水平潜流人工湿地氮磷去除回归方程的建立

为考察水平潜流人工湿地对于生活污水中主要污染物指标TN、TP的去除率,建立更为详细的人工湿地回归方程,用以指导人工湿地设计,按照黑箱模型理论,将搜集的500多组数据按照季节、水力负荷、种植植物类型等分类,分析不同因素对于人工湿地去除效果的影响,确定了以季节和水力负荷作为建立回归方程的最主要分类依据.以此为基础,按照线性回归的方法,建立了TN、TP去除率回归方程共12组,所得的拟合优度R2值在0.65~0.95之间,精确性有了很大提高.

The foundation of the regression equation about the removal of TN and TP in horizontal subsurface flow constructed wetlands

In order to study the general effect of treatment of sewage using a horizontal subsurface-flow constructed wetland, a more detailed wetland regression equation of TN、TP needs to be established to guide the design of constructed wetlands. In this study, we used the main pollutant index TN、TP as indicator and classified more than 500 groups of collected data in accordance with the season, hydraulic loading, planting vegetation type in accordance with the "black box model". We analysed different factors affecting pollutant removal by constructed wetlands, took use of season and the hydraulic loading as the main classification criteria. Based on that ,12 groups of regression equations for TN and TP removal were established according to the linear regression method. The goodness of fit R2 values ranges from 0.65 to 0.95, showing the accuracy has been greatly improved.