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Fast detection method for soluble COD in polyether production waste water

A technology for the production of wastewater and detection methods, which is applied in the measurement of color/spectral characteristics, etc., can solve the problems of high price, environmental pollution, and long time consumption, and achieve the effects of fast detection speed, high economic and environmental benefits, and elimination of environmental pollution

Inactive Publication Date: 2019-04-30
TIANJIN CHENGJIAN UNIV
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Problems solved by technology

Although the current routine COD detection method is more accurate in polyether wastewater COD analysis results, it takes a long time, usually more than 2 hours
At the same time, the COD test agents are mainly potassium dichromate, concentrated sulfuric acid, silver sulfate, mercury sulfate, etc. These agents are expensive and will cause serious pollution to the environment

Method used

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  • Fast detection method for soluble COD in polyether production waste water
  • Fast detection method for soluble COD in polyether production waste water
  • Fast detection method for soluble COD in polyether production waste water

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Embodiment

[0031] The present invention is applied to the rapid COD detection of polyether wastewater in a petrochemical sewage treatment plant in Tianjin, including the following steps:

[0032] 1. Establishment of standard curve

[0033] (1) Take multiple samples at the polyether wastewater sampling point of the petrochemical sewage plant, and use the rapid digestion spectrophotometry (HJ / T399-2007) to analyze the polyether wastewater COD;

[0034] (2) For polyether wastewater samples, adjust the pH to 7.0±0.1, remove suspended solids with a 0.45 μm filter membrane, dilute 20 times with deionized water and constant volume to ensure that the UV absorbance is between 0.5-2.5. A full scan of UV-visible light was performed on the diluted water sample ( figure 1 );

[0035] (3) The resulting spectral absorbance and corresponding COD are analyzed by factor analysis and correlation analysis ( figure 2 and Table 1), factor analysis shows that UV 208 and UV 210 Strong correlation with COD...

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Abstract

The invention relates to a fast detection method for soluble COD in polyether production waste water. According to the invention, ultraviolet spectrum fingerprint characteristics of polyether waste water are analyzed, the characteristic spectrum of polyether is found out by combining statistical analysis, and a linear relationship is established with the soluble COD. The fast detection method realizes fast detection for the soluble COD in the polyether waste water. Compared with the conventional COD detection method, the fast detection method can greatly reduce the time cost of COD detection.Meanwhile, the fast detection method can greatly save the cost of COD testing agents, can eliminate the environmental pollution caused by COD detection, and has extremely high economic and environmental benefits.

Description

technical field [0001] The invention belongs to the technical field of sewage detection, and in particular relates to a rapid detection method for soluble COD in polyether production wastewater. Background technique [0002] At present, rapid digestion spectrophotometry (HJ / T399-2007) is commonly used for COD detection of polyether production wastewater in the petrochemical industry, which is used to guide the commissioning and operation management of petrochemical wastewater treatment facilities. Although the current conventional COD detection method is relatively accurate in the COD analysis of polyether wastewater, it takes a long time, usually more than 2 hours. At the same time, the COD test reagents are mainly potassium dichromate, concentrated sulfuric acid, silver sulfate, mercury sulfate, etc. These reagents are expensive and will cause serious pollution to the environment. Therefore, on the premise of ensuring the accuracy of the COD test, how to shorten the COD t...

Claims

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Application Information

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IPC IPC(8): G01N21/33
CPCG01N21/33
Inventor 王栋黄宝华季民孙力平王少坡于静洁
Owner TIANJIN CHENGJIAN UNIV
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