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Dual-wavelength ultraviolet method organic wastewater chemical oxygen demand (COD) detection device and method

A technology of organic wastewater and detection devices, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of high maintenance cost, secondary pollution of waste liquid, continuous monitoring difficulties, etc., to eliminate interference, improve measurement accuracy, and shorten detection reagents the effect of time

Inactive Publication Date: 2013-06-12
CHINA JILIANG UNIV
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Problems solved by technology

[0003] The COD measurement methods for water environment monitoring are mainly potassium dichromate oxidation method and permanganate index method. The measurement results of the two are relatively reliable and have good reproducibility, but there are problems such as high reagent consumption, long measurement period, and difficulty in continuous monitoring. Disadvantages such as secondary pollution caused by waste liquid and high maintenance cost

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  • Dual-wavelength ultraviolet method organic wastewater chemical oxygen demand (COD) detection device and method
  • Dual-wavelength ultraviolet method organic wastewater chemical oxygen demand (COD) detection device and method
  • Dual-wavelength ultraviolet method organic wastewater chemical oxygen demand (COD) detection device and method

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Embodiment Construction

[0031] like figure 1 As shown, a dual-wavelength ultraviolet method organic wastewater COD detection device of the present invention includes a full-wavelength ultraviolet light source, a first monochromator, a visible light source, a second monochromator, a measuring tank, an ultraviolet detector, a visible light detector, and a subtraction method. device, amplifying circuit, A / D conversion circuit, PLC control system, and display device; the measuring tank is respectively connected with the first monochromator, the second monochromator, the ultraviolet detector and the visible light detector, and the first monochromator is connected with the ultraviolet The light source is connected, the second monochromator is connected with the visible light source, the subtractor, the amplifier circuit, the A / D conversion circuit, the PLC control system and the display device are connected in sequence.

[0032] As shown in Figure 2(a) and Figure 2(b), the measurement tank includes an ultr...

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Abstract

The invention discloses a dual-wavelength ultraviolet method organic wastewater chemical oxygen demand (COD) detection device and a method. In existing actual application, the problem of interference of suspended matter fluctuation in a water sample on absorbance generally exists in a forecast model, so that accuracy of the model is directly affected. A measuring groove is connected with a first monochromator, a second monochromator, an ultraviolet detector and a visible light detector, the first monochromator is connected with an ultraviolet light source, and the second monochromator is sequentially connected with a visible light source, a subtracter, an amplifying circuit, an alternating / direct (A / D) switching circuit, a programmable logic controller (PLC) control system and a display device. The dual-wavelength ultraviolet method organic wastewater COD detection device can accurately forecast COD value in the water sample, is full-automatic in measuring process, greatly shortens measuring period, improves COD measuring speed, improves suitable range and measuring precision, and can be suitable for on-line, rapid, and accurate analysis and measuring of wastewater COD.

Description

technical field [0001] The invention relates to the field of wastewater COD measurement, in particular to a dual-wavelength ultraviolet method organic wastewater COD detection device and method. Background technique [0002] Chemical oxygen demand (COD) reflects the degree of water body pollution by reducing organic matter, and is one of the important items that must be detected in water quality pollution monitoring and treatment, and is also an important indicator of water quality evaluation. Traditional COD detection refers to the treatment of wastewater with strong oxidants under certain conditions, the amount of strong oxidants consumed by reducing substances in water, and the results are converted into oxygen content. The smaller its value, the less polluted the water quality. [0003] The COD measurement methods for water environment monitoring are mainly potassium dichromate oxidation method and permanganate index method. The measurement results of the two are relati...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N21/33
Inventor 夏凤毅盛成龙李金页
Owner CHINA JILIANG UNIV
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