Experimental study on purification of the eutrophic water by integrated constructed wetland

Plant bio-filter series mixed flow constructed wetlands were used for treatment nitrogen, phosphorus and organic matter from eutrophic water-body. The technical design and purification effects of small-scale plots of integrated constructed wetland were described along with details of XiChe Lake eutrophic water. The results showed that the integrated constructed wetland systems had good purification efficiencies for eutrophic water. The removal rates of TP, TN and COD were reach to 80%, 95.8% and 78.7%, respectively. The integrated constructed wetland systems could suffer high pollution loading rate shock, and pollutant density variation had no significant influence on the effluent quality. Purification efficiency of high concentrations is better than low. The integrated constructed wetland decrease wetland jam from accumulating organics and improve the N and P removal efficiency. It has a applied prospects for treating eutrophic water.