Aeration oxidation ditch water treatment device with nested sedimentation tank

The utility model relates to an aeration oxidation ditch water treatment device with a nested sedimentation tank, which comprises a gas stripping tank, a sedimentation tank and an aeration oxidation ditch, the sedimentation tank is nested in the treatment device, the problem that a secondary sedimentation tank needs to be additionally arranged in a common oxidation ditch process is solved, and land and civil engineering cost is saved. In addition, by arranging the nested sedimentation tank, automatic backflow of sludge is achieved, a sludge backflow system does not need to be additionally arranged, energy consumption is reduced, and the operation cost is reduced. 本实用新型涉及一种嵌套沉淀池的曝气氧化沟水处理装置，包括气提池、沉淀池、曝气氧化沟，所述沉淀池嵌套在处理装置中，解决了一般氧化沟工艺需另设二沉池的问题，节省了用地和土建成本。并且通过设置嵌套的沉淀池，实现污泥的自动回流，无需另加污泥回流系统，节约能耗，降低运行成本。