Wastewater treatment system based on A2/O process

Abstract

The invention discloses a wastewater treatment system based on an A2 / O process. The wastewater treatment system comprises a first-stage physicochemical treatment area, a second-stage biochemical treatment area and a third-stage advanced treatment area which are sequentially arranged in the water flow direction. The first-stage physicochemical treatment area comprises a sedimentation tank and a grid filter, and a plurality of detachable filter plates are arranged in the grid filter. The second-stage biochemical treatment area sequentially comprises an anaerobic tank, an anoxic tank, an aerobictank and a secondary sedimentation tank, the bottom of the secondary sedimentation tank is provided with a sludge reflux inlet, the sludge reflux inlet is communicated with the anaerobic tank througha first pipeline, and the top of the aerobic tank is provided with an aerator. The three-stage advanced treatment area sequentially comprises an ozone reaction tank, a filler tank and a discharge tank, the bottom of the ozone reaction tank is connected with an ozone generator, and the filler tank is filled with elastic filler. By arranging the three stages of wastewater treatment areas, wastewaterof different degrees can be treated respectively, the application range is wide, the treatment effect is good, and the environment is not polluted.

Description

Technical field[0001]The present invention relates to the technical field of sewage treatment, in particular to an A2 / O process wastewater treatment system.Background technique[0002]With the development of the national economy, the discharge of wastewater has become more and more diverse, causing great damage to natural water bodies. In particular, excessive discharge of nitrogen and phosphorus is the main culprit causing red tides and water blooms in water bodies. Therefore, the country has continuously improved the requirements for drainage standards, and has put forward higher and higher requirements for the discharge of nitrogen and phosphorus.[0003]Existing wastewater treatment processes include A2 / O sewage treatment process, A2 / O method, also known as AAO method, is the abbreviation of the first letter of English Anaerobic-Anoxic-Oxic (Anaerobic-Anoxic-Aerobic Method). It is a commonly used sewage treatment process and can be used for secondary sewage treatment or three Grade ...

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Problems solved by technology

[0003] Existing wastewater treatment processes include A 2 / O sewage treatment process, A 2 The / O method, also known as the AAO method, is the abbreviation of the first letter of the English Anaerobic-Anoxic-Oxic (anaerobic-anoxic-aerobic method). It is a commonly used sewage treatment process and can be used for secondary sewage treatment or tertiary sewage treatment. Level sewage treatment, and reclaimed water reuse, A 2 The / O process can simultaneously remove nitrogen and phosphorus, and the total hydraulic retention time is less than other types of processes, but A 2 It is difficult to improve the phosphorus and nitrogen removal effect of the / O process, and it is increasingly unable to meet the discharge water quality standards

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