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以济南玉清湖水库为例,采用水平潜流人工湿地系统对沉砂后的微污染黄河水进行了预处理试验,考察了湿地系统对污染物的去除效率及其变化趋势.同时,根据实验数据,构建了潜流人工湿地系统COD、TN、TP的一级动力学模拟方程.结果表明,水平潜流人工湿地系统对COD、TP、TN和NH4+-N的平均去除率分别为49.89%、50.44%、53.41%和48.45%;人工湿地对污染物的处理是物理、化学和生物及其协同作用的过程.人工湿地沿程及不同高度污染物浓度变化试验结果表明,人工湿地系统对污染物的降解沿人工湿地水流方向逐渐降低,污染物主要在人工湿地床体前部被去除,潜流人工湿地床体上部对污染物的去除效果更好.
Taking the reservoir of Yuqing Lake in Jinan as an example, a pretreatment experiment was carried out on the slightly polluted Yellow River water after sand griting by using the horizontal subsurface flow constructed wetland system, and the removal efficiency and its changing trend of pollutants in the wetland system were investigated. At the same time, , The first-order kinetic equation of COD, TN and TP of subsurface flow constructed wetland system was constructed.The results showed that the average removal rates of COD, TP, TN and NH4 + -N in horizontal subsurface flow constructed wetland system were 49.89% and 50.44% 53.41% and 48.45%, respectively.The treatment of pollutants by constructed wetlands is a process of physical, chemical and biological processes and their synergistic effects.The experimental results of pollutant concentration changes along the constructed wetlands and at different heights show that the degradation of pollutants The flow direction of the constructed wetland gradually decreases, and the pollutants are mainly removed in the front of the constructed wetland bed. The upper part of the under-flow constructed wetland bed is better for pollutant removal.