Integrated AAO (anaerobic-anoxic-oxic) treatment black water reusing method

Abstract

The invention discloses an integrated AAO (anaerobic-anoxic-oxic) treatment black water reusing method. A sewage treatment device is arranged, and the sewage treatment device comprises a treatment system and a reusing system, wherein the treatment system comprises two parts, namely a well body and a precipitation tank, the well body comprises a shaft, a downward aeration head and a propeller stirrer, the interior of the shaft is divided into two parts by a partition plate, an anaerobic area is arranged on one side, and a water inlet pipe is arranged at the top of the anaerobic area; an oxic area is arranged at the upper part on the other side, an anoxic area is arranged at the lower part on the other side, and the downward aeration head and the propeller stirrer are arranged in the oxic area and the anoxic area; the precipitation tank, a sludge return hole and a water outlet hole are arranged on the periphery of the upper part of the shaft, and a sludge discharge pipe is arranged at the bottom of the precipitation tank; and sewage after treatment flows into a water collection tank through a lifting pump, and water in the water collection tank can complete rinsing of a toilet under the action of gravity flow, flows through a septic tank, overflows through a grille, enters a regulating tank for pretreatment and then re-enters the treatment system, and the treatment and the reusing of black water are finally realized. The method disclosed by the invention has the advantages of high efficiency, environment-friendly property, energy conservation and low cost.

Description

technical field [0001] The invention belongs to the technical field of sewage reuse, and particularly relates to an integrated AAO (abbreviation of the first letter of English Anaerobic-Anoxic-Oxic, ie anaerobic-anoxic-aerobic) black water reuse method. Background technique [0002] At present, a large amount of black water (also known as toilet wastewater) is directly discharged to sewage treatment plants or surface water bodies, which not only wastes a lot of fresh water, but also causes serious water pollution. Therefore, it has become an industry letter to develop energy-saving and efficient black water treatment and reuse processes. problem to be solved. [0003] Biological treatment processes are widely used in sewage treatment plants for simultaneous nitrogen and phosphorus removal due to their economic advantages and biodiversity. The integrated new energy-saving water treatment method has received widespread attention in the industry and has been effectively applie...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the contradiction between the current traditional AAO process and the competition of carbon sources in low carbon-to-nitrogen ratio water treatment, reduce the floor area and odor pollution; at the same time avoid the disadvantages of high energy consumption and inconvenient operation and management in membrane biological treatment technology

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