The first stage of water treatment is the stage of pre-treatment of water to achieve better purification of water quality. Because a lot of water contains magazines such as sediment and dust organic matter, so that the effect of water purification greatly reduced, we have to be removed or reduced, these are collectively referred to as water pretreatment. And our country's water quality varies from place to place, so we use pure water machine will have different purposes, and because of these factors, for the water pretreatment methods are different, but the main purpose of building always Is built on better purified water.

The first is to sediment the water. We can use a large capacity and low flow rate of natural precipitation method for precipitation treatment.

The second is that it will coagulate. We can use polymer coagulants such as iron and aluminum, so that its impurities in water by bridging the formation of large particles of sediment and then by other equipment to remove.

The third is to use filtering technology. Through special equipment to intercept the water impurities, and then in the removal. The fourth is to soften the water. We use chemicals and cation exchange resins to remove.