What are the methods of harmless treatment of animals?

1. Burying method: refers to the method of burying animal carcasses, products and other related articles, and achieving harmlessness through soil self-purification. At present, deep burial method is a common practice for small livestock and poultry farms in most parts of China to deal with dead animals. The deep burying method is simple in operation, low in cost and free from peculiar smell. However, with the strengthening of people's awareness of environmental protection, land resources are becoming more and more scarce, and it is becoming more and more difficult to find suitable buried sites. Once the location, depth and method of deep burial are unscientific, it will not only have no effect, but also cause the spread of diseases and pollute underground water sources.

2. Incineration method: it is a treatment method of putting animal carcasses into an incinerator or burning and carbonizing them in other ways. Usually, when serious infectious diseases occur in farms, the state forces this method, which is the most thorough method for harmless treatment of dead animals. The advantages of this method are that it can completely kill pathogenic microorganisms and has good disinfection and sterilization effect; The disadvantage is that the smell is bad during incineration, which will pollute the air and require a high sense of responsibility of the operators.

3. Disposal method of corpse pit: A corpse pit refers to a sealed pool made of brick and concrete after the pit is dug on the ground. Corpse pit treatment is a method of putting dead animals into it and rotting with time. Usually, a microbial agent for decomposing carcasses is added in the treatment process to accelerate the decomposition of livestock and poultry carcasses, kill all pathogens except Bacillus, eliminate odor, and greatly improve the use efficiency of corpse cellars. The invention is suitable for the harmless treatment of a large number of livestock and poultry carcasses in farms and rural centralized treatment places. The advantages of this method are less facility investment, low operating cost, simple operation, closed facilities, no odor leakage, no pollution to the surrounding environment and long service life. The disadvantage is that it can't be recycled, but can only be used, sealed and recycled; The degradation process of corpse pits is greatly influenced by seasonal and regional temperatures, and poor sealing is easy to spread diseases.

4. Chemical method: that is, high-temperature humidification method refers to the process in which animal carcasses are dissolved in sterile solution and dry bone residue under the action of high temperature and high pressure by introducing high-temperature saturated steam into the container interlayer or container, and all pathogenic microorganisms are completely killed at the same time. The chemical method has the advantages of simple operation, strong treatment capacity, good sterilization effect and short treatment period. However, the disadvantage is that malodorous gas is easily generated in the treatment process and needs further treatment. The equipment will be equipped with a deodorizer to treat waste gas reasonably. This method is suitable for the harmless treatment of livestock and poultry in central cities, and can also be used for the harmless treatment of dead animals and animal products in farms, slaughterhouses, laboratories, harmless treatment plants and food processing plants. Recommend a more reasonable treatment.

5. Biodegradation method: refers to the process of crushing, degrading and sterilizing animal carcasses by putting them into a degradation reactor and using the principle of microbial fermentation and degradation. Its principle is to ferment and decompose the corpse by means of bio-heat, so as to achieve the purpose of reduction and harmless treatment. It is a new technology for harmless treatment of dead animals and their products. In order to meet the needs of severe disease treatment and harmless treatment of regional dead animals, high temperature and biodegradation can be combined to form high temperature biodegradation treatment technology. Biodegradation method has the characteristics of easy selection of treatment site, simple operation, no waste gas and wastewater, environmental protection and no pollution, and the treated products can be used as fertilizers to achieve the effect of recycling resources. Suitable for small and medium-sized harmless treatment centers.

6. Composting method: It refers to putting animal carcasses into compost, adding fillers with high carbon-nitrogen ratio, low water content and high porosity to make compost suitable for microbial degradation conditions, degrading animal carcasses through the metabolic process of microorganisms, and killing pathogenic microorganisms by using the high temperature generated in the degradation process, and finally achieving the purposes of reduction, harmlessness and stabilization. Composting of animal carcasses has no secondary pollution, good treatment effect, easy management, low investment and operation cost, and can be implemented in all pig farms. However, composting method needs a lot of carbon raw materials, and the whole process needs scientific management and monitoring, which is not good and easy to cause the spread of diseases.