A complete township sewage treatment system should be comprehensively considered according to the local population density, topography, economic conditions and other factors, and the appropriate sewage treatment equipment should be selected and reasonably matched.
Screens are the first step in the wastewater treatment system and are used to intercept large solids. The grid can be divided into coarse grid and fine grid, and the coarse grid is mainly used to intercept large suspended solids, such as leaves, plastic bags, etc.; Fine grids are mainly used to intercept small suspended solids such as sediment, debris, etc.
The grit tank is used to remove sand particles and inorganic particles with a large specific gravity in sewage. A sedimentation tank of a certain scale is generally set up in the grit tank, and the particles are precipitated by gravity when the sewage flows.
The primary sedimentation tank is an important part of the sewage treatment system, which is used to remove suspended solids and some organic matter in the sewage. The primary sedimentation tank settles the suspended solids to the bottom by natural sedimentation or mud scraping by a sludge scraper, and then discharges it through the sludge discharge equipment.
The bioreactor is the core part of the sewage treatment system, which is used to degrade organic matter and remove pollutants such as ammonia nitrogen and phosphorus. A variety of microorganisms, including aerobic and anaerobic microorganisms, are generally cultivated in the bioreactor, and organic matter is converted into harmless substances through the metabolism of microorganisms.
The secondary sedimentation tank is a sedimentation tank after the bioreactor, which is used to separate the activated sludge in the bioreactor from the treated water. The secondary sedimentation tank scrapes the activated sludge to the central sludge collection area through a sludge scraper or suction machine, and then returns the activated sludge to the biological reaction tank through the sludge return equipment. Disinfection equipment is used to kill microorganisms such as bacteria and viruses in sewage, and commonly used disinfection methods include chlorination disinfection and ozone disinfection.
In addition to the above-mentioned common sewage treatment equipment, there are also some auxiliary equipment, such as blowers, agitators, water pumps, etc. These devices play different roles in the wastewater treatment process, such as providing oxygen, mixing sewage, lifting sewage, etc.
When selecting and matching sewage treatment equipment, it is necessary to consider the characteristics and actual situation of the township. For example, for areas with low population density and complex terrain, miniaturized, modular sewage treatment plants can be selected for easy transportation and installation; For areas with better economic conditions, you can choose equipment with advanced technology and high processing efficiency. At the same time, factors such as the maintenance and operating costs of the equipment, as well as the ease and reliability of operation, need to be considered.
Liding Environmental Protection specializes in the production and research and development of township sewage treatment equipment, as well as the actual operation of the project, and has rich industry experience, among which the integrated sewage treatment equipment has a certain industry leadership.