Research on wastewater treatment using wavy subsurface flow constructed wetlands

A new type of constructed wetland system for sewage treatment, called wavy subsurface flow constructed wetland (W-SFCW), was studied and paralleled with horizontal subsurface flow constructed wetland (SFCW) at same test conditions. Main characteristics of W-SFCW are optimal flow-state on wastewater and domestic sewage flow wavily in W-SFCW bed. So the efficiency of constructed wetland for pollutant removal is higher. Experiment shows that the removal efficiency of W-SFCW bed on COD, NH4+ and TP are 12. 6%, 22. 0% and 8. 4% higher than that of SFCW.