Underground water treatment system and building method thereof

Abstract

The invention relates to the technical field of water treatment, and discloses an underground water treatment system and a construction method thereof, the treatment system comprises a plurality of biological reaction core devices, and the plurality of biological reaction core devices are arranged under the earth surface; any two pieces of biological reaction core equipment are arranged at intervals; each piece of biological reaction core equipment is filled with a porous core material loaded with microorganisms, micro-nano bubbles and microorganisms in each piece of biological reaction core equipment are diffused outwards, and respective corresponding adsorption and degradation influence areas are formed around each piece of biological reaction core equipment; all the adsorption and degradation influence areas form a continuous biological reaction zone, and underground water flows through the continuous biological reaction zone. As respective corresponding adsorption and degradation influence areas can be formed around each piece of biological reaction core equipment, the biological reaction core equipment which is distributed in a dotted manner can form a continuous biological reaction zone. Furthermore, continuous and long grooves can be prevented from being excavated in the petrochemical enterprise land parcels, so that the safety can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and specifically relates to a groundwater treatment system and a method for building a groundwater treatment system. Background Art

[0002] The groundwater of petrochemical enterprises is regarded as the object of key control and treatment because it contains pollutants with high biological toxicity and strong carcinogenic, teratogenic and mutagenic properties.

[0003] Currently, technologies such as permeable reactive barriers, interception ditches, and vertical barrier walls are mostly used to treat groundwater. However, when implementing these technologies, continuous trenches need to be excavated, which poses a greater potential safety hazard when applying these technologies to the plots of petrochemical enterprises with complex production facilities and flammable and explosive production environments. Summary of the Invention

[0004] The purpose of the present invention is to overcome the problem in the prior art that due to the need to excavate continuous trenches, the current groundwater treatment technologies have a greater potential safety hazard when applied to the plots of petrochemical enterprises with complex production facilities and flammable and explosive production environments, and to provide a groundwater treatment system and a method for building a groundwater treatment system.

[0005] To achieve the above purpose, in the first aspect of the present invention, a groundwater treatment system is provided. The treatment system includes a plurality of biological reaction core devices, and the plurality of biological reaction core devices are arranged below the ground surface;

[0006] Among the plurality of biological reaction core devices, any two biological reaction core devices are arranged at intervals from each other;

[0007] Each biological reaction core device is filled with a porous core material loaded with microorganisms. Each biological reaction core device adsorbs and degrades the surrounding pollutants, and the micro-nano bubbles and microorganisms in each biological reaction core device diffuse outwards to form respective corresponding adsorption and degradation influence regions around each biological reaction core device;

[0008] The adsorption and degradation influence regions corresponding to each biological reaction core device form a continuous biological reaction zone, and the groundwater flows through the continuous biological reaction zone.

[0009] In the embodiments of the present application, the continuous biological reaction zone includes a first row of continuous biological reaction zones and a second row of continuous biological reaction zones, and the plurality of biological reaction core devices include a plurality of first biological reaction core devices and a plurality of second biological reaction core devices;

[0010] The adsorption and degradation influence regions corresponding to each first biological reaction core device form the first row of continuous biological reaction zones, and the adsorption and degradation influence regions corresponding to each second biological reaction core device form the second row of continuous biological reaction zones;

[0011] The first row of continuous biological reaction zones is located upstream of the second row of continuous biological reaction zones.

[0012] In the embodiment of the present application, the treatment capacity of the first biological reaction core device for pollutants is superior to that of the second biological reaction core for pollutants.

[0013] In the embodiment of the present application, the adsorption and degradation influence regions corresponding to any two adjacent first biological reaction core devices are tangent, and the adsorption and degradation influence regions corresponding to any adjacent first biological reaction core device and second biological reaction core device are tangent.

[0014] In the embodiment of the present application, any second biological reaction core device is located on the perpendicular bisector of the line connecting two adjacent first biological reaction core devices.

[0015] In the embodiment of the present application, the biological reaction core device includes a core body tube, an outer sieve tube, an aeration disc, an aeration pipeline, an air pump, a control shell, a power supply photovoltaic panel, a power conversion controller, a lithium battery, an environmental monitoring sensor, and a data control and transmission device;

[0016] Wherein, the outer sieve tube is sleeved outside the core body tube;

[0017] The control shell is located at the upper end of the outer sieve tube; the aeration disc is located inside the core body tube and at the bottom of the core body tube; the air pump is arranged in the control shell, the aeration pipeline is attached to the outer wall of the core body tube, and the air pump is connected to the aeration disc through the aeration pipeline;

[0018] The power supply photovoltaic panel is arranged on the top of the control shell, and the power conversion controller and the lithium battery are arranged in the control shell;

[0019] The environmental monitoring sensor is attached to the outer wall of the core body tube, the data control and transmission device is arranged in the control shell, and the environmental monitoring sensor is connected to the data control and transmission device;

[0020] The power conversion controller is respectively connected to the power supply photovoltaic panel, the lithium battery, the air pump, and the data control and transmission device.

[0021] In the embodiment of the present application, the first biological reaction core device further includes a degradation enhancement device for enhancing the degradation effect of pollutants.

[0022] In the embodiment of the present application, the degradation enhancement device includes an optical core, a light source controller, and a photocatalyst;

[0023] The optical core is disposed within the core tube, the light source controller is disposed within the control housing, the optical core is connected to the light source controller, the light source controller is further connected to the power conversion controller, and the photocatalyst is filled within the core tube.

[0024] In an embodiment of the present application, the degradation enhancement device includes an ultrasonic emission module and an ultrasonic controller;

[0025] The ultrasonic emission module is disposed within the core tube, the ultrasonic controller is disposed within the control housing, the ultrasonic emission module is connected to the ultrasonic controller, and the ultrasonic controller is further connected to the power conversion controller.

[0026] In an embodiment of the present application, the degradation enhancement device includes a chemical injection pipe and a chemical injection pump, and the treatment system further includes a chemical tank;

[0027] The chemical tank is disposed above the ground surface, the chemical injection pipe is disposed within the core tube, the chemical injection pump is disposed within the control housing, the chemical injection pipe is connected to the chemical injection pump, and the chemical injection pump is further connected to the power conversion controller.

[0028] In an embodiment of the present application, the degradation enhancement device includes an electric field generating device and an electric field controller;

[0029] The electric field generating device is disposed within the core tube, the electric field controller is disposed within the control housing, the electric field generating device is connected to the electric field controller, and the electric field controller is further connected to the power conversion controller.

[0030] In an embodiment of the present application, the treatment system further includes a plurality of first monitoring wells and a plurality of second monitoring wells;

[0031] The plurality of first monitoring wells are disposed upstream of the continuous bioreaction zone, and the plurality of second monitoring wells are disposed downstream of the continuous bioreaction zone.

[0032] A second aspect of the present invention provides a method for building a groundwater treatment system for building the groundwater treatment system provided in the first aspect of the present application, the building method including:

[0033] Constructing a three-dimensional spatial distribution model of soil pollution in the target area and determining the facility layout in the target area;

[0034] Based on the three-dimensional spatial distribution model of soil pollution and the facility layout, determining the position information of the continuous bioreaction zone, and establishing the continuous bioreaction zone based on the position information.

[0035] In the embodiments of the present application, after constructing the three-dimensional spatial distribution model of soil pollution in the target area and determining the facility layout of the target area, before determining the position information of the continuous biological reaction zone according to the three-dimensional spatial distribution model of soil pollution and the facility layout, the construction method further includes:

[0036] Constructing a groundwater pollutant movement and migration model corresponding to the three-dimensional spatial distribution model of soil pollution, and constructing a three-dimensional solid model diagram corresponding to the facility layout;

[0037] The determining the position information of the continuous biological reaction zone according to the three-dimensional spatial distribution model of soil pollution and the facility layout includes:

[0038] Based on the groundwater pollutant movement and migration model and the three-dimensional solid model diagram, determining the position information of the continuous biological reaction zone.

[0039] In the embodiments of the present application, the determining the position information of the continuous biological reaction zone based on the groundwater pollutant movement and migration model and the three-dimensional solid model diagram includes:

[0040] Based on the groundwater pollutant movement and migration model, the three-dimensional solid model diagram, and the adsorption and degradation influence area corresponding to the biological reaction core device, determining the installation position of the biological reaction core device.

[0041] Through the above groundwater treatment system, the treatment system includes a plurality of biological reaction core devices, and the plurality of biological reaction core devices are arranged below the ground surface; among the plurality of biological reaction core devices, any two biological reaction core devices are spaced apart from each other; each biological reaction core device is filled with a porous core material loaded with microorganisms, and each biological reaction core device adsorbs and degrades the surrounding pollutants, and the micro-nano bubbles and microorganisms in each biological reaction core device diffuse outward to form their respective corresponding adsorption and degradation influence areas around each biological reaction core device; the adsorption and degradation influence areas corresponding to each biological reaction core device constitute a continuous biological reaction zone, and the groundwater flows through the continuous biological reaction zone. Since respective corresponding adsorption and degradation influence areas can be formed around each biological reaction core device, a continuous biological reaction zone can be formed based on the dot-like arranged biological reaction core devices. Furthermore, when treating the groundwater of a petrochemical enterprise, it is possible to avoid excavating a continuous and relatively long trench on the plot of the petrochemical enterprise, thereby improving safety.

[0042] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings are used to provide a further understanding of the embodiments of the present application, and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation to the embodiments of the present application. In the accompanying drawings:

[0044] Figure 1 and Figure 2 schematically shows a structural diagram of a groundwater treatment system according to an embodiment of the present application;

[0045] Figure 3-1 and Figure 3-2 schematically shows a structural diagram of a biological reaction core device according to an embodiment of the present application;

[0046] Figure 4-1 and Figure 4-2 schematically shows a structural diagram of another biological reaction core device according to an embodiment of the present application;

[0047] Figure 5 schematically shows a structural diagram of another groundwater treatment system according to an embodiment of the present application;

[0048] Figure 6-1 and Figure 6-2 schematically shows a structural diagram of yet another biological reaction core device according to an embodiment of the present application;

[0049] Figure 7-1 and Figure 7-2 schematically shows a structural diagram of yet another biological reaction core device according to an embodiment of the present application;

[0050] Figure 8-1 and Figure 8-2 schematically shows a structural diagram of yet another biological reaction core device according to an embodiment of the present application;

[0051] Figure 9 schematically shows a flowchart of a method for building a groundwater treatment system according to an embodiment of the present application;

[0052] Figure 10 schematically shows a schematic diagram of the setting position of a continuous biological reaction zone according to an embodiment of the present application.

[0053] Explanation of reference numerals

[0054] 100 - Groundwater treatment system; 101 - Biological reaction core device; 1011 - Core tube; 1012 - Outer screen tube; 1013 - Aeration disk; 1014 - Aeration pipeline; 1015 - Air pump; 1016 - Control shell; 1017 - Photovoltaic panel; 1018 - Power conversion controller; 1019 - Lithium battery; 10110 - Environmental monitoring sensor; 10111 - Data control and transmission device; 10112 - Optical core; 10113 - Light source controller; 10114 - Ultrasonic emission module; 10115 - Ultrasonic controller; 10116 - Chemical injection pipe; 10117 - Chemical injection pump; 101 - A - First biological reaction core device; 101 - B - Second biological reaction core device; 102 - Adsorption and degradation influence area; 103 - Continuous biological reaction zone; 1031 - First row of continuous biological reaction zones; 1032 - Second row of continuous biological reaction zones; 104 - First monitoring well; 105 - Second monitoring well. Detailed implementation manners

[0055] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It should be understood that the specific implementation manners described herein are only used to illustrate and explain the embodiments of the present application, and are not used to limit the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0056] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0057] In addition, if there are descriptions such as "first" and "second" involved in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0058] As described in the background art, the groundwater of petrochemical enterprises (especially those in production) contains many pollutants with high biological toxicity and strong carcinogenic, teratogenic and mutagenic properties. For example, total petroleum hydrocarbons (TPH), benzene series (BTEX), polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), etc. Therefore, the groundwater of petrochemical enterprises is regarded as the object of key control and treatment. For the treatment of groundwater pollutants, technologies such as permeable reactive barriers, interception ditches, and vertical barrier walls are currently mostly used. Among them, the permeable reactive barrier technology is to build a reactive barrier composed of reactive materials in the direction of the contaminated groundwater flow, and remove the pollutants in the groundwater through the adsorption, precipitation, degradation and other effects of the reactive materials. The interception ditch technology is to lay an interception ditch perpendicular to the groundwater flow direction, and install a high-permeability material, a water collection pipe network and a supporting water pump system in the ditch body to intercept and extract the upstream groundwater pollution plume. The vertical barrier wall technology is to build a physical barrier wall, such as a cement wall, a bentonite wall, etc., to block the pollutants in the site and avoid the diffusion of pollutants. These types of technologies all require the excavation of continuous and long trenches during implementation and rely on large construction machinery. However, the production facilities of petrochemical enterprise plots are complex, and the production environment is flammable and explosive, which makes these types of technologies have greater potential safety hazards when applied to petrochemical enterprise plots. For example, it may dig through pipelines and cables, may cause foundation collapse and affect the production facilities in the factory, and may cause combustion and explosion in the flammable and explosive production environment during the operation of large construction machinery.

[0059] In view of this, in one embodiment of the present application, a groundwater treatment system 100 is provided, as Figure 1 and Figure 2 shown ( Figure 1 which can be regarded as the top view of the groundwater treatment system 100), the groundwater treatment system 100 may include a plurality of biological reaction core devices 101, and the plurality of biological reaction core devices 101 are arranged below the ground surface; among the plurality of biological reaction core devices 101, any two biological reaction core devices 101 are spaced apart from each other; each biological reaction core device 101 is filled with a porous core material loaded with microorganisms, and each biological reaction core device 101 adsorbs and degrades the surrounding pollutants, and the micro-nano bubbles and microorganisms in each biological reaction core device diffuse outward to form respective corresponding adsorption and degradation influence regions 102 around each biological reaction core device 101; the adsorption and degradation influence regions corresponding to each biological reaction core device 101 constitute a continuous biological reaction zone 103, and the groundwater flows through the continuous biological reaction zone 103.

[0060] Among them, the biological reaction core device 101 can remove the pollutants in the groundwater based on microbial degradation.

[0061] As Figure 3-1 and Figure 3-2 shown ( Figure 3-1 is Figure 3-2In a perspective view), the bioreaction core device 101 may include a core tube 1011 and an outer sieve tube 1012, and the outer sieve tube 1012 is sleeved outside the core tube 1011. The bioreaction core device 101 is filled with a porous core material loaded with microorganisms. Specifically, the core tube 1011 may be filled with the core material, and the core material is a porous adsorbent material loaded with microbial degrading bacteria. The porous adsorbent material may include, but is not limited to, carbon-based materials, porous ceramsite, molecular sieves, carbon nanotubes, etc.

[0062] When specifically arranging the bioreaction core device 101, multiple bioreaction core devices 101 are all arranged below the ground surface and located downstream of the groundwater, so that the groundwater can flow through the areas where the multiple bioreaction core devices 101 are located, thereby achieving the removal of pollutants in the groundwater. Among them, the bioreaction core device 101 is arranged below the ground surface. Specifically, the upper end of the bioreaction core device 101 is above the groundwater level during the high water period, for example, exceeding the groundwater level line during the high water period by 0.3 m to 0.5 m; and the lower end of the bioreaction core device 101 is below the groundwater impervious floor, for example, lower than the impervious floor by 0.3 m to 0.5 m. Thus, it is possible to prevent untreated groundwater from escaping from the upper end or the lower end of the bioreaction core device 101.

[0063] When placing the bioreaction core device 101 below the ground surface, a placement hole can be drilled first by a drill, the outer sieve tube 1012 is inserted into the placement hole, and then the core tube 1011 pre-loaded with the porous core material loaded with microorganisms is inserted into the outer sieve tube 1012. In practical applications, when the treatment effect of the bioreaction core device 101 decreases, the core tube 1011 can also be pulled out, the core material in the core tube 1011 is replaced, and then inserted. When the groundwater pollution control project ends, the core tube 1011 can also be pulled out for recycling, and then the outer sieve tube 1012 is filled with the original soil of the plot.

[0064] In the embodiment of the present application, any two bioreaction core devices 101 are arranged at intervals. It can be understood that in the groundwater layer, multiple bioreaction core devices 101 are arranged in a dot pattern, and there is an interval distance between any two adjacent bioreaction core devices 101. In addition, in terms of the arrangement form, the arrangement line formed by sequentially connecting the multiple bioreaction core devices 101 can intersect the flow direction of the groundwater, presenting a form of "intercepting" the groundwater flow.

[0065] In the above embodiments, the pipe walls of the core pipe 1011 and the outer sieve pipe 1012 both have a plurality of pores, enabling groundwater to enter the core pipe 1011 successively through the pores of the outer sieve pipe 1012 and the pores of the core pipe 1011. Furthermore, the pollutants in the groundwater can be adsorbed by the core material in the core pipe 1011 and react with the microorganisms in the core material for degradation and removal. The reaction area inside the core pipe 1011 can also be referred to as the first reaction area. Meanwhile, the micro-nano bubbles and microorganisms in the core pipe 1011 can also diffuse into the water body outside the outer sieve pipe 1012 successively through the pores of the core pipe 1011 and the pores of the outer sieve pipe 1012, thereby forming a core material adsorption and aerobic microorganism degradation influence area 102, i.e., an adsorption and degradation influence area, around the biological reaction core device 101. This adsorption and degradation influence area can also be referred to as the second reaction area, and the reaction of microorganisms degrading pollutants can also occur in the second reaction area. For ease of description, the adsorption and degradation influence area can also be simply referred to as the influence area hereinafter.

[0066] Since the pipe wall of the outer sieve pipe 1012 has pores, in order to prevent sediment in the groundwater from clogging these pores, after inserting the outer sieve pipe 1012 into the placement hole, quartz sand can also be filled in the gap between the outer sieve pipe 1012 and the placement hole wall to filter the sediment. The particle size of the quartz sand can be 3 mm to 4 mm.

[0067] In the embodiments of the present application, each biological reaction core device 101 has a first reaction area and a second reaction area, and the second reaction area surrounds the biological reaction core device 101. In practical applications, the second reaction area can be regarded as cylindrical, as Figure 1 shown. The radius of the cylinder can be 1 m to 3 m. In specific implementation, the actual radius of the second reaction area can be obtained through on-site testing. For example, a biological reaction core device 101 can be placed below the ground surface to test the radius of its corresponding second reaction area. Then, biological reaction core devices identical to the biological reaction core device 101 used for testing have a second reaction area with a similar or identical range. Therefore, when setting the interval between the biological reaction core devices 101, it can be set based on the radius.

[0068] Furthermore, the influence areas 102 corresponding to each biological reaction core device 101 are arranged in sequence to form a continuous biological reaction zone 103. This continuous biological reaction zone 103 can also be regarded as a biological reaction "wall". Groundwater flows into this biological reaction "wall", and the pollutants in it are degraded inside the "wall", and the treated groundwater flows out of the "wall".

[0069] It can be understood that by adopting the groundwater treatment system 100 provided by the embodiments of the present application, the groundwater treatment system 100 includes a plurality of biological reaction core devices 101, and the plurality of biological reaction core devices 101 are arranged below the ground surface; among the plurality of biological reaction core devices 101, any two biological reaction core devices 101 are spaced apart from each other; each biological reaction core device 101 is filled with a porous core material loaded with microorganisms, and each biological reaction core device 101 adsorbs and degrades surrounding pollutants, and micro-nano bubbles and microorganisms in each biological reaction core device 101 diffuse outward to form respective corresponding adsorption and degradation influence regions 102 around each biological reaction core device 101; the adsorption and degradation influence regions corresponding to each biological reaction core device 101 constitute a continuous biological reaction zone 103, and groundwater flows through the continuous biological reaction zone 103. Since respective corresponding adsorption and degradation influence regions 102 can be formed around each biological reaction core device 101, a continuous biological reaction zone 103 can be formed based on the dot-shaped arranged biological reaction core devices 101. Furthermore, when treating the groundwater of petrochemical enterprises, it is possible to avoid excavating continuous and relatively long trenches on the petrochemical enterprise plot, thereby improving safety.

[0070] At the same time, based on the groundwater treatment system 100 provided by the embodiments of the present application, the engineering implementation difficulty is also greatly reduced. Moreover, since the groundwater treatment system 100 provided by the embodiments of the present application uses microorganisms to treat pollutants, the problem of secondary pollution of groundwater can also be avoided.

[0071] On the other hand, when the prior art adopts the permeable reactive barrier technology, with the passage of time, the reactive barrier will have a clogging problem. In the groundwater treatment system 100 of the present application, the biological reaction core devices 101 are arranged in a dot shape, so the clogging problem of the permeable reactive barrier can also be solved.

[0072] In practical applications, to further improve the treatment effect of the groundwater entering the core tube 1011 and the treatment effect of the groundwater in the adsorption and degradation influence region 102, in one implementation manner, the biological reaction core device 101 further includes an aeration disk 1013, an aeration pipe 1014, an air pump 1015, and a control shell 1016. As Figure 4-1 and Figure 4-2 ( Figure 4-2 For Figure 4-1 the top view of) shown, the control shell 1016 is located at the upper end of the outer sieve tube 1012, and the two are connected by a card slot. The upper end of the core tube 1011 is snapped into the concave sleeve at the lower part of the control shell 1016; the aeration disk 1013 is located inside the core tube 1011 and at the bottom of the core tube 1011; the air pump 1015 is arranged in the control shell 1016, the aeration pipe 1014 is attached to the outer wall of the core tube 1011, and the air pump 1015 is connected to the aeration disk 1013 through the aeration pipe 1014.

[0073] Among them, the aeration disc 1013 can be a micro-aeration disc, and the air pump 1015 can be a micro-air pump.

[0074] In the embodiment of the present application, based on the aeration disc 1013, the aeration pipeline 1014, and the air pump 1015, micro-nano-level oxygen can be provided for the microorganisms in the core tube 1011, so that an aerobic-anaerobic-anaerobic biofilm system is formed from the outside to the inside of the core material particles in the core tube 1011, which can improve the degradation ability of microorganisms to pollutants. At the same time, an aerobic zone will be formed around the biological reaction core device 101, improving the degradation ability of microorganisms in the adsorption and degradation influence area 102 to pollutants. Thus, the treatment effect of the groundwater entering the core tube 1011 and the treatment effect of the groundwater in the adsorption and degradation influence area 102 can be improved.

[0075] To facilitate the supply of electrical energy to the air pump 1015, in one embodiment, the biological reaction core device 101 further includes an energy-supplying photovoltaic panel 1017, a power conversion controller 1018, and a lithium battery 1019. As Figure 4-1 and Figure 4-2 shown, the energy-supplying photovoltaic panel 1017 is arranged on the top of the control shell 1016, the power conversion controller 1018 and the lithium battery 1019 are arranged in the control shell 1016, and the power conversion controller 1018 is respectively connected to the energy-supplying photovoltaic panel 1017, the lithium battery 1019, and the air pump 1015. Thus, the supply of energy to the air pump 1015 can be realized.

[0076] In the embodiment of the present application, the energy-supplying photovoltaic panel 1017 and the top of the control shell 1016 can be connected by means of flange screw holes. The shape of the energy-supplying photovoltaic panel 1017 can match the shape of the control shell 1016. For example, if the control shell 1016 is cylindrical, the energy-supplying photovoltaic panel 1017 can be circular. When the biological reaction core device 101 is in use, there is no obstruction above the energy-supplying photovoltaic panel 1017.

[0077] Considering that the suitability of the aeration intensity is crucial for the treatment effect, thus, in one embodiment, the biological reaction core device 101 further includes an environmental monitoring sensor 10110 and a data control and transmission device 10111. As Figure 4-1 and Figure 4-2 shown, the environmental monitoring sensor 10110 is attached to the outer wall of the core tube 1011, the data control and transmission device 10111 is arranged in the control shell 1016, the environmental monitoring sensor 10110 is connected to the data control and transmission device 10111, and the data control and transmission device 10111 is also connected to the power conversion controller 1018.

[0078] Among them, the environmental monitoring sensor 10110 can be used to monitor indicators such as dissolved oxygen, pH, pollutants, etc. In addition, the data control and transmission device 10111 can also be connected to the air pump 1015 to obtain aeration-related data. In specific implementation, a cloud platform terminal can also be set to receive the data transmitted by the data control and transmission device 10111.

[0079] It can be understood that by adopting the above method, by setting the environmental monitoring sensor 10110 and the data control and transmission device 10111, the operating conditions of the biological reaction core device 101 can be monitored and controlled, so that the aeration intensity can be adjusted in real time and adjusted to an appropriate intensity.

[0080] To further improve the treatment effect of the groundwater treatment system 100 on groundwater, in one implementation, the continuous biological reaction zone 103 includes a first row of continuous biological reaction zones 1031 and a second row of continuous biological reaction zones 1032, as Figure 5 shown. The multiple biological reaction core devices 101 include multiple first biological reaction core devices 101-A and multiple second biological reaction core devices 101-B; the adsorption and degradation influence regions corresponding to each first biological reaction core device 101-A constitute the first row of continuous biological reaction zones 1031, and the adsorption and degradation influence regions corresponding to each second biological reaction core device 101-B constitute the second row of continuous biological reaction zones 1032; the first row of continuous biological reaction zones 1031 is located upstream of the second row of continuous biological reaction zones 1032.

[0081] It can be understood that by adopting the above method, along the groundwater flow direction, by arranging two rows of biological reaction core devices 101, the first row is multiple first biological reaction core devices 101-A, and the second row is multiple second biological reaction core devices 101-B, so that the groundwater flowing through the first row of continuous biological reaction zones 1031 can continue to flow into the second row of continuous biological reaction zones 1032 for treatment, thereby improving the treatment effect of groundwater.

[0082] In practical applications, when the pollutant migration flux in groundwater is large, such as greater than 6 g / m 2 ·d, in addition to the first row of continuous biological reaction zones 1031 and the second row of continuous biological reaction zones 1032, the continuous biological reaction zone 103 can also include a third row of continuous biological reaction zones, a fourth row of continuous biological reaction zones... The third row of continuous biological reaction zones, the fourth row of continuous biological reaction zones and other rows of continuous biological reaction zones can be sequentially arranged downstream of the second row of continuous biological reaction zones 1032. The formation methods of the third row of continuous biological reaction zones, the fourth row of continuous biological reaction zones and other rows of continuous biological reaction zones can refer to the first row of continuous biological reaction zones 1031 and the second row of continuous biological reaction zones 1032, which will not be elaborated here.

[0083] Considering that there are fewer pollutants in the groundwater after being treated by the first row of continuous biological reaction zones 1031, a biological reaction core device 101 with a very large treatment capacity may not be required. Thus, in one embodiment, the treatment capacity of the first biological reaction core device 101-A for pollutants is better than that of the second biological reaction core 101-B for pollutants.

[0084] In specific implementation, the first biological reaction core device 101-A can be formed by adding a degradation enhancement device to the biological reaction core device 101, and the degradation enhancement device can enhance the degradation effect of organic pollutants. The second biological reaction core 101-B can be the biological reaction core device 101 mentioned in the foregoing embodiment. Thus, the treatment capacity of the first biological reaction core device 101-A can be better than that of the second biological reaction core 101-B.

[0085] It can be understood that by setting the treatment capacity of the first biological reaction core device 101-A to be better than that of the second biological reaction core 101-B, the treatment effect of groundwater and the input cost of the groundwater treatment system 100 can be taken into account. In practical applications, the enhancement degree of the degradation enhancement device is adjustable, and the relevant parameters of the degradation enhancement device can be adjusted according to the actual degradation requirements, so as to adjust the enhancement degree.

[0086] In one embodiment, as Figure 6-1 and Figure 6-2 shown, the degradation enhancement device can include an optical core 10112, a light source controller 10113, and a photocatalyst. Among them, the optical core 10112 is arranged in the core tube 1011, the light source controller 10113 is arranged in the control shell 1016, the optical core 10112 is connected to the light source controller 10113, and the light source controller 10113 is also connected to the power conversion controller 1018. The photocatalyst is filled in the core tube 1011 and can be mixed with the porous adsorption material in the core tube 1011.

[0087] In the embodiment of the present application, the optical core 10112 can emit visible light, so as to excite the photocatalyst to decompose the refractory organic pollutants. The light source controller 10113 can realize the real-time control of the light emitted by the optical core 10112 and adjust the wavelength of the light emitted by the optical core 10112. The light source controller 10113 can also be connected to the data control transmission device 10111 to obtain the visible light related data.

[0088] In another embodiment, as Figure 7-1 and Figure 7-2As shown, the degradation enhancement device may include an ultrasonic emission module 10114 and an ultrasonic controller 10115. Among them, the ultrasonic emission module 10114 is disposed inside the core tube 1011, the ultrasonic controller 10115 is disposed in the control housing 1016, the ultrasonic emission module 10114 and the ultrasonic controller 10115 are connected, and the ultrasonic controller 10115 is further connected to the power conversion controller 1018.

[0089] In the embodiment of the present application, the ultrasonic emission module 10114 can generate ultrasonic waves. The optical ultrasonic controller 10115 can realize the real-time control of the ultrasonic waves of the ultrasonic emission module 10114 and adjust the intensity and frequency of the ultrasonic waves. The ultrasonic controller 10115 can also be connected to the data control transmission device 10111 to obtain ultrasonic-related data.

[0090] Studies have shown that when ultrasonic waves (generally 20 kHz to 100 kHz) act on a liquid, a "cavitation effect" will occur, that is, the tiny bubble nuclei in the liquid vibrate under the action of ultrasonic waves. When the sound pressure reaches a certain value, the bubbles will rapidly expand and then suddenly close, generating a shock wave when the bubbles close. This series of dynamic processes such as expansion, closure, and oscillation is called the ultrasonic cavitation effect, which will be accompanied by mechanical effects, local thermal effects, and free radical effects. This "cavitation effect" of high-intensity ultrasonic waves can fully break the long chains of macromolecular organic pollutants and heteroatom organic pollutants and transform them into small-molecule organic substances, which can then be used as a carbon source for biodegradation. Low-intensity ultrasonic waves can cause slight damage to cells, and this degree of damage can promote the reversible permeability of cells, enhance the transmission rate of substances inside and outside the cells, and promote the cell synthesis rate. The high-frequency vibration generated by ultrasonic waves will stretch the cell surface layer, thereby enhancing the cell permeability, and at the same time, it also speeds up the rate of organic substrates and metabolites entering and leaving the cells, improving the enzymatic reaction rate, and thus enhancing the degradation of organic pollutants. Therefore, the degradation effect of organic pollutants can be improved based on ultrasonic waves.

[0091] Based on the above research results, the ultrasonic emission module 10114 can be specifically set to include a high-intensity ultrasonic emission module for emitting high-intensity ultrasonic waves and a low-intensity ultrasonic emission module for emitting low-intensity ultrasonic waves. Among them, the high-intensity ultrasonic emission module can be used to break the long chains of macromolecular organic pollutants and heteroatom organic pollutants; the low-intensity ultrasonic emission module can be used to enhance the permeability of microbial cells.

[0092] In yet another embodiment, as Figure 8-1 and Figure 8-2As shown, the degradation enhancement device may include a chemical injection pipe 10116 and a chemical injection pump 10117. The groundwater treatment system 100 may further include a chemical tank (not shown in the figure). Among them, the chemical injection pipe 10116 is disposed within the core pipe 1011, the chemical injection pump 10117 is disposed in the control housing 1016, the chemical injection pipe 10116 and the chemical injection pump 10117 are connected, and the chemical injection pump 10117 is also connected to the power conversion controller 1018. In addition, the chemical tank is disposed above the ground surface, and the chemical injection pump 10117 is connected to the chemical tank to inject the chemical into the core pipe 1011.

[0093] In an embodiment of the present application, the chemical injection pipe 10116 may inject trace elements, nutrient salts, and pH regulators into the core pipe 1011, thereby providing nutrients and a pH environment suitable for degradation for microorganisms. The chemical injection pump 10117 may also be connected to the data control transmission device 10111 to obtain chemical injection-related data.

[0094] In another embodiment, the degradation enhancement device may include an electric field generation device and an electric field controller (not shown in the figure). Among them, the electric field generation device is disposed within the core pipe 1011, the electric field controller is disposed in the control housing 1016, the electric field generation device and the electric field controller are connected, and the electric field controller is also connected to the power conversion controller 1018.

[0095] In an embodiment of the present application, the electric field generation device may generate an electric field to capture pollutants. The electric field controller may achieve real-time control of the electric field generation device and adjust the intensity of the electric field. The electric field controller may also be connected to the data control transmission device 10111 to obtain electric field-related data.

[0096] In practical applications, in order to further reduce the input cost of the groundwater treatment system 100, in one embodiment, the adsorption and degradation influence regions 102 corresponding to any two adjacent first biological reaction core devices 101-A are tangent to each other, and the adsorption and degradation influence regions 102 corresponding to any adjacent first biological reaction core device 101-A and second biological reaction core device 101-B are tangent to each other.

[0097] It can be understood that by adopting the above solution, by setting the adsorption and degradation influence regions 102 to be tangent to each other, the number of biological reaction core devices 101 in the groundwater treatment system 100 can be reduced, thereby reducing the input cost of the groundwater treatment system 100.

[0098] In order to balance the input cost of the groundwater treatment system 100 and the groundwater treatment effect, in a further embodiment, any second biological reaction core device 101-B is located on the perpendicular bisector of the line connecting two adjacent first biological reaction core devices 101-A.

[0099] As Figure 5 shown, the radii of the influence regions corresponding to the respective first biological reaction core devices 101-A in the first row of continuous biological reaction zones 1031 are similar or the same. In the first row of continuous biological reaction zones 1031, the influence regions corresponding to the respective first biological reaction core devices 101-A are tangent to each other in sequence. Any second biological reaction core device 101-B in the second row of continuous biological reaction zones 1032 is located on the perpendicular bisector of the line connecting two adjacent first biological reaction core devices 101-A, and the influence region of this second biological reaction core device 101-B is tangent to the influence regions corresponding to the two adjacent first biological reaction core devices 101-A.

[0100] It can be understood that with the above solution, the influence region corresponding to the second biological reaction core device 101-B can be located downstream of the tangency position of the influence regions of the first row of continuous biological reaction zones 1031, so that the groundwater that has passed through the tangency position of the influence regions of the first row of continuous biological reaction zones 1031 and has not been well treated can enter the influence region corresponding to the second biological reaction core device 101-B for treatment again. Thus, the input cost of the groundwater treatment system 100 and the groundwater treatment effect can be taken into account.

[0101] In practical applications, when there is a third row of continuous biological reaction zones, the treatment capacity of the biological reaction core devices in the third row of continuous biological reaction zones can be weaker than that of the second biological reaction cores 101-B in the second row of continuous biological reaction zones 1032. Any biological reaction core device in the third row of continuous biological reaction zones can be located on the perpendicular bisector of the line connecting two adjacent second biological reaction cores 101-B, and the influence region of the biological reaction core device is tangent to the influence regions corresponding to the two adjacent second biological reaction cores 101-B. When there are more rows of continuous biological reaction zones, the setting positions of the biological reaction core devices therein can refer to the above content and will not be elaborated here.

[0102] To further monitor the treatment effect of groundwater, in one embodiment, the groundwater treatment system 100 further includes a plurality of first monitoring wells 104 and a plurality of second monitoring wells 105, as Figure 1 shown. Among them, a plurality of first monitoring wells 104 are arranged upstream of the continuous biological reaction zone 103, and a plurality of second monitoring wells 105 are arranged downstream of the continuous biological reaction zone 103.

[0103] In the embodiments of the present application, the first monitoring well 104 can be used to monitor the concentration of pollutants in the groundwater about to enter the continuous biological reaction zone 103, and the second monitoring well 105 can be used to monitor the concentration of pollutants in the groundwater after being treated by the continuous biological reaction zone 103. Thus, based on the comparison of the pollutant concentrations, the treatment effect of the groundwater can be monitored; the monitoring frequency can be 7 to 10 days / time.

[0104] In specific implementation, the number of the first monitoring wells 104 can be 2 to 5, and the distance between the first monitoring wells 104 and the continuous biological reaction zone 103 can be 1 to 3 m. The number of the second monitoring wells 105 can be 2 to 5, and the distance between the second monitoring wells 105 and the continuous biological reaction zone 103 can be 1 to 3 m.

[0105] In the groundwater treatment system 100 provided in the above embodiments of the present application, the biological reaction core device 101 has an explosion-proof structure, and the cables and pipelines can be connected through explosion-proof joints, thereby further improving the safety of application in the petrochemical enterprise plot.

[0106] Based on the groundwater treatment system 100 provided in the above embodiments of the present application, the embodiments of the present application further provide a method for building a groundwater treatment system, which can be used to build the groundwater treatment system provided in the above embodiments of the present application. As Figure 9 shown, the building method can include the following steps:

[0107] Step 201, construct a three-dimensional spatial distribution model of soil pollution in the target area, and determine the facility layout of the target area.

[0108] Among them, the target area can be an in-production petrochemical enterprise plot.

[0109] In the embodiments of the present application, a three-dimensional spatial distribution model of soil pollution can be constructed based on the soil sampling depth information and the pollution data of various soil pollutants in the target area.

[0110] In specific implementation, a three-dimensional spatial distribution model of soil pollution can be constructed by means of the three-dimensional Kriging interpolation method (Kriging), the inverse distance weighted interpolation method (IDW), the nearest neighbor method (NearestNeighbor), etc., through software such as ArcGIS, GMS, and EVS.

[0111] In the embodiments of the present application, the facility layout may include, but is not limited to, the layout of facilities such as large tanks, reaction towers, pipe galleries, underground pipelines, utilities, offices, and workshops.

[0112] Step 202, determine the position information of the continuous biological reaction zone according to the three-dimensional spatial distribution model of soil pollution and the facility layout, and establish the continuous biological reaction zone based on the position information.

[0113] Among them, the connection formed by successively connecting each biological reaction core device in the first row of continuous biological reaction zones can be a curve, a broken line, etc.

[0114] In the embodiment of the present application, based on the three-dimensional spatial distribution model of soil pollution and the facility layout, the position information of the continuous biological reaction zone is determined, so that the continuous biological reaction zone can be set as far as possible to avoid facilities.

[0115] It can be understood that by using the method for building a groundwater treatment system provided in the embodiment of the present application, since the position of the continuous biological reaction zone is determined based on the three-dimensional spatial distribution model of soil pollution and the facility layout, the continuous biological reaction zone can be safely arranged, thereby improving safety.

[0116] In practical applications, after constructing the three-dimensional spatial distribution model of soil pollution in the target area and determining the facility layout of the target area in step 201, before determining the position of the continuous biological reaction zone according to the three-dimensional spatial distribution model of soil pollution and the facility layout in step 203, the method for building a groundwater treatment system provided in the embodiment of the present application further includes: constructing a groundwater pollutant movement and migration model corresponding to the three-dimensional spatial distribution model of soil pollution, and constructing a three-dimensional solid model diagram corresponding to the facility layout. Then, step 203 determines the position information of the continuous biological reaction zone according to the three-dimensional spatial distribution model of soil pollution and the facility layout, including: determining the position information of the continuous biological reaction zone based on the groundwater pollutant movement and migration model and the three-dimensional solid model diagram.

[0117] Among them, the groundwater pollutant movement and migration model can reflect the distribution of groundwater pollution plumes. Determining the position of the continuous biological reaction zone based on the distribution of groundwater pollution plumes can effectively intercept groundwater pollutants. The setting position of the continuous biological reaction zone can be as Figure 10 shown.

[0118] The establishment process of the groundwater pollutant movement and migration model can include: on the basis of the three-dimensional spatial distribution model of soil pollution, using the MODFLOW module to assign values and calculate and solve the geometric dimensions, source and sink terms, boundary conditions, and hydraulic parameters of the target area, and generalizing the groundwater flow field of the target area into a three-dimensional steady flow model of multi-layered heterogeneous anisotropy; and using the solute transport module (MT3DMS) to predict the migration and diffusion path of pollutants, obtain the dominant channels and migration fluxes of groundwater pollutant migration, and then obtain the groundwater pollutant movement and migration model.

[0119] When constructing the three-dimensional solid model diagram corresponding to the facility layout, software such as Solidwork, CAD, or software with a solid module can be used for construction. In specific implementation, the explosion-proof area and the corresponding explosion-proof level of the explosion-proof area can also be marked in the three-dimensional solid model diagram.

[0120] In the embodiment of the present application, based on the groundwater pollutant movement and migration model and the three-dimensional solid model diagram, the position information of the continuous biological reaction zone can be determined. It can be to overlay the layer corresponding to the groundwater pollutant movement and migration model and the layer corresponding to the three-dimensional solid model diagram (the effect after overlay can be as Figure 10 shown) to determine the position information of the continuous biological reaction zone.

[0121] Furthermore, the position information of the continuous biological reaction zone can include the specific installation positions of each biological reaction core device. Therefore, when determining the position information of the continuous biological reaction zone, the treatment capacity of the biological reaction core device and the corresponding influence area can also be combined to determine the position information of the continuous biological reaction zone. Then, in one implementation manner, the determining the position information of the continuous biological reaction zone based on the groundwater pollutant movement and migration model and the three-dimensional solid model diagram includes: determining the installation positions of the biological reaction core devices based on the groundwater pollutant movement and migration model, the three-dimensional solid model diagram, and the adsorption and degradation influence area corresponding to the biological reaction core device.

[0122] Among them, determining the installation positions of the biological reaction core devices based on the adsorption and degradation influence area corresponding to the biological reaction core device can specifically be determining the installation positions of the biological reaction core devices based on the size of the adsorption and degradation influence area corresponding to the biological reaction core device.

[0123] In the embodiment of the present application, when determining the specific installation positions of each biological reaction core device, the position of the explosion-proof area and the corresponding explosion-proof level of the explosion-proof area can also be combined to determine the specific installation positions of each biological reaction core device. Thus, it is possible to avoid installing biological reaction core devices in explosion-proof areas with a higher explosion-proof level, thereby further improving safety.

[0124] For example, in practical applications, the explosion-proof area can include Zone 0, Zone 1, and Zone 2, where the explosion-proof levels of Zone 0, Zone 1, and Zone 2 decrease in sequence. Then, the rules for determining the specific installation positions of the biological reaction core devices can include: biological reaction core devices cannot be installed in explosion-proof Zone 0, and it is determined whether biological reaction core devices can be installed in explosion-proof Zone 1 according to further safety assessment conditions, and biological reaction core devices can be installed in explosion-proof Zone 2 and areas outside.

[0125] To facilitate the description of the effects of the groundwater treatment system and its construction method provided in the embodiments of the present application, the following will be elaborated in conjunction with specific embodiments.

[0126] Embodiment 1

[0127] In this embodiment, the pollution plume is located in the site of an operating refinery and petrochemical enterprise. The pollutants exceeding the standard are petroleum hydrocarbons and fluoranthene. The area of the pollution plume is approximately 317 m², the pollution depth is 3 - 8 m, the groundwater depth is 5 - 6 m, and the first impermeable floor is at 10 - 12 m.

[0128] Through the construction method provided above, the layout plan of the groundwater treatment system is as follows: Avoiding the core area of the production device and the operation workshop, and combining with the layout diagram of the underground oil pipeline network, a total of 19 biological reaction core devices are arranged on the green belt and road in the explosion-proof zone 2 downstream of the pollution plume. The continuous biological reaction zone has two rows. Each biological reaction core device in the first row of the continuous biological reaction zone is equipped with a degradation enhancement device with photocatalytic enhancement for enhancing the degradation and removal of fluoranthene. The second row of the continuous biological reaction zone uses ordinary biological reaction core devices (i.e., without a degradation enhancement device). A total of 10 biological reaction core devices are arranged in the first row of the continuous biological reaction zone. The influence areas of each biological reaction core device are tangent to each other. Each influence area is cylindrical and presents a figure-eight distribution, with an influence radius of 1 m. A total of 9 biological reaction core devices are arranged in the second row of the continuous biological reaction zone, which is downstream of the biological reaction core devices in the first row. Any one biological reaction core device is arranged on the perpendicular bisector of the connection line between two adjacent biological reaction core devices in the first row and is tangent to the two adjacent biological reaction core devices. Each influence area is cylindrical, with an influence radius of 1.5 m. The two rows of biological reaction core devices form an arc-shaped reaction zone, with a total length of approximately 20 m and a width of approximately 5 m, surrounding the boundary of the pollution plume. 4 monitoring wells are evenly arranged 1 m upstream of the reaction zone, and 4 monitoring wells are evenly arranged 1 m downstream. The installation depth of each biological reaction core device is such that the upper end is 4.5 m from the ground surface, and the lower end inserts 0.3 m into the first impermeable floor.

[0129] During the stable operation period, through monitoring, the total petroleum hydrocarbon concentration in the groundwater of the monitoring wells upstream of the reaction zone is 5 - 12 mg / L, the total petroleum hydrocarbon concentration in the monitoring wells downstream is 0.2 - 0.8 mg / L, the fluoranthene concentration in the groundwater of the monitoring wells upstream is 100 μg / L - 150 μg / L, and the fluoranthene concentration in the monitoring wells downstream is less than 50 μg / L.

[0130] Embodiment 2

[0131] In this embodiment, the pollution plume is located below a large tank farm. The pollutants exceeding the standard are benzene and toluene. The area of the pollution plume is approximately 420 m², the pollution depth is 3 - 6 m, and the groundwater depth is 2 - 3 m.

[0132] Through the construction method provided above, the layout plan of the groundwater treatment system is as follows: Avoiding the core area of the tank farm and combining with the layout map of the underground oil pipeline network, a total of 11 biological reaction core devices are arranged on the green belt and roads downstream of the pollution plume. The continuous biological reaction zone has two rows. The first row of the continuous biological reaction zone is arranged with a total of 6 biological reaction core devices. The influence areas of each biological reaction core device are tangent to each other, showing a broken line distribution. Each influence area is cylindrical with an influence radius of 2m. The second row of the continuous biological reaction zone is arranged with a total of 5 biological reaction core devices, which are downstream of the first row of biological reaction core devices. Any one biological reaction core device is arranged on the perpendicular bisector of the connection line between two adjacent biological reaction core devices in the first row and is tangent to the two adjacent biological reaction core devices. Each influence area is cylindrical with an influence radius of 2m. The two rows of biological reaction core devices form an arc-shaped reaction zone with a total length of about 24m and a width of about 8m, surrounding the boundary of the pollution plume. 3 monitoring wells are evenly arranged 1m upstream of the reaction zone, and 5 monitoring wells are evenly arranged 1m downstream of the reaction zone. The installation depth of each biological reaction core device is 1.8m from the upper end to the ground surface and 6.4m from the lower end to the ground surface.

[0133] During the stable operation period, through monitoring, the benzene concentration in the groundwater of the monitoring wells upstream of the reaction zone is 30 - 50 μg / L, the benzene concentration in the monitoring wells downstream is 3 - 8 μg / L, the toluene concentration in the groundwater of the monitoring wells upstream is 6 - 11 mg / L, and the toluene concentration in the monitoring wells downstream is 0.5 - 0.7 mg / L.

[0134] Example 3

[0135] In this example, the pollution plume is located in the oil depot site of a waterfront enterprise. The pollutants exceeding the standard are petroleum hydrocarbons and methyl tert-butyl ether. The area of the pollution plume is about 810 ㎡, the pollution depth is 2 - 8m, and the groundwater depth is 1.5 - 2m.

[0136] Through the above-provided construction method, the layout plan of the groundwater treatment system is as follows: Avoiding the core area of the tank farm and the refined oil loading and unloading platform, and combining with the layout map of the underground oil pipeline network, a total of 15 biological reaction core devices are arranged on the green belt and the road downstream of the pollution plume. The continuous biological reaction zone has two rows. The first row of the continuous biological reaction zone is arranged with a total of 8 biological reaction core devices. The influence areas of each biological reaction core device are tangent to each other, showing a figure-eight distribution. Each influence area is cylindrical, and the influence radius is 2.5 m. The second row of the continuous biological reaction zone is arranged with a total of 7 biological reaction core devices, which is downstream of the biological reaction core devices in the first row. Any one biological reaction core device is arranged on the perpendicular bisector of the connection line between two adjacent biological reaction core devices in the first row, tangent to the two adjacent biological reaction core devices. Each influence area is cylindrical, and the influence radius is 2.5 m. The two rows of biological reaction core devices form an arc-shaped reaction zone, with a total length of about 40 m and a width of about 10 m, surrounding the boundary of the pollution plume. Three monitoring wells are evenly arranged 1 m upstream of the reaction zone, and three monitoring wells are evenly arranged 1 m downstream. The installation depth of each biological reaction core device is 1.6 m from the ground surface at the upper end and 8.5 m from the ground surface at the lower end.

[0137] During the stable operation period, through monitoring, the concentration of petroleum hydrocarbons in the groundwater in the monitoring wells upstream of the reaction zone is 9 - 11 mg / L, and the concentration of petroleum hydrocarbons in the monitoring wells downstream is 0.2 - 0.5 mg / L. The concentration of methyl tert-butyl ether in the groundwater in the upstream monitoring wells is 60 - 80 μg / L, and the concentration of methyl tert-butyl ether in the downstream monitoring wells is 5 - 12 μg / L.

[0138] Example 4

[0139] In this example, the pollution plume is located in a polluted area of a petrochemical production device area in production. The main pollution source is the point source leakage of petrochemical product pipelines. The exceeding-standard pollutants are petroleum hydrocarbons and benzo[a]pyrene. The area of the pollution plume is about 260 ㎡, the pollution depth is 1.5 - 5 m, the groundwater depth is 3 - 4 m, and the first aquitard is the silty clay layer at 7 - 8 m.

[0140] The groundwater flow in the contaminated plot is from the northwest to the southeast, and the flow field is relatively uniform without dominant channels. Through the construction method provided above, the layout plan of the groundwater treatment system is as follows: Avoiding the core area of the production device and the operation workshop, and combining with the layout map of the underground oil pipeline network, a total of 13 biological reaction core devices are arranged on the green belt and roads in the explosion-proof zone 2 downstream of the pollution plume. The continuous biological reaction zone has two rows. Each biological reaction core device in the first row of the continuous biological reaction zone is equipped with a degradation enhancement device with ultrasonic cavitation enhancement for strengthening the degradation and removal of benzo[a]pyrene. The second row of the continuous biological reaction zone adopts ordinary biological reaction core devices (i.e., without degradation enhancement devices). A total of 7 biological reaction core devices are arranged in the first row of the continuous biological reaction zone, and the influence areas of each biological reaction core device are tangent to each other, distributed in an arc tangent. Each influence area is cylindrical with an influence radius of 1.5 m. A total of 6 biological reaction core devices are arranged in the second row of the continuous biological reaction zone, which is downstream of the biological reaction core devices in the first row. Any one biological reaction core device is arranged on the perpendicular bisector of the connection line between two adjacent biological reaction core devices in the first row and is tangent to the two adjacent biological reaction core devices. Each influence area is cylindrical with an influence radius of 2 m. The two rows of biological reaction core devices form an arc-shaped reaction zone with a total length of about 20 m and a width of about 7 m, surrounding the boundary of the pollution plume. Two monitoring wells are evenly arranged 1 m upstream of the reaction zone, and three monitoring wells are evenly arranged 1 m downstream; the installation depth of the biological reaction core device is 2.5 m from the upper end to the ground surface and 0.3 m from the lower end inserted into the first impervious floor.

[0141] During the stable operation period, through monitoring, the total petroleum hydrocarbon concentration in the groundwater of the monitoring wells upstream of the reaction zone is 8 - 13 mg / L, the total petroleum hydrocarbon concentration in the monitoring wells downstream is 0.4 - 0.7 mg / L, the benzo[a]pyrene concentration in the groundwater of the monitoring wells upstream is 0.2 - 0.3 μg / L, and the benzo[a]pyrene concentration in the monitoring wells downstream is below 0.01 μg / L.

[0142] Example 5

[0143] In this example, the pollution plume is in the contaminated plot of the buried tank of the operating gas station. The main pollution sources are gasoline and diesel, and the exceeded pollutants are petroleum hydrocarbons. The area of the pollution plume is about 150 ㎡, the pollution depth is 2 - 6 m, and the groundwater depth is 2 - 3 m.

[0144] The groundwater flow in the contaminated plot is from the northwest to the southeast, the flow field is relatively uniform, and there is no preferential channel. Through the construction method provided above, the layout plan of the groundwater treatment system is obtained as follows: avoiding the core area of the tank farm and the fuel dispenser area, and combining with the layout map of the underground oil pipelines, a total of 7 biological reaction core devices are arranged downstream of the pollution plume, and the continuous biological reaction zone has two rows. Since petroleum hydrocarbons can be degraded by microorganisms, the biological reaction core devices adopted are all ordinary biological reaction core devices (i.e., without degradation enhancement devices). The first row of the continuous biological reaction zone is arranged with a total of 4 biological reaction core devices, and the influence areas of each biological reaction core device are tangent to each other, and are distributed in an arc tangent. Each influence area is cylindrical, and the influence radius is 2m. The second row of the continuous biological reaction zone is arranged with a total of 3 biological reaction core devices, which are downstream of the biological reaction core devices in the first row. Any one of the biological reaction core devices is arranged on the perpendicular bisector of the connection line between two adjacent biological reaction core devices in the first row, and is tangent to the two adjacent biological reaction core devices. Each influence area is cylindrical, and the influence radius is 2m. The two rows of biological reaction core devices form an arc-shaped reaction zone, with a total length of about 15m and a width of about 8m, surrounding the boundary of the pollution plume. 2 monitoring wells are evenly arranged 1m upstream of the reaction zone, and 2 monitoring wells are evenly arranged 1m downstream. The installation depth of each biological reaction core device is that the upper end is 1.6m away from the ground surface and the lower end is 8.5m away from the ground surface.

[0145] During the stable operation period, through monitoring, the total petroleum hydrocarbon concentration in the groundwater of the monitoring wells upstream of the reaction zone is 3 - 6mg / L, and the total petroleum hydrocarbon concentration in the monitoring wells downstream is 0.2 - 0.6mg / L.

[0146] Example 6

[0147] In this example, the pollution plume is located in a petrochemical solid waste landfill, and the main pollutants are styrene, naphthalene, and dinitrotoluene. The area of the heavy pollution plume is about 390㎡, and the pollution exceeding standard concentration is relatively large, 3 - 5 times. Through establishing the groundwater flow field to predict the pollution migration and diffusion path, this contaminated plot has a clear preferential diffusion channel, with a width of about 13m, a depth of 2 - 7m, a groundwater depth of 2 - 3m, and an impermeable bedrock below 7m.

[0148] Through the above-provided construction method, the layout plan of the groundwater treatment system is as follows: A total of 12 biological reaction core devices are arranged in the dominant diffusion channel of the pollution plume, and the continuous biological reaction zone has three rows. Each biological reaction core device in the first row of the continuous biological reaction zone and each biological reaction core device in the second row of the continuous biological reaction zone are both equipped with a degradation enhancement device with photocatalytic enhancement for enhancing the degradation and removal of naphthalene and dinitrotoluene. The third row uses ordinary biological reaction core devices (i.e., without a degradation enhancement device). A total of 4 biological reaction core devices are arranged in the first row of the continuous biological reaction zone. The influence areas of each biological reaction core device are tangent to each other, showing a linear distribution. Each influence area is cylindrical, and the influence radius is 1.5 m. A total of 3 biological reaction core devices are arranged in the second row of the continuous biological reaction zone, which is downstream of the biological reaction core devices in the first row. Any one biological reaction core device is arranged on the perpendicular bisector of the connection line between two adjacent biological reaction core devices in the first row and is tangent to the two adjacent biological reaction core devices. Each influence area is cylindrical, and the influence radius is 1.5 m. A total of 5 biological reaction core devices are arranged in the third row of the continuous biological reaction zone, which is downstream of the biological reaction core devices in the second row. Any one biological reaction core device is arranged on the perpendicular bisector of the connection line between two adjacent biological reaction core devices in the second row and is tangent to the two adjacent biological reaction core devices. Each influence area is cylindrical, and the influence radius is 1.5 m. Additionally, 2 biological reaction core devices are added at both ends of the third row. The three rows of biological reaction core devices form a linear reaction zone with a total length of approximately 15 m and a width of approximately 9 m, intercepting and removing pollutants in the dominant diffusion channel. Two monitoring wells are evenly arranged 1 m upstream of the reaction zone, and two monitoring wells are evenly arranged 1 m downstream; the installation depth of the biological reaction core devices is such that the upper end is 1.5 m from the ground surface and the lower end is 7 m from the ground surface.

[0149] During the stable operation period, through monitoring, the concentrations of styrene, naphthalene, and dinitrotoluene pollutants in the downstream monitoring wells are all lower than the Class III groundwater quality standard values, and no other substances exceed the standard.

[0150] Based on the treatment results of each embodiment, it can be seen that the groundwater treatment system provided by the embodiments of the present application has a good treatment effect on the pollutants in the groundwater.

[0151] It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or elements inherent to such process, method, commodity or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, commodity or device including the element.

[0152] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various modifications and changes can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A groundwater treatment system, characterized in that, The processing system includes a plurality of biological reaction core devices, and the plurality of biological reaction core devices are arranged below the ground surface; Among the plurality of biological reaction core devices, any two biological reaction core devices are arranged at intervals from each other; Each biological reaction core device is filled with a porous core material loaded with microorganisms. Each biological reaction core device adsorbs and degrades surrounding pollutants, and micro-nano bubbles and microorganisms in each biological reaction core device diffuse outward to form respective corresponding adsorption and degradation influence regions around each biological reaction core device; The adsorption and degradation influence regions corresponding to each biological reaction core device constitute a continuous biological reaction zone, and groundwater flows through the continuous biological reaction zone.

2. The groundwater treatment system according to claim 1, characterized in that, The continuous biological reaction zone includes a first row of continuous biological reaction zones and a second row of continuous biological reaction zones, and the plurality of biological reaction core devices include a plurality of first biological reaction core devices and a plurality of second biological reaction core devices; The adsorption and degradation influence regions corresponding to each first biological reaction core device constitute the first row of continuous biological reaction zones, and the adsorption and degradation influence regions corresponding to each second biological reaction core device constitute the second row of continuous biological reaction zones; The first row of continuous biological reaction zones is located upstream of the second row of continuous biological reaction zones.

3. The groundwater treatment system according to claim 2, wherein The treatment capacity of the first biological reaction core device for pollutants is superior to that of the second biological reaction core for pollutants.

4. The groundwater treatment system according to claim 2, characterized in that, The adsorption and degradation influence regions corresponding to any two adjacent first biological reaction core devices are tangent to each other, and the adsorption and degradation influence regions corresponding to any adjacent first biological reaction core device and second biological reaction core device are tangent to each other.

5. The groundwater treatment system according to claim 4, wherein Any second biological reaction core device is located on the perpendicular bisector of the line connecting two adjacent first biological reaction core devices.

6. The groundwater treatment system according to claim 3, wherein, The biological reaction core device includes a core body tube, an outer screen tube, an aeration disc, an aeration pipeline, an air pump, a control shell, an energy supply photovoltaic panel, a power conversion controller, a lithium battery, an environmental monitoring sensor, and a data control and transmission device; Wherein, the outer screen tube is sleeved outside the core body tube; The control shell is located at the upper end of the outer screen tube; the aeration disc is located inside the core body tube and at the bottom of the core body tube; the air pump is arranged in the control shell, the aeration pipeline is attached to the outer wall of the core body tube, and the air pump is connected to the aeration disc through the aeration pipeline; The energy supply photovoltaic panel is arranged on the top of the control shell, and the power conversion controller and the lithium battery are arranged in the control shell; The environmental monitoring sensor is attached to the outer wall of the core body tube, the data control and transmission device is arranged in the control shell, and the environmental monitoring sensor is connected to the data control and transmission device; The power conversion controller is respectively connected to the energy supply photovoltaic panel, the lithium battery, the air pump, and the data control and transmission device.

7. The groundwater treatment system according to claim 6, characterized in that, The first biological reaction core device further includes a degradation enhancement device, and the degradation enhancement device is used to enhance the degradation effect of pollutants.

8. The groundwater treatment system according to claim 7, characterized in that, The degradation enhancement device includes an optical core, a light source controller, and a photocatalyst; The optical core is disposed inside the core tube, the light source controller is disposed inside the control housing, the optical core is connected to the light source controller, the light source controller is further connected to the power conversion controller, and the photocatalyst is filled inside the core tube.

9. The groundwater treatment system according to claim 7, wherein The degradation enhancement device includes an ultrasonic emission module and an ultrasonic controller; The ultrasonic emission module is disposed inside the core tube, the ultrasonic controller is disposed inside the control housing, the ultrasonic emission module is connected to the ultrasonic controller, and the ultrasonic controller is further connected to the power conversion controller.

10. The groundwater treatment system according to claim 7, characterized in that, The degradation enhancement device includes a chemical injection pipe and a chemical injection pump, and the treatment system further includes a chemical tank; The chemical tank is disposed above the ground surface, the chemical injection pipe is disposed inside the core tube, the chemical injection pump is disposed inside the control housing, the chemical injection pipe is connected to the chemical injection pump, and the chemical injection pump is further connected to the power conversion controller.

11. The groundwater treatment system according to claim 7, characterized in that, The degradation enhancement device includes an electric field generation device and an electric field controller; The electric field generation device is disposed inside the core tube, the electric field controller is disposed inside the control housing, the electric field generation device is connected to the electric field controller, and the electric field controller is further connected to the power conversion controller.

12. The groundwater treatment system according to claim 1, wherein, The treatment system further includes a plurality of first monitoring wells and a plurality of second monitoring wells; The plurality of first monitoring wells are disposed upstream of the continuous bioreaction zone, and the plurality of second monitoring wells are disposed downstream of the continuous bioreaction zone.

13. A method for building a groundwater treatment system, characterized in that, The construction method is used to construct the groundwater treatment system according to any one of claims 1-12, and the construction method includes: Constructing a three-dimensional spatial distribution model of soil pollution in the target area and determining the facility layout in the target area; According to the three-dimensional spatial distribution model of soil pollution and the facility layout, determining the position information of the continuous bioreaction zone, and based on the position information, establishing the continuous bioreaction zone.

14. The method for building a groundwater treatment system according to claim 13, wherein, After constructing the three-dimensional spatial distribution model of soil pollution in the target area and determining the facility layout in the target area, and before determining the position information of the continuous bioreaction zone according to the three-dimensional spatial distribution model of soil pollution and the facility layout, the construction method further includes: Constructing a groundwater pollutant movement and migration model corresponding to the three-dimensional spatial distribution model of soil pollution and constructing a three-dimensional solid model diagram corresponding to the facility layout; The determining the position information of the continuous bioreaction zone according to the three-dimensional spatial distribution model of soil pollution and the facility layout includes: Based on the groundwater pollutant movement and migration model and the three-dimensional solid model diagram, determining the position information of the continuous bioreaction zone.

15. The method for building a groundwater treatment system according to claim 14, characterized in that, The determining the position information of the continuous bioreaction zone based on the groundwater pollutant movement and migration model and the three-dimensional solid model diagram includes: Based on the groundwater pollutant movement and migration model, the three-dimensional solid model diagram, and the adsorption and degradation influence area corresponding to the bioreaction core device, determining the installation position of the bioreaction core device.

Images