人工快速渗滤系统去除氨氮研究

在土地处理的基础上,运用人工快速渗滤系统改善微污染河水水质,研究了不同温度和不同深度处3种滤料对氨氮的去除效果。结果表明,人工快速渗滤系统具有良好的去除氨氮能力,氨氮的去除率随着有效粒径的增大而减小,但影响不明显;去除效果主要在表层50 cm处;温度对去除效果影响不明显,夏季和冬季的去除率基本一致,氨氮的去除率主要受溶解氧限制。人工快速渗滤系统可以用于去除微污染河水中的氨氮。

Study on Ammonium-nitrogen Removal by Artificial Rapid Infiltration System

The removal effects of 3 kinds of filter material at different depth and different temperature on ammonium-nitrogen were studied by artificial rapid infiltration system to improve the slightly polluted river water on the basis of land treatment.The result showed that the artificial rapid infiltration system had good ammonium-nitrogen removal ability.The average removal rate of the 3 kinds of filter material was 59.04%,60.43% and 68.19%,resp.The ammonium-nitrogen removal rate was decreased with the increasing effective grain size,but the effect was not obvious.The removal effect was mainly at the 50 cm of the topsoil layer.The removal effect was not affected obviously by temperature and the removal rate in summer and that in winter was basically identical.The ammonium-nitrogen removal rate was mainly restricted by the dissolved oxygen.The artificial rapid infiltration system could be used to remove the ammonium-nitrogen in the slightly polluted river.