New pollutant underground water treatment device and method based on biology-electrolysis technology

Abstract

The invention provides a new pollutant underground water treatment device and method based on a biology-electrolysis technology, the new pollutant underground water treatment device comprises a biochemical pool and an electrolytic tank, and the biochemical pool is communicated with the electrolytic tank; a water inlet pipe and an aeration pipe are arranged at the bottom of the biochemical pool; electrode plates are respectively arranged on the inner sides of two opposite tank walls of the electrolytic tank, iron powder layers are arranged on the inner sides of the electrode plates, and an adsorption layer is arranged between the two iron powder layers. According to the new pollutant underground water treatment device and method based on the biology-electrolysis technology, novel pollutants in underground water and sewage can be effectively removed.

Description

Technical Field

[0001] The present invention belongs to the technical field of water pollution control, and in particular, relates to a new pollutant groundwater treatment device and method based on bio-electrolysis technology. Background Art

[0002] With the continuous improvement of environmental protection awareness and the continuous advancement of science and technology, the control of new pollutants is being fully promoted. Many new pollutants that were previously ignored, low in concentration, and difficult to biodegrade have gradually entered the field of vision and control targets of environmental managers. These new pollutants include but are not limited to antibiotic residues in contaminated water and compounds such as PFAS (per- and polyfluoroalkyl substances). Although these substances are not in high concentrations, they pose potential long-term hazards to the environment and ecosystems, so effective control methods are urgently needed.

[0003] Traditional sewage treatment methods, such as the widely used activated sludge method, often seem powerless when facing these new pollutants. These methods are difficult to effectively degrade these substances to meet the emission standards, resulting in the continuous discharge of these pollutants into the environment, continuous enrichment in the environment, and continuous toxicity to the ecosystem. They may even interfere with the endocrine system of organisms, causing more extensive and far-reaching impacts. Electrolysis technology is considered to be a potential method for effectively degrading difficult-to-degrade pollutants such as PFAS. This technology decomposes pollutants through electrochemical reactions and can theoretically convert them into harmless substances. However, in practical applications, since the concentration of such new pollutants in contaminated water is usually very low, the electrolysis process often electrolyzes water and other compounds in the contaminated water, and the energy consumption is particularly high. The degradation efficiency of such pollutants is very low, and the treatment effect is poor, which is difficult to meet the needs of large-scale contaminated water treatment. Therefore, there is an urgent need for a treatment device that can quickly and efficiently treat new pollutants in new pollutant groundwater. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a new pollutant groundwater treatment device and method based on bio-electrolysis technology, which can effectively remove new pollutants in contaminated water.

[0005] To solve the above technical problems, the embodiments of the present invention adopt the following technical solutions: In the first aspect, an embodiment of the present invention provides a new pollutant groundwater treatment device based on bio-electrolysis technology, including a biochemical pool and an electrolytic pool, wherein the biochemical pool is connected to the electrolytic pool; a water inlet pipe and an aeration pipe are provided at the bottom of the biochemical pool; electrode plates are respectively provided on the inner sides of two opposite pool walls of the electrolytic pool, an iron powder layer is provided on the inner side of the electrode plate, and an adsorption layer is provided between the two iron powder layers.

[0006] As a further improvement of the embodiment of the present invention, the adsorption layer is made of conductive polymer, graphene and its derivatives, carbon nanotubes, activated carbon composite materials or metal organic framework and carbon-based composite materials.

[0007] As a further improvement of the embodiment of the present invention, it also includes a clean water tank, the water inlet of the electrolytic cell is connected to the biochemical tank, and the water outlet is connected to the clean water tank; a rotating component is provided in the clean water tank, and the rotating component is connected to the battery via a generator and a converter, and the battery supplies power to the electrode plate.

[0008] As a further improvement of the embodiment of the present invention, the water inlet is located at the lower part of the pool wall on one side of the electrolytic cell, and the water outlet is located at the upper part of the pool wall on the other side of the electrolytic cell.

[0009] As a further improvement to the embodiment of the present invention, the bottom surface of the water outlet is arranged to be inclined downward.

[0010] As a further improvement of the embodiment of the present invention, the top of the biochemical pool is covered with a solar panel, and the solar panel is connected to the battery through a converter.

[0011] As a further improvement of the embodiment of the present invention, the flow rate of the water outlet is smaller than the flow rate of the water inlet.

[0012] In a second aspect, an embodiment of the present invention further provides a method for treating groundwater with new pollutants based on bio-electrolysis technology, using the device for treating groundwater with new pollutants based on bio-electrolysis technology provided in the first aspect; the method comprises: Step 10, inputting polluted water into the biochemical pool for aeration, treating organic pollutants in the polluted water by biodegradation, and the treated polluted water enters the electrolytic cell; Step 20, the polluted water flows from the water inlet to the water outlet in the electrolytic cell, the iron powder layer and the adsorption layer adsorb the pollutants in the polluted water, and finally the water flows out from the water outlet; Step 30, detecting the concentration of pollutants in the water at the water outlet, if the concentration exceeds a preset threshold, stopping the input of polluted water into the biochemical pool; energizing the electrode plates to electrolyze the pollutants adsorbed in the iron powder layer and the adsorption layer; after a preset time period, de-energizing the electrode plates to input polluted water into the biochemical pool.

[0013] As a further improvement of the embodiment of the present invention, in step 30, when electrolysis is carried out, the iron powder layer and the adsorption layer supply electrons to the pollutants on the one hand, and on the other hand generate a large number of free radicals to react with the pollutants adsorbed on the surface; when the macromolecular pollutants are degraded into small molecules with different anionic and cationic ion groups, they migrate to the two electrode plates respectively, and during the migration process, the degraded small molecular pollutants are further adsorbed and catalytically degraded by the iron powder layer.

[0014] As a further improvement of the embodiment of the present invention, the present invention further includes: Step 40, water flowing out of the outlet of the electrolytic cell falls into the clean water pool, and in the process of flowing from top to bottom, drives the rotating component to rotate, drives the engine to generate electricity, and stores the electricity in the battery through the converter; the solar energy component above the biochemical pool absorbs sunlight and converts it into electrical energy, and stores the electricity in the battery through the converter.

[0015] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: (1) The device and method for treating groundwater with new pollutants based on bio-electrolysis technology provided by the present invention first utilizes a biochemical pool to biodegrade most of the organic pollutants in the polluted water, and then utilizes an electrolytic cell to adsorb new pollutants such as antibiotics and PFAS in the polluted water, thereby effectively removing the new pollutants in the polluted water and concentrating the concentration of the new pollutants in the adsorption layer. The new pollutants in the adsorption layer are electrolyzed by energizing the positive and negative electrodes, which will not electrolyze too much water and other pollutants, thereby improving the electrolysis efficiency. The present invention first utilizes biodegradation to greatly reduce the concentration of pollutants in the polluted water, and then inputs the pollutants into the electrolytic cell, which can reduce the processing burden of the adsorption layer, prevent the adsorption layer from being saturated in a short time, and improve the processing efficiency. An iron powder layer is set between the adsorption layers. The iron powder layer can adsorb new pollutants and improve the pollutant treatment effect. Moreover, during electrolysis, the iron powder layer not only supplies electrons to the pollutants, but also produces a large number of free radicals to react with the pollutants adsorbed on the surface. When the macromolecular pollutants are degraded into small molecules with different anionic and cationic ion groups, they migrate to the two electrode plates respectively. During the migration process, the degraded small molecule pollutants are further adsorbed and catalytically degraded by the iron powder layer, thereby improving the degradation efficiency. The pollutant concentration in the effluent is monitored in real time. When the effluent pollutant concentration reaches a preset threshold, that is, the adsorption layer is about to be saturated, the electrode plates are energized to electrolyze the new pollutants in the adsorption layer. After a preset period of time, the power is stopped to ensure the treatment efficiency while reducing energy consumption.

[0016] (2) The adsorption layer in the present invention is made of conductive material. The adsorption layer with conductive function can not only adsorb pollutants, but also, after the electrode is energized, on the one hand, the surface of the conductive material supplies electrons to the pollutants, and on the other hand, a large number of free radicals are generated on the surface of the conductive material to react with the pollutants adsorbed on the surface of the conductive material, thereby greatly improving the redox degradation ability, thereby reducing the energy consumption of electrolysis and improving the electrolysis efficiency.

[0017] (3) The present invention utilizes the process of water flowing out of the water outlet of the electrolytic cell falling into the clean water tank to drive the rotating component to rotate, drive the engine to generate electricity, and store the electricity in the battery through the converter; at the same time, the solar energy component above the biochemical pool absorbs sunlight and converts it into electrical energy, which is stored in the battery through the converter and used to supply power during electrolysis, thereby making full use of new energy and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a new pollutant groundwater treatment device based on bio-electrolysis technology according to an embodiment of the present invention; Figure 2 yes Figure 1 A top view of the electrolytic cell; Figure 3 yes Figure 1 Front view of the electrolytic cell.

[0019] In the figure: biochemical pool 1, electrolytic pool 2, water inlet 201, electrode plate 202, iron powder layer 203, adsorption layer 204, water outlet 205, clean water pool 3, rotating component 4, generator 5, converter 6, battery 7, solar energy component 8, aeration pipe 9, electrode 10, gas outlet 11. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is described in detail below.

[0021] The embodiment of the present invention provides a new pollutant new pollutant groundwater biological - intermittent electrolysis treatment device, such as Figure 1 As shown, it includes a biochemical pool 1 and an electrolytic pool 2, and the biochemical pool 1 is connected to the electrolytic pool 2. A water inlet pipe and an aeration pipe 9 are provided at the bottom of the biochemical pool 1. There are microorganisms in the biochemical pool 1, and organic pollutants in the polluted water can be biodegraded through aeration. Figure 2 and Figure 3 As shown, electrode plates 202 are respectively provided on the inner sides of two opposite pool walls of the electrolytic cell 2, an iron powder layer 203 is provided on the inner side of the electrode plate 202, and an adsorption layer 204 for adsorbing pollutants is provided between the two iron powder layers 203.

[0022] In the above embodiment, the polluted water enters the biochemical pool 1 from the bottom of the biochemical pool, and is aerated through the aeration pipe to biodegrade the organic pollutants in the polluted water, which greatly reduces the concentration of pollutants in the polluted water, so that the polluted water contains only a very small amount of organic pollutants and new pollutants such as antibiotics and PFAS that cannot be treated by biodegradation. The polluted water then enters the electrolytic cell 2. In the process of flowing from the water inlet to the water outlet in the electrolytic cell, the pollutants in the polluted water are adsorbed by the iron powder layer 203 and the adsorption layer 204, and finally the treated water flows out from the water outlet. The concentration of pollutants in the water is detected at the water outlet. If the concentration exceeds the preset threshold, the input of polluted water into the biochemical pool is stopped. Power is supplied to the electrode plate to electrolyze the pollutants adsorbed in the iron powder layer and the adsorption layer. After the preset time period, the power supply is stopped. Polluted water is input into the biochemical pool to continue the polluted water treatment.

[0023] The embodiment of the present invention first uses a biochemical pool to perform biodegradation treatment on the polluted water, which can degrade most of the organic pollutants in the polluted water; then uses an electrolytic cell to adsorb new pollutants such as antibiotics and PFAS in the polluted water, which can effectively remove the new pollutants in the polluted water and concentrate the concentration of the new pollutants in the adsorption layer; finally, the new pollutants in the iron powder layer and the adsorption layer are electrolyzed, and the water will not be electrolyzed too much, thereby improving the electrolysis efficiency. The present invention first uses biodegradation to greatly reduce the concentration of pollutants in the polluted water and then inputs the electrolytic cell, which can reduce the processing burden of the electrolytic cell, prevent the adsorption layer from being saturated in a short time, and improve the processing efficiency. An iron powder layer is set between the electrode plate and the adsorption layer in the electrolytic cell. The iron powder layer can adsorb new pollutants and improve the pollutant treatment effect. Moreover, during electrolysis, the iron powder layer not only supplies electrons to the pollutants, but also generates a large number of free radicals to react with the pollutants adsorbed on the surface. When the macromolecular pollutants are degraded into small molecules with different cation and anion ion groups, they migrate to the two electrode plates respectively. During the migration process, the degraded small molecule pollutants are further adsorbed and catalytically degraded by the iron powder layer, thereby improving the degradation efficiency. The concentration of pollutants in the effluent is monitored in real time. When the concentration of effluent pollutants reaches the preset threshold, that is, the adsorption layer is about to be saturated, the electrode plates are energized to electrolyze the adsorbed new pollutants. After a preset period of time, the power is stopped to ensure treatment efficiency while reducing energy consumption.

[0024] As a preferred example, the adsorption layer 204 is made of conductive polymers, graphene and its derivatives, carbon nanotubes, activated carbon composite materials, or metal organic framework and carbon-based composite materials.

[0025] The adsorption layer 204 made of one or more of the above materials can adsorb organic pollutants and have conductive properties. Among them, graphene has a very large specific surface area and highly adjustable surface chemical properties, can effectively adsorb a variety of organic pollutants, and has high conductivity. The tubular structure of carbon nanotubes enables it to effectively adsorb organic molecules, especially polycyclic aromatic hydrocarbons, and has strong conductivity. Conductive polymers (such as polypyrrole, polyaniline, etc.) can adsorb organic pollutants by adjusting their surface chemical properties and porous structures. These polymers have certain conductivity and can further improve their conductivity by doping and other methods. Activated carbon has a very large specific surface area and rich pore structure, and can adsorb a variety of organic pollutants. By compounding activated carbon with a conductive material (such as graphene, carbon nanotubes or conductive polymers), an activated carbon composite material is obtained, which can improve conductivity. Metal organic frameworks (MOFs) have adjustable pore structures and large specific surface areas, and can effectively adsorb organic pollutants. By combining MOFs with conductive materials (such as graphene and carbon nanotubes) to form metal-organic frameworks (MOFs) and carbon-based composites, the conductive properties can be improved.

[0026] In the above embodiment, the adsorption layer is made of conductive material. The adsorption layer with conductive function can not only adsorb pollutants, but also after the electrode is energized, on the one hand, the surface of the conductive material supplies electrons to the pollutants, and on the other hand, a large number of free radicals are generated on the surface of the conductive material to react with the pollutants adsorbed on the surface of the conductive material, thereby greatly improving the redox degradation ability, thereby reducing the energy consumption of electrolysis and improving the electrolysis efficiency.

[0027] As a preferred example, the new pollutant groundwater treatment device of this embodiment also includes a clear water tank 3, the water inlet 201 of the electrolytic cell 2 is connected to the biochemical tank 1, and the water outlet 205 is connected to the clear water tank 3. A rotating assembly 4 is provided in the clear water tank 3, and the rotating assembly 4 is located at the lower part of the clear water tank. The rotating assembly 4 is connected to the battery 7 via the generator 5 and the converter 6, and the battery 7 supplies power to the electrode plate 202. The bottom of the clear water tank 3 is lower than the bottom of the electrolytic cell, and the height of the water outlet 205 from the bottom of the clear water tank is increased, and the impact force of the falling water is increased, so that the rotating assembly obtains greater kinetic energy, thereby increasing the power generation. Preferably, the flow rate of the water outlet 205 is less than the flow rate of the water inlet 201. Increasing the water pressure at the water outlet increases the impact force of the fall, and further increases the power generation efficiency.

[0028] In this embodiment, water flowing out of the water outlet of the electrolytic cell falls into the clean water tank, and in the process of flowing from top to bottom, it drives the rotating assembly 4 to rotate, drives the engine 5 to generate electricity, and stores the electricity in the battery 7 through the converter 6. This provides power for electrolysis, fully utilizes new energy, and saves costs.

[0029] Preferably, the top of the biochemical pool 1 is covered with a solar panel 8, which is connected to the storage battery 7 through a converter 6. The top of the wall of the biochemical pool 1 and the solar panel 8 are both provided with an air outlet 11 for exhaust. In this embodiment, the solar panel 8 can not only cover the biochemical pool 1 to prevent the external environment from affecting the biochemical degradation, but also absorb sunlight and convert it into electrical energy, which is stored in the storage battery 7 through the converter 6. It can provide power for electrolysis, make full use of new energy, and save costs.

[0030] As a preferred example, the water inlet 201 is located at the lower part of the wall of one side of the electrolytic cell, and the water outlet 205 is located at the upper part of the wall of the other side of the electrolytic cell. After the new pollutant groundwater enters the electrolytic cell from the lower part of one side, it flows upward to the other side, which can extend the flow path, so that the pollutants in the polluted water are fully absorbed by the iron powder layer and the adsorption layer, thereby improving the treatment effect. Moreover, the water outlet 205 is located at the upper part of the electrolytic cell, further increasing the height of the water outlet 205 from the bottom of the clean water tank, increasing the impact force of the falling water, and allowing the rotating component to obtain greater kinetic energy, thereby increasing the power generation.

[0031] Preferably, the bottom surface of the water outlet 205 is tilted downward, so that water flows out along the bottom surface of the water outlet, avoiding the water falling in a parabola and losing energy, thereby increasing the impact force and increasing the power generation.

[0032] The present invention also provides a method for treating new pollutant groundwater based on bio-electrolysis technology, using Figure 1 The new pollutant groundwater treatment device based on bio-electrolysis technology is shown. The method includes: Step 10, inputting polluted water into the biochemical pool 1 for aeration, treating organic pollutants in the polluted water by biodegradation, and the treated polluted water enters the electrolytic pool 2.

[0033] Step 20, the polluted water flows from the water inlet to the water outlet in the electrolytic cell, the iron powder layer 203 and the adsorption layer 204 adsorb the pollutants in the polluted water, and finally the water flows out from the water outlet.

[0034] Step 30, the concentration of pollutants in the water is detected at the water outlet. If the concentration exceeds a preset threshold, the input of polluted water into the biochemical pool is stopped. The electrode plate is powered on to electrolyze the pollutants adsorbed in the iron powder layer 203 and the adsorption layer 204. After a preset period of time, the electrode plate is powered off to input polluted water into the biochemical pool.

[0035] The above-mentioned embodiment method first uses biodegradation to greatly reduce the concentration of pollutants in the polluted water before inputting it into the electrolytic cell, which can reduce the processing burden of the adsorption layer, prevent the adsorption layer from being saturated in a short time, and improve the processing efficiency. In the electrolytic cell, the iron powder layer can adsorb new pollutants and improve the pollutant treatment effect; moreover, during electrolysis, the iron powder layer not only supplies electrons to the pollutants, but also produces a large number of free radicals to react with the pollutants adsorbed on the surface. When the macromolecular pollutants are degraded into small molecules with different cation and anion ion groups, they migrate to the two electrode plates respectively. During the migration process, the degraded small molecule pollutants are further adsorbed and catalytically degraded by the iron powder layer, thereby improving the degradation efficiency. The pollutant concentration in the effluent is monitored in real time. When the effluent pollutant concentration reaches the preset threshold, that is, the adsorption layer is about to be saturated, the electrode plate is energized to electrolyze the new pollutants in the adsorption layer. After the preset time period, the power is stopped to ensure the processing efficiency while reducing energy consumption.

[0036] As a preferred example, in step 30, during electrolysis, the iron powder layer 203 and the adsorption layer 204 provide electrons to the pollutants on one hand, and on the other hand, generate a large number of free radicals to react with the pollutants adsorbed on the surface. When the macromolecular pollutants are degraded into small molecules with different anionic and cationic ion groups, they migrate to the two electrode plates respectively. During the migration process, the degraded small molecular pollutants are further adsorbed and catalytically degraded by the iron powder layer.

[0037] As a preferred example, the method of this embodiment further includes: Step 40, the water flowing out of the water outlet of the electrolytic cell falls into the clean water tank, and in the process of flowing from top to bottom, drives the rotating component 4 to rotate, drives the engine 5 to generate electricity, and stores the electricity in the battery 7 through the converter 6. The solar energy component 8 above the biochemical pool 1 absorbs sunlight and converts it into electrical energy, and stores the electricity in the battery 7 through the converter 6.

[0038] This embodiment utilizes the impact force of water flowing out of the water outlet of the electrolytic cell to generate electricity for energy storage, and converts solar energy into electrical energy for storage, which is used to power the electrode plates during electrolysis, making full use of new energy and saving costs.

[0039] The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above specific embodiments, and the descriptions in the above specific embodiments and the specification are only for further illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed for protection.

Claims

1. A new pollutant groundwater treatment device based on bio-electrolysis technology, characterized in that: The invention comprises a biochemical pool (1) and an electrolytic pool (2), wherein the biochemical pool (1) is connected to the electrolytic pool (2); a water inlet pipe and an aeration pipe (9) are provided at the bottom of the biochemical pool (1); electrode plates (202) are provided on the inner sides of two opposite pool walls of the electrolytic pool (2), an iron powder layer (203) is provided on the inner side of the electrode plate (202), and an adsorption layer (204) is provided between the two iron powder layers (203).

2. The new pollutant groundwater treatment device based on bio-electrolysis technology according to claim 1 is characterized in that: The adsorption layer (204) is made of conductive polymer, graphene and its derivatives, carbon nanotubes, activated carbon composite materials, or metal organic framework and carbon-based composite materials.

3. The new pollutant groundwater treatment device based on bio-electrolysis technology according to claim 1 is characterized in that: It also comprises a clean water tank (3), wherein the water inlet (201) of the electrolytic cell (2) is connected to the biochemical tank (1), and the water outlet (205) is connected to the clean water tank (3); a rotating assembly (4) is provided in the clean water tank (3), and the rotating assembly (4) is connected to a storage battery (7) via a generator (5) and a converter (6), and the storage battery (7) supplies power to the electrode plate (202).

4. The new pollutant groundwater treatment device based on bio-electrolysis technology according to claim 3 is characterized in that: The water inlet (201) is located at the lower part of a wall on one side of the electrolytic cell, and the water outlet (205) is located at the upper part of a wall on the other side of the electrolytic cell.

5. The new pollutant groundwater treatment device based on bio-electrolysis technology according to claim 4 is characterized in that: The bottom surface of the water outlet (205) is arranged to be inclined downward.

6. The new pollutant groundwater treatment device based on bio-electrolysis technology according to claim 3 is characterized in that: The top of the biochemical pool (1) is covered with a solar energy component (8), and the solar energy component (8) is connected to a storage battery (7) via a converter (6).

7. The new pollutant groundwater treatment device based on bio-electrolysis technology according to claim 3 is characterized in that: The flow rate of the water outlet (205) is smaller than the flow rate of the water inlet (201).

8. A method for treating new pollutants in groundwater based on bio-electrolysis technology, characterized in that: A new pollutant groundwater treatment device based on bio-electrolysis technology as described in any one of claims 1 to 7; the method comprises: Step 10, inputting polluted water into the biochemical pool (1), aerating it, treating the organic pollutants in the polluted water by biodegradation, and the treated polluted water enters the electrolytic pool (2); Step 20, the polluted water flows from the water inlet to the water outlet in the electrolytic cell, the iron powder layer (203) and the adsorption layer (204) adsorb pollutants in the polluted water, and finally the water flows out from the water outlet; Step 30, detecting the concentration of pollutants in the water at the water outlet, and if the concentration exceeds a preset threshold, stopping the input of polluted water into the biochemical pool; energizing the electrode plates to electrolyze the pollutants adsorbed in the iron powder layer (203) and the adsorption layer (204); after a preset time period, de-energizing the electrode plates to input polluted water into the biochemical pool.

9. The method for treating new pollutants in groundwater based on bio-electrolysis technology according to claim 8, characterized in that: In step 30, when electrolysis is performed, the iron powder layer (203) and the adsorption layer (204) supply electrons to the pollutants on the one hand, and on the other hand, generate a large number of free radicals to react with the pollutants adsorbed on the surface; when the macromolecular pollutants are degraded into small molecules with different anionic and cationic ion groups, they migrate to the two electrode plates respectively. During the migration process, the degraded small molecular pollutants are further adsorbed and catalytically degraded by the iron powder layer.

10. The method for treating new pollutants in groundwater based on bio-electrolysis technology according to claim 8, characterized in that: Also includes: Step 40, water flowing out of the water outlet of the electrolytic cell falls into the clean water pool, and in the process of flowing from top to bottom, drives the rotating component (4) to rotate, drives the engine (5) to generate electricity, and stores the electricity in the battery (7) through the converter (6); the solar energy component (8) above the biochemical pool (1) absorbs sunlight and converts it into electrical energy, and stores the electricity in the battery (7) through the converter (6).

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