Microorganism release plate device for organic polluted land parcels and application method

Abstract

The invention relates to the technical field of treatment of organic polluted land parcels, in particular to a microorganism release plate device for organic polluted land parcels and an application method. Comprising a release plate shell, a plurality of inserting grooves are formed in the release plate shell, and a liquid permeating area is arranged on the side face, facing the downstream, of the release plate shell; a temperature control plate is arranged in the slot facing the upstream in the release plate shell, a microorganism attachment plate is arranged in the slot facing the liquid permeable area in the release plate shell, and an injection well plate is arranged in the slot between the temperature control plate and the microorganism attachment plate. The surrounding environment of the release plate device can be kept constant, and microorganisms for treating polluted plots can keep active for a long time and can be recycled.

Description

Technical Field

[0001] The invention relates to the technical field of organic polluted land treatment, in particular to a microorganism release plate device for organic polluted land and an application method thereof. Background Art

[0002] With the implementation of the "carbon neutrality" policy, the concept of green and low-carbon restoration of polluted land has received more and more attention. Conventional restoration models are gradually moving towards a green and low-carbon path.

[0003] According to the survey, domestic organic polluted plots generally include: petroleum hydrocarbons / benzene / olefins and other petrochemical polluted plots, chlorobenzene / chlorophenol pesticide polluted plots, polycyclic aromatic hydrocarbons coal chemical polluted plots. Green and low-carbon remediation modes mainly include advanced oxidation modes such as in-situ hydrogen peroxide / ozone, plant remediation modes, and microbial remediation modes. At present, domestic related companies have screened out various types of microbial strains suitable for the remediation of organic polluted plots, and they have strong application prospects.

[0004] The microbial remediation and treatment cycle for contaminated land is relatively long and will span several winters. How to ensure that the microorganisms applied to the contaminated land remain active 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 of the prior art and propose a microbial release plate device and application method for organically contaminated land, which can keep the surrounding environment of the release plate device constant, so that the microorganisms used to treat the contaminated land can remain active for a long time and can be recycled.

[0006] The technical solution of the present invention is: a microorganism release plate device for organically contaminated land, which includes a release plate shell, a plurality of slots are formed in the release plate shell, and a liquid permeable area is provided on the side of the release plate shell facing downstream;

[0007] Three slots are arranged in the release plate housing, and the microorganism attachment plate is inserted into at least one of the slots.

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

[0009] The release plate housing comprises:

[0010] An outer shell wall, a cavity is arranged in the outer shell wall, and the bottom end of the outer shell wall is connected to the inverted triangle tip body;

[0011] Raised card strips, a plurality of raised card strips are fixedly provided on the two symmetrically arranged inner side walls of the outer shell wall, and the raised card strips on the two inner side walls are symmetrically arranged, and the symmetrically arranged raised card strips divide the cavity in the outer shell into a plurality of slots;

[0012] Shell fixing holes: several shell fixing holes are arranged on the upper part of the shell wall, plugs are arranged in the shell fixing holes, the plugs penetrate the release plate shell and the biological attachment plate, and the liquid permeable area is located at the shell wall below the shell fixing holes.

[0013] A power supply line is provided at the top of the temperature control board;

[0014] A temperature control plate fixing hole is provided on the upper part of the temperature control plate, the temperature control plate fixing hole is arranged correspondingly to the housing fixing hole, and the bolt body passes through the temperature control plate fixing hole;

[0015] An insulating heating zone is arranged in the temperature control board below the fixing hole of the temperature control board, and a serpentine resistance wire array tube is arranged in the insulating heating zone.

[0016] The upper part of the water injection well plate is provided with a water injection well plate fixing hole, the water injection well plate fixing hole and the shell fixing hole are arranged correspondingly, and the bolt body passes through the water injection well plate fixing hole;

[0017] A water injection well group area is provided in the water injection well plate below the fixing hole of the water injection well plate, and a plurality of water injection well pipes are provided in the water injection well group area at intervals along the vertical direction;

[0018] A water injection pipe is arranged on the top of the water injection well plate, and the water injection pipe is communicated with the water injection well pipe.

[0019] A microorganism attachment plate fixing hole is provided on the upper part of the microorganism attachment plate, and the microorganism attachment plate fixing hole is arranged correspondingly to the shell fixing hole;

[0020] A microorganism attachment area is arranged in the microorganism attachment plate below the fixing hole of the microorganism attachment plate, and the microorganism attachment area is a rough blended mesh.

[0021] The present invention also discloses an application method of the microorganism release plate device for organically contaminated land, which comprises the following steps:

[0022] S1. Select the microbial remediation area of ​​the organic polluted land for layout, build the first upper water level storage tank at the upstream of the remediation area, and build the second lower water level storage tank in the middle of the remediation area;

[0023] S2, constructing a first microbial release plate group in the repair area between the first upper water level storage tank and the second lower water level storage tank, wherein the first microbial release plate group includes a plurality of microbial release plate devices;

[0024] S3, constructing a second microorganism release plate group downstream of the second lower water level storage tank, wherein the second microorganism release plate group includes a plurality of microorganism release plate devices;

[0025] S4, constructing a microorganism release plate device downstream of the second microorganism release plate group, and constructing an underground temperature signal well in the second microorganism release plate group;

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

[0027] S6, inserting the microorganism attachment plate into the slot of the release plate housing, starting water pumping in the pumping well, and replenishing the pumped water into the first upper water level storage tank and the second lower water level storage tank, forming a water body circulation in the repair area;

[0028] S7. Inject groundwater or warm water into the water injection well plate. The groundwater or warm water flows through the microbial attachment plate during its flow downstream. The microbial species on the microbial attachment plate enter the soil along with the flowing groundwater or warm water, thereby achieving the treatment of organically polluted land.

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

[0030] In step S3, 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;

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

[0032] In step S4, underground temperature signal wells are constructed at the middle horizontal position of the microorganism release plate devices at the waists of both sides of the isosceles triangle microorganism 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 three pumping wells are respectively located at the vertices of the isosceles triangle pumping well group.

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

[0035] (1) The microorganism release plate device described in the present application can artificially control the groundwater flow field and increase the groundwater flow rate through the cooperation of the first upper water level storage tank, the second lower water level storage tank and the pumping well, so that the microorganisms released by the device can gradually cover the repair area;

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

[0037] (3) The microorganism attachment plate used in the microorganism release plate device of the present invention can be replaced at any time, the amount of microorganism agent used in the repair area can be adjusted, and the slow release of the microorganism agent can be achieved;

[0038] (4) The microbial release plate device described in the present application has strong adaptability to environmental temperature. An underground temperature signal well is set to monitor the underground temperature in real time. The microbial release plate device is inserted into a temperature control plate to adjust the underground environmental temperature, so that the microorganisms released into the underground environment can have higher biological activity at a suitable temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of a top cross-sectional structure of the device of the present invention;

[0040] Figure 2 It is a schematic diagram of the structure of the bolt body;

[0041] Figure 3 is a schematic diagram of a top-view cross-sectional structure of a release plate housing;

[0042] Figure 4 is a schematic diagram of a side cross-sectional structure of a release plate housing;

[0043] Figure 5 is a schematic diagram of a front cross-sectional structure of a release plate housing;

[0044] Figure 6 This is a schematic diagram of the front view of the temperature control board;

[0045] Figure 7 1 is a schematic diagram of the front view structure of the injection well plate;

[0046] Figure 8 It is a schematic diagram of the front view structure of the microorganism attachment plate;

[0047] Fig. 9 1 is a schematic diagram of the front view structure of the liquid storage tank;

[0048] Fig.10 1 is a schematic diagram of the structure of the liquid storage tank from a top view;

[0049] Fig.11 is a schematic top plan view of the microorganism release plate device of the present invention applied to a restoration area;

[0050] Fig.12 It is a schematic diagram of the underground cross-sectional structure of the microorganism release plate device of the present invention applied to the restoration area.

[0051] In the figure: 1-release plate shell; 101-shell wall; 102-raised card strip; 103-slot; 104-inverted triangle tip; 105-liquid permeable area; 106-shell fixing hole; 2-temperature control plate; 201-power supply line; 202-temperature control plate fixing hole; 203-insulation heating area; 3-injection well plate; 301-injection well pipe; 302-injection well plate fixing hole; 303-injection well group area; 304-injection well pipe; 4-microorganism attachment plate; 401-microorganism attachment plate fixing hole; 402-microorganism attachment area; 5-bolt body; 6-liquid storage tank; 601-rectangular cast iron box; 602-down pipe; 7-underground temperature signal well; 8-pumping well; 9-first upper liquid storage tank; 10-second upper liquid storage tank. DETAILED DESCRIPTION

[0052] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0053] In the following description, specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in a variety of other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0054] Example 1

[0055] like Figures 1 to 8 As shown, the microorganism release plate device for organically contaminated land of the present invention comprises a release plate housing 1, and a temperature control plate 2, an injection well plate 3 and a microorganism attachment plate 4 arranged in the release plate housing 1. The temperature control plate 2, the injection well plate 3 and the microorganism 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 microorganism attachment plate 4 are all fixedly connected to the release plate housing 1 through a bolt body 5.

[0056] like Figure 3 and Figure 4 As shown, the upper part of the release plate housing 1 is in a rectangular box shape, and a cavity is provided inside the release plate housing 1. The temperature control plate 2, the injection well plate 3 and the microorganism attachment plate 4 are arranged in the cavity of the release plate housing 1 at intervals. An inverted triangle tip body 104 is provided at the lower part of the release plate housing 1. The longitudinal section of the inverted triangle tip body is in an inverted triangle shape. The purpose of providing the inverted triangle 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 a shell wall 101, which is arranged along the four sides of the release plate housing 1, and the sides of adjacent shell walls 101 are fixedly connected, thereby forming a rectangular release plate housing 1, and a cavity is formed in the release plate housing 1. A plurality of raised card strips 102 are symmetrically arranged at the two inner side walls arranged opposite to each other in the cavity, and the two symmetrically arranged raised card strips 102 constitute a group of raised card strips, and the array of raised card strips in the cavity divides the cavity into a plurality of slots 103. The temperature control plate 2, the injection well plate 3 and the microorganism attachment plate 4 can be arranged in these slots 103.

[0058] In this embodiment, four groups of raised clips are provided in the cavity of the release plate housing 1, and each group of raised clips includes two raised clips 102 that are symmetrically arranged and fixed on the inner wall of the outer shell wall 101 in the width direction. The four groups of raised clips divide the cavity in the shell into three slots 103 arranged along the length direction of the release plate housing, and the temperature control plate 2, the water injection well plate 3 and the microorganism attachment plate 4 are arranged in the placement cavity in sequence. The outer shell walls symmetrically arranged on both sides of the release plate housing 1 are provided with shell fixing holes 106, and the two fixing holes 10 on each side of the outer shell wall are provided with corresponding fixing holes on the upper part of the temperature control plate 2, the water injection well plate 3 and the microorganism attachment plate 4. The bolt body 5 passes through the above 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 microorganism attachment plate 4.

[0059] like Figure 2 As shown, the bolt body 5 includes a connecting rod, both ends of which are externally threaded, and both ends of the connecting rod are threadedly connected to nuts. 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 microorganism attachment plate 4 in sequence, and then the nuts at both ends are tightened to achieve the connection between the temperature control plate 2, the water injection well plate 3 and the microorganism attachment plate 4 and the release plate housing 1.

[0060] The outer shell wall 101 of the release plate housing 1 is provided with a liquid permeable area 105, and most of the area on the outer shell wall 101 is the liquid permeable area 105, and the liquid permeable area 105 is located below the housing fixing hole 106 and above the inverted triangle pointed body 104. A plurality of liquid permeable holes are provided in the liquid permeable area 105, and 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 opening rate of the liquid permeable area 105 is 80%.

[0061] In this embodiment, the release plate housing 1 is made of carbon steel, and the release housing 1 has a length of 6m, a thickness of 80cm, and a height of 5m. The thickness of the outer shell wall 101 of the release plate housing 1 is 12cm. The length of the raised card strip 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 triangle tip body 104 is 0.5m. The length of the liquid-permeable area 105 is 5.5m, the width is 3.8m, and the vertical distance between the top of the liquid-permeable area 105 and the center of the housing fixing hole 106 is 11cm. The aperture of the housing fixing hole 106 is 11cm, and the vertical distance between the center of the housing fixing hole 106 and the top of the release plate housing is 30cm.

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

[0063] like Figure 6 As 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 arranged correspondingly to the housing fixing holes 106. A heating groove is provided on the temperature control plate below the temperature control plate fixing holes 202, and an insulating heating area 203 is arranged in the heating groove. A heating resistor wire array arranged in a serpentine type is arranged in the insulating heating area, which heats the surrounding environment when working, so that the microorganism attachment plate 4 is always in a constant temperature state, ensuring the activity state of the microorganisms on the microorganism attachment plate 4.

[0064] In this embodiment, the overall appearance length of the temperature control board 2 is 5.7m, the thickness is 6cm, and the height is 4.5m. The power supply line 201 is located at the top of the temperature control board and 0.5m away from the left side. The power supply line uses a 25 square copper core wire. The aperture of the temperature control board fixing hole 202 is 11cm, and the distance between the center of the hole and the top of the temperature control board 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 board fixing hole 202 is 15cm. The overall power of the temperature control board 2 is 18Kw.

[0065] like Figure 7As shown, the upper part of the water injection well plate 3 is provided with a water injection well plate fixing hole 302, and the water injection well plate fixing hole 302 is arranged corresponding to the shell fixing hole 106. A water injection well group area 303 is arranged in the water injection well plate 3 below the water injection well plate fixing hole 302, and the water injection well group area 303 includes several water injection well pipes 304 arranged at intervals in the water injection well plate. The pipe wall of the water injection well pipe 304 is hole-shaped. The top of the water injection well plate 3 is connected to the water injection pipe 301. The water injection pipe 301 and the several water injection well pipes 304 are all in a connected state. Groundwater or warm water enters each water injection well pipe 304 through the water injection pipe 301, flows out along the holes on the water injection well pipe 304, and flows to the microbial attachment plate below it, accelerating the diffusion of microorganisms in the downstream direction along with the groundwater flow.

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

[0067] like Figure 8 As shown, a microorganism attachment plate fixing hole 401 is provided on the upper part of the microorganism attachment plate 4, and the microorganism attachment plate fixing hole 401 is arranged corresponding to the housing fixing hole 106. A microorganism attachment area 402 is provided in the microorganism attachment plate 4 below the microorganism attachment plate fixing plate 401, and the microorganism attachment area 402 is a rough blended mesh, which can effectively attach 8-10kg of microorganism strains.

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

[0069] In this embodiment, the hole sizes and hole positions of the shell fixing hole 106, the temperature control plate fixing hole 202, the injection well plate fixing hole 302 and the microorganism attachment plate fixing hole 401 are kept consistent, so that after the bolt body 5 is inserted through these fixing holes, the overall connection of the device is achieved.

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

[0071] The device described in this application is mainly suitable for organically contaminated plots, and the contamination depth of organically contaminated plots is not more than 7m. For construction areas with short construction periods, it is necessary to insert the temperature control plate, the water injection well plate and the microbial attachment plate into the three slots of the release plate shell respectively.

[0072] Example 2

[0073] The present application also discloses an application method of the microorganism release plate device for organically contaminated land as described in Example 1. In actual application, the device needs to be implemented in conjunction with a liquid storage tank 6, an underground temperature signal well 7, and a pumping well 8.

[0074] like Fig. 9 and Fig.10 As shown, a liquid storage tank 6 is provided upstream of the microorganism release plate device. The liquid storage tank 6 comprises a top-open rectangular cast iron box 601, and a plurality of downpipes 602 are connected to the bottom of the rectangular cast iron box 601. The rectangular cast iron box 601 stores groundwater, and the groundwater in the box is injected into the soil through the downpipes 602.

[0075] In this embodiment, the rectangular cast iron box has a length of 8m, a width of 2.5m and a height of 1m. Three downpipes 602 are evenly distributed at the bottom of the rectangular cast iron box. The downpipes are circular pipes with a pipe opening diameter of 80cm and a pipe length of 1m.

[0076] A pumping well 8 is provided downstream of the microorganism release plate device. In this embodiment, the pumping well is a cast iron pipe well, the well diameter of the pumping well is 0.5m, and the screening is performed 1m below the ground.

[0077] The microbial release plate device described in the present application requires the use of multiple release devices in conjunction with each other during application. An underground temperature signal well 7 is provided between the several microbial release devices, and a temperature control detection module is installed inside the underground temperature signal well 7, which can be connected to a mobile phone app. During use, the temperature 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 microbial release plate device is adjusted so that the microbial strains can be kept in a constant temperature state as much as possible.

[0078] The application method comprises 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 35m and a width of 20m.

[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 water 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 a plurality of microorganism release plate devices is arranged in the repair area between the first upper water level liquid storage tank 6 and the second lower water level liquid storage tank 6 .

[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, and the three microorganism release plate devices are respectively located at three vertices of the isosceles right triangle microorganism release plate structure.

[0085] In the first microorganism release plate group of this embodiment, the center point distance between the microorganism release plate devices located at the two vertices of the hypotenuse of the isosceles right triangle is 10m. 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 5m.

[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 microorganism release plate device and the sixth microorganism release plate device 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 storage tank 10 and the fourth microorganism release plate device is 3.5m. The fifth microorganism release plate device and the sixth microorganism release plate device are respectively extended along the direction of the included angle of 135° between the two end points of the fourth microorganism release plate device, and the center point distance between the fourth microorganism release plate device and the fifth microorganism release plate device, and the center point distance between the fourth microorganism release plate device and the sixth microorganism release plate device are both 6.5m.

[0089] The fifth step is to construct a seventh microorganism release plate device downstream of the second microorganism release plate group.

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

[0091] The sixth step is to construct an underground temperature signal well 7 at a horizontal position between the fifth microorganism release plate device and the sixth microorganism release plate device.

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

[0093] Step 7: construct an isosceles triangle pumping well group consisting of three pumping wells at the far downstream of the restoration area. The three pumping wells are 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 most downstream of the repair area, and the vertical distance between the center of the first pumping well and the most downstream side line of the repair area is 2.5m. The distance between the center of the first pumping well and the second pumping well, and the distance between the center of the first pumping well and the third pumping well is 3.5m.

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

[0096] In the eighth step, the temperature control plate 2, the injection well plate 3 and the microorganism attachment plate 4 are inserted into the slots of the release plate housing as required.

[0097] The ninth step, when applied, firstly replenish the first upper water level storage tank 9 to the designed liquid level and maintain it, then replenish the second lower water level storage tank 10 and control the liquid level, and at the same time start pumping according to the liquid level of the pumping well 8 at the most downstream of the repair area. The water from the pumping well is replenished to the first upper water level storage tank 9 and the second lower water level storage tank 10, forming a water circulation in 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 process of the groundwater or warm water flowing downstream, it will pass through the microbial attachment plate 4. The microbial species attached to the microbial attachment plate 4 will flow downward into the soil along with the flowing groundwater or warm water. At the same time, in cooperation with the downward pumping well, an artificial groundwater flow field is formed in the treatment area. The microorganisms gradually spread in the direction of the groundwater flow field to achieve coverage of the entire treatment area and react with the organic pollution in the soil, thereby achieving the treatment of the organic polluted land.

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

[0100] A petrochemical pollution remediation site in Gansu Province, with soil and groundwater pollution depth of 6m; the pollutants are benzene and vinyl chloride, requiring the use of microbial remediation technology for remediation demonstration, with a total demonstration area of ​​1000m 2 .

[0101] When the remediation demonstration was carried out, the area with a more serious pollution degree was selected for demonstration. A total of 2 demonstration areas were planned for the application of the microbial release plate device of the present invention. The area of ​​each demonstration remediation area was 600m 2 (length 30m, width 20m), each demonstration area is constructed according to the application method described in Example 2, wherein the construction depth of the microbial release plate device is 5m, the construction depth of the underground temperature signal well is 6m, and the construction depth of the pumping well is 7m.

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

[0103] Example 3

[0104] When the device described in the present application is used in a sandy soil layer or an area with good groundwater flow, the three slots of the release plate shell can all be inserted with the 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 to heat the surrounding environment through the temperature control board to maintain the activity of the microbial strains.

[0106] The rest is the same as in Example 1.

[0107] Example 4

[0108] When the device described in the present application is used in clay layers or areas with poor groundwater flow, an injection well plate and a microbial attachment plate need to be inserted into the slot of the release plate shell. The injection well plate can improve the fluidity of groundwater and enable microbial strains to 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 to heat the surrounding environment through the temperature control board to maintain the activity of the microbial strains.

[0110] The rest is the same as in Example 1.

[0111] The above is a detailed introduction to the microbial release plate device and application method for organically contaminated land provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. The above description of the disclosed embodiments enables professionals and technicians in this field to implement or use the present invention. Various modifications to these embodiments will be obvious to professionals and technicians in this field, 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 the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A microorganism release plate device for organically contaminated land, characterized in that: It comprises a release plate housing, a plurality of 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; Three slots are arranged in the release plate housing, and the microorganism attachment plate is inserted into at least one of the slots.

2. The microorganism release plate device for organically contaminated land according to claim 1, characterized in that: The temperature control plate and / or the water injection well plate can also be inserted into the slot of the release plate housing.

3. The microorganism release plate device for organically contaminated land according to claim 1, characterized in that: The release plate housing comprises: An outer shell wall, a cavity is arranged in the outer shell wall, and the bottom end of the outer shell wall is connected to the inverted triangle tip body; Raised card strips, a plurality of raised card strips are fixedly provided on the two symmetrically arranged inner side walls of the outer shell wall, and the raised card strips on the two inner side walls are symmetrically arranged, and the symmetrically arranged raised card strips divide the cavity in the outer shell into a plurality of slots; Shell fixing holes: several shell fixing holes are arranged on the upper part of the shell wall, plugs are arranged in the shell fixing holes, the plugs penetrate the release plate shell and the biological attachment plate, and the liquid permeable area is located at the shell wall below the shell fixing holes.

4. The microorganism release plate device for organically contaminated land according to claim 3, characterized in that: A power supply line is provided at the top of the temperature control board; A temperature control plate fixing hole is provided on the upper part of the temperature control plate, the temperature control plate fixing hole is arranged correspondingly to the housing fixing hole, and the bolt body passes through the temperature control plate fixing hole; An insulating heating zone is arranged in the temperature control board below the fixing hole of the temperature control board, and a serpentine resistance wire array tube is arranged in the insulating heating zone.

5. The microorganism release plate device for organically contaminated land according to claim 3, characterized in that: The upper part of the water injection well plate is provided with a water injection well plate fixing hole, the water injection well plate fixing hole and the shell fixing hole are arranged correspondingly, and the bolt body passes through the water injection well plate fixing hole; A water injection well group area is provided in the water injection well plate below the fixing hole of the water injection well plate, and a plurality of water injection well pipes are provided in the water injection well group area at intervals along the vertical direction; A water injection pipe is arranged on the top of the water injection well plate, and the water injection pipe is communicated with the water injection well pipe.

6. The microorganism release plate device for organically contaminated land according to claim 3, characterized in that: A microorganism attachment plate fixing hole is provided on the upper part of the microorganism attachment plate, and the microorganism attachment plate fixing hole is arranged correspondingly to the shell fixing hole; A microorganism attachment area is arranged in the microorganism attachment plate below the fixing hole of the microorganism attachment plate, and the microorganism attachment area is a rough blended mesh.

7. A method for using the microorganism release plate device for organically contaminated land according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Select the microbial remediation area of ​​the organic polluted land for layout, build the first upper water level storage tank at the upstream of the remediation area, and build the second lower water level storage tank in the middle of the remediation area; S2, constructing a first microbial release plate group in the repair area between the first upper water level storage tank and the second lower water level storage tank, wherein the first microbial release plate group includes a plurality of microbial release plate devices; S3, constructing a second microorganism release plate group downstream of the second lower water level storage tank, wherein the second microorganism release plate group includes a plurality of microorganism release plate devices; S4, constructing a microorganism release plate device downstream of the second microorganism release plate group, and constructing an underground temperature signal well in the second microorganism release plate group; S5. Build a group of pumping wells at the far downstream of the restoration area; S6, inserting the microorganism attachment plate into the slot of the release plate housing, starting water pumping in the pumping well, and replenishing the pumped water into the first upper water level storage tank and the second lower water level storage tank, forming a water body circulation in the repair area; S7. Inject groundwater or warm water into the water injection well plate. The groundwater or warm water flows through the microbial attachment plate during its flow downstream. The microbial species on the microbial attachment plate enter the soil along with the flowing groundwater or warm water, thereby achieving the treatment of organically polluted land.

8. The application method according to claim 7, characterized in that: In step S2, the first 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, and the three microorganism release plate devices are respectively located at three vertices of the isosceles triangle microorganism release plate structure.

9. The application method according to claim 8, characterized in that: In step S3, 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; One of the microorganism release plate devices is located at the vertex of the isosceles triangle microorganism release plate structure, and the other two microorganism release plate devices are located at the waist of the isosceles triangle microorganism release plate structure; In step S4, underground temperature signal wells are constructed at the middle horizontal position of the microorganism release plate devices at the waists of both sides of the isosceles triangle microorganism release plate structure.

10. The application method according to claim 7, characterized in that: In step S5, the pumping well group includes several pumping wells, and the pumping wells form an isosceles triangle pumping well group, and three pumping wells are respectively located at the vertices of the isosceles triangle pumping well group.

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