Device and method for biological intensified shortcut biological nitrogen removal of municipal sewage

A technology for urban sewage and biological denitrification, which is applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. Short-range nitrification is stable, easy to achieve and maintain, and the effect of increasing nitrification rate

Active Publication Date: 2012-06-06
彭永臻 +1
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Problems solved by technology

[0004] However, the stable realization of short-cut nitrification of urban sewage is still a recognized problem, especially in continuous reactors to achieve stable short-cut nitrification and denitrification, so the actual engineering application of short-cut nitrification of urban sewage is rarely reported

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  • Device and method for biological intensified shortcut biological nitrogen removal of municipal sewage
  • Device and method for biological intensified shortcut biological nitrogen removal of municipal sewage

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Embodiment Construction

[0029] Below in conjunction with accompanying drawing and embodiment the present invention will be further described: as figure 1 As shown, the urban sewage bioenhanced short-range biological denitrification device is equipped with urban sewage raw water tank 1, urban sewage AO reactor 2, urban sewage secondary sedimentation tank 3, sludge digestion liquid raw water tank 4, and sludge digestion liquid AO reactor 5. Secondary settling tank for sludge digestion liquid 6;

[0030] The urban sewage raw water tank 1 is an open box body, which is provided with an overflow pipe 1.1 and a vent pipe 1.2; the urban sewage raw water tank 1 is connected with the urban sewage AO reactor water inlet valve 2.2 through the inlet pump 2.1;

[0031] The urban sewage AO reactor is an open pool body, which is divided into several compartments. According to the direction of water flow, flow holes are arranged up and down to connect each compartment. 2.9 and stirring paddle 2.3, the rear end is pr...

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Abstract

The invention provides a device and method for biological intensified shortcut biological nitrogen removal of municipal sewage. The device comprises a municipal sewage raw water tank, a municipal sewage anaerobic-oxic (AO) reactor, a municipal sewage secondary sedimentation tank, a sludge digestion liquid raw water tank, a sludge digestion liquid AO reactor and a sludge digestion liquid secondarysedimentation tank, wherein the municipal sewage secondary sedimentation tank is a radial flow sedimentation tank; and the sludge digestion liquid secondary sedimentation tank is a vertical flow sedimentation tank. The method is as follows: carrying out shortcut nitrification on sludge digestion liquid through inhibition of low dissolved oxygen (DO is 0.5-1mg / L) and free ammonia (FA); and adding the excess sludge in a sludge digestion liquid shortcut nitrification system to a municipal sewage shortcut nitrification system, and simultaneously maintaining the low dissolved oxygen of the system (DO is 0.3-0.8mg / L), thereby stably achieving the efficient shortcut nitrification of the municipal sewage. By using the method, the shortcut nitrification and denitrification can be achieved, aeration energy consumption is saved, carbon source requirement for denitrification is reduced, sludge yield is reduced, and simultaneously, the volume load of the municipal sewage shortcut nitrification system is improved and the shock resistance capability of the system is enhanced.

Description

technical field [0001] The invention relates to a device and method for biologically enhanced short-range biological denitrification of urban sewage, which belongs to the technical field of sewage biological treatment and is suitable for denitrification treatment of urban sewage. Background technique [0002] The country has increasingly stringent requirements on the nitrogen content of the effluent of urban sewage treatment plants, especially the requirements on the TN concentration of the effluent in recent years. Traditional biological denitrification technology uses nitrifying bacteria and denitrifying bacteria to achieve nitrogen removal, and sufficient carbon source is the key to efficient denitrification by denitrification. When the C / N ratio of raw water is lower than 3.4, the carbon source of raw water cannot meet the demand of organic carbon source for denitrification, and an external carbon source needs to be added to meet this requirement to ensure the effect of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 彭永臻马斌张树军张亮王俊敏
Owner 彭永臻
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