The environmental pollution caused by livestock and poultry excreta on large-scale breeding farms is the main source of pollution in the animal husbandry environment. The main components are nitrogenous compounds, phosphorus, crude fiber, certain drugs, etc. The contents of various components are related to livestock and poultry breeds, feeds, and With regard to feeding methods, etc., it will pollute the air, water, and soil. Without effective treatment, the farm emits a very unpleasant odor and seriously pollutes the living environment of the surrounding residents.
There are more than 90 kinds of zoonotic communicable diseases among communicable patients. The main carriers of these infectious diseases are feces and excrement. In terms of pigs, the parasite is most often transmitted to humans. Anthrax, Brucellosis, and tuberculosis infections are also common. In human-animal communicable diseases, severe diseases pose a great threat to humans.
The free discharge of sewage from animal manure and livestock product processing plants can easily cause eutrophication of water bodies. These contaminants are discharged directly into natural water bodies without treatment, such as reservoirs, lakes, and paddy fields. Aquatic organisms in the water, such as algae, get plenty of nutrients such as nitrogen, phosphorus, and potassium and immediately multiply, consume oxygen in the water, threaten the fish to survive or even die in the pond.
Drug residues cause potential contamination of livestock products and the environment. Due to the development of large-scale and intensive animal husbandry, extensive use of antibiotics and sulfa drugs has become the main method for the control of livestock and poultry diseases. Due to the lack of economic interests and people’s lack of scientific knowledge, the phenomenon of drug abuse is widespread, resulting in livestock and poultry products. (including meat, egg, and milk) drug residues. These products are transferred to the body through people's food intake and affect their health. Such as chloramphenicol, it mainly damages the human hematopoietic system, causing anemia and even the occurrence of leukemia; DDT in organochlorine drugs is strong and stable toxicity, through the organism can be trace DDT enriched to a serious degree of cancer damage.
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