摘要：

以实际城市生活污水为处理对象，应用改良UCT分段进水工艺研究反硝化除磷的实现途径与维持方法，探讨工艺运行参数对反硝化除磷性能的影响，并分析了强化缺氧吸磷对提高系统脱氮除磷效率的作用和稳定维持反硝化除磷的控制策略。结果表明，通过A/O分段进水工艺向改良UCT分段进水工艺运行方式的转变，可以成功富集反硝化聚磷菌，最高比例达39.2%，污泥缺氧吸磷速率为3.19～4.48 mg P·（g VSS）^-1·h^-1。缺氧/好氧吸磷速率和磷去除率随厌氧池体积的增加而增加，最佳体积分配为34/102/204 L（1/3/6）。控制污泥回流和内循环分别为100%

Abstract:

Denitrifying phosphorus removal was stably achieved with a biological step feed nutrient removal process from real municipal wastewater.The effects of operational parameters on the denitrifying phosphorus removal and the improvement of nutrient removal by intensifying anoxic phosphorus uptake as well as control strategies about maintenance of denitrifying phosphorus removal in the modified University of Cape Town（UCT）step feed process were discussed.The results indicated that denitrifying accumulating bacteria（DPAOs）could be successfully enriched with the maximum proportion and anoxic phosphorus uptake rate of 39.2% and 3.19—4.48 mg P·（g VSS）^-1·h^-1 respectively，according to the process shift from the A/O model to the modified UCT model.Both anoxic and aerobic phosphorus uptake rates and phosphorus removal efficiency increased with the increase of anaerobic volumes，and the optimum anaerobic/anoxic/oxic volume distribution was 34/102/204L（1/3/6）.When the sludge return ratio and internal recycle ratio were respectively set at 100% and 75%，