Method for avoiding oxidative deterioration of pet feed

Abstract

The invention discloses a method for avoiding oxidative deterioration of pet feed. The method comprises the following steps: firstly, mixing corn flour, soybean meal, wheat flour, oat flour, sorghum flour, seaweed meal and the like to prepare mixed powder; mixing fresh meat with water, grinding to obtain meat slurry, heating and curing the meat slurry, and naturally cooling to room temperature to obtain cured meat slurry; vegetables are cut up and ground into thick liquid, and vegetable thick liquid is obtained; uniformly stirring and mixing the mixed powder with the cured meat pulp, the vegetable pulp, the mulberry leaf powder and the raw dark green tea powder, inoculating a complex microbial inoculant, and fermenting to obtain a fermentation product; the complex microbial inoculant is prepared by mixing saccharomyces cerevisiae, bacillus subtilis, lactobacillus helveticus and propionibacterium in equal volume; and finally, performing pre-drying, granulation and microwave drying on the fermentation product, and performing pulsed magnetic field treatment under a far infrared condition to obtain the pet feed. The pet feed obtained by the method is not easy to damp and cake, and does not go mouldy and deteriorate after long-time storage.

Description

Technical Field

[0001] The invention relates to a method for preventing pet feed from being oxidized and deteriorated, belonging to the technical field of feed processing. Background Art

[0002] More and more people are raising pets. Accordingly, there is a huge market demand for pet-related industries.

[0003] Pet food mainly includes the following ingredients:

[0004] 1. Protein: It is an important component of pet's tissue cells and is involved in many physiological functions such as conduction, transportation, support and protection. Insufficient protein may lead to digestive disorders, stunted growth and anemia, while excessive protein may cause metabolic disorders and affect heart and digestive functions.

[0005] 2. Fat: It is a source of energy for pets and helps digestion and absorption of fat-soluble vitamins. Lack of fat can lead to skin problems, such as increased dandruff and rough fur, while proper intake of fat can stimulate appetite and promote the absorption of fat-soluble vitamins.

[0006] 3. Carbohydrates: The main source of energy for pets, providing 80% of the required energy. Adult dogs need 10 grams of carbohydrates per kilogram of body weight per day, and puppies need more.

[0007] 4. Minerals: Minerals include calcium, phosphorus, zinc, copper, magnesium, etc. They are important raw materials for the collective tissues of pets and help regulate the acid-base balance and muscle contraction in the body.

[0008] 5. Vitamins: Vitamins are also important to the health of pets. They are involved in many physiological processes. Vitamin deficiency can lead to corresponding health problems.

[0009] Pet feed provides adequate protection for the health, growth and development of pets through ingredients such as protein, fat, carbohydrates, minerals and vitamins.

[0010] There are many types of pet feeds on the market, with different specific formulas and compositions, but they are generally susceptible to moisture and poor antioxidant properties, which makes pet feeds prone to oxidation and deterioration. Some manufacturers add antioxidants and preservatives to prevent pet feeds from oxidation and deterioration, but these antioxidants and preservatives can affect the growth and development of pets and are not suitable for long-term use. Summary of the invention

[0011] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a method for preventing oxidative deterioration of pet feed.

[0012] To achieve the above object, the present invention adopts the following technical solutions:

[0013] A method for preventing oxidative deterioration of pet feed, the specific steps are as follows:

[0014] (1) First, mix the following components by weight to prepare a mixed powder: 25-30 parts of corn flour, 25-30 parts of soybean meal, 10-15 parts of wheat flour, 10-12 parts of oat flour, 8-10 parts of sorghum flour, and 5-7 parts of seaweed powder;

[0015] (2) mixing the fresh meat with water and grinding it to obtain meat slurry, heating the meat slurry to mature it, and naturally cooling it to room temperature to obtain mature meat slurry; chopping and grinding the vegetables to obtain vegetable slurry;

[0016] (3) then stirring and mixing the mixed powder with cooked meat slurry, vegetable slurry, mulberry leaf powder, and dark tea powder, adding a composite bacterial agent, and fermenting to obtain a fermentation product; the composite bacterial agent is obtained by mixing equal volumes of saccharomyces cerevisiae, Bacillus subtilis, Lactobacillus helveticus, and Propionibacterium;

[0017] (4) Finally, the fermentation product is pre-dried, granulated, and microwave-dried, and subjected to pulse magnetic field treatment under far-infrared conditions to obtain pet feed.

[0018] Preferably, in step (1), the particle size of each component is 50 to 100 μm.

[0019] Preferably, in step (2), the amount of water used is 3 to 4 times the mass of fresh meat, and the fresh meat is obtained by mixing any one or more of lean pork, beef, mutton, chicken, and fish with fat pork in a mass ratio of 1:0.6 to 0.7.

[0020] Preferably, in step (2), the process conditions for heating and aging are: heating to 100° C. and keeping warm for 10 minutes.

[0021] Preferably, in step (2), the vegetables are obtained by mixing leafy vegetables, root vegetables, melons and tomatoes, mushrooms, etc.

[0022] Further preferably, the leafy vegetables are selected from any one or more of cabbage, spinach, and rapeseed, the root vegetables are selected from any one or more of carrots, lotus roots, potatoes, and yams, the melons and tomatoes are selected from any one or more of pumpkin, wax gourd, and eggplant, and the mushrooms are selected from any one or more of oyster mushrooms, shiitake mushrooms, and enoki mushrooms.

[0023] Preferably, in step (3), the mass ratio of the mixed powder, cooked meat slurry, vegetable slurry, mulberry leaf powder and dark tea powder is 20-30:30-40:10-15:6-9:5-7.

[0024] Preferably, in step (3), the mulberry leaf powder or dark tea powder is made from mulberry leaves or dark tea as raw materials, which are naturally air-dried and then crushed to a particle size of 100 to 200 μm.

[0025] Preferably, in step (3), the volume inoculation amount of the composite bacterial agent is 2-3%.

[0026] Preferably, in step (3), in the composite bacterial agent, the effective viable counts of Saccharomyces cerevisiae, Bacillus subtilis, Lactobacillus helveticus, and Propionibacterium are 2×10 9 cfu / mL, 5×10 8 cfu / mL, 8×10 8 cfu / mL, 6×10 7 cfu / mL.

[0027] Preferably, in step (3), the fermentation conditions are: fermentation at 35-37° C. for 3-5 days.

[0028] Preferably, in step (4), pre-drying is performed to a moisture content of 10 to 12% by weight, and the granulation particle size is 6 to 8 mm.

[0029] Preferably, in step (4), the process conditions of microwave drying are: power 500-700 W, microwave irradiation for 6-9 s, stop for 15-20 s, and this cycle is repeated until the cumulative irradiation time is 60-70 minutes.

[0030] Preferably, in step (4), the far-infrared wavelength is 30-40 μm, and the process conditions of the pulsed magnetic field are: magnetic field intensity 3-5 T, number of pulses 30-50, pulse interval 30 s; and the processing time is 10-15 minutes.

[0031] Beneficial effects of the present invention:

[0032] The present invention first mixes corn flour, soybean meal, wheat flour, oat flour, sorghum flour, seaweed flour and the like to prepare mixed powder; then mixes fresh meat with water to grind to obtain meat pulp, heats and matures the meat pulp, and naturally cools to room temperature to obtain cooked meat pulp; chop and grind vegetables to obtain vegetable pulp; then stir and mix the mixed powder with cooked meat pulp, vegetable pulp, mulberry leaf powder and black tea powder, add composite bacterial agent, ferment and obtain fermentation product; the composite bacterial agent is obtained by mixing equal volumes of saccharomyces cerevisiae, bacillus subtilis, lactobacillus helveticus and propionibacterium; finally, the fermentation product is pre-dried, granulated and microwave dried, and subjected to pulse magnetic field treatment under far infrared conditions to obtain pet feed. The pet feed obtained by the method of the present invention is not easy to be damp and agglomerated, and will not be moldy and deteriorated after long-term storage.

[0033] The feed of the invention has reasonable composition, provides sufficient nutritional support for the growth of pets, and has healthy, safe and reliable raw material sources.

[0034] Mulberry leaf powder and dark tea powder contain antioxidant and preservative ingredients, and in the subsequent fermentation process, more antioxidant and preservative substances are produced through the fermentation action of Propionibacterium and other bacteria, which work synergistically to improve the antioxidant and preservative properties of pet feed.

[0035] After the fermentation is completed, pre-drying and granulation are carried out. Finally, the antioxidant and antiseptic properties of the pet feed are further improved through the coupling effect of microwave drying and pulsed magnetic field treatment under far-infrared conditions. The pet feed will not oxidize and deteriorate when stored for a long time. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with embodiments. It should be noted that the following description is only for explaining the present invention and does not limit its contents.

[0037] Embodiment 1:

[0038] A method for preventing oxidative deterioration of pet feed, the specific steps are as follows:

[0039] (1) First, the following components are mixed to prepare mixed powder: 25 kg corn flour, 25 kg soybean meal, 10 kg wheat flour, 10 kg oat flour, 8 kg sorghum flour, and 5 kg seaweed flour; the particle size of each component is 50 μm;

[0040] (2) Mixing the fresh meat with water and grinding them to obtain meat slurry, heating the meat slurry to mature it, and naturally cooling it to room temperature (25° C.) to obtain mature meat slurry; chopping and grinding the vegetables to obtain vegetable slurry;

[0041] (3) then stirring and mixing the mixed powder with cooked meat slurry, vegetable slurry, mulberry leaf powder, and dark tea powder, adding a composite bacterial agent, and fermenting to obtain a fermentation product; the composite bacterial agent is obtained by mixing equal volumes of saccharomyces cerevisiae, Bacillus subtilis, Lactobacillus helveticus, and Propionibacterium;

[0042] (4) Finally, the fermentation product is pre-dried, granulated, and microwave-dried, and subjected to pulse magnetic field treatment under far-infrared conditions to obtain pet feed.

[0043] Wherein, in step (2), the amount of water used is 3 times the mass of fresh meat, and the fresh meat is obtained by mixing lean pork and fat pork in a mass ratio of 1:0.6.

[0044] The process conditions for heating and aging are: heating to 100°C and keeping warm for 10 minutes.

[0045] Vegetables are a mixture of leafy vegetables (cabbage), root vegetables (carrots), melons and tomatoes (pumpkins), mushrooms (oyster mushrooms), etc.

[0046] In step (3), the mass ratio of the mixed powder, cooked meat slurry, vegetable slurry, mulberry leaf powder and dark tea powder is 20:30:10:6:5.

[0047] Mulberry leaf powder or dark tea powder is made from mulberry leaves or dark tea as raw materials, which are naturally air-dried and then crushed to a particle size of 100 μm.

[0048] The volume inoculation amount of the composite bacterial agent is 2%. In the composite bacterial agent, the effective viable counts of Saccharomyces cerevisiae, Bacillus subtilis, Lactobacillus helveticus, and Propionibacterium are 2×10 9 cfu / mL, 5×10 8 cfu / mL, 8×10 8 cfu / mL, 6×10 7 cfu / mL.

[0049] Fermentation conditions: fermentation at 35°C for 3 days.

[0050] In step (4), pre-drying is performed until the moisture content is 10% by weight and the granulation particle size is 6 mm.

[0051] The process conditions of microwave drying are as follows: power 500 W, microwave irradiation for 6 s, stop for 15 s, and repeat this cycle until the cumulative irradiation time reaches 60 min.

[0052] The far-infrared wavelength is 30 μm, and the process conditions of the pulsed magnetic field are: magnetic field intensity 3 T, number of pulses 30, pulse interval 30 s; the processing time is 10 minutes.

[0053] Embodiment 2:

[0054] A method for preventing oxidative deterioration of pet feed, the specific steps are as follows:

[0055] (1) First, the following components were mixed to prepare mixed powder: 30 kg corn flour, 30 kg soybean meal, 15 kg wheat flour, 12 kg oat flour, 10 kg sorghum flour, and 7 kg seaweed flour; the particle size of each component was 100 μm;

[0056] (2) Mixing the fresh meat with water and grinding them to obtain meat slurry, heating the meat slurry to mature it, and naturally cooling it to room temperature (25° C.) to obtain mature meat slurry; chopping and grinding the vegetables to obtain vegetable slurry;

[0057] (3) then stirring and mixing the mixed powder with cooked meat slurry, vegetable slurry, mulberry leaf powder, and dark tea powder, adding a composite bacterial agent, and fermenting to obtain a fermentation product; the composite bacterial agent is obtained by mixing equal volumes of saccharomyces cerevisiae, Bacillus subtilis, Lactobacillus helveticus, and Propionibacterium;

[0058] (4) Finally, the fermentation product is pre-dried, granulated, and microwave-dried, and subjected to pulse magnetic field treatment under far-infrared conditions to obtain pet feed.

[0059] Wherein, in step (2), the amount of water used is 4 times the mass of fresh meat, and the fresh meat is obtained by mixing beef and fatty pork in a mass ratio of 1:0.7.

[0060] The process conditions for heating and aging are: heating to 100°C and keeping warm for 10 minutes.

[0061] Vegetables are a mixture of leafy vegetables (spinach), root vegetables (lotus root), melons and tomatoes (winter melon), mushrooms (shiitake mushrooms), etc.

[0062] In step (3), the mass ratio of the mixed powder, cooked meat slurry, vegetable slurry, mulberry leaf powder and dark tea powder is 30:40:15:9:7.

[0063] Mulberry leaf powder or dark tea powder is made from mulberry leaves or dark tea as raw materials, which are naturally air-dried and then crushed to a particle size of 200 μm.

[0064] The volume inoculation amount of the composite bacterial agent is 3%. In the composite bacterial agent, the effective viable counts of Saccharomyces cerevisiae, Bacillus subtilis, Lactobacillus helveticus, and Propionibacterium are 2×10 9 cfu / mL, 5×10 8 cfu / mL, 8×10 8 cfu / mL, 6×10 7 cfu / mL.

[0065] Fermentation conditions: fermentation at 37°C for 5 days.

[0066] In step (4), pre-drying is performed until the moisture content is 12% by weight and the granulation particle size is 8 mm.

[0067] The process conditions of microwave drying are as follows: power 700 W, microwave irradiation for 9 s, stop for 20 s, and repeat this cycle until the cumulative irradiation time reaches 70 min.

[0068] The far-infrared wavelength is 40 μm, and the process conditions of the pulsed magnetic field are: magnetic field intensity 5 T, number of pulses 50, pulse interval 30 s; the processing time is 15 minutes.

[0069] Embodiment 3:

[0070] A method for preventing oxidative deterioration of pet feed, the specific steps are as follows:

[0071] (1) First, the following components are mixed to prepare mixed powder: 25 kg corn flour, 30 kg soybean meal, 10 kg wheat flour, 12 kg oat flour, 8 kg sorghum flour, and 7 kg seaweed flour; the particle size of each component is 50 μm;

[0072] (2) Mixing the fresh meat with water and grinding them to obtain meat slurry, heating the meat slurry to mature it, and naturally cooling it to room temperature (25° C.) to obtain mature meat slurry; chopping and grinding the vegetables to obtain vegetable slurry;

[0073] (3) then stirring and mixing the mixed powder with cooked meat slurry, vegetable slurry, mulberry leaf powder, and dark tea powder, adding a composite bacterial agent, and fermenting to obtain a fermentation product; the composite bacterial agent is obtained by mixing equal volumes of saccharomyces cerevisiae, Bacillus subtilis, Lactobacillus helveticus, and Propionibacterium;

[0074] (4) Finally, the fermentation product is pre-dried, granulated, and microwave-dried, and subjected to pulse magnetic field treatment under far-infrared conditions to obtain pet feed.

[0075] Wherein, in step (2), the amount of water used is 4 times the mass of fresh meat, and the fresh meat is obtained by mixing fish meat and fatty pork in a mass ratio of 1:0.6.

[0076] The process conditions for heating and aging are: heating to 100°C and keeping warm for 10 minutes.

[0077] Vegetables are a mixture of leafy vegetables (rapeseed), root vegetables (yam), melons and tomatoes (eggplant), mushrooms (enoki mushroom), etc.

[0078] In step (3), the mass ratio of the mixed powder, cooked meat slurry, vegetable slurry, mulberry leaf powder and dark tea powder is 30:30:15:6:7.

[0079] Mulberry leaf powder or dark tea powder is made from mulberry leaves or dark tea as raw materials, which are naturally air-dried and then crushed to a particle size of 100 μm.

[0080] The volume inoculation amount of the composite bacterial agent is 3%. In the composite bacterial agent, the effective viable counts of Saccharomyces cerevisiae, Bacillus subtilis, Lactobacillus helveticus, and Propionibacterium are 2×10 9 cfu / mL, 5×10 8 cfu / mL, 8×10 8 cfu / mL, 6×10 7 cfu / mL.

[0081] Fermentation conditions: fermentation at 35°C for 5 days.

[0082] In step (4), pre-drying is performed until the moisture content is 10% by weight and the granulation particle size is 8 mm.

[0083] The process conditions of microwave drying are as follows: power 500 W, microwave irradiation for 9 s, stop for 15 s, and repeat this cycle until the cumulative irradiation time reaches 70 min.

[0084] The far-infrared wavelength is 35 μm, and the process conditions of the pulsed magnetic field are: magnetic field intensity 5 T, number of pulses 30, pulse interval 30 s; the processing time is 15 minutes.

[0085] Embodiment 4:

[0086] A method for preventing oxidative deterioration of pet feed, the specific steps are as follows:

[0087] (1) First, the following components were mixed to prepare mixed powder: 27 kg corn flour, 28 kg soybean meal, 12 kg wheat flour, 11 kg oat flour, 9 kg sorghum flour, and 6 kg seaweed flour; the particle size of each component was 70 μm;

[0088] (2) Mixing the fresh meat with water and grinding them to obtain meat slurry, heating the meat slurry to mature it, and naturally cooling it to room temperature (25° C.) to obtain mature meat slurry; chopping and grinding the vegetables to obtain vegetable slurry;

[0089] (3) then stirring and mixing the mixed powder with cooked meat slurry, vegetable slurry, mulberry leaf powder, and dark tea powder, adding a composite bacterial agent, and fermenting to obtain a fermentation product; the composite bacterial agent is obtained by mixing equal volumes of saccharomyces cerevisiae, Bacillus subtilis, Lactobacillus helveticus, and Propionibacterium;

[0090] (4) Finally, the fermentation product is pre-dried, granulated, and microwave-dried, and subjected to pulse magnetic field treatment under far-infrared conditions to obtain pet feed.

[0091] In step (2), the amount of water used is 3 times the mass of fresh meat, and the fresh meat is obtained by mixing lean pork, chicken and fat pork in a mass ratio of 0.5:0.5:0.65.

[0092] The process conditions for heating and aging are: heating to 100°C and keeping warm for 10 minutes.

[0093] Vegetables are a mixture of leafy vegetables (cabbage), root vegetables (potatoes), melons and tomatoes (pumpkins), mushrooms (shiitake mushrooms), etc.

[0094] In step (3), the mass ratio of the mixed powder, cooked meat slurry, vegetable slurry, mulberry leaf powder and dark tea powder is 25:35:12:8:6.

[0095] Mulberry leaf powder or dark tea powder is made from mulberry leaves or dark tea as raw materials, which are naturally air-dried and then crushed to a particle size of 200 μm.

[0096] The volume inoculation amount of the composite bacterial agent is 2.5%. In the composite bacterial agent, the effective viable counts of Saccharomyces cerevisiae, Bacillus subtilis, Lactobacillus helveticus, and Propionibacterium are 2×10 9 cfu / mL, 5×10 8 cfu / mL, 8×10 8cfu / mL, 6×10 7 cfu / mL.

[0097] Fermentation conditions: fermentation at 36°C for 4 days.

[0098] In step (4), pre-drying is performed to a moisture content of 11% by weight and a granulation particle size of 7 mm.

[0099] The process conditions of microwave drying are as follows: power 600 W, microwave irradiation 8 s, stop 17 s, and repeat this cycle until the cumulative irradiation time reaches 65 minutes.

[0100] The far-infrared wavelength is 35 μm, and the process conditions of the pulsed magnetic field are: magnetic field intensity 4 T, number of pulses 40, pulse interval 30 s; the processing time is 13 minutes.

[0101] Comparative Example 1

[0102] A method for preparing pet feed, the specific steps are as follows:

[0103] (1) First, the following components are mixed to prepare mixed powder: 25 kg corn flour, 25 kg soybean meal, 10 kg wheat flour, 10 kg oat flour, 8 kg sorghum flour, and 5 kg seaweed flour; the particle size of each component is 50 μm;

[0104] (2) Mixing the fresh meat with water and grinding them to obtain meat slurry, heating the meat slurry to mature it, and naturally cooling it to room temperature (25° C.) to obtain mature meat slurry; chopping and grinding the vegetables to obtain vegetable slurry;

[0105] (3) then stirring and mixing the mixed powder with cooked meat slurry, vegetable slurry, and mulberry leaf powder, adding a composite bacterial agent, and fermenting to obtain a fermentation product; the composite bacterial agent is obtained by mixing equal volumes of saccharomyces cerevisiae, Bacillus subtilis, Lactobacillus helveticus, and Propionibacterium;

[0106] (4) Finally, the fermentation product is pre-dried, granulated, and microwave-dried, and subjected to pulse magnetic field treatment under far-infrared conditions to obtain pet feed.

[0107] Wherein, in step (2), the amount of water used is 3 times the mass of fresh meat, and the fresh meat is obtained by mixing lean pork and fat pork in a mass ratio of 1:0.6.

[0108] The process conditions for heating and aging are: heating to 100°C and keeping warm for 10 minutes.

[0109] Vegetables are a mixture of leafy vegetables (cabbage), root vegetables (carrots), melons and tomatoes (pumpkins), mushrooms (oyster mushrooms), etc.

[0110] In step (3), the mass ratio of the mixed powder, cooked meat slurry, vegetable slurry and mulberry leaf powder is 20:30:10:6.

[0111] Mulberry leaf powder is made from mulberry leaves, which are naturally air-dried and then crushed to a particle size of 100μm.

[0112] The volume inoculation amount of the composite bacterial agent is 2%. In the composite bacterial agent, the effective viable counts of Saccharomyces cerevisiae, Bacillus subtilis, Lactobacillus helveticus, and Propionibacterium are 2×10 9 cfu / mL, 5×10 8 cfu / mL, 8×10 8 cfu / mL, 6×10 7 cfu / mL.

[0113] Fermentation conditions: fermentation at 35°C for 3 days.

[0114] In step (4), pre-drying is performed until the moisture content is 10% by weight and the granulation particle size is 6 mm.

[0115] The process conditions of microwave drying are as follows: power 500 W, microwave irradiation for 6 s, stop for 15 s, and repeat this cycle until the cumulative irradiation time reaches 60 min.

[0116] The far-infrared wavelength is 30 μm, and the process conditions of the pulsed magnetic field are: magnetic field intensity 3 T, number of pulses 30, pulse interval 30 s; the processing time is 10 minutes.

[0117] Comparative Example 2

[0118] A method for preparing pet feed, the specific steps are as follows:

[0119] (1) First, the following components are mixed to prepare mixed powder: 25 kg corn flour, 25 kg soybean meal, 10 kg wheat flour, 10 kg oat flour, 8 kg sorghum flour, and 5 kg seaweed flour; the particle size of each component is 50 μm;

[0120] (2) Mixing the fresh meat with water and grinding them to obtain meat slurry, heating the meat slurry to mature it, and naturally cooling it to room temperature (25° C.) to obtain mature meat slurry; chopping and grinding the vegetables to obtain vegetable slurry;

[0121] (3) then stirring and mixing the mixed powder with cooked meat slurry, vegetable slurry, mulberry leaf powder, and dark tea powder, adding a composite bacterial agent, and fermenting to obtain a fermentation product; the composite bacterial agent is obtained by mixing equal volumes of saccharomyces cerevisiae, Bacillus subtilis, and Lactobacillus helveticus;

[0122] (4) Finally, the fermentation product is pre-dried, granulated, and microwave-dried, and subjected to pulse magnetic field treatment under far-infrared conditions to obtain pet feed.

[0123] Wherein, in step (2), the amount of water used is 3 times the mass of fresh meat, and the fresh meat is obtained by mixing lean pork and fat pork in a mass ratio of 1:0.6.

[0124] The process conditions for heating and aging are: heating to 100°C and keeping warm for 10 minutes.

[0125] Vegetables are a mixture of leafy vegetables (cabbage), root vegetables (carrots), melons and tomatoes (pumpkins), mushrooms (oyster mushrooms), etc.

[0126] In step (3), the mass ratio of the mixed powder, cooked meat slurry, vegetable slurry, mulberry leaf powder and dark tea powder is 20:30:10:6:5.

[0127] Mulberry leaf powder or dark tea powder is made from mulberry leaves or dark tea as raw materials, which are naturally air-dried and then crushed to a particle size of 100 μm.

[0128] The volume inoculation amount of the composite bacterial agent is 2%. In the composite bacterial agent, the effective viable counts of Saccharomyces cerevisiae, Bacillus subtilis, and Lactobacillus helveticus are 2×10 9 cfu / mL, 5×10 8 cfu / mL, 8×10 8 cfu / mL.

[0129] Fermentation conditions: fermentation at 35°C for 3 days.

[0130] In step (4), pre-drying is performed until the moisture content is 10% by weight and the granulation particle size is 6 mm.

[0131] The process conditions of microwave drying are as follows: power 500 W, microwave irradiation for 6 s, stop for 15 s, and repeat this cycle until the cumulative irradiation time reaches 60 min.

[0132] The far-infrared wavelength is 30 μm, and the process conditions of the pulsed magnetic field are: magnetic field intensity 3 T, number of pulses 30, pulse interval 30 s; the processing time is 10 minutes.

[0133] Comparative Example 3

[0134] A method for preparing pet feed, the specific steps are as follows:

[0135] (1) First, the following components are mixed to prepare mixed powder: 25 kg corn flour, 25 kg soybean meal, 10 kg wheat flour, 10 kg oat flour, 8 kg sorghum flour, and 5 kg seaweed flour; the particle size of each component is 50 μm;

[0136] (2) Mixing the fresh meat with water and grinding them to obtain meat slurry, heating the meat slurry to mature it, and naturally cooling it to room temperature (25° C.) to obtain mature meat slurry; chopping and grinding the vegetables to obtain vegetable slurry;

[0137] (3) then stirring and mixing the mixed powder with cooked meat slurry, vegetable slurry, mulberry leaf powder, and dark tea powder, adding a composite bacterial agent, and fermenting to obtain a fermentation product; the composite bacterial agent is obtained by mixing equal volumes of saccharomyces cerevisiae, Bacillus subtilis, Lactobacillus helveticus, and Propionibacterium;

[0138] (4) Finally, the fermentation product is pre-dried, granulated, microwave dried, and treated with a pulsed magnetic field to obtain pet feed.

[0139] Wherein, in step (2), the amount of water used is 3 times the mass of fresh meat, and the fresh meat is obtained by mixing lean pork and fat pork in a mass ratio of 1:0.6.

[0140] The process conditions for heating and aging are: heating to 100°C and keeping warm for 10 minutes.

[0141] Vegetables are a mixture of leafy vegetables (cabbage), root vegetables (carrots), melons and tomatoes (pumpkins), mushrooms (oyster mushrooms), etc.

[0142] In step (3), the mass ratio of the mixed powder, cooked meat slurry, vegetable slurry, mulberry leaf powder and dark tea powder is 20:30:10:6:5.

[0143] Mulberry leaf powder or dark tea powder is made from mulberry leaves or dark tea as raw materials, which are naturally air-dried and then crushed to a particle size of 100 μm.

[0144] The volume inoculation amount of the composite bacterial agent is 2%. In the composite bacterial agent, the effective viable counts of Saccharomyces cerevisiae, Bacillus subtilis, Lactobacillus helveticus, and Propionibacterium are 2×10 9 cfu / mL, 5×10 8 cfu / mL, 8×10 8 cfu / mL, 6×10 7 cfu / mL.

[0145] Fermentation conditions: fermentation at 35°C for 3 days.

[0146] In step (4), pre-drying is performed until the moisture content is 10% by weight and the granulation particle size is 6 mm.

[0147] The process conditions of microwave drying are as follows: power 500 W, microwave irradiation for 6 s, stop for 15 s, and repeat this cycle until the cumulative irradiation time reaches 60 min.

[0148] The process conditions of the pulsed magnetic field are: magnetic field intensity 3T, number of pulses 30, pulse interval 30s; processing time is 10 minutes.

[0149] Comparative Example 4

[0150] A method for preparing pet feed, the specific steps are as follows:

[0151] (1) First, the following components are mixed to prepare mixed powder: 25 kg corn flour, 25 kg soybean meal, 10 kg wheat flour, 10 kg oat flour, 8 kg sorghum flour, and 5 kg seaweed flour; the particle size of each component is 50 μm;

[0152] (2) Mixing the fresh meat with water and grinding them to obtain meat slurry, heating the meat slurry to mature it, and naturally cooling it to room temperature (25° C.) to obtain mature meat slurry; chopping and grinding the vegetables to obtain vegetable slurry;

[0153] (3) then stirring and mixing the mixed powder with cooked meat slurry, vegetable slurry, mulberry leaf powder, and dark tea powder, adding a composite bacterial agent, and fermenting to obtain a fermentation product; the composite bacterial agent is obtained by mixing equal volumes of saccharomyces cerevisiae, Bacillus subtilis, Lactobacillus helveticus, and Propionibacterium;

[0154] (4) Finally, the fermentation product is pre-dried, granulated, microwave dried, and far-infrared treated to obtain pet feed.

[0155] Wherein, in step (2), the amount of water used is 3 times the mass of fresh meat, and the fresh meat is obtained by mixing lean pork and fat pork in a mass ratio of 1:0.6.

[0156] The process conditions for heating and aging are: heating to 100°C and keeping warm for 10 minutes.

[0157] Vegetables are a mixture of leafy vegetables (cabbage), root vegetables (carrots), melons and tomatoes (pumpkins), mushrooms (oyster mushrooms), etc.

[0158] In step (3), the mass ratio of the mixed powder, cooked meat slurry, vegetable slurry, mulberry leaf powder and dark tea powder is 20:30:10:6:5.

[0159] Mulberry leaf powder or dark tea powder is made from mulberry leaves or dark tea as raw materials, which are naturally air-dried and then crushed to a particle size of 100 μm.

[0160] The volume inoculation amount of the composite bacterial agent is 2%. In the composite bacterial agent, the effective viable counts of Saccharomyces cerevisiae, Bacillus subtilis, Lactobacillus helveticus, and Propionibacterium are 2×10 9 cfu / mL, 5×10 8 cfu / mL, 8×10 8 cfu / mL, 6×10 7 cfu / mL.

[0161] Fermentation conditions: fermentation at 35°C for 3 days.

[0162] In step (4), pre-drying is performed until the moisture content is 10% by weight and the granulation particle size is 6 mm.

[0163] The process conditions of microwave drying are as follows: power 500 W, microwave irradiation for 6 s, stop for 15 s, and repeat this cycle until the cumulative irradiation time reaches 60 min.

[0164] The far-infrared treatment conditions are as follows: the far-infrared wavelength is 30 μm, and the treatment time is 10 minutes.

[0165] Test example

[0166] 10 g of each of the pet food obtained in Examples 1 to 4 and Comparative Examples 1 to 4 were taken, placed in a 100 mL beaker, exposed to air, and left to stand for 6 months and 8 months, and the weight gain data were recorded (0 month was taken as the initial weight), and the appearance change was visually observed, and the odor change was examined. The results are shown in Table 1.

[0167] Table 1. Pet food stability study

[0168]

[0169]

[0170] As shown in Table 1, the pet food obtained in Examples 1 to 4 did not gain significant weight after being exposed to air for 8 months, had good moisture resistance, and had almost no change in appearance and odor after 8 months, indicating that oxidative deterioration was effectively avoided, the stability was good, and the storage time was increased.

[0171] Comparative Example 1 omitted black tea powder, the composite bacterial agent of Comparative Example 2 omitted Propionibacterium, Comparative Example 3 omitted far infrared conditions, and Comparative Example 4 omitted pulse magnetic field treatment. The weight gain in 6 months was significantly higher, indicating that the moisture resistance was poor, and the appearance and smell changed, indicating that oxidation deterioration occurred and the storage resistance was poor. In the present invention, mulberry leaf powder, black tea powder, etc. work synergistically, and combined with the specific composite bacterial agent fermentation and the subsequent far infrared conditions, pulse magnetic field treatment, etc., the stability of pet feed is effectively improved and oxidation deterioration is avoided.

[0172] Although the above describes the specific implementation methods of the present invention, it does not limit the scope of protection of the present invention. Based on the technical solution of the present invention, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the present invention.

Claims

1. A method for preventing oxidative deterioration of pet feed, characterized in that: The specific steps are as follows: (1) First, mix the following components by weight to prepare a mixed powder: 25-30 parts of corn flour, 25-30 parts of soybean meal, 10-15 parts of wheat flour, 10-12 parts of oat flour, 8-10 parts of sorghum flour, and 5-7 parts of seaweed powder; (2) mixing the fresh meat with water and grinding it to obtain meat slurry, heating the meat slurry to mature it, and naturally cooling it to room temperature to obtain mature meat slurry; chopping and grinding the vegetables to obtain vegetable slurry; (3) then stirring and mixing the mixed powder with cooked meat slurry, vegetable slurry, mulberry leaf powder, and dark tea powder, adding a composite bacterial agent, and fermenting to obtain a fermentation product; the composite bacterial agent is obtained by mixing equal volumes of saccharomyces cerevisiae, Bacillus subtilis, Lactobacillus helveticus, and Propionibacterium; (4) Finally, the fermentation product is pre-dried, granulated, and microwave-dried, and subjected to pulse magnetic field treatment under far-infrared conditions to obtain pet feed.

2. The method according to claim 1, characterized in that In step (1), the particle size of each component is 50 to 100 μm.

3. The method according to claim 1, characterized in that In step (2), the amount of water used is 3 to 4 times the mass of the fresh meat, wherein the fresh meat is obtained by mixing any one or more of lean pork, beef, mutton, chicken, and fish with fat pork in a mass ratio of 1:0.6 to 0.

7.

4. The method according to claim 1, characterized in that: In step (2), the heating and aging process conditions are: heating to 100° C. and keeping warm for 10 minutes.

5. The method according to claim 1, characterized in that In step (2), the vegetables are obtained by mixing leafy vegetables, root vegetables, melons and tomatoes, mushrooms, etc.

6. The method according to claim 1, characterized in that In step (3), the mass ratio of the mixed powder, cooked meat slurry, vegetable slurry, mulberry leaf powder and dark tea powder is 20-30:30-40:10-15:6-9:5-7.

7. The method according to claim 1, characterized in that In step (3), the mulberry leaf powder or dark tea powder is obtained by using mulberry leaves or dark tea as raw materials, naturally drying them, and then crushing them into particles with a diameter of 100 to 200 μm.

8. The method according to claim 1, characterized in that: In step (3), the volume inoculation amount of the composite bacterial agent is 2-3%; in the composite bacterial agent, the effective viable counts of Saccharomyces cerevisiae, Bacillus subtilis, Lactobacillus helveticus, and Propionibacterium are 2×10 9 cfu / mL, 5×10 8 cfu / mL, 8×10 8 cfu / mL, 6×10 7 cfu / mL; Fermentation conditions: fermentation at 35-37°C for 3-5 days.

9. The method according to claim 1, characterized in that: In step (4), pre-drying is performed until the moisture content is 10-12% by weight and the granulation particle size is 6-8 mm; The process conditions of microwave drying are: power 500-700 W, microwave irradiation for 6-9 s, stop for 15-20 s, and repeat this cycle until the cumulative irradiation time is 60-70 minutes.

10. The method according to claim 1, characterized in that In step (4), the far-infrared wavelength is 30-40 μm, and the process conditions of the pulsed magnetic field are: magnetic field intensity 3-5 T, number of pulses 30-50, pulse interval 30 s; and the processing time is 10-15 minutes.

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