Application of Subsurface Flow Constructed
Wetland System for Purification of Secondary
Effluent from Municipal Wastewater
Treatment Plant

The main objective of this study was to investigate the efficacy of using the constructed wetland for purification of secondary effluent from a wastewater treatment plant (WWTP) in the eastern district of Anyang, Henan province, China. A Subsurface Flow Constructed Wetland (SSFCW) system was designed and constructed, consisting of 302 SSFCW units (L×W×H = 30×20×1.4 m for each unit) with a treatment capacity of 10 5 m 3 /d. Each unit of the system was planted with equal number of Phragmites australis , Typha orientalis Presl