With the acceleration of urbanization and the increasing prosperity of industrial development, sewage treatment has become an important environmental protection work. The application of sewage centralized system technology has become an effective means to solve the problem of sewage treatment. This article will introduce the technical process and its application of sewage centralized system in detail.
1. Overview of the technical process of the sewage centralized system.
The technical process of sewage centralized system refers to the process of collecting and transporting sewage in urban or industrial areas to sewage treatment plants through the pipe network for centralized treatment. It mainly includes sewage collection, transportation, pretreatment, biological treatment, advanced treatment, sludge treatment and other links. This process has the advantages of high treatment efficiency, small footprint and stable operation, so it has been widely used in urban sewage treatment.
Second, the main link of the sewage concentration system technology.
1.Sewage collection and conveyance.
Sewage collection and transportation is the primary link in the technical process of sewage centralized system. Through the construction of a complete sewage collection pipe network, sewage in urban or industrial areas is collected, and then transported to sewage treatment plants through pumping stations and other conveying equipment. In this process, it is necessary to pay attention to the layout of the pipe network and the design of the pumping station to ensure the smooth collection and transportation of sewage.
2.Pretreatment.
Pretreatment is one of the important links in the technical process of sewage centralized system. The main purpose of pretreatment is to remove impurities such as large particulate matter and suspended solids in the sewage, so as to prevent impurities from entering the subsequent treatment process and causing damage to the treatment equipment. The methods of pretreatment include grids, grit removers, regulating tanks, etc.
3.Biological treatment.
Biological treatment is the core link of the technical process of the centralized sewage system. It uses the metabolism of microorganisms to convert the organic matter in the sewage into harmless substances. Biological treatment methods include activated sludge method, biofilm method, etc. Among them, the activated sludge method is the most widely used biological treatment method at present.
4.Deep processing.
Advanced treatment is another important part of the technical process of sewage centralized system. Its main purpose is to remove nutrients, trace harmful substances, etc. from sewage to achieve higher water quality standards. Methods of advanced treatment include filtration, disinfection, nitrogen and phosphorus removal, etc.
5.Sludge treatment.
Sludge treatment is the last link in the technical process of sewage centralized system. Sludge is a solid waste generated during the sewage treatment process that needs to be treated to prevent harm to the environment and the human body. Sludge treatment methods include incineration, landfill, resource utilization, etc.
Third, the application of the technology and process of the sewage centralized system.
The technology of sewage centralized system has been widely used at home and abroad. In developed countries, the rate of urban sewage treatment is generally high, and the technology of sewage centralized system occupies an important position. In developing countries, with the acceleration of urbanization and the improvement of environmental awareness, more and more cities have begun to adopt centralized sewage system technology to treat sewage.
In China, China attaches great importance to sewage treatment and has formulated a series of policies and standards to encourage and support the adoption of advanced sewage treatment technologies. At present, China's urban sewage treatment rate has reached a high level, in which the technology of centralized sewage system has played an important role.
However, the application of wastewater concentration system technology also faces some challenges. For example, the construction of a sewerage network requires a large amount of capital investment, and the financial situation in some areas is not optimistic. In addition, sludge disposal is also a problem, and more environmentally friendly and economical treatment methods need to be found.
IV. Conclusions. The sewage centralized system technology is an efficient, stable and small-footprint sewage treatment method, which has been widely used in urban sewage treatment. However, its application also faces some challenges, which require the joint efforts of all sectors of society to strengthen technology research and development and capital investment to promote the sustainable development of sewage treatment.