A biodegradable permeable reactive wall module and permeable reactive wall

Abstract

This invention discloses a biodegradable permeable reactive wall module and a permeable reactive wall. The permeable reactive wall module includes an installation bag made of biodegradable fabric material. The installation bag is flexible and foldable. An opening is provided at the upper end of the installation bag along its height direction. Multiple cavities are spaced apart along the thickness direction inside the installation bag. These cavities are used to fill the same or different active fillers and to treat pollutants in the groundwater as it penetrates the installation bag along its thickness direction. A first hardening blanket and a second hardening blanket are respectively provided on the outer side of the water-facing side and the outer side of the backwater side of the installation bag along its thickness direction. Both the second and first hardening blankets have first through holes formed along their thickness directions. A third hardening blanket is provided on the lower side of the installation bag along its height direction. This invention is biodegradable, does not cause secondary pollution, and allows for adjustment of the active material thickness to adapt to changes in pollutant concentrations in different sites.

Description

Technical Field

[0001] This invention relates to the field of groundwater pollution remediation and treatment technology, specifically to a biodegradable permeable reactive wall module and a permeable reactive wall. Background Technology

[0002] A permeable reactive wall is a technology that uses a wall filled with reactive material installed across the cross-section of the contaminated groundwater flow path to create a passive reactive zone in contact with the groundwater. This zone retains and degrades pollutants in the groundwater, thus achieving the goal of remediating groundwater pollution.

[0003] Currently, modular permeable reactive walls have emerged, which are formed by assembling multiple permeable reactive wall modules. However, existing permeable reactive wall modules are mostly rigid steel or plastic structures. These rigid steel or plastic permeable reactive wall modules will corrode and cause secondary pollution after long-term operation, and the thickness of the active material cannot be adjusted to adapt to changes in pollutant concentrations in different sites. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the assembled modules of the existing assembled permeable reactive wall, which are prone to secondary pollution due to corrosion and cannot adjust the thickness of the active material to adapt to the concentration changes of pollutants in different plots. Thus, the present invention provides a biodegradable permeable reactive wall module and a permeable reactive wall.

[0005] According to a first aspect of the present invention, a biodegradable permeable reactive wall module is provided for assembling a permeable reactive wall, the module comprising:

[0006] The installation bag is made of biodegradable fabric material. The installation bag is flexible and foldable. The installation bag has an opening at the upper end along the height direction. The installation bag has multiple cavities spaced apart along the thickness direction. The cavities are used to fill the same or different active fillers and are used to treat pollutants in the groundwater when the groundwater penetrates the installation bag along the thickness direction.

[0007] The first hardening blanket is disposed on the outer side of the water-facing surface of the installation bag along the thickness direction;

[0008] The second hardening blanket is disposed on the outer side of the back surface of the installation bag along the thickness direction, and both the second hardening blanket and the first hardening blanket are formed with a first through hole along the thickness direction.

[0009] The third hardening blanket is disposed on the lower side of the mounting bag body along the height direction.

[0010] According to the present invention, a biodegradable permeable reactive wall module has at least the following technical advantages: 1. By using biodegradable fabric material to make the installation bag, and the installation bag being foldable and deformable, compared with the rigid steel or plastic structure assembly modules in the prior art, which are costly and require prefabrication before being sent to the construction site, the installation bag of the permeable reactive wall module in this embodiment is inexpensive and easy to manufacture. During the assembly and construction of the permeable reactive wall using the permeable reactive wall module of this embodiment, the installation bag can be folded to reduce the space occupied during transportation, and the weight is lighter. Furthermore, the active filler can be filled on-site, making transportation convenient and cost-effective. At the same time, because the installation bag is made of biodegradable organic material, the installation bag will gradually degrade over time, without generating secondary pollution, and can provide nutrients for underground microorganisms during degradation, thereby increasing the number of underground microorganisms and improving the effect of the permeable reactive wall in remediating pollutants. 2. By installing multiple cavities spaced along the thickness direction within the bag, and by allowing on-site filling of activated filler within the permeable reactive wall module, the system can: 1) fill different activated fillers into each cavity according to the needs of groundwater remediation and treatment in sites with multiple pollutants, treating multiple pollutants simultaneously; 2) select the appropriate amount of activated filler to fill the cavity based on the concentration of pollutants in sites with the same type of pollutant, flexibly adjusting the thickness of the activated material to adapt to changes in pollutant concentration in different sites; and 3) adjust the thickness of the activated filler corresponding to the type of pollutant based on the concentration changes in a particular type of pollutant in a site with multiple pollutants, making it more flexible in application. 3. By installing a first hardening blanket and a second hardening blanket on the outer side of the water-facing side and the outer side of the back side of the installation bag along the thickness direction, respectively, and a third hardening blanket on the lower side of the installation bag along the height direction, the first, second, and third hardening blankets, which are flexible before absorbing water, can fit against the trench wall during installation to prevent the trench wall from collapsing. After absorbing groundwater, they harden to provide support for the installation bag, ensuring that the structural strength of the biodegradable permeable reactive wall module and the combined permeable reactive wall meets the requirements. It can be installed directly after the trench is formed by excavating the soil, without the need to pre-embed steel structures in the trench, thus reducing the construction cost and difficulty of the permeable reactive wall.

[0011] Preferably, a first flow-blocking portion is provided on one end face of the first hardening blanket away from the installation bag body along the thickness direction. The projected portion of the first flow-blocking portion along the thickness direction overlaps with the first hardening blanket. The first flow-blocking portion is parallel to the first hardening blanket and is integrally formed with the first hardening blanket using the same material. The first flow-blocking portion has a flow-blocking state that covers the end of the gap between two adjacent installation bags of the assembled permeable reaction wall facing each other along the length direction toward the direction of groundwater flow.

[0012] Preferably, a second flow-blocking portion is provided on one end face of the second hardening blanket away from the installation bag body along the thickness direction. The projected portion of the second flow-blocking portion along the thickness direction overlaps with the second hardening blanket. The second flow-blocking portion is parallel to the second hardening blanket and is integrally formed from the same material as the second hardening blanket. The second flow-blocking portion has a flow-blocking state that covers the end of the gap between two adjacent installation bags of the assembled permeable reaction wall facing each other along the length direction toward the direction of groundwater outflow.

[0013] Preferably, the first flow-blocking portion is located at the opposite rear end of the first hardened blanket along its length, and the second flow-blocking portion is located at the opposite front end of the second hardened blanket along its length.

[0014] Preferably, the installation bag body is provided with a first partition and a second partition at intervals along the thickness direction. The first partition and the second partition divide the interior of the installation bag body into a first cavity, a second cavity, and a third cavity sequentially along the thickness direction from the water-facing side to the backwater side. The first cavity and the third cavity are used to fill the same active filler or different active fillers. The active filler filled in the second cavity is different from the active filler filled in the first cavity. The first partition and the second partition are made of the same material as the installation bag body. Both ends of the first partition along the length direction are provided with an unfoldable first fold between them and the inner wall of the installation bag body.

[0015] Preferably, both ends of the second partition strip along its length are provided with an unfoldable second fold between them and the inner wall of the mounting bag.

[0016] Preferably, a fourth hardening blanket pipe is arranged in the second cavity along the height direction, and the lower ends of the mounting bag and the third hardening blanket are both perforated along the height direction, with the perforations communicating with the inner hole of the fourth hardening blanket pipe.

[0017] Preferably, a first sensor assembly for detecting pH, water temperature, conductivity, and dissolved oxygen is provided on the side of the first partition facing the second partition; a second sensor assembly for detecting the degradation progress of the installation bag is provided on the inner wall of the installation bag.

[0018] Preferably, the inner wall of the mounting bag is provided with at least one of steel wire mesh, nylon mesh, or fiberglass mesh to increase the support strength.

[0019] According to a second aspect of the present invention, a permeable reactive wall includes the biodegradable permeable reactive wall module provided in the first aspect.

[0020] According to the present invention, a permeable reactive wall has at least the following technical effects:

[0021] 1. By decomposing the permeable reactive wall into multiple biodegradable permeable reactive wall modules, compared to a monolithically constructed permeable reactive wall, this permeable reactive wall can be assembled by selecting different numbers of biodegradable permeable reactive wall modules according to the actual required length, thus flexibly constructing permeable reactive walls of different lengths. 2. By using biodegradable fabric-based materials to create the installation bags, which are foldable and deformable, the cost of the installation bags in the biodegradable permeable reaction wall modules is lower and easier to manufacture compared to the rigid steel or plastic structures used in existing technologies. These modules are costly and require prefabrication before being transported to the construction site. During the assembly of the permeable reaction wall, the installation bags can be folded to reduce transportation space and weight. Activated filler can be added on-site, making transportation convenient and cost-effective. Furthermore, because the installation bags are made of biodegradable organic materials, they gradually degrade over time, preventing secondary pollution and providing nutrients to underground microorganisms during degradation. This promotes microbial growth and improves the remediation effect of the permeable reaction wall. After the installation bags degrade, the barriers between the individual biodegradable permeable reaction wall modules along their length disappear, allowing the activated filler to automatically collapse and fill any gaps that may appear during installation, further preventing preferential flow and contaminant leakage. 3. By installing multiple cavities spaced along the thickness direction within the bag, and by allowing on-site filling of activated filler within the permeable reactive wall module, the system can: 1) fill each cavity with different activated filler to address groundwater pollution remediation and treatment needs in sites with multiple pollutants, treating multiple pollutants simultaneously; 2) adjust the amount of activated filler in each cavity based on the concentration of pollutants in sites with the same type of pollutant, flexibly adjusting the thickness of the activated material to accommodate varying pollutant concentrations in different sites; and 3) based on the different pollutant concentrations along the length of the permeable reactive wall (e.g., higher concentrations in the middle and lower concentrations on the sides), the system can fill the central biodegradable permeable reactive wall module with more activated filler and the side modules with less, saving costs. This allows for flexible control of the activated filler within each biodegradable permeable reactive wall module within a specific range, creating a specialized treatment method.4. By setting a first hardening blanket and a second hardening blanket on the outer side of the water-facing side and the outer side of the back side of the installation bag along the thickness direction, respectively, and setting a third hardening blanket on the lower side of the installation bag along the height direction, the first, second and third hardening blankets, which are flexible before absorbing water, can fit against the trench wall during installation to prevent the trench wall from collapsing. After absorbing groundwater, they harden to provide support for the installation bag, ensuring that the structural strength of the biodegradable permeable reactive wall module and the combined permeable reactive wall meets the requirements. It can be installed directly after the trench is formed by excavating the soil, without the need to pre-embed steel structures in the trench, thus reducing the construction cost and difficulty of the permeable reactive wall.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of a biodegradable permeable reactive wall module according to an embodiment of the present invention;

[0025] Figure 2 for Figure 1 Another structural diagram from a different perspective;

[0026] Figure 3 This is a top view of a biodegradable permeable reactive wall module according to an embodiment of the present invention;

[0027] Figure 4 This is a front view schematic diagram of the cross-sectional structure of a biodegradable permeable reactive wall module according to an embodiment of the present invention;

[0028] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0029] Figure 6 This is a bottom view of a biodegradable permeable reactive wall module according to an embodiment of the present invention;

[0030] Figure 7 A top view schematic diagram of the assembly of a biodegradable permeable reactive wall module according to two embodiments of the present invention;

[0031] Figure 8 for Figure 7Enlarged view of point B in the middle;

[0032] Figure 9 This is a schematic diagram of the structure of a permeable reactive wall according to an embodiment of the present invention.

[0033] Figure label:

[0034] 1-Permeation reaction wall module, 11-Installation bag body, 111-First partition, 112-Second partition, 113-First cavity, 114-Second cavity, 115-Third cavity, 116-First fold, 117-Second fold, 12-First hardening blanket, 121-First through hole, 122-First flow blocking part, 13-Second hardening blanket, 131-Second flow blocking part, 14-Third hardening blanket, 141-Perforation, 15-Fourth hardening blanket pipe, 16-First sensor assembly, 17-Second sensor assembly, 18-Handle. Detailed Implementation

[0035] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] Example 1

[0040] like Figures 1 to 5 The diagram shows a biodegradable permeable reactive wall module provided in this embodiment, used for assembling a permeable reactive wall. The module includes an installation bag 11 made of biodegradable fabric material. The installation bag 11 is flexible and foldable. An opening is provided at the upper end of the installation bag 11 along its height direction. Multiple cavities are spaced apart within the installation bag 11 along its thickness direction. These cavities are used to fill the same or different active fillers and to treat pollutants in the groundwater when it penetrates the installation bag 11 along its thickness direction. A first hardening blanket 12 is provided on the water-facing side of the installation bag 11 along its thickness direction, and a second hardening blanket 13 is provided on the backwater side of the installation bag 11 along its thickness direction. Both the second hardening blanket 13 and the first hardening blanket 12 have a first through hole 121 formed along their thickness directions. A third hardening blanket 14 is provided on the lower side of the installation bag 11 along its height direction. It is understood that the thickness direction described in this embodiment refers to... Figure 1 The thickness direction shown in the figure, and the height direction in this embodiment of the invention refer to... Figure 1 The height direction is shown in the figure.

[0041] The biodegradable permeable reactive wall module 1 of this embodiment uses a biodegradable fabric-based material to make the installation bag 11, which is foldable and deformable. Compared with the rigid steel or plastic structure assembly modules in the prior art, which are expensive and require prefabrication before being sent to the construction site, the installation bag 11 of the permeable reactive wall module 1 of this embodiment is inexpensive and easy to manufacture. During the assembly and construction of the permeable reactive wall using the permeable reactive wall module 1 of this embodiment, the installation bag 11 can be folded to reduce the space occupied during transportation and is lighter in weight. Activated filler can be added on-site, making transportation convenient and cost-effective. At the same time, because the installation bag 11 is made of biodegradable organic material, it will gradually degrade over time, without generating secondary pollution, and can provide nutrients for underground microorganisms during degradation, thereby increasing the number of underground microorganisms and improving the remediation effect of the permeable reactive wall on pollutants. Furthermore, by setting multiple cavities at intervals along the thickness direction within the installation bag 11, and by allowing the permeable reactive wall module 1 to be filled with activated filler on-site, different activated fillers can be filled into each cavity according to the needs of groundwater pollution remediation and treatment in sites with multiple pollutants, thus treating multiple pollutants at once. Secondly, the corresponding number of activated fillers can be selected to fill the cavity according to the concentration of pollutants in sites with the same type of pollutant, flexibly adjusting the thickness of the activated material to adapt to changes in pollutant concentration in different sites. Finally, the thickness of the activated filler corresponding to that type of pollutant can be adjusted according to the changes in the concentration of a certain type of pollutant in sites with multiple pollutants, making it more flexible in use. In this embodiment, a first hardening blanket 12 and a second hardening blanket 13 are respectively provided on the outer side of the water-facing side and the outer side of the back side of the installation bag 11 along the thickness direction, and a third hardening blanket 14 is provided on the lower side of the installation bag 11 along the height direction. Before absorbing water, the first hardening blanket 12, the second hardening blanket 13, and the third hardening blanket 14 are flexible and can fit against the trench wall during installation to prevent the trench wall from collapsing. After absorbing groundwater, they harden to provide support for the installation bag 11, ensuring that the structural strength of the biodegradable permeable reactive wall module 1 and the combined permeable reactive wall meets the requirements. It can be directly installed after the trench is formed by excavating the soil, without the need to pre-embed steel structures in the trench, reducing the construction cost and difficulty of the permeable reactive wall. In this embodiment, the biodegradable permeable reactive wall module 1 has an opening at the upper end of the installation bag 11 along the height direction, which facilitates the filling of the required active filler into the cavity of the installation bag 11 on the construction site.

[0042] It should be noted that the materials of the first hardening blanket 12, the second hardening blanket 13, and the third hardening blanket 14 can be cement or other water-hardening materials. These materials have the characteristics of being flexible before absorbing water and hardening after absorbing water.

[0043] Specifically, the biodegradable fabric-based material is one or more of polylactic acid, polyhydroxyalkanoate, starch plastic, bioengineering plastic, polyolefin, polyvinyl chloride, and polyvinyl alcohol Pva. The above materials are organic materials and completely non-toxic. They can be degraded by water over time without producing secondary pollution. They can also provide nutrients for underground microorganisms during degradation, thereby increasing the number of underground microorganisms and improving the effect of the infiltration reaction wall in remediating pollutants.

[0044] Specifically, the installation bag 11 is configured as a cuboid. By configuring the installation bag 11 as a cuboid, compared to the cylindrical shape of the assembly module in the prior art, after multiple biodegradable permeable reactive wall modules 1 of this embodiment are combined adjacently to form a permeable reactive wall, the contact surfaces between two adjacent biodegradable permeable reactive wall modules 1 can be basically completely and tightly contacted. This can effectively prevent groundwater from flowing through the gaps between the contact surfaces of two adjacent biodegradable permeable reactive wall modules 1, thus preventing preferential flow and pollutant escape. Furthermore, the flexible installation bag 11 can better fit the trench wall, making it less likely to create gaps and cause preferential flow, further improving the performance of preventing pollutant escape.

[0045] like Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8As shown, in some embodiments of the present invention, a first flow-blocking portion 122 is provided on one end face of the first hardening blanket 12 away from the mounting bag 11 along the thickness direction. The projected portion of the first flow-blocking portion 122 along the thickness direction overlaps with the first hardening blanket 12. The first flow-blocking portion 122 is parallel to the first hardening blanket 12, and the first flow-blocking portion 122 and the first hardening blanket 12 are integrally formed using the same material. Because the first flow-blocking portion 122 and the first hardening blanket 12 are both made of the same material, they are flexible before absorbing water (groundwater). Thus, in the process of assembling multiple biodegradable permeable reaction wall modules 1 into a permeable reaction wall, the first flow-blocking portion 122 of one biodegradable permeable reaction wall module 1 is abutted against and attached to the end face of the first hardening blanket 12 of the adjacent biodegradable permeable reaction wall module 1 away from the mounting bag 11 along the thickness direction. After the first flow-blocking portion 122 and the first hardening blanket 12 absorb groundwater and harden, one of the biodegradable permeable reaction wall modules... The first flow-blocking part 122 of the reactive wall module 1 overlaps and adheres to the first hardening blanket 12 of an adjacent biodegradable permeable reactive wall module 1, causing the first flow-blocking part 122 to enter a flow-blocking state. The first flow-blocking part 122 covers and seals the gap between the two adjacent installation bags 11 of the assembled permeable reactive wall along the length direction facing the end facing the direction of groundwater flow, thereby effectively preventing groundwater from directly entering and passing through the gap between the two adjacent biodegradable permeable reactive wall modules 1, thus effectively avoiding preferential groundwater flow and further improving the performance of preventing pollutant escape. It is understood that the length direction described in the embodiments of the present invention refers to... Figure 1 or Figure 3 and Figure 7 The length direction is shown in the figure.

[0046] like Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8As shown, in some embodiments of the present invention, a second flow-blocking portion 131 is provided on one end face of the second hardening blanket 13 away from the mounting bag 11 along the thickness direction. The projected portion of the second flow-blocking portion 131 along the thickness direction overlaps with the second hardening blanket 13. The second flow-blocking portion 131 is parallel to the second hardening blanket 13, and the second flow-blocking portion 131 and the second hardening blanket 13 are integrally formed using the same material. Because the second flow-blocking portion 131 and the second hardening blanket 13 are both made of the same material, the second flow-blocking portion 131 and the second hardening blanket 13 are flexible before absorbing water (groundwater). Thus, in the process of assembling multiple biodegradable permeable reaction wall modules 1 into a permeable reaction wall, the second flow-blocking portion 131 of one biodegradable permeable reaction wall module 1 is abutted and attached to the end face of the second hardening blanket 13 of the adjacent biodegradable permeable reaction wall module 1 away from the mounting bag 11 along the thickness direction. After the blanket 13 absorbs and hardens groundwater, the second flow-blocking part 131 of one of the biodegradable permeable reactive wall modules 1 overlaps and adheres to the second hardened blanket 13 of the adjacent biodegradable permeable reactive wall module 1, so that the second flow-blocking part 131 enters the flow-blocking state. The second flow-blocking part 131 covers and seals the end of the gap between the two adjacent installation bags 11 of the assembled permeable reactive wall facing each other along the length direction, which faces the direction of groundwater flow. Together with the first flow-blocking part 122, it forms two flow-blocking defense lines located at the inlet and outlet ends of the gap between the two adjacent biodegradable permeable reactive wall modules 1 along the length direction, respectively. This ensures that even if groundwater enters the gap from the covered and sealed part of the first flow-blocking part 122 between the two adjacent biodegradable permeable reactive wall modules 1, it is not easy to cross the flow-blocking defense line formed by the second flow-blocking part 131 and flow out from the outlet end of the gap. This more effectively avoids preferential groundwater flow and further improves the performance of preventing pollutant escape.

[0047] like Figure 3 , Figure 6 and Figure 7 As shown, in some embodiments of the present invention, the first flow-blocking portion 122 is located at the opposite rear end of the first hardening blanket 12 along its length, and the second flow-blocking portion 131 is located at the opposite front end of the second hardening blanket 13 along its length. Figure 8As shown, this arrangement causes the gap between two adjacent biodegradable permeable reactive barrier modules 1 along the length direction, as well as the first flow-blocking part 122 and the second flow-blocking part 131 sealing the inlet and outlet ends of the gap, to form a "Z" shape. This makes it difficult for groundwater to pass through the flow-blocking barrier formed by the first flow-blocking part 122 and enter the gap from the inlet end, and even more difficult to pass through the flow-blocking barrier formed by the second flow-blocking part 131 and flow out from the outlet end of the gap. This more effectively avoids preferential groundwater flow and further improves the performance of preventing pollutant escape. It is understood that the relative front end and relative rear end along the length direction described in this embodiment are based on... Figure 3 or Figure 7 It is presented from the perspective of [the speaker / organization].

[0048] like Figures 1 to 4As shown, in some embodiments of the present invention, the installation bag 11 is provided with a first partition 111 and a second partition 112 spaced apart along the thickness direction. The first partition 111 and the second partition 112 divide the interior of the installation bag 11 into a first cavity 113, a second cavity 114 and a third cavity 115 sequentially along the thickness direction from the water-facing side to the back side. The first cavity 113 and the third cavity 115 are used to fill one or more of the following: microbial growth agent, hydraulically homogenized filler (such as quartz sand), primary treatment active material for groundwater pollutants, and tertiary treatment active material for groundwater pollutants. The first cavity 113 and the third cavity 115 are filled with the same active material. The second cavity 114 is used to fill one or more of the following: primary treatment active material for groundwater pollutants and secondary treatment active material for groundwater pollutants. The first partition 111 and the second partition 112 are made of the same material as the installation bag 11. Both ends of the first partition 111 along the length direction are provided with an unfoldable first folding portion 116 between them and the inner wall of the installation bag 11. Because the first fold 116 is flexible and can be unfolded when stretched, the amount of active filler to be filled into the first cavity 113 can be increased according to the changes in the concentration of pollutants in the groundwater. This is achieved by expanding the first fold 116 and compressing the space of the second cavity 114, thus reducing the space of the active filler that can be filled in the second cavity 114. Alternatively, the amount of active filler to be filled into the second cavity 114 can be increased, and the space of the first cavity 113 can be compressed by expanding the first fold 116, thus reducing the space of the active filler that can be filled in the first cavity 113. This allows for flexible adjustment of the thickness of the active filler in the first cavity 113 and the thickness of the active filler in the second cavity 114 to adapt to changes in the concentration of pollutants in the groundwater of different sites. In some embodiments, both the first cavity 113 and the third cavity 115 are filled with microbial growth agents. As the mounting bag 11 completely degrades, it provides organic nutrients for the microorganisms, allowing them to multiply. Simultaneously, the microbial growth agents in the first and third cavities 113 and 115 also contribute to microbial growth, further improving the treatment effect on groundwater pollutants. It should be noted that in specific applications, the active fillers filling the first and third cavities 113 and 115 can be reasonably varied according to the type of pollutants to be treated. For example, the active fillers filling the first and third cavities 113 and 115 can be different. Specifically, the first cavity 113 is filled with microbial growth agents, and the third cavity 115 is filled with primary active materials for treating groundwater pollutants.

[0049] To further expand the flexibility of adjusting the thickness of the active filler in the first cavity 113 or the third cavity 115, and the thickness of the active filler in the second cavity 114, such as... Figures 1 to 3As shown, specifically, both ends of the second divider 112 along the length direction are provided with an unfoldable second fold 117 between them and the inner wall of the mounting bag body 11.

[0050] like Figures 1 to 4 as well as Figure 6 As shown, in some embodiments of the present invention, a fourth hardening blanket pipe 15 is arranged in the second cavity 114 along the height direction. The lower ends of the mounting bag 11 and the third hardening blanket 14 are both formed with perforations 141 along the height direction. The perforations 141 are connected to the inner hole of the fourth hardening blanket pipe 15. Before filling the second cavity 114 with the corresponding active filler, a PVC pipe is inserted into the inner hole of the fourth hardening blanket pipe 15 to position the fourth hardening blanket pipe 15 so that it will not shift during the water absorption and hardening process, ensuring the verticality of the fourth hardening blanket pipe 15 after water absorption and hardening. After the fourth hardening blanket pipe 15 has absorbed water and hardened, the PVC pipe is removed, making it convenient to use as a sampling pipeline for sampling or as a reagent injection pipeline for injecting liquid reagents during the operation period of the permeable reactive wall. Compared with existing permeable reactive walls that require drilling wells to construct pipelines for sampling or reagent injection, the fourth hardening blanket pipe 15 of the biodegradable permeable reactive wall module 1 in this embodiment is easier to construct, more accurately positioned, and maintains better verticality; it is also flexible and foldable before water absorption, and lighter in weight, making it easy to transport. It should be noted that the material of the fourth hardening blanket pipe 15 can be cement or other water-hardening materials. These materials have the characteristics of being flexible before water absorption and hardening after water absorption.

[0051] like Figures 2 to 4As shown, in some embodiments of the present invention, a first sensor assembly 16 for detecting pH, water temperature, conductivity and dissolved oxygen is provided on the side of the first partition 111 facing the second partition 112; a second sensor assembly 17 for detecting the degradation progress of the installation bag 11 is provided on the inner wall of the installation bag 11. The first sensor assembly 16 monitors the pH, water temperature, conductivity, and dissolved oxygen levels within the biodegradable permeable reactive wall module 1 in real time. The system comprehensively analyzes the operating status of the biodegradable permeable reactive wall module 1 and the permeable reactive wall itself. When the monitoring system determines that the permeable reactive wall has become passivated due to prolonged operation, it alerts staff to rectify the situation. Specifically, the first sensor assembly 16 includes a pH sensor for detecting pH, a water temperature sensor for detecting water temperature, a conductivity sensor for detecting conductivity, and a dissolved oxygen sensor for detecting dissolved oxygen levels. Because the pH increases, temperature rises, conductivity increases, and dissolved oxygen decreases during the degradation of the installation bag 11, the second sensor assembly 17 monitors whether the pH, water temperature, conductivity, and dissolved oxygen levels near the installation bag 11 meet expectations, thus comprehensively assessing whether the installation bag 11 has degraded. Specifically, the second sensor assembly 17 includes a pH sensor for detecting pH, a water temperature sensor for detecting water temperature, a conductivity sensor for detecting conductivity, and a dissolved oxygen sensor for detecting dissolved oxygen levels. Meanwhile, by pre-sewing the first sensor assembly 16 into the interior of the installation bag 11, after filling the corresponding active filler and installing the biodegradable permeable reactive wall module 1 into the trench, and after the installation bag 11 degrades, the first sensor assembly 16 is buried in the designated position and depth, making the installation quick, convenient and accurate.

[0052] To facilitate the placement of the biodegradable permeable reactive wall module 1 in the excavated trench and ensure that the flexible installation bag 11 fits better against the trench wall, minimizing gaps and preferential flow, such as... Figure 1 and Figure 2 As shown, in some embodiments of the present invention, handles 18 are arranged opposite to each other on the two inner walls of the mounting bag 11 along the thickness direction, and the handles 18 are located at the upper end of the inner wall of the mounting bag 11 along the height direction.

[0053] To further improve the structural strength of the mounting bag 11, in some embodiments of the present invention, the inner wall of the mounting bag 11 is provided with at least one of steel wire mesh, nylon mesh or glass fiber mesh to increase the support strength.

[0054] Example 2

[0055] like Figure 9The diagram shows a permeable reactive wall provided in this embodiment, which is formed by sequentially assembling multiple modules. The modules are the biodegradable permeable reactive wall modules 1 described in Embodiment 1. By decomposing the permeable reactive wall of this embodiment into multiple biodegradable permeable reactive wall modules 1, compared to a monolithically constructed permeable reactive wall, the permeable reactive wall of this embodiment can be assembled with different numbers of biodegradable permeable reactive wall modules 1 according to the actual required length, flexibly constructing permeable reactive walls of different lengths. In this embodiment, the installation bag 11 is made of biodegradable fabric material, and the installation bag 11 is foldable and deformable. Compared to the rigid steel or plastic structure assembly modules in the prior art, which are costly and require prefabrication before being transported to the construction site, the installation bag 11 in the biodegradable permeable reactive wall modules 1 of this embodiment is inexpensive and easy to manufacture. During the assembly and construction of the permeable reactive wall of this embodiment using biodegradable permeable reactive wall modules 1, the installation bag 11 can be folded to reduce the space occupied during transportation, resulting in lighter weight, and the active filler can be added on-site. It is convenient to transport and has low transportation costs. At the same time, because the installation bag 11 is made of biodegradable organic material, the installation bag 11 will gradually degrade over time, which will not produce secondary pollution, but will also provide nutrients for underground microorganisms during degradation, thereby increasing the number of underground microorganisms and improving the effect of the permeable reactive wall in remediating pollutants. After the installation bag 11 degrades, the barriers between the various biodegradable permeable reactive wall modules 1 in the permeable reactive wall assembly of this embodiment along the length direction will disappear, and the active filler can automatically collapse to fill the gaps that may occur during installation, further avoiding the generation of preferential flow and preventing pollutant leakage. Furthermore, by providing multiple cavities spaced along the thickness direction within each installation bag 11, and by allowing the biodegradable permeable reactive wall module 1 to be filled with active filler on-site, different active fillers can be filled into each cavity according to the needs of groundwater pollution remediation and treatment in sites with multiple pollutants, thus treating multiple pollutants at once. Secondly, based on the concentration of pollutants in sites with the same type of pollutant, the corresponding number of active fillers can be selected to fill the cavity, flexibly adjusting the thickness of the active material to adapt to changes in pollutant concentration in different sites. Finally, based on the different concentrations of pollutants along the length of the permeable reactive wall in this embodiment (specifically, the concentration of pollutants is higher in the middle and lower on both sides), more active filler can be filled into the biodegradable permeable reactive wall module 1 located in the middle of the permeable reactive wall in this embodiment, and less active filler can be filled into the biodegradable permeable reactive wall module 1 located on both sides of the permeable reactive wall in this embodiment, saving costs. This achieves flexible control of the active filler in each biodegradable permeable reactive wall module 1 within a certain range, forming a specialized treatment method.By providing a first hardening blanket 12 and a second hardening blanket 13 on the outer side of the water-facing side and the outer side of the back side of the installation bag 11 along the thickness direction, and a third hardening blanket 14 on the lower side of the installation bag 11 along the height direction, the first hardening blanket 12, the second hardening blanket 13 and the third hardening blanket 14, which are flexible before absorbing water, can fit against the trench wall during installation to prevent the trench wall from collapsing. After absorbing groundwater, they harden to provide support for the installation bag 11, ensuring that the structural strength of the biodegradable permeable reactive wall module 1 and the permeable reactive wall of this embodiment meets the requirements. It can be directly installed after the trench is formed by excavating the soil, without the need to pre-embed steel structures in the trench, thus reducing the construction cost and difficulty of the permeable reactive wall of this embodiment.

[0056] It is understood that the length direction of the permeable reactive wall in this embodiment is parallel to... Figure 9 The length directions shown are parallel.

[0057] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A biodegradable permeable reactive wall module for assembling a permeable reactive wall, characterized in that, The module includes: The installation bag (11) is made of biodegradable fabric material. The installation bag (11) is flexible and foldable. The installation bag (11) has an opening at the upper end of the relative height direction. The installation bag (11) has multiple cavities spaced apart along the thickness direction. The cavities are used to fill the same or different active fillers and to treat pollutants in the groundwater when the groundwater penetrates the installation bag (11) along the thickness direction. The first hardening blanket (12) is disposed on the outer side of the water-facing surface of the mounting bag (11) along the thickness direction; The second hardening blanket (13) is disposed on the outer side of the backwater surface of the installation bag (11) along the thickness direction. Both the second hardening blanket (13) and the first hardening blanket (12) are formed with a first through hole (121) along the thickness direction. The third hardening blanket (14) is disposed on the lower side of the mounting bag (11) along the height direction; The materials of the first hardening blanket (12), the second hardening blanket (13) and the third hardening blanket (14) have the characteristics of being flexible before absorbing water and hardening after absorbing water.

2. The biodegradable permeable reactive wall module according to claim 1, characterized in that, The first hardening blanket (12) has a first flow-blocking part (122) on one end face away from the installation bag (11) along the thickness direction. The projection of the first flow-blocking part (122) along the thickness direction overlaps with the first hardening blanket (12). The first flow-blocking part (122) is parallel to the first hardening blanket (12), and the first flow-blocking part (122) and the first hardening blanket (12) are integrally formed using the same material. The first flow-blocking part (122) has a flow-blocking state that covers the end of the gap between two adjacent installation bags (11) of the assembled permeable reaction wall facing each other along the length direction towards the direction of groundwater flow.

3. The biodegradable permeable reactive wall module according to claim 2, characterized in that, The second hardening blanket (13) has a second flow-blocking part (131) on one end face away from the installation bag (11) along the thickness direction. The projection of the second flow-blocking part (131) along the thickness direction overlaps with the second hardening blanket (13). The second flow-blocking part (131) is parallel to the second hardening blanket (13), and the second flow-blocking part (131) and the second hardening blanket (13) are integrally formed using the same material. The second flow-blocking part (131) has a flow-blocking state that covers the end of the gap between two adjacent installation bags (11) of the assembled permeable reaction wall facing each other along the length direction towards the direction of groundwater flow.

4. A biodegradable permeable reactive wall module according to claim 3, characterized in that, The first flow-blocking part (122) is located at the opposite rear end of the first hardening blanket (12) along the length direction, and the second flow-blocking part (131) is located at the opposite front end of the second hardening blanket (13) along the length direction.

5. A biodegradable permeable reactive wall module according to any one of claims 1 to 4, characterized in that, The installation bag (11) is provided with a first partition (111) and a second partition (112) at intervals along the thickness direction. The first partition (111) and the second partition (112) divide the interior of the installation bag (11) into a first cavity (113), a second cavity (114) and a third cavity (115) along the thickness direction from the water-facing side to the back side. The first cavity (113) and the third cavity (115) are used to fill the same active filler or different active fillers. The active filler filled in the second cavity (114) is different from the active filler filled in the first cavity (113). The first partition (111) and the second partition (112) are made of the same material as the installation bag (11). The first partition (111) is provided with an unfoldable first fold (116) between its two ends along the length direction and the inner wall of the installation bag (11).

6. A biodegradable permeable reactive wall module according to claim 5, characterized in that, The second partition (112) has an unfoldable second fold (117) between its two ends along the length direction and the inner wall of the mounting bag (11).

7. A biodegradable permeable reactive wall module according to claim 5, characterized in that, The second cavity (114) has a fourth hardening blanket pipe (15) arranged along the height direction. The lower ends of the mounting bag (11) and the third hardening blanket (14) are both formed with perforations (141) along the height direction. The perforations (141) are connected to the inner hole of the fourth hardening blanket pipe (15).

8. A biodegradable permeable reactive wall module according to claim 5, characterized in that, A first sensor assembly (16) for detecting pH, water temperature, conductivity and dissolved oxygen is provided on the side of the first septum (111) facing the second septum (112); a second sensor assembly (17) for detecting the degradation progress of the mounting bag (11) is provided on the inner wall of the mounting bag (11).

9. A biodegradable permeable reactive wall module according to claim 1, characterized in that, The enclosure of the mounting bag (11) is provided with at least one of a steel wire mesh, nylon mesh, or fiberglass mesh to increase the support strength.

10. A permeable reactive barrier, characterized in that, Includes the biodegradable permeable reactive wall module (1) as described in any one of claims 1 to 9 above.

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