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Device and method for realizing deep nitrogen and phosphorus removal of urban sewage through sludge double reflux AOA

A technology for urban sewage and deep denitrification, which is applied in water/sludge/sewage treatment, return water treatment, chemical instruments and methods, etc. It can solve the problems of difficulty in starting and maintaining short-range nitrification, and difficulty in deep denitrification of sewage.

Active Publication Date: 2017-07-11
BEIJING UNIV OF TECH
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Problems solved by technology

[0007] Aiming at the current problems of difficulty in starting and maintaining short-cut nitrification, and difficulty in deep denitrification of sewage

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  • Device and method for realizing deep nitrogen and phosphorus removal of urban sewage through sludge double reflux AOA
  • Device and method for realizing deep nitrogen and phosphorus removal of urban sewage through sludge double reflux AOA

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Embodiment Construction

[0024] A system for realizing short-path nitrification and endogenous denitrification of urban sewage through the sludge double-return AOA process, which is characterized in that it includes a sequentially connected urban sewage tank (1), a sludge double-return AOA reactor (2), and a sedimentation tank ( 3); the urban sewage raw water tank (1) includes an overflow pipe (1.1) and an emptying pipe (1.2); the urban sewage raw water tank (1) passes through the water inlet pipe (2.1) and the water inlet pump (2.1) and the sludge double return AOA The reactors (2) are connected; the sludge double-reflux AOA reactor (2) includes 8 compartments, which are divided into two anaerobic sections, two aerobic sections, and four anoxic sections according to the direction of water flow. The occurrence of flow phenomenon, each compartment is connected by water flow holes that stagger up and down according to the direction of water flow; the aerobic section (2.4) adopts air pump (2.7), aeration ...

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Abstract

The invention discloses a device and method for realizing deep nitrogen and phosphorus removal of urban sewage through sludge double reflux AOA and belongs to the field of sewage treatment. The device mainly comprises a raw sewage tank, a sludge double reflux AOA reactor composed of anaerobic / anoxic / aerobic grids and a sedimentation tank. The device mainly comprises the raw sewage tank and the sludge double reflux AOA reactor. The sludge double reflux AOA reactor is orderly divided into an anaerobic section, an anoxic section and an aerobic section. In the anaerobic section, COD in domestic sewage is used for synthesis of an internal carbon source PFAs and simultaneously, anaerobic phosphorus release is carried out. The mixed solution obtained by the anaerobic section enters the aerobic section and undergoes a shortcut nitrification reaction. The reaction product enters the anoxic section and undergoes an internal carbon source denitrification reaction. The NOB is subjected to starvation treatment by gradually increasing the load of ammonia and nitrogen in inlet water and the long-term anaerobic / anoxic treatment so that urban sewage short-range nitrification internal source denitrification is realized and deep nitrogen and phosphorus removal are realized. The device and method are practicable and can solve the problem that the continuous flow short-range nitrification is difficult.

Description

technical field [0001] The invention relates to a control method for realizing short-range nitrification and endogenous denitrification of urban sewage through a sludge double-reflux AOA process, and belongs to the application field of continuous flow activated sludge method. Background technique [0002] In recent years, the phenomenon of "water body eutrophication" caused by excessive nitrogen in water has become more and more serious. Due to the increasingly stringent sewage discharge standards, the field of sewage treatment has also brought major challenges. The sewage treatment technology has entered the stage of simultaneous decarbonization and deep nitrogen and phosphorus removal from the single COD removal stage. In recent years, my country has invested a lot of money to control the eutrophication of water bodies. Although there are many sewage treatment processes, it is still necessary to develop processes or new methods to achieve deep denitrification and phosphor...

Claims

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Application Information

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IPC IPC(8): C02F3/30
CPCC02F3/301C02F3/305C02F3/307C02F2209/08C02F2209/16C02F2301/04
Inventor 彭永臻张婷丁鹏霖王淑莹
Owner BEIJING UNIV OF TECH
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