JP2008279408A - Water treatment apparatus and water treatment system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water treatment apparatus capable of removing microorganisms and a scale constituent in a treating water, and carrying out an effective water treatment by freely selecting a treating object according to the nature of the treating water, and to provide a water treatment system provided with the same. <P>SOLUTION: The water treatment apparatus 1 is provided with a first and second modules M1, M2 each having: a first electrode 6 disposed in a flow path of the treating water and having water permeability; a carbon fiber 8 positioned at the downstream side of the first electrode 6 and electrically powered by the first electrode 6; a second electrode 7 positioned at the down stream side of the carbon fiber 8, having water permeability, and being a couple with the first electrode 6; and a non-conductive porous spacer 9 lying between the second electrode 7 and the carbon fiber 8. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is an apparatus for removing or sterilizing microorganisms such as viruses and scales contained in river water, water for eating and drinking, or water (treated water) such as water discharged from pools, public baths, hot springs, etc. It is about.

  In recent years, microorganisms such as bacteria, mold and protozoa contained in river water, water for drinking and drinking water, water discharged from public baths, hot springs, etc. (treated water), scale components such as microbes, dust and fine substances are removed. Therefore, water treatment technology is being developed rapidly.

For example, as one of the water treatment devices for removing microorganisms in the water to be treated, the applicant previously provided a pair of electrodes and a conductor capable of collecting microorganisms in the flow path of the water to be treated. We have developed a device for adsorbing microorganisms on a conductor by applying a positive charge to the body and applying a negative charge to the electrode. This water treatment device can treat water to be treated without using chemicals such as chlorine and ozone, thus avoiding complicated work and danger of handling, and reducing cost such as economy. It has been attracting attention as possible (see, for example, Patent Document 1).
JP 2005-254118 A

  Thus, although the microorganisms in the for-treatment water can be removed by using the above apparatus, the scale components contained in the for-treatment water cannot be removed. Thus, since the conventional apparatus cannot treat microorganisms and scale components in the water to be treated in one tank (in the case), the water to be treated after removing the microorganisms is separated from another apparatus (or tank). To remove the scale component.

  On the other hand, there are various properties of treated water, such as treated water with many scale components and few microorganisms, and treated water with many microorganisms and few scale components. The development of a device that can be processed was also eagerly desired.

  The present invention has been made in order to solve the problems of the related art, and can remove microorganisms and scale components in the water to be treated in a single tank, and also has properties in the water to be treated. Accordingly, it is an object of the present invention to provide a water treatment apparatus capable of realizing efficient water treatment by freely selecting a target to be treated and a water treatment system including the water treatment apparatus.

  The water treatment apparatus according to the first aspect of the present invention includes a first electrode having water permeability disposed in a flow path of water to be treated, and a first electrode located on the downstream side of the first electrode. A carbon fiber to be energized, a water-permeable second electrode that is located on the downstream side of the carbon fiber and forms a pair with the first electrode, and a non-conductive material interposed between the second electrode and the carbon fiber The first and second modules each having a porous porous spacer are provided.

  The water treatment apparatus according to a second aspect of the present invention is characterized in that, in the above invention, each module is configured to be capable of switching a potential applied to each electrode.

  The water treatment device of the invention of claim 3 is the water treatment apparatus according to each of the above inventions, wherein the first module is disposed upstream of the second module in the flow path of the water to be treated. A water passage communicating with the module is provided.

  A water treatment system according to a fourth aspect of the present invention is a water treatment apparatus according to any one of the first and second aspects, a detection means for detecting the amount of microorganisms and scale amount of water to be treated, and an output of the detection means And a control means for controlling energization to the electrodes of the first and second modules of the water treatment apparatus.

  According to the water treatment device of the first aspect of the present invention, the first electrode having water permeability arranged in the flow path of the water to be treated and the first electrode located on the downstream side of the first electrode. A carbon fiber that is energized by the electrode; a water-permeable second electrode that is located downstream of the carbon fiber and that forms a pair with the first electrode; and is interposed between the second electrode and the carbon fiber. Since the first and second modules each having a non-conductive porous spacer are provided, for example, a positive potential is applied to the first electrode of the first module and a negative potential is applied to the second electrode In addition, if a negative potential is applied to the first electrode of the second module and a positive potential is applied to the second electrode, the microorganisms are treated with the carbon fibers of the first module and are treated by electrolysis. Microorganisms can be sterilized by hypochlorous acid and active oxygen generated in water. It is possible to recover the scale carbon fiber or porous spacer Joules.

  Furthermore, if a potential having a high current value is applied to each electrode, microorganisms can be electrocuted and killed.

  In particular, when the potential applied to each electrode is configured to be switchable as in the second aspect of the invention, the optimum treatment can be performed according to the quality of the water to be treated.

  Furthermore, in the invention of claim 3, in each of the above inventions, the first module is disposed upstream of the second module in the flow path of the water to be treated, and the modules communicate with each other between the modules. Since the water flow path is provided, the water to be treated can be selectively passed through each module.

  According to the water treatment system of the invention of claim 4, the water treatment apparatus according to any one of claims 1 and 2, detection means for detecting the amount of microorganisms and scale amount of water to be treated, and this detection means Control means for controlling energization to the electrodes of the first and second modules of the water treatment device based on the output of the water treatment device, so that the optimum treatment according to the amount of microorganisms and scale amount of the water to be treated can be performed. It becomes possible.

  In the present invention, microorganisms such as bacteria and scale components such as dust that are conventionally contained in the water to be treated cannot be treated simultaneously in one apparatus or tank, and further, depending on the properties of the water to be treated. This is to solve the problem that the optimum processing cannot be performed. For the purpose of removing microorganisms and scale components in the water to be treated and performing an optimum treatment according to the properties of the water to be treated, the first having water permeability disposed in the flow path of the water to be treated. An electrode, a carbon fiber positioned downstream of the first electrode and energized by the first electrode, and a water permeability paired with the first electrode positioned downstream of the carbon fiber This is realized by including first and second modules each having a second electrode and a non-conductive porous spacer interposed between the second electrode and carbon fiber. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic configuration diagram of a water treatment system S according to an embodiment including the present invention. The water treatment system S treats water (treated water) such as rainwater, groundwater, drinking water, bath water, hot spring water, etc. stored in the stock solution tank 100 with the water treatment device 1 and then stores them in the treatment liquid tank 110. System.

  In the water treatment system S of the present embodiment, the stock solution tank 100, the filter 101, the pump P1, the valve V1, the flow meter F1, the water treatment device 1, the valves V2 to V4, the treatment liquid tank 110, the pump P2, and the like are connected by piping. It is comprised by doing. Specifically, a pipe L <b> 1 leading to the water treatment apparatus 1 is connected to the stock solution tank 100. The stock solution tank 100 is a tank for storing water (treated water) containing microorganisms, scales, fines, and the like. In this stock solution tank 100, an ATP meter as a detecting means for detecting the amount of microorganisms of the treated water to be treated by the water treatment apparatus 1 (that is, the treated water stored in the stock solution tank 100). And a conductivity meter as a detecting means for detecting the scale amount, a pH meter, and a measuring meter 130 provided with a thermometer, and are partially immersed in the water to be treated in the stock solution tank 100. . This measuring meter 130 is connected to a controller C described later as a control means.

  The pipe L1 extends from one end opened in the stock solution tank 100 to the outside of the stock solution tank 100, and passes through the filter 101, the pump P1, the valve V1, and the flow meter F1, and the treatment tank (case) ) Is connected to the inlet 3 formed at the lower end of 5, and the other end is opened at the bottom of the case 5. The filter 101 is for removing fine substances in the water to be treated. The flow meter F1 is for detecting the flow rate of the water to be treated flowing through the pipe L1.

  Further, an outlet 4 is formed at the upper end of the case 5 of the water treatment apparatus 1, and a pipe L <b> 2 leading to the treatment liquid tank 110 is connected to the outlet 4. The pipe L2 extends from one end opened at the upper part in the case 5 of the water treatment apparatus 1 to the outside of the case 5, and is connected to the treatment liquid tank 110 via the valve V2, and the other end is treated liquid tank. An opening is formed in the upper part of 110. The treatment liquid tank 110 is a tank for storing treated water from which microorganisms, scales, and the like have been removed by the water treatment apparatus 1. The water stored in the processing liquid tank 110 is configured to be pumped by a pipe L5 and a pump P2 interposed in the pipe L5.

  Further, reference numeral 40 in FIG. 1 denotes another outlet for allowing the water to be treated, which passes through the first module M1 (described later) housed in the case 5 of the water treatment apparatus 1, to flow out from the treatment chamber 15. A pipe L3 is connected to the outlet 40. The pipe L3 extends from one end opened at the outlet 40 to the outside of the case 5, and the other end is connected to a middle part of the pipe L2 downstream of the valve V2 through the valve V3. V4 is a degassing valve for discharging gas (gas) such as hydrogen and oxygen generated at the electrodes 6 and 7 by electrolysis in the first and second modules M1 and M2.

  Next, the water treatment apparatus 1 of this invention is demonstrated using FIG. The water treatment apparatus 1 is installed in a flow path of water to be treated that flows from the raw liquid tank 100 to the treatment liquid tank 110. The watertight case 5 and the first module M1 accommodated in the case 5 and It consists of a second module M2. The case 5 is made of an insulating member such as glass or a resin material, and includes a main body 10 having a vertically long cylindrical shape and lid members 12 and 13 for closing upper and lower openings of the main body 10. The inside of the main body 10 is a processing chamber 15 in which the first and second modules M1 and M2 are accommodated.

  A through hole is formed in the lid member 12 so as to penetrate the lid member 12 in the axial direction (vertical direction in FIG. 2). The through hole serves as an outlet 4 for taking out the water to be treated from the treatment chamber 15. ing. A pipe L <b> 2 is connected to the outlet 4, and one end of the pipe L <b> 2 opens at the outlet 4.

  Similarly to the lid member 12, the lid member 13 is formed with a through-hole penetrating in the axial direction (vertical direction in FIG. 2). The through-hole is formed from the stock solution tank 100 containing microorganisms, scales, fines, and the like. Water (treated water) is an inlet 3 for guiding the water (treatment water) into the treatment chamber 15 of the water treatment apparatus 1 through the pipe L1. The pipe L <b> 1 is connected to the inlet 3, and one end of the pipe L <b> 1 opens at the inlet 3. In this embodiment, the pipe L1 and the inflow port 3 constitute a water passage for passing water to the first module M1 and the second module M2 in the treatment chamber 15 of the water treatment apparatus 1.

  Lid members 12 and 13 are attached to the upper and lower edges of the main body 10 via seal members (not shown) such as O-rings. Thereby, case 5 with high sealing performance and water tightness is constituted.

  The first and second modules M <b> 1 and M <b> 2 are formed by a mesh-like first electrode 6 having water permeability, and a first electrode 6 that is located downstream of the first electrode 6. A carbon fiber 8 having water permeability to be energized, and a second electrode 7 having a mesh shape (mesh shape) having a water permeability which is located downstream of the carbon fiber 8 and forms a pair with the first electrode 6; The porous spacer 9 having water permeability, which is an insulator interposed between the second electrode 7 and the carbon fiber 8, is formed.

  The first module M1 is disposed below the case 5 on the upstream side of the second module M2 in the flow path of the water to be treated. The second module M2 is disposed in the flow path of the water to be treated. It is arranged above the case 5 on the downstream side of one module M1. That is, the first module M1 is configured by stacking the first electrode 6, the carbon fiber 8, the spacer 9, and the second electrode 7 in this order, and in this state, the first module M1 is disposed below the processing chamber 15 in the case 5. Has been. Similarly to the first module M1, the second module M2 is also configured by stacking the first electrode 6, the carbon fiber 8, the spacer 9, and the second electrode 7 in this order. The module M1 is disposed above the processing chamber 15 in the case 5 with a predetermined interval.

  That is, in the treatment chamber 15 in the case 5, the electrode 6 of the first module M1 is located on the upstream side of the flow path of the water to be treated, and the electrode 7 of the second module M2 is located on the downstream side of the flow path. At the same time, the first module M1 is disposed such that a gap is formed between the electrode 7 that is the most downstream side of the flow path in the first module M1 and the electrode 6 that is the most upstream side of the flow path in the second module M2.

  The electrodes 6 and 7 are made of platinum (Pt), iridium (Ir), tantalum (Ta), palladium (Pd), titanium, stainless steel, or at least platinum (Pt), iridium (Ir), tantalum (Ta). ), Palladium (Pd), a conductive material containing any of titanium or stainless steel, which is an insoluble electrode processed into a mesh shape (network shape). The electrodes 6 and 7 are made of the same material. Specifically, the electrodes 6 and 7 of this embodiment are made of a mesh of a platinum-iridium-coated titanium electrode in which a titanium electrode is coated with an alloy composed of platinum and iridium. And what shall be processed so that the whole may show a disk shape shall be used. In other words, the electrodes 6 and 7 are processed into a mesh shape so that the water to be treated can flow. The mesh electrodes 6 and 7 are formed in a disk shape having an outer diameter substantially the same as the inner diameter of the main body 10. The electrodes 6 and 7 are connected to a DC power source DC.

  The carbon fiber 8 is disposed in the energized state downstream of the electrode 6 in the flow path. In the water treatment apparatus 1 of the present embodiment, the carbon fibers 8 of the modules M1 and M2 are arranged in close contact with the upper surface of the electrode 6 on the downstream side of the flow path. Further, as the carbon fiber 8, a felt-like material fired at 2000 ° C. or higher (preferably 2500 ° C.) is used. Furthermore, the carbon fiber 8 has a structure in which no direct current is generated between the electrodes 6 and 7. Specifically, in the present embodiment, at least the electrode 6 is formed so as not to come out of the carbon fiber 8 in the cross-sectional direction of the treatment chamber 15 which is a flow path of water to be treated.

  In the present embodiment, since the electrode 6 is formed in a disk shape having an outer diameter substantially the same as the inner diameter of the main body 10 as described above, the carbon fiber 8 is also the same, that is, in the direction of the flow path through which the water to be treated flows. It is formed in a disk shape having an outer diameter substantially the same as the inner diameter of the main body 10 so that the cross-sections orthogonal to each other are substantially the same. In this way, by adopting a structure in which the electrode 6 does not come out of the carbon fiber 8 in the cross-sectional direction of the flow path, it is possible to avoid the inconvenience that direct energization occurs between the electrodes 6 and 7. In the processing chamber 15, the carbon fiber 8 is disposed on the upper surface of the electrode 6 with no gap between the central portion of the electrode 6 and the inner peripheral surface of the main body 10 so that the central portion of the carbon fiber 8 coincides. Yes.

  On the other hand, the spacer 9 is provided in contact with the upper surface of the carbon fiber 8 on the downstream side of the flow path of the carbon fiber 8. That is, the spacer 9 is interposed between the carbon fiber 8 and the electrode 7 located on the downstream side of the flow path. The spacer 9 is preferably a non-conductive stretchable porous body having a high porosity. Here, the porosity is a ratio of voids (air portions) existing inside the porous structure. Therefore, the higher the porosity is, the lower the density (bulk density) of the spacers 9 is (the coarser is the eyes), and the lower the porosity is, the higher the density of the spacers 9 is (the finer the eyes). In this embodiment, a polymer non-woven fabric having water permeability, for example, a polyvinylidene chloride polymer such as polyester or saran (manufactured by Asahi Kasei) and having a porosity of more than 95% is used as the spacer 9. did.

  The spacer 9 is in contact with the upper surface of the carbon fiber 8 and presses the carbon fiber 8. Thereby, the carbon fiber 8 is compressed by the pressing force of the spacer 9, is pressed against the electrode 6, and is in close contact with the upper surface of the electrode 6. That is, the carbon fiber 8 is not flat on the lower surface, and has an uneven shape. Similarly, the upper surface of the carbon fiber 8 is not flat and has an uneven shape. Therefore, by providing the spacer 9 on the upper surface of the carbon fiber 8 and compressing the carbon fiber 8 by the pressing force of the spacer 9, the adhesion of the carbon fiber 8 to the electrode 6 can be further increased. In this way, the carbon fiber 8 is brought into close contact with the electrode 6, whereby the carbon fiber 8 is electrically connected to the electrode 6 to form a part of the electrode 6. That is, when the electrode 6 is energized, the carbon fiber 8 is also energized, and the carbon fiber 8 is charged to the same potential as the electrode 6.

  In particular, since the carbon fiber 8 can be pressed against and closely adhered to the upper surface on the downstream side of the electrode 6 by the spacer 9, the contact resistance of the carbon fiber 8 to the electrode 6 is reduced, and not only the surface of the carbon fiber 8 but also the entire surface. Can be part of the electrode 6. As described above, in this embodiment, the carbon fiber 8 is compressed by the spacer 9 to such an extent that the flow of the water to be treated is not hindered, and the carbon fiber 8 and the electrode 6 are brought into close contact with each other. By suppressing the carbon fiber 8, the carbon fiber 8 is easily energized, and the entire carbon fiber 8 can be a part of the electrode 6.

  Thereby, the whole carbon fiber 8 can be charged to the same potential as the first electrode. For example, when a positive potential is applied to the electrode 6, the entire carbon fiber 8 is also charged to a positive potential, so that the contact area between the portion charged to the positive potential of the carbon fiber and the water to be treated increases dramatically. . As a result, the area for adsorbing microorganisms charged to a negative potential is increased, and the collection efficiency of microorganisms is significantly improved.

  Furthermore, by providing the spacer 9, the surface of the carbon fiber 8 on the electrode 7 side (that is, the upper surface in this embodiment) can be flattened. That is, as described above, since the carbon fiber 8 is provided in close contact with the electrode 6, the entire carbon fiber 8 forms a part of the electrode 6, but the upper surface of the carbon fiber 8 is not flat. Since the distance between the opposing electrodes 7 is non-uniform, current does not flow uniformly through the carbon fibers 8 and the distance between the upper surface of the carbon fibers 8 and the lower surface of the electrodes 7 is the closest (ie, the shortest distance location) ) Causes a disadvantage that a large current flows locally.

  As a result, there is a problem that the carbon fiber 8 is liable to be deteriorated and the life of the carbon fiber 8 is shortened at a portion where a large current flows locally. Therefore, by arranging the spacer 9 on the upper surface of the carbon fiber 8, the surface on the electrode 7 side (that is, the upper surface in the present embodiment) can be flattened. Thereby, the distance between the carbon fiber 8 and the electrode 7 can be made substantially uniform. Thereby, the inconvenience that a large current flows locally through the carbon fiber 8 can be solved.

  In the present embodiment, as described above, the electrodes 6 and the carbon fibers 8 are formed so as to have substantially the same cross section, and therefore, the central portion of the electrodes 6 and the central portion of the carbon fibers 8 are arranged to coincide with each other. Thus, the upper surface of the electrode 6 and the lower surface of the carbon fiber 6 are in contact with each other.

  On the other hand, the spacer 9 of the present embodiment is formed in a disk shape like the carbon fiber 8, but has an outer diameter smaller than that of the carbon fiber 8. The spacer 9 is disposed in close contact with the upper surface of the carbon fiber 8 so that the central portion (center in the axial direction) coincides with the central portion (center in the axial direction) of the carbon fiber 8. The spacer 9 is disposed on the carbon fiber 8 with the fixing ring 19 attached to the outer periphery. The fixing ring 19 has an inner diameter that is substantially the same as the outer diameter of the spacer 9, and is configured so that the outer peripheral surface of the spacer 9 can be held by the inner peripheral surface of the fixing ring 19. The outer diameter of the fixing ring 19 is substantially the same as the inner diameter of the wall surface of the main body 10, and when the fixing ring 19 is attached to the main body 10, there is no gap between the wall surface of the main body 10 and the fixing ring 19. Is formed.

  Thus, the outer diameter of the spacer 9 is made smaller than the outer diameter of the carbon fiber 8, and the outer diameter of the spacer 9 is made the same as the inner diameter of the wall surface of the main body 10 in the space formed by making the outer diameter of the carbon fiber 8 smaller. By attaching the formed fixing ring 19, the flow path where the spacer 9 is located is narrower than the part where the carbon fiber 8 is located. As a result, even if there is a slight gap between the outer peripheral surface of the carbon fiber 8 and the inner peripheral surface of the wall surface of the main body 10, even if the water to be treated that has passed through the electrode 6 flows through this gap, the carbon fiber 8 flows inward (inner diameter side) by the fixing ring 19 located on the upper surface of the carbon fiber 8 and passes through the carbon fiber 8 located here. As a result, the inconvenience of direct energization between the electrodes 6 and 7 can be prevented.

  In particular, by attaching the fixing ring 19 to the outer periphery of the spacer 9 as in the present embodiment, the inconvenience of the spacer 9 moving can be eliminated, and the pressing force for suppressing the upper surface of the carbon fiber 8 by the weight of the fixing ring 19 is also achieved. Since it increases, the carbon fiber 8 can be brought into close contact with the electrode 6 and the upper surface of the carbon fiber 8 can be further flattened, so that a more uniform electric field can be obtained on the upper surface of the carbon fiber 8. As a result, the processing efficiency can be further improved.

  On the other hand, the electrode 7 is disposed above the spacer 9 and in close contact with the upper surface of the spacer 9. In the present embodiment, the distance between the carbon fiber 8 constituting part of the electrode 6 of each module M1, M2 and the electrode 7, that is, the surface (upper surface) of the carbon fiber 8 on the electrode 7 side and the lower surface of the electrode 7 The distance of each is 19 mm.

  And in the water treatment apparatus 1 of a present Example, it enters into the processing chamber 15 formed in the case 5 from the inflow port 3 formed in the lid member 13 of the case 5, and the electrode 6 of the first module M1, the carbon fiber 8, the spacer 9, the electrode 7, and the electrode 6 of the second module M 2, the carbon fiber 8, the spacer 9, and the electrode 7 are sequentially passed through the outlet 4 formed in the lid member 12. A flow path for the treated water is formed. Further, the flow path of the water to be treated configured in the processing chamber 15 is configured around the center of the surface of the carbon fiber 8 on the electrode 6 side (the lower surface in this embodiment) in each of the modules M1 and M2. Yes. Thereby, since the to-be-processed water can be distribute | circulated uniformly to the carbon fiber 8 of each module M1 and M2, the process efficiency of to-be-processed water can be improved.

  On the other hand, the case 5 is formed with another outlet 40 for allowing the water to be treated that has passed through the first module M1 to flow out of the treatment chamber 15. Specifically, the outlet 40 is located on the side surface of the main body 10 between the first and second modules M1 and M2 in a state where the first and second modules M1 and M2 are accommodated in the case 5. It consists of a through-hole penetrating the wall surface of the main body 10 in the horizontal direction. A pipe L3 is connected to the outlet 40, and one end of the pipe L3 opens in the outlet 40. The pipe L3 extends from one end opened at the outlet 40 to the outside of the case 5, and the other end is connected to the middle part of the pipe L2 through the valve V3.

  And if the said valve | bulb V3 is opened, the to-be-processed water which passed through the 1st module M1 will flow out of the case 5 from the piping L3 connected to the outflow port 40. FIG. Thereby, the to-be-processed water processed by the 1st module M1 can be made to flow out of the process chamber 15 without passing water through the 2nd module M2.

  The operation of the water treatment system S is controlled by the controller C. The controller C is a control means for controlling the system S such as operation of the pumps P1 and P2, opening and closing of the valves V1 to V4, energization of the electrodes 6 and 7 by the DC power source DC, and a general-purpose microcomputer. It is configured. In particular, the controller C of this embodiment is connected to a measuring meter 130 immersed in the water to be treated in the stock solution tank 100, and the controller C outputs the output of the measuring meter 130, specifically, the ATP measuring meter and Based on the output information of the conductivity meter, the energization of the electrodes 6 and 7 of the first and second modules M1 and M2 of the water treatment apparatus 1 by the DC power source DC and the opening and closing of the valves V2 and V3 are controlled. . Further, the opening degree of the valve V1 is controlled by the controller C so that the flow rate of the water to be treated detected by the flow meter F1 becomes a predetermined constant flow rate. Next, the operation of the water treatment system S with the above configuration will be described with reference to FIG.

(1) First Treatment Process First, when the power of the water treatment system S is turned on, the controller C uses the ATP meter of the meter 130 provided in the stock solution tank 100 to measure the ATP concentration in the treated water. The conductivity in the treated water is detected by a conductivity meter. At this time, if the ATP concentration detected by the ATP meter is higher than the predetermined value a1 and the conductivity detected by the conductivity meter is higher than the predetermined value b1, microorganisms and scale are present in the water to be treated. Since it is contained in a large amount, the controller C executes a first treatment process in which microorganisms in the water to be treated are removed by the first module M1 and scale is removed by the second module M2. This first treatment process is an optimum treatment operation when a large amount of microorganisms and scales are mixed in the water to be treated.

  In this case, the controller C applies a positive potential (+) to the electrode (first electrode) 6 of the first module M1 as shown in 1 of FIG. A negative potential (−) is applied to the second electrode (7), a negative potential (−) is applied to the electrode (first electrode) 6 of the second module M1, and the electrode (second electrode) 7 is applied. Apply a positive potential (+). Thereby, the carbon fiber 8 of the first module M1 becomes a positive potential (+), and the carbon fiber 8 of the second module M2 becomes a negative potential (−). At this time, the controller applies a potential to the electrodes 6 and 7 of the first module M1 with a high current value in a range up to a value below 60 mA (milliampere) and lower than the current at which the carbon fiber 8 melts. Apply. The potential applied to the electrodes 6 and 7 of the second module M2 may be a current value lower than 60 mA, or a value lower than the current at which the carbon fiber 8 melts in the same manner as the first module M1. Even a high current value in the range up to can be used.

  Further, the controller C opens the valve V1, starts the pump P1, opens the valve V2, and closes the valve V3. As a result, the water to be treated containing microorganisms and scale components from the stock solution tank 100 sequentially passes through the filter 101, the pump P1, the valve V1, and the flow meter F1, and then the water treatment apparatus 1 from the inlet 3 formed at the lower end of the case 5. It flows into the processing chamber 15. Thereby, the electrode 6, the carbon fiber 8, the spacer 9, and the electrode 7 of each module M1, M2 in the processing chamber 15 are immersed in the water to be processed.

  The treated water that has flowed into the processing chamber 15 is first passed through the first module M1, and sequentially passes through the electrode 6, the carbon fiber 8, the spacer 9, and the electrode 7 of the first module M1. At this time, in the first module M <b> 1, microorganisms such as bacteria and molds contained in the water to be treated are collected in the process of passing through the carbon fibers 8.

  Further, when a potential is applied to the electrodes 6 and 7 of the first module M1 within the range of the current value, the electrode 6 on the upstream side of the flow path of the water to be treated and the electrode 6 are electrically connected. The carbon fiber 8 becomes an anode, and the downstream electrode 7 becomes a cathode.

  Here, since microorganisms are generally charged at a negative potential, the microorganisms are attracted to the carbon fiber 8 having a positive potential. Microorganisms are electrostatically adsorbed or adhered to the carbon fibers 8 positively and efficiently.

Furthermore, when a potential is applied to the electrodes 6 and 7 as described above in the first module M1, water electrolysis occurs. That is, in the electrode 6 and the carbon fiber 8 of the first module M1 serving as the anode,
2H ₂ O → 4H ⁺ + O ₂ + 4e ⁻
In the electrode 7 serving as the cathode,
4H ⁺ + 4e ⁻ + (4OH ⁻ ) → 2H ₂ + (4OH ⁻ )
At the same time, the chloride ions contained in the water to be treated
2Cl ⁻ → Cl ₂ + 2e ⁻
In addition, this Cl ₂ reacts with water,
Cl ₂ + H ₂ O → HClO + HCl
It becomes.

  In this configuration, sterilizing water containing HClO (hypochlorous acid) having high sterilizing power can be generated by energizing the electrodes 6 and 7 of the first module M1. This HClO can effectively kill microorganisms in the water to be treated.

  That is, in addition to the effect of effectively killing microorganisms in the water to be treated by HClO by applying a potential to the electrodes 6 and 7 of the first module M1 so as to have a high current value of 60 mA or more, the electrodes By energizing 6 and 7, the microorganisms of the water to be treated can be electrocuted and killed. Thereby, the treatment efficiency of the microorganisms in the water to be treated is dramatically improved, and the microorganisms in the water to be treated can be sufficiently removed only by flowing the water to be treated once through the first module M1. .

  In addition, by applying a high current value, the chlorine generated by the electrolytic treatment increases and the chlorine odor causes an inconvenience of giving an unpleasant feeling. However, the surface area of the electrode 6 is increased by disposing the carbon fiber 8 in an energized state on the upper surface on the downstream side of the flow path of the electrode 6 as in the present invention and making the carbon fiber 8 a part of the electrode. Even when a current value is applied, the current density is reduced, and as a result, the amount of hypochlorous acid generated can be reduced.

  That is, since the amount of hypochlorous acid generated is proportional to the current density, excessive carbon dioxide can be prevented from being generated by the presence of the carbon fiber 8 as in the present invention even when a large current is passed. Become. Thereby, generation | occurrence | production of a chlorine odor can be suppressed now. On the other hand, as described above, electrocution of microorganisms can be promoted by a large current. Therefore, according to the present invention, microorganisms can be effectively sterilized while suppressing generation of chlorine odor, so that the treatment ability of microorganisms can be remarkably improved. Furthermore, as described above, the structure in which the electrode 6 does not come out of the carbon fiber 8 in the cross-sectional direction of the flow path has a disadvantage that excessively hypochlorous acid is generated by direct energization between the electrodes 6 and 7. Can be resolved. Thereby, generation of chlorine odor can be further suppressed.

The treated water from which microorganisms have been removed in the first module M1 is then passed through the second module M2 and sequentially passes through the electrode 6, the carbon fiber 8, the spacer 9, and the electrode 7. Then, by energizing the electrodes 6 and 7 of the second module M2 described above, in the second module M2, the electrode 6 and the carbon fiber 8 on the upstream side of the flow path of the water to be treated become the cathode, and the downstream side The resulting electrode 7 becomes the anode. Thereby, in the electrode 6 and the carbon fiber 8 of the second module M2 serving as the cathode,
4H ⁺ + 4e ⁻ + (4OH ⁻ ) → 2H ₂ + (4OH ⁻ )
In the electrode 7 serving as the anode,
2H ₂ O → 4H ⁺ + O ₂ + 4e ⁻
Reaction occurs.

As described above, hydroxide ions (OH ⁻ ) are generated at the electrode 6 and the carbon fiber 8 of the second module M2 that becomes the cathode. Since the hydroxide ion is a very strong base, the periphery of the electrode 6 and the carbon fiber 8 of the second module M2 is locally alkaline. Thereby, the hardness component in to-be-processed water reacts with the said hydroxide ion, and turns into a salt. Specifically, ions such as calcium, magnesium, potassium, and silica, which are contained in the water to be treated and are the main scale components, are precipitated as hardly soluble salts such as calcium hydroxide, calcium carbonate, and magnesium hydroxide. . When ions such as phosphorus, sulfur and zinc are contained in the water to be treated, calcium sulfate, calcium sulfite, calcium phosphate, zinc phosphate, zinc hydroxide, basic zinc carbonate and the like may be precipitated as salts. Note that some of the ions such as calcium, magnesium, potassium, and silica, which are scale components, are directly deposited on the electrode 6 and the carbon fiber 8 of the second module M2 by the electrodeposition.

  Further, each salt (ie, scale) deposited on the electrode 6 and the carbon fiber 8 of the second module M2 flows into the porous spacer 9 located on the downstream side of the flow path of the water to be treated of the carbon fiber 8. To the spacer 9. As described above, the salt (scale) deposited on the electrode 6 and the carbon fiber 8 of the second module M2 can be added to the electrode 6 and the carbon fiber 8 and recovered by the spacer 9. In addition, a spacer 9 is installed between the carbon fiber 8 and the electrode 7 located on the downstream side thereof, and the water to be treated is circulated from the electrode 6 serving as the cathode and the electrode 7 serving as the anode from the carbon fiber 8 side. The scale deposited on the fiber 8 side can be efficiently recovered by the spacer 9.

  Further, as described above, the electrodes 6 and 7, the carbon fibers 8, and the spacer 9 have a water-permeable structure, and the spacer 9 is an insulator, so that the water to be treated can be circulated without any trouble while the spacer 9 is used. Scale can be recovered.

  In addition, a spacer 9 is installed between the carbon fiber 8 and the electrode 7, and the water to be treated is allowed to flow from the carbon fiber 8 side serving as the cathode to the electrode 7 side serving as the anode, thereby being deposited on the electrode 6 and the carbon fiber 8. It is possible to avoid as much as possible that the scales adhered to the electrodes 6 and the carbon fibers 8. In particular, when the flow rate of the water to be treated is high, the scale once attached to the electrode 6 or the carbon fiber 8 is easily peeled off, and the peeled scale is collected by the spacer 9 disposed on the downstream side of the carbon fiber 8. Can do. Thereby, a scale adheres to the electrode 6 and the carbon fiber 8, and the disadvantage that a short circuit between the electrodes 6 and 7 is caused by this scale can be eliminated as much as possible. Further, the deterioration of the electrodes 6 and 7 can be suppressed as much as possible.

  And the to-be-processed water from which the scale component was removed after passing through the second module M2 exits the processing chamber 15 from the outlet 4 and enters the pipe L2, and is stored in the processing liquid tank 110 through the valve V2. .

  As described above, a positive potential is applied to the other electrode 6 of the first module M1, a negative potential is applied to the one electrode 7, and a negative potential is applied to the other electrode 6 of the second module M2. By applying a positive potential to one electrode 7, microorganisms can be efficiently removed by the first module M1, and the scale can be removed by the second module M2.

(2) Another first treatment process In the first treatment process, when the treatment water contains a large amount of microorganisms and scales, the first module M1 removes the microorganisms from the treatment water. The controller C controls the energization of the electrodes 6 and 7 so that the scale is removed by the second module M2, but the first treatment process is performed by any one of the modules. As long as the other module can remove the scale, the scale is not limited to the above, but the first module M2 may remove the scale, and the second module M1 may remove the microorganisms from the water to be treated. There is no problem.

  In this case, the controller C applies a negative potential (−) to the electrode 6 of the first module M1 and a positive potential (+) to the electrode 7 as shown in 1 of FIG. 3 (lower column of 1 in FIG. 3). Is applied, a positive potential (+) is applied to the electrode 6 of the second module M1, and a negative potential (-) is applied to the electrode 7. Thereby, the carbon fiber 8 of the first module M1 becomes a negative potential (−), and the carbon fiber 8 of the second module M2 becomes a positive potential (+). At this time, the controller applies a potential to the electrodes 6 and 7 of the second module M2 with a high current value in a range up to a value below 60 mA (milliampere) and below the current at which the carbon fiber 8 melts. Apply. The potential applied to the electrodes 6 and 7 of the first module M1 may be a current value lower than 60 mA, or a value lower than the current at which the carbon fiber 8 melts in the same manner as the second module M2. Even a high current value in the range up to can be used.

  Further, the controller C opens the valve V1, starts the pump P1, opens the valve V2, and closes the valve V3. As a result, the water to be treated containing microorganisms and scale components from the stock solution tank 100 sequentially passes through the filter 101, the pump P1, the valve V1, and the flow meter F1, and then the water treatment apparatus 1 from the inlet 3 formed at the lower end of the case 5. It flows into the processing chamber 15. Thereby, the electrode 6, the carbon fiber 8, the spacer 9, and the electrode 7 of each module M1, M2 in the processing chamber 15 are immersed in the water to be processed.

The treated water that has flowed into the processing chamber 15 is first passed through the first module M1, and sequentially passes through the electrode 6, the carbon fiber 8, the spacer 9, and the electrode 7 of the first module M1. Then, by energizing the electrodes 6 and 7 of the first module M1 described above, the electrode 6 and the carbon fiber 8 on the upstream side of the flow path of the water to be treated become a cathode, and the electrode 7 on the downstream side becomes an anode. . Thereby, in the electrode 6 and the carbon fiber 8 of the first module M1 serving as the cathode,
4H ⁺ + 4e ⁻ + (4OH ⁻ ) → 2H ₂ + (4OH ⁻ )
In the electrode 7 serving as the anode,
2H ₂ O → 4H ⁺ + O ₂ + 4e ⁻
Reaction occurs.

As described above, hydroxide ions (OH ⁻ ) are generated at the electrode 6 and the carbon fiber 8 of the first module M1 that becomes the cathode. Since the hydroxide ion is a very strong base, the periphery of the electrode 6 and the carbon fiber 8 of the second module M2 is locally alkaline. Thereby, the hardness component in to-be-processed water reacts with the said hydroxide ion, and turns into a salt. Specifically, ions such as calcium, magnesium, potassium, and silica, which are contained in the water to be treated and are the main scale components, are precipitated as hardly soluble salts such as calcium hydroxide, calcium carbonate, and magnesium hydroxide. . When ions such as phosphorus, sulfur and zinc are contained in the water to be treated, calcium sulfate, calcium sulfite, calcium phosphate, zinc phosphate, zinc hydroxide, basic zinc carbonate and the like may be precipitated as salts. Note that some of the ions such as calcium, magnesium, potassium, and silica, which are scale components, are also directly deposited on the electrode 6 and the carbon fiber 8 of the first module M1 by electrodeposition.

  Moreover, each said salt (namely, scale) deposited on the electrode 6 and the carbon fiber 8 of the first module M1 flows to the spacer 9 located on the downstream side of the flow path of the water to be treated of the carbon fiber 8, It adheres to the spacer 9. As described above, the salt (scale) deposited on the electrode 6 and the carbon fiber 8 of the first module M1 can be added to the electrode 6 and the carbon fiber 8 and recovered by the spacer 9. In addition, a spacer 9 is installed between the carbon fiber 8 and the electrode 7 located on the downstream side thereof, and the water to be treated is circulated from the electrode 6 serving as the cathode and the electrode 7 serving as the anode from the carbon fiber 8 side. The scale deposited on the fiber 8 side can be efficiently recovered by the spacer 9.

  Further, as described above, the electrodes 6 and 7, the carbon fibers 8, and the spacer 9 have a water-permeable structure, and the spacer 9 is an insulator, so that the water to be treated can be circulated without any trouble while the spacer 9 is used. Scale can be recovered.

  In addition, a spacer 9 is installed between the carbon fiber 8 and the electrode 7, and the water to be treated is allowed to flow from the carbon fiber 8 side serving as the cathode to the electrode 7 side serving as the anode, thereby being deposited on the electrode 6 and the carbon fiber 8. It is possible to avoid as much as possible that the scales adhered to the electrodes 6 and the carbon fibers 8. In particular, when the flow rate of the water to be treated is high, the scale once attached to the electrode 6 or the carbon fiber 8 is easily peeled off, and the peeled scale is collected by the spacer 9 disposed on the downstream side of the carbon fiber 8. Can do.

  The treated water from which the scale has been removed in the first module M1 is then passed through the second module M2 and sequentially passes through the electrode 6, the carbon fiber 8, the spacer 9, and the electrode 7. At this time, in the second module M2, microorganisms such as bacteria and fungi contained in the water to be treated are collected in the process of passing through the carbon fiber 8.

  Further, when a potential is applied to the electrodes 6 and 7 of the second module M2 within the range of the current value, in the second module M2, the electrodes 6 that are upstream of the flow path of the water to be treated and the electrodes The carbon fiber 8 electrically connected to 6 serves as an anode, and the downstream electrode 7 serves as a cathode.

  Here, since microorganisms are generally charged at a negative potential, the microorganisms are attracted to the carbon fiber 8 having a positive potential. Microorganisms are electrostatically adsorbed or adhered to the carbon fibers 8 positively and efficiently.

Furthermore, when a potential is applied to the electrodes 6 and 7 as described above in the second module M2, electrolysis of water occurs. That is, in the electrode 6 and the carbon fiber 8 of the first module M1 serving as the anode,
2H ₂ O → 4H ⁺ + O ₂ + 4e ⁻
In the electrode 7 serving as the cathode,
4H ⁺ + 4e ⁻ + (4OH ⁻ ) → 2H ₂ + (4OH ⁻ )
At the same time, the chloride ions contained in the water to be treated
2Cl ⁻ → Cl ₂ + 2e ⁻
In addition, this Cl ₂ reacts with water,
Cl ₂ + H ₂ O → HClO + HCl
It becomes.

  In this configuration, sterilizing water containing HClO (hypochlorous acid) having high sterilizing power can be generated by energizing the electrodes 6 and 7 of the second module M2. This HClO can effectively kill microorganisms in the water to be treated.

  Furthermore, in the present embodiment, as described above, the energization to the electrodes 6 and 7 of the second module M2 has a current value higher than 60 mA, so that the water to be treated is energized by energizing each electrode 6 and 7. Can cause electric shock and kill.

  That is, in addition to the effect of effectively killing microorganisms in the water to be treated with HClO by applying a potential to the electrodes 6 and 7 of the second module M2 so as to have a high current value of 60 mA or more, the electrodes By energizing 6 and 7, the microorganisms of the water to be treated can be electrocuted and killed. Thereby, the treatment efficiency of the microorganisms in the water to be treated is dramatically improved, and the microorganisms in the water to be treated can be sufficiently removed only by flowing the water to be treated once through the second module M2. .

  Moreover, by providing the carbon fiber 8 as described in the first treatment process, generation of chlorine odor can be suppressed even when a large current is passed, and electrocution of microorganisms can be promoted by the large current. . Therefore, according to the present invention, microorganisms can be effectively sterilized while suppressing generation of chlorine odor, so that the treatment ability of microorganisms can be remarkably improved. Furthermore, as described above, the structure in which the electrode 6 does not come out of the carbon fiber 8 in the cross-sectional direction of the flow path has a disadvantage that excessively hypochlorous acid is generated by direct energization between the electrodes 6 and 7. Can be resolved. Thereby, generation of chlorine odor can be further suppressed.

  And the to-be-processed water from which microorganisms were removed by passing through the second module M2 exits the processing chamber 15 from the outlet 4 and enters the pipe L2, and is stored in the processing liquid tank 110 through the valve V2.

  As described above, a negative potential is applied to the other electrode 6 of the first module M1, a positive potential is applied to the one electrode 7, and a positive potential is applied to the other electrode 6 of the second module M2. By applying a negative potential to one of the electrodes 7, the scale can be removed by the first module M1, and the microorganisms can be efficiently removed by the second module M2.

(3) Second treatment process On the other hand, the scale component is hardly contained in the water to be treated, or the removal of the scale component is unnecessary, and a large amount of microorganisms is contained in the water to be treated. If it is feared that it is not sufficient to treat microorganisms with this module, it is desirable to remove the microorganisms in the water to be treated with both modules M1 and M2. That is, in the water treatment system S of the present embodiment, the ATP concentration detected by the ATP measuring meter of the measuring meter 130 is set higher than the predetermined value a1, and the conductivity detected by the conductivity meter is set lower than the value b1. If the predetermined value b2 (ie, the conductivity is lower than b1> b2), the controller C executes a second treatment process for removing microorganisms in both the first and second modules M1 and M2.

  In this case, the controller C applies a positive potential (+) to the electrodes 6 of both modules M1 and M2 and applies a negative potential (−) to the electrodes 7 as shown at 2 in FIG. Thereby, the carbon fiber 8 of both modules M1 and M2 becomes a positive potential (+). Then, similarly to the first treatment process, the controller C opens the valve V1, starts the pump P1, opens the valve V2, closes the valve V3, and feeds the water to be treated from the stock solution tank 100 from the water flow port 3. After flowing into the treatment chamber 15 of the water treatment apparatus 1 and sequentially passing the water through the first module M1 and the second module M2, it is caused to flow out of the treatment chamber 15 of the water treatment apparatus 1 through the outlet 4. Both modules M1 and M2 can efficiently remove microorganisms in the water to be treated. Note that the microorganism removal operation in each of the modules M1 and M2 is the same as the microorganism removal operation in each process described above, and thus the description thereof is omitted.

(4) Third treatment process Moreover, the microorganisms are hardly contained in the water to be treated, or the removal of microorganisms is unnecessary, and a large amount of scale is contained in the water to be treated. If there is a possibility that it is not sufficient to simply treat the scale at, it is desirable to remove the scale in the water to be treated by both modules M1 and M2. That is, in the water treatment system S of the present embodiment, the ATP concentration detected by the ATP measuring meter of the measuring meter 130 is lower than a predetermined concentration a2 set lower than the value a1 (that is, the ATP concentration is a1> a2). When the conductivity detected by the conductivity meter is higher than the predetermined value b1, the controller C executes a third processing process for removing the scale in both the first and second modules M1 and M2.

  In this case, the controller C applies a negative potential (−) to the electrodes 6 of both modules M1 and M2 and applies a positive potential (+) to the electrodes 7 as indicated by 3 in FIG. Thereby, the carbon fiber 8 of both modules M1 and M2 becomes a negative potential (-). Then, the controller C opens the valve V1 and starts the pump P1 in the same manner as the above-described processing processes, and also opens the valve V2 and closes the valve V3, so that the water to be treated from the stock solution tank 100 is fed from the water outlet 3 to the water treatment device. The first module M1 and the second module M2 are sequentially flowed into the first treatment chamber 15, and then flowed out from the treatment chamber 15 of the water treatment apparatus 1 through the outlet 4, whereby both modules M1 , M2 can efficiently remove the scale in the water to be treated. Note that the scale removing operation in each of the modules M1 and M2 is the same as the scale removing operation of the first processing process described above, and the description thereof is omitted.

(5) Fourth treatment process Next, there is almost no scale component in the treated water, or the removal of the scale component is unnecessary, and only the microorganisms in the treated water are to be removed. A case will be described in which microorganisms can be sufficiently removed by simply passing water to be treated through one of the modules. In the water treatment system S of this embodiment, the ATP concentration detected by the ATP measurement meter of the measurement meter 130 is lower than the a1 and higher than the a2, and the conductivity of the water to be treated detected by the conductivity meter. Is lower than b2, the controller C executes a fourth treatment process for removing microorganisms only by the first module M1.

  In this case, the controller C applies a positive potential (+) to the electrode 6 of the first module M1 and applies a negative potential (-) to the electrode 7 as indicated by 4 in FIG. Thereby, the carbon fiber 8 of the first module M1 has a positive potential (+). At this time, the controller C does not energize the electrodes 6 and 7 of the second module M2.

  The controller C opens the valve V1, starts the pump P1, closes the valve V2, and opens the valve V3. As a result, the water to be treated from the stock solution tank 100 is passed through the first module M1. And after the microorganisms in to-be-processed water are removed in this 1st module M1, the to-be-processed water which came out of the 1st module M1 flows into the outflow port 40 side by opening said valve V3, and the said outflow port 40 concerned More out of the processing chamber 15. The microorganism removal operation in the first module M1 is the same as the microorganism removal operation in each process described above, and thus the description thereof is omitted.

(6) Fifth treatment process Next, the microorganisms are hardly contained in the water to be treated, or the removal of microorganisms is unnecessary and only the scale in the water to be treated is to be removed. The case where the scale can be removed sufficiently by simply passing the water to be treated through one of the modules will be described. In the water treatment system S of the present embodiment, the ATP concentration detected by the ATP measuring meter of the measuring meter 130 is lower than the a2, and the conductivity of the water to be treated detected by the conductivity meter is higher than the b1. If it is lower and higher than b2, the controller C executes the fifth processing process for removing the scale only by the first module M1.

  In this case, the controller C applies a negative potential (−) to the electrode 6 of the first module M1 and applies a positive potential (+) to the electrode 7 as indicated by 5 in FIG. Thereby, the carbon fiber 8 of the first module M1 becomes a negative potential (−). At this time, the controller C does not energize the electrodes 6 and 7 of the second module M2.

  The controller C opens the valve V1, starts the pump P1, closes the valve V2, and opens the valve V3. As a result, the water to be treated from the stock solution tank 100 is passed through the first module M1. And after the microorganisms in to-be-processed water are removed in this 1st module M1, the to-be-processed water which came out of the 1st module M1 flows into the outflow port 40 side by opening said valve V3, and the said outflow port 40 concerned More out of the processing chamber 15. The scale removal operation in the first module M1 is the same as the scale removal operation in each process described above, and thus the description thereof is omitted.

  As described above in detail, the water treatment apparatus 1 of the water treatment system S of the present invention makes it possible to remove microorganisms and scale components in the water to be treated in one case 5. Furthermore, an efficient water treatment can be realized by freely selecting an object to be treated according to the properties of the water to be treated. In particular, based on the output of the detection means (in this embodiment, the ATP measuring meter and the conductivity meter of the measuring meter 130) for detecting the microbial amount and scale amount of the water to be treated as in the present embodiment, the controller C performs the first and first operations. 2, by applying electricity to the electrodes 6 and 7 of the modules M1 and M2 and controlling the valves (particularly, the valves V2 and V3), it is possible to perform an optimal treatment according to the amount of microorganisms and scale of the water to be treated. It becomes possible.

(7) Washing process By the way, when a large amount of scales or microorganisms adhere to the spacers 9, the carbon fibers 8, etc., due to the water treatment operation by the water treatment apparatus 1, there is a risk of hindering the flow of the treated water. There is a need to remove them. In this case, the controller C switches the polarities of the electrodes 6 and 7 of the modules M1 and M2, and sets the potential so that the current value that has been applied to the electrodes 6 and 7 or a current value higher than that has been applied. Apply.

  For example, immediately before the cleaning process, the first treatment process shown in the upper column of FIG. 3, that is, the positive potential (+) is applied to the electrode 6 and the carbon fiber 8 of the first module M1, and the negative potential is applied to the electrode 7. When (−) is applied and a negative potential (−) is applied to the electrode 6 and the carbon fiber 8 of the second module M2, and a positive potential (+) is applied to the electrode 7, the cleaning module performs the first module. A negative potential (−) is applied to the electrode 6 and the carbon fiber 8 of M1, and a positive potential (+) is applied to the electrode 7, and a positive potential (+) is applied to the electrode 6 and the carbon fiber 8 of the second module M2. A negative potential (-) is applied.

  At this time, a potential is applied to each of the electrodes 6 and 7 of both modules M1 and M2 at a high current value in a range up to a value below 60 mA (milliampere) and below the current at which the carbon fiber 8 melts. Thereby, HClO (hypochlorous acid) is produced | generated by both modules M1 and M2, and microorganisms die by this HClO. Furthermore, by changing the polarities of the electrodes 6 and 7, the scales and microorganisms attached to the spacers 9, the carbon fibers 8, etc. are peeled off.

  The scales and microorganisms peeled off flow into the processing liquid tank 110 through the pipe L2, and are discharged from the processing liquid tank 110 to the outside through the pipe L5 by the operation of the pump P2. Thus, the scales adhering to the spacers 9 and the carbon fibers 8 of the modules M1 and M2 can be washed away, and the clogging of the spacers 9 and the carbon fibers 8 can be eliminated. In this way, the polarity of the electrodes 6 and 7 of the modules M1 and M2 is switched in the cleaning process, and the current value that has been applied to the electrodes 6 and 7 or a current value that has been applied to the electrodes 6 and 7 is obtained. By applying a potential, the modules M1 and M2 can be cleaned, and it is possible to ensure a good flow of treated water for a long period of time and extend the replacement time of the modules M1 and M2. It becomes.

  In the cleaning process of this embodiment, the polarities of the electrodes 6 and 7 of the modules M1 and M2 are switched, and the current value that has been applied to the electrodes 6 and 7 or a current value that has been applied so far is obtained. In this way, the modules M1 and M2 are cleaned by applying a potential in this way, but the present invention is not limited to this, and the cleaning water is distributed to the modules M1 and M2 in the direction opposite to the flow path of the water to be treated. By doing so, the modules M1 and M2 can be configured to be washed.

  That is, cleaning water is introduced into the treatment chamber 15 of the water treatment apparatus 1 from the outlet 4, and the second module M 2 is connected to the electrode 7, the spacer 9, the carbon fiber 8, the electrode 6, and the first module M 1. If the electrodes 7, the spacers 9, the carbon fibers 8, and the electrodes 6 are circulated in this order, each of the modules M 1 and M 2 is subjected to a flow in a direction opposite to the flow direction of the water to be treated. The scales adhering to the spacers 9 and the carbon fibers 8 can be washed away, and clogging of the spacers 9 and the carbon fibers 8 can be eliminated. As a result, the modules M1 and M2 can be cleaned in the same manner as described above, and it is possible to ensure a good distribution of the water to be treated for a long time and to extend the replacement time of the modules M1 and M2. Become. The cleaning water may be hypochlorous acid water or the like, or the water to be treated itself treated in the water treatment apparatus 1 and stored in the treatment liquid tank 110. Absent.

  In the water treatment apparatus 1 of the first embodiment, the water passage for passing water to the first module M1 and the second module M2 in the treatment chamber 15 of the water treatment apparatus 1 through the pipe L1 and the inflow port 3. Was assumed to be configured. In such a configuration, the water to be treated that is passed through the second module M2 becomes the water to be treated that has passed through the first module M1, and the water to be treated cannot be passed through only the second module M2.

  Therefore, as shown in FIG. 4, a water passage 50 for passing water through the second module M <b> 2 is provided, and the water to be treated flows into the water treatment apparatus 1 from the water passage 50 as shown by an arrow in FIG. 4. Thus, the water to be treated can be passed only by the second module M2 without passing the water to be treated to the first module M1. In FIG. 4, the water passage 50 includes an inlet 30, a pipe L <b> 6 connected to the inlet 30, and a valve V <b> 6 installed on the pipe L <b> 6. Thus, by providing the water passage 50 for passing water through the second module M2, the water to be treated is passed to the second module M2 without passing the water to be treated to the first module M1. Since water can be used, it is possible to avoid the uneven use of only the first module M1.

  Further, as shown by a broken line in FIG. 4, the middle portion of the pipe L2 and the upstream side of the valve V1 of the pipe L1 are connected by the pipe L7, and the water to be treated to the pipe L7 is connected to the connecting portion between the pipe L7 and the pipe L2. If a flow path control valve V7 (three-way valve or the like) that controls the inflow of water is provided and the water to be treated flowing through the pipe L2 is controlled to flow to the pipe L1 via the pipe L7 by the flow path control valve V7. It is also possible to pass the water to be treated through the second module M2 and then through the first module M1.

It is a schematic block diagram of the water treatment system of one Example to which this invention is applied (Example 1). It is a schematic block diagram of the water treatment apparatus of the water treatment system of FIG. It is a figure explaining the processing operation of the water treatment system of a present Example. It is a schematic block diagram of the water treatment apparatus of the other Example to which this invention is applied (Example 2).

Explanation of symbols

C Controller S Water treatment system 1 Water treatment device 3 Inlet 4, 40 Outlet 5 Case 6 Electrode (first electrode)
7 electrode (second electrode)
8 Carbon fiber 9 Porous spacer 10 Main body 12, 13 Lid member 15 Processing chamber 19 Fixing ring F1 Flow meter L1, L2, L3, L5, L6, L7 Piping M1 First module M2 Second module P1, P2 Pump V1 , V2, V3, V4, V6, V7 valves

Claims (4)

  A first electrode having water permeability disposed in a flow path of the water to be treated; a carbon fiber that is located downstream of the first electrode and is energized by the first electrode; and A water-permeable second electrode that is paired with the first electrode and a non-conductive porous spacer interposed between the second electrode and the carbon fiber are provided on the downstream side. A water treatment apparatus comprising first and second modules.   The water treatment apparatus according to claim 1, wherein each module is configured to be capable of switching a potential applied to each electrode.   The first module is disposed on the upstream side of the second module in the flow path of the water to be treated, and a water passage that communicates with each module is provided between the modules. The water treatment apparatus according to any one of claims 1 and 2.   The water treatment apparatus according to any one of claims 1 and 2, a detection means for detecting a microbial amount and a scale amount of the water to be treated, and a first and a second of the water treatment apparatus based on an output of the detection means A water treatment system comprising: control means for controlling energization to the electrodes of the second module.

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