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Method for rapidly detecting concentration of suspended substances in inlet-outlet water of municipal sewage treatment plant

A technology for urban sewage and suspended solids, which is used in measuring devices, material analysis by optical means, instruments, etc., can solve the problems of difficulty in fully meeting the needs of suspended solids concentration detection, large errors in low concentration detection, and long time consumption. The effect of short time, reduced experimental error and low detection limit

Inactive Publication Date: 2014-03-19
TIANJIN NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the gravimetric method is a conventional method for detecting the concentration of suspended solids. However, due to the repeated drying of the filter membrane before and after the sample is filtered during the detection process, it takes a long time, has low efficiency, has large detection errors at low concentrations, and is easily affected by the operation of the inspector. large error
[0005] At present, although American Hach and German WTW companies can produce instruments that can be used to detect the concentration of suspended solids in sewage, the cost is high, and the unit price of the equipment is about 10,000 yuan or higher.
And its analysis process depends on the standard curve preset inside the instrument, which is difficult to fully meet the detection needs of suspended solids concentration in different sewage treatment plants

Method used

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  • Method for rapidly detecting concentration of suspended substances in inlet-outlet water of municipal sewage treatment plant
  • Method for rapidly detecting concentration of suspended substances in inlet-outlet water of municipal sewage treatment plant
  • Method for rapidly detecting concentration of suspended substances in inlet-outlet water of municipal sewage treatment plant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0031] (1) Draw a standard curve, take the remaining sludge of the urban sewage treatment plant to be tested for the concentration of suspended matter, dry it at 103°C to constant weight, and prepare a suspended matter standard solution with a suspended matter concentration of 750, 500, 250, 100, 15, 5 mg / L; At 810nm, using distilled water as a control, measure the absorbance value, take the absorbance as the ordinate, and the concentration as the abscissa, draw the standard curve of suspended matter;

[0032] (2) Collect water samples from the influent and effluent of urban sewage treatment plants; after the water samples are collected, remove floating impurities, mix them thoroughly with a mixer for 5 minutes, and then let them stand for 3 minutes; 2002) in accordance with the provisions;

[0033] (3) Take the treated water sample to be tested, detect it at a wavelength of 810nm, use distilled water as a control, compare it with the standard curve of suspended matter, and fi...

Embodiment 3

[0035] (1) Draw a standard curve, take the remaining sludge of the urban sewage treatment plant to be tested for the concentration of suspended solids, dry it to constant weight at 105°C, and prepare a suspended solids standard solution with a suspended solids concentration of 750, 500, 250, 100, 15, 5mg / L; At 810nm, using distilled water as a control, measure the absorbance value, take the absorbance as the ordinate, and the concentration as the abscissa, draw the standard curve of suspended matter;

[0036] (2) Collect water samples of the influent and effluent of urban sewage treatment plants; after the water samples are collected, remove floating impurities, mix them thoroughly with a mixer for 5 minutes, and let them stand for 5 minutes; the collection method is based on the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918- 2002) in accordance with the provisions;

[0037] (3) Take the treated water sample to be tested, detect it at a wavelength ...

Embodiment 5

[0058] Comparative Test

[0059] 1. Routine determination of the concentration of suspended solids in the influent and effluent of a large urban sewage treatment plant

[0060] Method, steps:

[0061] (1) Use tweezers to pick up the 0.45μm filter membrane and put it into a weighing bottle with constant weight beforehand, put it in an oven and dry it at 103~105℃ to constant weight (weight difference ≤0.2mg);

[0062] (2) Put the filter membrane with constant weight on the filter, cover the matching funnel and clamp it with clips, moisten the filter membrane with distilled water and continue to suck and filter;

[0063] (3) According to the provisions of the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002) of the People's Republic of China, collect water samples of the influent and effluent of urban sewage treatment plants;

[0064] (4) Take 100ml water sample and filter it with suction. Let all the water pass through the filter membrane. Then...

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Abstract

The invention discloses a method for rapidly detecting suspended substances in inlet-outlet water of a municipal sewage treatment plant. The method comprises the following steps: drawing a standard curve; collecting inlet-outlet water samples of the municipal sewage treatment plant; removing floating impurities from the water samples, fully mixing the water samples for 2 minutes to be uniform, and standing for 1 minute; then detecting the treated water samples under the condition of wavelength of 810nm. Since the standard curve of the suspended substances is drawn by utilizing the actual excess sludge of the municipal sewage treatment plant, the actual detection requirements of different departments can be met. As the excess sludge of the municipal sewage treatment plant running well is relatively stable in property and reflects the physical property of the suspended substances in the inlet-outlet water to a certain extent, compared with the traditional gravimetric approach, the method has the advantages that the working efficiency is enhanced, the experimental error is reduced, and experiment operators can stably operate the method after being simply trained.

Description

[0001] The invention was funded by the National Science and Technology Support Program Project (2012BAC07B02), the New Century Excellent Talents Support Program of the Ministry of Education (NCET-10-0954), the Tianjin Normal University Youth Fund (52XQ1105) and the Tianjin Normal University Youth Fund (52XQ1104) fund. technical field [0002] The invention belongs to the technical field of urban sewage treatment and relates to a method for rapidly detecting the concentration of suspended matter in and out of urban sewage treatment plants. Background technique [0003] In recent years, with the gradual increase of national environmental protection efforts, the discharge standards of sewage treatment plants are also gradually improved. The State Environmental Protection Administration issued the "Notice on Strictly Implementing the Pollutant Discharge Standards of Urban Sewage Treatment Plants" in 2005, requiring that "the northern water-scarce areas should implement reclaimed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3577
Inventor 尚云涛向俊王中良曹德明杨曦
Owner TIANJIN NORMAL UNIVERSITY
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