacuum conditions, the extruded feed pellets containing liquid oil The liquid oil in the pores of the extruded feed granules is extruded to the surface of the extruded granules, and the liquid oil migrated to the surface of the granules is absorbed by the second oil-free extruded feed granules, reducing the single grain weight of the target granules; Into the mixed feed granules, vacuumize and lower the temperature to change the packaging material from liquid to solid, and coat the target granules to meet the requirements of regulating the bulk density and floatability of puffed granules containing liquid oil.

Description

technical field [0001] The invention relates to the technical field of aquatic feed processing, in particular to a processing method of controllable bulk density aquatic extruded feed particles. Background technique [0002] As the aquaculture industry develops in the direction of scale, intensification and specialization, feed is also facing a new round of changes. The disadvantages of traditional hard pelleted feeds are gradually emerging. Compared with traditional hard pelleted feeds, extruded pelleted feeds have become the mainstream of the market due to their advantages of improving growth performance and breeding efficiency, high digestibility and utilization rate, and low bait coefficient. [0003] In order to ensure the energy level of the puffed aquatic granules, generally, after the puffed granules are made, additional grease is added by vacuum spraying technology, but the addition of grease will lead to an increase in the difference in the bulk density of the prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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