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A Differential Analysis Method and Application of Different Sources of Dissolved Organic Nitrogen in Sewage

A technology of dissolved organic nitrogen and sewage, applied in the direction of testing organic pollutants in water, general water supply saving, testing water, etc., can solve the problems of instrument and parameter condition dependence, distinction, etc., to enhance the universality and simplification of the method. Calculation steps, the effect of reducing the false positive detection rate

Active Publication Date: 2022-06-21
NANJING UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that different source DON discrimination methods in the existing sewage cannot distinguish exogenous DON and endogenous DON at the macroscopic concentration level and molecular composition level at the same time, and improve the existing methods for instruments and DON. The dependence of parameter conditions, and then provide a method and application of different sources of dissolved organic nitrogen in sewage

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  • A Differential Analysis Method and Application of Different Sources of Dissolved Organic Nitrogen in Sewage
  • A Differential Analysis Method and Application of Different Sources of Dissolved Organic Nitrogen in Sewage
  • A Differential Analysis Method and Application of Different Sources of Dissolved Organic Nitrogen in Sewage

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Embodiment 1

[0043] The application object of this embodiment is the effluent of the biological section of a sewage treatment plant A. The daily processing capacity of the A plant is 45,000 cubic meters per day, and the main process is the oxidation ditch process. Its biological section effluent contains COD 25.59mg / L, total nitrogen 7.31mg / L, total phosphorus 0.40mg / L, ammonia nitrogen 0.06mg / L, nitrate nitrogen 2.31mg / L, nitrous nitrogen 0.09mg / L, DON 4.85 mg / L. The steps for the identification of exogenous DON and endogenous DON in the effluent DON of the biological section of Plant A are as follows: figure 1 As shown, a method for the identification and analysis of different sources of dissolved organic nitrogen in sewage is to use liquid chromatography-high resolution mass spectrometry and reactive omics analysis technology to establish the synchronization of exogenous DON and endogenous DON in sewage samples. The qualitative and quantitative methods are established in the following ...

Embodiment 2

[0055] Different from embodiment 1, the application object of this embodiment is the total effluent of a certain sewage treatment plant B, the daily processing capacity of plant B is 150,000 cubic meters / day, and the main water treatment process is A2 / O process + secondary sedimentation tank + Efficient sedimentation tank + quartz sand filter. Its total effluent contains COD 17.32mg / L, total nitrogen 10.95mg / L, total phosphorus 0.10mg / L, ammonia nitrogen 0.33mg / L, nitrate nitrogen 7.47mg / L, nitrite nitrogen 0.04mg / L, DON 3.11mg / L. The steps of distinguishing exogenous DON and endogenous DON in the total effluent DON of plant B are as follows: figure 1 As shown, a method for the identification and analysis of different sources of dissolved organic nitrogen in sewage is to use liquid chromatography-high resolution mass spectrometry and reactive omics analysis technology to establish the synchronization of exogenous DON and endogenous DON in sewage samples. The qualitative a...

Embodiment 3

[0067] Different from embodiment 1, the application object of this embodiment is the effluent of the upgrading and transformation section of a certain sewage treatment plant C. The daily processing capacity of plant C is 60,000 cubic meters per day, and the main water treatment process is an oxidation ditch process. After the standard transformation, a coagulation tank + denitrification filter will be added. The effluent of its upgrading and transformation section has COD 13.13mg / L, total nitrogen 7.34mg / L, total phosphorus 0.03mg / L, ammonia nitrogen 0.16mg / L, nitrate nitrogen 2.94mg / L, nitrite nitrogen 0.06mg / L, DON 4.18mg / L. The steps for the identification of exogenous DON and endogenous DON in the effluent of the upgrading and reformation section of Plant C are as follows: figure 1 As shown, a method and application for the identification and analysis of different sources of dissolved organic nitrogen in sewage is to use liquid chromatography-high-resolution mass spectrom...

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Abstract

The invention discloses a method for discriminating dissolved organic nitrogen from different sources in sewage and its application, and belongs to the field of sewage treatment. The method comprises the following steps: (1) extracting dissolved organic nitrogen in sewage; (2) detecting the solubility Mass spectrum peaks in organic nitrogen extracts; (3) Spectrum data of pretreated sewage samples; (4) Construction of the network relationship of substance reactions in sewage; (5) Screening of substance-reaction relationships of dissolved organic nitrogen; (6) Determine different sources of dissolved organic nitrogen. The method provided by the invention has the advantages of high detection throughput, strong universality, and simple and fast operation. The method can be used to realize the qualitative and quantitative analysis of exogenous and endogenous dissolved organic nitrogen in sewage, and is useful for guiding sewage treatment plants to dissolve The reduction control of sexual organic nitrogen has practical significance.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and more particularly relates to a method and application for the identification and analysis of different sources of dissolved organic nitrogen in sewage. Background technique [0002] Dissolved organic nitrogen (DON) is an important part of total dissolved nitrogen in urban sewage treatment plants, and its effluent concentration is about 0.50mg / L–6.46mg / L, accounting for about 25%–80%. DON in sewage can be used as a precursor of disinfection by-products, which produces carcinogenic disinfection by-products during the disinfection stage. At the same time, DON in effluent from sewage plants can stimulate the growth of algae and cause eutrophication in the receiving water. Therefore, DON in sewage is a problem that cannot be ignored in the process of sewage treatment. In urban sewage treatment plants, DON in sewage can be divided into exogenous DON and endogenous DON according to its source. Exo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/72G01N30/86
CPCG01N30/02G01N30/06G01N30/72G01N30/8679G01N2030/062G01N30/7233G01N30/8686G01N33/1826G01N2030/8872Y02A20/20
Inventor 胡海冬廖可薇任洪强
Owner NANJING UNIV
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