人工湿地处理富营养化地表水体的研究

针对地表水体富营养化越来越突出的问题,采用以碎石为基质、以芦苇为植物的人工湿地,对模拟污水进行实验研究,考察了人工湿地对COD、氨氮和无机磷的去除性能。结果表明,人工湿地对COD和无机磷的去除率分别为84.78%和82.37%,对氨氮去除率仅达到67.50%,其主要原因在于反硝化过程碳源不足制约了脱氮效果。

The problem of eutrophication of surface water is becoming more and more prominent.A constructed wetland with breakstones as matrix and Phragmites australiss as plants was used to treat synthetic wastewater.The removal performance of COD,ammonia nitrogen and inorganic phosphorus by constructed wetland was investigated.The results showed that the removal efficiencies of COD and inorganic phosphorus in constructed wetlands were 84.78%and 82.37%respectively.However,the removal efficiency of ammonia nitrogen was only 67.50%.The main reason was that the lack of carbon source for denitrification process restricted nitrogen removal.