KR20150074244A - Cdi type water treatment apparatus - Google Patents

Abstract

A CDI type water treatment apparatus according to the present invention comprises a filter means purifying raw water by a CDI method through an electrode part formed by having electrodes and separators alternately stacked; and a sterilization means generating a sterilization substance in the raw water and supplying to the electrode part for sterilizing the electrode part of the filter means. The sterilization means can reduce chloride ion (Cl^-) into chloride (Cl_2) for generating the sterilization substance.

Description

CDI TYPE WATER TREATMENT APPARATUS [0002]

The present invention relates to a CDI-type water treatment apparatus, and more particularly, to a CDI-type water treatment apparatus which can sterilize a chemical substance without separately supplying a chemical substance as a sterilizing substance and can prevent a problem caused by bacteria will be.

A water treatment apparatus, such as a water purifier, for treating raw water to generate a purified water is now being variously disclosed. Recently, electric deionization type water treatment devices such as EDI (Electro Deionization), CEDI (Continuous Electro Deionization) and CDI (Capacitive Deionization) have been spotlighted. Of these, the CDI system water treatment system is the most popular.

The CDI method refers to a method of removing ions (contaminants) using the principle that ions are adsorbed and desorbed from the surface of an electrode by an electric force. This will be described in more detail with reference to FIG. 5 and FIG. When raw water including ions is passed through the electrodes in a state where electric power is supplied to the electrodes, the negative ions move to the positive electrode and the positive ions move to the negative electrode as shown in FIG. That is, adsorption occurs. Such adsorption can remove ions contained in the raw water. However, if the adsorption continues, the electrode will no longer be able to adsorb ions. In such a case, as shown in Fig. 6, it is necessary to desorb the ions adsorbed on the electrode to regenerate the electrode. (At this time, the reproduction number is generated and discharged.)

The inventors of the present invention have found that the use of the CDI-type water treatment apparatus results in the generation of bacteria in the filter (more precisely, the electrode section described later) and the life of the filter is reduced. In more detail, the use of a CDI-type water treatment apparatus may cause bacteria to flow into the filter through raw water or to multiply bacteria in the filter, resulting in a large number of bacteria in the filter. When bacteria are generated as described above, a biofilm or the like is formed and the differential pressure of the filter increases. This not only reduces the extraction flow rate of the purified water, but also contaminates the electrode surface of the filter and deteriorates the water purification performance. Therefore, it is necessary to sterilize the filter in order to continuously use the CDI-type water treatment apparatus. However, adding chemicals separately for this purpose may cause problems such as electrode life, odor, and stability.

DISCLOSURE Technical Problem Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is therefore an object of the present invention to provide a CDI method capable of sterilizing a chemical substance without separately supplying a chemical substance, Water treatment apparatus of the present invention.

The CDI-type water treatment apparatus according to the present invention comprises filter means for purifying raw water in CDI system through electrode portions formed by alternately stacking electrodes and separators, and filter means for sterilizing the electrode portions of the filter means, And a sterilizing means for supplying the sterilizing means to the portion. The sterilizing means is a chlorine ion (Cl ^-) in the raw water to generate the antiseptic can be reduced by a chlorine (Cl _2).

The CDI-type water treatment apparatus according to the present invention can sterilize a chemical substance without needing to supply a chemical substance as a sterilizing substance because the chlorine ion (Cl ^- ) in the raw water is reduced to chlorine (Cl ₂ ) It is possible to prevent the problems caused by the above-mentioned problems.

1 is a perspective view showing a filter means according to Embodiment 1 of the present invention.
Fig. 2 is an exploded perspective view showing the filter means of Fig.
Fig. 3 is an exploded perspective view showing the electrode portion and the sterilizing means of the filter means of Fig.
4 is a schematic view schematically showing a water treatment apparatus according to Embodiment 2 of the present invention;
5 is a conceptual diagram illustrating the principle of integers in the CDI scheme
6 is a conceptual diagram illustrating the principle of reproduction in the CDI system.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited or limited by the following examples.

Example 1

Fig. 1 is an exploded perspective view showing the filter means of Fig. 1, Fig. 3 is an exploded perspective view showing the electrode means of the filter means of Fig. 1 and the sterilizing means Fig. The water treatment apparatus according to the first embodiment of the present invention relates to a water treatment apparatus of the CDI type and includes a filter means 100 and a sterilizing means 200 as shown in Figs.

[Filter means]

The filter means 100 includes an electrode portion 110, a filter case portion 130 and a terminal portion 150. First, the electrode unit 110 is examined. The electrode unit 110 serves to purify the raw water by the CDI method. More specifically, the electrode unit 110 is formed by alternately stacking the electrodes 111 and 113 and the separator 112 as shown in FIG. At this time, the electrode includes the anode 111 and the cathode 113. That is, the electrode unit 110 is formed by stacking the anode 111 and the cathode 113 facing each other through the separator 112. Wherein the separator forms a gap between the positive electrode and the negative electrode.

The electrodes 111 and 113 are generally formed by applying activated carbon to both surfaces of a graphite foil. At this time, the graphite foil may include a main body portion (see hatched portions in FIG. 3) to which activated carbon is applied, and protruding portions 111a and 113a that protrude from the main body portion but are not coated with activated carbon. Here, the projecting portions 111a and 113a form the electrode tabs of the electrodes 111 and 113, respectively. The electrode unit 110 can be operated by supplying power to the electrodes 111 and 113 through the electrode tabs 111a and 113a.

On the other hand, the anode 111 and the cathode 113 need to be electrically separated from each other. Therefore, it is preferable that the positive electrode tab 111a and the negative electrode tab 113a are spaced apart from each other as shown in FIG. However, it is preferable that the positive electrode tabs 111a and the negative electrode tabs 113a protrude in the same direction from each other at the same positions as shown in FIG. 3 between the positive electrode tabs 111a and the negative electrode tabs 113a. In this case, it is convenient to supply power to the positive electrode tab 111a and the negative electrode tab 113a, respectively.

Next, the filter case part 130 will be described. The filter case part 130 receives the electrode part 110 as shown in FIG. More specifically, the filter case unit 130 includes a lower case 131 in which an opening 132 is formed at an upper portion and an electrode unit 110 is accommodated therein, and a lower case 131 for sealing the opening 132 of the lower case 131. [ And a case (136). That is, after the electrode unit 110 is inserted into the lower case 131 through the opening 132 of the lower case 131, the opening 132 of the lower case 131 is closed with the upper case 136, do. Here, the lower case 131 has a water inlet 133 through which raw water is received at the side, and the upper case 136 has a water outlet 137 through which purified water flows out from the upper case. At this time, the outflow port 137 is formed to correspond to the outflow hole 115 of the electrode unit 110.

According to this structure, the enemy is purified by the following process. First, the raw water is supplied to the inside of the filter case part 130 through the inlet 133. Then, the raw water is supplied to the inside of the electrode unit 110 through the side surface of the electrode unit 110 by the pressure according to the supply. The raw water then flows between the anode 111 and the cathode 113 inside the electrode unit 110 and purified according to the CDI method. The raw water (that is, an integer number) is then discharged through the outlet hole 115 to the outside of the electrode unit 110. Then, the raw water is discharged to the outside of the filter case part 130 through the outlet port 137.

Next, the terminal unit 150 will be described. The terminal unit 150 is electrically connected to the electrode tabs 111a and 113a to supply power from the external power source (not shown) to the electrodes 111 and 113. [ More specifically, as shown in FIGS. 2 and 3, the terminal unit 150 includes a conductive electrode terminal 151 which is in contact with the electrode tabs 111a and 113a at one end. (When electric power is supplied to the other end of the electrode terminal in a state where the electrode tab is in contact with one end of the electrode terminal, power can be supplied to the electrode tab through the electrode terminal.)

The electrode terminal 151 is preferably made of stainless steel. This also applies to the terminal band 152 to be described later. Stainless steel is cheap because of its good electrical conductivity. However, stainless steel has a limitation that rust can be generated due to oxidation due to current flow. In order to overcome this limitation, it is also considered to form the electrode terminal 151 of titanium (Ti). However, there is a limitation that titanium can be oxidized according to the current flow to weaken the electric conductivity.

Therefore, it is most preferable that the electrode terminal 151 is formed of platinum (Pt). This also applies to the terminal band 152 to be described later. This is because the platinum is not oxidized to generate rust or the problem that the electrical conductivity is weakened does not occur. However, in consideration of the high cost, it is also conceivable to form the electrode terminal 151 by coating the surface with platinum (Pt).

The terminal unit 150 may further include a conductive terminal band 152 surrounding the electrode tab 111a or 113a together with the electrode terminal 151. [ The terminal band 152 covers the electrode tabs 111a and 113a together with the electrode terminal 151 so that power can be smoothly supplied even to the opposite electrode taps remote from the electrode tab 151 where the electrode terminal 151 directly contacts.

At this time, it is preferable that the terminal band 152 surrounds the electrode tabs 111a and 113a together with the electrode terminal 151 so that the electrode tabs 111a and 113a are pressed inward. When the electrode tabs are separated from the electrode tabs, it is difficult to supply power from the electrode tabs to the electrode tabs. Therefore, when the terminal tabs 152 wrap the electrode tabs 111a and 113a together with the electrode terminals 151 so that the electrode tabs 111a and 113a are pressed inward, the electrode tabs and the electrode tabs may not be separated from each other, .

It is also preferable that the terminal band 152 surrounds the electrode tabs 111a and 113a with the electrode terminals 151 at least one time outside the electrode tabs 111a and 113a. This is because when the terminal tabs 152 wrap the electrode tabs 111a and 113a one by one, power can be smoothly supplied to the electrode tabs 111a and 113a which are not in direct contact with the electrode terminals 151. [ However, if necessary, the terminal band may be formed in a C shape so that only a part of the electrode tab is covered.

[Sterilization means]

The sterilizing unit 200 serves to sterilize the electrode unit 110 to generate sterilizing material from the raw water and supply the sanitizing material to the electrode unit 110. The sterilizing means 200 in order to produce the sterilizing substance as a chlorine ion (Cl ^-) in the raw water can be reduced by a chlorine (Cl _2). In order to reduce the chlorine ion to chlorine, the sterilizing means 200 may be formed of ruthenium oxide (RuOx) coated on the electrode terminal 151. This will be described in more detail below.

When electric power is applied to the electrode terminal 151, the chlorine ions in the raw water can be reduced to chlorine by the ruthenium oxide of the electrode terminal 151. (Raw water generally contains chloride ions itself.) Ruthenium oxide acts as a catalyst to lower the potential difference when reducing chloride ions to chlorine. The chlorine thus produced can be directly dissolved in the raw water to become HOCl (hypochlorous acid). HOCl is a mixed oxidant that can sterilize bacteria. In this way, the sterilizing means 200 can reduce the chlorine ion in the raw water, thereby generating the germicidal material in the raw water.

Accordingly, the water treatment apparatus according to the present embodiment can sterilize the electrode unit 110 without supplying a chemical substance separately as a sterilizing substance. In addition, the water treatment apparatus according to the present embodiment can be used semi-permanently by preventing the problems caused by bacteria through such sterilization.

However, the CDI scheme supplies power to the electrodes 111 and 113 for integer or reproduction. However, if a high voltage is applied to the electrodes 111 and 113, the electrodes 111 and 113 may be oxidized and the lifetime of the electrodes 111 and 113 may be reduced. Therefore, it is preferable that a voltage of 1.7 V or less is applied to the electrodes 111 and 113. Despite the low voltage, a high current flows through the electrodes 111 and 113 due to the characteristics of the CDI scheme. Therefore, even if the voltage applied to the electrode terminal 151 is low, the sterilizing means 200 can sufficiently reduce the chlorine ion.

The sterilizing means 200 may be provided as follows. First, the electrode terminal 151 is coated with ruthenium. Then, the electrode terminal 151 is heated at a high temperature. Such heating furnace ruthenium can be oxidized to ruthenium oxide. Accordingly, sterilization means 200 may be generally provided with ruthenium oxide. Instead of ruthenium, a platinum group metal such as platinum or iridium may be used here. However, ruthenium is most effective. For reference, it is preferable that the ruthenium is coated on both the electrode terminal 151 connected to the positive electrode tab 111a and the electrode terminal 151 connected to the negative electrode tab 113a. The CDI type filter means is that the normal voltage is applied to each other at the time of purification and during reproduction.

[Control of sterilization means]

The water treatment apparatus according to the present embodiment may have an integer mode, a regeneration mode, and a sterilization mode. The sterilization mode is a mode for sterilizing the electrode unit 110 through the sterilizing unit 200. The sterilizing unit 200 is a mode for sterilizing raw water in the electrode unit 110 and regenerating the electrodes 111 and 113 in the electrode unit 110, 110) to sterilize the bacteria. In such a mode, it is necessary to supply electric power to the electrode terminal 151. The water treatment apparatus according to the present embodiment may include control means (not shown) for controlling the supply of such power. That is, the control means controls power to be supplied from the external power source to the electrode terminal 151 in the constant mode, the regenerative mode, and the sterilization mode. (Note that partial sterilization may occur because power is supplied to the electrode terminals even in the constant mode and the regenerative mode.)

Here, the sterilization mode is preferably performed after a predetermined time has elapsed without performing both the integer mode and the regeneration mode. In the integer mode and the regeneration mode, raw water flows from the inlet 133 of the filter case 130 to the outlet 137. (The flow of the raw water is the same as that of the second embodiment to be described later.) Therefore, it is difficult for the sterilizing material to sterilize the electrode unit 110 sufficiently. Accordingly, it is preferable that the sterilization mode is performed when both the integer mode and the regeneration mode are not performed.

That is, when the raw water is stagnating inside the filter case 130 (or when the raw water flows relatively slowly), electric power is applied to the electrode terminal 151 to generate sterilizing material, ) Is easily sterilized sufficiently. However, if the sterilization mode is frequently performed, the sterilization mode may be wasted, so that it is preferable that the sterilization mode is performed after a predetermined time has elapsed without performing both the integer mode and the regeneration mode. At this time, the predetermined time can be appropriately selected according to the time for the bacteria to proliferate in the electrode unit 110.

It is more preferable that the control means determines the magnitude of electric power to be supplied to the electrode terminal 151 in the sterilization mode according to the total dissolved solids (TDS) of the raw water. The high TDS of the raw water means that the concentration of chlorine ions in the raw water can be high. Therefore, if the TDS of the raw water is high, it is desirable to reduce the power to be supplied to the electrode terminal 151 in the sterilization mode. (If the TDS of the raw water is low, the amount of electric power to be supplied to the electrode terminal 151 in the sterilization mode may be increased. . Here, the TDS of the raw water can be measured by separately providing a TDS sensor at the front end of the filter case part 130.

However, when a constant voltage is applied to the electrodes 111 and 113 in the constant mode, the magnitude of the current flowing through the electrodes 111 and 113 varies depending on the TDS of the raw water. That is, if the TDS of the raw water is high, the magnitude of the current flowing through the electrodes 111 and 113 is high, and if the TDS of the raw water is low, the magnitude of the current flowing through the electrodes 111 and 113 is also low. Therefore, even if the TDS sensor is not separately provided, the TDS of the raw water can be estimated based on the magnitude of the current flowing through the electrodes 111 and 113. Thus, even if there is no separate TDS sensor, the magnitude of the electric power to be supplied to the electrode terminal 151 in the sterilizing mode may be determined according to the magnitude of the current flowing from the constant current mode to the electrodes 111 and 113.

Example 2

4 is a schematic view schematically showing a water treatment apparatus according to Embodiment 2 of the present invention. As shown in FIG. 4, the water treatment apparatus according to the second embodiment of the present invention is different from the water treatment apparatus according to the first embodiment in that the sterilizing means 300 is separately provided in front of the filter case parts 130a and 130b. (The structure of Fig. 4 can also be applied to the water treatment apparatus of Embodiment 1).

More specifically, in this embodiment, the sterilizing means 300 includes a sanitizing terminal portion (not shown) coated with ruthenium oxide, and a sterilizing case portion 310 receiving the sterilizing terminal portion. At this time, the raw water is supplied to the filter means through the sterilizing terminal portion in the sterilizing case portion 310 as shown in Fig.

By providing the sterilizing means 300 in this way, the sterilizing means 300 can be operated independently. That is, when the sterilizing unit 300 is operated independently of the operation of the electrode units 110a and 110b, the raw water including the sterilizing material can be supplied to the electrode units 110a and 110b, The raw water not including the sterilizing material can be supplied to the electrode portions 110a and 110b. By selectively activating the sterilizing means as described above, the life of the sterilizing terminal can be prolonged.

The water treatment apparatus according to the present embodiment may also include a control means. In this embodiment, the control means can control not only the power supplied to the electrode terminal 151 (i.e., the electrode) but also the power supplied to the sterilizing terminal portion. More specifically, the control means may include an integer mode in which the raw water is purified in the electrode units 110a and 110b, a regeneration mode in which the electrodes are regenerated in the electrode units 110a and 110b, and the electrode units 110a and 110b, It is preferable to control the power to be supplied from the external power source to the sterilizing terminal when the sterilizing mode is selected among the sterilizing modes in which the electrode units 110a and 110b are sterilized by supplying the raw water including the sterilizing material.

The inventors of the present application have found that when a germicidal material such as HOCl is supplied to the filter means 100 during the operation of the filter means 100 as in an integer mode or a regenerative mode, iron oxide (FeOx) And found that the TDS removal rate decreased. Therefore, it is more preferable that the sterilization mode is performed when the integer mode and the regeneration mode are not performed at all. At this time, it is preferable that the sterilization mode is performed after a predetermined time has elapsed without performing both the integer mode and the regeneration mode. For reference, in the case of Embodiment 2, the flow of raw water may occur in the sterilization mode. (Even in the case of Embodiment 1, the flow of raw water may occur in the sterilization mode if necessary.)

And the control means preferably determines the magnitude of the power to be supplied to the sterilization terminal portion in the sterilization mode according to the TDS of the raw water. This is for the same reason as described in the first embodiment. Further, when a constant voltage is applied to the electrode units 110a and 110b in the integer mode, the control unit determines the magnitude of power to be supplied to the sterilization terminal unit in the sterilization mode according to the magnitude of the current flowing through the electrode units 110a and 110b . This is also the reason as described in the first embodiment.

The raw water is supplied to the inlet ports 133a and 133b of the filter casing sections 130a and 130b or the outlet ports 137a and 137b of the filter casing sections 130a and 130b via the sterilizing terminal section in the sterilizing casing section 310 It is preferable to supply them selectively. When the raw water is supplied to the filter case parts 130a and 130b through the inlet ports 133a and 133b, the sterilizing material in the raw water is hardly supplied to the vicinity of the outlet hole 115 of the electrode parts 110a and 110b (see FIG. 2) . It is preferable to supply the raw water including the germicidal material to the outlet holes 115 of the electrode portions 110a and 110b through the outlet ports 137a and 137b of the filter case portions 130a and 130b as necessary. (This is referred to as backwashing.) In order to realize this, the water treatment apparatus can be implemented as shown in FIG. 4, and its specific operation will be described in detail below. (The following operations may be performed in sequence as needed.)

The filter means may include two electrode portions 110a and 110b as shown in Fig. The electrode portions 110a and 110b need to regenerate the electrodes. However, if the electrode portion is one, no purified water can be generated during the regeneration of the electrode. Therefore, it is preferable that the filter means include two electrode portions 110a and 110b in order to generate the purified water regardless of the regeneration of the electrode. That is, when one of the electrode units is in the regeneration mode, the other electrode unit may be an integer mode.

First, the integer mode is explained. Only the first valve 401 and the fifth valve 405 are opened if the first electrode unit 110a is in the constant mode. (The rest is closed). As a result, the raw water can be supplied to the user through the first electrode unit 110a. If the second electrode unit 110b is in the constant mode, only the first valve 401 and the seventh valve 407 are opened. As such, the raw water can be supplied to the user through the second electrode unit 110b. At this time, the control means may supply power to the electrode terminal of the first electrode unit 110a or the electrode terminal of the second electrode unit 110b.

Next, the playback mode will be described. When the first electrode unit 110a is in the regeneration mode, only the first valve 401 and the fourth valve 404 are opened. (The rest is closed). As such, the raw water can be drained to the outside through the first electrode portion 110a. When the second electrode unit 110b is in the regeneration mode, only the first valve 401 and the sixth valve 406 are opened. As such, the raw water can be drained to the outside through the second electrode portion 110b. At this time, the control means may supply power to the electrode terminal of the first electrode unit 110a or the electrode terminal of the second electrode unit 110b. For reference, the integer mode and the sterilization mode may be performed in combination. For example, if the first electrode unit 110a is in the constant mode and the second electrode unit 110b is in the regeneration mode, the first valve 401, the fifth valve 405, and the sixth valve 406 are opened .

Next, backwashing in the sterilization mode is described. Only the second valve 402 and the eighth valve 408 are opened if the first electrode portion 110a is backwashed. (The rest are closed). When the opening and closing of the first filter case part 130a is completed, the raw water is received by the first electrode part 110a through the outlet port 137a of the first filter case part 130a, And can be drained to the outside through the outlet 133a. Only the third valve 403 and the eighth valve 408 are opened if the second electrode portion 110b is backwashed. The raw water is received by the second electrode portion 110b through the outlet port 137b of the second filter case portion 130b and then discharged to the outside through the inlet 133b of the second filter case portion 130b It can be drained. At this time, the control means may supply electric power to the sterilizing terminal portion of the sterilizing means 300 for cleaning (sterilization).

Alternatively, backwashing may be performed as follows. Only the second valve 402 and the sixth valve 406 are opened. (The rest are closed). When the water is opened and closed as described above, the raw water is discharged from the outlet 137a of the first filter case part 130a, the first electrode part 110a, the inlet 133a of the first filter case part 130a, The second electrode portion 110b and the outlet port 137b of the second filter case portion 130b of the second filter case portion 130b. Only the third valve 403 and the fourth valve 404 are opened. The raw water flows from the outlet 137b of the second filter case 130b to the second electrode 110b to the inlet 133b of the second filter case 130b and then to the first filter case 130a, The first electrode unit 110a, the first filter case unit 130a, and the water outlet 137a of the first filter case unit 130a. At this time, the control means may supply electric power to the sterilizing terminal portion of the sterilizing means 300 for cleaning (sterilization).

Finally, we will explain the precleaning in sterilization mode. If the first electrode unit 110a is cleaned, only the first valve 401 and the fourth valve 404 are opened. When the first filter case part 130a is opened and closed as described above, the raw water is received by the first electrode part 110a through the inlet 133a of the first filter case part 130a, And can be drained to the outside through the opening 137a. If the second electrode portion 110b is cleaned, only the first valve 401 and the sixth valve 406 are opened. The raw water is received by the second electrode portion 110b through the inlet 133b of the second filter case 130b and then discharged to the outside through the outlet 137b of the second filter case 130b It can be drained. At this time, the control means may supply electric power to the sterilizing terminal portion of the sterilizing means 300 for cleaning (sterilization).

100: Filter means 110:
111: positive electrode 111a: positive electrode tab
112: separator 113: cathode
113a: negative electrode tab 115: outflow hole
130: Filter case part 131: Lower case
133: inlet port 136: upper case
137: Outlet port 150: Terminal section
151: electrode terminal 152: terminal band
200: sterilization means 300: sterilization means
310: sterilizing case part 401: first valve
402: second valve 403: third valve
404: fourth valve 405: fifth valve
406: sixth valve 407: seventh valve
408: the eighth valve

Claims (16)

A filter means for purifying the raw water in a CDI manner through an electrode portion formed by alternately stacking an electrode and a separator; And
And sterilizing means for generating sterilizing material from the raw water to sterilize the electrode portion of the filter means and supplying the sterilizing material to the electrode portion. The method according to claim 1,
The sterilizing means is a chlorine ion (Cl ^-) of the raw water in order to produce the sterilizing substance a water treatment system at a CDI system, comprising a step of reducing a chlorine (Cl _2). The method of claim 2,
Wherein the sterilizing means is made of ruthenium oxide (RuOx) coated on an electrode terminal electrically connected to the electrode tab of the electrode and supplying power to the electrode. The method of claim 3,
Further comprising control means for controlling power supplied to the electrode terminal. The method of claim 4,
Wherein the control means controls the electric power supplied from the external power source to the electrode terminal in the constant mode in which the raw water is purified in the electrode portion, the regeneration mode in which the electrode is regenerated in the electrode portion, and the sterilizing mode in which bacteria are sterilized in the electrode portion. And the control unit controls the supply of the water to the water supply unit. The method of claim 5,
Wherein the sterilization mode is performed after a predetermined time has elapsed without performing both the integer mode and the regeneration mode. The method of claim 5,
Wherein the control means controls the magnitude of power supplied to the electrode terminal in the sterilization mode according to the TDS (total dissolved solids) of the raw water. The method of claim 5,
Wherein the control means controls the magnitude of power supplied to the electrode terminal in the sterilization mode according to the magnitude of the current flowing through the electrode when a constant voltage is applied to the electrode in the integer mode. Device. The method of claim 2,
Wherein the filter means further comprises a filter case portion for accommodating the electrode portion, and the sterilizing means is separately provided at a front end of the filter case portion. The method of claim 9,
Wherein the sterilizing means includes a sterilizing terminal portion coated with ruthenium oxide (RuOx) and a sterilizing case portion accommodating the sterilizing terminal portion, and the raw water is supplied to the filter means through the sterilizing terminal portion in the sterilizing case portion CDI type water treatment device. The method of claim 10,
Wherein the raw water is supplied to the inlet port through which the raw water is supplied to the filter casing unit or the outlet port through which the purified water from the filter casing flows out through the sterilizing terminal unit in the sterilizing casing unit. The method of claim 10,
Further comprising control means for controlling power supplied to the sterilizing terminal portion. The method of claim 12,
The sterilizing mode may be selected from the group consisting of an integer mode in which the raw water is purified in the electrode unit, a regeneration mode in which the electrode is regenerated in the electrode unit, and a sterilization mode in which bacteria are sterilized in the electrode unit. And the power is supplied to the terminal unit. 14. The method of claim 13,
Wherein the sterilization mode is performed after a predetermined time has elapsed without performing both the integer mode and the regeneration mode. 14. The method of claim 13,
Wherein the control means controls the magnitude of power supplied to the sterilization terminal portion in the sterilization mode according to the TDS (total dissolved solids) of the raw water. 14. The method of claim 13,
Wherein the controller controls the magnitude of power supplied to the sterilizing terminal in the sterilization mode according to the magnitude of the current flowing through the electrode when a constant voltage is applied to the electrode in the integer mode. Water treatment apparatus.

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