KR101202765B1 - Ballast water treatment apparatus and method using ferrate - Google Patents

Abstract

PURPOSE: A ballast water containing water sterilizing apparatus using ferrate and a method for the same are provided to improve the reliability of the apparatus by blocking the generation of additional pollution. CONSTITUTION: A ballast water containing water sterilizing apparatus includes a hypochlorous acid and ferrate supplying unit, a hypochlorous acid sterilizing unit(30), and a ferrate sterilizing unit(40). The hypochlorous acid sterilizing unit adds hypochlorous acid into feed water to primarily sterilize the feed water. The ferrate sterilizing unit adds ferrate into the primarily sterilized water to be secondarily sterilized. The hypochlorous acid and ferrate supplying unit includes an electrodialyzer(10) and an electrolyzer(20). The electrodialyzer is composed of an electrodialysis bath(11), an anode plate(13), a cathode(14), and a supplying pipe. The electrodialyzer collects hypochlorous acid and caustic soda. Seawater or a sodium chloride aqueous solution are introduced into the electrodialyzer. The electrolyzer generates ferrate in an electrolysis bath(21). The caustic soda is supplied into the electrolysis bath as electrolyte. [Reference numerals] (30) Hypochlorous acid sterilizing unit; (40) Ferrate sterilizing unit; (60) First sensor; (70) Second sensor; (80) PH adjusting unit-sulfuric acid, hydrochloric acid; (AA) Caustic soda(NaOH); (BB) Hypochlorous acid(HClO); (CC) Ballast water; (DD) Purified water

Description

BALLAST WATER TREATMENT APPARATUS AND METHOD USING FERRATE}

The present invention relates to an apparatus and method for sterilizing water containing ballast water using ferrite, and more particularly, to sterilizing vessel ballast water through hypochlorite and ferrate in two steps. Prevents marine pollution by the sea, prevents the scale caused by tidal-flat or metal ions, etc. contained in the seawater to occur in the electrode plate, and includes ballast water using a ferrate that can prevent secondary pollution by sterilization means A device and method for sterilizing water.

In general, ships are applied to ballast water tanks (also called "Ballast Water Tanks") to maintain stability when cargo is not loaded and to promote propulsion efficiency. The tanks are designed to reduce the center of gravity of the ship according to the loading and unloading of the cargo and to ensure safe navigation. Several tanks are provided to form a symmetrical structure on the left and right sides of the ship, and the tanks are independent so that the filled seawater does not move. .

Therefore, as the ship is repeatedly loaded and unloaded, the ballast water tank is repeatedly filled with seawater, and the process of discharging is repeated. At this time, various solids such as marine life introduced with the seawater become sediment during operation.

When suspended solids are settled, when the seawater is discharged from the ballast water tank, it is not discharged with the seawater, but accumulates on the bottom. do.

Furthermore, when loading cargo, the ballast tanks are emptied, which releases tons of water in the tanks, causing the release of pathogens, mollusks, and fish, adversely affecting the surrounding ecosystem, such as the Great Lakes. ) Has at least 185 species of foreign marine life, and ballast water has been criticized as a major cause of this influx of foreign marine life.

The ballast water as described above is inhabited by various organisms such as pathogenic bacteria and plankton contained in freshwater or seawater in the area filled with ballast water, and when it is discharged to the coast of other regions without any treatment, There is a high risk of causing serious marine pollution and ecosystem destruction.

Based on this situation, in 1996, the United States enacted the National Invasive Species Act, requiring foreign species to be intruders, requiring mandatory management and control of ballast waters, and in Australia, amended the Quarantine Law to quarantine ballast waters. It is defined as imported cargo and quarantine directly.

On the other hand, the International Maritime Organization (IMO) signed an international agreement in February 2004, and since 2009 it has been required to mount equipment necessary for the sterilization of ballast water on board ships. All ports were to be banned.

Therefore, in recent years, various technological developments have been made to treat ballast water, and representative examples thereof include sterilization and purification of ballast water using ozone (Ozone: 03) or electrolysis. Related prior arts are Patent Registration Nos. 10-769834, 10-775238, and 10-802889, respectively.

However, in the conventional ballast water treatment apparatus using ozone as described above, toxic substances such as Total Residual Oxidants (TRO) may be generated during sterilization, and these toxic substances are usually 1 to 5 days. This is not a problem for long-haul ships because it decomposes naturally over time, but it can also be a problem for emergencies in which ballast water needs to be discharged at short-range operations or when toxics are not broken down. .

In other words, if toxic substances remain in the sterilized ballast water at the time when ballast water should be discharged, it cannot be discharged until it is naturally decomposed. Depending on the seawater condition, even if left for a long time it may occur that does not decompose below the specified value.

As another method to solve this problem, the ballast water of the electrolysis method that uses the chlorine gas or hypochlorous acid (HClO or ClO-) generated through the electrolysis reaction in the vessel to kill the organisms contained in the ballast water Development of processing equipment is active.

The ballast water treatment apparatus of the electrolysis method includes a pump for introducing and pumping seawater, an electrolysis reactor for producing electrolytic water by electrolyzing seawater pumped by the ballast water pump, and electrolyzed water generated by the electrolysis reactor. It is composed of a gas separator for separating / discharging hydrogen gas in the tank, and a sterilizing water injection pump for supplying chlorine gas from the gas separator to the ballast water tank.

According to the ballast sterilization apparatus using electrolysis according to the prior art, there are the following problems.

First, since the seawater used as ballast water has a lot of metallic ions such as tidal flats, calcium, sodium, and magnesium, plating occurs on the electrode during electrolysis. have.

On the other hand, electrolysis is better to close the distance between the electrodes because the electrolysis efficiency increases as the distance between the electrodes is closer, but if the distance between the electrodes is close, the conductor foreign matter is caught between the electrodes, the short is generated. There is a limit to bringing. As a result, there is a limit in improving the electrolysis efficiency by adjusting the spacing of the electrode, so that a method of increasing the area of the electrode can be used to increase the electrolysis efficiency, but this has the disadvantage of increasing the size of the electrolyzer.

In addition, in the case of large vessels using ballast water, the moored charges in the marina is very expensive, the cost is high when the ballast water sterilization rate is slow.

Second, ships not equipped with ballast water sterilizer should be equipped with ballast water sterilizer by mandatory ship ballast water sterilizer, and there are various types of sterilizers, but the effectiveness of electrolysis ballast sterilizer The application of electrolytic ballast water sterilizer will be the most high. New dry ships do not have problems because they include the power consumption of ballast water sterilizers, but previously constructed ships do not take into account the power consumption of ballast water sterilizers (even though they are designed to include reserve power). It is not practical to have a small or no reserve power due to the power consumption of), so the ballast water sterilizer of large power consumption cannot be applied, but as mentioned in the first problem, the ballast water of the conventional electrolysis method Sterilizers are very impractical because of their high power consumption.

For reference, electrolysis is directly proportional to the magnitude of the current, and power consumption is directly proportional to the product of current and voltage. That is, in the case of a current of the same magnitude (electrolytic efficiency is directly proportional to the magnitude of the current, the output is described under the same condition by the same magnitude of current), that is, when the voltage is the same, the power consumption can be reduced. .

Third, hydrogen gas is essentially generated during electrolysis, and this hydrogen gas does not dissolve in water but is present in ballast tanks or pipes, which may cause explosion of the ship. Separator is applied.

Conventional hydrogen gas separator, for example, a hydrogen separation chamber filled with electrolytic water therein, an electrolytic water inlet connected to one end of the electrolytic water inlet pipe installed at the upper end of the other side of the hydrogen separation chamber, and one side of the hydrogen separation chamber Electrolyzed water injection pump installed on the electrolytic water injection pipe connected to the lower end, the gas discharge pipe is installed on the upper surface of the hydrogen separation chamber, the water level meter is installed on the lower side of the other side of the hydrogen separation chamber, the electrolytic water injection to be connected to the water gauge It is configured to include a water level control valve installed on the pipe.

According to the conventional hydrogen separator configured as described above, the electrolytic water is filled in the hydrogen separation chamber through the electrolytic water inlet pipe and the electrolytic water inlet, the hydrogen gas contained in the electrolytic water filled in the hydrogen separation chamber is the upper space inside the hydrogen separation chamber In other words, the electrolytic water hydrogen separation chamber does not accumulate hydrogen gas inside the hydrogen separation chamber through the gas discharge pipe which is automatically gas-liquidly separated in the space where the electrolytic water is not filled and is opened without a separate valve or device on the upper surface of the hydrogen separation chamber. Allow to be discharged to the outside.

In addition, in order to dilute the hydrogen gas in the hydrogen separation chamber, an air blower (not shown) for supplying external air into the hydrogen separation chamber is installed in the upper space where the electrolytic water of the hydrogen separation chamber is not filled. Is mixed with the hydrogen gas to dilute the hydrogen gas to reduce the risk of hydrogen gas explosion and to be discharged to the outside through the gas discharge pipe.

However, according to the conventional hydrogen separator as described above, since the hydrogen gas is separated by the specific gravity of the gas and the liquid in the hydrogen separation chamber, the separation efficiency of the hydrogen gas is lowered, and in order to dilute the hydrogen gas by the blower. By supplying external air into the hydrogen separation chamber, the external air is in direct contact with the electrolyzed water filled in the hydrogen separation chamber, thereby contaminating the electrolyzed water filled in the hydrogen separation chamber by the external air.

In addition, there is a problem that the electrolyzed water flows back to the blower due to the rocking of the electrolyzed water filled inside the hydrogen separation chamber during the external vessel operation of the hydrogen gas separator.

Republic of Korea Patent Publication No. 10-1029623 Republic of Korea Patent Publication No. 10-2011-0118871 Republic of Korea Patent Publication No. 10-2011-0023484 Republic of Korea Patent Publication No. 10-2010-120946 Republic of Korea Patent Publication No. 10-0794106

The present invention is to solve the problems as described above, by sterilizing the ballast water of the ship through hypochlorous acid and ferrate for two times to prevent marine pollution by ballast water, tidal flat or metal contained in seawater It is an object of the present invention to provide an apparatus and method for sterilizing water containing ballast water using ferrate, which prevents scale from being generated on the electrode plate and prevents secondary contamination by sterilization means.

A water sterilization apparatus including ballast water using ferrate according to the present invention includes hypochlorous acid and perate supply means for supplying hypochlorous acid and ferrate, respectively; Hypochlorous acid sterilization means for primary sterilization of the raw water by adding hypochlorous acid supplied through the hypochlorous acid and perate supply means to the raw water; And perate sterilization means for secondly sterilizing the primary treated water by adding the ferrate supplied from the hypochlorous acid and the ferrate supply means to the primary sterilized water through the hypochlorous acid sterilization means. Method for sterilizing water containing ballast water using ferrate according to the present invention, the first step of sterilizing the raw water by adding hypochlorous acid to the raw water; And a second step of adding ferrate to the first sterilized first treated water through the first step to secondly sterilize the first treated water and treating it with purified water.

According to the sterilizing apparatus and method for water containing ballast water using ferrate according to the present invention, the sterilizing power is increased by sterilizing water such as ballast water through the high oxidizing power of hypochlorous acid and ferrate to contaminate the treated water. It is possible to prevent, and also to prevent secondary contamination by the sterilization means through the characteristics of the ferrite free of its own contaminants, it is possible to improve the reliability as a sterilization device.

In addition, since the scale is not adhered to the surface of the electrode plate during electrodialysis of seawater through the insoluble platinum catalyst electrode, the electrical conductivity is maintained, thereby improving the electrolytic performance. As a result, the production rate of hypochlorous acid, caustic soda and ferrate is improved. Miniaturization and low power disinfection equipment can be produced.

1 is a conceptual view showing a sterilizing apparatus for water containing ballast water using a ferrate according to the present invention.
Figure 2 is a schematic diagram showing a sterilizing apparatus for water containing ballast water using a ferrate according to the present invention.

As shown in Figure 1, the sterilization apparatus for water containing ballast water using the ferrate according to the present invention, by using hypochlorous acid (HClO) and perate (ferrate) in two steps by using sequentially By treating raw water (water to be sterilized such as ballast water, which will be described below using ballast water as an example) with purified water, for example, continuous sterilization of ballast water flowing through the water treatment pipe 1 as an example. Explain.

Water treatment pipe (1) is an inlet is formed on one side and the discharge port is provided on the other side, for example, is installed in the supply line of ballast water.

Hypochlorous acid and ferrate may be used as a separate product, and when the present invention is used as a sterilization apparatus for ballast water, seawater may be prepared as a starting material, and it will be described using seawater as an example.

Seawater is a high salt water to produce hypochlorous acid and caustic soda (NaOH) and the like by the electrodialysis machine 10, at this time to prepare a ferrate through the electrolyzer 20 using the prepared caustic soda as a starting material. Of course, if it is not seawater, hypochlorous acid and perlate are prepared using sodium chloride and water as starting materials (using electrodialysis machine 10 and electrolyzer 20 is the same as seawater).

The electrodialysis machine 10 is a seawater containing, preferably equipped with a cation exchange membrane 12 inside the electrodialysis tank 11, the cation exchange membrane 12 in the interior of the electrodialysis tank 11, respectively mounted between And a positive electrode plate 13 and a negative electrode plate 14 to which currents (+,-) are applied. Here, the positive electrode plate 13 and the negative electrode plate 14 refer to everything having a positive electrode and a negative electrode.

The problem of the electrode in the electrodialysis process for the production of caustic soda is that the electrode is corroded by the electrolytic action in the case of the anode, the electrode is gradually consumed, in the case of the cathode magnesium hydroxide (Mg (OH) ₂ ) and the caustic substances such as calcium hydroxide (Ca (OH) ₂ ) adhere to deteriorate electrode performance and cause a fatal impediment to performance of the entire electrolytic cell due to short-circuit between the positive and negative electrode plates 13 and the negative electrode plate ( In 14, insoluble platinum catalyst electrodes are used to minimize corrosion and not to corrode well. In addition, a mesh-like structure is also possible to secure the flow rate of the sea water of a certain amount or more.

In more detail, the positive electrode plate 13 and the negative electrode plate 14 are made of a platinum group metal coated on titanium, and have an average surface roughness of 0.1 to 0.5 micrometers through surface treatment.

Seawater and groundwater are dissolved in a large amount of metallic ions such as calcium, magnesium, potassium, etc., and these metallic ions are attached to the surface of the electrode in scale during the electrolysis, and thus have low electrical conductivity. .

In more detail, the phenomenon in which the metal ions adhere to the surface of the electrode in scale during electrolysis is related to the roughness average of the electrode.

To date, the electrode used for electrolysis is OH Radical is produced at the anode when the electrolysis causes a strong oxidation action to oxidize all metals except the platinum-based metal, so coating the platinum-based metal on the metal surface such as titanium or stainless steel Since the plating method of the platinum-based metal uses the electroplating method, since the surface of the metal such as titanium or stainless is roughened for electroplating, the platinum-based metal is electroplated. The surface average roughness of is 2.0 micrometers or more. However, when the surface average roughness is 2.0 micrometers or more by conventional electroplating, a large amount of scale is attached to the electrode.

The electrode of the present invention is manufactured by using a high vacuum deposition method, the average surface roughness (Roughness average) is less than 0.5 micrometers (0.1 ~ 0.5 micrometers, preferably 0.2 micrometers) containing a large amount of metallic ions such as calcium, magnesium, potassium The scale is not attached to the surfaces of the positive electrode plate 13 and the negative electrode plate 14 when electrolyzing the purified seawater or the like.

Since the electrodialysis machine 10 having such a configuration is known to produce hypochlorous acid and caustic soda using seawater (or a mixture of sodium chloride and water) as a starting material, a detailed description thereof will be omitted. For reference, the schematic diagram of FIG. 2 is shown as a sodium chloride tank 15 and a water tank 15 to supply sodium chloride and water in each of the tanks 15 and 16.

Hypochlorous acid produced through the electrodialysis machine 10 is first supplied to the water treatment pipe 1 to sterilize the ballast water flowing along the water treatment pipe 1, and caustic soda is used as a starting material for producing ferrate. Supplied to the cracker 20.

The electrolyzer 20 is a ferrite produced by using the caustic soda prepared in the electrodialysis machine 10 as a starting material, and the inside of the electrolysis tank 21 and the electrolysis tank 21 containing the caustic soda are fixed. It consists of a positive electrode plate 22 and a negative electrode plate 23 spaced apart from each other and applied with a current (+,-), respectively, where the positive electrode plate 22 and the negative electrode plate 23 are not limited to the plate and all are possible. . Both side plates 22 and the negative electrode plate 23 are each made of iron (Fe) (coated or coated with iron).

The hypochlorous acid and perate produced by the electrodialysis machine 10 and the electrolyzer 20 may be supplied to the hypochlorous acid sterilization means 30 and the ferrate sterilization means 40 immediately after the production, respectively, and each storage tank. It can also be stored and supplied when needed.

The positive electrode plate 22 and the negative electrode plate 23 are made of iron, respectively, and when electrolyzed using caustic soda as electrolytic water, ferrate (Na-based ferrate) is produced.

The ferrate produced through the electrolyzer 20 has a redox potential of 2.18 to 2.22 V and 2.2 V in an acidic atmosphere.

Ferrate has a strong redox potential higher than ozone (2.08V) and hydrogen peroxide (1.78V) and shows strong oxidation ability, even at low concentration levels of 2ppm.

Even though the ferrate has excellent sterilization power, it is difficult to commercialize commercially because of its instability and high manufacturing cost. In the present invention, the place where the ferrate is to be used, such as ballast water sterilization (ship) The ferrite was produced directly in the) and used immediately in real time, thereby suppressing the increase in manufacturing cost by separation / purification and overcoming the decrease in efficiency due to the inevitable short life due to the instability of the ferrate itself.

Hypochlorous acid sterilization means 30 is to sterilize ballast water by supplying hypochlorous acid produced in the electrodialysis machine 10 to the water treatment tube 1, for example, the electrodialysis machine 10 and the water treatment tube ( 1) A pump for supplying hypochlorous acid produced in the hypochlorous acid supply pipe 31, the caustic soda supply pipe 32, and the electrodialysis machine 10 to the water treatment pipe 1 through the hypochlorous acid supply pipe 31, hypochlorous acid It may be configured as a valve for adjusting the opening degree of the supply pipe (31).

The ferrate sterilization means 40 sterilizes the primary treated water by adding ferrate to the primary sterilized water through the hypochlorous acid sterilization means 30 to electrolytic bath 20 and the water treatment tube 1 Pump to feed the water treatment pipe (1) through the ferrate supply pipe (41) by pumping the ferrate produced through the electrolysis of the electrolyzer (20) and the ferrate supply pipe (41) connecting the ferrite supply pipe ( 41) is composed of a valve for adjusting the opening degree.

The present invention is characterized in that sterilized ballast water in two stages using hypochlorous acid and ferrate at a time difference, and each manufacturing process or mechanical connection structure will be easily implemented by those skilled in the art. The detailed description and drawings are omitted.

In the present invention, as shown in Figure 2, the water treatment tube (1), electrodialysis machine (10), electrolyzer (20), hypochlorous acid sterilization means (30) and ferrate sterilization means (40) are packaged for installation and use There is convenience, the filter 50 for pre-treatment (filtration) of foreign matter contained in the ballast water may be applied to the inlet side of the water treatment pipe (1). The filter 50 filters foreign substances that degrade the sterilization effect by hypochlorous acid and perate.

On the other hand, hypochlorous acid and perate have a sterilization effect when less than the proper amount is used, or on the contrary, when more than necessary, the sterilization effect and side effects occur, so that the appropriate amount of hypochlorous acid and perate can be used for the first and second sensors (60, 70) applies.

The first and second sensors 60 and 70 detect the pH of the first and second treated water, and the controller is based on the sensing values of the first and second sensors 60 and 70 and the stored reference values. Hypochlorite sterilization means 30 and ferrate sterilization means 40 are controlled (control of each pump or valve).

The ballast water flowing into the water treatment pipe (1) is neutral at pH 7, and the primary sterilized water firstly sterilized by the reaction of hypochlorous acid and ballast water is suitable at pH 4.5 to 5.5, For secondary sterilized water, pH 6.5 ~ 8.5 is appropriate.

That is, the controller compares the detected value detected by the first and second sensors 60 and 70 in real time with the reference value (range), and if the current pH of the primary treated water is higher than the reference pH, the hypochlorous acid (acid) Increasing the addition amount and conversely, if the current pH is lower than the reference pH, the amount of hypochlorous acid is decreased. Also, if the pH of the secondary treated water is higher than the reference pH, the amount of perate (alkaline) is reduced and if the current pH is lower than the reference pH. Control to increase the amount of ferrate added.

On the other hand, primary sterilization by hypochlorous acid also has the function of creating an atmosphere of secondary sterilization by ferrate, and when the acidic atmosphere is not properly formed by hypochlorite, A sterilizing atmosphere can be created. That is, a pH adjusting means 80 is added to add a pH adjusting agent (sulfuric acid, hydrochloric acid, etc.) before the primary treated water reacts with the perate.

The pH adjusting means 80 is controlled by the controller, and the controller controls to add the pH adjusting agent to the primary treated water through the pH adjusting means 80 when the pH of the primary treated water does not maintain an appropriate acidic atmosphere. do. The pH adjusting means 80 is effectively used when the addition amount of hypochlorous acid cannot properly adjust the pH of the primary treated water.

Up to now, it has been described that the vessel ballast water is sequentially mixed with hypochlorous acid and perate during the flow through the water treatment pipe (1), the present invention is the primary treatment tank (ship ballast water and hypochlorous acid reaction), secondary treatment tank It is also possible to batch-process by (the first treatment water sterilized in the primary treatment tank and the ferrate reaction).

Sterilization method of water containing ballast water using a ferrate according to the present invention is as follows.

The present invention can be both batch and continuous, and hereinafter will be described based on the continuous.

According to the present invention, for example, the raw water (ship ballast water, etc.) stored in a tank or the like is supplied to the water treatment pipe at a constant speed, so that the raw water is discharged to the outlet while passing through the water treatment pipe, and in this process, the raw water and hypochlorous acid, By sequentially reacting with the rate, purified water (a state in which natural discharge is possible) is produced.

1. First sterilization.

The ballast water flows into the water treatment pipe 1 through the inlet of the water treatment pipe 1 through pumping, and the hypochlorous acid sterilization means 30 receives the hypochlorous acid generated by the electrodialysis machine 10 in the water treatment pipe 1. To feed. Hypochlorous acid supplied to the water treatment pipe 1 reacts with ballast water to firstly sterilize the bacteria contained in the raw water. The sterilization rate of the primary treated water will vary according to the flow rate of the ballast water, the flow rate, the amount of hypochlorous acid, etc., and the controller controls the increase or decrease of the input amount of hypochlorous acid based on the detection value of the first sensor 60.

That is, the first sensor 60 detects the pH of the primary treated water passing through the hypochlorous acid sterilization means 30 in real time, and the controller compares the current value detected from the first sensor 60 with the stored reference value. If the current value is outside the range of the standard value of 4.5 to 5.5, increase or decrease the amount of hypochlorous acid, and if the current value is within the range of the reference value, maintain the amount of hypochlorous acid.

2. Ferrate sterilization.

The primary treated water passes through the ferrate sterilization means 40, and the secondary sterilization is performed by reacting the ferrite and the primary treated water introduced through the ferrate sterilization means 40. Ferrate is a green material and has no pollutants on its own and there is no secondary pollution during water treatment. Ferrate is changed from the initial hexavalent iron ions to trivalent iron ions after the water treatment. Only the ions of the iron ions are changed, so that only secondary reactions occur.

3. Create an acidic atmosphere.

On the other hand, when the pH of the primary treated water reacted with hypochlorous acid reacts with the ferrate, when the natural discharge is impossible or the sterilization effect is weak due to the reaction with the ferrate, the primary treated water may be formed in an acidic atmosphere.

When the pH adjusting means 80 is applied, the controller inputs a pH adjusting agent (sulfuric acid, hydrochloric acid, etc.) when it is determined that the input of the pH adjusting agent is required by comparing the detected value of the first sensor 60 with the reference value.

The dose of the pH adjuster depends on the detected value of the first sensor 60. If the pH of the primary treated water adjusted to the acidic atmosphere through the pH adjuster satisfies the reference value, the dose of pH adjuster is maintained. Increase or decrease the input of the regulator. This process does not sterilize the primary treated water, but as a pretreatment process for the subsequent ferrate sterilization process, the primary treated water maintains a pH of 5 to 6 to create an atmosphere of secondary sterilization by ferrate.

1: water treatment pipe,
10: electrodialysis machine, 20: electrolyzer
30: hypochlorite sterilization means, 40: ferrate sterilization means
50: filter, 60, 70: 1st, 2nd sensor
80: pH adjusting means,

Claims (11)

Hypochlorous acid and perate supply means for supplying hypochlorous acid and ferrate, respectively;
Hypochlorous acid sterilization means (30) for primary sterilization of the raw water by adding hypochlorous acid supplied through the hypochlorous acid and perate supply means to the raw water;
Perate sterilization means (40) for secondly sterilizing the primary treated water by adding the ferrate supplied from the hypochlorous acid and the ferrate supply means to the primary sterilized water through the hypochlorous acid sterilization means Including,
The hypochlorous acid and ferrate supply means,
A seawater or sodium chloride aqueous solution is supplied as an electrolytic water therein, an electrodialysis tank 11 equipped with a cation exchange membrane 12, and an anode plate provided with a current applied therebetween with the cation exchange membrane 12 interposed therebetween. An electrodialysis machine (10) consisting of a supply pipe for supplying hypochlorous acid and perate made in the electrodialysis tank (13) and the negative electrode plate (14), respectively;
An electrolysis tank 21 to which caustic soda recovered through the electrodialysis machine is supplied as electrolyzed water therein, respectively installed in the electrolysis tank to receive a current, respectively, a positive electrode plate 22 and a negative electrode plate 23 made of iron, and the Sterilization apparatus for water containing ballast water using a ferrate, characterized in that consisting of a feed pipe for supplying the ferrate made in an electrolysis tank to the raw water, the electrolyzer (20) for producing the ferrate. delete The method according to claim 1, wherein the first sensor 60 for detecting the pH of the first sterilized water sterilized by the hypochlorous acid sterilization means, the pH of the second treated water sterilized secondly through the ferrate sterilization means Comparing the pH value detected by the second sensor 70 to be detected by the first and second sensors with a pre-stored step-by-step reference pH and by using the hypochlorous acid sterilizing means and perate sterilizing means based on the comparison value; Sterilizing apparatus for water containing ballast water using a ferrate, characterized in that it comprises a controller for controlling the amount of the ferrate added. The method according to claim 3, wherein the pH control means for adding the pH adjusting agent to the primary treatment water sterilized by the hypochlorous acid sterilization means to form the primary treated water in an acidic component atmosphere, characterized in that it comprises a Sterilization apparatus for water containing ballast water using ferrate. The water treatment pipe (1) of claim 1, wherein one side includes an inlet through which raw water is introduced, and the other side includes a water treatment pipe (1) having a discharge port through which purified water is discharged.
The hypochlorous acid sterilization means and the ferrate sterilization means are connected to each other at regular intervals from the inlet side of the water treatment pipe to equilibrate the vessel equilibrium using ferrite, characterized in that the sterilization treatment of the raw water flowing into the water treatment tube continuously. Sterilization device of water containing water. The water disinfection apparatus according to claim 5, wherein the ballast water using the ferrate is installed on the inlet side of the water treatment tube and includes a filter (50) for filtering foreign substances contained in raw water. First step of sterilizing the raw water by adding hypochlorous acid to the raw water;
And a second step of adding ferrate to the first sterilized first treated water through the first step to secondly sterilize the first treated water and treating it with purified water.
Hypochlorite and caustic soda are produced by electrodialysis using an aqueous sodium chloride solution or seawater as a starting material, and the hypochlorite is fed to the first step, and the caustic soda is electrolyzed to form a perate. Sterilization method of water containing ballast water using a ferrate, characterized in that the supply to the second step. delete 8. The vessel equilibrium of claim 7, wherein the first treatment water is added to the first treatment water treated through the first step, thereby forming the first treatment water in an acidic atmosphere. Method of sterilizing water containing water. The method of claim 7, wherein the hypochlorous acid is added in the first step to maintain the primary treated water at pH 4.5 to 5.5, and in the second step, the perate is added to maintain the purified water at pH 6.5 to 8.5. Sterilization method of water containing ballast water using a ferrate, characterized in that. The method according to claim 7, wherein the raw water is supplied from one side of the water treatment pipe and discharged to the other side while the hypochlorous acid, pH regulator and the ferrate in order to sequentially purify the raw water characterized in that A method of sterilizing water containing ballast water using a rate.

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