A Constructed Wetland Clogged Area Detection Method Enhancing Resistivity Difference
A technology of artificial wetlands and detection methods, which is applied in the fields of electric/magnetic exploration, geophysical measurement, radio wave measurement system, etc., can solve the problems of no effective technical basis for congestion control and maintenance, and inability to accurately monitor and locate the congestion area, etc. To achieve the effect of efficient operation
Active Publication Date: 2019-11-26
GUILIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
[0004] The purpose of the present invention is to solve the problem that the existing artificial wetland cannot accurately monitor and locate the blockage area, resulting in no effective technical basis for blockage control and maintenance, to provide a detection method that is easy to implement, blockage monitoring and accurate positioning, and can realize the blockage of the constructed wetland The precise monitoring and positioning of the area provides technical support for the continuous and efficient operation of the constructed wetland
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Embodiment
[0021] This embodiment is a small subsurface flow constructed wetland, and the wetland filler is quartz sand.
[0022] The flow chart of a constructed wetland clogging detection method that strengthens the resistivity difference applied to the detection of the constructed wetland clogged area is as follows figure 1 As shown, on the basis of collecting and analyzing the existing conditions of the constructed wetland, the improved single-hole high-density logging method was used to detect the clogged area of the constructed wetland without adding and adding NaCl solution, and according to the experimental results, the Blockage judgment and location. Specific implementation steps (based on figure 1 flow chart) is as follows:
[0023] (1) Constructed wetland data collection: The constructed wetland is a three-layer layered filler artificial wetland, each layer is 30cm thick, and the upper, middle and lower layers of filler are fine-grained quartz sand, medium-grained quartz sa...
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The invention discloses a method for detecting clogged areas of constructed wetlands with enhanced resistivity differences. The difference in resistivity between the blocked area and the unblocked area was enhanced by adding NaCl solution. After adding the NaCl solution, the NaCl solution cannot flow into the blocked area for a short time, so the resistivity of the blocked area will be higher than that of the unblocked area. Therefore, there is a large difference in the resistivity distribution measured without adding NaCl solution and adding NaCl solution, and the resistivity distribution of the constructed wetland saturated with NaCl solution has a large change compared with the constructed wetland without adding NaCl solution due to the existence of the clogged area. The high-resistance area that appears on the resistivity distribution map is the clogged area, which realizes the monitoring and positioning of the clogged area of the constructed wetland. The invention has the characteristics of simplicity, economy and convenient implementation, and provides strong technical support for the continuous and efficient operation of the artificial wetland.
Description
technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method for detecting clogged areas of constructed wetlands by enhancing resistivity differences. Background technique [0002] Constructed wetland sewage treatment technology is a new ecological engineering technology for sewage treatment that emerged in the 1970s. It has the advantages of good flexibility, low investment, low energy consumption, strong decontamination ability, convenient management, and no secondary pollution. Applications are increasingly common. However, in recent years, problems such as clogging frequently occur in constructed wetlands during operation, the purification performance decreases, and the service life is shortened. For example, among the 355 subsurface flow constructed wetlands in the United States and the United Kingdom, nearly half of them were clogged within five years of use, and the hydraulic conductivity of the filler...
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IPC IPC(8): G01V3/00
CPCG01V3/00
Inventor 丁彦礼韦益华李为一唐甫白少元吕玉增熊彬
Owner GUILIN UNIVERSITY OF TECHNOLOGY