阅读说明：本技术 污染场地风险管控协同修复系统 (Contaminated site risk management and control cooperative repair system ) 是由 侯德义 宋易南 王刘炜 于 2021-07-22 设计创作，主要内容包括：本发明公开了一种污染场地风险管控协同修复系统,包括地面控制系统布气系统、布液系统、地下填充单元,布气系统和布液系统分别从地面延伸至待修复的地下水中；地下填充单元包括蒸汽入侵阻隔层、导水层和生物填料,蒸汽入侵阻隔层设置在地下水位以上,导水层形成上表面开口的中空槽状结构,中空槽状结构的上表面与蒸汽入侵阻隔层抵接,中空槽状结构内部具有生物填料；地面控制系统包括太阳能电池板储能模块、具有热对流结构的隔热外壳、鼓风机、蠕动泵和药剂罐,太阳能储能模块与隔热外壳的内部连接,用于为隔热外壳内部空间提供热量,鼓风机设置在隔热外壳的内部空间并且鼓风机的出风口与布气系统连接,药剂罐通过蠕动泵与布液系统连接。(The invention discloses a pollution site risk management and control cooperative repair system which comprises a ground control system gas distribution system, a liquid distribution system and an underground filling unit, wherein the gas distribution system and the liquid distribution system respectively extend from the ground to underground water to be repaired; the underground filling unit comprises a steam invasion blocking layer, a water guide layer and biological filler, wherein the steam invasion blocking layer is arranged above the underground water level, the water guide layer forms a hollow groove-shaped structure with an opening on the upper surface, the upper surface of the hollow groove-shaped structure is abutted against the steam invasion blocking layer, and the biological filler is arranged in the hollow groove-shaped structure; the ground control system comprises a solar cell panel energy storage module, a heat insulation shell with a heat convection structure, an air blower, a peristaltic pump and a medicament tank, wherein the solar cell panel energy storage module is connected with the heat insulation shell in the heat insulation shell and used for providing heat for the inner space of the heat insulation shell, the air blower is arranged in the inner space of the heat insulation shell and an air outlet of the air blower is connected with a gas distribution system, and the medicament tank is connected with a liquid distribution system through the peristaltic pump.)

1. The pollution site risk management and control cooperative repair system is characterized by comprising a ground control system, a gas distribution system, a liquid distribution system and an underground filling unit, wherein the ground control system is arranged above the ground, and the gas distribution system and the liquid distribution system respectively extend into underground water to be repaired from the ground;

the underground filling unit comprises a steam invasion blocking layer, a water guide layer and biological filler, wherein the steam invasion blocking layer is arranged above an underground water level, the water guide layer forms a hollow groove-shaped structure with an opening on the upper surface, the upper surface of the hollow groove-shaped structure is abutted to the steam invasion blocking layer, a reaction area is formed inside the hollow groove-shaped structure, and the reaction area is provided with the biological filler;

ground control system includes solar cell panel energy storage module, has thermal-insulated shell, air-blower and medicament jar of thermal convection structure, solar energy storage module with the internal connection of thermal-insulated shell is used for doing the thermal-insulated shell inner space provides the heat, the air-blower sets up the inner space of thermal-insulated shell and the air outlet of air-blower with the gas distribution headtotail, the medicament jar with the liquid distribution headtotail.

2. The pollution site risk management and control cooperative repair system according to claim 1, wherein the solar energy storage module comprises a photovoltaic panel, a heat transfer pipeline and a thermoelectric converter, the photovoltaic panel is arranged on the top of the heat insulation shell, and the interior of the heat insulation shell is connected with the photovoltaic panel through the heat transfer pipeline.

3. The system for managing, managing and repairing risks of polluted sites according to claim 2, wherein one end of the thermoelectric converter is connected with the photovoltaic panel, the other end of the thermoelectric converter is connected with the air blower, and the thermoelectric converter converts part of heat energy of the photovoltaic panel into electric energy to supply power to the air blower.

4. The pollution site risk management and control cooperative repair system according to claim 1, wherein a first convection hole is formed in the bottom of the heat insulation shell, and a second convection hole is formed in the top of the heat insulation shell.

5. The pollution site risk management and control cooperative repair system according to claim 4, wherein the first convection hole is multiple and forms a first array; the second convection holes are multiple and form a second array; each first convection hole of the first array is opposite to or staggered with each second convection hole of the second array.

6. The pollution site risk management and control cooperative repair system according to claim 1, wherein the gas distribution system has a plurality of gas outlets, the liquid distribution system has a plurality of liquid outlets, the gas outlets of the gas distribution system are intensively distributed on one side of the reaction zone, and the liquid outlets of the liquid distribution system are intensively distributed on the opposite side of the reaction zone.

7. The pollution site risk management and control cooperative repair system according to claim 6, wherein a gas outlet direction of the gas distribution system is the same as a liquid outlet direction of the liquid distribution system.

8. The polluted site risk management and control cooperative repair system according to any one of claims 1 to 7, wherein the biological filler is a uniform mixture of porous media and ore particles.

9. The polluted site risk management and control cooperative repair system according to any one of claims 1 to 7, wherein the material of the heat insulation shell is selected from any one or more of glass wool, rock wool heat preservation felt and aluminum silicate.

10. The polluted site risk management and control cooperative repair system according to any one of claims 1 to 7, wherein the material of the steam intrusion barrier layer is natural clay; and/or the material of the water guide layer is selected from one or more of gravel, sandy soil, silt and silt.

Technical Field

The invention relates to the technical field of environmental pollution remediation, in particular to a pollution site risk management and control cooperative remediation system.

Background

In recent years, with the rapid development of society and economy, groundwater pollution is becoming more serious, wherein organic matters are particularly polluted and have relatively great harmfulness. Organic pollutants in groundwater can cause numerous hazards, including inhibition of animals, plants, and microorganisms in soil ecosystems, hazards to human health, and the like. When a human body directly contacts or drinks polluted groundwater, adverse reactions of sense and physiological functions can be caused, the resistance of the body is reduced, the morbidity and mortality of chronic diseases are increased, and some organic matters can destroy the balance of the endocrine system of the human body. Therefore, there is a need to improve the groundwater remediation technology, particularly remediation of groundwater contaminated with organic matters, to maintain the sustainable development of agriculture and industry and to improve the ecosystem through which humans live.

The pollution underground water treatment mode is divided into two types of restoration and risk management and control. Common underground water restoration technologies comprise pumping treatment, in-situ chemical oxidation, in-situ thermal desorption and the like, and aim to remove pollution in underground water. For example, in-situ thermal desorption requires a large amount of energy consumption, the operation cost is high, and the improper treatment of tail gas easily causes atmospheric pollution. The common underground water risk management and control technology comprises vertical blocking, hydraulic control and the like, and aims to block the migration path of pollutants in underground water. According to experience, the treatment of organic polluted groundwater usually needs combined application of remediation and risk management and control, and because of the complexity of groundwater pollution, the problems of pollution tailing, rebound and the like are often faced when only groundwater remediation measures are taken, and the remediation is difficult to reach the standard.

Disclosure of Invention

Based on this, it is necessary to provide a pollution site risk management and control collaborative repair system with dual functions of distance repair and risk management and control.

A pollution site risk management and control cooperative remediation system comprises a ground control system, a gas distribution system, a liquid distribution system and an underground filling unit, wherein the ground control system is arranged above the ground, and the gas distribution system and the liquid distribution system respectively extend into underground water to be remedied from the ground;

the underground filling unit comprises a steam invasion blocking layer, a water guide layer and biological filler, wherein the steam invasion blocking layer is arranged above an underground water level, the water guide layer forms a hollow groove-shaped structure with an opening on the upper surface, the upper surface of the hollow groove-shaped structure is abutted to the steam invasion blocking layer, a reaction area is formed inside the hollow groove-shaped structure, and the reaction area is provided with the biological filler;

ground control system includes solar cell panel energy storage module, has thermal-insulated shell, air-blower and medicament jar of thermal convection structure, solar energy storage module with the internal connection of thermal-insulated shell is used for doing the thermal-insulated shell inner space provides the heat, the air-blower sets up the inner space of thermal-insulated shell and the air outlet of air-blower with the gas distribution headtotail, the medicament jar with the liquid distribution headtotail.

In one embodiment, the solar energy storage module comprises a photovoltaic panel, a heat transfer pipeline and a thermoelectric converter, wherein the photovoltaic panel is arranged on the top of the heat insulation shell, and the interior of the heat insulation shell is connected with the photovoltaic panel through the heat transfer pipeline.

In one embodiment, one end of the thermoelectric converter is connected with the photovoltaic panel, and the other end of the thermoelectric converter is respectively connected with the blower, and the thermoelectric converter converts part of the heat energy of the photovoltaic panel into electric energy to supply power to the blower.

In one embodiment, the bottom of the heat insulation shell with the heat convection structure is provided with a first convection hole, and the top of the heat insulation shell with the heat convection structure is provided with a second convection hole.

In one embodiment, the first convection hole is a plurality of holes forming a first array; the second convection holes are multiple and form a second array; each first convection hole of the first array is opposite to or staggered with each second convection hole of the second array.

In one embodiment, the gas distribution system has a plurality of gas outlets, the liquid distribution system has a plurality of liquid outlets, the gas outlets of the gas distribution system are centrally distributed on one side of the reaction zone, and the liquid outlets of the liquid distribution system are centrally distributed on the opposite side of the reaction zone.

In one embodiment, the gas outlet direction of the gas distribution system is the same as the liquid outlet direction of the liquid distribution system.

In one embodiment, the biological filler is a homogeneous mixture of porous media and mineral ore particles.

In one embodiment, the material of the heat insulation shell is selected from any one or more of glass wool, rock wool heat preservation felt and aluminum silicate.

In one embodiment, the material of the vapor intrusion barrier layer is natural clay.

In one embodiment, the material of the water-guiding layer is selected from one or more of gravel, sand, silt and silt.

The system fully utilizes the natural diffusion and dispersion effects of the medicament in the underground water by constructing an underground high-permeability space. Through the coupling design of the heat insulation shell of the thermal convection structure and the solar energy, the thermal convection effect is fully utilized, the temperature and oxygen supply of the ground space are effectively maintained, and the requirements of continuous oxygen supply and water bath heat preservation of the traditional biological agent are met, so that the system is low in energy consumption and environment-friendly; and through setting up barrier layer and water guide layer, cooperation ground control system forms the centralized processing district, and this system has realized vertical separation and prosthetic dual purpose, and can operate for a long time under the condition of no manual operation. The system has short installation time, simple construction mode, small field labor amount and low cost of manpower and material resources. The main components of the system are standardized products (such as solar panels, pipes and fans) and natural resources (such as gravel and clay), so the manufacturing cost is low. The spatial distribution of the independent installation units of the system can be flexibly arranged, so that the pollution areas with different shapes can be effectively configured. The system has the functions of blocking and microorganism enhanced degradation, and has certain water conservancy regulation and control capability, so that the system can play a role in repairing and risk control cooperative treatment on the organic polluted underground water.

Drawings

Fig. 1 is a schematic cross-sectional view of a contaminated site risk management and control cooperative remediation system according to an embodiment of the present invention;

fig. 2 is a schematic plan view of a pollution site risk management and control cooperative remediation system according to an embodiment of the present invention;

fig. 3 is a schematic view of a remediation principle and effect of the contaminated site risk management and control cooperative remediation system according to an embodiment of the present invention.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The conventional groundwater treatment method or apparatus is as follows:

contaminated site risk management and control is repair system in coordination based on functional separation: the system comprises a ring field groove, a water collecting and draining system, a repairing filler layer, an aeration system and a filter layer. The system achieves the purpose of repairing pollution while realizing obstruction by pumping underground water to a water treatment system for biological treatment. However, the system also needs to continuously extract underground water to a biological treatment facility on the basis of the construction of the barrier facility, and the equipment investment and the operation cost are high.

Groundwater prosthetic devices: comprises a water taking well and an injection well, and a water suction pump, a reaction box and an aeration pump are arranged on the ground. The system extracts underground water, repairs heterotopic nutrient solution, and adopts aeration to strengthen biological repair during recharging, thereby improving the repair effect on the underground water. However, the patent can only be used for groundwater ex situ treatment, extraction treatment is needed, the biological treatment time is long, and the corresponding operation cost is high. In addition, the system uses more ground facilities, resulting in increased equipment costs.

The permeable reactive barrier and the groundwater pollution in-situ bioremediation method comprise the following steps: relates to a permeable reaction wall system. The system consists of a plurality of reaction units, wherein each reaction unit comprises a pumping well, an aeration well, a biological reaction filler, an impervious wall, a detection system and an automatic control system. The system enhances the utilization of the microorganisms to iron ions in the reaction filler through intermittent aeration so as to generate redox effect, thereby achieving the effect of efficiently removing ammonia nitrogen pollutants in underground water. However, the system is complex in structure and high in construction cost, and the intermittent aeration operation parameters need to be regulated and controlled by monitoring the water quality, so that the operation difficulty is high.

The conventional groundwater remediation and management and control methods and the above cited several technologies have the following disadvantages:

1. by using ex-situ remediation modes such as extraction treatment, multiphase extraction and the like, the polluted underground water needs to be extracted and then treated, more ground facilities are needed, and the cost is higher.

2. By using the traditional in-situ restoration methods such as in-situ chemical oxidation and in-situ thermal desorption, a large amount of medicaments or energy sources need to be input in the system operation process, and the methods easily cause secondary pollution.

3. By using risk management and control modes such as vertical separation and hydraulic control, pollutants in underground water are difficult to degrade, the field application is limited in the long term, and the resource of the underground water cannot be recovered.

4. Most of the repair or risk management methods require the construction of permanent facilities on the ground, such as cement ground for operation, underground water wells, etc., resulting in increased cost and affecting the development and utilization of the land.

In-situ bioremediation system for petroleum polluted soil and underground water: the system comprises a hollow fiber membrane oxygenerator, an aeration system, an aeration well, a microbial preparation storage tank, a medicament injection system and a medicament injection well. The system stimulates the metabolism function of microorganisms in the polluted soil and the underground water by a mode of combining oxygen and the petroleum biodegradation agent, accelerates the degradation process of petroleum pollutants and shortens the repair time. However, compared with the traditional in-situ chemical oxidation technology, the system has the advantages that the main ground equipment is more complex, the bioremediation period is longer, and the construction and operation costs are not superior.

The embodiment of the invention provides a pollution site risk management and control cooperative repair system which comprises a ground control system, a gas distribution system, a liquid distribution system and an underground filling unit. The ground control system is arranged above the ground, and the gas distribution system and the liquid distribution system respectively extend into underground water to be restored from the ground.

Underground filling unit includes steam invasion barrier layer, water guide layer and biofilm carrier, steam invasion barrier layer sets up more than the ground water level, water guide layer forms upper surface open-ended cavity groove-shaped structure, the upper surface of cavity groove-shaped structure with steam invasion barrier layer butt, the inside reaction zone that forms of cavity groove-shaped structure, the reaction zone has biofilm carrier.

Ground control system includes solar cell panel energy storage module, has thermal-insulated shell, air-blower and medicament jar of thermal convection structure, solar energy storage module with the internal connection of thermal-insulated shell is used for doing the thermal-insulated shell inner space provides the heat, the air-blower sets up the inner space of thermal-insulated shell and the air outlet of air-blower with the gas distribution headtotail, the medicament jar with the liquid distribution headtotail.

The system fully utilizes the natural diffusion and dispersion effects of the medicament by constructing a high-permeability space. Through the coupling design of the heat insulation shell of the thermal convection structure and the solar energy, the thermal convection effect is fully utilized, the temperature and oxygen supply of the ground space are effectively maintained, and the requirements of continuous oxygen supply and water bath heat preservation of the traditional biological agent are met, so that the system is low in energy consumption and environment-friendly; and through setting up barrier layer and water guide layer, cooperation ground control system forms the centralized processing district, and this system has realized vertical separation and prosthetic dual purpose. The system has short installation time, simple construction mode, small field labor amount and low cost of manpower and material resources. The main components of the system are standardized products (such as solar panels, pipes and fans) and natural resources (such as gravel and clay), so the manufacturing cost is low. The spatial distribution of the independent installation units of the system can be flexibly arranged, so that the pollution areas with different shapes can be effectively configured. The system has the functions of blocking and microorganism enhanced degradation, and has certain water conservancy regulation and control capability, so that the system can play a role in repairing and risk control cooperative treatment on the organic polluted underground water.

The chemical tank is a corrosion-resistant plastic tank body, the top of the chemical tank body is open and ventilated, biological agents are contained in the chemical tank body, and the biological agents are injected underground to promote biodegradation of organic matters.

In the system, the transmission of aeration and medicament relies on solar energy, and at the operation in-process, makes the thermal-insulated space temperature on ground rise through solar energy storage module, and outside cold air gets into from the convection current structure of thermal-insulated shell bottom, and the inside hot-air of thermal-insulated shell passes through the convection current structure and discharges, forms the convection current effect, has promoted the circulation of air, satisfies biological medicament's oxygen suppliment and temperature maintenance demand, has reduced system's running cost. In some embodiments, the solar energy storage module comprises a photovoltaic panel, a heat transfer circuit and a thermoelectric converter, the photovoltaic panel is disposed on top of the heat insulation housing, the interior of the heat insulation housing is connected with the photovoltaic panel through the heat transfer circuit, and the heat energy enriched in the photovoltaic panel is transferred to the interior of the heat insulation space through the heat transfer circuit.

In some embodiments, the surface control system comprises a peristaltic pump. The medicament tank is connected with the liquid distribution system through a peristaltic pump.

In some embodiments, one end of the thermoelectric converter is connected to the photovoltaic panel, and the other end is connected to the blower and the peristaltic pump, respectively, and the thermoelectric converter converts part of the thermal energy of the photovoltaic panel into electric energy to power the blower and the peristaltic pump.

In some embodiments, the material of the thermal insulation casing may be a commonly used wall insulation material, such as any one or more selected from glass wool, rock wool insulation blanket, and aluminum silicate.

In some embodiments, the bottom of the thermal insulation shell with the thermal convection structure is provided with a first convection hole, and the top of the thermal insulation shell with the thermal convection structure is provided with a second convection hole.

In some embodiments, the first convection hole is a plurality of holes forming a first array. The second convection holes are multiple and form a second array. Each first convection hole of the first array is opposite to or staggered with each second convection hole of the second array. That is, the number of first convection holes of the first array and the number of second convection holes of the second array may be the same or different. The arrangement positions of the convection holes of the first array and the second array can be the same or different. The first convection hole of the bottom part can be arranged at the middle position of the bottom part and can also be arranged at the position of the bottom part close to the edge. The second convection hole of the top part can be arranged at the middle position of the top part and can also be arranged at the position close to the edge.

"steam invasion" is a term used to refer to the process by which volatile organic compounds in soil and groundwater are converted to a gaseous state which migrates through the soil voids to the surface. The steam invasion barrier layer is formed by low-permeability materials to prevent steam invasion. In some embodiments, the material of the vapor intrusion barrier layer is clay.

Biological agent and oxygen (air) transmit to the biofilm carrier reaction layer of underground filling unit through gas distribution system and cloth liquid system respectively, and the water guide layer of its parcel is used for constructing high permeability space around, and oxygen and agent in the air of being convenient for transmit in the groundwater, promote simultaneously and pollute groundwater to middle zone gathering, and the steam invasion barrier layer that is located the above part of aeration zone comprises clay for the upward migration of separation volatile organic matter. The thickness of the steam invasion blocking layer is 1 m-2 m, and if the pollution depth is shallow, the original soil covering may not be needed. If the groundwater level is deep, the steam invasion blocking layer is covered with an original soil layer.

The water diversion layer material can be made of gravel, sandy soil, silt and other natural ore raw materials, can be single or can be a mixture of a plurality of materials, is determined according to the permeability coefficient of a natural aquifer, and the permeability coefficient of the constructed water diversion layer is required to be at least 1 order of magnitude higher than that of the surrounding underground aquifer. The position of the water guide layer is below the underground water level and is mainly determined according to the pollution range of underground water, and the depth of the water guide layer is required to reach the polluted bottom in principle. The width between the water conducting layers at the two sides is 3 m-6 m, and the length is not more than 20 m.

In some embodiments, the gas distribution system has a plurality of gas outlets and the liquid distribution system has a plurality of liquid outlets. The gas distribution system is intensively distributed at one side of the reaction zone, and the liquid distribution system is intensively distributed at the opposite side of the reaction zone. The gas outlets are centrally located on one side of the reaction zone and the liquid outlets are centrally located on the opposite side of the reaction zone. For example, the left side of the entire reaction zone system is the agent and the right half is the gas. The system constructs a green biological reaction zone through the rapid action of oxygen and microorganism stimulation in a high-permeability space, promotes the degradation of microorganisms to organic pollutants, and realizes bioremediation.

In some embodiments, the opening direction of the gas outlet is the same as the opening direction of the liquid outlet. Specifically, the gas distribution system may be dendritic, and has a main tube and a side tube extending out of the main tube, and the side tube has a gas outlet. The liquid distribution system can be dendritic and is provided with a main pipe and a side pipe extending out of the main pipe, and the side pipe is provided with a liquid outlet. The gas distribution guide pipe is provided with a plurality of branch pipes in the underground vertical direction, the vertical distance between every two branch pipes is 1m, the aperture of the branch pipe aeration hole with the buried depth is smaller, and the aperture of the branch pipe aeration hole with the buried depth is larger, so that the size of deep bubbles in a reaction zone is large, and the size of shallow bubbles is small. The purpose of this is: pressure is balanced, and the phenomenon that bubbles cannot be formed due to overlarge deep pressure under the condition of uniform hole opening is prevented; secondly, the deep large bubbles are more favorable for driving the organic pollutants to move upwards to the reaction area. The aeration design of the directional gas distribution system in the system adopts the fine design of a gradient difference structure, so that the direction of bubbles can be effectively controlled and the bubbles can be uniformly distributed in the underground environment.

In some embodiments, the biological filler is a homogeneous mixture of porous media and ore particles. For example, the biological filler is a uniform mixture of porous media (such as activated carbon, biological carbon and the like) and inorganic ore particles (such as gravel, zeolite, quartz sand and the like), the proportion of the biological filler is judged according to site conditions, and the principle is that the permeability coefficient after mixing is 0-1 order of magnitude higher than that of the water guiding layer.

The underground filling unit is designed by adopting a permeability gradient, and comprises a water guide layer, a biological reaction area and an area consisting of a steam invasion blocking layer, wherein the three areas consist of different fillers, and the permeability has great difference, so that the migration tendency of underground water and pollutants in the three areas is controlled: the underground water around the area → the high permeability water guide layer → the active biological reaction area, and the steam invasion blocking layer can prevent the organic matters in the active biological reaction area from migrating to the aeration zone to cause the upper soil pollution. The risk control purposes of pollution migration blocking and pollution plume control are achieved through the permeability gradient design of the filling area, and therefore organic polluted groundwater remediation and risk control cooperative treatment are achieved at low cost.

One embodiment is as follows.

Example (b):

as shown in fig. 1 and 2, the present embodiment provides a low-carbon, low-cost, and efficient green biological reaction zone for degrading organic pollutants in groundwater. The green bioreaction zone consists of 4 systems including: the system comprises a ground control system, a gas distribution system, a liquid distribution system and an underground filling unit. The ground control system consists of a solar cell panel energy storage module, a heat insulation shell with a heat convection structure, an air blower, a peristaltic pump and an oxygenation container, and is connected with the air distribution system and the liquid distribution system. The solar energy storage module comprises a photovoltaic panel, a heat transfer pipeline and a thermoelectric converter, wherein the photovoltaic panel is arranged at the top of the heat insulation shell to absorb solar energy for heating, the heat transfer pipeline is connected with the photovoltaic panel and the interior of the heat insulation shell, and water in the pipeline absorbs heat and then is heated to raise the temperature in the heat insulation shell; the thermoelectric converter is connected with the photovoltaic panel, the blower and the peristaltic pump, and converts redundant heat energy into electric energy. The underground filling unit consists of a steam invasion blocking layer, a water conducting layer and a biological filler layer. Biological agent and oxygen transmit to the biological packing layer of underground filling unit through gas distribution and liquid distribution system respectively, and the water guide layer of its parcel is used for constructing high permeability space around it, and oxygen and the medicament in the air transmit in the groundwater of being convenient for, promote simultaneously and pollute groundwater to middle zone gathering, and the steam invasion barrier layer that lies in the portion above the aeration area comprises clay for the upwards migration of separation volatile organic matter.

In the system, the transmission of aeration and medicament relies on solar energy, and in the operation process, the heat insulation space temperature on ground is raised through solar energy, and outside cold air gets into from the convection current hole of thermal-insulated shell bottom, and inside hot-air passes through the convection current hole discharge at top, forms the convection current effect, has promoted the circulation of air, satisfies biological medicament's oxygen suppliment and temperature and maintains the demand, has reduced system's running cost. The system constructs a green biological reaction zone through the rapid action of oxygen and microorganism stimulation in a high-permeability space, promotes the degradation of microorganisms to organic pollutants, realizes bioremediation, and achieves the purpose of risk control of pollution migration blocking and pollution plume control through the permeability gradient design of a filling area, thereby realizing the remediation of organic polluted groundwater and the cooperative management and control of risk control at lower cost.

Pollutants in the groundwater are gathered to an active biological reaction zone through a high-permeability water guide layer (figure 1), in the active biological reaction zone, a biological medicament is directionally transmitted from one side, oxygen is transmitted from a two-phase barrier zone at the other side, an ideal environment beneficial to the growth of microorganisms is constructed in a biological filler space, and under the condition, the oxygen content gradually rises, the microorganisms rapidly grow, and the pollutants are rapidly degraded (figure 3); as the contaminants are transported to the two-phase barrier zone, the migration of the contaminants is physically blocked by the constantly migrating upward bubbles (fig. 1), where the contaminants are further degraded, and although oxygen is maintained at a higher concentration level, the carbon source available for the microorganisms is constantly reduced and the total microbial load gradually decreases (fig. 3). In the operation process of the system, the heat convection effect (figure 2) is fully utilized through the coupling design of the convection hole and the solar energy, the temperature and the oxygen supply of the ground space are effectively maintained, and the requirements of continuous oxygen supply and water bath heat preservation of the traditional biological medicament are met.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, so as to understand the technical solutions of the present invention specifically and in detail, but not to be understood as the limitation of the patent protection scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the patent of the invention is subject to the appended claims, and the description can be used for explaining the contents of the claims.