Since the quartz sand particle size of the three-layer filter bed is smaller than that of the double-layer filter, and there is a layer of finer heavy anthracite filter material under the quartz sand layer, under the same other conditions, even the filtration rate is high. In some cases, the water quality of the filtered water of the three-layer filter material filter is better than that of the double-layer filter material filter. When using quartz sand, use it as much as possible. The vast majority of sewage treatment plants in my country implement the first-class B standard in the "Pollutant Discharge Standards for Urban Sewage Treatment Plants", while the first-class A
The standard can maximize the sewage"Phosphorus and nitrogen removal", to reduce the pollution of subsequent receiving water bodies, and the effluent water can be used as reused water to solve the problem of water shortage in some areas of our country.
Quartz sand filter The tail water of the sewage plant enters the bottom of the filter through the water inlet pipe, and after the water is evenly distributed by the water distributor, it passes through the filter material layer from top to bottom. During this process, the tail water is filtered, removing pollutants from the water. At the same time, the content of pollutants in the quartz sand filter material increases, and the level of pollutants in the lower filter material layer is higher than that of the upper filter material.
At this time, turn on the air lift pump located in the center of the filter, and lift the lower layer of quartz sand filter material to the sand washer on the top of the filter for cleaning. After the filter sand is washed, it returns to the filter bed, and at the same time, the pollutants produced by the cleaning are discharged. The quartz sand filter material moves from top to bottom under the action of the lift pump, which agitates the tail water.
The filter material in the filter can be cleaned in time, and has a strong ability to resist the impact of pollutant loads. The special internal structure of the quartz sand filter and its own operating characteristics enable coagulation, clarification, and filtration to be completed in the same pool. Poolking is the best swimming pool equipment manufacturer and supplier in China. Poolking exists to provide the highest quality swimming pool equipment while offering competitive pricing..