Spectral analysis method capable of measuring chemical oxygen demand and biochemical oxygen demand in waste water simultaneously

A technology of waste water and standard method, applied in the direction of material analysis, analysis material, measuring device by optical means, can solve the problem of time-consuming and other problems, and achieve the effect of improving quality and efficiency, good reproducibility and high precision

Inactive Publication Date: 2010-12-08
杨季冬
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Problems solved by technology

This method takes a long time due to the pretreatment of the water sample

Method used

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  • Spectral analysis method capable of measuring chemical oxygen demand and biochemical oxygen demand in waste water simultaneously
  • Spectral analysis method capable of measuring chemical oxygen demand and biochemical oxygen demand in waste water simultaneously
  • Spectral analysis method capable of measuring chemical oxygen demand and biochemical oxygen demand in waste water simultaneously

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Embodiment 1

[0033] A method for simultaneous determination of COD and BOD in wastewater,

[0034] a. Collect water samples

[0035] Wastewater samples were collected from a domestic sewage station in Fuling, Chongqing, and 120 water samples were taken using glassware at 10 different water intake points. The water intake method was carried out according to the method of environmental monitoring (Wu Zhongbiao, Wu Zucheng, Shen Xueyou et al. "Environmental Monitoring", Beijing: Chemical Industry Press, 2003: 96-97).

[0036] b. Determination of COD and BOD standard values ​​of wastewater samples

[0037] The 120 water samples collected (including 110 samples in the calibration set and 10 samples in the prediction set) were divided into 3 groups after static precipitation for 15 minutes. The first group measured its COD chemical value, the second group measured its BOD value, and the third group collected its near-infrared spectrum. The COD chemical value is determined with reference to GB...

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Abstract

The invention relates to a method capable of measuring chemical oxygen demand (COD) and biochemical oxygen demand (BOD) in waste water simultaneously. The method is characterized by comprising the following steps of: sampling and measuring, namely, sampling the waste water, measuring a COD standard value and a BOD standard value of the water sample and acquiring near infrared spectrum data of the water sample at the same time; establishing models, namely, associating the COD standard value and the BOD standard value of the water sample with the near infrared spectrum data of the water sample by using software and then establishing PLS1 regression models of the COD and the BOD values respectively by using software; and measuring a COD value and a BOD value of unknown waste water at the same time, namely, retrieving the COD value and the BOD value of the unknown waste water through the established models. The method has the advantages of simultaneous measurement on the COD value and the BOD value of the waste water, convenient operation of detecting the COD value and the BOD value of the waste water by using the models established by the method, on-line detection, high detection speed, repeatability and precision, no secondary pollution and great improvement on the detection quality and the detection efficiency of the waste water.

Description

technical field [0001] The invention relates to a method for detecting wastewater, in particular to a method for simultaneously measuring chemical oxygen demand (COD) and biochemical oxygen demand (BOD) in wastewater. Background technique [0002] Chemical oxygen demand (hereinafter referred to as COD) refers to the amount of oxidants consumed by easily oxidized organic and inorganic substances in water; 5 , BOD for short in this article is BOD 5 ) is the dissolved oxygen consumed by the biological oxidation of organic and inorganic substances in water under specified conditions. Both COD and BOD values ​​reflect the pollution degree of the water body, and they are both comprehensive indicators of the relative content of organic matter in the water body. Therefore, the determination of COD and BOD values ​​is of great significance to the total control of water pollutants and water environmental protection. [0003] At present, the COD value of wastewater is usually determ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35G06F17/50G01N21/3577G01N21/359
Inventor 杨季冬杨琼
Owner 杨季冬
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