Research progress of dephosphorization technology on wastewater

The eutrophication of water bodies is usually caused by excess emission of nutrients such as nitrogen and phosphorus in water bodies. Phosphorus is the main element limiting the eutrophication of water bodies. When the phosphorus content in the water column exceeds 0.02 mg/L, eutrophication can occur. It is of great significance to study the dephosphorization processes to solve the environmental pollution of eutrophication. In this paper, dephosphorization processes by microbial, chemical and physical-chemical methods were reviewed. The characteristics and application status of chemical coagulation precipitation, crystallization and adsorption methods in chemical and physical-chemical dephosphorization were emphatically introduced. This paper described the development direction of chemical phosphorus removal, and further proposed the development of more economical and environmentally friendly chemical dephosphorization technologies.