An ameliorated triple oxidation ditch in Changshu Chenbei wastewater plant was studied in this paper.Process characteristics were narrated as well as its nitrogen and phosphorus removal mechanisms.

• 结合常熟城北污水厂二期工程运行实例,阐述改进型三沟式氧化沟工艺特点及脱氮除磷机理,总结了设计及运行特色。