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Sludge side treatment-based urban sewage short-cut nitrogen removal method

A technology for urban sewage and sludge treatment, which is applied in the fields of sludge treatment, water/sludge/sewage treatment, biological water/sewage treatment, etc. The effect of low demand, reduced operating costs, and reduced dosage

Active Publication Date: 2015-04-15
BEIJING UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that it is difficult to control the growth of nitrite oxidizing bacteria in the existing urban sewage treatment. Based on the selective sterilization effect of nitrite, a method for realizing short-range denitrification of urban sewage based on sludge side treatment is proposed. , the method firstly uses the organic carbon source in the raw water to denitrify the denitrifying bacteria in the anoxic zone to reduce the nitrite nitrogen in the reflux nitrification liquid and the reflux sludge to nitrogen, and then the ammonia oxidizing bacteria oxidize the ammonia in the aerobic zone The reaction removes the ammonia nitrogen in the sewage; transports part of the return sludge to the sludge treatment reactor, and uses nitrite for treatment to inactivate the nitrite oxidizing bacteria, so as to control the nitrite oxidizing bacteria in the activated sludge purpose of quantity

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Embodiment Construction

[0019] Below in conjunction with accompanying drawing and embodiment the present invention will be further described: as figure 1 As shown, the short-range denitrification device for urban sewage based on sludge side treatment is equipped with an urban sewage raw water tank (1), a bioreactor (2), a secondary settling tank (3), and a sludge treatment reactor (4); The sewage raw water tank (1) is an open box body with an overflow pipe (1.1) and a vent pipe (1.2); the urban sewage raw water tank (1) passes through the water inlet pump (2.1) and the bioreactor water inlet pipe (2.2 ) are connected; the bioreactor (2) is divided into 7 compartments, and flow holes are arranged staggered up and down according to the direction of water flow to connect each compartment; the first 3 compartments are the anoxic zone, and the last 4 compartments are the aerobic zone The anoxic zone is stirred and mixed by the agitator (2.10); the aerobic zone is aerated by an air compressor (2.8), a gas ...

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Abstract

The invention discloses a sludge side treatment-based urban sewage short-cut nitrogen removal method. Urban sewage first enters into a bioreactor anoxic zone, organic compounds in sewage are used as denitrification carbon sources for reduction of nitrite nitrogen in a recycling nitrification liquor into nitrogen, then the sewage enters into an aerobic zone, ammonia oxidizing bacteria oxidizes ammonia nitrogen in to nitrite nitrogen; sludge age can be controlled by regular discharge of excess sludge, part of recycling sludge is treated by nitrite, and refluxed into a bioreactor, nitrite oxidizing bacteria in activated sludge can be controlled by treatment of part of the recycling sludge, systematic and stable shortcut nitrification can be maintained, continuous-flow urban sewage short-cut nitrogen removal by denitrification can be finally realized, and the sewage processing energy consumption can be reduced.

Description

technical field [0001] The invention relates to a method for realizing short-range denitrification of urban sewage based on sludge side treatment, and belongs to the technical field of sewage biological treatment. Background technique [0002] The removal of nitrogen pollutants in urban sewage plays an important role in the control of water eutrophication. At present, most urban sewage treatment plants adopt the traditional nitrification and denitrification biological denitrification process. The technical principle of this process is to convert ammonia nitrogen into nitrate nitrogen through the action of ammonia oxidizing bacteria in the aerobic zone, and then reduce the nitrate nitrogen to nitrate nitrogen in the anoxic zone. Nitrogen, so as to achieve the purpose of removing nitrogen in sewage. Recent studies have found that the short-range nitrification and denitrification technology that oxidizes ammonia nitrogen to nitrite nitrogen in the aerobic zone, and then direct...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F11/00
CPCC02F3/301C02F11/00
Inventor 马斌彭永臻委燕
Owner BEIJING UNIV OF TECH
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