Control method and device of A2/O oxidation trench technology synchronous nitration and denitrification

A technology of simultaneous nitrification and control device, applied in the field of biological denitrification, can solve the problems of low environment and difficult to control, high energy consumption, low total nitrogen removal efficiency, etc., to solve optimization and control, save carbon source, and solve sewage denitrification The effect of unstable efficiency and low compliance rate

Inactive Publication Date: 2007-04-18
江门市国祯污水处理有限公司
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Problems solved by technology

[0039] The object of the present invention is to provide a 2 / O oxidation ditch process synchronous nitrification and denitrification control method and device, to solve A 2 Excessive aeration in the / O oxidation ditch process leads to low total nitrogen removal efficiency and excessive energy consumption in the biological denitrification process, and overcomes the low DO in the synchronous nitrification and denitrification environment, which is difficult to control, and the long-term neglect of ORP in the aerobic zone. problems, so as to realize the efficient and stable control of simultaneous nitrification and denitrification biological nitrogen removal process

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  • Control method and device of A2/O oxidation trench technology synchronous nitration and denitrification
  • Control method and device of A2/O oxidation trench technology synchronous nitration and denitrification
  • Control method and device of A2/O oxidation trench technology synchronous nitration and denitrification

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Embodiment 1

[0074] Taking the effluent from the aeration grit chamber of a sewage treatment plant in Beijing as the raw water, the influent COD, ammonia nitrogen, total nitrogen and total phosphorus values ​​(COD=251.2~489.4mg / L, NH 4 + =35.5~51.2mg / L, TN=49.4~65.4mg / L, TP=5.4~8.7mg / L). The hydraulic retention time (HRT) of the anoxic zone, the anaerobic zone and the oxidation ditch are 0.5h, 1.5h and 18h ​​respectively, the reflux ratio is 100%, the average flow velocity in the oxidation ditch aeration tank is about 1cm / s, and it takes 5 to 7 minutes. Oxidation-reduction potential (ORP) was used as the control parameter of simultaneous nitrification and denitrification (SND) biological denitrification (SND) in the oxidation ditch process.

[0075] COD, BOD in the test stage 5 , NH 4 +, The average influent concentration of TN is 337.8mg / L, 177.4mg / L, 52.7mg / L and 38.5mg / L, and the average effluent concentration is 45.3mg / L, 12.5mg / L, 13.2mg / L, 4.2mg / L L, the average removal rates w...

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Abstract

The present invention relates to an A2/O oxidation channel process synchronous nitrification and denitrification control method and its equipment, belonging to the field of domestic sewage biodenitrogenation technology. It is characterized by that said method includes the following steps: utilizing DO on-line monitoring apparatus to monitor the macroscopic aerobic-anoxic environment formed in oxidation channel aeration basin; utilizing ORP on-line monitoring apparatus to monitor the microscopic aerobic-anoxic environment formed in oxidation channel aeration basin; and utilizing computer to control frequency conversion air blower to control aeration quantity so as to ensure that the macroscopic and microscopic nitrification reaction and denitrification reaction can be simultaneously implemented.

Description

technical field [0001] A kind of A of the present invention 2 The invention relates to a synchronous nitrification and denitrification control method and device for O oxidation ditch process, which relates to the technical field of denitrification of domestic sewage, especially a kind of biological denitrification. Background technique [0002] Oxidation ditch technology [0003] Oxidation ditch, also known as continuous loop reactor, is a variant of activated sludge process. Oxidation ditch was originally applied in the Netherlands, and now it has become an important sewage treatment technology in Europe, Oceania, South Africa and North America. The rate of adoption of oxidation ditch treatment plants has grown tremendously in recent years. At present, the number of sewage treatment plants with oxidation ditch process in our country is increasing more rapidly, and oxidation ditch process is the preferred process for new sewage treatment plants at home and abroad. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 彭永臻侯红勋王淑莹
Owner 江门市国祯污水处理有限公司
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