跌水曝气高度、流量与复氧量关系研究

人工湿地床体内部缺氧是限制其去污效果的关键因素，而跌水曝气是改善人工湿地床体内溶解氧状况的有效措施之一。跌水曝气复氧效果和跌水高度及跌水流量有关。通过增大跌水高度增加曝气时间，从而使复氧量增加。但复氧量的增加趋势随跌水高度的增加而逐渐平缓，在2．5m左右能达到较好的跌水曝气效果。此外，设置更多更细的出水管道湿地出水变细流可以增加复氧面积，也有利于复氧。

Study on Relationship among Waterfall Aeration Height , Flux and Reoxygenation Content

The availability of oxygen in the bed matrix is often assumed to be the key factor restricting the removal rates of pollutants in constructed wetland.Waterfall reoxygenation is one effective operations increasing dissolved oxygen levels of the wastewater.The waterfall height and flux influence oxygen transfer rate.Increasing reoxygenation time by raising waterfall height can enhance reoxygenation efficiency.But the tendency of reoxygenation increasing gradually smooth down while waterfall height raising.2.5meter is a suitable height for a good reoxygenation efficiency.Increasing reoxygenation surface area by splitting stream also can enhance reoxygenation efficiency.