针对府河的富营养化水体，旨在设计出府河的脱氮除磷净化工艺系统，使现有五类水质提升为四类水，以缓解白洋淀富营养化现状。通过对国内外常用河道治理工艺方案的选择，确定出以砾石为填料的河道原位砾间接触氧化——潜流人工湿地——前置库逐级净化系统，处理流量20000 m3/d，进水NH3-N、TN、TP浓度分别为14.96、44.40、2.28 mg/l。河道原位处理设计长度1000 m，接触时间6 h(曝气时间3 h，非曝气时间3 h)，气水比3.54:1，春夏秋季出水NH3-N、TN、TP浓度分别为3.74、31.52、2.006 mg/l,去除率达75%、29%和12%；冬季出水NH3-N、TN、TP浓度分别为9.724、33.30、2.06 mg/l, 去除率达35%、25%和9.50%。潜流湿地设计面积53.260hm2，水力负荷4.51 cm/d，春夏秋季HRT 5.9 d，出水NH3-N、TN、TP浓度分别为2.06、7.25、0.923 mg/l,去除率达45%、77%和54%；冬季HRT5.3 d，出水NH3-N、TN、TP浓度分别为5.348、7.659、1.030 mg/l,去除率达45%、77%和50%。经本系统从前置库流出的水全年均达到设计目标。

As one of major rivers flowing into Baiyangdian Lake, Fu River, with flux 20000 m3/d and concentration of NH3-N、TN and TP 14.96、44.40、2.28 mg/l，is facing severe Eutropication problem. This paper aims at improving its water quality to grade IV by designing a nitrogen and phosphorus removal purification system. Step by step process of in-situ biological contact oxidation between graves (BCO), subsurface flow wetland (SW) and pre-dam is presented according to comparison research of different methods commonly used in river purification. Reach purified with BCO is 1000 meters, with air/water ratio 3.54:1 and intermittent aeration.6h (aeration 3h, non-aeration 3h.). The effluent NH3-N、TN and TP are 9.724、33.30、2.06 mg/l in winter and 3.74、31.52、2.006 mg/l in spring、summer and autumn ,with removal efficiencies 5%、25%、9.50% in winter and 75%、29%、12% in other times. Areas of SW are 53.260hm2, with hydraulic loading rate 4.51cm/d and HRT 5.3 d in winter and 5.9d in the rest. The effluent NH3-N、TN and TP are 5.348、7.659、1.030 mg/l in winter and 2.06、7.25 and 0.923 mg/l in the remaining time, with removal efficiencies 45%、77%、50% in winter and 45%、77%、54% in others . Effluent from pre-dam matches the Design Standards well.