Metallurgical Wastewater Treatment

1. Features Sewage acid wastewater is very acidic. After neutralization and removal of fluoride, the salinity of the wastewater increases, the hardness is high, and the pH value rises to 9-11. Wastewater contains zinc, copper, lead, cadmium, arsenic, nickel and other metal ions, as well as fluoride, nitrate, organic matter, colloidal particles and other pollutants. If the raw water directly enters the membrane system, the membrane will produce less water and be easily blocked. It must be softened first, and then the heavy metal ions and COD in the sewage must be removed. After the advanced membrane treatment system, the produced water can be reused. 2. Composition According to the source and characteristics of wastewater, there are mainly cooling water, pickling wastewater, washing wastewa