In the SSF unit, the average removal efficiencies of NH4+- N, NO3--N and TN are 28.5%, 33.5%and 22.4%, respectively.

• 有植物系统的潜流和表流区除氮效果较为明显；潜流区对氨氮、硝氮和总氮的平均去除率分别达28.；5%25、33