· Filtration Medium: Polyester mesh has a certain porosity and good filtration performance. It can be used as a primary filtration medium to intercept larger particulate impurities in water, such as sediment, leaves, and suspended solids, protecting subsequent treatment equipment from blockage and damage by large particles. For example, in some small - scale sewage treatment plants or rural drinking water treatment facilities, polyester mesh is often used for preliminary filtration.
· Filter Screen Material: It can be made into various forms of filter screens and applied in filtration equipment. For instance, in the swimming pool water circulation system, the polyester mesh filter screen can effectively filter out hair, dander, and other impurities in the water, keeping the pool water clean. In some industrial circulating cooling water systems, polyester mesh filter screens are also used to filter the water, ensuring the quality of the circulating water and reducing the impact of impurities on the equipment.
· Biofilm Carrier: The surface properties of polyester mesh are suitable for the attachment and growth of microorganisms. It can be used as a carrier material in the biological film - based water treatment process. In processes such as biological contact oxidation and biological filters, the polyester mesh provides a growth site for microorganisms. Microorganisms form a biofilm on its surface, and through biological metabolism, they remove organic matter, ammonia - nitrogen, and other pollutants in the water. It is widely used in the treatment of domestic sewage and industrial wastewater.
· Precision Filtration: Stainless steel mesh has high strength, corrosion resistance, and relatively uniform pore sizes, making it suitable for high - precision filtration. In processes such as reverse osmosis pretreatment and ultrafiltration, the stainless steel mesh can filter out fine particles, colloids, and other impurities in the water, ensuring the quality of the influent and improving the operation efficiency and stability of subsequent treatment units. For example, in the pretreatment stage of a seawater desalination plant, the stainless steel mesh can effectively remove suspended particles in seawater, providing good influent conditions for the subsequent reverse osmosis membrane separation.
· Screens and Gratings: At the inlet of a sewage treatment plant, coarse and fine gratings made of stainless steel are often installed to intercept large pieces of garbage, fibrous substances, etc. in the sewage, preventing them from entering the subsequent treatment processes and causing pipeline blockages or equipment damage. Stainless steel screens can also be used for solid - liquid separation in the sludge dewatering process. Through vibration or extrusion, the water in the sludge is discharged through the screen holes, achieving preliminary sludge dewatering and improving the efficiency of sludge treatment.
· Aeration System: In the activated sludge process of sewage treatment, the stainless steel mesh can be used to make the diffusion elements of the aerator. Air is evenly dispersed into the aeration tank through the diffuser made of stainless steel mesh, forming small bubbles, increasing the gas - liquid contact area, improving the oxygen transfer efficiency, providing sufficient oxygen for the microorganisms in the activated sludge, and promoting the decomposition and removal of organic matter.
