Polyferric sulfate is a promising inorganic water treatment agent. It has the advantages of strong cohesion, thick and compact floc, fast precipitation speed, wide pH range and so on. Compared with other flocculants, the use of polymeric ferric sulfate has the advantages of less dosage, high efficiency, low cost and low toxicity. What wastewater can polymerized ferric sulfate treat? Let's introduce it in detail.

1. Treatment of printing and dyeing wastewater

Printing and dyeing industrial wastewater is difficult to meet the discharge requirements by biochemical method alone because of the complex sources and changeable components of raw materials, dyes and additives. In the treatment effect of printing and dyeing wastewater, polymeric ferric sulfate can replace inorganic flocculants such as ferrous sulfate and polyaluminum.

2. Treatment of synthetic detergent wastewater

Wastewater from synthetic washing plant mainly includes sodium alkylbenzene sulfonate, oil (alkylbenzene, chlorinated petroleum, etc.), acid, alkali and inorganic salts (such as sodium hydroxide, cyanide, phosphate, etc.). Comparing the application effects of polymeric ferric sulfate, ferrous sulfate, polyaluminum sulfate and aluminum sulfate flocculants, the COD removal rate of polymeric ferric sulfate is 90-92%, and the removal rate of other flocculants is less than 90%. The flocculating particles formed in the treatment of synthetic detergent wastewater by polymeric ferric sulfate are large and heavy, and settle quickly. It has a good demulsification effect on the emulsified oil in the wastewater and a good adsorption effect on the micro bubbles in the wastewater. After treatment, the effluent will not produce backward migration of iron ions, and will remain clear and transparent for a long time, which can be recycled.

3. Treatment of paper mill wastewater

When polymerized ferric sulfate is used, alum is formed quickly, with large particles and high density. When 7000t wastewater is treated every day, the use of polymeric ferric sulfate saves about 1000 yuan compared with the use of polymeric aluminum.

4. Treatment of petroleum wastewater

When adding polyferric sulfate as coagulant, decolorizing agent and other sewage purification and sludge dewatering treatment, it is necessary to carry out deployment and relevant addition operations. In order to avoid being limited by various use conditions during operation, better treatment effect shall be taken.

5. Treatment of other industrial wastewater

The treatment of copper containing wastewater with polyferric sulfate has achieved good results in log cooking and sludge dewatering.