The pretreatment of water filtration refers to the process of removing or reducing suspended solids and colloids in water to a certain extent, and the process required for general water use is called water pretreatment. The commonly used methods for water filtration pretreatment are as follows:
- Precipitation
Use natural sedimentation (such as grit chamber), or soften the agent (such as adding chemicals), so that the sediment in the water, large particles of suspended solids temporarily formed a precipitate and settled.
- filter
The treated water is passed through a granular filter to remove impurities in the water by the filter material, or to obtain clear water. Such as various filters, filters, etc.
- Coagulation and clarification.
By the action of the coagulant, the solid particles in the water are adsorbed by mutual contact, and their size and density are changed to separate from the water.