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
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[0031] The invention is applied to the rapid detection of COD in polyether wastewater from a petrochemical sewage treatment plant in Tianjin, and includes the following steps:
[0032] 1. The establishment of standard curve
[0033] (1) Take multiple samples at the polyether wastewater sampling point of the petrochemical sewage plant, and analyze the COD of the polyether wastewater by rapid digestion spectrophotometry (HJ / T399-2007);
[0034] (2) Polyether wastewater water sample, adjust pH=7.0±0.1, remove suspended solids with 0.45μm filter membrane, dilute 20 times with deionized water and set the volume to ensure that the UV absorbance is between 0.5-2.5. Perform a full scan of ultraviolet and visible light on the diluted water sample ( figure 1 );
[0035] (3) Factor analysis and correlation analysis of the obtained spectral absorbance and corresponding COD ( figure 2 And Table 1), factor analysis shows UV 208 And UV 210 Strong correlation with COD, correlation an...
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