Method for harmless resourceful treatment of slaughtered pig stomach contents by animal abdomen passing and application

Abstract

The invention belongs to the technical field of slaughtering waste utilization, and particularly relates to a method for harmless resourceful treatment of slaughtering pig stomach contents through animal abdomen passing and application. According to the invention, omnivorous and herbivorous fishes are used as abdominal carriers, resource harmless treatment of slaughtered pig stomach contents is realized, and after the pig stomach contents are treated by the abdominal animal carrier, animal products with balanced nutrition can be obtained and have the advantages of high protein, fat and bioactive substances; the slaughtered pig stomach content can be used as a high-quality food or raw material source in the fields of breeding animals, feed, food, medicines and the like, the additional value of resourceful treatment is improved, and the slaughtered pig stomach content animal abdomen passing carrier and planting and breeding circulation system has the characteristics of renewable resources, low cost, no secondary pollution and applicability, is favorable for expanding the agricultural industry chain, and has wide application prospects. The method promotes industrial transformation and upgrading development, improves biological efficient cyclic utilization of resources, reduces environmental ecological risks, guarantees national food safety, and creates and increases income.

Description

Technical Field

[0001] The invention belongs to the technical field of slaughter waste utilization, and specifically relates to a method and application of harmless resource treatment of slaughtered pig stomach contents by utilizing animal stomach passage. Background Art

[0002] With the large-scale development of the livestock and poultry slaughtering industry, the total amount of waste (such as blood, viscera, bones, fur, etc.) generated each year has exceeded 100 million tons. Its high organic matter content and potential pathogen pollution characteristics have led to traditional landfill, incineration and other treatment methods facing multiple challenges such as high environmental pollution risks, serious waste of resources, and rising economic costs.

[0003] Existing chemical conversion methods, such as using chemical reagents to decompose waste, are costly and carry the risk of secondary pollution. Existing biological methods, such as using black soldier flies to treat food waste, show potential, but have low conversion efficiency when used directly on slaughterhouse waste, require additional ingredients for adjustment, and lack effective resource recycling. There is an urgent need for an environmentally friendly, cost-effective, and resource-efficient treatment technology that can address the ecological and environmental risks associated with slaughterhouse waste (such as excessive ammonia nitrogen and pathogen transmission) while also increasing the added value of the industry chain through high-value products (such as feed protein and biodiesel feedstock). Summary of the Invention

[0004] In view of the above problems, the purpose of the present invention is to provide a method and application for harmlessly recycling the stomach contents of slaughtered pigs by animal transabdominal treatment.

[0005] The technical contents of the present invention are as follows: The present invention provides a method for harmlessly recycling the stomach contents of slaughtered pigs by utilizing animal stomach passage, comprising the following steps: 1) Anaerobic fermentation of the stomach contents of slaughtered pigs is performed, followed by solid-liquid separation to obtain a solid residue and liquid of the stomach contents with low pH, high sugar content, and small peptide content; The anaerobic fermentation process is as follows: after uniformly mixing the contents of the slaughtered pig stomach with molasses, inoculating lactobacillus, Bacillus subtilis and cellulase, vacuuming, and fermenting at room temperature of 20-30° C. for 15-20 days; The mass ratio of the contents of the slaughtered pig stomach to molasses is (80-90): (10-20); The inoculated lactobacilli are ≥3×10 8 CFU / mL, Bacillus subtilis ≥3×10 8 CFU / mL, cellulase ≥10 3 U / mL; 2) Adjusting the pH of the separated solid residue from the pig stomach to 6-8, sterilizing the solid residue and liquid and setting aside for later use; 3) The sterilized and dried solid residue of the slaughtered pig stomach contents is mixed with an appropriate amount of other energy substances and functional additives, and then mixed with the sterilized liquid residue of the slaughtered pig stomach contents to form a nutritionally balanced compound, which is then extruded and granulated and then dried to obtain pellets containing the slaughtered pig stomach contents; The mixing mass ratio of the solid residue of the slaughtered pig stomach contents to other materials is (10-30): (70-90); 4) Feeding the prepared pellets to aquaculture animals, and after the aquaculture animals are processed, the aquaculture animals are mainly used to feed the aquaculture animals, and other filter-feeding animals are combined to build pond bases and biological floating beds to produce animal products; The aquaculture animals include omnivorous and herbivorous fish, specifically grass carp, tilapia, etc. The other filter-feeding animals include silver carp and bighead carp; Based on the principles of integrated breeding and multi-trophic level farming, an efficient breeding and farming system is established to recycle the contents of slaughtered pig stomachs; 5) Extract proteins, oils and other substances produced by aquatic animals and other filter-feeding animals for use as feed.

[0006] The beneficial effects of the present invention are as follows: The method of the present invention utilizes the stomach contents of slaughtered pigs for harmless resource treatment by animal stomach passage, and utilizes the stomach contents of slaughtered pigs for harmless resource treatment, uses omnivorous and herbivorous fish as stomach passage carriers, realizes the harmless resource treatment of the stomach contents of slaughtered pigs, improves resource utilization, and increases added value; reduces emission pollution, reduces treatment costs, and improves treatment efficiency; enhances the ability to resist resource-limiting risks; complies with the national resource conservation and ecological green development strategy; and further implements the concept of recycling and resource treatment of wastes in breeding and farming. Specifically, the stomach contents of slaughtered pigs are rich in organic matter, especially carbohydrates and proteins. Direct discharge of them will cause great pollution to the environment and will also cause serious damage to resources. Heavy waste, by constructing a through-belly animal carrier and an efficient breeding and farming cycle system, not only can resource utilization be improved, but also processing costs can be reduced and processing efficiency can be improved; after the pig stomach contents are processed by the through-belly animal carrier, nutritionally balanced animal products can be obtained, which have the advantages of high protein, fat, and bioactive substances, and can be used as a high-quality food or raw material source in the fields of farmed animals, feed, food, medicine, etc., the added value of resource processing is increased, and the ability to resist resource-limiting risks is enhanced; constructing a comprehensive breeding and multi-nutritional level slaughter pig stomach content processing system can significantly reduce the processing cost of slaughter pig stomach contents, which is in line with the national resource conservation and ecological green development strategy. The slaughter pig stomach content animal through-belly carrier and breeding and farming cycle system of the present invention have the characteristics of renewable resources, low cost, no secondary pollution, and applicability. Slaughterhouses and meat processing plants can use the present invention to accelerate the integration of multiple professions and industries, expand the agricultural industry chain, promote industrial transformation and upgrading, improve the efficient recycling of biological resources, reduce environmental and ecological risks, and at the same time, ensure national food security and increase income. DETAILED DESCRIPTION

[0007] The present invention is further described in detail below through specific implementation cases. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of protection of the present invention. After reading the present invention, various equivalent modifications of the present invention by those skilled in the art are all within the scope of the claims attached to this application.

[0008] Unless otherwise specified, all raw materials and reagents in the present invention are raw materials and reagents from conventional markets.

[0009] Example 1 A method for harmlessly processing the stomach contents of slaughtered pigs by utilizing animal stomach contents 1) Take the stomach contents of slaughtered pigs for anaerobic fermentation, mix with molasses in a ratio of 85:15, and inoculate ≥3×10 Lactobacillus per mL 8 CFU, Bacillus subtilis ≥3×10 8 CFU, cellulase ≥10 3U, after vacuuming, fermented at room temperature of 25℃ for 18 days, and then solid-liquid separation was performed to obtain pig stomach contents solid residue and liquid with low pH (3.5-4.5), high sugar (reducing sugar 5.0-7.0 mg / g), and small peptide (60-80 mg / g) content; 2) Adjusting the pH of the separated solid residue from the pig stomach to 6-8, sterilizing the solid residue and liquid and setting aside for later use; 3) The sterilized and dried solid residue of the slaughtered pig stomach contents is mixed with an appropriate amount of other energy substances and functional additives, and then mixed with the sterilized liquid residue of the slaughtered pig stomach contents to form a nutritionally balanced compound, which is then extruded and granulated and then dried to obtain pellets containing the slaughtered pig stomach contents; 4) Feeding the prepared pellets to aquaculture animals, mainly tilapia and grass carp, and other filter-feeding animals such as silver carp and bighead carp. After the stomach is processed, pond base and biological floating bed are constructed to produce animal products, thus realizing the harmless biological utilization of the stomach contents of slaughtered pigs and increasing added value; Based on the principles of integrated breeding and multi-trophic level farming, an efficient breeding and farming system is established to recycle the contents of slaughtered pig stomachs; The aquaculture animals include omnivorous and herbivorous fish, specifically grass carp, tilapia, etc. 5) Extract proteins, oils and other substances produced by aquatic animals and other filter-feeding animals for use as feed.

[0010] Example 2 A method for harmlessly processing the stomach contents of slaughtered pigs by utilizing animal stomach contents 1) Take the stomach contents of slaughtered pigs for anaerobic fermentation, mix with molasses in a ratio of 80:10, and inoculate ≥3×10 Lactobacillus per mL 8 CFU, Bacillus subtilis ≥3×10 8 CFU, cellulase ≥10 3 U, after vacuuming, fermented at room temperature of 20℃ for 20 days, and then solid-liquid separation was performed to obtain pig stomach contents solid residue and liquid with low pH, high sugar and small peptide content; Other steps are the same as in Example 1.

[0011] Example 3 A method for harmlessly processing the stomach contents of slaughtered pigs by utilizing animal stomach contents 1) Take the stomach contents of slaughtered pigs for anaerobic fermentation, mix with molasses in a ratio of 90:20, and inoculate ≥3×10 Lactobacillus per mL 8 CFU, Bacillus subtilis ≥3×10 8 CFU, cellulase ≥10 3U, after vacuuming, fermented at room temperature 30℃ for 15 days, and then solid-liquid separation was performed to obtain pig stomach contents solid residue and liquid with low pH, high sugar and small peptide content; Other steps are the same as in Example 1.

[0012] The sterilized and dried solid residue of the stomach contents of slaughtered pigs is mixed with other substances (as shown in Table 1) and then mixed with the sterilized liquid contents of slaughtered pigs to form a nutritionally balanced compound. The compound is extruded and granulated and then dried to obtain pellets containing the stomach contents of slaughtered pigs. The prepared pellets are fed to aquaculture animals, mainly tilapia, and other filter-feeding animals such as silver carp and bighead carp. After stomach processing, pond bases and biological floating beds are constructed to produce animal products, thereby realizing the harmless biological utilization of the stomach contents of slaughtered pigs. The following control design and experimental testing are carried out:

[0013] 1) Experimental design Table 1 Experimental design for resource utilization of tilapia (dry matter basis, %)

[0014] Note: Other substances are commonly used feed ingredients including but not limited to 25-35% soybean meal, 20-30% rapeseed meal, 4-8% peanut bran, 4-24% corn starch, 6-12% high-refined flour, 3.0-5.0% soybean oil, 0.5-1.5% soybean lecithin, 1.2-1.8% calcium hydrogen phosphate, 0.18-0.22% choline chloride, and 0.8-1.2% compound premix; in Table 1, 32% soybean meal, 26% rapeseed meal, 6% peanut bran, 18% corn starch, 10% high-refined flour, 4% soybean oil, 1.3% soybean lecithin, 1.5% calcium hydrogen phosphate, 0.2% choline chloride, and 1% compound premix are preferred.

[0015] In Table 1, the solid residue of the stomach contents of slaughtered pigs and the liquid of the stomach contents of slaughtered pigs obtained in Example 1 were used to replace the corn flour in the tilapia feed.

[0016] In addition, a group T6 was set up: the unfermented contents of pig stomachs were taken, and after solid-liquid separation, 10% of the solid residue of the pig stomach contents and 10% of the liquid of the pig stomach contents were used to replace 20% of the corn flour in the tilapia feed.

[0017] 2. Test results Table 2 Effects of pig stomach contents on the growth performance of tilapia

[0018] As shown in Table 2, the fermented pig stomach contents of the present invention can completely replace corn flour in tilapia feed, and the weight gain rate is significantly higher than that of the control group (p < 0.05), and there is no significant effect on survival rate, feed conversion rate, etc. (p > 0.05). However, the unfermented pig stomach contents have a weaker effect on tilapia growth and may even have a negative impact.

[0019] Table 3 Effects of pig stomach contents on whole tilapia composition (dry matter basis, %)

[0020] As shown in Table 3, the fermented pig stomach contents of the present invention can completely replace cornmeal in tilapia feed, with no significant effect on the composition of the whole tilapia (p>0.05). Furthermore, replacing cornmeal with unfermented pig stomach contents had no significant adverse effect on the body composition of tilapia, which remained stable.

[0021] Table 4 Effects of pig stomach contents on nutrient digestibility of tilapia feed (dry matter basis, %)

[0022] As shown in Table 4, the fermented pig stomach contents of the present invention completely replaced corn flour in tilapia feed, with no significant effect on the digestibility of nutrients in the tilapia feed (p>0.05). However, the unfermented pig stomach contents resulted in slightly lower digestion and absorption efficiency of nutrients in the tilapia.

[0023] The above test results are summarized, which show that the contents of the pig stomach of the present invention can completely replace the corn flour in tilapia feed without reducing the growth performance of tilapia and the digestibility and utilization rate of feed nutrients, and without affecting the whole body composition of tilapia. Therefore, the contents of the pig stomach can be processed through the stomach of tilapia to produce fish meal and fish oil, which are restricted raw materials required by the feed industry. Compared with traditional processing technologies, the processing of the pig stomach contents through the stomach of tilapia can greatly reduce the dependence on space, resources (water, soil, electricity, energy consumption), etc., shorten the processing cycle, and improve the processing efficiency. The added value after processing is increased. Therefore, the economic, social and ecological significance of processing the pig stomach contents through the stomach of tilapia is obvious.

Claims

1. A method for harmlessly recycling the stomach contents of slaughtered pigs by utilizing animal stomach-transit, characterized in that: The steps include: 1) Anaerobic fermentation of the stomach contents of slaughtered pigs is performed, followed by solid-liquid separation to obtain a solid residue and liquid of the stomach contents with low pH, high sugar content, and small peptide content; 2) Adjusting the pH of the separated solid residue from the pig stomach to 6-8, sterilizing the solid residue and liquid and setting aside for later use; 3) The sterilized, dried solid residue of the slaughtered pig stomach contents is mixed with other materials and then mixed with the sterilized liquid residue of the slaughtered pig stomach contents to form a nutritionally balanced compound, which is then extruded and granulated and then dried to obtain pellets containing the slaughtered pig stomach contents; 4) Feeding the prepared pellets to aquaculture animals, and after the aquaculture animals are processed, the aquaculture animals are mainly used to feed the aquaculture animals, and other filter-feeding animals are combined to build pond bases and biological floating beds to produce animal products; 5) Extract proteins, oils and other substances produced by aquatic animals and other filter-feeding animals for use as feed.

2. The method for harmlessly recycling the stomach contents of slaughtered pigs by utilizing animal stomach passage according to claim 1, characterized in that: Step 1) The anaerobic fermentation operation is as follows: after uniformly mixing the contents of the slaughtered pig stomach with molasses, inoculating lactobacillus, Bacillus subtilis and cellulase, vacuuming, and fermenting at room temperature of 20-30° C. for 15-20 days.

3. The method for harmlessly recycling the stomach contents of slaughtered pigs by utilizing animal stomach passage according to claim 2, characterized in that: The mixing mass ratio of the slaughtered pig stomach contents to the molasses is (80-90):(10-20).

4. The method for harmlessly recycling the stomach contents of slaughtered pigs by utilizing animal stomach passage according to claim 2, characterized in that: The inoculated lactobacilli are ≥3×10 8 CFU / mL, Bacillus subtilis ≥3×10 8 CFU / mL, cellulase ≥10 3 U / mL.

5. The method for harmlessly recycling the stomach contents of slaughtered pigs by utilizing animal stomach ingestion according to claim 1, characterized in that: Step 3) The mixing mass ratio of the solid residue of the slaughtered pig stomach contents to other materials is (10-30): (70-90).

6. The method for harmlessly recycling the stomach contents of slaughtered pigs by utilizing animal stomach passage according to claim 1, characterized in that: The aquaculture animals include omnivorous and herbivorous fish.

7. The method for harmlessly recycling the stomach contents of slaughtered pigs by utilizing animal stomach passage according to claim 6, characterized in that: The aquaculture animals include grass carp and tilapia.

8. The method for harmlessly recycling the stomach contents of slaughtered pigs by utilizing animal transgastric feeding according to claim 1, wherein the other filter-feeding animals include silver carp and bighead carp.

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