How does quartz sand treat urban sewage?

      The pollutants in urban sewage mainly include: 1) natural organic matter; 2) Synthetic organic compounds; 3) Inorganic; 4) Pathogens; 5) Interferers, such as hormones and drugs.

      In the urban sewage regeneration treatment system, the most important thing is to effectively remove all kinds of pollutants in sewage, so that the quality of reclaimed water can meet the functional requirements of a specific water way and the requirements of health and safety, and protect the safety of water facilities and public health. In the design of urban sewage treatment engineering facilities, the typical water quality targets to be met are BOD, SS, residual chlorine, etc.

      Its treatment process includes: chemical coagulation - filter material filtration - membrane filtration - reverse osmosis - disinfection treatment and so on.

      Among them, filter material filtration is the key process to ensure the quality of reclaimed water, filter material such as quartz sand filter material, anthracite filter material, it can be used as a process unit in the regeneration process, can also be used as the final purification treatment unit of the whole regeneration process. The water for filtration treatment can be secondary treatment effluent, chemical coagulation effluent, chemical coagulation precipitation effluent.

      If filtration is used as a pretreatment facility, filtration can ensure the treatment efficiency of subsequent treatment facilities, such as disinfection, activated carbon adsorption, ion exchange and membrane treatment process safety and treatment efficiency, improve the overall effect.

      According to the different inlet water quality, the filtration form can be divided into two treatment effluent pure filtration, direct filtration and flocculation precipitation filtration.