Method for treating high ammonia nitrogen wastewater by two-stage A/O process

A high ammonia nitrogen, process technology, applied in aerobic and anaerobic process treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve high operating costs, reduce internal return flow, and many structures and other problems, to achieve the effect of saving operating costs, reducing operating costs, and fewer structures

Inactive Publication Date: 2011-05-04
YANKUANG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The problem to be solved by the present invention is to provide a two-stage A / O process technology to overcome the problem of treating sewage with high ammonia nitrogen and low carbon-to-nitrogen ratio and high requirements for effluent water quality; making full use of incoming water carbon sources and reducing the addition of supplementary carbon sources Amount, make full use of the alkalinity produced by denitrification, reduce the dosage of alkali, reduce the internal return flow, reduce the power of operating equipment, so as to save operating costs, and solve the existing sewage treatment process with many structures and high investment , complex management, high operating costs, and low denitrification efficiency

Method used

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  • Method for treating high ammonia nitrogen wastewater by two-stage A/O process
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  • Method for treating high ammonia nitrogen wastewater by two-stage A/O process

Examples

Experimental program
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Effect test

Embodiment 1

[0039] The water quality of this process is:

[0040] PH: 6~9 CODcr: 100-500mg / L NH 3 -N: 100-300mg / L

[0041] The sewage from the plant area first passes through the grille 1 to remove the larger floating matter, and then enters the homogenization tank 11; in the homogenization tank 11, it is mechanically uniformly stirred to prevent the deposition of suspended matter. If the sewage volume is too large, the sewage enters the homogenization tank. The overflow in front of the pool enters the accident adjustment tank 12, if the sewage water quality suddenly changes greatly, the sewage going to the homogenization tank after passing through the grid 1 is directly switched to the accident adjustment tank 12, and then evenly raised to homogeneity by the small flow pump Pool 11: The sewage flows into the first stage anoxic tank (A1 tank) 21 after being evenly stirred by the homogenization tank 11. The methanol residue is added to 21 and stirred evenly. The control period is 8h, and the DO...

Embodiment 2

[0044] The water quality of this process is:

[0045] PH: 6~9 CODcr: 100-500mg / L NH 3 -N: 100-300mg / L

[0046] The sewage from the plant area first passes through the grille 1 to remove the larger floating matter, and then enters the homogenization tank 11; in the homogenization tank 11, it is mechanically uniformly stirred to prevent the deposition of suspended matter. If the sewage volume is too large, the sewage enters the homogenization tank. The overflow in front of the pool enters the accident adjustment tank 12, if the sewage water quality suddenly changes greatly, the sewage going to the homogenization tank after passing through the grid 1 is directly switched to the accident adjustment tank 12, and then evenly raised to homogeneity by the small flow pump Tank 11: The sewage flows into the first stage anoxic tank (A1 tank) 21 after being evenly stirred by the homogenization tank 11. The methanol residue is added to 21 and stirred evenly. The control period is 13h, and the D...

Embodiment 3

[0049] The water quality of this process is:

[0050] PH: 6~9 CODcr: 100-500mg / L NH 3 -N: 100-300mg / L

[0051] The sewage from the plant area first passes through the grille 1 to remove the larger floating matter, and then enters the homogenization tank 11; in the homogenization tank 11, it is mechanically uniformly stirred to prevent the deposition of suspended matter. If the sewage volume is too large, the sewage enters the homogenization tank. The overflow in front of the pool enters the accident adjustment tank 12, if the sewage water quality suddenly changes greatly, the sewage going to the homogenization tank after passing through the grid 1 is directly switched to the accident adjustment tank 12, and then evenly raised to homogeneity by the small flow pump Pool 11: The sewage flows into the first stage anoxic tank (A1 tank) 21 after being uniformly stirred by the homogenization tank 11. Add methanol residue in 21 and stir evenly. The control cycle is 16h, and the DO is 0.2mg...

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Abstract

The invention provides a technical method for treating high ammonia nitrogen wastewater by a two-stage A / O process. The two-stage A / O process is divided into four stages, namely an anoxic stage, an aerobic stage, an anoxic stage and an aerobic stage; according to different adaptive conditions of nitrosomonas and nitrobacteria, dissolved oxygen, pH value and sludge age are controlled in an O1 tank to form nitrosomonas advantages, and NH3-N is mainly nitrified into NO2- to realize short range nitration; a part of mixed solution of the O1 tank refluxes to an A1 tank; aqueous carbon source and supplied methanol residue or thin methanol are used as carbon sources for denitrification; methanol residue or thin methanol is supplied in an A2 tank and used as a carbon source for implementing denitrification; high dissolved oxygen is controlled at the O2 stage; and the residual methanol and the rest organic substances in the sewage are further oxidized, and the residual NO2--N is further nitrified to improve the performance of active sludge.

Description

Technical field [0001] The invention provides a technical method for treating wastewater containing high ammonia nitrogen, and belongs to the technical field of sewage treatment. Background technique [0002] At present, the treatment methods of ammonia nitrogen wastewater include physical, chemical and biological methods. Biological treatment is the most economical and common method. In municipal sewage with low ammonia nitrogen content, the A / O process, oxidation ditch process, intermittent activated sludge process and biological aerated filter process can effectively remove ammonia nitrogen and total nitrogen, but for the nitrogen fertilizer industry, high ammonia nitrogen is low. For sewage with carbon to nitrogen ratio, the above processes have limitations. The recently studied short-cut nitrification and denitrification process is still in the research stage. Due to conditions, it has not been able to achieve engineering applications. Here are a few common techniques. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30
Inventor 俎宇刘昭斌袁栋材陈香柏王晓辉程传振孙素琴涂万辉李明华
Owner YANKUANG GRP CO LTD
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