Composite coagulant with high content of phosphorus for treating sewage of river basin

Abstract

The invention discloses a composite coagulant with high content of phosphorus for treating sewage of a river basin, and relates to the technical field of phosphorus-removing composite coagulants. Thecomposite coagulant comprises dilute sulfuric acid, a dephosphorization agent A, a dephosphorization agent B, an ammonia nitrogen removal agent A, an ammonia nitrogen removal agent B, water, calcium hydroxy phosphate, activated carbon particles and sodium peroxide, the content ratio of the dilute sulfuric acid, the dephosphorization agent A, the dephosphorization agent B, the ammonia nitrogen removal agent A, the ammonia nitrogen removal agent B and water is 2: 1: 1: 1: 1: 4, and the content ratio of the calcium hydroxy phosphate, the activated carbon particles and the sodium peroxide is 1: 2:1. By the composite coagulant with the high content of the phosphorus for treating the sewage of the river basin, biological phosphorus removal and chemical phosphorus removal are fused organically,moreover, by chemical phosphorus removal, on the one hand, part of phosphorus substances in wastewater can be consumed through chemical reaction, on the other hand, phosphorus can be acidized in cooperation with a dilute sulfuric acid solution to generate phosphoric acid ions, and abundant phosphoric acid ions are provided for biological phosphorus removal.

Description

technical field [0001] The invention relates to the technical field of a phosphorus-removing composite coagulant, in particular to a composite coagulant for treating sewage in river basins with high phosphorus content. Background technique [0002] Sewage treatment is one of the most important projects in modern times. Due to the development of industry, more and more pollutants are discharged into the natural environment. Among them, water source pollution and air pollution are the most serious. Sewage treatment is being used more and more. The country attaches great importance to it, and the funds and technologies invested in sewage treatment are becoming more and more sufficient. Among many sewage treatment technologies, the sewage treatment methods using coagulants have a wide range of applications, and sewage is often rich in various substances. , of which phosphorus and phosphorus compounds are more common in sewage. [0003] When the existing phosphorus removal coagu...

AI Technical Summary

Problems solved by technology

[0003] When the existing phosphorus removal coagulants are used to dephosphorize and purify phosphorus-containing wastewater, the biochemical activity of wastewater treatment is often ignored. Compared with chemical phosphorus removal, biological phosphorus removal technology is not widely used, and simple The method of using phosphorus accumulating bacteria for phosphorus removal is not applicable to all situations or volumes of wastewater. Biological phosphorus removal technology is mostly used in the treatment of phosphorus-containing wastewater in small-scale enterprises. The agent did not play a role in assisting the generation of phosphate ions, resulting in the biological phosphorus removal effect of phosphorus accumulating bacteria to be improved

[0004] A compound dephosphorization coagulant and treatment method for secondary effluent of sewage treatment plants disclosed in Chinese invention patent application publication CN101891287A method, although the production method is simple and the cost is low, it can effectively remove phosphorus and suspended matter, and the removal rate of phosphorus and turbidity is more than 30% higher than that of the commonly used polyaluminum chloride at present. However, it should be used in sewage The compound phosphorus removal coagulant and treatment method of the secondary effluent of the treatment plant did not solve the problems of how to make better use of biological phosphorus removal technology and how to improve the effect of biological phosphorus removal