Microbial release plate device for organic contaminated plots and application method

Abstract

The present invention relates to the technical field of treatment of organic contaminated plots, in particular to a microbial release plate device for organic contaminated plots and an application method. It includes a release plate housing, several slots are formed in the release plate housing, and a liquid permeable area is provided on the side of the release plate housing facing downstream; a temperature control plate is provided in the slot of the release plate housing facing upstream, a microbial attachment plate is provided in the slot of the release plate housing facing the liquid permeable area, and an injection well plate is provided in the slot between the temperature control plate and the microbial attachment plate. It can keep the surrounding environment of the release plate device constant, keep the microorganisms for treating the contaminated plot active for a long time, and can be recycled.

Description

Technical Field

[0001] The present invention relates to the technical field of organic contaminated site treatment, in particular to a microbial release plate device for organic contaminated sites and an application method thereof. Background Art

[0002] With the implementation of the "carbon neutrality" policy, the concept of green and low-carbon remediation of contaminated sites has received increasing attention. Conventional remediation models are gradually moving towards a green and low-carbon path.

[0003] According to research, domestic organic contaminated sites generally include: petrochemical contaminated sites such as petroleum hydrocarbons / benzene / olefins, pesticide contaminated sites such as chlorobenzene / chlorophenol, and coal chemical contaminated sites with polycyclic aromatic hydrocarbons. The green and low-carbon remediation models mainly include in-situ advanced oxidation models such as hydrogen peroxide / ozone, phytoremediation models, and microbial remediation models. At present, domestic related enterprises have screened various microbial strains suitable for the remediation of organic contaminated sites and have strong application prospects.

[0004] The microbial remediation of contaminated sites has a long cycle and spans several winters. How to ensure that the microorganisms applied to the contaminated sites maintain their activity for a long time is a major problem that needs to be solved urgently. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned defects existing in the prior art, and propose a microbial release plate device for organic contaminated sites and an application method thereof, which can keep the surrounding environment of the release plate device constant, enable the microorganisms for treating contaminated sites to maintain their activity for a long time, and can be recycled.

[0006] The technical solution of the present invention is: a microbial release plate device for organic contaminated sites, which includes a release plate housing, several slots are formed in the release plate housing, and a liquid permeable area is provided at the side of the release plate housing facing downstream;

[0007] There are three slots in the release plate housing, and at least one slot is inserted with a microbial attachment plate.

[0008] In the present invention, according to actual needs, a temperature control plate and / or an injection well plate can also be inserted into the slots of the release plate housing.

[0009] The release plate housing includes:

[0010] An outer shell wall, a cavity is provided inside the outer shell wall, and the bottom end of the outer shell wall is connected to an inverted triangular tip body;

[0011] Raised clamping strips, several raised clamping strips are respectively fixed on the two inner side walls of the outer shell wall symmetrically arranged, and the raised clamping strips on the two inner side walls are symmetrically arranged. The raised clamping strips symmetrically arranged divide the cavity in the outer shell into several slots;

[0012] Shell fixing holes: Several shell fixing holes are provided in the upper part of the outer shell wall. A bolt body is provided in each shell fixing hole. The bolt body penetrates through the release plate shell and the microbial attachment plate. The liquid permeation area is located at the outer shell wall below the shell fixing holes.

[0013] A power supply wire is provided at the top of the temperature control plate;

[0014] Temperature control plate fixing holes are provided in the upper part of the temperature control plate. The temperature control plate fixing holes and the shell fixing holes are arranged in correspondence with each other, and the bolt body penetrates through the temperature control plate fixing holes;

[0015] An insulating heating area is provided in the temperature control plate below the temperature control plate fixing holes. A serpentine resistance wire tube is provided in the insulating heating area.

[0016] Water injection well plate fixing holes are provided in the upper part of the water injection well plate. The water injection well plate fixing holes and the shell fixing holes are arranged in correspondence with each other, and the bolt body penetrates through the water injection well plate fixing holes;

[0017] A water injection well group area is provided in the water injection well plate below the water injection well plate fixing holes. Several water injection well pipes are provided in the water injection well group area at intervals in the vertical direction;

[0018] A water injection pipe is provided at the top of the water injection well plate. The water injection pipe is communicated with the water injection well pipes.

[0019] Microbial attachment plate fixing holes are provided in the upper part of the microbial attachment plate. The microbial attachment plate fixing holes and the shell fixing holes are arranged in correspondence with each other;

[0020] A microbial attachment area is provided in the microbial attachment plate below the microbial attachment plate fixing holes. The microbial attachment area is a rough blended net.

[0021] The present invention also discloses an application method of the above microbial release plate device for organic contaminated plots, which includes the following steps:

[0022] S1. Select a microbial remediation area of an organic contaminated plot for line laying. A first upper water level liquid storage tank is built at the uppermost upstream of the remediation area, and a second lower water level liquid storage tank is built in the exact middle of the remediation area;

[0023] S2. Build a first bio-release plate group in the remediation area between the first upper water level liquid storage tank and the second lower water level liquid storage tank. The first microbial release plate group includes several microbial release plate devices;

[0024] S3. Build a second microbial release plate group downstream of the second lower water level liquid storage tank. The second microbial release plate group includes several microbial release plate devices;

[0025] S4. Build a microbial release plate device downstream of the second microbial release plate group, and build an underground temperature signal well in the second microbial release plate group;

[0026] S5. Construct a group of pumping wells at the far downstream of the remediation area;

[0027] S6. Insert the microbial attachment plate into the slot of the release plate housing, start pumping water in the pumping wells, and supplement the pumped water into the first upper water level liquid storage tank and the second lower water level liquid storage tank to form a water body circulation in the remediation area;

[0028] S7. Inject groundwater or warm water into the injection well plate. During the process of the groundwater or warm water flowing downstream, it flows through the microbial attachment plate, and the microbial strains on the microbial attachment plate enter the soil along with the flowing groundwater or warm water to achieve the treatment of the organic contaminated plot.

[0029] In step S2, the first microbial release plate group includes three microbial release plate devices, and the three microbial release plate devices form an isosceles triangle microbial release plate structure, and the three microbial release plate devices are respectively located at the three vertices of the isosceles triangle microbial release plate structure.

[0030] In step S3, the second microbial release plate group includes three microbial release plate devices, and the three microbial release plate devices form an isosceles triangle microbial release plate structure;

[0031] One of the microbial release plate devices is located at the vertex of the isosceles triangle microbial release plate structure, and the other two microbial release plate devices are located at the waists of the isosceles triangle microbial release plate structure;

[0032] In step S4, underground temperature signal wells are constructed at the middle horizontal positions of the microbial release plate devices at both sides of the isosceles triangle microbial release plate structure.

[0033] In step S5, the pumping well group includes several pumping wells, and the pumping wells form an isosceles triangle pumping well group, and the three pumping wells are respectively located at the three vertices of the isosceles triangle pumping well group.

[0034] The beneficial effects of the present invention are as follows:

[0035] (1) Through the cooperation of the first upper water level liquid storage tank, the second lower water level liquid storage tank and the pumping wells, the microbial release plate device of the present application can artificially control the underground water flow field and increase the underground water flow velocity, so that the microorganisms released by the device can gradually cover the remediation area;

[0036] (2) The microbial release plate device of the present invention has several identical slots, and the temperature control plate, the injection well plate and the microbial attachment plate can be inserted as required, and there are many operation scenarios;

[0037] (3) The microbial attachment plate adopted by the microbial release plate device of the present invention can be replaced at any time, the dosage of microbial agents in the remediation area can be adjusted, and the slow release of microbial agents can be realized.

[0038] (4) The microbial release plate device described in this application has strong environmental temperature adaptability. An underground temperature signal well is set to monitor the underground temperature in real time. The microbial release plate device can insert a temperature control plate to adjust the underground environmental temperature, so that the microorganisms released into the underground environment can have high biological activity at an appropriate temperature. Description of the Drawings

[0039] Figure 1 Top view sectional structure schematic diagram of the device described in the present invention;

[0040] Figure 2 Schematic diagram of the structure of the plug body;

[0041] Figure 3 Top view sectional structure schematic diagram of the release plate housing;

[0042] Figure 4 Side view sectional structure schematic diagram of the release plate housing;

[0043] Figure 5 Front view sectional structure schematic diagram of the release plate housing;

[0044] Figure 6 Front view structure schematic diagram of the temperature control plate;

[0045] Figure 7 Front view structure schematic diagram of the injection well plate;

[0046] Figure 8 Front view structure schematic diagram of the microbial attachment plate;

[0047] Figure 9 Front view structure schematic diagram of the liquid storage tank;

[0048] Figure 10 Top view structure schematic diagram of the liquid storage tank;

[0049] Figure 11 Top view plane schematic diagram of the microbial release plate device described in the present invention applied to the repair area;

[0050] Figure 12 Underground sectional structure schematic diagram of the microbial release plate device described in the present invention applied to the repair area.

[0051] In the figure: 1 - release plate housing; 101 - outer housing wall; 102 - raised clamping strip; 103 - slot; 104 - inverted triangular tip; 105 - liquid permeable area; 106 - housing fixing hole; 2 - temperature control plate; 201 - power supply wire; 202 - temperature control plate fixing hole; 203 - insulated heating area; 3 - injection well plate; 301 - injection pipe; 302 - injection well plate fixing hole; 303 - injection well group area; 304 - injection well pipe; 4 - microbial attachment plate; 401 - microbial attachment plate fixing hole; 402 - microbial attachment area; 5 - bolt body; 6 - liquid storage tank; 601 - rectangular cast iron tank; 602 - drain pipe; 7 - underground temperature signal well; 8 - pumping well; 9 - first upper water level liquid storage tank; 10 - second lower water level liquid storage tank. Detailed implementation mode

[0052] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation mode of the present invention will be given in conjunction with the accompanying drawings.

[0053] In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementation modes disclosed below.

[0054] Embodiment 1

[0055] As Figures 1 to 8 shown, the microbial release plate device for organic contaminated plots of the present invention includes a release plate housing 1, and a temperature control plate 2, an injection well plate 3 and a microbial attachment plate 4 provided in the release plate housing 1. The temperature control plate 2, the injection well plate 3 and the microbial attachment plate 4 are all fixed in the release plate housing 1. In this embodiment, the upper parts of the temperature control plate 2, the injection well plate 3 and the microbial attachment plate 4 are fixedly connected to the release plate housing 1 through a bolt body 5.

[0056] As Figure 3 and Figure 4 shown, the upper part of the release plate housing 1 is in the shape of a rectangular parallelepiped box, there is a cavity inside the release plate housing 1, and the temperature control plate 2, the injection well plate 3 and the microbial attachment plate 4 are arranged at intervals in the cavity of the release plate housing 1. The lower part of the release plate housing 1 is provided with an inverted triangular tip body 104, and the longitudinal section of the inverted triangular tip body is in the shape of an inverted triangle. The purpose of setting the inverted triangular tip body 104 is to facilitate the insertion of the device into the underground soil layer.

[0057] The upper part of the release plate housing 1 is provided with an outer housing wall 101. The outer housing wall 101 is arranged along the perimeter of the release plate housing 1, and the sides of adjacent outer housing walls 101 are fixedly connected to form a cuboid-shaped release plate housing 1, and a cavity is formed inside the release plate housing 1. At the two inner side walls opposite to each other in the cavity, several protruding clamping strips 102 are symmetrically arranged. The two symmetrically arranged protruding clamping strips 102 form a group of protruding clamping strips, and the several groups of protruding clamping strips in the cavity divide the cavity into several slots 103 at intervals. The temperature control plate 2, the water injection well plate 3, and the microbial attachment plate 4 can be arranged in these slots 103.

[0058] In this embodiment, there are four groups of protruding clamping strips in the cavity of the release plate housing 1. Each group of protruding clamping strips includes two protruding clamping strips 102 that are symmetrically arranged and fixed on the inner wall in the width direction of the outer housing wall 101. These four groups of protruding clamping strips divide the cavity in the housing into three slots 103 arranged along the length direction of the release plate housing. The temperature control plate 2, the water injection well plate 3, and the microbial attachment plate 4 are sequentially arranged in the placement cavity. Housing fixing holes 106 are provided on the outer housing walls symmetrically arranged on both sides of the release plate housing 1, and two fixing holes 106 are provided on each side of the outer housing wall. Corresponding fixing holes are provided above the temperature control plate 2, the water injection well plate 3, and the microbial attachment plate 4. The bolt body 5 passes through the above-mentioned fixing holes in sequence, thereby realizing the connection between the release plate housing 1, the temperature control plate 2, the water injection well plate 3, and the microbial attachment plate 4.

[0059] As Figure 2 shown, the bolt body 5 includes a connecting rod. The two ends of the connecting rod are in the shape of external threads, and the two ends of the connecting rod are in threaded connection with nuts respectively. The connecting rod passes through the fixing holes on the release plate housing 1, the temperature control plate 2, the water injection well plate 3, and the microbial attachment plate 4 in sequence, and then the nuts at both ends are tightened to realize the connection between the temperature control plate 2, the water injection well plate 3, and the microbial attachment plate 4 and the release plate housing 1.

[0060] A liquid permeable area 105 is provided on the outer housing wall 101 of the release plate housing 1. Most of the area on the outer housing wall 101 is the liquid permeable area 105. The liquid permeable area 105 is located below the housing fixing hole 106 and above the inverted triangular tip body 104. A number of liquid permeable holes are provided in the liquid permeable area 105. Groundwater flows into the release plate housing 1 or flows out of the release plate housing 1 through the liquid permeable area composed of the liquid permeable holes. The porosity of the liquid permeable area 105 is 80%.

[0061] In this embodiment, the release plate housing 1 is made of carbon steel. The length of the release housing 1 is 6m, the thickness is 80cm, and the height is 5m. The thickness of the outer wall 101 of the release plate housing 1 is 12cm. The length of the convex bar 102 is 25cm, the thickness is 8cm, and the height is 4.5m. The length of the slot 103 is 25cm, the width is 8cm, and the height is 4.5m. The vertical height of the inverted triangular tip 104 is 0.5m. The length of the liquid permeable area 105 is 5.5m and the width is 3.8m. The vertical distance from the top of the liquid permeable area 105 to the center of the housing fixing hole 106 is 11cm. The aperture of the housing fixing hole 106 is 11cm, and the vertical distance from the center of the housing fixing hole 106 to the top of the release plate housing is 30cm.

[0062] The release plate housing 1 is formed by laser cutting a whole plate. The inverted triangular tip 104 can be cut and replaced in case of severe deformation or damage during use.

[0063] As Figure 6 shown, two temperature control plate fixing holes 202 are provided on the upper part of the temperature control plate 2, and the temperature control plate fixing holes 202 are correspondingly arranged with the housing fixing holes 106. A heating groove is provided on the temperature control plate below the temperature control plate fixing hole 202. The insulating heating area 203 is arranged in the heating groove. A heating resistance wire tube arranged in a serpentine shape is provided in the insulating heating area, which heats the surrounding environment during operation, so that the microbial attachment plate 4 is always in a constant temperature state, ensuring the active state of the microorganisms on the microbial attachment plate 4.

[0064] In this embodiment, the overall appearance length of the temperature control plate 2 is 5.7m, the thickness is 6cm, and the height is 4.5m. The power supply wire 201 is located at the top of the temperature control plate and 0.5m away from the left side. The power supply wire uses a 25-square copper core wire. The aperture of the temperature control plate fixing hole 202 is 11cm, and the distance from the hole center to the top of the temperature control plate 2 is 30cm. The length of the insulating heating area 203 is 5m and the width is 3.5m. The vertical distance between the top of this area and the center of the temperature control plate fixing hole 202 is 15cm. The overall power of this temperature control plate 2 is 18Kw.

[0065] As Figure 7As shown in the figure, fixing holes 302 are provided at the upper part of the water injection well plate 3, and the fixing holes 302 of the water injection well plate correspond to the fixing holes 106 of the housing. Inside the water injection well plate 3 below the fixing holes 302 of the water injection well plate, there is a water injection well group area 303, and the water injection well group area 303 includes several water injection well pipes 304 arranged at intervals within the water injection well plate. The pipe wall of the water injection well pipe 304 is porous. The top end of the water injection well plate 3 is connected to the water injection pipe 301. The water injection pipe 301 is in a communicating state with several water injection well pipes 304. Groundwater or warm water enters each water injection well pipe 304 through the water injection pipe 301, flows out through the holes on the water injection well pipe 304, and flows towards the microbial attachment plate below, accelerating the diffusion of microorganisms along with the underground water flow in the downstream direction.

[0066] In this embodiment, the length of the water injection well plate 3 is 5.7 m, the thickness is 6 cm, and the height is 4.5 m. At the middle position of the top surface of the water injection well plate 3, there is a water injection pipe 301 with a diameter of 4 cm. The aperture of the fixing hole 302 of the water injection well plate is 11 cm, and the distance between the center of the hole and the top end of the water injection well plate is 30 cm. The length of the water injection well group area 303 is 5 m and the width is 3.5 m, and the vertical distance from the top end of this area to the center of the fixing hole 302 of the water injection well plate is 15 cm. In this embodiment, a total of thirteen water injection well pipes 304 with a diameter of 4 cm are arranged equidistantly and side by side inside the water injection well group area 303.

[0067] As Figure 8 shown in the figure, fixing holes 401 are provided at the upper part of the microbial attachment plate 4, and the fixing holes 401 of the microbial attachment plate correspond to the fixing holes 106 of the housing. Inside the microbial attachment plate 4 below the fixing plate 401 of the microbial attachment plate, there is a microbial attachment area 402, and the microbial attachment area 402 is a rough blended fabric mesh, which can effectively attach 8 - 10 kg of microbial strains.

[0068] In this embodiment, the length of the microbial attachment plate 4 is 5.7 m, the thickness is 6 cm, and the height is 4.5 m. The aperture of the fixing hole 401 of the microbial attachment plate is 11 cm, and the distance between the center of the hole and the top end of the microbial attachment plate is 30 cm. The length of the microbial attachment area 402 is 5 m and the width is 3.5 m, and the vertical distance from the top end of this area to the center of the fixing hole of the microbial attachment plate is 15 cm.

[0069] In this embodiment, the aperture sizes and hole positions of the housing fixing holes 106, the temperature control plate fixing holes 202, the water injection well plate fixing holes 302, and the microbial attachment plate fixing holes 401 are all the same, so that after the bolt body 5 penetrates and inserts into these fixing holes, the overall connection of the device can be realized.

[0070] In this embodiment, there is no liquid permeable area on the outer shell wall on one side of the release plate housing 1 arranged along the length direction, which is in the shape of a solid plate. On the outer shell wall on the other side arranged along the length direction, there is a liquid permeable area. The temperature control plate 2 is arranged in the slot on the side facing the solid outer shell wall, the microorganism attachment plate 4 is arranged in the slot on the side facing the liquid permeable area, and the injection well plate 3 is arranged in the slot between the temperature control plate 2 and the microorganism attachment plate 4.

[0071] The device described in this application is mainly applicable to organic polluted plots, and the pollution depth of the organic polluted plots is not greater than 7m. For construction areas with short construction period requirements, it is necessary to insert a temperature control plate, an injection well plate and a microorganism attachment plate into the three slots of the release plate housing respectively.

[0072] Embodiment 2

[0073] This application also discloses an application method of the microorganism release plate device for organic polluted plots described in Embodiment 1. This device needs to cooperate with a liquid storage tank 6, an underground temperature signal well 7 and a pumping well 8 during actual application.

[0074] As Figure 9 and Figure 10 shown, there is a liquid storage tank 6 upstream of the microorganism release plate device. The liquid storage tank 6 includes a top-opening rectangular cast iron tank 601, and several down pipes 602 are connected to the bottom of the rectangular cast iron tank 601. The rectangular cast iron tank 601 stores groundwater, and the groundwater in the tank is injected into the soil through the down pipes 602.

[0075] In this embodiment, the length of the rectangular cast iron tank is 8m, the width is 2.5m, and the height is 1m. Three down pipes 602 are evenly distributed at the bottom of the rectangular cast iron tank. The down pipes are round pipes, the diameter of the pipe orifice is 80cm, and the pipe length is 1m.

[0076] There is a pumping well 8 downstream of the microorganism release plate device. In this embodiment, the pumping well uses a cast iron pipe well, the well diameter of the pumping well is 0.5m, and the screen is opened 1m below the ground surface.

[0077] During the application of the microorganism release plate device described in this application, multiple release devices need to be used in cooperation. There is an underground temperature signal well 7 between several microorganism release devices. A temperature control detection module is installed inside the underground temperature signal well 7, and the temperature control detection module can be connected to a mobile phone app. During use, the temperature value of the groundwater detected by the temperature control detection module is used to control the temperature of the temperature control plate 2, and the ambient temperature around the microorganism release plate device is adjusted so that the microorganism strains can be kept at a constant temperature as much as possible.

[0078] This application method includes the following specific steps.

[0079] The first step is to select the microbial remediation area of the organically contaminated land for layout.

[0080] In this embodiment, the planned microbial remediation area for organically contaminated land is a rectangular area with a length of 35 m and a width of 20 m.

[0081] The second step is to build the first upper water level storage tank 9 at the upstream of the repair area. The first upper water level storage tank 9 is located at the horizontal center line of the repair area. The rectangular cast iron box of the first upper water level storage tank 9 is placed on the horizontal ground, and the bottom outlet of the sewer pipe of the first upper water level storage tank 9 is located at the -1m line of the ground.

[0082] A second lower water level storage tank 10 is built in the middle of the repair area. The bottom line of the rectangular cast iron box of the second lower water level storage tank 10 is located at -1m from the ground, and the lowest end outlet of the sewer pipe 62 of the second lower water level storage tank 10 is located at the -2m line from the ground.

[0083] In the third step, a first microorganism release plate group consisting of several microorganism release plate devices is set in the repair area between the first upper water level liquid storage tank 9 and the second lower water level liquid storage tank 10.

[0084] In this embodiment, the first microorganism release plate group includes three microorganism release plate devices, and the three microorganism release plate devices form an isosceles right triangle microorganism release plate structure. The three microorganism release plate devices are respectively located at the three vertices of the isosceles right triangle microorganism release plate structure.

[0085] In the first microorganism release plate group of this embodiment, the center-to-center distance between the microorganism release plate devices located at the two vertices of the hypotenuse of the isosceles right triangle is 10 meters. The vertical distance between the center point of the microorganism release plate device located at the right-angled vertex of the isosceles right triangle and the hypotenuse of the isosceles right triangle is 5 meters.

[0086] In the fourth step, a second microorganism release plate group consisting of a plurality of microorganism release plate devices is arranged downstream of the second lower water level liquid storage tank 10 .

[0087] In this embodiment, the second microorganism release plate group includes three microorganism release plate devices, and the three microorganism release plate devices form an isosceles triangle microorganism release plate structure. The fourth microorganism release plate device is located at the vertex of the isosceles triangle microorganism release plate structure, and the fifth and sixth microorganism release plate devices are respectively located at the waist of the isosceles triangle microorganism release plate structure.

[0088] In this embodiment, the horizontal distance between the center points of the second lower water level liquid storage tank 10 and the fourth microbial release plate device is 3.5 m. The fifth microbial release plate device and the sixth microbial release plate device are respectively extended along the directions forming an angle of 135° with the two end points of the fourth microbial release plate device. The center point distance between the fourth microbial release plate device and the fifth microbial release plate device, and the center point distance between the fourth microbial release plate device and the sixth microbial release plate device are both 6.5 m.

[0089] Step 5: Construct a seventh microbial release plate device downstream of the second biological release plate group.

[0090] In this embodiment, the center point distance between the fourth microbial release plate device and the seventh microbial release plate device is 7.5 m.

[0091] Step 6: Construct an underground temperature signal well 7 at the middle horizontal position between the fifth microbial release plate device and the sixth microbial release plate device.

[0092] In this embodiment, the underground temperature signal well 7 is a copper round pipe well with a well diameter of 80 cm, and three temperature control detection modules are installed inside. The construction depth of the underground temperature signal well 7 is 7 m, and temperature control detection modules are arranged every 2 m along the depth direction. This module system can be connected to a mobile phone app.

[0093] Step 7: Construct an isosceles triangle pumping well group composed of three pumping wells at the far downstream of the repair area. The three pumping wells are respectively located at the vertices of the isosceles triangle pumping well group, namely the first pumping well, the second pumping well, and the third pumping well.

[0094] In this embodiment, the first pumping well is located at the far downstream near the repair area. The vertical distance between the center of the first pumping well and the far downstream side line of the repair area is 2.5 m. The distance between the centers of the first pumping well and the second pumping well, and the distance between the centers of the first pumping well and the third pumping well are 3.5 m.

[0095] The construction depth of the pumping well is 8 m. During application, two pumping wells with a relatively large distance are selected for pumping operation, and the remaining one pumping well is used for underground water level observation. In this embodiment, the second pumping well and the third pumping well are used for pumping operation, and the first pumping well is used for underground water level observation. During actual use, in the repair area, the number of pumping wells can be supplemented and constructed according to the pumping effect and the underground water level observation effect.

[0096] Step 8: Insert the temperature control plate 2, the injection well plate 3, and the microbial attachment plate 4 into the slots of the release plate housing according to requirements.

[0097] In the ninth step, during application, first, the first upper water level liquid storage tank 9 is filled with water to the designed liquid level and maintained. Secondly, the second lower water level liquid storage tank 10 is filled with water and its liquid level is controlled. Meanwhile, pumping is started according to the liquid level condition of the pumping well 8 at the most downstream of the repair area. The water discharged from the pumping well is supplemented into the first upper water level liquid storage tank 9 and the second lower water level liquid storage tank 10 to form a water body circulation within the area.

[0098] In the tenth step, the injection pipe 301 intermittently injects the pumped groundwater or warm water according to the actual situation. During the downward flow of the groundwater or warm water, it will pass through the microbial attachment plate 4, and the microbial strains attached to the microbial attachment plate 4 will flow downward with the flowing groundwater or warm water into the soil. At the same time, in cooperation with the downward pumping well, an artificial groundwater flow field is formed within the treatment area, and the microorganisms gradually spread towards the direction of the groundwater flow field, covering the entire treatment area and reacting with the organic pollution in the soil, thereby achieving the treatment of the organic pollution plot.

[0099] In the eleventh step, according to the temperature information fed back by the underground temperature signal well 7, the temperature control board 2 is started to adjust the temperature environment around the microbial release plate device, so that the temperature environment around the microbial release plate device remains stable, thereby ensuring the activity of the microbial strains on the microbial attachment plate.

[0100] In a certain petrochemical pollution repair site in Gansu, the pollution depth of the soil and groundwater is 6 m; the pollutants are benzene and vinyl chloride. It is required to use the microbial repair technology for repair demonstration, and the total demonstration area is 1000 m 2 .

[0101] When the repair demonstration enters the site, areas with relatively serious pollution levels are selected for demonstration. A total of 2 demonstration areas are planned for the application of the microbial release plate device described in the present invention. The area of each demonstration repair area is 600 m 2 (length 30 m, width 20 m). Each demonstration area is constructed according to the application method described in Example 2. Among them, the construction depth of the microbial release plate device is 5 m, the construction depth of the underground temperature signal well is 6 m, and the construction depth of the pumping well is 7 m.

[0102] The application cycle of the device described in the present application is 2.5 years. The device is stable and good during the operation period. After the demonstration repair, the concentration of benzene in the groundwater drops from the highest 18 mg / L to 0.1 mg / L, and the concentration of vinyl chloride drops from the highest 11 mg / L to 0.3 mg / L. The microbial repair effect is obvious and has achieved the expected effect.

[0103] Example 3

[0104] When the device described in the present application is used in sandy soil miscellaneous fill layers or areas with better groundwater flow, all three slots of the release plate housing can be inserted with microbial attachment plates, which is beneficial to the release of microbial strains.

[0105] When the temperature of the area where the device is installed is lower than 10°C, it is necessary to insert a temperature control board into one or two slots of the release plate housing, and heat the surrounding environment through the temperature control board to maintain the activity of the microbial strains.

[0106] Others are the same as in Embodiment 1.

[0107] Embodiment 4

[0108] When the device described in the present application is used in a clay layer or an area with poor groundwater flow, a water injection well board and a microbial attachment board need to be inserted into the slots of the release plate housing. Through the water injection well board, the groundwater flow is improved, so that the microbial strains can flow and spread with the groundwater.

[0109] When the temperature of the area where the device is installed is lower than 10°C, it is necessary to insert a temperature control board into the slot of the release plate housing, and heat the surrounding environment through the temperature control board to maintain the activity of the microbial strains.

[0110] Others are the same as in Embodiment 1.

[0111] The above has introduced in detail the microbial release plate device and application method for organic contaminated plots provided by the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention. The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown in this article, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A microbial release plate device for organic contaminated plots, characterized in that, It includes a release plate housing, several slots are formed in the release plate housing, and a liquid permeable area is provided on the downstream-facing side of the release plate housing; There are three slots in the release plate housing, and at least one slot is inserted with a microbial attachment plate; The release plate housing includes: An outer shell wall, a cavity is provided inside the outer shell wall, and the bottom end of the outer shell wall is connected to an inverted triangular tip body; Raised clamping strips, several raised clamping strips are respectively fixedly provided on the two symmetrically arranged inner side walls of the outer shell wall, and the raised clamping strips on the two inner side walls are symmetrically arranged. The symmetrically arranged raised clamping strips divide the cavity inside the outer shell into several slots; Housing fixing holes, several housing fixing holes are provided in the upper part of the outer shell wall, bolts are provided in the housing fixing holes, the bolts penetrate through the release plate housing and the microbial attachment plate, and the liquid permeable area is located at the outer shell wall below the housing fixing holes; Build a pumping well group at the most downstream of the repair area.

2. The microbial release plate device for organic contaminated plots according to claim 1, wherein A temperature control plate and / or an injection well plate can also be inserted into the slot of the release plate housing.

3. The microbial release plate device for organic contaminated plots according to claim 1, wherein A power supply wire is provided at the top of the temperature control plate; Temperature control plate fixing holes are provided in the upper part of the temperature control plate, and the temperature control plate fixing holes are correspondingly arranged with the housing fixing holes, and the bolts penetrate through the temperature control plate fixing holes; An insulating heating area is provided in the temperature control plate below the temperature control plate fixing hole, and a serpentine resistance wire tube is provided in the insulating heating area.

4. The microbial release plate device for organic contaminated plots according to claim 1, characterized in that, Injection well plate fixing holes are provided in the upper part of the injection well plate, and the injection well plate fixing holes are correspondingly arranged with the housing fixing holes, and the bolts penetrate through the injection well plate fixing holes; An injection well group area is provided in the injection well plate below the injection well plate fixing hole, and several injection well pipes are provided in the injection well group area at intervals in the vertical direction; An injection water pipe is provided at the top of the injection well plate, and the injection water pipe is communicated with the injection well pipes.

5. The microbial release plate device for organic contaminated plots according to claim 1, characterized in that, Microbial attachment plate fixing holes are provided in the upper part of the microbial attachment plate, and the microbial attachment plate fixing holes are correspondingly arranged with the housing fixing holes; A microbial attachment area is provided in the microbial attachment plate below the microbial attachment plate fixing hole, and the microbial attachment area is a rough blended net.

6. A method for applying the microbial release plate device for organic polluted plots according to any one of claims 1-5, characterized in that, It includes the following steps: S1. Select an organic pollution plot for microbial remediation area for line laying. Build a first upper water level storage tank at the most upstream of the remediation area, and build a second lower water level storage tank in the exact middle of the remediation area; S2. Build a first biological release plate group in the remediation area between the first upper water level storage tank and the second lower water level storage tank. The first microbial release plate group includes several microbial release plate devices; S3. Build a second microbial release plate group downstream of the second lower water level storage tank. The second microbial release plate group includes several microbial release plate devices; S4. Build a microbial release plate device downstream of the second microbial release plate group, and build an underground temperature signal well in the second microbial release plate group; S5. Build a pumping well group at the most downstream of the remediation area; S6. Insert the microbial attachment plate into the slot of the release plate housing, start pumping water in the pumping well, and supplement the pumped water into the first upper water level storage tank and the second lower water level storage tank to form a water body circulation in the remediation area; S7. Inject groundwater or warm water into the injection well plate. During the process of the groundwater or warm water flowing downstream, it flows through the microbial attachment plate, and the microbial strains on the microbial attachment plate enter the soil along with the flowing groundwater or warm water, realizing the treatment of the organic pollution site.

7. The application method according to claim 6, characterized in that, In step S2, the first microbial release plate group includes three microbial release plate devices, and the three microbial release plate devices form an isosceles triangle microbial release plate structure, and the three microbial release plate devices are respectively located at the three vertices of the isosceles triangle microbial release plate structure.

8. The application method according to claim 7, wherein, In step S3, the second microbial release plate group includes three microbial release plate devices, and the three microbial release plate devices form an isosceles triangle microbial release plate structure; One of the microbial release plate devices is located at the vertex of the isosceles triangle microbial release plate structure, and the other two microbial release plate devices are located at the waists of the isosceles triangle microbial release plate structure; In step S4, an underground temperature signal well is constructed at the middle horizontal position of the microbial release plate devices at both sides of the isosceles triangle microbial release plate structure.

9. The application method according to claim 6, wherein, In step S5, the pumping well group includes several pumping wells, and the pumping wells form an isosceles triangle pumping well group, and the three pumping wells are respectively located at the three vertices of the isosceles triangle pumping well group.

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