Mechanism of Wastewater Treatment in Constructed Wetlands
人工湿地废水处理机理

A detailed investigation was made on the configuration and mechanism of constructed wetlands. It was concluded that the high efficiencies of removing nitrogen, phosphorus and organics are mainly due to the synchronization of physical, chemical and biological processes, and due to the alteration of aerobic, anoxic and anaerobic conditions. For municipal wastewater containing less COD, BOD5 and COD removal rates are greater than 80%, and BOD5 in effluent is around 10 mg/L. The removal rates of total nitrogen and total phosphorus are greater than 60% and 90%.