Constructed Wetland Technology and the Research in the Northern Region of China

Because of the low cost and simple operation,the constructed wetland technology has been widely used in treating municipal wastewater、eutrophic water body、river ecological regulation、industrial and agricultural wastewater,etc.The paper introduced the concept of the constructed wetland,classification,the application and research progress of the three types of constructed wetlands at home and abroad.In addition,the paper disscussed the application and research progress of the constructed wetlands in the northern region,measures to prevent the cold winter,choice of wetland plants,our research content at choice of wetland plants and biochemical mechanism,and the development prospects of the constructed wetland technology.