Integrated high-efficiency oxidation ditch and sewage treatment process thereof

Abstract

The invention relates to an integrated high-efficiency oxidation ditch and a sewage treatment process thereof. The integrated high-efficiency oxidation ditch is characterized by comprising a first annular wall, a second annular wall and an annular sedimentation tank wall with sequentially reducing annular radiuses, wherein an oxidation ditch anoxic region and an oxidation ditch aerobic region are formed between every two annular walls respectively; a peripheral inlet and outlet radial flow type sedimentation tank is positioned in the annular sedimentation tank wall; one side edge of the outer side wall of the first annular wall is provided with an anaerobic tank with a sewage inlet; the first annular wall, the second annular wall and the annular sedimentation tank wall are provided with communicating holes for communicating the anaerobic tank with the oxidation ditch anoxic region, communicating the oxidation ditch anoxic region with the oxidation ditch aerobic region and communicating the oxidation ditch aerobic region with the peripheral inlet and outlet radial flow type sedimentation tank respectively; a suction dredger and a sludge reflux pipe are arranged in the peripheral inlet and outlet radial flow type sedimentation tank for discharging sludge to a sludge reflux pump room; and a water outlet pipe is also arranged in the peripheral inlet and outlet radial flow type sedimentation tank. The integrated high-efficiency oxidation ditch has a simple structure and is favorable for improving the efficiency and the stability of biological denitrification and dephosphorization.

Description

technical field [0001] The invention relates to an oxidation ditch used for urban sewage treatment and a sewage treatment process thereof, in particular to a continuously running oxidation ditch integrating sedimentation and oxidation ditch, which belongs to the field of sewage treatment. [0002] Background technique [0003] In a broad sense, the integrated oxidation ditch refers to the arrangement of an oxidation ditch used as a biochemical treatment and a sedimentation tank or other types of solid-liquid separation facilities built together into the same structure. At present, the integrated oxidation ditch launched by some domestic units mainly includes two types: side ditch type and center island type. Its characteristics are: it integrates the functions of aeration, sedimentation (mud-water separation) and sludge return, and does not set up a separate sedimentation pool. [0004] This technology has the following advantages: it adopts the joint construction method o...

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Problems solved by technology

[0007] In order to overcome the defects of poor phosphorus and nitrogen removal stability, poor precipitation effect and low system efficiency of the traditional integrated oxidation ditch, the present invention provides an integrated high-efficiency oxidation ditch. The integrated high-efficiency oxidation ditch not only has a simple structure and a reasonable design, but also has Conducive to improving the efficiency and stability of biological phosphorus and nitrogen removal

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