KR100953085B1 - Sewage water and waste water treating system using capacitive deionization - Google Patents

Abstract

PURPOSE: A waste water treatment system using a capacitive deionization method is provided to improve treated water quality by removing various ionic substances in processing water of a MBR process. CONSTITUTION: A waste water treatment system using a capacitive deionization method comprises the following: a former anaerobic tank(10) and a SBR reaction tank(20); a film reactor(30) removing a solid material in processing water using a film(31) pore; a CDI reaction tank(40) including a capacitive deionization stack(41) formed with a porous active carbon electrode layer, and a power unit(42); and an oxidizer generating unit(50) supplying oxidizer for removing an organic compound adsorbed to an electrode of the capacitive deionization stack.

Description

Sewage and Wastewater Treatment System using Capacitive Deionization {SEWAGE WATER AND WASTE WATER TREATING SYSTEM USING CAPACITIVE DEIONIZATION}

In the present invention, in the process of treating wastewater, anion is adsorbed on the positive electrode and cations move on the negative electrode to charge each other by using electrical characteristics between the carbon electrodes, thereby effectively removing dissolved inorganic ions contained in the water. The present invention relates to a wastewater treatment system using an electricity storage deionization method.

In Korea, the water shortage is serious and we are reducing and relying on the available water resources. We are planning to re-use wastewater such as wastewater treatment water for various purposes. As a result, the research and application cases of recycling process and system using effluent from sewage treatment plant and wastewater treatment plant are increasing every year, but the situation is still weak.

In order to reuse such effluent water, it is necessary to remove suspended solids, viruses, dissolved solids, hardly decomposable substances, odors, and colors in the effluents.

In addition, according to the Enforcement Rules of the Water Quality and Ecosystem Conservation Act, the effluent water quality of treatment plants treating urban wastewater, sewage, manure, and factory wastewater is regulated, and each treatment plant removes contaminants from the influent to remove the water quality of the effluent. Appropriate treatment methods will be in place to meet appropriate standards.

In the treatment method, several processes are combined step by step according to the intention of the designer to form a treatment method, and the process includes biological, chemical, and physical treatment processes, and the applied principles and methods are different from each other.

In the biological treatment process, it is difficult to remove high-concentration organic matter and effective removal of total nitrogen (TN) and total phosphorus (TP) through the conventional biological treatment process. The direction of technology development is being promoted with the reactor process.

The advantage of the MBR process is that it is possible to maintain a high MLSS concentration to increase the organic treatment efficiency, and by using a micro-pore size membrane to facilitate the removal of large particulate matter such as turbidity of the treated water and E. coli to improve the treated water quality There is an advantage.

However, there is a problem that the total phosphorus (TP) of the reaction solution is also rapidly increased as the MLSS concentration is maintained in the reactor. According to current laws, regulations on total nitrogen (TN) and total phosphorus (TP) concentrations of treated water are tightened day by day, so it is possible to effectively remove total phosphorus (TP) component from the treated water treated through the MBR process. Skill is required.

Representative techniques for removing total phosphorus (TP) through physical and chemical treatment processes are known, such as the adsorption process using porous adsorbents such as activated carbon and zeolite, and the coagulation precipitation process using iron oxides or aluminum salts of various oxides. have. However, in the above-mentioned two processes, the removal and regeneration of the adsorbent is not easy, and a large amount of sludge is generated, and the maintenance of the adsorbent is not easy, and the amount of consumable chemicals used through continuous administration of the adsorbent and flocculant is high. There is a problem.

As a method for compensating the above-mentioned problems, methods such as electrocoagulation or ion exchange resin method and electrophoresis using an ion exchange membrane have been proposed, but this also has low processing efficiency and periodic replacement of insoluble iron or aluminum electrodes used for electrocoagulation. Secondary contaminants may be generated by the use of excess acid or basic cleaning solution for the regeneration of ion exchange resins.

Therefore, the problem to be solved by the present invention is to combine the MBR process and CDI process technology with high organic decomposition efficiency and excellent ability to remove particulate contaminants, to remove various ionic substances contained in the treated water of the MBR process to improve the treated water quality It is an object of the present invention to provide a wastewater treatment system using an electricity storage deionization method that can be improved.

In addition, there is another object to provide a waste water treatment system using the de-ionization method, which is less pollution, energy-efficient than the conventional deionization process, and can reduce the management cost.

In addition, another object of the present invention is to provide a wastewater treatment system using a capacitive deionization method capable of minimizing or preventing contamination of activated carbon electrodes by organic materials in a CDI process.

The wastewater treatment system using the electricity storage deionization method according to the problem to be solved of the present invention is a wastewater treatment system including a process for removing nitrogen and phosphorus in the organic matter of the wastewater, which is provided with a pre-aerobic tank and an SBR reaction tank. A treatment system comprising: a membrane separation tank for removing solid matter in treated water from the total anaerobic tank and the SBR reaction tank by separation membrane pores; In order to adsorb the ionic component of the membrane treated water in which the ionic component is dissolved in communication with the membrane separation tank, a storage deionization stack composed of a porous activated carbon electrode layer and a power supply unit for applying current to the storage deionization stack are provided. CDI reactor; And an oxidant generator for communicating with the CDI reactor and generating an oxidant for removing organic substances adsorbed to the electrodes of the electrical storage deionization stack, and supplying the oxidant to the CDI reactor.

In this case, the CDI reactor may be configured in plural and communicate with each other, and each valve may be provided to receive an oxidant from the oxidant generating unit individually at its front end.

The plurality of CDI reactors may be configured in a parallel or series or parallel series structure.

The plurality of CDI reaction tanks may be provided with ion measuring means, respectively, at the front end of the treated water from the membrane separation tank.

The plurality of CDI reaction tanks may be provided with ion measuring means respectively at the rear end of the discharged water.

According to an embodiment of the present invention, the ion content of the effluent discharged from each CDI reactor is determined through the data collected in connection with the ion measurement means, and the oxidant is supplied by controlling the valve of the corresponding CDI reactor according to a predetermined value. And a controller for blocking.

At this time, the control unit is a display unit for quantifying and displaying the ion content of the effluent discharged from each CDI reactor, and if the ion content measured from the ion measuring means is relatively higher than a predetermined value to inform the cleaning of the corresponding CDI reactor Alarm means may be provided.

On the other hand, according to an embodiment of the present invention, the separation membrane in which the solid material is separated through the membrane separation tank is accommodated, and the membrane cleaning tank for cleaning the separation membrane in communication with the oxidant generating portion; may be further configured to include.

At this time, the membrane cleaning tank may be provided with a valve for controlling the supply of the oxidant at the front end.

On the other hand, the CDI reaction tank of one configuration of the present invention may be one in which each electrode of the electrical storage deionization stack has a plurality of laminated structures at predetermined intervals.

In addition, the oxidant generating unit of one configuration of the present invention may be to generate NaOCl or CLO2 oxidant by an electrochemical oxidation method.

At this time, the oxidant generating unit may further include a mixing means for supplying the mixed NaOCl and CLO2 oxidant.

Finally, the pore of the separator described above may be composed of 0.1 to 0.01 ㎛.

As described in detail above, the wastewater treatment system using the capacitive deionization method according to the present invention does not require shortening of electrode life due to continuous elution and periodic replacement of the electrode, by applying capacitive deionization technology. In order to reduce the management cost by applying a small voltage of 1.2 ~ 2.0V to the activated carbon electrode has an economic advantage.

In addition, by combining the MBR process and CDI process technology with high decomposition efficiency of organic matter and the ability to remove particulate contaminants, the TP (total phosphorus) removal ability, which is a disadvantage of the conventional MBR process, is complemented, and the NBR process as well as nitrate and phosphate ions are treated. All ionic materials having charges such as fluoride, chloride, and sulfate ions present in water can be removed, thereby improving the treated water quality.

In addition, the oxidant generating unit generating the oxidant has an advantage of minimizing the phenomenon of contamination of the activated carbon electrode by the organic material by applying the oxidant used in the film cleaning process to the CDI process in connection with the film cleaning tank and the CDI reaction tank.

In addition, the oxidant generating unit can effectively remove the organic matter adsorbed on the activated carbon electrode even during the desorption process in the CDI process by being linked to the plurality of CDI reaction tanks. The CDI reactor, which is capable of removing ions and is installed at the rear stage, has the advantage of effectively reducing or minimizing the high concentration ion concentration produced in the CDI process by reprocessing the ion concentrate water discharged from the desorption process of the CDI reactor at the front end. .

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a view for explaining the wastewater treatment system using the power storage deionization method of the present invention, Figure 2 shows the configuration of the wastewater treatment system using a power storage deionization method according to a first embodiment of the present invention 3 is a view showing the configuration of the wastewater treatment system using the power storage deionization method according to the second embodiment of the present invention, Figure 4 is a power storage deionization method according to a third embodiment of the present invention It is a figure which shows the structure of the used waste water treatment system.

5 is a side cross-sectional view showing a first embodiment of a power storage deionization stack of one configuration of the present invention, and FIG. 6 is a side cross-sectional view showing a second embodiment of a power storage deionization stack of one configuration of the present invention. 7 is a view for explaining an experimental example according to a first embodiment of the present invention.

According to the waste water treatment system using the electricity storage deionization method according to the present invention, in the process of treating waste water, waste water, nitrogen, phosphorus, etc. in the organic matter, the total anaerobic tank 10 and the continuous batch activated sludge reactor (hereinafter, 'SBR reactor) 20).

The removed treated water passes through the membrane separation tank 30 to remove solids in the treated water, and by using electrical properties between activated carbon electrodes, negative ions are adsorbed on the positive electrode and positive ions move on the negative electrode to charge each other. It will effectively remove the dissolved inorganic ions contained in.

First, the present invention flows into the SBR reaction tank 20 in communication with the pre-anaerobic tank 10 through the pre-anaerobic tank 10 as shown in FIG. 1, wherein the pre-anaerobic tank 10 is carried out. Between the and the SBR reactor 20 is provided with a liquid transfer stirring device (not shown) to stir the internal liquid of the reaction vessel and to return the treated water treated in the SBR reactor 20 to the total anaerobic tank 10 It is desirable to repeat the process.

As a result, the SBR reactor 10 repeats anaerobic and aerobic processes as time passes, and effectively removes and discharges nitrogen and phosphorus in organic matter included in the wastewater.

On the other hand, the organic matter is removed from the SBR reactor 20 above about 98% (BOD basis), the membrane separation tank 30 is in communication with the rear end of the SBR reactor 20 in the ion adsorption performance of the activated carbon electrode The solid material (SS) affecting is almost completely removed through the pore separation membrane 31 of 0.1 ~ 0.01㎛.

Here, the membrane separation tank 30 uses the MBR (Membrane Bio Reactor) method. Briefly describing the MBR method, the membrane separation tank 30 is present in the wastewater according to the pore size (several to several tens of micrometers) and the surface charge of the membrane. It is a high separation process that can be almost completely separated and removed, such as organic, inorganic pollutants and microorganisms to be treated has various advantages over the conventional activated sludge process.

The treated water passing through the membrane separation tank 30 is then removed from the dissolved inorganic ion in the CDI reaction tank 40 in communication with the membrane separation tank 30. The CDI reactor 40 includes a capacitive deionization stack 41 having a hydrophilic porous activated carbon electrode layer therein.

The capacitive deionization stack 41 of the CDI reactor 40 uses capacitive deionization, which will be described in detail with reference to FIGS. 5 to 6.

The capacitive deionization method is a technique in which an electric driving force is added to a conventional adsorption and ion exchange mechanism, which utilizes high electrical conductivity and adsorption capacity of a carbon body, and is characterized by easy desorption and regeneration of an electrode adsorbent by simple potential reversal. have.

In addition, by forming a porous carbon electrode in the form of a stack (stack) is a technology for removing the salt of the inorganic ion contained in the water. This method is less contaminated than ion exchange, reverse osmosis, electrodialysis and evaporation.

In addition, the energy consumed in the desalination process of brackish water by the reverse osmosis method is generally about 2.3KWh / ㎥, whereas in the desalination process of brackish water by the deionization method, about 0.05 to 0.1KWh / ㎥ As it is known to consume a degree of energy, the power storage deionization method is an economical technology that is energy-efficient and costs are reduced.

First, the principle of the capacitive deionization stack 41 is a layer of hydrophilic porous carbon electrodes 400 and 410 in which anion and cation contained in the water constitute the capacitive deionization stack 41 as shown in FIG. 5. When passing through, by applying a trace voltage of about 1.0 to 2.0 V to the porous carbon electrodes 400 and 410, the inorganic ions in the medium by using the electrical properties between the dissolved inorganic ions and the carbon electrode contained in the water Adsorption removes.

For example, an anion such as Cl ⁻ is adsorbed to the anode 400 by an electrostatic force between the two carbon electrodes 400 and 410, and a cation such as Na ⁺ is transferred to the cathode 410. By charging with each other, the inorganic ions in the water are effectively removed.

In addition, the ionic components charged and adsorbed on the positive electrode 400 and the negative electrode 410 do not apply current or apply reverse current to the ionic components adsorbed on the electrode after the adsorption operation to remove the ionic components in the water. Drain with medium.

Thus, unlike the iron or aluminum electrode used in the electrocondensation process, the activated carbon transfer of the above-described capacitive deionization stack does not require shortening of the electrode life due to continuous elution and periodic replacement of the used electrode. In order to reduce the maintenance cost, the power supply to the activated carbon electrode is used in a small amount of 1.2 ~ 2.0V has an economic advantage.

Meanwhile, according to another embodiment of the power storage deionization stack, which is one configuration of the present invention, the power storage deionization stack 41 may be configured such that fluids freely move in the electrodes 400 and 410 therein, as shown in FIG. 6. It may be composed of a plurality of laminated structures by the spaced or spaced porous spacer 420.

That is, the capacitive deionization stack 41 is disposed between the plurality of electrodes spaced apart from each other, and is disposed between the plurality of positive electrodes 400 which are modified to be hydrophilic to which + power is applied, and the plurality of positive electrodes, and − power is applied. The negative electrode 410 is modified to be hydrophilic.

As a result, a plurality of electrodes are stacked and positive and negative voltages are alternately applied to the electrodes, whereby positive and negative ions in the influent are more efficiently absorbed and desorbed on the electrode surface.

Here, the CDI reactor 40 further includes a power supply unit 42 for applying direct current power to the plurality of positive electrodes 400 and the negative electrodes 410 constituting the storage deionization stack 41.

At this time, the positive electrode 400 and the negative electrode 410 is made of carbonaceous materials such as activated carbon, graphite, carbon airgel electrode and carbon composite electrode, and the following electrical adsorption and desorption reactions occur as power is applied.

Anode: X ^{m +} -> X ^{m +} Adsorption / Carbon Electrode

A negative electrode ^{(cathode): Y n - -} > Y n - Adsorption / Carbon Electrode

X: Cationic ions such as Na ⁺ , K ⁺ , Ca ^{2 +} , MG ^{2 +} (Metal ions)

_{^{Y: PO 4 3 -, Cl}} -, SO 4 2 -, NO 3 - anion acids such as

m: the number of electrons of the cation used for the reaction

n: the number of electrons of the anion used in the reaction

Meanwhile, according to a preferred embodiment of the present invention, the oxidizer generator 50 is connected to the CDI reactor 40 to remove organic substances adsorbed to the electrodes 400 and 410 inside the storage deionization stack 41. It includes more.

The oxidant generating unit 50 generates and supplies NaOCl or CLO2 oxidant by an electrochemical oxidation method, or further includes a mixing means 70 to mix NaOCl and CLO2 oxidant as shown in FIG. It is supplied to the CDI reactor 40.

Therefore, the organic material adsorbed to the activated carbon electrode can be effectively removed during the desorption process of the power storage deionization process of the CDI reaction tank 40 through the oxidant supplied from the oxidizer generator 50.

On the other hand, Figure 7 is a view for explaining an experimental example according to an embodiment of the present invention, it is shown the change in the electrical conductivity of the water passing through the power storage deionization stack.

[Experimental Example]

This experimental example is an experimental example shown in the result of the discharged water treated from the above-described MBR process is introduced into the CDI reactor and treated according to the CDI process, that is, the change in the electrical conductivity with respect to the passage water and the analysis result for the anion.

First, according to the present experimental example, the inflow water flowing into the CDI reactor is treated water treated in the SBR reactor and the membrane separation tank, the BOD of the influent is 4.8ppm, the electrical conductivity is 530㎲ / ㎝, the influent pH is 7.34pH, CDI The storage deionization stack activated carbon electrode area of the reactor was tested under the conditions of 100 cm 2, influent feed flow rate 20ml / min, adsorption time 3min, desorption time 2min, and electrode supply current 1.2V / 1.5V.

7 shows the results of three repeated experiments with adsorption 3 min and desorption 2 min processes, and the electrical conductivity rapidly decreased from the initial 530 ㎲ / cm during adsorption time of 180 s (3 min) to about 54 s. After the reduction to ㎲ / cm, the amount of ion adsorption on the surface of the activated carbon electrode was saturated, and thus the amount of ion adsorption on the surface of the activated carbon electrode began to decrease. Accordingly, the conductivity removal rate gradually decreased, and the electrical conductivity was reduced at 180 s (3 min). Increased to about 104-154 kV / cm.

After 180 sec (3 min), the current supply was cut off and desorption was carried out for 2 min until 300 s. The electrical conductivity of the eluate was rapidly desorbed and the electrical conductivity of the eluent was desorbed. Conductivity drops to about 660 dl / cm. After that, the adsorption process was performed by supplying a current to the activated carbon electrode again, and the electrical conductivity of the eluate was decreased to 60 mW / cm again after 300 s (5 min), and 800 s ( 8 min) and then desorption again.

As described above, according to the results of this experimental example, the conductivity removal rate was not significantly different between 1.2 V and 1.6 V, and the average salt removal rate was 67-72% even under a small amount of voltage supply (1.2 to 1.6 V). .

On the other hand, Table 1 is an analysis result of the anion of the treated water treated through the CDI process, the ion chromatograph (IC) analysis of the effect of removing the anion component of the treated water eluted in the adsorption step of the CDI treatment process . The concentrations of Nitrite and Phosphate ions in the influent flowing into the CDI reactor were 49.9 ppm and 2.58 ppm, respectively, but the concentrations of Nitrite and Phosphate ions in the treated water eluted during the adsorption step performed under 1.2 V and 1.5 V It was found that Nitrite and Phosphate ions were effectively removed at about 11.604 ~ 12.79 ppm and 1.126 ~ 1.303 ppm, and other anions such as fluoride were also effectively removed at least 50%.

ANIONS concentration (ppm) Fluoride chloride Nitrite Sulfate Phosphate CDI Inflow 0.446 70.622 49.900 3.683 2.580 1.2V supply conditions 0.290 26.078 12.788 0.589 1.303 1.5V supply conditions 0.256 17.845 11.604 0.487 1.126

As described above, according to the wastewater treatment system using the electricity storage deionization method of the present invention, by combining the MBR process and the CDI process technology with high decomposition efficiency of organic matter and excellent ability to remove particulate contaminants, TP ( It can easily solve the problems of physical and chemical treatment process for total phosphorus removal and TP removal, and it has charges such as Fluoride, Chloride, Sulfate ion in MBR process water as well as Nitrate and Phosphate ions. All ionic substances can be removed, thus improving the treated water quality up to recycled water quality.

The above-described experimental example is an example for explaining the result that the effluent treated from the MBR process is treated through the CDI reactor, and the present invention is not limited to the above-described experimental example.

On the other hand, Figure 3 is a view showing the configuration of the wastewater treatment system using the power storage deionization method according to a second embodiment of the present invention, referring to Figure 3 the CDI reactor 40 is composed of a plurality of communication with each other It can be seen that.

Specifically, the CDI reactor 40 is configured in plural and communicate with each other, preferably, as shown in FIG. 3, the CDI reactor 40 is configured in a parallel series structure in which parallel and series are mixed.

In addition, it is reasonable that the CDI reactor 40 may be configured in a parallel or series structure.

In addition, a plurality of valves 60 are provided at the front end of the plurality of CDI reactors 40 and 40 ′ so that the oxidant may be individually supplied from the oxidant generator 50.

As described above, as the CDI reactor 40 is configured in plural, the ion desorption stack is alternately performed by alternately performing adsorption and desorption processes, as well as the storage deionization stack of the CDI reactor 40 'installed at the rear end ( 41 ') can effectively reduce or minimize the high concentration of ion concentrations generated in the CDI process by reprocessing the ion concentrate water discharged from the desorption process of the capacitive deionization stack 41 of the two CDI reactors 40 installed at the front end. It becomes possible.

In the present embodiment, as shown in Figure 3 further comprises a membrane cleaning tank (80) in communication with the oxidant generating unit (50). The membrane cleaning tank 80 receives a separator 31 in which solid materials are separated, and receives an oxidant from the oxidant generator 50 to perform a cleaning process of the separator 31.

In other words, the membrane cleaning tank 80 is a space for cleaning the separation membrane 31 and is used for a predetermined period of time in the separation membrane 31 in which the solid material is separated from the membrane separation tank 30, that is, the solid material is adsorbed. The separation membrane 31 is moved to the membrane cleaning tank 80 to perform the cleaning process of the separation membrane 31 accommodated in the membrane cleaning tank 80 through the oxidant of the oxidant generating unit 50.

At this time, the film cleaning device 80 also includes a valve 60 for controlling the amount of the oxidant supplied from the oxidant generator 50 at the front end thereof. That is, the valve 60 adjusts the amount of the oxidant or cuts off the supply of the oxidant.

Meanwhile, according to the third embodiment of the present invention, the plurality of CDI reaction tanks 40 are provided with ion measuring means 100 and dissolved in the inflow water flowing into the CDI reaction tank 40 and the outflow water treated through the CDI reaction tank 40. Inorganic ions can be measured.

Referring to FIG. 4, the plurality of CDI reaction tanks 40 are provided with ion measuring means 100 at the front end to which the treated water from the membrane separation tank 30 flows into each CDI reaction tank 40. Provide the dissolved inorganic ion content in the operator.

In addition, the plurality of CDI reaction tanks 40 are each provided with ion measuring means 100 at the rear end of the discharged treated water. The ion measurement means 100 measures the dissolved inorganic ion content in the effluent treated in each CDI reactor 40, and provides the operator with the measured inorganic ion content to the operator, so that the operator de-ionizes each CDI reactor 40. The degree of efficiency of the stack 41 can be expected.

That is, in the process of repeating adsorption and desorption of the activated carbon electrodes 400 and 410 of the deionization stack 41, the adsorption amount is saturated while the adsorption amount is saturated due to fine ions not removed from the surface thereof. Therefore, the desorption efficiency of the deionization stack 41 is gradually reduced.

The ion measuring means 100 is used as a means for informing the operator of the timing of cleaning the activated carbon electrodes 400 and 410 of the deionization stack 41 to compensate for the above-mentioned problems, and the operator may use the corresponding CDI reactor. Opening the valve 60 provided at the front end of the 40 to clean the activated carbon electrodes 400 and 410 of the electrical storage deionization stack 41 through an oxidant, thereby increasing the efficiency of deionization.

Meanwhile, in the present embodiment, the controller 90 may be included to automatically process the above-described process.

Specifically, the control unit 90 is connected to the ion measuring means 100 provided in each of the plurality of CDI reaction tank 40 is discharged from each CDI reaction tank 40 through the data collected from each ion measuring means 100 Determine the ion content of the outflow water.

In addition, the controller 90 controls the valve of the CDI reactor 40 according to a predetermined value to supply and block the oxidant.

Herein, the predetermined value corresponds to a time that requires cleaning of the activated carbon electrodes 400 and 410, and quantifies the dissolved inorganic ion content in the effluent and compares it with the predetermined value, and compares it with the predetermined value. If it is relatively high, it is determined that the efficiency of the activated carbon electrode (400, 410) is reduced to open the valve of the CDI reactor 40 to clean the activated carbon electrode (400, 410) through an oxidant.

In addition, the control unit 90 is provided with a display unit for displaying the numerical value of the inorganic ion content of the influent water flowing into each CDI reaction tank 40 and the effluent water discharged from each CDI reaction tank 40. In addition, when the dissolved inorganic ion content in the effluent measured from the ion measuring means 100 is relatively higher than a predetermined value, an alarm means for informing the cleaning of the corresponding CDI reactor 40 is provided.

As described above, the ion measuring means 100 may grasp the components of the dissolved inorganic ions of the effluent treated in each CDI reactor 40 to predict the efficiency of the activated carbon electrodes 400 and 410, and the controller 90 By the control of the valve 60 provided in each CDI reaction tank 40 is opened, it is possible to wash the activated carbon electrodes (400, 410) is reduced efficiency.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view for explaining a wastewater treatment system using the present invention power storage deionization method.

2 is a view showing the configuration of the wastewater treatment system using the electricity storage deionization method according to the first embodiment of the present invention.

3 is a view showing the configuration of the wastewater treatment system using the electricity storage deionization method according to the second embodiment of the present invention.

4 is a view showing the configuration of a wastewater treatment system using a power storage deionization method according to a third embodiment of the present invention.

Fig. 5 is a side sectional view showing a first embodiment of a power storage deionization stack of one configuration of the present invention.

6 is a side cross-sectional view showing a second embodiment of a power storage deionization stack of one configuration of the present invention.

7 is a view for explaining an experimental example according to a first embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: all anaerobic tank 20: SBR reactor

30 membrane separation tank 31 membrane

40: CDI reactor 41: storage deionization stack

42: power supply unit 50: oxidant generating unit

60 valve 70 mixing means

80: film cleaning tank 90: control unit

100: ion measurement means

Claims (13)

delete In the wastewater treatment system, which includes a step of removing nitrogen and phosphorus in organic matters of the wastewater, which is provided with a pre-aerobic tank and an SBR reaction tank and flows in, Membrane separation tank for removing the solid matter in the treated water to be treated from the total anaerobic tank and SBR reaction tank by the membrane pores; In order to adsorb the ionic component of the membrane treated water in which the ionic component is dissolved in communication with the membrane separation tank, a storage deionization stack composed of a porous activated carbon electrode layer and a power supply unit for applying current to the storage deionization stack are provided. CDI reactor; And And an oxidant generator for communicating with the CDI reactor and generating an oxidant for removing organic substances adsorbed to the electrodes of the storage deionization stack and supplying the oxidant to the CDI reactor. The CDI reactor is composed of a plurality of communication with each other and the front end of the wastewater treatment system using the de-ionization method, characterized in that each valve is provided so as to receive the oxidant from the oxidant generating unit individually. 3. The method of claim 2, The plurality of CDI reactor is a waste water treatment system using the de-ionization method, characterized in that the parallel or series or parallel series structure. 3. The method of claim 2, The plurality of CDI reaction tank is a wastewater treatment system using an electrostatic deionization method, characterized in that each ion measuring means is provided at the front end of the treated water flows from the membrane separation tank. 3. The method of claim 2, The plurality of CDI reaction tank is a wastewater treatment system using a power storage deionization method, characterized in that each ion measuring means is provided at the rear end of the effluent discharge. The method of claim 5, A control unit for determining the ion content of the effluent water discharged from each CDI reactor through the data collected in connection with the ion measurement means, and supplying and blocking the oxidant by controlling the valve of the CDI reactor according to a predetermined value; The wastewater treatment system using the electrical storage deionization method characterized by the above-mentioned. The method of claim 6, The control unit may include a display unit for quantifying and displaying the ion content of the effluent discharged from each CDI reactor and an alarm means for notifying the cleaning of the corresponding CDI reactor when the ion content measured from the ion measurement unit is relatively higher than a predetermined value. Waste water treatment system using the electrical storage deionization method characterized in that it comprises. delete delete 3. The method of claim 2, The CDI reactor is a wastewater treatment system using an electricity storage deionization method, characterized in that each electrode of the electricity storage deionization stack has a plurality of laminated structures at predetermined intervals. 3. The method of claim 2, The oxidant generator is a wastewater treatment system using a capacitive deionization method, characterized in that to produce NaOCl or CLO2 oxidant by an electrochemical oxidation method. The method of claim 11, The oxidant generator is a waste water treatment system using a capacitive deionization method characterized in that it further comprises a mixing means for mixing and supplying the NaOCl and CLO2 oxidant. delete

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