人工快速渗滤系统氨氮去除机理

The removal mechanism of ammoniac nitrogen in constructed rapid infiltration system

通过对稳定运行的快渗池采样监测和利用室内人工土柱法研究了渗滤系统中氨氮、硝氮的分布和转化，探讨了人工快速渗滤系统（CRI）中氨氮的去除机理．结果显示，在布水期，人工快速渗滤系统中主要发生吸附反应，吸附态氨氮主要集中在0～50cm砂层；在落干期，吸附态氨氮发生硝化反应，在下一次布水时硝氮随水流排出；系统的反硝化能力较弱，总氮的去除率也较低．

The removal mechanism of ammoniac nitrogen in constructed rapid infiltration system was studied utilizing the method of indoor artificial sand column; and the removal mechanism of ammoniac nitrogen in constructed rapid infiltration system was explored. The adsorption reaction was mainly occurred during the flooding period, the adsorbed ammoniac nitrogen mainly concentrated in the sand layer between 0～50cm in depth; the adsorbed ammoniac nitrogen was nitrified during the drying period, and the nitric nitrogen was washing away during the next flooding period; the system＇s denitrification capacity was weak, and the removal rate of total nitrogen was also low.