人工曝气对垂直潜流人工湿地运行效率的影响

摘要

为了进一步提高人工湿地系统的运行效能,通过设置4组不同曝气强度的单元垂直潜流人工湿地反应器,对基质内人工曝气对湿地运行效率的影响以及在不同温度条件下对保持湿地运行稳定性上的作用进行了试验研究.结果表明:当气水比为6时,反应器内部的溶解氧环境最为适宜,整体的运行效率达到最优,其COD去除率为67.10%,NH3-N去除率为62.08%,TN去除率为60.19%,1P去除率为94.97%;适当的人工曝气能够较好地保持垂直潜流湿地在不同季节条件下的运行稳定性.%In order to promote the practical performance of constructed wetlands, four pilot-scale vertical subsurface flow constructed wetlands with different aeration intensities were installed to study the influences of artificial aeration on the performance of vertical-flow constructed wetlands as well as their function in the steady operation of the constructed wetlands under different temperatures. The results show that when the water-gas ratio is 6, the environment for the dissolved oxygen in the reactors is the most satisfactory, and the whole operation efficiency is the best. The removal rates of COD, NH3-N, TN and TP are 67.10％, 62.08％, 60.19％ and 94.97％, respectively. Suitable artificial aeration can keep the operation stability of the vertical-flow constructed wetlands in different seasons.