Abstract:

The wastewater treatment effect of pH, turbidity, CODcr, TN, TP had been studied by the constructed wetland in Cuihu wetland, Beijing. From the operation effect, the average removal of turbidity, CODcr, TN and TP was 42.659%, 7.161%, 25.583%, 24.662% respectively after 3 months. The results showed that pH decreased with time, the outlet value of pH was gradually improved. The average Turbidity removal rate was 66.459%, 62.562%, 33.343%, 6.616%, 44.314%, respectively in 5 different periods (2009-6-3, 2009-6-26, 2009-7-9, 2009-7-29, 2009-8-17). The removal of CODcr had less fluctuation over time, removal rate was 4.347%, 4.716%, 10.748%, 9.370%, 6.622% respectively in Cuihu constructed wetland. The average TN removal rate was 15.465%, 27.669%, 30.507%, 33.177%, 21.098% respectively. The average TP removal rate was 2.688, 49.790%, 21.538%, 13.580%, 35.714% respectively.