Underground water combined remediation system

Abstract

The utility model belongs to the field of underground water treatment, and particularly relates to an underground water combined remediation system which comprises an aeration well, vacuum extraction wells arranged on the periphery of the aeration well and a nutrient solution conveying well. And the nutrient solution conveying well is arranged between the vacuum extraction well and the aeration well. According to the mode, the range of in-situ microorganism activity is effectively expanded, pollutants in underground water can be thoroughly removed, and a sustainable and efficient solution is provided for environmental governance.

Description

Technical Field

[0001] The utility model belongs to the field of groundwater treatment, and specifically relates to a groundwater joint repair system. Background Art

[0002] Groundwater pollution control is a complex and urgent task involving a variety of measures and strategies, mainly including the remediation of already contaminated groundwater, which may involve a variety of technologies such as physical treatment, chemical treatment, and biological treatment.

[0003] Physical treatment methods include but are not limited to extraction treatment and the establishment of a well group system. After extracting the contaminated groundwater and treating it, it is reinjected or enters the project's external wastewater network according to the water quality. Chemical treatment methods add chemical agents such as neutralizers and oxidants to the contaminated water to neutralize acidic or alkaline leachate, degrade organic matter, or precipitate inorganic compounds. Biological treatment methods use the action of microorganisms to remove pollutants in groundwater through a biodegradation process. However, there is no sustainable and efficient solution for effective protection of groundwater and thorough pollution control. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects in the prior art and provide a groundwater joint repair system.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A groundwater joint remediation system, characterized in that it comprises an aeration well, a vacuum extraction well arranged around the aeration well, and a nutrient solution delivery well; the nutrient solution delivery well is arranged between the vacuum extraction well and the aeration well.

[0007] The aeration well is arranged at the center of the groundwater pollution area; the vacuum extraction well and the nutrient solution delivery well are each independently 4 in number.

[0008] The aeration well comprises an aeration well body and an aeration head arranged in the aeration well body; the outer wall of the aeration well body is provided with aeration pipe holes from the groundwater level to the bottom of the aeration well body; the aeration head is connected to an air compressor; and a well cover is arranged on the aeration well body.

[0009] The vacuum extraction well comprises an extraction well body and a vacuum pump connected to the extraction well; the bottom of the extraction well body is higher than the groundwater level; extraction well flower holes are arranged on the outer wall of the extraction well body from below the ground.

[0010] The nutrient solution delivery well comprises a delivery well body and a nutrient solution preparation box connected to the delivery well body through a delivery pipe; the bottom of the delivery well body is higher than the groundwater level; and a delivery well flower hole is arranged on the outer wall of the delivery well body from below the ground.

[0011] The infusion tube is provided with a flow timer.

[0012] The diameter of the aeration well body is 0.2-0.3m; the bottom of the aeration well is deeper than the contaminated soil.

[0013] The diameter of the conveying well body is 0.1-0.2m.

[0014] The diameter of the extraction well body is 0.1-0.2m.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model provides a groundwater joint remediation system. By aerating the organic pollutants in the groundwater through an aeration well, the dissolved oxygen content in the underground aquifer can be increased, and the volatile and semi-volatile organic pollutants in the soil and groundwater can be blown out at the same time. Through the soil vacuum extraction well, under relatively permeable conditions, the volatile organic pollutants and the organic pollutants that can be degraded by aerobic microorganisms in the saturated zone are brought into the aeration zone with air or water, and can be decomposed again by aerobic microorganisms in the soil layer, thereby achieving the purpose of strengthening the removal of pollutant components. By adding the nutrients required by the microorganisms to the nutrient solution delivery well, as the groundwater flows into the aquifer from the flower holes of the delivery well body, the components in the nutrient solution are also diffused to the surrounding affected area. This process not only promotes the growth of microorganisms, but also enhances their ability to degrade pollutants. This method effectively expands the scope of in-situ microbial activities, allowing pollutants in the groundwater body to be more thoroughly removed, providing a sustainable and efficient solution for environmental governance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the groundwater joint repair system of the utility model;

[0018] Figure 2 This is a distribution diagram of the utility model groundwater joint repair system. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and the best embodiment.

[0020] Figure 1-2A groundwater combined remediation system is shown, characterized in that it includes an aeration well 13, a vacuum extraction well 3 arranged around the aeration well, and a nutrient solution delivery well 11; the nutrient solution delivery well 11 is arranged between the vacuum extraction well 3 and the aeration well 13.

[0021] The aeration well 13 is arranged at the center of the groundwater pollution area; the vacuum extraction well 3 and the nutrient solution delivery well 11 are each independently four.

[0022] The aeration well 13 includes an aeration well body and an aeration head 14 arranged in the aeration well body; the outer wall of the aeration well body is provided with aeration pipe holes from the groundwater level to the bottom of the aeration well body; the aeration head 14 is connected to the air compressor 9; and a well cover 12 is arranged on the aeration well body.

[0023] The vacuum extraction well 3 includes an extraction well body and a vacuum pump 1 connected to the extraction well through an exhaust pipe 2; the bottom of the extraction well body is higher than the groundwater level; an extraction well flower hole 4 is provided on the outer wall of the extraction well body from below the ground; and an extraction well cover 5 is provided on the extraction well body.

[0024] The nutrient solution delivery well 11 includes a delivery well body and a nutrient solution preparation box 8 connected to the delivery well body through a delivery pipe 6; the bottom of the delivery well body is higher than the groundwater level; a delivery well flower hole is provided on the upper outer wall of the delivery well body from below the ground; and a delivery well cover 10 is provided on the delivery well body. A flow timer 7 is provided on the delivery pipe. The flow timer 7 regularly delivers nutrient solution to the delivery well body, strengthens the microorganisms in the soil, and promotes the decomposition of pollutants by the microorganisms. The carbon source, nitrogen source, and phosphorus source are the main components of the nutrient solution, and other components can be inorganic salts and water, wherein the ratio of the carbon source, nitrogen source, and phosphorus source is 100:5:1.

[0025] As one implementation form, the diameter of the aeration well body is 0.2-0.3m; the bottom of the aeration well is deeper than the contaminated soil. The diameter of the transport well body is 0.1-0.2m. The diameter of the extraction well body is 0.1-0.2m.

[0026] The groundwater joint remediation system of the present application includes the following sequence and steps:

[0027] a. Determine the location and depth of the aeration well 13 according to the hydrogeological conditions of the groundwater contaminated area, and drill the well using a drilling rig, with the final hole below the lower boundary of the contaminated groundwater contamination halo;

[0028] b. Determine the length of the aeration well 13, vacuum extraction well 3 and nutrient solution delivery well 11 according to the well depth, and set the length of the aeration well flower hole, extraction well flower hole and delivery well flower hole according to the pollution conditions;

[0029] c. Place the aeration head 14 at the bottom of the aeration well, and connect the aeration pipe to the air compressor 9 on the ground through the opening on the well cover 12 to pump air into the aeration well 13;

[0030] d. Connect the air delivery pipe 2 to the vacuum pump 1 to continuously extract air from the air-encapsulating zone;

[0031] e. Connect the infusion tube 6 to the flow timer 7 on the ground, and then connect it to the nutrient solution preparation box 8, and quantitatively deliver the nutrient solution to the microbial nutrient solution delivery well through the nutrient solution preparation box and the flow timer;

[0032] f. The nutrient solution preparation tank 8 is used to prepare and store nutrient solution for enhancing bioremediation.

[0033] g. The nutrient solution preparation box 8 needs to be regularly maintained and serviced.

[0034] In summary, the utility model provides a groundwater joint remediation system, which can increase the dissolved oxygen content in the underground aquifer by aerating the organic pollutants in the groundwater through the aeration well, and at the same time blow out the volatile and semi-volatile organic pollutants in the soil and groundwater. Through the soil vacuum extraction well, under relatively permeable conditions, the volatile organic pollutants and the organic pollutants that can be degraded by aerobic organisms in the saturated zone enter the aeration zone with air or water, and can be decomposed again by aerobic microorganisms in the soil layer, thereby achieving the purpose of strengthening the removal of pollutant components. By adding nutrients required by microorganisms to the nutrient solution delivery well, as the groundwater flows into the aquifer from the flower holes of the delivery well body, the components in the nutrient solution also diffuse to the surrounding affected area. This process not only promotes the growth of microorganisms, but also enhances their ability to degrade pollutants. This method effectively expands the scope of in-situ microbial activities, allowing pollutants in groundwater to be more thoroughly removed, providing a sustainable and efficient solution for environmental governance.

[0035] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A groundwater joint remediation system, characterized in that: It comprises an aeration well, a vacuum extraction well arranged around the aeration well, and a nutrient solution delivery well; the nutrient solution delivery well is arranged between the vacuum extraction well and the aeration well.

2. The groundwater joint repair system according to claim 1, characterized in that: The aeration well is arranged at the center of the groundwater pollution area; the vacuum extraction well and the nutrient solution delivery well are each independently 4 in number.

3. The groundwater joint repair system according to claim 1, characterized in that: The aeration well comprises an aeration well body and an aeration head arranged in the aeration well body; the outer wall of the aeration well body is provided with aeration pipe holes from the groundwater level to the bottom of the aeration well body; the aeration head is connected to an air compressor; and a well cover is arranged on the aeration well body.

4. The groundwater joint repair system according to claim 1, characterized in that: The vacuum extraction well comprises an extraction well body and a vacuum pump connected to the extraction well; the bottom of the extraction well body is higher than the groundwater level; extraction well flower holes are arranged on the outer wall of the extraction well body from below the ground.

5. The groundwater joint repair system according to claim 1, characterized in that: The nutrient solution delivery well comprises a delivery well body and a nutrient solution preparation box connected to the delivery well body through a delivery pipe; the bottom of the delivery well body is higher than the groundwater level; and a delivery well flower hole is arranged on the outer wall of the delivery well body from below the ground.

6. The groundwater joint repair system according to claim 5, characterized in that: The infusion tube is provided with a flow timer.

7. The groundwater joint repair system according to claim 3, characterized in that: The diameter of the aeration well body is 0.2-0.3m; the bottom of the aeration well is deeper than the contaminated soil.

8. The groundwater joint repair system according to claim 5, characterized in that: The diameter of the conveying well body is 0.1-0.2m.

9. The groundwater joint repair system according to claim 4, characterized in that: The diameter of the extraction well body is 0.1-0.2m.

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