Fish feed preparation raw material adding method

Abstract

The invention discloses a fish feed preparation raw material adding method, which comprises 20 parts of fish meal, 20 parts of soybean meal, 10 parts of spirulina powder, 10 parts of quinoa powder, 5 parts of eucommia ulmoides extract, 5 parts of yucca extract, 15 parts of hermetia illucens larva powder, 5 parts of probiotic liquid, 5 parts of camelina oil, and 5 parts of yeast powder. The fish meal, the soybean meal, the spirulina powder, the chenopodium quinoa flour and the hermetia illucens larva powder are mixed according to a proper proportion through a conveying belt, the overall nutrition balance of the feed is increased by adding various raw materials of various fish feeds, the reasonable proportion of various nutritional ingredients in the feed is ensured, the nutritional requirements of fishes in different growth stages are met, and the feed is suitable for large-scale production. Raw materials easy to digest and absorb by fishes are selected, the utilization rate of the feed is improved, the feed is not added, the safety is high, the raw materials can be replaced during preparation, and on the premise of meeting the nutritional requirements of the fishes, the cost is reduced, the economic benefit is improved, the ammonia nitrogen content of excrement is reduced, and the aquaculture water body is purified.

Description

Technical Field

[0001] The invention discloses a method for adding raw materials for preparing fish feed, and belongs to the technical field of fish feed preparation. Background Art

[0002] With the rapid development of aquaculture in my country, fish feed is generally used to feed aquatic products, so the fish feed industry has also made significant progress. At present, my country's fish feed industry mainly relies on imported raw materials, and the preparation method is relatively traditional, with grains, soybean meal, etc. as the main raw materials, and the nutritional components are single, which is difficult to meet the needs of fish at different growth stages. The proportion of various nutrients in the feed is unreasonable and cannot meet the nutritional needs of fish at different growth stages. At the same time, some fish feeds are not easy for fish to digest and absorb, which reduces the feed utilization rate. In addition, the fish feed itself has a high nutritional cost, and some feeds will cause waste and pollution due to poor palatability. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the problem in the prior art that the catalysts or biological strains used in the extraction process of ginsenosides are too complicated, resulting in a relatively cumbersome filtration process, and to provide a method for adding raw materials to fish feed preparation, thereby solving the above problem.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a method for adding raw materials to fish feed preparation, comprising 20 parts of fish meal, 20 parts of soybean meal, 10 parts of spirulina powder, 10 parts of quinoa powder, 5 parts of eucommia extract, 5 parts of yucca extract, 15 parts of black soldier fly larvae powder, 5 parts of probiotic liquid, 5 parts of camelina oil, and 5 parts of yeast powder.

[0005] Preferably, the fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder are output from a storage bin in suitable proportions via a conveyor belt and injected into an ultrafine grinder, the protein-containing raw materials are ultrafinely grinded by the ultrafine grinder to increase their specific surface area and improve digestion and absorption rate, and then the camelina oil is injected into a decolorization and deodorization machine for decolorization and deodorization to improve the palatability of the feed.

[0006] Preferably, the fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder are placed in a double-screw mixer for mixing, and then camelina oil is added in sequence for mixing, followed by adding eucommia extract and yucca extract for mixing, and finally the probiotic solution and yeast powder are injected to complete the overall mixing, ensuring that the raw materials are evenly mixed, checking the mixing uniformity, and ensuring that the coefficient of variation is within an acceptable range.

[0007] Preferably, the mixture of fish meal, soybean meal, spirulina powder, quinoa powder, eucommia extract, yucca extract, black soldier fly larvae powder, probiotic liquid, camelina oil and yeast powder is injected into a granulator, the temperature and pressure of the granulator are set, the particle size is adjusted according to the feeding habits of the fish, the granulation process is observed to ensure that the particle shape and hardness meet the requirements, the mixed raw materials are made into granular feed, and then the granular fish feed is injected into a disc dryer for drying the granulated feed to reduce the moisture content, and finally the fish feed is injected into a cooling tower to cool the dried feed to maintain the feed quality.

[0008] Preferably, the fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder are all rich in protein, and the spirulina is rich in various vitamins and minerals, which can enhance the immunity of fish and improve body color, and the quinoa powder is rich in dietary fiber and various trace elements.

[0009] Preferably, the Eucommia ulmoides extract has the effects of antibacterial, enhancing immunity and improving meat quality, and the Yucca schidigera extract reduces the ammonia nitrogen content in fish excrement and purifies the aquaculture water environment.

[0010] Preferably, the probiotic liquid contains bacillus and lactic acid bacteria, which help the fish's intestinal health and promote digestion and absorption. The yeast powder is rich in B vitamins and protein, and the yeast cell wall polysaccharide in the yeast powder increases the fish's immune function. Preferably, the method comprises the following preparation steps: (1) First, fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder in appropriate proportions are output from the storage bin through a conveyor belt and injected into the ultrafine grinder. The ultrafine grinder is turned on to quickly grind the fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder. When the raw materials are ground to a certain degree, the grinding is stopped to increase their specific surface area and improve the digestion and absorption rate. At the same time, camelina oil is injected into the decolorization and deodorization machine for decolorization and deodorization; (2) At this time, fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder are placed in a double-screw mixer and mixed, and then camelina oil is added in turn, followed by eucommia extract and yucca extract. Finally, probiotic solution, yeast powder and an equal proportion of water are added to complete the overall mixing. At this time, the machine mixes at a medium speed for 30 minutes to ensure that the raw materials are evenly mixed. The mixture is tested by a uniformity detector on the machine to ensure that the mixing uniformity is ≥95% and that the coefficient of variation is within an acceptable range. (3) Then inject the mixed raw materials into the granulator and set the machine parameters: granulation temperature: 80-90℃ to maintain the nutritional content of the raw materials; granulation pressure: 300-400bar to ensure a tight particle structure; particle size: 2-4mm, suitable for fish at different growth stages; particle hardness ≥90 Shore A. At this time, the granulator will granulate the mixed raw materials, adjust the particle size according to the feeding habits of the fish, observe the granulation process, and ensure that the particle shape and hardness meet the requirements. The mixed raw materials are made into granular feed, and then the granular fish feed is injected into the disc dryer. The drying temperature is: 60-70℃ to reduce the moisture content of the feed to less than 10%. The drying time is 2 hours to ensure that the feed is completely dry. (4) Pour the completely dried fish feed into the cooling tower and set the room temperature to maintain the feed quality. Cool the feed at room temperature for 1 hour. After the feed temperature drops to room temperature, take it out and use it in the automatic packaging machine for packaging.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the overall nutritional balance of the feed is increased by adding multiple raw materials to multiple fish feeds, ensuring that the proportions of various nutrients in the feed are reasonable, meeting the nutritional needs of fish at different growth stages, selecting raw materials that are easy for fish to digest and absorb, and improving feed utilization. In addition, the feed has no additives and is relatively safe, and can be replaced during production. On the premise of meeting the nutritional needs of fish, the cost is reduced and the economic benefit is improved. At the same time, the ammonia nitrogen content of excrement is reduced and the aquaculture water is purified. DETAILED DESCRIPTION

[0012] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0013] A method for adding raw materials to fish feed preparation comprises 20 parts of fish meal, 20 parts of soybean meal, 10 parts of spirulina powder, 10 parts of quinoa powder, 5 parts of eucommia extract, 5 parts of yucca extract, 15 parts of black soldier fly larvae powder, 5 parts of probiotic liquid, 5 parts of camelina oil and 5 parts of yeast powder.

[0014] The fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder are output from a storage bin in a suitable proportion through a conveyor belt and injected into an ultrafine grinder. The protein-containing raw materials are ultrafinely grinded by the ultrafine grinder to increase their specific surface area and improve digestion and absorption rate. Then, camelina oil is injected into a decolorization and deodorization machine for decolorization and deodorization to improve the palatability of the feed.

[0015] Among them, the fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder are put into a double-screw mixer for mixing, and then camelina oil is added in turn for mixing, followed by adding eucommia extract and yucca extract for mixing, and finally injecting probiotic liquid and yeast powder to complete the overall mixing, ensuring that the raw materials are evenly mixed, checking the mixing uniformity, and ensuring that the coefficient of variation is within an acceptable range.

[0016] The fish meal, soybean meal, spirulina powder, quinoa powder, eucommia extract, yucca extract, black soldier fly larvae powder, probiotic liquid, camelina oil and yeast powder mixture is injected into a granulator, the temperature and pressure of the granulator are set, the particle size is adjusted according to the feeding habits of the fish, the granulation process is observed to ensure that the particle shape and hardness meet the requirements, the mixed raw materials are made into granular feed, and then the granular fish feed is injected into a disc dryer to dry the granulated feed and reduce the moisture content, and finally the fish feed is injected into a cooling tower to cool the dried feed to maintain the feed quality.

[0017] Among them, the fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder are all rich in protein, and the spirulina is rich in various vitamins and minerals, which can enhance the immunity of fish and improve body color, and the quinoa powder is rich in dietary fiber and various trace elements.

[0018] Among them, the Eucommia ulmoides extract has the effects of antibacterial, enhancing immunity and improving meat quality, and the Yucca schidigera extract reduces the ammonia nitrogen content in fish excrement and purifies the aquaculture water environment.

[0019] The probiotic liquid contains bacillus and lactic acid bacteria, which help the fish's intestinal health and promote digestion and absorption. The yeast powder is rich in B vitamins and protein, and the yeast cell wall polysaccharides in the yeast powder increase the fish's immune function.

[0020] Example 1 In this embodiment of the present invention, a method for adding raw materials to fish feed is provided, wherein the fish feed is composed of the following raw materials in the following quantitative proportions:

[0021] In this embodiment, a method for adding raw materials to fish feed preparation includes the following preparation steps: A method for adding raw materials to fish feed preparation, characterized in that it comprises the following preparation steps: (1) First, fish meal, soybean meal, spirulina powder, and quinoa powder in appropriate proportions are output from the storage bin through a conveyor belt and injected into the ultrafine grinder. The ultrafine grinder is turned on to quickly grind the fish meal, soybean meal, spirulina powder, and quinoa powder. When the raw materials are ground to a certain degree, the grinding is stopped to increase their specific surface area and improve the digestion and absorption rate. (2) At this time, fish meal, soybean meal, spirulina powder, and quinoa powder are placed in a double-screw mixer and mixed. Eucommia extract is then added. Finally, probiotic solution, yeast powder, and an equal proportion of water are injected to complete the overall mixing. At this time, the machine mixes at a medium speed for 30 minutes to ensure that the raw materials are mixed evenly. The mixture is tested by a uniformity detector on the machine to ensure that the mixing uniformity is ≥95% and that the coefficient of variation is within an acceptable range. (3) Then inject the mixed raw materials into the granulator and set the machine parameters: granulation temperature: 80-90℃ to maintain the nutritional content of the raw materials; granulation pressure: 300-400bar to ensure a tight particle structure; particle size: 2-4mm, suitable for fish at different growth stages; particle hardness ≥90 Shore A. At this time, the granulator will granulate the mixed raw materials, adjust the particle size according to the feeding habits of the fish, observe the granulation process, and ensure that the particle shape and hardness meet the requirements. The mixed raw materials are made into granular feed, and then the granular fish feed is injected into the disc dryer. The drying temperature is: 60-70℃ to reduce the moisture content of the feed to less than 10%. The drying time is 2 hours to ensure that the feed is completely dry. (4) Pour the completely dried fish feed into the cooling tower and set the room temperature to maintain the feed quality. Cool the feed at room temperature for 1 hour. After the feed temperature drops to room temperature, take it out and use it in the automatic packaging machine for packaging.

[0022] In summary, the overall protein in fish feed can be easily increased through fish meal, soybean meal, spirulina powder, quinoa powder, eucommia extract, probiotic liquid and yeast powder. Spirulina is rich in various vitamins and minerals, which can enhance the immunity of fish and improve body color. Quinoa powder is rich in dietary fiber and various trace elements. Eucommia extract has antibacterial, immunity-enhancing and meat quality-improving effects. Probiotic liquid contains Bacillus and lactic acid bacteria, which help the intestinal health of fish and promote digestion and absorption. Yeast powder is rich in B vitamins and protein. At the same time, the yeast cell wall polysaccharides in yeast powder increase the immune function of fish.

[0023] Example 2 In this embodiment of the present invention, a method for adding raw materials to fish feed is provided, wherein the fish feed is composed of the following raw materials in the following quantitative proportions:

[0024] In this embodiment, a method for adding raw materials to fish feed preparation includes the following preparation steps: (1) First, fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder in appropriate proportions are output from the storage bin into the ultrafine grinder through a conveyor belt, and the ultrafine grinder is turned on to quickly grind the fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder. When the raw materials are ground to a certain degree, the grinding is stopped to increase their specific surface area and improve the digestion and absorption rate; (2) At this time, fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder are placed in a double-screw mixer and mixed, and then Eucommia extract is added, and finally probiotic liquid, yeast powder and equal proportions of water are injected to complete the overall mixing. At this time, the machine mixes at a medium speed for 30 minutes to ensure that the raw materials are mixed evenly. The mixture is tested by the uniformity detector on the machine to ensure that the mixing uniformity is ≥95% and the coefficient of variation is within an acceptable range; (3) Then inject the mixed raw materials into the granulator and set the machine parameters: granulation temperature: 80-90℃ to maintain the nutritional content of the raw materials; granulation pressure: 300-400bar to ensure a tight particle structure; particle size: 2-4mm, suitable for fish at different growth stages; particle hardness ≥90 Shore A. At this time, the granulator will granulate the mixed raw materials, adjust the particle size according to the feeding habits of the fish, observe the granulation process, and ensure that the particle shape and hardness meet the requirements. The mixed raw materials are made into granular feed, and then the granular fish feed is injected into the disc dryer. The drying temperature is: 60-70℃ to reduce the moisture content of the feed to less than 10%. The drying time is 2 hours to ensure that the feed is completely dry. (4) Pour the completely dried fish feed into the cooling tower and set the room temperature to maintain the feed quality. Cool the feed at room temperature for 1 hour. After the feed temperature drops to room temperature, take it out and use it in the automatic packaging machine for packaging.

[0025] In summary, the black soldier fly larvae powder of Example 2 can replace part of the fish meal after defatting, thereby reducing the overall cost and increasing the quality of protein compared with Example 1.

[0026] Example 3 In this embodiment of the present invention, a method for adding raw materials to fish feed is provided, wherein the fish feed is composed of the following raw materials in the following quantitative proportions:

[0027] In this embodiment, a method for adding raw materials to fish feed preparation includes the following preparation steps: (1) First, fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder in appropriate proportions are output from the storage bin into the ultrafine grinder through a conveyor belt, and the ultrafine grinder is turned on to quickly grind the fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder. When the raw materials are ground to a certain degree, the grinding is stopped to increase their specific surface area and improve the digestion and absorption rate; (2) At this time, fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder are placed in a double-screw mixer for mixing, and then Eucommia extract and yucca extract are added for mixing. Finally, probiotic solution, yeast powder and equal proportions of water are added to complete the overall mixing. At this time, the machine mixes at a medium speed for 30 minutes to ensure that the raw materials are mixed evenly. The mixture is tested by the uniformity detector on the machine to ensure that the mixing uniformity is ≥95% and that the coefficient of variation is within an acceptable range; (3) Then inject the mixed raw materials into the granulator and set the machine parameters: granulation temperature: 80-90℃ to maintain the nutritional content of the raw materials; granulation pressure: 300-400bar to ensure a tight particle structure; particle size: 2-4mm, suitable for fish at different growth stages; particle hardness ≥90 Shore A. At this time, the granulator will granulate the mixed raw materials, adjust the particle size according to the feeding habits of the fish, observe the granulation process, and ensure that the particle shape and hardness meet the requirements. The mixed raw materials are made into granular feed, and then the granular fish feed is injected into the disc dryer. The drying temperature is: 60-70℃ to reduce the moisture content of the feed to less than 10%. The drying time is 2 hours to ensure that the feed is completely dry. (4) Pour the completely dried fish feed into the cooling tower and set the room temperature to maintain the feed quality. Cool the feed at room temperature for 1 hour. After the feed temperature drops to room temperature, take it out and use it in the automatic packaging machine for packaging.

[0028] In summary, compared with Example 1 and Example 2, Example 3 is helpful to reduce the ammonia nitrogen content in fish excrement after adding yucca extract in the fish feed mixing process, which can purify the aquaculture water environment and reduce water pollution.

[0029] Example 4 In this embodiment of the present invention, a method for adding raw materials to fish feed is provided, wherein the fish feed is composed of the following raw materials in the following quantitative proportions:

[0030] In this embodiment, a method for adding raw materials to fish feed preparation includes the following preparation steps: (1) First, fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder in appropriate proportions are output from the storage bin through a conveyor belt and injected into the ultrafine grinder. The ultrafine grinder is turned on to quickly grind the fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder. When the raw materials are ground to a certain degree, the grinding is stopped to increase their specific surface area and improve the digestion and absorption rate. At the same time, camelina oil is injected into the decolorization and deodorization machine for decolorization and deodorization; (2) At this time, fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder are placed in a double-screw mixer and mixed, and then camelina oil is added in turn, followed by eucommia extract and yucca extract. Finally, probiotic solution, yeast powder and an equal proportion of water are added to complete the overall mixing. At this time, the machine mixes at a medium speed for 30 minutes to ensure that the raw materials are evenly mixed. The mixture is tested by a uniformity detector on the machine to ensure that the mixing uniformity is ≥95% and that the coefficient of variation is within an acceptable range. (3) Then inject the mixed raw materials into the granulator and set the machine parameters: granulation temperature: 80-90℃ to maintain the nutritional content of the raw materials; granulation pressure: 300-400bar to ensure a tight particle structure; particle size: 2-4mm, suitable for fish at different growth stages; particle hardness ≥90 Shore A. At this time, the granulator will granulate the mixed raw materials, adjust the particle size according to the feeding habits of the fish, observe the granulation process, and ensure that the particle shape and hardness meet the requirements. The mixed raw materials are made into granular feed, and then the granular fish feed is injected into the disc dryer. The drying temperature is: 60-70℃ to reduce the moisture content of the feed to less than 10%. The drying time is 2 hours to ensure that the feed is completely dry. (4) Pour the completely dried fish feed into the cooling tower and set the room temperature to maintain the feed quality. Cool the feed at room temperature for 1 hour. After the feed temperature drops to room temperature, take it out and use it in the automatic packaging machine for packaging.

[0031] In summary, compared with Example 1, Example 2 and Example 3, Example 4 is rich in unsaturated fatty acids because camelina oil is mixed with other oils in a certain proportion and added, and the fish feed is beneficial to the health of fish and the delicious meat.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for adding raw materials to fish feed preparation, characterized in that: It includes 20 parts of fish meal, 20 parts of soybean meal, 10 parts of spirulina powder, 10 parts of quinoa powder, 5 parts of eucommia extract, 5 parts of yucca extract, 15 parts of black soldier fly larvae powder, 5 parts of probiotic liquid, 5 parts of camelina oil, and 5 parts of yeast powder.

2. The method for adding raw materials to fish feed according to claim 1, characterized in that: The fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder are output from a storage bin in a suitable proportion through a conveyor belt and injected into an ultrafine grinder. The protein-containing raw materials are ultrafinely grinded by the ultrafine grinder to increase their specific surface area and improve digestion and absorption rate. Then, camelina oil is injected into a decolorization and deodorization machine for decolorization and deodorization to improve the palatability of the feed.

3. The method for adding raw materials to fish feed according to claim 1, characterized in that: The fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder are placed in a double-screw mixer and mixed, and then camelina oil is added in sequence and mixed, followed by adding eucommia extract and yucca extract and mixing, and finally injecting probiotic liquid and yeast powder to complete the overall mixing, ensuring that the raw materials are evenly mixed, checking the mixing uniformity, and ensuring that the coefficient of variation is within an acceptable range.

4. The method for adding raw materials to fish feed according to claim 1, characterized in that: The mixture of fish meal, soybean meal, spirulina powder, quinoa powder, eucommia extract, yucca extract, black soldier fly larvae powder, probiotic liquid, camelina oil and yeast powder is injected into a granulator, the temperature and pressure of the granulator are set, the particle size is adjusted according to the feeding habits of fish, the granulation process is observed to ensure that the particle shape and hardness meet the requirements, the mixed raw materials are made into granular feed, and then the granular fish feed is injected into a disc dryer for drying the granulated feed to reduce the moisture content, and finally the fish feed is injected into a cooling tower to cool the dried feed to maintain the feed quality.

5. The method for adding raw materials to fish feed according to claim 1, characterized in that: The fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder are all rich in protein, and the spirulina is rich in various vitamins and minerals, which can enhance the immunity of fish and improve body color, and the quinoa powder is rich in dietary fiber and various trace elements.

6. The method for adding raw materials to fish feed according to claim 1, characterized in that: The eucommia extract has the effects of antibacterial, enhancing immunity and improving meat quality, and the yucca extract reduces the ammonia nitrogen content in fish excrement and purifies the aquaculture water environment.

7. The method for adding raw materials to fish feed according to claim 1, characterized in that: The probiotic liquid contains bacillus and lactic acid bacteria, which help the fish's intestinal health and promote digestion and absorption. The yeast powder is rich in B vitamins and protein, and the yeast cell wall polysaccharide in the yeast powder increases the fish's immune function.

8. The method for adding raw materials to fish feed according to claim 1, characterized in that: The method comprises the following preparation steps: (1) First, fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder in appropriate proportions are output from the storage bin through a conveyor belt and injected into the ultrafine grinder. The ultrafine grinder is turned on to quickly grind the fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder. When the raw materials are ground to a certain degree, the grinding is stopped to increase their specific surface area and improve the digestion and absorption rate. At the same time, camelina oil is injected into the decolorization and deodorization machine for decolorization and deodorization; (2) At this time, fish meal, soybean meal, spirulina powder, quinoa powder and black soldier fly larvae powder are placed in a double-screw mixer and mixed, and then camelina oil is added in turn, followed by eucommia extract and yucca extract. Finally, probiotic solution, yeast powder and an equal proportion of water are added to complete the overall mixing. At this time, the machine mixes at a medium speed for 30 minutes to ensure that the raw materials are evenly mixed. The mixture is tested by a uniformity detector on the machine to ensure that the mixing uniformity is ≥95% and that the coefficient of variation is within an acceptable range. (3) Then inject the mixed raw materials into the granulator and set the machine parameters: granulation temperature: 80-90℃ to maintain the nutritional content of the raw materials; granulation pressure: 300-400bar to ensure a tight granule structure; granule size: 2-4mm, suitable for fish at different growth stages; The hardness of the pellets is ≥90 Shore A. At this time, the pelletizer will pelletize the mixed raw materials, adjust the particle size according to the feeding habits of the fish, observe the pelletizing process, ensure that the particle shape and hardness meet the requirements, make the mixed raw materials into granular feed, and then inject the granular fish feed into the disc dryer. The drying temperature is 60-70℃ to reduce the moisture content of the feed to less than 10%. The drying time is 2 hours to ensure that the feed is completely dry. (4) Pour the completely dried fish feed into the cooling tower and set the room temperature to maintain the feed quality. Cool the feed at room temperature for 1 hour. After the feed temperature drops to room temperature, take it out and use it in the automatic packaging machine for packaging.

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