Processing method for phosphor containing wastewater

Abstract

The invention discloses a treatment method of phosphoric wastewater, which includes the procedures that: firstly, crushed 40-100mu lave powder or lave grain with grain diameter being 3-4 mm is separated after being dipped into water with pH valve being equal to 7-9 for 3-4 days under the constant temperature being 40-60 DEG C, and is dried in 105 DEG C and is activated for 1 h, so active lave is obtained; secondly, 30-1000 mg of obtained active lave is put in 50-800 ml of phosphoric wastewater, and is mixed for 2-3 h; thirdly, the mixed mixture is settled and separated. The treatment method uses large specific surface area of the lava to activate the surfaces containing various metallic elements under the alkalescency condition, so as to cause the metallic elements to be the hydroxylation for forming activation position points of adsorbing phosphate radical which is easily combined with hydroxide radical to be firmly adsorbed on the surface of the lava, thereby the removal ratio of phosphate radical in wastewater can reach up to more than 99 percent. The adsorbed lava can be used repeatedly after acidizing.

Description

technical field [0001] The invention relates to a treatment method for wastewater containing phosphate ions, and belongs to the technical field of sewage treatment in environmental protection. Background technique [0002] my country's water resources are short, water pollution is becoming more and more serious, and the discharge of wastewater is increasing year by year. The conventional sewage treatment process generally uses a combination of biological and chemical methods to remove phosphorus, but the general biological phosphorus removal method can only remove about 30-40% of phosphorus, and it is difficult to completely remove pollutants such as phosphate radicals, resulting in many rivers and lakes. Eutrophication. Studies have shown that when the concentration of phosphate in the lake reaches 0.03mg / L, it can cause eutrophication. Therefore, phosphorus removal from domestic sewage and industrial wastewater is one of the effective measures to control water eutrophica...

AI Technical Summary

Problems solved by technology

However, in the traditional sewage biological treatment process, the addition of iron salt will reduce the pH value of the water. Although the excessive dosage is beneficial to chemical phosphorus removal, it will have an adverse effect on biological treatment, and the treated water is yellow.

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