Device and method for deep denitrification and dephosphorization of urban sewage by sludge double return aoa

A technology for deep denitrification of urban sewage, applied in water/sludge/sewage treatment, reflux water treatment, chemical instruments and methods, etc., can solve problems such as difficulty in starting and maintaining short-range nitrification, difficulty in deep denitrification of sewage, etc.

Active Publication Date: 2020-06-16
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

Method used

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  • Device and method for deep denitrification and dephosphorization of urban sewage by sludge double return aoa
  • Device and method for deep denitrification and dephosphorization of urban sewage by sludge double return aoa

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Embodiment Construction

[0023] 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 staggered up and down according to the direction of water flow; the aerobic section (2.4) adopts air pump (2.7), aeration pip...

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Abstract

The invention relates to a device and a method for realizing the deep denitrification and dephosphorization of urban sewage by AOA with double return flow of sludge, belonging to the field of sewage treatment. The device is mainly composed of a raw sewage water tank, a sludge double-reflux AOA reactor composed of anaerobic / anoxic / aerobic cells, and a sedimentation tank. The device mainly includes raw water tank, sludge double return AOA reactor. The sludge double-reflux AOA reactor in the method is sequentially divided into anaerobic section, aerobic section and anoxic section; wherein, the anaerobic section utilizes COD in domestic sewage to synthesize internal carbon source PHAs, and at the same time, anaerobic Release phosphorus; then the mixed solution enters the aerobic section, where short-range nitrification occurs; finally enters the anoxic section, where internal carbon source denitrification occurs. This method gradually increases the ammonia nitrogen load in the influent and starves NOB through long-term anaerobic / anoxic treatment, so as to realize the short-range nitrification and endogenous denitrification denitrification of urban sewage, and achieve the purpose of deep nitrogen and phosphorus removal. The invention is practicable and can solve the problem of difficulty in realizing short-cut nitrification in continuous flow.

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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Patent Type & Authority Patents(China)
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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