Centralized sewage treatment and upgrading technology
Centralized sewage treatment and upgrading technology is an important issue in the current environmental protection field. With the acceleration of industrialization and urbanization, it is particularly important to effectively treat sewage and protect water resources and the environment. The following is a detailed discussion of centralized sewage treatment and upgrading technology:
1. Centralized sewage treatment technology
Centralized sewage treatment technology refers to the process of collecting sewage in a certain area through a pipe network and concentrating it in a sewage treatment plant for unified treatment. This process mainly involves pretreatment, biochemical treatment, deep treatment and sludge treatment.
Pretreatment: Pretreatment is a necessary step before sewage enters biochemical treatment. It mainly removes large suspended particles, grease, etc. in sewage through physical or chemical methods to reduce the load of subsequent treatment processes. Common pretreatment processes include screens, regulating tanks, sedimentation tanks, etc.
Biochemical treatment: Biochemical treatment is the core link of sewage treatment. It uses the metabolism of microorganisms to convert organic matter in sewage into inorganic matter to achieve the purpose of purifying water quality. Common biochemical treatment processes include activated sludge method, biofilm method, anaerobic digestion method, etc. Among them, the activated sludge method is widely used due to its good treatment effect and stable operation.
Deep treatment: Deep treatment is the process of further removing pollutants such as refractory organic matter, nitrogen, and phosphorus from sewage on the basis of biochemical treatment. Common deep treatment processes include coagulation sedimentation, filtration, adsorption, and membrane technology. These technologies can significantly improve the effluent quality and meet higher emission standards or reuse requirements.
Sludge treatment: Sludge treatment is an indispensable part of the sewage treatment process. Its main purpose is to reduce the volume of sludge, stabilize the properties of sludge, eliminate toxic and harmful substances in sludge, and realize the resource utilization of sludge. Common sludge treatment processes include concentration, stabilization, dehydration, drying, and incineration.
2. Improvement of centralized sewage treatment technology
In order to further improve the centralized sewage treatment effect, it is necessary to start from the following aspects:
Technological innovation: Strengthening technological innovation is the key to improving sewage treatment technology. By introducing and absorbing advanced foreign technologies, digesting, absorbing, and re-innovating in combination with domestic actual conditions, a sewage treatment technology system with independent intellectual property rights is formed. At the same time, we should focus on the cultivation of independent innovation capabilities, increase investment in sewage treatment technology research and development, and promote the application and transformation of technological innovation results.
Equipment upgrade: The performance of sewage treatment equipment plays a vital role in the treatment effect. Therefore, it is necessary to regularly inspect and maintain the sewage treatment equipment to ensure its normal operation. At the same time, the sewage treatment equipment should be gradually updated and upgraded according to actual needs to improve the equipment's processing capacity and stability. For example, the use of more efficient aeration equipment, membrane components, etc. can significantly improve the sewage treatment effect.
Intelligent management: Intelligent management is an important means to improve the level of sewage treatment. By establishing an intelligent management system for sewage treatment plants, real-time monitoring and data analysis of the entire sewage treatment process can be achieved, problems can be discovered in a timely manner, and corresponding treatment measures can be taken. At the same time, the intelligent management system can also optimize sewage treatment process parameters and operation modes to improve sewage treatment efficiency and stability.
Resource utilization: Wastes such as sludge generated during sewage treatment have certain resource utilization value. By adopting advanced sludge treatment technology, sludge can be converted into resource products such as organic fertilizers and building materials, realizing the reduction, harmlessness and resource utilization of sludge. This can not only reduce the cost of sludge treatment, but also promote the development of a circular economy.
