KR100801185B1 - The method of electrolysis system for sea-water, freshwater and waste-water using precision switching rectifier - Google Patents

Abstract

A method and an apparatus for electrolysis of seawater, freshwater and wastewater using a precision switching rectifier are provided to desorb and remove deposit from surfaces of the electrodes by generating an oxidation or reduction reaction according to opposite electric potential of electrodes' electric potentials in an electro-deposit interface layer, thereby converting the electro-deposit interface layer into ions or hydrates that can easily dissolve the electro-deposit interface layer into water. A method for electrolysis of seawater, freshwater and wastewater using a precision switching rectifier comprises: a setting step(S10) of setting up upper and lower limit values of control variables; an electrolysis step(S20) of performing electrolysis by constant current; a first monitoring step(S30) of comparing the control variable with the set upper limit value while conducting the electrolysis step; an upper limit value reaching determination step(S40) of determining if the control variables reach the upper limit value in a process of performing the first monitoring step; an inverse current applying step(S50) of applying an inverse current to electrodes if the control variables reach the upper limit value in the upper limit value reaching determination step; a deposit removing step(S60) of removing deposit deposited on the electrodes by applying the inverse current to the electrodes in the inverse current applying step; a second monitoring step(S70) of comparing the control variable with the set lower limit value while conducting the deposit removing step; a lower limit value reaching determination step(S80) of determining if the control variables reach the lower limit value in a process of performing the deposit removing step and the second monitoring step; and a constant current applying step(S90) of applying a constant current to the electrodes if the control variables reach the lower limit value in the lower limit value reaching determination step.

Description

The method of electrolysis system for sea-water, freshwater and waste-water using precision switching rectifier}

1 is a block diagram of an electrolytic treatment apparatus using a precision inversion rectifier according to the present invention.

Figure 2 is a process flow diagram for the electrolytic treatment process to remove the electrodeposition by applying a reverse current in accordance with the present invention.

Figure 3 is an embodiment in which the effect of when the electrodeposition of the electrode due to the application of reverse current in the electrolysis of sea water according to the present invention periodically removed and preventing the insulatorization compared with the case of using a general DC rectifier Reference also indicates.

Figure 4a is a reference diagram showing the deconduction of the negative electrode when using a common DC rectifier.

FIG. 4B is a conceptual diagram showing the effect when non-conduction is prevented by using a precision switching rectifier capable of applying reverse current. FIG.

<Description of the symbols for the main parts of the drawings>

10: electrolyzer 11: inlet

11a: pump 12: outlet

13 fastening member 14 gasket

15: cathode member 15a: cathode boot bar

16 flange 17 anode member

17a: Anode bus bar 20: Precision switching rectifier

21: computer

The present invention can solve the problem of stopping the electrolysis process due to the voltage rise due to electrodeposition generated during electrolysis and electrode insulator, the electrolysis method using a precision switching rectifier and the electrolysis processing apparatus that enables continuous operation. More specifically, in the electrolysis treatment system of water in which electrodeposits are produced, the electrodeposits are removed by applying a reverse current for a predetermined period of time at regular intervals to remove the electrodeposits without chemically or mechanically damaging the electrode. The present invention relates to an electrolytic treatment method and apparatus for removing complexes to enable continuous operation without process interruption.

Electrolytic treatment of seawater and fresh water using an electrolysis system has been applied for various purposes in various fields. In the case of seawater, chlorine gas, hydrogen gas and caustic soda water are obtained as primary products through electrolytic treatment, and these are used as major industrial raw materials. In addition, if the electrolysis is continued while maintaining the pH at 6.5 ~ 10, chloric acid (hypochlorite) and hypochlorite (hypochlorite) can be obtained as a product, which is used for sterilizing microorganisms in seawater. Fresh water can also be used for sterilization to prevent drinking water and green algae by artificially adding chlorine ions to generate hypochlorous acid through electrolysis. In addition, many technologies have recently been applied to decompose hardly decomposable organic substances by treating wastewater and domestic wastewater generated in industrial production, barns, etc., or to purify water by decomposing nitrogen and phosphorus compounds.

As such, the electrolytic treatment method is applied as an effective method for electrolyzing seawater and fresh water or industrial wastewater to produce products required in each process or to decompose harmful substances.

However, electrolytes such as seawater, freshwater, and wastewater to which the electrolytic treatment is applied include not only ions capable of obtaining a desired product or harmful substances for decomposition, but also other inorganic ions, light metal ions, and suspended solids having a charge. These are present, and during electrolysis, deposition occurs toward the electrode at a potential opposite to the respective charges, thereby forming a deposit on the surface of the electrode.

Electrodeposits formed on the surface of the electrode reduce the catalytic efficiency of the electrode surface, the voltage is increased by changing the oxidation-reduction potential, excessive power consumption and consequently exothermic heat occurs, and the load on the catalyst electrode also increases the electrode life It can also cause shortening.

In addition, when the electrodeposited material is a nonconductor having little conductivity, the voltage rises at a high speed, and thus, a continuous electrolysis process is often impossible. In this case, stop the operation and perform acid pickling process to dissolve and remove the electrodeposited material by adding strong acid chemical such as hydrochloric acid, or remove the electrodeposited material by mechanical method such as brushing or sanding. This becomes a factor that makes continuous process operation difficult and can cause chemical and mechanical damage to the electrode, which also affects electrode life.

Currently, seawater electrolytic treatment facilities in power plants, etc., separate the pickling process to remove the scale generated at the cathode, stop the electrolytic treatment at regular intervals, and pickle the entire electrolyzer. Doing. This not only hinders continuous process operation, but also negatively affects the lifetime of the electrode and corrosion of the entire electrolytic facility as a strong acid is added.

Therefore, in order to remove the electrodeposits generated during the electrolysis process, it is necessary to develop a method capable of removing the electrodeposits without stopping the continuous process operation and removing the electrodeposits without chemical and mechanical damage to the electrodes.

As described above, the electrodeposited electrode is produced when electrochemically electrolyzing seawater, fresh water, and wastewater in which various metals and inorganic ions are dissolved in water, and are dissolved in water. Various metal ions, inorganic ions and suspended solids are charged on the electrode with the opposite potential during the electrolysis process to increase the voltage of the electrolytic reactor and reduce the current, making it difficult to continuously maintain the continuous operation. In addition, during the constant current electrolytic treatment, excessive load due to voltage increase may provide a cause of shortening of electrode life.

In order to solve the problems described above, in each electrolysis treatment process such as seawater, fresh water and waste water, electrodeposits are formed which interfere with the electrolysis treatment process, resulting in interruption of the continuous process, deterioration of electrode performance, and electrode lifetime. Electrodeposition layer formed on the interface between the electrodeposited material and the electrode by applying a reverse current using a precision switching rectifier capable of applying reverse current for a predetermined period of time at a predetermined cycle for an electrolysis process in which By causing oxidation or reduction reaction according to the reverse potential of the electrode potential in the electrode (electro-deposit interface layer), the electrodeposition interface layer is converted into ions or hydrates which can be easily dissolved in water, and the electrodeposited substance is desorbed from the electrode surface. It is intended to be removed.

In the electrolytic treatment method for removing the electrodeposition by applying the reverse current of the present invention for achieving the above object, the setting step (S10) and the setting step (S10) of setting the upper limit value and the lower limit value of the control variable; Electrolysis step (S20) for performing electrolysis by a constant current, the first monitoring step (S30) and the first monitoring step (S30) for comparing the set upper limit while performing the electrolysis step (S20) Control during the process An upper limit value determination step (S40) of determining whether the upper limit value of the variable is reached, a reverse current application step (S50) of applying a reverse current when the control variable reaches an upper limit value in the upper limit value determination step (S40), and the reverse current Comparing the lower limit value of the control variable set in the process of the electrodeposition removal step (S60) and the electrodeposition removal step (S60) is carried out by applying a reverse current by the applying step (S50) In the process of the second monitoring step (S70), the electrodeposition removing step (S60) and the second monitoring step (S70) proceeds to determine the lower limit value reaching step (S80), When the control variable reaches the lower limit in the lower limit value determination step (S80), it is characterized in that the electrostatic treatment in a constant current applying step (S90) for applying a constant current.

As another feature of the present invention, the reverse current applying step (S50), the electrodeposition removal step (S60) and the constant current application step (S90) is the current of the negative electrode (-) and the positive electrode (+) by the precision switching rectifier 20 Apply alternating flow.

As another feature of the present invention, the reverse current application step (S50), the electrodeposition removal step (S60) and the constant current application step (S90) is applied current, applied voltage, application period, application time, temperature of the electrolyzer, electrolyte concentration Control the precision switching rectifier 20 using the computer 21.

In the electrolytic treatment device of seawater, fresh water and wastewater of the present invention, a pump 11a is provided at an inlet 11 through which the seawater, freshwater and wastewater are introduced, and an outlet 12 is provided at an opposite side of the inlet 11. The upper and lower portions of the inlet 11 and the outlet 12 are coupled to each other by the fastening member 13, and the first gasket 14a and the cathode member 15 are disposed between the inlet 11 and the outlet 12. The second gasket 14b, the flange 16, the third gasket 14c, the positive electrode member 17, and the fourth gasket 14d are formed as one unit, and a plurality of them are continuously coupled to each other. An electrolytic cell 10 connected to a cathode booth bar 15a and the anode member 17 is connected to a cathode booth bar 17a; A precision switching rectifier 20 connected to one side of the negative electrode bus bar 15a and the positive electrode bus bar 17a, respectively; And a computer 21 connected to the precision switching rectifier 20.

1 is a block diagram of an electrolytic treatment apparatus using a precision inversion rectifier according to the present invention. Figure 2 is a process flow diagram for the electrolytic treatment process to remove the electrodeposition by applying a reverse current in accordance with the present invention. Figure 3 is an embodiment in which the effect of when the electrodeposition of the electrode due to the application of reverse current in the electrolysis of sea water according to the present invention periodically removed and preventing the insulatorization compared with the case of using a general DC rectifier Reference also indicates. Figure 4a is a reference diagram showing the deconduction of the negative electrode when using a common DC rectifier. FIG. 4B is a conceptual diagram showing the effect when non-conduction is prevented by using a precision switching rectifier capable of applying reverse current. FIG.

Hereinafter, the components will be described with reference to the drawings.

1 is a block diagram of the electrodeposition removal decomposition treatment apparatus according to the reverse current application method according to the present invention, the electrolytic cell 10 is an inlet 11 for introducing seawater and wastewater through the pump (11a), and On the opposite side of the inlet 11 is provided with an outlet 12, which discharges the reacted seawater and wastewater and freshwater, and discharges the discharged seawater and wastewater and freshwater, which is then connected to another inlet (10). The seawater and wastewater and fresh water are introduced into the container 11, and the upper and lower portions between the inlet 11 and the outlet 12 are joined to each other by the fastening member 13, and the first gasket 14a and the cathode member 15 are connected to each other. ), The second gasket 14b, the flange 16, the third gasket 14c, the positive electrode member 17, and the fourth gasket 14d are sequentially inserted to form a unit and mounted in a row. The negative electrode member 15 and the positive electrode member 17 are respectively the negative bus bar 15a and the positive bus bar 17a. A switching rectifier 20 is connected to one side of each of the negative electrode bus bar 15a and the positive electrode bus bar 17a, and is configured as a computer 21 connected to control the switching rectifier 20. do.

The first gasket 14a, the second gasket 14b, the third gasket 14c, and the fourth gasket 14d are electrodes in which the cathode member 15 and the anode member 17 come into contact with each other. To prevent a short, that is, a short circuit, the flange 16 is the first gasket 14a, the negative electrode member 15, the second gasket 14b and the third gasket 14c, the positive electrode member 17, It is provided between the fourth gasket (14d) so that the negative electrode member 15 and the positive electrode member 17 is maintained at a constant interval.

The precision switching rectifier 20 alternately applies the current flow of the negative electrode (-) and the positive electrode (+) for a predetermined time period at regular intervals. As a result, the electrodeposition interface layer of the electrodeposited substance generated at the time of constant current application is converted into ions which are easily dissolved in water, thereby acting to remove the electrodeposited substance.

The precision switching rectifier 20 may be controlled by the computer 21 and may be programmed by controlling the constant current, constant voltage, reverse current, reverse voltage, constant current application time, reverse current application time, temperature, electrolyte concentration, and the like. In this way, it is possible to induce electrodeposition by optimizing the setting of the operating conditions controlled by the computer 21.

FIG. 2 shows that electrodepositions that interfere with the electrolysis process are formed, and thus, for the electrolytic treatment process that cannot perform continuous electrolysis treatment, continuous process operation is possible by applying reverse current to remove the electrodeposits. Process steps for the implementation of the reverse current application electrolytic treatment, characterized in that it will be described as follows.

The setting step (S10) of setting the upper and lower limit values of the control variable is a step in which the operator inputs and sets the upper and lower limit values of the control variable by using the computer 21. First, continuous electrolytic treatment process is continued by forming electrodeposition material. In general, the control variable is set to prevent the voltage from being applied to the electrolyzer, and may also include a constant current application time, a decrease in applied current, a decrease rate and concentration reduction in the desired product, and an amount of electrodeposited electrode. The upper limit and the lower limit of the complex variables combined with AND or OR Logic of these control variables can be set continuously.

Next, after the setting step S10, the electrolytic treatment process is performed by the constant current electrolysis step S20 that performs electrolysis by the constant current through the switching rectifier 20.

While performing the electrolysis step (S20) through the first monitoring step (S30) for comparing the set upper limit value by the computer 21, while reading the values for these control variables at regular intervals, the upper limit value determination step (S40) Determine whether the upper limit value is reached by the computer 21, and when the control variable reaches the upper limit value, the computer 21 performs a reverse current application step S50 instructing the precision switching rectifier 20 to apply reverse current. The reverse current is applied to the electrolytic cell 10. The reverse current is applied to the negative electrode member 15 and the positive electrode member 17 through the negative electrode bar 15a and the positive electrode bar 17a connected to the switching rectifier 20. Applied to proceed to the electrodeposition removal step (S60) to remove the electrodeposited on the negative electrode member 15 and the positive electrode member 17, which is continuously applied to the negative electrode member 15 and the positive electrode member 17 Electrodeposits are generated by the constant current, and when the control variable reaches the limit value, the computer 21 instructs the command to apply the reverse current to the precision switching rectifier 20, thereby applying the reverse current by the switching rectifier 20. By performing the process to remove the electrodeposited on the negative electrode member 15 and the positive electrode member 17.

That is, when reverse current flows by the switching rectifier 20, the negative electrode and the positive electrode applied to each of the negative electrode member 15 and the positive electrode member 17 at the constant current are reversed by the reverse current and the positive electrode current is negative to the negative electrode member 15. Flows and a cathode current flows through the anode member 17 so that the electrodeposited material deposited on the cathode member 15 and the anode member 17 is converted into ions, and the electrodeposited material dissolved in seawater or wastewater and fresh water is removed. .

In the process of removing the electrodeposited substance by the reverse current (S60), the second monitoring step (S70) is performed to check whether the lower limit is compared and reached by the computer 21 of the set control variable, which is the switching rectifier. In the process of removing the electrodeposited material by applying reverse current at 20, the values for the control variables are similar to those of the first monitoring step S30. In the lower limit value determination step (S80), the threshold value of the opposite position, that is, the lower limit value is reached, while being monitored through the applied voltage, the application period, the application time, the temperature of the electrolyzer, and the electrolyte concentration. You will be confirmed.

When the control variable reaches the lower limit in the course of the electrodeposition removal step (S60) and the second monitoring step (S70), the cathode boot bar in the precision switching rectifier 20 by the control signal of the computer 21 The electrolytic treatment process is performed by applying a constant current to the electrolytic cell by applying a constant current to the electrolytic cell by applying a constant current to the cathode member 15 and the anode member 17 through a constant current through the anode boot bar 17a. Will be re-executed.

By repeatedly performing the above steps it is possible to continue the operation of the continuous process while removing the electrodeposition without interrupting the electrolytic treatment process.

[Example]

Looking at the embodiment of the electrodeposition removal electrolytic treatment apparatus by applying a reverse current according to the present invention.

Figure 3 is an embodiment comparing the effect of when the electrodeposition of the electrode due to the application of reverse current in the electrolysis of the sea water according to the present invention to prevent the non-conducting periodically compared to the case of using a general DC rectifier A reference road, As shown in FIG. The current continuously applied in one direction causes the electrode to become nonconductor due to the continuous generation of Ca and Mg scales at the cathode. As a result, the voltage continuously increases when the current density is kept constant at 0.025 A / cm ² . have. As a result of the voltage increase, the maintenance cost is increased due to excessive power consumption due to a high voltage, and when the voltage continuously increases and exceeds the threshold voltage, continuous operation is impossible and damage is caused to the anode and cathode electrodes. In addition, there is a problem that the heat generated by the increased resistance is intensified to discharge the treated water of a high temperature affecting the environment.

On the other hand, as shown in (b) of Figure 3 using the precision switching rectifier 20, the positive electrode and the negative electrode is crossed for 3 to 5 minutes at the interval of 7 hours as a result of applying a reverse current all electrodeposits deposited on the electrode when applying a constant current It has been removed, and the operating voltage range is maintained at 3-4V stably, which solves all the problems caused by the above-mentioned voltage rise, and it is possible to continue operation while maintaining the stability of the electrode by preventing excessive electrodeposition. .

[Comparative Example]

Figure 4a is a reference diagram showing the negative conduction of the negative electrode when using a general DC rectifier, Figure 4b is a conceptual diagram showing the effect of preventing the non-conducting by using a precision switching rectifier that can apply a reverse current, the fluid The ions such as calcium and magnesium dissolved in the electrode are deconducted at the same time as the electrode is electrodeposited and the applied current-voltage changes rapidly. For example, the power efficiency drops rapidly at the proper operating current during constant current operation. The reaction load is considerably increased and thus the lifetime of the electrode is also reduced.

An example of a representative electrolysis process in which the electrodeposition is formed is the electrolysis process of seawater. Seawater uses an electrolysis process to obtain chlorine, hydrogen and caustic soda as a product or to sterilize by generation of hypochlorous acid.In seawater, metal theory such as calcium (Ca) and magnesium (Mg) and inorganic ions are used. Is dissolved, and at the time of electrolysis the reaction at the cathode of these ions is

Cathodic Reaction: Ca ^{2 +} , Mg ^{2 +}  + 2e ^-  → Ca, Mg (Insoluble)

This causes a reduction reaction at the cathode to form a scale, and at the same time to insulate the electrode to increase the voltage applied as shown in Figure 4a, due to the scale formed on the cathode, the applied voltage to the required amount of current continuously As a countermeasure, the process for removing the scale should be added to the entire electrolysis process. As a solution for this, the current flow between the anode and the cathode is constant as shown in FIG. 4B. Each cycle, reverse current is applied to an electrode potential at an electrodeposition interface layer formed at the interface between the electrodeposited electrode and the electrode by applying a reverse current using a precision switching rectifier capable of applying reverse current for a predetermined time. By causing the oxidation or reduction reaction according to this electrodeposited interfacial layer is easy to water as The reaction scheme is to convert the electrodeposits from the electrode surface by converting them into soluble ions.

Reversal of Cathode: Ca, Mg Scale-> Ca ^{2 +} , Mg ^{2 +}  + 2e ^-

Becomes That is, during electrolysis of seawater, in the case of the cathode, the scale of Ca, Mg, etc., which caused the insulatorization, was converted to the anode for a predetermined time using a precision switching rectifier. such as Ca ^{2 +,} Mg ^{2 +} ion is converted to an easily soluble in water, Since the solution is dissolved, the scale generated as shown in FIG. 4B is desorbed and used again as a normal cathode.

In addition, the electrodeposited interfacial layer that dissolves when the reverse current is applied corresponds to only a two-dimensional surface that is a part of the generated scale lump, and thus, the reverse current is applied only for a very short time compared to the constant current applied time applied during the scale generation. Even if this is done, the electrodeposition interface layer is dissolved, and once the electrodeposition interface layer is dissolved and loses the adhesive force, the scale is forced to convex in accordance with the flow of the flow rate and is released out of the electrolytic reactor.

In particular, in the case of seawater in which bivalent light metal is dissolved in high concentration, it is possible to operate at stable current-voltage through removal of electrodeposited material by applying reverse current, and optimize the setting of operating conditions by programming reverse current application cycle and application time. Doing so can lead to electrodeposition.

Thus, the use of the electrodeposition removal electrolysis system according to the application of reverse current according to the present invention, seawater electrolysis equipment such as power plants and ballast water electrolytic treatment sterilization apparatus of ships, sterilization apparatus, light metal and Drinking water containing metal ions (ground water), wastewater containing light metals and metal ions, various ionized water devices, desalination of sea water, devices installed in storage tanks containing drinking water for electrolytic disinfection, devices using electrolytic flotation electrodes, Special Purpose Used for electrode scale desorption and red tide prevention and sterilization of seawater used as industrial water.

While the invention has been shown and described with respect to particular embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention as set forth in the appended claims. Anyone can grow up easily.

As described above, the present invention removes electrodeposits of the electrodes generated by applying a constant current-voltage reverse current periodically in the electrolytic treatment process, thereby interrupting the process operation due to the conventional method, deteriorating electrode performance, and electrode. By improving and controlling problems such as damage to life and heat generation, it overcomes the increase in resistance due to the interference of the electrolytic treatment process caused by the formation of electrodeposits.

In addition, the application of the electrodeposition removal electrolysis treatment system by applying reverse current includes seawater electrolysis facilities such as power plants, ballast-water electrolysis sterilization of ships, desalination facilities of seawater, sewage and water purification Sterilization and disinfection equipment in treatment plants, drinking and ground water containing light metals and metal ions, waste water containing light metals and metal ions, various ionized water devices, devices installed in storage tanks containing electrolytic disinfection drinking water, electrolytic flotation electrodes Equipment, special purpose electrode scale desorption field, seawater red tide prevention and sterilization equipment.

Claims (4)

In the electrolysis treatment method of applying a reverse current to remove the electrodeposition, A setting step (S10) of setting an upper limit value and a lower limit value of a control variable; An electrolysis step (S20) for performing electrolysis by a constant current after the setting step (S10), A first monitoring step S30 for comparing the upper limit value of the set control variable while performing the electrolysis step S20; Control in the process of the first monitoring step (S30) An upper limit value determination step (S40) of determining whether the upper limit value of the variable is reached; A reverse current application step (S50) of applying a reverse current when the control variable reaches an upper limit value in the upper limit value determination step (S40), An electrodeposition removal step (S60) of removing the electrodeposited electrode on the electrode by applying a reverse current by the reverse current applying step (S50); A second monitoring step S70 of comparing the lower limit values of the control variables set in the process of removing the electrodeposition material S60; A lower limit value determination step (S80) of determining whether a control variable reaches a lower limit value during the electrodeposition removal step (S60) and the second monitoring step (S70); Electrolytic treatment method of seawater, fresh water and wastewater using a precision switching rectifier characterized in that it comprises a constant current applying step (S90) for applying a constant current when the control variable reaches the lower limit value in the step of determining the lower limit value (S80). The method of claim 1, The reverse current application step (S50), the electrodeposition removal step (S60) and the constant current application step (S90) is applied by alternating the current flow of the negative electrode (-) and the positive electrode (+) by the precision switching rectifier 20 Electrolytic treatment of seawater, fresh water and wastewater using a precision switching rectifier. The method of claim 1 or 2, wherein the reverse current application step (S50), the electrodeposition removal step (S60) and the constant current application step (S90), The operating conditions for the applied current, the application period, the application time, the temperature of the electrolyzer, and the electrolyte concentration in the reverse current application step (S50), the electrodeposition removal step (S60), and the constant current application step (S90) are stored in the computer 21. The electrolytic treatment method of seawater, fresh water and wastewater using a precision switching rectifier, which is programmed, and the precision switching rectifier (20) is controlled by the computer (21) to control the operating conditions of each step. In the electrolytic treatment apparatus of seawater, fresh water and wastewater, A pump 11a is provided at an inlet 11 through which the seawater, fresh water and waste water are introduced, and an outlet 12 is provided at an opposite side of the inlet 11, and upper and lower portions of the inlet 11 and the outlet 12 are provided. Are coupled to each other by the fastening member 13, and the first gasket 14a, the negative electrode member 15, the second gasket 14b, the flange 16, the first between the inlet 11 and the outlet 12 The three gaskets 14c, the positive electrode member 17, and the fourth gasket 14d are formed as one unit, and a plurality of the gaskets 14 are continuously coupled to each other, and the negative electrode member 15 is connected to the negative electrode bus bar 15a. The anode member 17 includes an electrolytic cell 10 connected to the anode booth bar 17a; A precision switching rectifier 20 connected to one side of the negative electrode bus bar 15a and the positive electrode bus bar 17a, respectively; A computer (21) connected to the precision switching rectifier (20); Electrolytic treatment device of seawater, fresh water and wastewater using a precision switching rectifier, characterized in that it comprises a.

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