人工湿地对暴雨径流中氨氮的去除效果研究

Research for eliminating ammonia and nitrogen in rainstorm run off with artificial wetlands

采用细沙砾石混合填料的人工湿地系统对暴雨径流中氨氮的去除进行模拟研究。结果表明,在停留时间2d,连续进水的情况下,细沙砾石混合填料对氨氮有较好的去除效果,出水氨氮浓度稳定在0.2—0.6mg/L,去除率达到90%以上。并通过实验数据比较得出暴雨径流湿地系统氨氮去除率与湿地坡比、污水停留时间以及进水负荷之间的关系。

Imitating research to eliminate ammonia and nitrogen in rainstorm run off with artificail wetlands formed by filling fine sand, gravel and stone. The result indicates that the effect is good, the density of ammonia and nitrogen out put within 0. 2--0. 6mg/L, eliminating rate arrives at 90% above, after two days under continuously filling water. The relation among the eliminating rate, slope ratio, period waste water staying for a time and the quantity is provided through the test data compared.