What physical method does the buried fully automatic sewage treatment equipment use to treat sewage?
What physical method does the buried fully automatic sewage treatment equipment use to treat sewage? Author of the article: In recent years, industrial development can improve the economic strength of a city's water pollution problem is getting worse, many factories in the production process of industrial wastewater require the use of sewage treatment facilities for processing. Buried automatic sewage treatment equipment will use physical methods to treat sewage when treating sewage, so that the sewage can be better treated. Then, which physical methods are used by buried automatic sewage treatment equipment to treat sewage, the following editor Let me introduce you. 1. Screening Screening is the most widely used method in pretreatment. The main function is to separate coarse dispersible suspended solids from wastewater. The equipment used is grating and grid sieve. The grid intercepts coarse suspended solids, and its role is to protect the water pump and subsequent processing equipment. The grid screens commonly used in food industry wastewater include fixed screens, rotating screens and vibrating screens. The most commonly used grid screens are 10-40 mesh. 2. Skimming Some food industry wastewater contains a large amount of grease, which must be removed before entering the biological treatment process, otherwise it will cause blockage of pipelines, pumps and some equipment, and will also have a certain impact on the biological treatment process. In addition, the removal and recycling of grease has greater economic value. The oil in wastewater can be divided into two categories: free floating and emulsified according to its physical state. Usually the grease trap removes floating grease. The removal rate of floating grease by the grease trap can reach more than 90%. If there is an adjustment tank or sedimentation tank in the treatment process, the grease trap can be combined with the adjustment tank or the primary sedimentation tank to use a unified structure, which can save investment and land occupation. For small processing systems, an oil-water separator can be installed for oil skimming. 3. Regulation For food industry wastewater with large changes in water quality and quantity, an adjustment tank is often set to adjust the quality and quantity of the wastewater. The adjustment time is generally 24h, mostly about 12h. The capacity of the regulating tank is 50% of the daily wastewater treatment volume. 4. Sedimentation The sedimentation of the integrated sewage treatment equipment is used to remove the inorganic solids and organic solids in the original wastewater, and to separate the solid and liquid phases in the biological treatment process. Use a grit tank to remove inorganic solids in the original wastewater; use a primary sedimentation tank to remove organic solids in the original wastewater; use a secondary sedimentation tank to separate the biological phase and liquid phase in the biological treatment process, and the grit tank is generally set on the grid After the grid sieve. In order to remove the organic matter on the surface of the inorganic solids in the wastewater and avoid the precipitation of the organic solids in the wastewater in the grit tank, an aerated grit tank can be used. The use of the primary sedimentation tank can reduce the load of the subsequent process. The effect of the primary sedimentation tank to remove suspended solids is related to the processed raw materials and products. According to the direction of water flow in the tank, it is divided into advection sedimentation tank, vertical flow sedimentation tank, and radial flow sedimentation tank. In order to improve the sedimentation efficiency of the sedimentation tank, parallel inclined plates or inclined tubes can be arranged in the sedimentation tank to form an inclined plate (tube) sedimentation tank. 5. Air flotation Air flotation is mainly used to remove emulsified oil, surface active substances and other suspended solids in food industry wastewater. There are vacuum air flotation, pressurized dissolved air flotation and diffuser (plate) air flotation. Before the wastewater enters the air flotation tank of the container, adding a chemical coagulant or coagulant to the water can improve the removal rate of emulsified grease and colloidal suspended particles. This is the end of the introduction about which physical methods are used by buried fully automatic sewage treatment equipment to treat sewage. Physical methods are used in many places in sewage treatment. You can also learn about how the physical method in sewage treatment treats sewage. Yes, it will be helpful to understand how the buried fully automatic sewage treatment equipment treats sewage.
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