Device and process for treating organic wastewater through combination of pure oxygen strong oxidation contact and deep well A/A/O aeration

Abstract

The invention belongs to the field of organic wastewater treatment, and discloses a device and a process for treating organic wastewater through combination of pure oxygen strong oxidation contact and deep well A / A / O aeration. A pure oxygen strong oxidation contact tank and a deep well A / A / O aeration tank are included; the pure oxygen strong oxidation contact tank is an integrated reaction tank comprising an aeration tank part and a precipitation part; and the deep well A / A / O aeration tank is divided into three grids, namely a first anaerobic part, a second anaerobic part and an aerobic part through partition plates. Organic wastewater enters the pure oxygen strong oxidation contact tank and is subjected to partial pure oxygen aeration in a sealed aeration tank and precipitation separation in a precipitation tank in sequence, biodegradable organic matters in the wastewater are fully degraded through pure oxygen enhanced aeration, and partial nonbiodegradable organic matters are removed through the adsorption effect of biological sludge; and the residual organic matters difficult to biodegrade enter the deep well A / A / O aeration tank, the organic matters are primarily degraded into small molecules in an anaerobic-anoxic manner to improve the biodegradability of the wastewater, and then the wastewater enters an aerobic part to be subjected to pure oxygen aeration to form aerobic activated sludge.

Description

technical field [0001] The invention belongs to the field of organic wastewater treatment, and relates to a device and process for combined treatment of organic wastewater by pure oxygen strong oxidation contact-deep well A / A / O aeration. Background technique [0002] Production wastewater, production sewage, organic wastewater and cooling water, these wastewater and waste liquids produced in the industrial production process contain various industrial production materials, intermediate products, by-products and pollutants produced in the production process that are lost with water. , the composition is complex. Among them, the organic components of organic wastewater are very complex, and the treatment is the most difficult, which has become a pain point in the industry. [0003] At present, the commonly used technical means is to use bentonite to treat organic wastewater, but the effect is poor. It is also decomposed by the biochemical action of microorganisms. During the...

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Problems solved by technology

Obviously, it is not economical to use the "anoxic + aerobic" process as a combined biological treatment process. Moreover, easily biodegradable organic matter and refractory organic matter are treated together, and refractory organic matter is often not treated thoroughly.

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