十五里河流域初期雨水水质特征与处理方法研究

Study on the characteristic and treatment of the initial rainwater in the Shiwuli River basin of Hefei City

城市区域初期雨水具有污染负荷较大、随机性较强、有明显季节性等特点,需要选择适合的方式处理后排放河道。研究以安徽省合肥市十五里河流域为例,首先通过整理资料及建立城市面源污染模型分析了该区域初期雨水水质情况,然后模拟了排口污染物浓度变化情况,最后根据初期雨水水质特点,并结合生物接触氧化法处理原理,讨论了生物接触氧化法处理初期雨水的适用性。研究旨在针对初期雨水的特点提出高效稳定的处理办法,并保证系统稳定运行,为河道面源污染处理提供指导,拓展生物接触氧化法的应用范围。

The first-flush effect on the urban area with the characteristics of temporal and spatial uncertainty,significant seasonality etc can bring high content of pollutants to the urban river.Many studies show that the rainfall at early stages needs to be treated in an appropriate way before discharged into the river.In this paper,the Shiwuli River,one of the urban rivers accept the initial rainwater from Hefei City,is taken as an example to study whether the biological contact oxidation treatment can improve the quality of the river water.Firstly,the first-flush effect in the Shiwuli River catchment was analyzed;secondly,an urban non-point source pollution model was used to simulated the dynamic change of pollutants concentration at the drainage outlets along the river;lastly,based on the principle of biological contact oxidation treatment,the applicability of biological contact oxidation treatment for initial rainwater was elaborated.The study aims to put an efficient and stable method to treat the initial rainwater,and keep the stable operation of the system.The results of the study can provide guidance for the treatment of river non-point source pollution and expand the application scope of biological contact oxidation method.