With the development of social economy and the improvement of people's living standards, the demand for meat is increasing, and the slaughtering industry has also developed rapidly. However, slaughtering wastewater causes serious pollution to the environment, so effective treatment processes must be adopted to reduce its environmental impact. In this paper, the characteristics of slaughtering wastewater and the commonly used treatment processes will be described in detail.
First, the slaughtering wastewater and characteristics.
Slaughtering wastewater is mainly used in various processes in the slaughtering and processing process, such as livestock and poultry slaughtering, offal cleaning, blood treatment, etc. Wastewater contains a large amount of organic matter, ammonia nitrogen, phosphorus, heavy metals and other pollutants, with high concentration, high toxicity, poor biodegradability and other characteristics. If these pollutants are not effectively treated, they will cause serious harm to water bodies, soil and ecological environment.
Second, slaughtering wastewater treatment process.
According to the characteristics of slaughtering wastewater, the commonly used treatment processes mainly include three stages: pretreatment, biochemical treatment and advanced treatment.
1.Pre-treatment phase.
The purpose of pretreatment is to remove large impurities, grease and suspended solids in the wastewater, and create good conditions for subsequent biochemical treatment. Pretreatment methods include grid filtration, sedimentation, degreasing, etc. Through these methods, the turbidity and organic matter content of wastewater can be effectively reduced, and the biodegradability of wastewater can be improved.
2.Biochemical processing stage.
The biochemical treatment stage is the core link of slaughtering wastewater treatment, mainly through the action of microorganisms, the organic matter in the wastewater is converted into harmless substances. Commonly used biochemical treatment methods include activated sludge method, biological filter method, biological contact oxidation method, etc. These methods can effectively reduce the content of organic matter and ammonia nitrogen in wastewater, and at the same time have a certain dephosphorization effect. In the process of biochemical treatment, it is necessary to select the appropriate process according to the actual situation of the wastewater, and control the relevant parameters to ensure the treatment effect.
3.Deep processing stage.
The purpose of advanced treatment is to further remove contaminants from wastewater to meet higher discharge standards. Commonly used advanced treatment methods include filtration, adsorption, membrane separation, etc. Through these methods, trace organic matter, heavy metals and other pollutants in wastewater can be effectively removed, and the harm to the environment can be reduced. In the process of advanced treatment, it is necessary to select the appropriate method according to the actual situation of the wastewater, and control the relevant parameters to ensure the treatment effect.
III. Conclusion. The treatment of slaughtering wastewater is an important measure to protect the environment and promote sustainable development. According to the characteristics of slaughtering wastewater, effective pretreatment, biochemical treatment and advanced treatment processes should be adopted to reduce its impact on the environment. In practical application, appropriate treatment processes and methods should be selected according to the actual situation, and technology research and development and innovation should be strengthened to improve the treatment effect and efficiency of slaughtering wastewater. At the same time, industry management and policy guidance should be strengthened to promote the sustainable development of the slaughtering industry and make greater contributions to economic development and the improvement of people's living standards.