With the continuous development of people's production and life, sewage treatment must be continuously recycled to ensure that the water resources closely related to life are cleaner, safer and healthier. Therefore, the use of water purification agents also needs the continuous investment of all walks of life related to water treatment. Therefore, Lvyuan Environment Group Co.,Limited suggests that three principles must be considered in the selection of water purification agents.

First of all, the key to the selection of water purification agents is high efficiency. To select efficient water purification agents, we need to pay attention to one index - comprehensive unit consumption per ton of water. The comprehensive unit consumption per ton of water refers to the cost of chemicals, pH regulation, coagulant aid, mud pressing, labor, etc. for each ton of water treated with different chemicals. The lower the comprehensive unit consumption per ton of water, the lower the cost. One index to be considered together with the comprehensive unit consumption per ton of water is the treatment rate. Treatment rate refers to the highest removal rate of pollutants contained in the same kind of raw water by different chemicals. The higher the treatment rate, the better the effect. In addition to the principle of high efficiency, the second principle to be considered in selecting water purification agents is that pollutants cannot be controlled. For example, some phosphorus removal agents contain tens of thousands of phosphorus, while some COD removal agents contain more than 10000 cod, which should be avoided when selecting water purification materials. Thirdly, the safety must be paid attention to when selecting water purification agents. Water purification agents should not contain cyanide, mercaptan, thiourea and other elements harmful to human body. The contents of copper, nickel, mercury, arsenic, chromium and cadmium that inhibit microorganisms must also be within the range of emission standards. In addition, the corrosion of water purification agents to equipment should be small, otherwise the maintenance cost and reconstruction cost of equipment are also a sum of money which not a small expense.