What are the commonly used filter materials for small and medium-sized industrial sewage treatment equipment?
What are the commonly used filter materials for small and medium-sized industrial sewage treatment equipment? Author: my country's economy continues to develop, industry has gradually re-development, pollution emissions from industry are becoming a lot, so often associated with industrial wastewater toxic or flammable substances, if not handled properly may lead to In safety accidents, small and medium-sized industrial sewage treatment equipment is widely used in industry. Microorganisms in small and medium-sized industrial sewage treatment equipment adhere to the filter material and can be discharged out of the pool after purification. Commonly used filter materials can be divided into several types. What are the commonly used filter materials for the following environmental protection small and medium-sized industrial sewage treatment equipment? 1. Hollow block filter material. It is cylindrical or spherical with pores of various shapes and sizes inside. The specific surface area and porosity are greatly increased compared with the solid block filter material, which can increase the biomass concentration and the corresponding processing capacity in the small and medium-sized industrial sewage treatment equipment, and reduce the blockage of the filter material layer. This type of filter material is mostly made of plastic. 2, solid block filter material. This kind of filter material is cheap and easy to obtain, but it is heavy, small in specific surface area and low in porosity. Small and medium-sized industrial sewage treatment equipment using this type of filter material has low biomass concentration, which limits the organic load, and is prone to local filter blockage and the resulting short-flow phenomenon during operation, which affects the operation effect. 3. Cross-flow filter material. It consists of corrugated pipes or honeycomb pipes with different inclination directions, and the inclination angle is generally 60°. When water flows through the filter layer, it flows in a cross-shaped (or baffled) flow direction, and its specific surface area and porosity are similar to those of the tube-flow type filter material, but the COD removal rate is high, the working characteristics are better, and the application is increasingly widespread. 4. Tube flow filter material. Pipeline water flow can be formed, the specific surface area is 100-200m2/m3, the porosity is 80%-90%, which are 2-5 times and 1.5 times that of the solid block filter material, respectively. The use of this type of filter material can obtain higher Biomass concentration, and it is not easy to be blocked during operation. This kind of filter material is light and stable, but the price is higher. 5. Fiber filter material. Both the specific surface area and the porosity are large. When the sewage flows through the filter tank of the integrated sewage treatment equipment, the fibers float with the water, which can enhance the contact effect of the biofilm on the sewage with the sewage, and improve the mass transfer efficiency of organic matter. At the same time, due to the shearing effect of the water flow, the thickness of the biofilm can also be prevented from being too large to ensure higher biological activity and good mass transfer conditions. However, when using soft fiber filter media, the biofilm is prone to agglomeration.
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