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Method for discriminating different-source soluble organic nitrogen in sewage and application

A technology of dissolved organic nitrogen and sewage, applied in the direction of testing organic pollutants in water, general water supply conservation, testing water, etc. adaptability, and the effect of improving applicability

Active Publication Date: 2021-09-21
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Method for discriminating different-source soluble organic nitrogen in sewage and application
  • Method for discriminating different-source soluble organic nitrogen in sewage and application
  • Method for discriminating different-source soluble organic nitrogen in sewage and application

Examples

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Embodiment 1

[0043] The application object of this embodiment is the effluent of the biological section of a certain sewage treatment plant A. The daily treatment capacity of the plant A is 45,000 cubic meters per day, and the main process is the oxidation ditch process. The effluent from the biological stage contains 25.59mg / L of COD, 7.31mg / L of total nitrogen, 0.40mg / L of total phosphorus, 0.06mg / L of ammonia nitrogen, 2.31mg / L of nitrate nitrogen, 0.09mg / L of nitrite nitrogen, and DON 4.85 mg / L. The steps to distinguish 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 technology and reaction omics analysis technology to establish the synchronization of exogenous DON and endogenous DON in sewage samples. Qualitative and quantitative methods, ...

Embodiment 2

[0055] The difference from Example 1 is that the application object of this example is the total effluent of a sewage treatment plant B. The daily treatment capacity of Plant B is 150,000 cubic meters per day, and the main water treatment process is A2 / O process + secondary sedimentation tank + Efficient sedimentation tank + quartz sand filter. The 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 to distinguish 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 technology and reaction omics analysis technology to establish the synchronization of exogenous DON and endogenous DON in sewage samples. Qualitativ...

Embodiment 3

[0067] The difference from Example 1 is that the application object of this example is the effluent of the upgrading section of a certain sewage treatment plant C. The daily treatment capacity of the C plant is 60,000 cubic meters per day, and the main water treatment process is the oxidation ditch process. Coagulation pond + denitrification filter will be added after standard transformation. The effluent COD of the upgrading section is 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 identification and analysis steps of exogenous DON and endogenous DON in the effluent of the upgrading section of plant C are as follows: figure 1 As shown, a method and application of discriminating and analyzing different sources of dissolved organic nitrogen in sewage is based on the relationship between exogenous DON and endogenous DON in sewage samples established by using liquid...

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Abstract

The invention discloses a method for discriminating different-source soluble organic nitrogen in sewage and application, and belongs to the field of sewage treatment.The method comprises the following steps of: (1), extracting the soluble organic nitrogen in the sewage; (2) detecting a mass spectrum peak in the soluble organic nitrogen extracting solution; (3) pretreating spectrogram data of the sewage sample; (4) constructing a network relationship of substance reaction in the sewage; (5) screening the substance reaction relationship of the soluble organic nitrogen; and (6) determining different sources of soluble organic nitrogen. The method provided by the invention has the advantages of high detection flux, strong universality and simplicity, convenience and rapidness in operation, can realize qualitative and quantitative determination of exogenous and endogenous soluble organic nitrogen in sewage, and has practical significance for guiding reduction control of soluble organic nitrogen in a sewage treatment plant.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and more specifically relates to a method for distinguishing and analyzing different sources of dissolved organic nitrogen in sewage and its application. Background technique [0002] Dissolved organic nitrogen (DON) is an important part of dissolved total 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 can produce carcinogenic disinfection by-products during the disinfection stage. At the same time, DON in sewage plant effluent can stimulate the growth of algae and cause eutrophication of 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. Exogenous DO...

Claims

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Application Information

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Patent Type & Authority Applications(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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