Three-stage circulation aerobic reactor

Abstract

The invention discloses a three-stage circulation aerobic reactor, which comprises a pond body, wherein the inside of the pond body is partitioned into a conical sewage expansion area, an aerobic reaction area, an anaerobic reaction area and a sediment filtering layer from bottom to top in sequence; the upper part of the aerobic reaction area is provided with a primary gas-solid-liquid separation area; the upper part of the anaerobic reaction area is provided with a secondary gas-solid-liquid separation area; three-phase separators are respectively arranged in the primary gas-solid-liquid separation area and the secondary gas-solid-liquid separation area; a water outlet weir is arranged above the sediment filtering layer; a water outlet pipe is arranged on the water outlet weir; the top of the pond body is provided with a double-stage circular reflowing system; the double-stage circular reflowing system comprises an air-lift pipe, a gas-liquid separating tank and a lower layer reflowing pipe; an upper layer reflowing pipe is arranged between the secondary gas-liquid separation area and the sediment filtering layer; and the upper layer reflowing pipe is connected with an aeration air inlet pipe arranged above the pond body. The reactor is provided with a three-stage circular reflowing system, and has the characteristics of rapid start of flocculent sludge, high impact load resistance, low requirement on the PH value of inflow water, high particle sludge increasing speed, low energy consumption, high treating efficiency and stable water yielding quality.

Description

technical field [0001] The invention relates to an aerobic reactor used in the biochemical treatment stage in the treatment of municipal and industrial sewage, and belongs to the technical field of aerobic reactors. Background technique [0002] The various aerobic reaction technologies currently used at home and abroad are mainly activated sludge method, SBR, CASS, A / 0, A / A / O, A / A / A / O, etc. Generally, the depth of the pool is less than 6 meters. The COD volume load is usually less than 1kgCOD.m3.d, and flocculent sludge is used during startup and operation. The above technology covers a large area, requires a large investment, has a long construction period and complicated operation and management, and is difficult to apply to sewage with high-concentration water quality and poor biodegradability. SUMMARY OF THE INVENTION [0003] Aiming at the shortcomings of the existing aerobic biological reaction technology, the invention provides a kind of high impact load resistanc...

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Problems solved by technology

[0003] The present invention aims at the deficiencies of the existing aerobic biological reaction technology, and provides a kind of anti-shock load capacity, low energy consumption, which can be started by flocculent sludge, and can quickly generate aerobic granular sludge during operation, which can effectively A three-stage circulating aerobic reactor that solves ammonia nitrogen and can reduce sludge

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