KR20190041104A - HYBRID DEVICE FOR generating electricity and Ground WATER TREATMENT - Google Patents

Abstract

The present invention provides a concentration difference power generation water treatment device capable of producing electricity and performing water treatment simultaneously. The electrochemical potential energy generated during an operation of a reverse electrodialysis (RED) device can be continuously used for an operation of an electrokinetic-permeable reaction wall to treat contaminants in the groundwater.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a water treatment system for generating electricity and groundwater,

The present invention relates to an integrated concentration-type power generation water treatment apparatus capable of simultaneously producing electricity and water, and more particularly, to an apparatus and a method for simultaneously and simultaneously performing concentration-based power generation and water purification using the principle of reverse electrodialysis (RED) and permeable reactive barrier (PRB) The present invention relates to a hybrid system capable of treating contaminants contained in groundwater.

Reverse electrodialysis (RED) refers to the recovery of salinity difference or concentration difference energy generated in the mixing process of two fluids having different concentrations, for example, seawater and fresh water, in the form of electric energy.

More specifically, reverse electrodialysis (RED) is a system in which a high-concentration solution and a low-concentration solution are used to generate a concentration difference, in which a cation and an anion dissolved in a high-concentration solution due to a difference in concentration between a high concentration solution and a low concentration solution, As a result of selectively moving through the exchange membrane and the anion exchange membrane, a potential difference is generated between the positive electrode and the negative electrode disposed on both sides of the stack on which the plurality of ion exchange membranes are arranged alternately, and an electric energy is generated through the oxidation- Device.

Here, the selective migration means that the cations in the high concentration solution pass through only the cation exchange membrane and the anions pass through only the anion exchange membrane.

Generally, the high concentration solution and the low concentration solution can be seawater and fresh water, and it is a power generation method that directly converts the chemical energy generated as the ions dissolved in the seawater (saline water) into the fresh water through the ion exchange membrane, It is a power generation device with less energy loss compared to power generation methods such as thermal power, hydropower, and nuclear power.

1, the permeable reaction wall (PRB) process is an underground wall filled with a reaction substrate to recover contaminated ground water, and dissolved pollutants are moved to a permeable reaction wall (PRB) by surrounding groundwater flow And the reaction material is processed while passing through the filled wall.

However, since permeable reaction walls purify contamination sources over a long period of time, recently, methods for improving the purification rate of contaminants by applying a coinfection purification technique to a permeable reaction wall have been studied.

Electrokinetic remediation refers to a technique in which a series of electrode rods are installed on a contaminated ground to supply a DC current so that contaminants existing in the ground can be removed by electrophoresis, And extracting them separately.

In general, positively charged contaminants move from the anode to the cathode direction as the DC current is supplied, so that the moved contaminants can be extracted by a pump near the cathode.

That is, when the reactive wall (PRB) is installed near the cathode using the combined electrodeposited-water permeable reaction wall (EK-PRB), the contaminant moved from the anode is decomposed by passing through the reaction wall installed near the cathode , It becomes unnecessary to extract the pollutant near the cathode.

However, the composite electroconductive-permeable reaction wall (EK-PRB) applied as described above is more effective than the conventional permeable reaction wall (PRB) used in the past, There is a problem that a large amount of energy is required.

Therefore, the use of electric energy is minimized and an effective groundwater treatment technique is required.

In addition, although these technologies disclose various research reports and articles to deal with soil contamination or groundwater contamination, the electrochemical potential energy generated in the operation of the reverse electrodialysis (RED) -PRB) has not yet been reported so far as it can be used continuously to treat groundwater pollutants.

The present invention relates to a process for the continuous production of electric groundwater pollutants by using the electrochemical potential energy generated during the operation of the retro-electrodialysis (RED) device for the operation of the electro-pervious reaction wall (EK-PRB) The present invention provides an integrated concentration-type power generation water treatment apparatus capable of simultaneous water treatment.

According to an aspect of the present invention, there is provided a plasma display panel comprising: a first electrode and a second electrode arranged to face each other at a predetermined interval; At least one first flow path in which the high concentration solution flows and at least one second flow path in which the low concentration solution flows, the second flow path being located on the second electrode side of the space between the first electrode and the second electrode; A plurality of ion exchange membranes for partitioning the first flow path and the second flow path; A reaction medium filled between the ion exchange membrane and the first electrode adjacent to the first electrode side; And a groundwater flow path formed between the reaction medium and the ion exchange membrane adjacent to the first electrode side.

A wall having an inlet and an outlet, and a predetermined space between the inlet and the outlet; A first electrode and a second electrode arranged to face each other at a predetermined interval in a predetermined space portion; At least one first flow path in which the high concentration solution flows and at least one second flow path in which the low concentration solution flows, the second flow path being located on the second electrode side of the space between the first electrode and the second electrode; A plurality of ion exchange membranes for partitioning the first flow path and the second flow path; A reaction medium filled between the ion exchange membrane and the first electrode adjacent to the first electrode side; And a groundwater flow path formed between the reaction medium and the ion exchange membrane adjacent to the first electrode side.

In addition, a wall having an inlet for introducing the ground water and a predetermined space for collecting the ground water; A groundwater pumping passage provided to pump groundwater collected in a predetermined space portion; A first electrode and a second electrode provided outside the predetermined space and arranged to face each other at a predetermined interval; At least one first flow path in which the high concentration solution flows and at least one second flow path in which the low concentration solution flows, the second flow path being located on the second electrode side of the space between the first electrode and the second electrode; A plurality of ion exchange membranes for partitioning the first flow path and the second flow path; A reaction medium filled between the ion exchange membrane and the first electrode adjacent to the first electrode side; And an underground water channel formed between the reaction medium and the ion exchange membrane adjacent to the first electrode side, wherein the groundwater pumping channel and the groundwater channel are fluidly connected to each other.

According to the present invention, it is possible to produce energy in a reverse electrodialysis (RED) device and use the energy thus produced for the operation of an electro-pervious reaction wall (EK-PRB), without using additional energy, It has the effect of treating pollutants of ground water.

In addition, the treated groundwater can be used as a source of a low-concentration solution, or carbon dioxide captured in conjunction with a CO2 capture device can be used as a source of a high-concentration solution to contribute to the reduction of atmospheric carbon dioxide and water-energy nexus.

1 is a schematic view showing a conventional water permeable reaction wall (PRB).
FIG. 2 and FIG. 3 are block diagrams of a concentration-difference power generation and water treatment apparatus according to an embodiment of the present invention.
4 is a schematic view showing an in-situ process using the concentration-difference power generation water treatment apparatus according to another embodiment of the present invention.
5 is a schematic diagram showing an Ex-Situ process using a concentration-difference power generation water treatment apparatus according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

In addition, the same or corresponding reference numerals are given to the same or corresponding reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. For convenience of explanation, the size and shape of each constituent member shown in the drawings are exaggerated or reduced .

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

The present invention relates to an integrated concentration-type power generation water treatment apparatus capable of simultaneously generating electricity and water treatment, and more particularly, to an electrochemical-reactive wall (EK-PRB) The present invention relates to a hybrid system capable of simultaneously treating an underground water pollutant using electricity and water.

Exemplary integrated density water treatment and treatment apparatus of the present invention can use the energy produced in a reverse electrodialysis (RED) device for the operation of an electro-water permeable reaction wall (EK-PRB), without using additional energy , It is effective to continuously treat groundwater pollutants.

FIG. 4 is a schematic diagram illustrating an in-situ process using a concentration-dependent power generation and water treatment apparatus according to an embodiment of the present invention. FIG. 5 is a schematic diagram showing an Ex-Situ process using a concentration-difference power generation water treatment apparatus according to an embodiment of the present invention.

Hereinafter, the concentration difference generation water treatment apparatus of the present invention will be described in detail with reference to Figs. 2 to 5. Fig.

The concentration difference generation and water treatment apparatus 10 according to the first embodiment of the present invention includes the first and second electrodes 101 and 102, one or more first and second flow paths 200 and 210, a plurality of ion exchange membranes 300, A medium 400 and an underground water channel 500.

Referring to FIG. 2, the first electrode 101 and the second electrode 102 may be disposed to face each other at a predetermined interval.

The at least one first flow path 200 through which the high concentration solution flows and the at least one second flow path 210 through which the low concentration solution flows may be formed in the space between the first electrode 101 and the second electrode 102, Can be located on the side of the base 102.

In addition, the first flow path 200 and the second flow path 210 may be partitioned by a plurality of ion exchange membranes 300.

Here, the plurality of ion exchange membranes 300 include a cation exchange membrane 301 and an anion exchange membrane 302.

In addition, the reaction medium 400 may be filled between the ion exchange membrane 300 adjacent to the first electrode 101 and the first electrode 101.

That is, the reaction medium 400 may be filled in a predetermined region between the ion exchange membrane disposed closest to the first electrode 300 and the first electrode 300.

In addition, the groundwater channel 500 may be formed between the reaction medium 400 and the ion exchange membrane adjacent to the first electrode side.

Particularly, the groundwater channel 500 includes a groundwater inflow portion 501 through which groundwater flows and a groundwater discharge portion 502 through which groundwater is discharged.

The groundwater channel 500 connects the groundwater inflow section 501 and the groundwater discharge section 502 in a fluid-tight manner.

The groundwater containing the pollutant flows into the groundwater inflow part 501 and flows through the groundwater channel 500. After the pollutant is removed, the treated groundwater can be discharged to the groundwater discharge part 502.

Here, the groundwater channel 500 is formed between the ion exchange membrane 300 and the reaction medium 400 so that contaminants in the groundwater move to the first electrode and pass through the reaction medium 400.

Meanwhile, when the high concentration solution flows into the first flow path 200, the low concentration solution flows into the second flow path 210, and the groundwater flows into the groundwater flow path 500, the high concentration solution passing through the ion exchange membrane 300 Electricity can be produced in the first and second electrodes 101 and 102 by the difference in the concentration of the solution and the low concentration solution.

That is, the positive ions and the anions contained in the high-concentration solution selectively pass through the plurality of ion-exchange membranes 300 due to the difference in concentration with the low-concentration solution, thereby generating a potential difference between the first and second electrodes 101 and 102, .

Therefore, the first flow path 200 and the second flow path 210 are arranged alternately so that the first flow path 200 and the second flow path 210 are alternately arranged by arranging the cation exchange membrane 301 and the anion exchange membrane 302 alternately. ).

In addition, contaminants in the groundwater can be passed through the reaction medium 400 to the first electrode 101 side and can be contacted with the reaction medium by electricity generated by the concentration difference as described above.

More specifically, the concentration-difference generation and water treatment apparatus 10 of the present invention includes a main body 100 having a predetermined space portion in which first and second electrodes 101 and 102 are arranged at predetermined distances from both ends.

More specifically, the main body 100 includes a first case 100a and a first electrode 101 surrounding the second electrode 102 and a plurality of ion exchange membranes 300, a reaction medium 400, And a second case 100b surrounding the second case 500.

In particular, the first and second cases 100a and 100b may be detachably coupled.

That is, the first and second cases 100a and 100b may be modularized and detachable from each other.

The first case 100a and the second case 100b can be detachably connected to each other. By separating and replacing each module when the reaction medium exceeds the processing capacity or the life span of the reaction medium is exceeded, Maintenance and repair can be done.

For example, when the reaction medium 400 used for treating contaminants in the groundwater reaches the end of its life, only the second case 100b containing the reaction medium 400 is taken out to exchange the reaction medium, Lt; / RTI >

If a problem occurs in the ion exchange membrane, only the first case 100a including the ion exchange membrane may be taken out, and the ion exchange membrane may be replaced and then connected to the second case 100b.

The first case 100a includes a second electrode 102 and a first flow path 200 defined by a plurality of ion exchange membranes 300 and a second flow path 210.

In particular, it may include a supply portion for supplying and discharging the low-concentration solution and the high-concentration solution.

For example, the cation exchange membrane 301, the anion exchange membrane 302 and the cation exchange membrane 301 are alternately arranged in the main body 100 so that the high concentration solution flows between the cation exchange membrane 301 and the anion exchange membrane 302 And the second flow path 210 in which the high concentration solution flows between the anion exchange membrane 302 and the cation exchange membrane 301 can be formed.

Therefore, ions in the high concentration solution selectively pass through the cation exchange membrane 301 and the anion exchange membrane 302 due to the difference in concentration between the high concentration solution and the low concentration solution, thereby generating a potential difference between the first and second electrodes 101 and 102, Energy can be produced.

Here, the cation exchange membrane 301 and the anion exchange membrane 302 are alternately arranged, and the number of the cation exchange membrane 301 and the anion exchange membrane 302 may be changed appropriately depending on the type of contaminants contained in the groundwater.

For example, the cation exchange membrane 301, the anion exchange membrane 302, the cation exchange membrane 301, the anion exchange membrane 302, and the cation exchange membrane 301 are arranged in this order on the basis of the ion exchange membrane adjacent to the second electrode 301 The first flow path 200, the second flow path 210, the first flow path 200, and the second flow path 210 may be formed therebetween, but the present invention is not limited thereto.

In particular, depending on the type of contaminants contained in the groundwater, the types of ion exchange membranes adjacent to the first and second electrodes 101 and 102 can be selected and arranged.

For example, when the contaminants are cations, the ion exchange membrane adjacent to the first and second electrodes 101 and 102 is selectively disposed as an anion exchange membrane, so that the outflow of contaminants passing through the ion exchange membrane can be prevented .

On the contrary, when the contaminant is anion-rich, the ion exchange membrane adjacent to the first and second electrodes (101, 102) is selectively disposed as a cation exchange membrane, thereby preventing the contaminants passing through the ion exchange membrane .

In addition, depending on the type of reaction medium 400 to be filled in the apparatus 10 of the present invention, the types of ion exchange membranes adjacent to the first and second electrodes 101 and 102 can be selected and arranged.

In one example, if the reaction medium 400 is a metallic medium such as ZVI, to prevent contamination of the membrane by the cationic effluent of the metallic medium, the anion exchange membrane and the cation exchange membrane may be arranged side by side By arranging ion exchange membranes in the form of a bipolar electrode, it is possible to prevent membrane contamination and to operate the apparatus for a long time.

Here, the kind of the ion exchange membrane means a cation exchange membrane or an anion exchange membrane.

In addition, the second case 100b adjacent to the first electrode 101 side includes the first electrode 101, the groundwater flow path 500, and the reaction medium 400.

As described above, it is possible to induce electricity production on the side of the first case 100a. In the second case 100b, pollutants in the groundwater flowing into the groundwater flow path 500 are discharged from the reaction medium 400 to contact the pollutant and to treat the pollutant.

Therefore, there is no need to use additional energy to treat contaminants contained in the groundwater, and at the same time, it is possible to produce electric energy.

The main body 100 of the present invention further includes a high concentration solution supply unit 110 for supplying a high concentration solution to the first flow path 200.

The apparatus further includes a low concentration solution supply unit 120 for supplying the low concentration solution to the second flow path 210.

Here, the low-concentration solution includes, but is not limited to, groundwater, soil water, and fresh water containing pollutants.

The high-concentration solution includes, but is not limited to, saline and sea water.

In addition, the high concentration solution discharging unit 111 and the low concentration solution discharging unit 121 are further included to discharge the high concentration solution diluted in concentration and the low concentration solution having increased in concentration as they pass through the plurality of ion exchange membranes 300 do.

The low concentration solution supply part 120 and the discharge part 121 are connected to the second flow path 210 and the fluid supply part 110. The high concentration solution supply part 110 and the discharge part 111 are connected to the first flow path 200 in fluid- And is movably connected.

Here, in discharging the high-concentration solution and the low-concentration solution supplied for producing electricity, the pump can be connected to the high-concentration solution discharge unit 111 and the low-concentration solution discharge unit 121 and discharged.

The main body 100 of the present invention constructed as described above may have a closed structure in order to have a predetermined space. At this time, on both sides of the main body 100, a groundwater inflow portion 501 And the discharge portion 502, some regions may have an open structure, but are not limited thereto.

The treatment process of the pollutants contained in the groundwater using the concentration-difference power generation water treatment apparatus having the above-described structure will be described with reference to FIG.

For reference, FIG. 3 uses the reference numerals in FIG. 2, and thus the description thereof will be omitted.

First, the groundwater containing the contaminants flowing through the groundwater inflow section 501 flows through the groundwater channel 500. At this time, the concentration difference between the high concentration solution and the low concentration solution supplied to the first case 100a side Electricity is produced at the first and second electrodes 101 and 102. [

At this time, the contaminants contained in the groundwater by the generated electricity are passed through the reaction medium 400 filled between the groundwater passage 500 and the first electrode 101, The groundwater, which has been treated by the reduction reaction and from which the pollutants have been removed, is discharged to the groundwater discharge unit 502.

That is, the concentration-difference power generation water treatment apparatus 10 of the present invention produces electricity by the difference in concentration between the high-concentration solution and the low-concentration solution as described above, and the ion- Moving around the reaction medium, allowing the contaminants to contact the reaction medium and treat the contaminants.

 Here, the first and second electrodes 101 and 102 include a porous electrode made of carbon.

The first and second electrodes 101 and 102 are configured to emit the electrochemical potential energy formed by the movement of the ions between the electrodes to the current, 10) can be treated in the groundwater.

Here, the porous electrode may be a porous carbon material group composed of carbon felt, carbon cloth, activated carbon, surface-modified activated carbon, graphite, carbon nanotube, and carbon nanowire; Or a carbon composite material group composed of at least one selected from the group consisting of carbon felt, carbon cloth, activated carbon, surface-modified activated carbon, graphite, carbon nanotube, and carbon nanowire; The present invention is not limited thereto, and any conventional porous electrode can be used.

Here, the porous electrode may mean an electrode having a porous surface structure.

Particularly, the porous electrode is a carbon composite material. In addition to electrodes having a porous surface structure, spherical electrodes or amorphous particulate electrodes are arranged or filled in a three-dimensional structure in a three-dimensional structure in an electrode structure space to form an electrode structure having a wide specific surface area can do.

Generally, there is a limit to the amount of ions moving through an ion exchange membrane in a reverse electrodialysis (RED) device, that is, the amount of current generated by the movement of ions.

However, in order to overcome this problem, the apparatus 10 of the present invention uses a porous electrode of carbon material arranged or filled in a three-dimensional structure as the first and second electrodes 101 and 102 as described above, Can be improved.

That is, the contact time and the contact area of the ground water in contact with the respective electrodes 101 and 102 can be maximally increased, and the treatment rate of the pollutant can be improved. In addition, as the first and second electrodes 101 and 102 and the reaction medium 400, a catalyst that reacts effectively to the treatment of a specific pollutant can be used.

For example, nitrate nitrogen can be effectively reduced by using zero valence iron, which is effective in the reduction treatment of nitrate nitrogen, in a reducing electrode or a medium to treat nitrate nitrogen which is pollutant present in groundwater.

In addition, the first case 100a and the second case 100b of the body 100 of the present invention may be detachable from each other.

Therefore, by separating and replacing the second case 100b from the first case 100a when the reaction medium 400 exceeds the treatment capacity or the life of the reaction medium 400 has expired, the concentration difference generation and water treatment apparatus 10 of the present invention, Maintenance and repair of the apparatus can be effectively performed.

In addition, the pollutants to be treated using the concentration-dependent water treatment apparatus 10 of the present invention include organic pollutants, polyvalent cation pollutants, anionic pollutants, and mixed materials thereof.

More specifically, the organic contaminants are selected from the group consisting of TCE (trichlorethylene), PCE (perchlorethylene), xylene, toluene, methyl alcohol, dichloromethane, ethyl acetate, methyl ethyl ketone, N, Butane and the like, and the polyvalent cation contaminants include heavy metals, hexavalent chromium, manganese, lead, arsenic and the like, and the anionic contaminants may include nitrate nitrogen and the like, but are not limited thereto.

Particularly, the kind of the pollutant may be classified according to a treatment method of the pollutant, and the pollutant may be oxidized or reduced.

That is, when the contaminant contained in the groundwater is an organic contaminant, it can be oxidized, and in the case of a polyvalent cation contaminant or an anion contaminant, it can be reduced.

Accordingly, when the pollutants contained in the groundwater are organic pollutants to be oxidized, the organic pollutants contained in the groundwater are moved to the oxidizing electrode side by disposing the oxidation electrode (anode) as the first electrode 101, The organic contaminants can be electrochemically oxidized.

On the contrary, when the pollutants contained in the groundwater are polyvalent cation contaminants and anion pollutants which are subjected to the reduction treatment, by disposing a reducing electrode (cathode) as the first electrode 101, Electrochemical reduction can be performed by moving to the electrode side and coming into contact with the reaction medium.

In addition, the high-concentration solution to be supplied to the concentration-gradient power generation water treatment apparatus 10 of the present invention includes solutions containing salts, seawater, salt water, conductive high molecular compounds, nanostructures, micellar surfactants, But is not limited thereto.

More specifically, the high-concentration solution may include a solution containing salts having a charge dissolved in water, seawater containing NaCl and the like, and brine as an electrolyte having electroconductivity.

Particularly, in order to prevent contamination of the groundwater in the groundwater treatment, the high-concentration solution has a limited movement through the ion-exchange membrane, and a conductive polymer or compound thereof charged in water, a nanostructure such as a dendrimer having a charge on the surface, Cationic or anionic surfactants of the micelle structure, and mixtures thereof.

Further, the low-concentration solution can use ground water or ground water treated through the concentration-dependent water treatment apparatus 10 of the present invention.

In addition, the reaction medium may include a mixture of iron and iron compounds such as zero valence iron, nano-zirconium iron, and slag, and may be combined with an adsorbent such as activated carbon or zeolite or a conductive polymer or a nanomaterial A modified conductive adsorbent, and a modified conductive adsorbent, and at least one of them, but is not limited thereto.

Meanwhile, the first and second electrodes 101 and 102 may be an anode or a cathode.

More specifically, when the first electrode 101 is an anode, the second electrode 102 may be a cathode, and when the first electrode 101 is a cathode electrode, And the second electrode 102 may be an anode.

Particularly, if the first electrode 300 is an anode, contaminants may move to the first electrode by the electricity generated by the difference in concentration, and may be processed through the oxidation reaction.

On the other hand, if the first electrode 300 is a cathode, contaminants may move to the first electrode due to the electricity generated by the difference in concentration, and may be processed through the reduction reaction.

In particular, when the first electrode 300 is a reducing electrode, Zero Valent Iron may be used as an anode material.

More specifically, when the first electrode 300 is a reducing electrode, zero valence iron can be used as an anode material for the purpose of electrochemical treatment of nitrate nitrogen or a chlorine-based organic compound.

At this time, by using zero valence iron, zero valence iron can participate in the reaction to increase the reduction treatment rate of a specific pollutant, and it is possible to reduce the overall maintenance cost by utilizing waste resources (slag, etc.) containing iron.

Reaction 1: Fe <-> Fe + 2 + 2e-

Reaction 2: R-Cl + 2e- + H + <-> R-H + Cl-

In the above Reaction Schemes 1 and 2, it can be seen that the chlorine-based organic compound of R-Cl is converted into the non-toxic form of R-H type, and similar mechanism can reduce the arsenic and nitrate nitrogen in the reducing condition.

In the meantime, the concentration-difference power generation water treatment apparatus 10 of the present invention is installed in the ground below the ground where the contaminated groundwater flows, and treats the pollutants or ex- It can be pumped and processed externally.

Therefore, the second embodiment in which the concentration difference generation and water treatment apparatus 10 is installed under the ground (In-Situ) and the third embodiment in which the processing is performed externally (Ex-Situ) will be described, The same reference numerals are used for the same parts as in the first embodiment, and a description thereof will be omitted.

First, with reference to Fig. 4, the concentration difference generation water treatment apparatus 20 according to the second embodiment of the present invention will be described.

The concentration difference power generation water treatment apparatus 20 includes an inlet 601 and an outlet 602 and a wall 600 having a predetermined space between the inlet 601 and the outlet 602.

The wall 600 is disposed perpendicularly to the groundwater flow so that the groundwater can flow in and out.

Particularly, a part of the wall 500 includes an open area where groundwater flows in a natural submerged state according to groundwater flow, and purified water is discharged.

More specifically, one side surface 601a of the wall 500 is formed with a groundwater inflow port 601 through which the groundwater flows into the natural descending shape, and the other side surface 602a is formed with a groundwater discharge port (602) may be formed.

The groundwater inflow and outflow ports 601 and 602 may be formed of a mesh-type plate or the like to prevent infiltration of the aquifer into the soil and the groundwater, but the present invention is not limited thereto.

In addition, the lower surface 603 of the wall 600 may be formed in a clogged structure to prevent contaminated materials from being discharged to the adjacent soil according to the groundwater flow.

That is, the groundwater inflow port 601 and the discharge port 602 may be a partial area of the one side surface 601a and the other side surface 602a, or may be formed as the entire area.

The first electrode 101 and the second electrode 102 are disposed in a predetermined space of the wall 600 so as to face each other with a predetermined distance therebetween.

In addition, one or more first flow paths 200, which are located on the second electrode 102 side of the space between the first electrode 101 and the second electrode 102 and through which the high concentration solution flows, And a second flow path 210.

And a plurality of ion exchange membranes 300 for partitioning the first flow path 200 and the second flow path 220.

And a reaction medium 400 filled between the ion exchange membrane 300 adjacent to the first electrode 101 and the first electrode 101.

And a groundwater flow path 500 formed between the reaction medium 400 and the ion exchange membrane 300 adjacent to the first electrode 101 side.

Here, the groundwater channel 500 may be submerged below the groundwater level L flowing into the wall body 600.

Particularly, the inflow portion 501 of the groundwater passage 500 may be provided so as to be submerged below the groundwater level L.

Here, the groundwater level refers to the uppermost water surface of the introduced groundwater.

By disposing the groundwater flow path 500 so as to be submerged below the ground water as described above, the groundwater can be introduced into the dense difference water treatment apparatus provided in the wall 600 in a natural submerged form according to the flow of the groundwater, It is possible to reduce the energy required for the use of the pump.

In particular, since the groundwater is naturally flowed by the head of the groundwater, the flow of the fluid into the apparatus 10 can be minimized by adding an initial predetermined amount of suction head while maintaining the natural flow of the groundwater as it is. It is possible to introduce groundwater into the reaction medium.

That is, by adding an initial predetermined amount of suction head at the discharge part 502 side using the siphon phenomenon, the power of the pump necessary for introducing the groundwater into the apparatus 10 can be saved.

Accordingly, the pollutants contained in the groundwater flowing into the natural submerged structure can be treated, and the purified groundwater can be discharged to the outside of the wall body 600.

Next, the concentration difference generation water treatment apparatus 30 according to the third embodiment of the present invention will be described.

The concentration-differentiated power generation water treatment apparatus 30 includes an inlet port 701 through which groundwater flows and a wall body 700 having a predetermined space for collecting groundwater.

More specifically, the wall 700 is a water collecting facility for collecting ground water. The wall 701 has an inlet 701 at least partially opened to allow the natural water to flow in accordance with the flow of the groundwater, (702) has a clogged structure to collect the inflowed groundwater.

Here, the lower surface 703 of the wall 700 may also have a clogged structure.

Further, the groundwater inflow port 701 may be a part of the one side surface 701a, or may be formed as a whole area.

One side 701a of the wall 700 may prevent the aquifer from flowing into the soil and the like, and may be formed of a mesh-shaped plate or the like so that the groundwater can move. But is not limited thereto.

In addition, a groundwater pumping channel 710 is provided to pump groundwater collected in a predetermined space of the wall 700.

In addition, the first electrode 101 and the second electrode 102 are provided outside the predetermined space and are disposed to face each other with a predetermined gap therebetween.

In addition, one or more first flow paths 200, which are located on the second electrode 102 side of the space between the first electrode 101 and the second electrode 102 and through which the high concentration solution flows, And a second flow path 210.

And a plurality of ion exchange membranes 300 for partitioning the first flow path 200 and the second flow path 210.

And a reaction medium 400 filled between the ion exchange membrane 300 adjacent to the first electrode 101 and the first electrode 101.

And a groundwater flow path 500 formed between the reaction medium 400 and the ion exchange membrane 300 adjacent to the first electrode 101 side.

Here, the groundwater pumping passage 710 and the groundwater passage 500 are fluidly connected.

As described above, the groundwater supplied from the groundwater pumping passage 710 can be treated through the concentration-dependent power generation and treatment apparatus, treated with contaminants, and then introduced into the aquifer.

Further, the groundwater treated as described above may be supplied to the low-concentration solution supply unit 120 and used as a low-concentration solution.

The first and second electrodes of the concentration-gradient electric power generation and treatment apparatus 10 of the present invention having the above-described structure are arranged such that the arrangement of the cation exchange membrane and the anion exchange membrane provided therein and the arrangement of the cation exchange membrane and the anion exchange membrane, Depending on the concentration of each solution flowing in the two flow paths, the shape of the first and second electrodes (oxidizing electrode or reducing electrode) can be changed.

For example, as shown in Fig. 1, a cation exchange membrane and an anion exchange membrane are alternately disposed between the first electrode and the second electrode of the present invention, a high concentration solution flows through the first channel adjacent to the second electrode side, The first electrode may be an oxidizing electrode and the second electrode may be a reducing electrode when the low concentration solution alternately flows.

Therefore, the shape of the first and second electrodes (the oxidizing electrode or the reducing electrode) can be changed by the shape of the ion exchange membrane disposed adjacent to each electrode side and the concentration of the solution flowing through the flow path defined by the ion exchange membrane.

Meanwhile, according to one embodiment of the present invention, the precipitated contaminants can be recovered through the reduction reaction.

More specifically, among the pollutants, the polyvalent cation-containing substances are reduced and converted to metal substances, so that the pollutants precipitated between the reaction media 400 are separated from the second case 100b and chemically or electrochemically Recovered, and, if desired, recovered metal materials may be used as the reaction medium.

Thus, efficient processing becomes possible.

10, 20, 30: concentration difference power generation water treatment device
100:
101: first electrode 102: second electrode
110: high concentration solution supply part 111: high concentration solution discharge part
120: low concentration solution supply part 121: low concentration solution discharge part
200: first flow path 210: second flow path
301: Cation exchange membrane 302: Anion exchange membrane
400: reaction medium
500: ground water flow
501: groundwater inflow section 502: groundwater discharge section
600: wall 601: inlet
602: Outlet port 603: Lower surface of the wall
700: Wall
701: Inlet port 710:

Claims (15)

A first electrode and a second electrode arranged to face each other at a predetermined interval;
At least one first flow path in which the high concentration solution flows and at least one second flow path in which the low concentration solution flows, the second flow path being located on the second electrode side of the space between the first electrode and the second electrode;
A plurality of ion exchange membranes for partitioning the first flow path and the second flow path;
A reaction medium filled between the ion exchange membrane and the first electrode adjacent to the first electrode side; And
And a groundwater flow path formed between the reaction medium and the ion exchange membrane adjacent to the first electrode side. The method according to claim 1,
When the high-concentration solution flows into the first flow path, the low-concentration solution flows into the second flow path, and the groundwater flows into the groundwater flow path,
Wherein the first and second electrodes generate electricity by a difference in concentration between the high concentration solution passing through the ion exchange membrane and the low concentration solution. 3. The method of claim 2,
Wherein the pollutants in the groundwater are oxidized or reduced by contact with the reaction medium by electricity generated by the concentration difference. A wall having an inlet and an outlet, and a predetermined space between the inlet and the outlet;
A first electrode and a second electrode arranged to face each other at a predetermined interval in a predetermined space portion;
At least one first flow path in which the high concentration solution flows and at least one second flow path in which the low concentration solution flows, the second flow path being located on the second electrode side of the space between the first electrode and the second electrode;
A plurality of ion exchange membranes for partitioning the first flow path and the second flow path;
A reaction medium filled between the ion exchange membrane and the first electrode adjacent to the first electrode side; And
And a groundwater flow path formed between the reaction medium and the ion exchange membrane adjacent to the first electrode side. A wall having an inlet for introducing groundwater and a predetermined space for collecting groundwater;
A groundwater pumping passage provided to pump groundwater collected in a predetermined space portion;
A first electrode and a second electrode provided outside the predetermined space and arranged to face each other at a predetermined interval;
At least one first flow path in which the high concentration solution flows and at least one second flow path in which the low concentration solution flows, the second flow path being located on the second electrode side of the space between the first electrode and the second electrode;
A plurality of ion exchange membranes for partitioning the first flow path and the second flow path;
A reaction medium filled between the ion exchange membrane and the first electrode adjacent to the first electrode side; And
And a groundwater flow path formed between the reaction medium and the ion exchange membrane adjacent to the first electrode side,
A groundwater pumping channel and a groundwater channel are fluidly connected. 5. The method of claim 4,
The wall is disposed perpendicularly to the groundwater flow, and the groundwater is inflowed and discharged. The method according to claim 6,
The groundwater channel is provided to be submerged below the groundwater level flowing into the wall. The method of claim 3,
Wherein the pollutant comprises at least one pollutant selected from the group consisting of an organic pollutant, a polyvalent cation pollutant, an anionic pollutant, and a mixture thereof. The method according to claim 1,
Wherein the high concentration solution comprises at least one selected from the group consisting of a solution containing salts, seawater, brine, a conductive polymer compound, a nanostructure, a micelle structure surfactant, and a mixture thereof. . The method of claim 3,
Wherein the first electrode is an oxidation electrode and oxidizes the organic pollutants in the groundwater. The method of claim 3,
Wherein the first electrode is a reduction electrode and reduces the multivalent cation contaminants and anionic contaminants in the groundwater. 12. The method of claim 11,
(Zero Valent Iron) is used as the electrode material of the reduction electrode. 12. The method of claim 11,
And recovering the precipitated contaminants through the reduction reaction. 5. The method of claim 4,
Wherein the low-concentration solution is groundwater introduced into the groundwater channel. The method according to claim 1,
A first case surrounding the second electrode and a plurality of ion exchange membranes; And
Further comprising a second case surrounding the first electrode, the reaction medium and the groundwater flow,
And the first and second cases are detachably coupled to each other.

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