%A LIU Li, ZHU Liwei, PENG Xilin, ZHOU Yang, ZHANG Kaibin, SUN Haodi, LI Xiaolin %T Research Progress on Non-Orthophosphate Treatment Technology in Sewage %0 Journal Article %D 2022 %J Materials Reports %R %P 22050093-5 %V 36 %N Z1 %U {http://www.mater-rep.com/CN/abstract/article_4908.shtml} %8 2022-06-05 %X Phosphorus is one of the essential elements of animals and plants, and it is also an important chemical raw material. With the large-scale production and application of phosphorus, the sewage produced during the period contains a large amount of phosphorus, the enrichment of phosphorus element will cause the entrophication of the water, resulting in the death of a large number of animals. At present, the phosphorus elements in sewage mainly include orthophosphate, non-orthophosphate (phosphite, hypophosphite) and organic phosphorus. With the development of the surface treatment industry, non-orthophosphates are used more and more widely as an important component of phosphating surface treatment. Compared with orthophosphate, non-orthophosphate cannot be directly removed by biological methods and coagulation methods, resulting in excessive total phosphorus. Therefore, the removal of non-orthophosphate is an important research content in wastewater treatment. This article summarizes the removal methods of non-orthophosphates, and finds the applicable methods for different systems. The treatment methods of non-orthophosphate are mainly divided into physical adsorption method and chemical oxidation method. The physical adsorption me-thod has better absorbed effect on low non-orthophosphate wastewater and high treatment efficiency, but has a greater limitation on the absorption of high non-orthophosphate wastewater; the chemical oxidation method is a commonly used method for the treatment of non-orthophosphate, and the chemical oxidation method is divided into traditional oxidation, Fenton oxidation and electrochemical oxidation. However, due to the need for additional chemicals, the chemical oxidation method produces a higher sludge content and requires higher treatment costs. In general, physical methods and chemical methods have their own advantages and disadvantages, and more in-depth research is needed on the treatment of non-orthophosphates.