I. Introduction.
With the development of animal husbandry, the number of slaughterhouses is increasing, and the resulting wastewater treatment problem is becoming more and more prominent. Slaughterhouse wastewater contains a large amount of organic matter, ammonia nitrogen, phosphorus and other pollutants, if not effectively treated, will cause serious pollution to the environment. Therefore, how to effectively treat slaughterhouse wastewater has become an urgent problem to be solved. This article will introduce the characteristics and treatment technologies of slaughterhouse wastewater in detail.
Second, the characteristics of slaughterhouse wastewater.
Slaughterhouse wastewater mainly includes blood, visceral residue, meat scraps, cleaning wastewater, etc. produced during the slaughtering process. Wastewater has a high content of organic matter, high content of nutrients such as ammonia nitrogen and phosphorus, and contains a variety of microorganisms such as bacteria, viruses and parasite eggs. In addition, wastewater has a high color and turbidity and a strong fishy odor.
3. Slaughterhouse wastewater treatment technology.
1.Physical processing technology.
Physical treatment technologies mainly include precipitation, filtration, separation, etc. Through physical treatment, large particles of suspended solids and some organic matter can be removed from wastewater. Commonly used physical treatment methods include grid filtration, sedimentation tank, filtration tank, etc.
2.Chemical treatment technology.
Chemical treatment technologies mainly include coagulation, precipitation, redox, etc. Through chemical treatment, heavy metal ions, colloidal particles and some organic matter can be removed from wastewater. Commonly used chemical treatment methods include acid-base adjustment, coagulation and precipitation, oxidant oxidation, etc.
3.Biological treatment technology.
Biological treatment technology is to use the metabolism of microorganisms to convert organic matter in wastewater into harmless substances. Commonly used biological treatment technologies include activated sludge method, biological filter method, biological contact oxidation method, etc. Biological treatment technology has the advantages of good treatment effect and low cost, and is the main method of wastewater treatment in slaughterhouses.
Fourth, the slaughterhouse wastewater treatment process.
The slaughterhouse wastewater treatment process mainly includes three stages: pretreatment, biochemical treatment and post-treatment. In the pretreatment stage, large particles of suspended solids and some organic matter in wastewater are removed by physical methods. The biochemical treatment stage is mainly to remove organic matter and nutrients from wastewater through biological methods; The post-treatment stage is mainly to carry out advanced treatment of biochemically treated wastewater through physical or chemical methods to meet the discharge standards.
2024 Travel Guide V. Conclusions and Recommendations Slaughterhouse wastewater is a high-concentration, high-pollution organic wastewater, which must be effectively treated to reduce environmental pollution. At present, biological treatment technology has become the main method of wastewater treatment in slaughterhouses, but it is difficult for a single biological treatment technology to meet the increasingly stringent discharge requirements. Therefore, it is necessary to study more efficient and low-cost slaughterhouse wastewater treatment technology, and strengthen the research on sludge reduction and resource utilization to realize wastewater resource utilization and reduction. In addition, it is important to have a sound regulatory mechanism and sewage treatment facilities in place to ensure that slaughterhouse wastewater is treated effectively.