Judgment method for the cause of water quality change in the water source switching area of the water supply network
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A technology of changing water quality and switching areas, applied in the direction of testing water, material inspection products, etc., to achieve the effect of improving efficiency, solving water quality problems, and having little impact
Active Publication Date: 2021-07-02
北京市自来水集团有限责任公司技术研究院
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[0007] The purpose of the present invention is to address the technical defects in the existing methods for judging the causes of water quality changes in the water supply pipe network. The present invention provides a method for judging the causes of water quality changes in the water source switching area of the water supply pipe network. The method of the present invention measures the switching of water sources in situ The water quality parameters of the water samples in the peak water consumption period of the regional water quality change pipe section and the night stagnation period can be used to determine the cause of the water quality change according to the ratio of the water quality parameters. It is not necessary to cut off and dig out the water quality change pipe section, and analyze the pipe scale inside the water supply pipe network. The method is simple and easy Fast and practical, it can quickly solve the problem of "yellow water" and ensure water safety
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Embodiment 1
[0036] Taking a groundwater supply area as an example, after adjusting the valve switch settings, switching to another water plant that uses surface water as the water source, the turbidity (NTU) and total iron (mg / L) increase and tend to exceed the standard as an example .
[0037] 1. Determination of water quality during peak water consumption
[0038] 1-1. At 18:00 during the peak water consumption period (usually 17:00-19:00 during the peak water consumption period for residents), water samples A1 and B1 are respectively taken from the front pipe A and user B of the water quality change pipe section;
[0039] 1-2. According to the determination methods of corresponding water quality parameters in "Water and Wastewater Monitoring and Analysis Methods (4th Edition)", measure the water quality parameters of water samples A1 and B1, and the measurement results are shown in Table 1:
[0040] Table 1 Water quality parameters of water quality change pipe section peak water consu...
Embodiment 2
[0065] Taking a self-provided well water supply community as an example, after adjusting the valve switch settings, switching to another water plant with surface water as the water source, the turbidity (NTU) and total iron (mg / L) increased and tended to exceed the standard as an example.
[0066] 1. Determination of water quality during peak water consumption
[0067] 1-1. At 18:00 during the peak water consumption period (usually 17:00-19:00 during the peak water consumption period for residents), water samples C1 and D1 are respectively taken from the pipe C in front of the building and the user D of the water quality change pipe section;
[0068] 1-2. According to the determination methods of corresponding water quality parameters in "Water and Wastewater Monitoring and Analysis Methods (4th Edition)", measure the water quality parameters of water samples C1 and D1, and the measurement results are shown in Table 3:
[0069] Table 3 Water quality parameters of water qualit...
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Abstract
The invention provides a method for judging the cause of water quality change in a water source switching area of a water supply pipe network, including measuring the ratio of water quality parameters and the change ratio of dissolved iron during the peak water use period of the water quality change pipe section, the stagnation period at night, and the change ratio of dissolved iron. 比值 , soluble iron 变化比值 0.7‑1.3, turbidity 比值 , total iron 比值 ≤0.5, the water quality change is that the sediment in the pipeline is brought into the water due to the change of the hydraulic condition, and the pipeline is flushed with a large amount of water; if residual chlorine 比值 ≤0.5, turbidity 比值 , total iron 比值 ≥1, soluble iron 变化比值 <0.7, the water quality change is the release of iron as the main substance in the pipeline, gradually increase the proportion of new water sources, and improve the adaptability of the pipeline. This method quickly and accurately judges and analyzes the causes of water quality changes when the water quality of the water supply pipe network changes, and provides solutions to ensure the normal water supply and water safety of the water supply pipe network in the area where the water source is switched. Stability has important guiding significance, it is convenient and easy to implement, simple and fast.
Description
technical field [0001] The invention belongs to the field of pipe network safety transmission and distribution in drinking water treatment, and relates to a method for judging the cause of water quality change in a water supply pipe network, in particular to a method for judging the cause of water quality change in a water source switching area of a water supply pipe network, so as to ensure the water supply pipe network Water quality stability and water safety. Background technique [0002] With the development of society and economy, people's demand for water resources, especially drinking water resources, is increasing day by day. Long-distance cross-basin water transfer is one of the important ways to solve the shortage of urban water resources. However, when switching between different water sources, there is a risk of deterioration of the water quality of the water supply network. The reason may be that the sediment in the pipeline is brought into the water due to t...
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Application Information
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