Oxygen-enriched reflux sedimentation basin

The utility model discloses an oxygen enrichment refluxing sedimentation tank, which is characterized in that a water inlet end of a main tank body is provided with a strengthening aeration zone, an aeration pipeline is arranged in the strengthening aeration zone, the strengthening aeration zone is communicated with a mixing agitation zone which is communicated with a lifting agitation zone, a condensing sludge discharge zone is disposed at the bottom part of a water outlet side of the main tank body, a blower is arranged at the outside of the main tank body, and the blower is connected with the aeration pipeline. All parts of the utility model are in close fit through pipelines, and have advantages of more reasonable structure and uniform water distribution than other common sedimentation tanks and clarification tanks. An aerating system provides sludge microorganisms in the tank with enough dissolved oxygen to strengthen the biological action. The sedimentation tank can give full play to indexes such as bio