The newly developed Dephosphorizing Agent (DSA - 1) by our company is a chemical inorganic compound salt. It is specifically developed for high - concentration phosphorus - containing wastewater from processes such as phosphating, electroplating, and from the production of organic phosphate fertilizers and organic phosphorus pesticides. This product addresses the issues of large dosage requirements and incomplete phosphorus removal that are common with conventional dephosphorizing agents. Additionally, it has advantages such as adjusting the pH value of the wastewater, enhancing the coagulation effect, and reducing treatment costs.

II. Product Advantages

• Wide Application Range: It can effectively treat various types of phosphorus - containing wastewater, including those from phosphating, electroplating, electroless plating, and organic phosphorus pesticides, ensuring that the treated water meets the discharge standards.

• Simple Operation and Low Cost: The operation is straightforward, and the treatment cost is low. The effluent is clear and transparent.

• Broad pH Applicability: It can be used in a wide pH range of wastewater.

• Multiple Functions: It has multiple functions such as phosphorus removal, COD reduction, and pH adjustment.

III. Scope of Application

1. It is used for phosphorus removal in domestic sewage treatment plants, especially suitable for the treatment of sewage with medium - level phosphorus content.

2. It is applicable to various phosphorus - containing industrial wastewater from processes like phosphating, electroplating, electroless plating, and organic phosphorus pesticides.

3. It is used for treating wastewater from food processing and slaughtering industries.

4. It is applied to the treatment of wastewater from organic phosphorus pesticide plants and fertilizer factories.

IV. Usage Methods

1. General Steps for Solid Agent

• Take a 1 - liter wastewater sample to detect the content of phosphate radicals.

• Calculate the dosage of the solid new high - efficiency Dephosphorizing Agent DSA - 1 according to the ratio of phosphate radical content : dephosphorizing agent = 1mg/L : 0.04g. Dissolve the agent and add it to the raw wastewater.

• Stir for 10 minutes for reaction.

• Adjust the pH value appropriately. If the pH value is greater than 6, there is no need to adjust the pH.

• Add a certain amount of PAM for flocculation and sedimentation.

• Detect the content of phosphate radicals in the supernatant.

• Determine the dosage according to the results of the bench - scale test.

2. For Liquid and Solid Agents

• The liquid dephosphorizing agent can be directly pumped and added, or it can be added after being diluted to a concentration of 10 - 50%. For the solid dephosphorizing agent, first add it to tap water to prepare a solution with a concentration of about 10 - 30% (mass ratio) (add water first and then the agent while continuously stirring), and then pump it into the reaction tank.

3. Combined Use

• The treatment effect is better when combined with calcium salts. The dosage of the high - efficiency dephosphorizing agent should be adjusted appropriately according to on - site conditions and the bench - scale test plan.

4. Usage Conditions: It is applicable to wastewater with a pH value in the range of 4 - 11.