A/O reactor with functions of air lift, backflow as well as rotation and mixing of reflux

Abstract

The invention relates to an A / O reactor with the functions of air lift, backflow as well as rotation and mixing of reflux, comprising a container body. The A / O reactor is characterized in that the container body is formed by that an inner barrel wall and an outer barrel wall are coaxially sheathed and fixed on the same baseplate, and is divided into an inner barrel body and an outer barrel body; the inner barrel wall comprises a cylindrical surface inner barrel wall, a falling-in cone barrel wall and an inner barrel hole; the outer barrel wall comprises a cylindrical surface outer barrel wall, an outward-heeling cone barrel wall and an outer barrel hole; the bottom of the inner barrel wall is provided with a bottom diversion hole; a microporous aerator set is arranged on the bottom of theinner barrel body corresponding to the bottom diversion hole to form an air lift aerobic zone; the upper part of the cylindrical surface inner barrel wall is provided with a plurality of diversion holes, and the upper honeycomb duct is inclined; a solid-liquid separation clarification zone is arranged in the outer barrel body above the upper honeycomb duct; and a solid-liquid separator composed of a cantboard and a V-shaped section annular sludge accelerating subsider are arranged in the solid-liquid separation clarification zone; and an anoxic zone is arranged in the outer barrel body below the solid-liquid separation clarification zone. The invention saves energy, reduces equipment volume, lowers operation cost and reduces land occupation.

Description

technical field [0001] The invention relates to sewage and waste water treatment facilities, in particular to an A / O reactor for air-lift reflux and rotary mixing of reflux liquid. Background technique [0002] A / O method is the abbreviation of Anoxic / Oxic process. In the method, an anoxic biological treatment process is added before the conventional aerobic biological treatment system, so as to achieve the effect of removing nitrogen and phosphorus while removing organic pollutants. In the aerobic biochemical section, microorganisms oxidize and decompose the organic matter in the sewage and wastewater under the condition of sufficient dissolved oxygen, and simultaneously carry out nitrification and phosphorus accumulation reactions, and realize phosphorus removal by discharging excess activated sludge; in the anoxic biochemical section, the aerobic A part of the mixed liquid in the reflux section is mixed with the raw water entering the system, and the nitrifying liquid in...

AI Technical Summary

Problems solved by technology

But at present, the disadvantage of this process is: to return the mixed liquid from the aerobic section to the anoxic section, it is necessary to install power equipment such as a return pump and increase the power consumption. It is also necessary to set up power equipment such as mixers and flow devices, which also increases power consumption.

In addition, the existing solid-liquid separation and clarification area is set independently outside the A / O reactor vessel, so it occupies a large area and requires high construction costs.

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