非稳态条件下人工湿地的水动力学特征及其与除污反应动力学模型的耦合研究

项目名称： 非稳态条件下人工湿地的水动力学特征及其与除污反应动力学模型的耦合研究

项目编号： No.51208532

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 建筑环境与结构工程学科

项目作者： 肖海文

作者单位： 重庆大学

项目金额： 25万元

中文摘要： 人工湿地在农业或城市径流处理等面源污染控制领域的大量应用使非稳态条件下人工湿地除污机制的研究任务日益紧迫。然而，传统污水处理理论通常都建立在稳态条件的基础上，非稳态（进、出水流量随时间变化）下的污水处理往往缺乏成熟的理论及试验分析方法。项目将通过基于时间轴的多点示踪剂试验，分析非稳态过程中人工湿地内水力停留时间分布特征及其变化规律，建立非稳态下人工湿地水动力学模型；在此基础上，分析非稳态下水动力学特征对除污反应动力学的影响机制，进行除污效能影响试验，将水动力学特征与除污反应动力学模型耦合，实现非稳态下人工湿地污染物出水浓度变化过程的模拟。项目对揭示非稳态下人工湿地的水动力学特征及其对除污反应动力学的影响具有重要意义；同时也是非稳态污水处理领域新试验、研究方法的探索和尝试。研究成果可为农业或城市径流处理等非稳态人工湿地的除污效能分析以及优化设计和运行提供理论支持，具有广阔的应用前景。

中文关键词： 人工湿地；非稳态；污水处理；停留时间分布；除污模型

英文摘要： Study on pollutant removal mechanism of constructed wetland(CW) with unsteady flow becomes emergent for the increasingly widely use of CW in non-point source pollution control such as management of agriculture and urban runoff. However, traditional wastewater treatment theories are generally based on steady flow condition. The theories and study methods are now inadequate on wastewater treatment in unsteady condition of which the flow rate is time dependent. In this study, The residence time distributions of unsteady flow CW will be investigated by conservative tracer tests based on time series to creat a dynamic model simulating the hydraulics of CW with unsteady flow. After that, the effect of unsteady flow hydraulics on pollutant removal will be analyzed, and experiments will be conducted to determine the impacts of unsteady flow hydraulics on pollutant removal in CW. Finally,the dynamic hydraulic model will be combined with pollutant removal reaction kinetics model to simulate the variation of outflow pollutant concentrations in CW with unsteady flow. It is of great significance to carry on this research and discover the characteristics of hydraulics and its effect on pollutant removal kinetics in unsteady flow CW. Meanwhile, This study would be very helpful in exploring new research and experiment method on

英文关键词： constructed wetland；unsteady flow；wastewater treament；residence time distribution；pollutant removal model