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Method for detecting initial rain water quality of drainage system through inversion of turbidity

A technology of drainage system and initial rainwater, applied in testing water, material inspection products, etc., can solve problems such as bottlenecks in real-time, accurate, and rapid monitoring, inability to meet water quality sampling and analysis cycles, and long data analysis cycles, saving water quality analysis. Low cost, low maintenance cost, small effect of human interference

Inactive Publication Date: 2011-11-23
上海城投污水处理有限公司水处理设计研究分公司
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Problems solved by technology

However, due to the long data analysis period of the existing automated online water quality monitoring system, taking the national energy conservation and emission reduction assessment indicators COD and ammonia nitrogen as examples, the shortest data analysis period of the COD online analyzer of the American HACH brand is 1 hour, Germany The minimum analysis interval of WTW's large-scale online nitrogen and phosphorus analyzer TresCon is also about 10 minutes, which cannot meet the minute-level water quality sampling and analysis period required for the study of the initial rainwater quality change law
[0007] It can be seen that, limited by factors such as current technology, equipment, and personnel, there are still bottlenecks in the real-time, accurate, and rapid monitoring of the initial rainwater quality change process and its characteristics

Method used

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  • Method for detecting initial rain water quality of drainage system through inversion of turbidity
  • Method for detecting initial rain water quality of drainage system through inversion of turbidity
  • Method for detecting initial rain water quality of drainage system through inversion of turbidity

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Embodiment 0

[0051] Such as figure 1 , figure 2 As shown, a detection method using turbidity to invert the initial rainwater quality of the drainage system includes the following steps:

[0052] Step 101, before the automatic turbidimeter 1 rains, set the sampling frequency, and measure the NTU information of the initial rainwater turbidity of the drainage system in real time during the rainfall process;

[0053] Step 102, sending the initial rainwater turbidity NTU information of the drainage system to the control computer 2;

[0054] Step 103, the control computer 2 calculates the change curve of the water quality index of the initial rainwater in the drainage system according to the linear or exponential empirical formula, and displays the information of the water quality change curve on the monitor of the control computer.

[0055]The study found that there is a certain correlation between various pollutants in the initial rainwater of the drainage system, especially there is a good...

Embodiment 1

[0058] The implementation time was July 11, 2010, and the location was in the drainage system of Jiangsu Road in Shanghai. This implementation was carried out in full accordance with the method described above.

[0059] (1) Collected 12 initial rainwater samples of the Jiangsu Road drainage system in the early stage, and measured 6 water quality indicators such as turbidity NTU, total COD, particulate COD, total organic carbon TOC, total phosphorus TP, and suspended particulate matter SS in the laboratory;

[0060] (2) In this example, the exponential empirical formula is better than the linear empirical formula, so five water quality items including water sample turbidity NTU and total COD, particulate COD, total organic carbon TOC, total phosphorus TP, and suspended particulate matter SS were selected and established. Index type empirical formula and coefficient of determination of the indicator, see Figure 6-10 , the relevant formulas and determination coefficients of each...

Embodiment 2

[0070] After Embodiment 1, on August 17, 2010, the second embodiment was carried out in the drainage system of Jiangsu Road in Shanghai, and this embodiment was completely operated according to the method described above.

[0071] Since the automatic turbidimeter of exponent empirical formula and installation has been established in embodiment 1, only carried out following operation in embodiment 2:

[0072] (1) A sampling frequency of 5 minutes was set before the rainfall, and a total of 15 NTUs of the initial rainwater turbidity of the drainage system were measured in real time, continuously, and at high frequency during the 75-minute rainfall;

[0073] (2) Utilize the exponent experience formula established in embodiment 1 step (3) to invert five water quality indicators such as total COD, particulate COD, total organic carbon TOC, total phosphorus TP, and suspended particulate matter SS of the initial rainwater of Jiangsu Road drainage system, The change curve of water qua...

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Abstract

The invention relates to a method for detecting initial rain water quality of a drainage system through inversion of turbidity, comprising the steps of: 1) before raining, setting a sampling frequency of an automatic turbidity meter for measuring initial rain water turbidity NTU (Nephelometric Turbidity Unit) information of the drainage system in real time in the process of rainfall; 2) sending the initial rain water turbidity NTU information of the drainage system to a control computer; and 3) figuring out a water quality index variation curve of the initial rain water of the drainage system according to a linear or index experiential formula by the control computer, and displaying water quality index variation curve information on a display of the control computer. Compared with the prior art, the method for detecting the initial rain water quality of the drainage system through inversion of turbidity has the advantages of real-time, rapid and accurate on-line monitoring in the quality variation process of the initial rain water and the like.

Description

technical field [0001] The invention relates to a water quality detection method, in particular to a detection method for inverting the initial rainwater quality of a drainage system by using turbidity. Background technique [0002] The drainage system is a combination of drainage collection, transportation, water quality treatment and discharge facilities in a certain way. The phenomenon that the concentration of pollutants in the initial period of rainfall runoff is higher than that in the later period is called the initial flushing effect. [0003] Affected by major factors such as history, natural geography, and human activities, the drainage system along the Suzhou Creek in downtown Shanghai is mostly a combined system, and the design return period of heavy rain is lower than that of other cities at home and abroad. Rainwater runoff, especially the initial rainwater overflow pollution is still lack of effective control and treatment. The initial rainwater carries a lar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/18
Inventor 程晓波陈华潘炜丁敏程江袁述时张立
Owner 上海城投污水处理有限公司水处理设计研究分公司
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