A perfect township sewage treatment system should be comprehensively considered according to the local population density, landform, economic conditions and other factors, and select the appropriate sewage treatment equipment and reasonable collocation. The grille is the first step in the sewage treatment system, which is used to block large solid objects. Grating can be divided into coarse grille and fine grille, coarse grille is mainly used to intercept large suspended matter, such as leaves, plastic bags; fine grille is mainly used to intercept smaller suspended matter, such as sediment, debris, etc. Sand settling tank is used to remove sand particles and inorganic particles with large proportion in sewage. Generally, a certain scale of sedimentation tank is set in the sedimentation tank, and the gravity of the sewage flows. Primary sedimentation tank is an important part of sewage treatment system, which is used to remove suspended matter and some organic matter in sewage.
The primary sedimentation tank settles the suspended matter to the bottom through natural precipitation or mud scraper scraping, and then passes through the mud discharge equipment. The biological reaction tank 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. Various microorganisms are generally cultivated in a biological reaction pool, including aerobic microorganisms and anaerobic microorganisms, which can convert organic matter into harmless substances through the metabolic action of microorganisms. The secondary sedimentation tank is a sedimentation tank after the biological reaction tank, which is used to separate the activated sludge in the biological reaction tank from the treated water. The second sedimentation tank scratches the activated sludge to the central sludge collecting area through the sludge scraper or mud suction machine, and then the activated sludge is returned to the biological reaction tank through the sludge reflux equipment. Disinfection equipment is used to kill bacteria and viruses and other microorganisms in sewage. Commonused disinfection methods include chlorination disinfection and ozone disinfection.
In addition to the above common sewage treatment equipment, there are some auxiliary equipment, such as blower, mixer, water pump and so on. These devices play different roles in the sewage treatment process, such as providing oxygen, mixing sewage, lifting sewage, etc.
When selecting and matching sewage treatment equipment, we need to consider the characteristics of the town and the actual situation of the town. For example, for areas with low population density and complex terrain, small and modular sewage treatment equipment can be selected for easy transportation and installation; for areas with better economic conditions, equipment with advanced technology and high treatment efficiency can be selected. At the same time, the maintenance and operation costs of the equipment, as well as the ease and reliability of the operation, should be considered.
Post time: Feb-23-2024