My country is a country with water shortage, and the problem of urban water shortage is particularly prominent.Backwash filter the emergence of urban sewage has been effectively treated and rationally used. The backwash filter has stable water quality and low operating cost, which is deeply loved by people.

As of the end of May, there were 103 cities above the county level in 11 provinces (cities) with water shortages, of which 56% were in severe water shortages. At present, many urban residents are facing serious difficulties in water production and living, and urban water safety is seriously threatened. At the same time, due to the relatively lagging control of water pollution, the number of polluted water bodies has increased year by year, which has exacerbated the shortage of water resources.

Due to the pollution of the water body environment, the water-rich areas in southern my country have already experienced a trend of water-quality-type water shortage, and some cities are facing the dilemma of "water is difficult to use". In the north, many cities suffer from both resource-based water shortages and water-quality water shortages. Water shortage and serious water pollution have become important factors restricting the sustainable development of cities. In some places, water shortage has even become an important factor restricting urban development.

The backwash filter can effectively intercept the suspended solids, particles, bacteria and algae and other harmful substances in the water body by using the filter screen to achieve the purpose of purifying the water source and improving the water quality. The water quality treated by the backwash filter not only meets the sewage discharge standard, but the water source treated by the backwash filter can be reused, which can effectively save water and energy. In summary, with the effective treatment of the backwash filter, the urban sewage problem has been effectively solved. Nowadays, the backwash filter has been widely promoted and applied by people.