Process characteristics: 　　 Clear water: SS~5mg/L, turbidity 0.3~1.0NTU, visible depth above 4m. 　　 Efficient phosphorus removal: TP<0.02mg/L; Contains high concentration of organic TP. Recommended process for the U.S. EPA. 　　 removes COD 30~50%, which is significantly higher than conventional coagulation process. 　　 Very small area: 100,000 m3/d magnetic separation system is about m2/d. It is 1/10 of the conventional process. 　　 Low cost: Compared with the conventional precipitation process, it can save more than 30% of the dosage of medicament. Application areas: 　　Magnetic separation is a cost-effective solid-liquid separation process, which can be widely used in: 　　1, precipitation process in water plant. 　　2, purification treatment of inorganic wastewater such as mine water. 　　3, water purification of lakes and rivers, removal of cyanobacteria and other suspended matter and nutrients P, to solve the eutrophication of the water body. 　　4, advanced treatment in the sewage plant of the industrial park to remove organic P and TP, COD, SS. 　　5, Urban sewage grade A upgrade (for SS, TP, some BOD/COD.