Method for quickly judging whether rainwater enters sewage inspection well

Abstract

The invention relates to a method for identifying whether rainwater is introduced into sewage, which can quickly judge whether the rainwater is introduced into a sewage inspection well in a mixed or staggered manner. The method comprises the steps of 1 collecting and pretreating a water sample; 2 carrying out three-dimensional fluorescence spectrum detection on the water sample to obtain a three-dimensional fluorescence spectrogram of the water sample; and 3 analyzing the three-dimensional fluorescence spectrogram of the water sample to judge whether rainwater enters the sewage inspection well or not. The method is simple and rapid to operate, reliable and economical, and can be widely used for judging whether the rainwater is introduced into the sewage inspection well in a mixed or staggered manner.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for quickly judging that rainwater is connected to a sewage inspection well. Background technique [0002] At present, my country's old residential areas and municipal roads are undergoing rain and sewage diversion reconstruction of drainage pipe networks. Occurs, leading to incomplete diversion of rain and sewage. The rainwater pipes are mixed or wrongly connected to the sewage system. On the one hand, it is easy to cause the sewage pipes to run overloaded during the rainfall, and sewage overflows; on the other hand, as the rainfall continues, the water quality in the sewage pipes drops significantly, resulting in sewage. The influent COD concentration and ammonia nitrogen concentration of the treatment plant have been greatly reduced, seriously affecting the normal operation of the sewage treatment plant. [0003] It is easy to judge whether the sewag...

AI Technical Summary

Problems solved by technology

[0002] At present, my country's old residential areas and municipal roads are undergoing rain and sewage diversion reconstruction of drainage pipe networks. Occurs, leading to incomplete diversion of rain and sewage

The rainwater pipes are mixed or wrongly connected to the sewage system. On the one hand, it is easy to cause the sewage pipes to run overloaded during the rainfall, and sewage overflows; on the other hand, as the rainfall continues, the water quality in the sewage pipes drops significantly, resulting in sewage. The concentration of COD and ammonia nitrogen in the influent of the treatment plant has been greatly reduced, seriously affecting the normal operation of the sewage treatment plant

[0003] It is easy to judge whether the sewage is connected to the rainwater inspection well by observing the water volume in the rainwater inspection well in dry weather, but the water volume of the rainwater connected to the sewage inspection well is often affected by factors such as rainfall intensity and connection pipe diameter, resulting in many indirect access to sewage The rainwater in the inspection well (that is, the rainwater pipe is not directly connected to the sewage inspection well) cannot be judged through the observation of water volume. In addition, the change of domestic water consumption of residents will also affect the judgment of whether the rainwater is connected to the sewage inspection well, so only through sewage inspection It is unreliable to judge whether there is rainwater access based on the water volume in the well

Although the rainwater access point can be accurately diagnosed through the on-site survey and survey of the pipe network (such as using QV detection, CCTV detection and other technical means), the sewage pipe network needs to be dredged to a certain extent before the diagnosis, and the robot car detection is required. In the case of pipelines, when there are small-diameter (diameter less than 400mm) sewage pipes or obstacles that are difficult to remove, since the robot car cannot walk and detect in the pipeline, some data will be lost. This method is time-consuming Labor force, high economic cost, and detection operation has certain limitations

However, using some conventional water quality indicators (such as COD, ammonia nitrogen, electrical conductivity, etc.) to analyze water quality, although it can be judged to a certain extent that rainwater is connected to sewage inspection wells, these index values ​​are easily affected by residents' water use conditions and living habits. It is difficult to determine a universal water quality index value range to judge whether there is rainwater connected to the sewage inspection well

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