These two agents have different uses in sewage treatment. Polymerized ferric sulfate mainly plays the role of coagulation and precipitation of pollutants, such as turbidity removal and phosphorus removal, while bleaching powder and bleaching water mainly play the role of disinfection and sterilization. When coagulation and sterilization are required in water treatment, polyferric sulfate is generally used for coagulation treatment first, and then disinfectant is added for sterilization. It is usually not used together. Why?
Can bleaching powder and polyferric sulfate be used at the same time?
The sewage after flocculation and sedimentation by adding polyferric sulfate shall be precipitated and then added with bleaching powder for disinfection and sterilization. At this time, if bleaching powder is added immediately, polyferric sulfate will be used for oxidation and disintegration of sludge particles after flocculation and sedimentation, affecting the flocculation effect, resulting in high effluent turbidity and COD rise. How to avoid polymerized sulfuric acid
Conflict between iron and bleach
Polymerized ferric sulfate is mainly used to clear the turbid water by coagulation, dissolve it in water, adsorb and settle the small particles in water, produce alum sediment, and then separate alum from water. Get the effect of turbidity removal.
In normal application, there is no conflict between polyferric sulfate and bleaching powder. Bleaching powder is calculated and added according to the content of microorganisms in water. When adding bleaching powder, it is best to detect the water quality first. Hypochlorite dissolved in bleaching powder and water can kill microorganisms and bacteria in water and play the role of disinfection and sterilization.
When using polyferric sulfate and bleaching powder for sewage treatment, it should be noted that polyferric sulfate is added first to flocculate and clarify the water, so that the alum settled by polyferric sulfate and suspended solids is discharged, and then bleaching powder is added for disinfection. Polyferric sulfate solution should be stirred with water to better remove turbidity and other pollutants
