Study On The Performance Of Wetland Combined Treatment Of Tail Water From Sewage Treatment Plant

In view of the common problems of urban sewage treatment plant fluctuating and stable compliance of effluent quality,it is of great significance to explore the practical effect of constructed wetlands on the further purification of sewage treatment plant effluent to improve the effluent stability of urban sewage treatment plants.In the study,10 points were set along the constructed wetland combination process and samples were taken several times over a one-month period.Measure the main indicators include:Chemical Oxygen Demand?COD?,Biochemical Oxygen Demand?BOD₅?,Total Nitrogen?TN?,Ammonia Nitrogen?NH3--N?,Total phosphorus?TP?concentration.COD could reach 40 mg/L,BOD5 could reach 1 mg/L,NH3-N could reach 0.2 mg/L,TN could reach 12 mg/L,TP could reach 0.2 mg/L.The results showed that the combined process had good treatment effect and strong operation stability,and presented high purification efficiency on the removal of BOD5,NH3-N and TP in sewage,and the tail water quality of the sewage treatment plant was improved.