Slaughtering sewage is one of the important environmental problems generated in the meat processing process, which contains a large number of pollutants such as organic matter, suspended solids, oils and pathogens, and if discharged directly without treatment, it will have a serious impact on the environment and human health. Therefore, the treatment of slaughter wastewater is crucial. The treatment method of slaughter sewage and its importance are described in detail below.
First, the characteristics of slaughtering sewage.
Slaughtering sewage is a high-concentration organic wastewater with the following characteristics:
1.High organic matter content: Slaughtering sewage contains a large amount of organic matter such as protein, fat, carbohydrates, etc., which are easy to decompose in water to produce foul odor and peculiar smell.
2.There are many suspended solids: the slaughtering sewage also contains a large number of suspended solids such as animal hair and internal organ fragments produced during the slaughtering process, which seriously affect the water quality.
3.High oil content: Slaughtering sewage also contains animal fats and other oils, which are easy to form an oil film on the surface of the water body, affecting the oxygen exchange of the water body.
4.High content of pathogens: Slaughtering sewage also contains a large number of bacteria, viruses and other pathogens, which will pose a threat to human and animal health if not directly discharged without treatment.
Second, the treatment method of slaughtering sewage.
According to the characteristics of slaughtering sewage, the commonly used treatment methods mainly include physical, chemical and biological methods.
1.Physical method: The physical method mainly includes steps such as grid, precipitation, and filtration. Large particles of suspended solids in the wastewater are first removed through a screen, then settled down by a sedimentation tank, and finally further removed by filtration. The physical method is simple and easy, but the treatment effect is limited, and it is often used as a pretreatment step for other treatment methods.
2.Chemical method: The chemical method mainly includes coagulation, oxidation, disinfection and other steps. By adding coagulant, the suspended solids in the sewage are condensed into larger particles, which is convenient for subsequent treatment; Removal of organic matter and reducing substances from sewage by oxidants; Finally, the pathogens in the sewage are killed by disinfectants. The chemical treatment effect is good, but it may produce secondary pollution, and it is necessary to carefully choose chemical agents.
3.Biological method: Biological method is the most commonly used method in slaughtering sewage treatment, mainly including activated sludge method, biofilm method, etc. The activated sludge method is to cultivate a large number of microorganisms in the sludge and use the metabolism of microorganisms to decompose the organic matter in the sewage into inorganic matter, so as to achieve the purpose of purifying water quality. The biofilm law is to use microorganisms on the biofilm to decompose the organic matter in the sewage into inorganic matter. Biological treatment has good effect, can completely decompose organic matter, and has low operating cost, which is the main method of slaughtering sewage treatment.
Slaughterhouse sewage treatment equipment Third, the importance of slaughtering sewage treatment Slaughtering sewage treatment is not only related to environmental protection, but also related to the health of humans and animals. The direct discharge of untreated slaughtering sewage will lead to a series of environmental problems such as water pollution, soil pollution and air pollution, which will seriously affect the ecological balance and human living environment. At the same time, pathogens in slaughter effluent can also pose a threat of infectious diseases to humans and animals. Therefore, slaughter wastewater treatment is of great significance for protecting the environment and maintaining human and animal health. 4. Conclusion: Slaughtering sewage treatment is an indispensable part of the meat processing process. By choosing the right treatment methods and technologies, the pollutants in the sewage can be effectively removed and the environment and human health can be protected. In the future, with the increasing awareness of environmental protection and the continuous development of the slaughtering industry, the slaughtering sewage treatment technology will also continue to improve and innovate to provide strong support for sustainable development.