Water treatment device and water treatment system

Abstract

To provide a water treatment apparatus and a water treatment system capable of maintaining high treatment performance at all times by securely detaching or killing microorganisms attached to the excess water and by making a useful microorganism Bacillus bacteria dominant.SOLUTION: A water treatment apparatus includes a flat plate and a removal unit. The flat plate is attached with microorganisms that purify raw water, and rotates so that a part of the flat plate itself is immersed in raw water. The removal unit removes a portion of the microorganisms from the flat plate so that the amount of microorganisms attached to the flat plate is maintained within an appropriate range.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] FIELD OF THE INVENTION Embodiments of the present invention relate to a water treatment device and a water treatment system. [Background technology]

[0002] In water treatment systems that purify organic wastewater containing organic matter, such as sewage, microorganisms are generally used. This type of biological treatment (hereinafter referred to as "microbial treatment") is used. One of the water treatment systems that utilizes this method is a water treatment system that uses the rotating disk method. Patent Document 1, Patent Document 2)

[0003] By making Bacillus bacteria dominant, the amount of excess sludge generated during the water treatment process can be reduced. It is known that it can suppress the generation of odors and has good organic matter and nitrogen removal performance. In addition, when a biological reactor using the activated sludge method is placed at the rear of the water treatment process, Since the load on the reaction tank can be reduced, the power consumption of the blower in the biological reaction tank can be significantly reduced. On the other hand, excessive adhesion of microorganisms to the disk-shaped plate is known to be a problem. If this happens, the microorganisms inside the disk-shaped plate will not be able to receive enough oxygen, and the raw water and the flat plate will not be able to be separated. This prevents contact with microorganisms inside the plate, significantly deteriorating the water purification performance of the plate. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-166038 [Patent Document 2] Japanese Patent Application Laid-Open No. 2007-301511 [Patent Document 3] Japanese Patent Application Laid-Open No. 2000-189991 Summary of the Invention [Problem to be solved by the invention]

[0005] The problem to be solved by the present invention is to reliably remove or kill excess attached microorganisms. At the same time, it allows the beneficial microorganism Bacillus to dominate, allowing for constant high treatment performance. The present invention provides a water treatment device and a water treatment system. [Means for solving the problem]

[0006] The water treatment device of the embodiment includes a flat plate and a removal unit. The flat plate rotates so that a portion of the flat plate is immersed in raw water, and microorganisms that purify the raw water adhere to the flat plate. The removal unit removes some of the microorganisms that have adhered to the flat plate. The removal unit has a microorganism killing means for killing a portion of the microorganisms attached to the flat plate by spraying high-temperature steam onto the portion of the flat plate that is not immersed in the raw water, thereby killing a portion of the microorganisms. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a diagram showing the configuration of a water treatment device according to a first embodiment, viewed from above. [Figure 2] 1 is a diagram showing the configuration of a water treatment device according to a first embodiment, as viewed from the raw water inlet side. [Figure 3] FIG. 2 is a diagram showing the configuration of a water treatment device according to Modification 1 of the first embodiment, as viewed from the raw water inlet side. [Figure 4] FIG. 10 is a diagram showing the configuration of a water treatment device according to Modification 1 of the first embodiment, as viewed from the side. [Figure 5] FIG. 10 is a diagram showing the configuration of a water treatment device according to Modification 2 of the first embodiment, as viewed from the raw water inlet side. [Figure 6] FIG. 10 is a diagram showing the configuration of a water treatment device according to a second embodiment, as viewed from the raw water inlet side. [Figure 7] FIG. 10 is a diagram showing the configuration of a water treatment device according to Modification 1 of the second embodiment, as viewed from the side. [Figure 8] FIG. 10 is a diagram showing the configuration of a water treatment device according to Modification 2 of the second embodiment, as viewed from the raw water inlet side. [Figure 9] FIG. 10 is a diagram showing the configuration of a disinfectant jetting unit in a water treatment device according to a second modification of the second embodiment. [Figure 10] FIG. 10 is a diagram showing the configuration of a water treatment system according to a third embodiment, as viewed from the raw water inlet side. [Figure 11] FIG. 10 is a diagram showing the configuration of a water treatment system according to a third embodiment, as viewed from above. [Figure 12] FIG. 10 is a block diagram showing the functional configuration of a control unit in a water treatment system according to a third embodiment. [Figure 13] FIG. 11 is a diagram showing the configuration of a water treatment system according to Modification 1 of the third embodiment, as viewed from above. [Figure 14] FIG. 13 is a block diagram showing the functional configuration of a control unit in the water treatment system according to a first modified example of the third embodiment. [Figure 15] FIG. 10 is a diagram illustrating the relationship between the amount of microorganisms attached to a flat plate and the motor current value obtained when the flat plate rotates, when the number of rotations per unit time is the same. [Figure 16] FIG. 11 is a diagram showing the configuration of a water treatment system according to a second modification of the third embodiment, as viewed from the side. [Figure 17] FIG. 13 is a block diagram showing the functional configuration of a control unit in a water treatment system according to a second modification of the third embodiment. [Figure 18] FIG. 13 is a diagram showing the configuration of a water treatment system according to a third modification of the third embodiment, as viewed from the side. [Figure 19] FIG. 13 is a block diagram showing the functional configuration of a control unit in a water treatment system according to a third modification of the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Representative embodiments will be described below with reference to the drawings. The embodiments are not limited to the following. In the following description, the same parts as those already explained are designated by the same reference numerals. Use the following to avoid redundant explanations.

[0009] (First embodiment) A water treatment device 100 according to a first embodiment will be described.

[0010] FIG. 1 is a diagram showing the configuration of a water treatment device 100 according to the first embodiment as viewed from above.

[0011] FIG. 2 shows the configuration of the water treatment device 100 according to the first embodiment as viewed from the inlet side of the raw water w. Figure.

[0012] The water treatment device 100 treats raw water such as sewage, agricultural wastewater, and organic wastewater such as industrial wastewater, This is a device that purifies water by microbial treatment using microorganisms such as Bacillus bacteria. As shown, the water treatment device 100 includes a water treatment tank 10, a flat plate 20, a rotating shaft 30, and a motor. 2, the water treatment device 100 includes a removal unit 50 and The system further includes a sludge extraction pipe 60 and a sludge extraction valve 70.

[0013] The water treatment tank 10 is a container into which raw water w is introduced, as shown in FIG. The downstream stage of the water treatment device 100 is not limited. The solid matter peeled off from the flat plate 20 is separated by settling, and the treated water x is discharged. Alternatively, a biological treatment process such as the conventional activated sludge method may be used in the subsequent stage. The "raw water w" refers to the water to be treated by the water treatment device 100. 0 includes water being treated. Also, "treated water x" refers to water treated by the water treatment device 100. This is what I mean.

[0014] A plurality of flat plates 20 are arranged in parallel at a fixed interval L in the water treatment tank 10. Each flat plate 20 is not entirely immersed in raw water, but has a lower surface. A part of it is immersed in raw water w, and the part above the part immersed in raw water w is in the gas phase. As a result, the upper side of each flat plate 20 is exposed to air. The lower side is immersed in raw water w. This is achieved by arranging the tank 10 horizontally at approximately the same height as the upper edge of the tank 10. As a result, even if the water treatment tank 10 is filled with raw water w, the lower half of the flat plate 20 Since only the upper half of the tube is immersed in raw water, at least the upper half of the tube is exposed to air. The surface of each plate 20 is coated with a material for preferentially attaching microorganisms such as Bacillus bacteria. The contact body is arranged. The contact body may be a fibrous contact body. The specific configuration is not particularly limited. In addition, the flat plate 20 has a large number of microorganisms. Each plate 20 is provided with a through hole in the center of the circle.

[0015] The rotary shaft 30 is inserted into a through hole at the center of a circle provided in each flat plate 20 and fixed therein. The flat plates 20 are arranged parallel to each other at a constant interval L along the longitudinal direction of the rotation shaft 30. will be done.

[0016] The motor 40 rotates the rotary shaft 30 by a driving force. 2, the rotating shaft 30 is rotated as a center. The rotation speed of the flat plate 20 is, for example, 10 rpm during normal operation of the water treatment device 100. In this way, each flat plate 20 rotates as indicated by the arrow R in FIG. By rotating the contactor, the microorganisms attached to the contactor absorb oxygen from the air and The nitrogen components in the raw water are also oxidized and converted into NOx. After that, the anaerobic microorganisms living inside each plate 20 cause a denitrification reaction, and nitrogen compounds are removed. As a result, the treated water x, which has had organic matter and nitrogen components removed from the raw water w, is However, as this purification operation continues, the contact The microorganisms adhering to the surface of the plate 20 grow. If the organisms grow excessively, the microorganisms attached to the plate 20 will not receive enough oxygen. Furthermore, due to insufficient oxygen, the anaerobic state of each plate 20 progresses, This may cause adverse effects such as increased odor or reduced transparency of the treated water. Therefore, when an excessive amount of microorganisms adheres to the flat plate 20, some of the microorganisms can be removed. It is necessary to reduce the amount of excess microorganisms by taking measures such as the above.

[0017] The removal unit 50 is configured to maintain the amount of microorganisms adhering to the flat plate 20 within an appropriate range. The removal unit 50 applies a physical action to the flat plate 20 to reduce the amount of excess microorganisms. As an example of adding the above, a blower 51 and an air diffuser 52 are provided.

[0018] The blower 51 is provided outside the water treatment tank 10 and sends air to the air diffuser 52 described later. .

[0019] The air diffuser 52 is installed below the flat plate 20 inside the water treatment tank 10. The surface of 52 is provided with many small holes, and the air supplied from the blower 51 When passing through these holes, the air bubbles rise in the raw water w and reach the flat plate located above the air diffuser 52. The microorganisms that are excessively attached to the flat plate 20 are subjected to a physical action by colliding with the flat plate 20. It is removed from the flat plate 20 by the collision of bubbles from below or by the upward flow generated by the bubbles. .

[0020] The sludge extraction pipe 60 is connected to the bottom surface of the water treatment tank 10 .

[0021] The sludge extraction valve 70 is provided in the sludge extraction pipe 60. By opening the sludge extraction valve 70, The microorganisms accumulated at the bottom of the water treatment tank 10 are drawn out of the water treatment tank 10 via the sludge extraction pipe 60. The sludge is discharged from the tank 10. The sludge withdrawal valve 70 is opened to allow the raw water W to be introduced into the water treatment tank 10. After the excess microorganisms are discharged from the water treatment tank 10, the sludge withdrawal valve 70 is stopped. The closing operation is performed, and the introduction of raw water w into the water treatment tank 10 is resumed.

[0022] Next, the operation of the removal unit 50 will be described.

[0023] The blower 51 of the removal unit 50 operates by receiving a command to clean the flat plate 20. When the blower 51 of the removal unit 50 is operated, bubbles are generated from the holes of the air diffuser 52, The plate 20 can now be cleaned.

[0024] The cleaning of the flat plate 20 with the air bubbles is carried out for a predetermined time (several minutes to continuous cleaning). The cleaning is performed while the flat plate 20 is rotating. The number of rotations of the flat plate 20 during cleaning may be set arbitrarily. During cleaning, it is desirable to stop the inflow of raw water w into the water treatment tank 10. The cleaning may be performed while the raw water w is flowing into the water treatment tank 10. If the inflow of raw water w has been stopped, the inflow of raw water w will be resumed at or after the end of cleaning. do.

[0025] The microorganisms removed from the flat plate 20 by the removal unit 50 are collected in the water treatment tank 10. The microorganisms may be discharged from the sludge extraction pipe 60. The released microorganisms are hydrolyzed directly in the water treatment tank 10, and no excess sludge is produced. Therefore, it is not necessary to discharge the microorganisms through the sludge extraction pipe 60.

[0026] The water treatment device 100 according to this embodiment can remove microorganisms excessively attached to the flat plate 20. This makes it possible to stabilize water treatment performance (prevent deterioration of treated water quality).

[0027] Furthermore, the water treatment device 100 according to this embodiment can reduce the amount of microorganisms excessively attached to the flat plate 20. Since the removal unit 50 can reduce the amount of contaminants, the workload of the maintenance manager of the water treatment facility can be reduced. This will enable reductions in workload and manpower.

[0028] (Modification 1 of the first embodiment) In the first modification of the first embodiment, unlike the first embodiment described above, the removal unit is a sprinkler. It is structured as follows.

[0029] FIG. 3 is a configuration of a water treatment device 200 according to the first modification of the first embodiment, as viewed from the side where raw water w is introduced. The water spray unit 151 of the removal unit 150 is disposed on the side or above the flat plate 20. When a cleaning command is received, a water sprinkler pump (not shown) is operated to rotate the flat plate 20 and By jetting a fluid such as water onto the plate 20, a physical action is applied to the plate 20. Thus, the surface of the flat plate 20 is peeled and cleaned by the flow of the fluid.

[0030] The angle at which the sprayed fluid, such as water, strikes the flat plate 20 can be adjusted by adjusting the position of the spray unit 151. By reducing the angle at which the jetted fluid hits the flat plate 20, Furthermore, the flow of the fluid is controlled according to the output of the watering pump. Since the speed can be increased, the peeling can be improved by cleaning with bubbles in the first embodiment. Removes the cotton-like biofilms formed by difficult microorganisms, such as Sphaerotilus natans In addition, when the area of ​​the flat plate 20 is large, it is possible to fix the water spray unit 1 at only one place. 51, uneven cleaning is likely to occur. It is desirable that the portion 151 be movable or be arranged in multiple locations.

[0031] FIG. 4 is a diagram showing the configuration of a water treatment device 200 according to a first modification of the first embodiment, as viewed from the side. FIG. 4 shows an example in which the water spray units 151 are arranged at multiple locations. The treatment device 200 is configured so that the water spraying units 151 are arranged at multiple locations, Both surfaces of the plates 20-1 to 20-8 can be uniformly cleaned. The housing may have a cover 80, and the water sprinkler unit 151 may be attached to the housing cover 80. As shown, multiple water spray units 151 for cleaning one flat plate 20 may be provided. Each of the plurality of spray units 151 has a valve, and the flow of the fluid sprayed from each spray unit 151 is controlled by the valve. The amount of fluid sprayed by the spray unit 151 may be adjustable. However, in order to minimize fluctuations in the water treatment load of the entire apparatus during cleaning, In other words, the fluid sprayed by the sprinkler unit 151 is preferably the raw water. It is desirable that w is treated water x that has been purified by microorganisms.

[0032] The microorganisms detached from the flat plate 20 are collected in the water treatment tank 10, and the microorganisms are then extracted with sludge. The microorganisms detached from the flat plate 20 may be discharged from the drain pipe 60. The microorganisms are hydrolyzed as they are and no excess sludge is generated, so they are discharged through the sludge extraction pipe 60. You don't have to put it out.

[0033] In this way, according to this modification, the removal effect of microorganisms is further improved, and the removal It is now possible to peel off the microbial film from the flat plate 20, which was previously difficult to do.

[0034] (Modification 2 of the first embodiment) In the second modification of the first embodiment, unlike the first embodiment described above, the removal part is a scraping part. This is the mechanism.

[0035] FIG. 5 is a configuration of a water treatment device 300 according to the second modification of the first embodiment, as viewed from the side where raw water w is introduced. As an example of applying a physical action to the flat plate 20, the removal unit 250 0 and scraping member 251 to remove microorganisms from the flat plate 20. The scraping member 251 is disposed near the flat plate 20 and, upon receiving a removal command, The scraping member 251 is pressed against the flat plate 20. The flat plate 20 is sometimes rotated, and excess fine particles adhering to the flat plate 20 due to the operation of the water treatment device 300 are removed. The organisms are scraped off and peeled off. The scraped off microorganisms are collected in the water treatment tank 10 and then The microorganisms may be discharged from the sludge extraction pipe 60. The microorganisms detached from the flat plate 20 may be discharged from the water The sludge is hydrolyzed directly in the treatment tank 10, and no excess sludge is generated. It is not necessary to discharge the sludge through the mud extraction pipe 60. If the excess microorganisms can be scraped off, The shape and material of the support member 251 are not particularly limited. For example, as shown in FIG. In this case, the scraping member 251 may be rotated around one end (the left end in the drawing) as a rotation fulcrum. The scraping member 251 is normally rotated counterclockwise to retract the scraping member 251 relative to the flat plate 20. When a removal command is received, the scraping member 251 is rotated clockwise. Excess microorganisms may be scraped off at the location indicated at 5.

[0036] As a further means for removing microorganisms from the flat plate 20, ultrasonic cleaning, vibration, etc. may be applied. In addition, the above-mentioned microorganism removal means may be used in any combination. In the first embodiment, microorganisms are removed from the plate 20 by applying a physical action to the plate 20. It is intended to remove

[0037] (Second embodiment) The second embodiment kills some of the microorganisms attached to the flat plate 20, reducing the amount of microorganisms. That is, as a part for removing excess microorganisms, the excess microorganisms on the flat plate 20 are killed. It has a means for killing microorganisms.

[0038] FIG. 6 shows the configuration of a water treatment device 400 according to the second embodiment as viewed from the inlet side of raw water w. As shown in FIG. 6, the removal unit 350 of the water treatment device 400 of this embodiment is The steam ejection unit 351 is disposed near the flat plate 20 and is configured to receive a heating command. When the water is received, high-temperature steam s is sprayed onto the part of the flat plate 20 that is not immersed in the raw water w. The steam ejection part 351 ejects high-temperature steam s while rotating the flat plate 20. Therefore, it is possible to kill excess microorganisms on the flat plate 20. s refers to water vapor with a temperature of 65 degrees or higher (65°C or higher), but the temperature is around 100°C (almost The temperature at which most bacteria die is the most preferable. This is because it can only keep the Bacillus bacteria on the plate 20 alive and kill other microorganisms. Bacillus bacteria have the tendency to form spores, and the spores can be heated to temperatures above 100°C. Therefore, the periphery of the flat plate 20 is heated with high-temperature steam for 1 hour. When heated to around 00°C, excess microorganisms die, but only the bacillus spores survive.

[0039] The bacillus spores are formed when the steam ejection from the steam ejection part 351 is completed and the steam is released. With the supply of food and the right temperature, the bacteria germinate, become nutrient cells, and begin to purify the water. It is recommended to heat the plate for no more than 10 minutes per square centimeter. 0 It causes the non-excess microorganisms inside to die. Microorganisms killed by heating will die on their own. The particles naturally peel off from the flat plate 20 and are decomposed in water or by microorganisms attached to the flat plate 20 .

[0040] In this embodiment, water vapor is sprayed onto the surface of the flat plate 20 to grow microorganisms (bacteria) useful for water treatment. This makes it possible to keep only the bacteria (Lactobacillus subtilis) alive and remove other excess microorganisms.

[0041] In addition, since excess microorganisms adhering to the flat plate 20 can be removed, the water treatment performance can be improved. This allows for stabilization (preventing deterioration of treated water quality).

[0042] Furthermore, it is possible to reduce the workload of those who maintain and manage water treatment facilities (reducing the number of workers).

[0043] (Modification 1 of the second embodiment) In the second modification of the second embodiment, unlike the second embodiment described above, the removal unit is made of ultraviolet It is the irradiation mechanism.

[0044] FIG. 7 is a diagram showing the configuration of a water treatment device 500 according to a first modification of the second embodiment, as viewed from the side. As shown in FIG. 7, the water treatment device 500 of the first modified example of the second embodiment includes a removal unit 4 The removal unit 450 has an ultraviolet ray irradiation unit 451. The ultraviolet ray irradiation unit 451 of the removal unit 450 emits ultraviolet rays. The water treatment device 500 has an ultraviolet irradiation mechanism that can generate and irradiate ultraviolet light. The ultraviolet irradiation unit 451 may be attached to the housing cover 80. The irradiation unit 451 is disposed near the flat plate 20, and when an irradiation command is received, the ultraviolet irradiation unit 451 The UV light destroys the DNA of the microorganisms. Immediately after exposure to ultraviolet light, microorganisms undergo almost no change, but over time, As the UV light is applied, the excess microorganisms die. The dead microorganisms naturally fall back onto the plate. 0 and is decomposed by microorganisms in the raw water w or attached to the flat plate 20. The radiation dose is 3.8 mJ / cm to kill microorganisms. 2 It is desirable to do more than this.

[0045] (Modification 2 of the second embodiment) In the second modification of the second embodiment, unlike the second embodiment described above, the removal unit is It is an insertion mechanism.

[0046] FIG. 8 shows a configuration of a water treatment device 600 according to a second modification of the second embodiment, as viewed from the side where raw water w is introduced. The removal unit 550 includes, for example, a disinfectant tank 551 and a chemical injection pump 55. 2 and a disinfectant injection unit 553. The disinfectant tank 551 is a container for storing a disinfectant. The chemical injection pump 552 draws up the disinfectant from the disinfectant tank 551 and injects the disinfectant. The disinfectant injection unit 553 is a pump that sends disinfectant from the chemical injection pump 552 to the disinfectant inlet unit 553. The removal section 550 is a pipe for injecting the disinfectant into the water treatment tank 10 (tank). A disinfectant is injected into the water treatment tank 10 containing the water to kill excess microorganisms. Any disinfectant that can kill excess microorganisms may be used. Examples of disinfectants include chlorine-based disinfectants and amine-based disinfectants. These include, but are not limited to, antibacterial agents, iodine agents, hydrogen peroxide agents, and the like.

[0047] FIG. 9 shows the configuration of a disinfectant ejection unit in a water treatment device 600 according to a second modification of the second embodiment. The mechanism for adding the disinfectant to the water treatment tank 10 may be any method. The disinfectant is not limited to being directly injected by the disinfectant injection pump 552, but may be injected onto the surface of the flat plate 20 as shown in FIG. Alternatively, the water may be sprayed in a mist form onto the surface and directly sprayed thereon. This is the water treatment device of the second modified example of the second embodiment. By changing the configuration of 600 from the disinfectant injection section 553 to the disinfectant ejection section 653, The disinfectant ejection part 653 can eject the disinfectant onto the surface of the flat plate 20 in the form of a mist. It is a capable mechanism.

[0048] The water treatment device 600 according to the second modification of the second embodiment is particularly When a large amount of filamentous bacteria grows in the aeration tank downstream of Q10, bulking occurs. When filamentous bacteria grow in large numbers, the settling ability of sludge decreases significantly, and separation of treated water and sludge becomes difficult. In addition, if the filamentous bacteria adhere to the surface of the flat plate 20, The biofilm forms a microbial film that is very difficult to peel off. The biofilm grows and covers the entire surface of the plate 20. This reduces the air permeability and water permeability, leading to a decrease in water treatment performance. Polyethylene polyamine dimethyl ester is a disinfectant that has relatively little effect on beneficial microorganisms. Amine-epichlorohydrin polycondensates have already been developed, and these disinfectants have The disinfectant is added by the disinfectant injection mechanism, and it is possible to prevent a decrease in treatment performance due to the large-scale outbreak of filamentous fungi. Cut.

[0049] The second modification of the second embodiment is capable of removing filamentous fungi that have a negative effect on water treatment. become.

[0050] As a further means for killing microorganisms on the flat plate 20, ultrasonic crushing, drying treatment, etc. may be applied. In addition, the microorganism killing means of the second embodiment may be carried out in any combination. Furthermore, the microorganism removal means of the first embodiment and the microorganism killing means of the second embodiment may be used. Any combination of these may be performed, and by combining them, the process can be completed more efficiently in a shorter time. This effectively removes excess microorganisms.

[0051] (Third embodiment) The third embodiment further includes an imaging unit 82, and the image of the flat plate 20 captured by the imaging unit 82 is The function of the removal unit 750 is stopped depending on the image.

[0052] FIG. 10 shows the configuration of a water treatment system 700 according to the third embodiment as viewed from the inlet side of raw water w. FIG.

[0053] FIG. 11 is a diagram showing the configuration of a water treatment system 700 according to the third embodiment as viewed from above. be.

[0054] FIG. 12 shows the functional configuration of the control unit 90 in the water treatment system 700 according to the third embodiment. FIG.

[0055] In the water treatment system 700 of this embodiment, as illustrated in FIG. The upper part of the housing 10 is covered with a housing cover 80, and a space is formed inside the housing cover 80. An imaging unit 82, such as a CCD camera, is disposed in the gas phase unit 81. The water treatment system 700 of this embodiment is the same as the water treatment devices 100, 200 of the first embodiment. The removal unit 50, 150, 250 of the water treatment device of the second embodiment or the water treatment device of the second embodiment Similar to the removal units 350, 450, and 550 of the 600, the 600 also has a removal unit 750. is the removal unit 50, 150, 250 in the first embodiment or the removal unit in the second embodiment. The minimum is 350, 450, or 550.

[0056] As shown in FIGS. 10 and 11, the water treatment devices 100, 200, and 300 of the first embodiment Or the water treatment devices 400, 500, 600 according to the second embodiment and the water treatment device according to the third embodiment The difference from the water treatment system 700 according to the third embodiment is that the water treatment system 700 according to the third embodiment 10 shows the configuration in which the image capturing unit 82 is mounted on the housing cover. Although an example is shown in which the imaging unit 82 is fixed to the inner surface of the top plate of the housing cover 80, the imaging unit 82 is If the housing cover 80 is fixed to the inner surface of the side plate or if the housing cover 80 is in the gas phase section 81, It may also be fixed to a dedicated fixing member (not shown) outside.

[0057] In FIG. 11, the imaging unit 82 is shown as being removed from above the water treatment tank 10. However, this is just for convenience to avoid complicating the drawing. In reality, as shown in FIG. 10, the imaging unit 82 is provided on the upper side of the water treatment tank 10. It is being done.

[0058] The water treatment system 700 includes a removal unit 750, similar to the first or second embodiment. By this function, the amount of microorganisms attached to the surface of the plate 20 is reduced, and the amount of microorganisms attached to the surface of the adjacent plate 20 is reduced. The gap between adjacent plates becomes larger. The distance between adjacent plates 20 is L, and the distance between adjacent plates 20 when microorganisms are attached is , ΔL (L>ΔL).

[0059] The imaging unit 82 captures an image of the state of the flat plate 20 from above the flat plate 20 in the gas phase portion 81. The image information g of the captured flat plate 20 is input to the control unit 90 as shown in FIG. The image information g is output to the estimation unit 91. The image included in the image information g has a color tone that varies greatly depending on whether or not microorganisms are present. different.

[0060] The bioadhesion amount estimation unit 91 of the control unit 90 performs image analysis on such image information g. The amount of microorganisms is estimated by digitizing the image information g, and the average value by the removal unit 750 is calculated. The function of reducing the amount of microorganisms attached to the plate 20 may be stopped. For example, the removal unit 75 When microorganisms are killed by steam heating, the proteins contained in the microorganisms change color due to heat. This change in color indicates whether or not the stop condition set in advance in the stop necessity determining unit 92 of the control unit 90 has been met. If the values ​​are similar, a command to stop removal is issued, using the color information of the biofilm. The timing of stopping is controlled by using the RGB value as the color criterion. When the green and blue colors match the set values, it is determined that the microorganisms have been sufficiently killed and a command to stop removal is issued. do. The bioadhesion amount estimation unit 91 and the stop necessity determination unit 92 may be implemented using, for example, a processor. The processor is, for example, configured by a CPU (Central Processing Unit). The adhesion amount estimation unit 91 estimates the amount of adhesion based on a program stored in a memory or storage. In other words, the bioadhesion amount estimation unit 91 and the stop necessity determination unit 92 are software The functional units execute various programs. 2) Instead of a CPU, an ASIC (Application Specific Integrated Circuit) is used as a hardware function unit. IC Integrated Circuit) or FPGA (Field Programmable Gate Array) are used. These may be the biofouling amount estimation units 191, 291, and 391 and the stop necessity determination unit. The same applies to parts 192, 292, and 392.

[0061] Furthermore, the bioadhesion amount estimation unit 91 of the control unit 90 performs image analysis on such image information g. By performing the above and digitizing the image information g, the gap interval ΔL for each interval L is calculated. As mentioned above, the image included in the image information g may be estimated depending on whether or not there is a microorganism. Since the color tones of the adhesion particles are different, the adhesion amount estimation unit 91 uses the difference in color to determine the gap interval Δ L can be estimated easily and with high accuracy.

[0062] The biofouling amount estimation unit 91 further estimates that microorganisms grow uniformly, although there may be some variation. Based on this assumption, the number of attached microorganisms is calculated for each plate 20 by (L-ΔL) / 2. The thickness b can also be estimated. Since the gap spacing ΔL is highly accurate, the thickness b can also be estimated. Similarly, it is estimated with high accuracy.

[0063] The bioadhesion amount estimation unit 91 outputs the intervals ΔL of all gaps to the stop necessity determination unit 92. In addition to or instead of the gap distance ΔL, the film thickness b is used as the stoppage determination unit. 92. Furthermore, the image information g may be output to a display unit (not shown). This allows the operator to observe the image information g on the display unit, It is possible to visually grasp the degree of adhesion of microorganisms to the plate 20.

[0064] It should be noted that the digitization of the image information g does not necessarily have to be performed by the bioattachment amount estimation unit 91. Instead of being performed by the biofouling amount estimation unit 91, the measurement is performed by a function built into the imaging unit 82. Alternatively, it may be performed by the imaging unit 82 or another external computing device. When the external computing device performs the digitization, the imaging unit 82 or another external computing device that performed the digitization The result of the digitization is output to the biofouling amount estimation unit 91, and the biofouling amount estimation unit 91 For each interval L, the gap interval ΔL or the gap interval ΔL are calculated as described above. Determine the film thickness b.

[0065] The stoppage necessity determination unit 92 calculates the intervals ΔL of all the gaps output from the organism adhesion amount estimation unit 91. If the sum is equal to or greater than a predetermined value, the excess adhesion to the flat plate 20 is The microorganism removal unit 750 determines that the removed microorganisms have been removed, and outputs a removal stop command to the removal unit 750.

[0066] Alternatively, the stop necessity determining unit 92 may determine whether or not the stop necessity determining unit 92 determines ... A representative gap interval ΔL is selected from the above, and if the selected gap interval ΔL is equal to or greater than a predetermined value, If this is the case, it is determined that the removal unit 750 has removed the microorganisms excessively attached to the flat plate 20, and the removal is stopped. A command may be output.

[0067] As an example of selecting a typical gap interval ΔL, for example, as mentioned above, Based on the assumption that microorganisms grow uniformly despite variations, water treatment systems In 00, the gap between the two adjacent flat plates 20-4 and 20-5 on the central side is Δ L4 can be selected as the representative gap spacing ΔL.

[0068] Alternatively, the leftmost flat plate 20-1 and the second flat plate 20-2 from the left in FIG. The gap interval ΔL1 between the first and second electrodes 1 and 2 may be set as the representative gap interval ΔL. Since the water w is introduced into the water treatment tank 10 from the left side in FIG. This is because it is assumed that there are about 20 microorganisms attached to it.

[0069] The stop necessity determining unit 92 is configured to stop the removal unit 100 when the interval ΔL of the selected gap is equal to or greater than a predetermined value. Stop the function of reducing the amount of microorganisms attached to the plate 20 by 750, and stop the removal Outputs the command.

[0070] As an example of a specific criterion for determining whether or not the removal section needs to be stopped based on the interval ΔL of a single gap, When the distance L between the adjacent flat plates 20 is 5 cm, the gap distance ΔL is 4 cm or more. When the removal is stopped, a command to stop the removal is output.

[0071] As described above, the water treatment system 700 of this embodiment captures images using the imaging unit 82. The removal unit 750 determines the gap interval ΔL and the film thickness b estimated based on the image information g. It is possible to determine whether or not the function needs to be stopped.

[0072] In the water treatment system 700, the imaging unit 82 is disposed in the gas phase section 81, and Since the state of the plate 20 is captured, the captured image information g is clear. The gap ΔL and the film thickness b can be estimated with high accuracy, and the stoppage necessity determining unit 92 can It is possible to reliably determine whether or not the removal unit needs to be stopped.

[0073] In addition, since the imaging unit 82 is disposed in the gas phase portion 81 and not in water, washing of the imaging unit 82 is easy. Cleaning can be done automatically with a wiper, making it possible to operate almost maintenance-free. .

[0074] Furthermore, the image information g can be displayed on a display unit such as a display. The operator of the processing system 700 can confirm the image information g displayed on the display unit. This also makes it possible to visually grasp the degree of adhesion of microorganisms to the flat plate 20.

[0075] In this way, the water treatment system 700 of this embodiment has a configuration including the imaging unit 82. The amount of microorganisms excessively attached to the flat plate 20 is determined based on the image information g. Therefore, by determining whether the image pickup unit 82 has been removed, unnecessary maintenance due to the introduction of the image pickup unit 82 can be prevented. There is no need to worry about maintenance costs, labor savings, and improved operational efficiency. This makes it possible to simplify the configuration.

[0076] (Modification 1 of the third embodiment) The first modification of the third embodiment differs from the third embodiment in that the current is measured by an ammeter. The water treatment system 800 stops the function of the removal unit in response to the applied current.

[0077] FIG. 13 shows the configuration of a water treatment system 800 according to the first modification of the third embodiment, as viewed from above. 10 is a diagram showing the third embodiment of the water treatment system 800 according to the first modified example of the third embodiment. The difference in configuration from the water treatment system 700 in the above state is that the ammeter 41 is used instead of the imaging unit 82. The water treatment system 800 is the same as the water treatment system 70 according to the third embodiment. As in the case of the motor 40, the flat plate 20 is rotated by the motor 40. An ammeter 41 is connected to the motor 40. An ammeter 41 is connected to the motor 40, and continuously measures the motor current of the motor 40 when it is being driven.

[0078] FIG. 14 is a diagram illustrating a control unit 19 in a water treatment system 800 according to a first modification of the third embodiment. 1 is a block diagram showing the functional configuration of the ammeter 41. The ammeter 41 outputs the measured current value to the control unit 190. The result is output to the organism attachment amount estimation unit 191.

[0079] FIG. 15 shows the relationship between the amount of microorganisms attached to the flat plate 20 when the number of rotations per unit time is the same, and 10 is a diagram illustrating the relationship between the motor current value obtained when the flat plate 20 rotates. FIG.

[0080] When the amount of microorganisms attached to the flat plate 20 decreases, the torque required to rotate the flat plate 20 decreases. Therefore, as shown in the example of FIG. 15, the number of rotations per unit time is maintained at a constant number of rotations. When the amount of attached microorganisms decreases, the current value measured by the ammeter 41 decreases. The smaller the amount of attached microorganisms, the smaller the film thickness b of the flat plate 20 becomes.

[0081] The organism adhesion amount estimation unit 191 calculates the amount of adhesion by the ammeter 41 based on the relationship shown in FIG. From the current value measured by the current measurement, the amount of microorganisms adhering to the flat plate 20 is calculated as the amount of microorganisms adhering to the flat plate 20. The bioadhesion amount estimation unit 191 also estimates the estimated film thickness b of the attached microorganisms. b is output to a display unit (not shown), and the current value and film thickness b are output to the stop necessity determination unit 192. .

[0082] The operator can check the film thickness b estimated by the bioadhesion amount estimation unit 191 on the display unit. It is possible.

[0083] The stop necessity determining unit 192 determines whether the current value from the bioadhesion amount estimating unit 191 is equal to or less than the removal value shown in FIG. If the current is lower than the stop judgment current value, the amount of microorganisms excessively attached to the flat plate 20 has been sufficiently reduced. For example, the amount of microorganisms excessively attached to the flat plate 20 by the removal unit 750 is reduced. A removal stop command to stop the function is output to the removal unit 750.

[0084] (Modification 2 of the third embodiment) In the second modification of the third embodiment, unlike the third embodiment described above, the distance is measured by a rangefinder. This is a water treatment system that stops the function of the removal unit according to a set distance.

[0085] FIG. 16 shows the configuration of a water treatment system 900 according to the second modification of the third embodiment, as viewed from the side. As shown in FIG. 16, the water treatment tank 10 is covered with a housing cover 80. A laser range finder 83 is provided in the gas phase section 81 .

[0086] FIG. 17 shows the control unit 29 in the water treatment system 900 according to the second modification of the third embodiment. 8 is a block diagram showing the functional configuration of the laser range finder 83. The distance to the microorganisms adhering to the surface 20 is measured, and the measurement result is input to the control unit 290. The representative flat plate 20 is selected by the method described above. Based on the assumption that microorganisms grow uniformly, even if there is some variation, as shown in Figure 16, As shown, the central flat plate 20-4 can be taken as a representative example.

[0087] The bioadhesion amount estimation unit 291 estimates the amount of microorganisms attached based on the measurement results from the laser rangefinder 83. Since the location of the laser rangefinder 83 is known, the laser rangefinder 83 is used to estimate the amount of the laser beam. The distance and direction from the total 83 to the representative flat plate 20-4 are also known in advance. The angle corresponds to the irradiation angle θ (angle relative to the vertical direction) shown in Figure 16. The deposition amount estimation unit 291 measures the distance and direction from the laser range finder 83 to the representative plate 20-4. Using the position and the measurement results from the laser distance meter 83, the It is possible to estimate the film thickness b of the microorganisms present. A reflective photoelectric distance sensor can also be used. For example, infrared light is projected onto the surface of a representative flat plate 20-4, and the reflected light is received. Therefore, the distance to the surface of the flat plate 20-4 is measured. Even based on the measurement results obtained by such a photoelectric distance sensor, the results from the laser distance meter 83 As with the measurement results, the film thickness b of the microorganisms adhering to the representative flat plate 20-4 can be estimated. The bioadhesion amount estimation unit 291 outputs the estimated film thickness b to the stop necessity determination unit 292. To exert effort.

[0088] The stoppage necessity determining unit 292 determines whether or not the removal unit 750 is to remove the flat plate 20 based on the estimated film thickness b. It is judged whether or not it is necessary to stop the function of reducing the amount of microorganisms excessively attached to the surface. This has been described above, so the explanation will be omitted.

[0089] In this way, according to this modification, the laser distance meter 83 or the photoelectric distance sensor is applied. It is also possible.

[0090] In addition, in order to obtain information necessary for estimating the film thickness b of the microorganisms attached to the flat plate 20, The imaging unit 82, the laser distance meter 83, and the photoelectric distance sensor 84 may be used together. .

[0091] (Modification 3 of the third embodiment) In the third modification of the third embodiment, unlike the third embodiment described above, an imaging unit, a rangefinder, and a water treatment method in which the function of the removal unit is stopped according to the distance measured by the photoelectric distance sensor. It is a system.

[0092] FIG. 18 shows a configuration of a water treatment system according to a third modification of the third embodiment, as viewed from the side. As shown in FIG. 18, the water treatment tank 10 of the water treatment system 999 is 6, the upper part is covered with a housing cover 80, and an image pickup unit 82 is installed in a gas phase section 81. A laser distance meter 83 and a photoelectric distance sensor 84 are installed at known locations.

[0093] FIG. 19 shows the function of a control unit 390 in a water treatment system according to a third modification of the third embodiment. FIG. 1 is a block diagram showing a functional configuration.

[0094] The image capturing unit 82 outputs the image information g to the organism attachment amount estimation unit 391 of the control unit 390. As described above, the laser distance meter 83 measures the distance to the surface of the representative flat plate 20-4. The distance is output to the organism attachment amount estimation unit 391.

[0095] The photoelectric distance sensor 84 measures the distance to the surface of the representative flat plate 20-6 as follows: The result is output to the organism attachment amount estimation unit 391.

[0096] As described above, the biofouling amount estimation unit 391 calculates the amount of biofouling based on the image information input from the imaging unit 82. As described above, the film thickness b is estimated by the laser distance meter 83 and the photoelectric distance sensor 84. The film thickness b is also estimated from different measurement results input from

[0097] In this way, the biofouling amount estimation unit 391 can estimate three film thicknesses b simultaneously. Then, all three film thicknesses b estimated at the same time are output to the stoppage necessity determining unit 392.

[0098] The stop necessity determining unit 392 determines whether or not the stop is necessary by determining one of the three film thicknesses b output simultaneously, or If the average value is smaller than a predetermined value, a removal stop command is output.

[0099] By adopting such a configuration, the amount of microorganisms excessively attached to the flat plate 20 is reduced. The image capturing unit 82 can determine the state of the image and output a removal stop command to the removal unit 750. If either the laser distance meter 83 or the photoelectric distance sensor 84 fails, In addition, the film thickness b of the microorganisms can be estimated and a command to stop removal can be output if necessary.

[0100] In the above description, the imaging unit 82, the laser distance meter 83, and the photoelectric distance sensor 84 are all Although the above description is based on the case where both of these are used, the configuration using any two of these may also be used. It is also possible to use two of the imaging unit 82, the laser distance meter 83, and the photoelectric distance sensor 84. Even if one of them fails, the thickness b of the microorganism film is estimated and a command to stop removal is issued. It is possible.

[0101] In this way, according to the first to third embodiments, the excess material is applied to the surface of the flat plate 20. The microorganisms adhering to the plate 20 can be removed by being reliably peeled off or killed. By bringing oxygen and raw water into contact with the microorganisms inside, the plates are able to remove organic matter, nitrogen, phosphorus, etc. Water treatment equipment 100, 200, 300, 400, 5 that can maintain a high removal rate for pollutants We can provide 00, 600 and water treatment systems 700, 800, 900, 999 This becomes:

[0102] Although several embodiments of the present invention have been described, these embodiments are presented by way of example only. These novel embodiments are not intended to limit the scope of the invention. It is possible to implement the invention in various other forms, and various modifications are possible without departing from the spirit of the invention. These embodiments and their modifications are within the scope of the invention. It is included in the summary and in the scope of the invention described in the claims and their equivalents. . [Explanation of symbols]

[0103] 10... Water treatment tank 20... Flat plate 30... Rotating shaft 40... Motor 41... Electric Flow meter 50, 150, 250, 350, 450, 550, 650, 750...Removal section 51 Blower 52, air diffuser 60, sludge extraction piping 70, sludge extraction valve 80 Housing cover 81 ····Gas phase section 82 ···Image capture section 83 ···Laser distance meter 84 ···Photoelectric type Distance sensors 90, 190, 290, 390 Control units 91, 191, 291, 391 Biofouling amount estimation units 92, 192, 292, 392 Stop necessity determination units 100, 20 0, 300, 400, 500, 600, 700... Water treatment device 151... Sprinkler unit 25 1 Scraping member 351 Steam ejection section 451 Ultraviolet irradiation section 551 Sterilant tank 552 ··· Chemical injection pump 553 ··· Sterilant injection unit 653 ··· Sterilant Spout section 800, 900, 999... Water treatment system

Claims

1. A flat plate that rotates so that a portion of the plate is immersed in raw water and has microorganisms attached thereto that purify the raw water; a removal unit that removes a portion of the microorganisms attached to the flat plate; Equipped with the removal unit has a microorganism killing means for killing a part of the microorganisms attached to the flat plate, The microorganism killing means is a water treatment device that sprays high-temperature steam onto the part of the flat plate that is not immersed in the raw water, thereby killing some of the microorganisms.

2. the removal unit removes a portion of the microorganisms attached to the flat plate by applying a physical action to the flat plate. The water treatment device according to claim 1.

3. the removal unit causes air bubbles to collide with the immersed portion of the flat plate to clean the flat plate. The water treatment device according to claim 2.

4. the removal unit sprays a fluid onto the flat plate to clean the flat plate. The water treatment device according to claim 2.

5. The fluid is treated water obtained by purifying the raw water with the microorganisms. The water treatment device according to claim 4.

6. the removal unit peels off the microorganisms from the flat plate by pressing a scraping member against the surface of the flat plate. The water treatment device according to claim 2.

7. The microorganism killing means further irradiates the plate with ultraviolet light to kill a portion of the microorganisms. The water treatment device according to claim 1.

8. The microorganism killing means further injects a disinfectant into the tank containing the raw water to kill a portion of the microorganisms. The water treatment device according to claim 1.

9. The microorganism killing means further sprays a disinfectant onto the surface of the flat plate to kill a portion of the microorganisms. The water treatment device according to claim 1.

10. A flat plate that rotates so that a portion of the plate is immersed in raw water and has microorganisms attached thereto that purify the raw water; a removal unit that removes a portion of the microorganisms attached to the flat plate; an imaging unit that images the flat plate; a control unit that stops the function of the removal unit to remove a portion of the microorganisms attached to the plate in accordance with the image of the plate captured by the imaging unit; Equipped with the removal unit has a microorganism killing means for killing a part of the microorganisms attached to the flat plate, The microorganism killing means is a water treatment system that sprays high-temperature steam onto the part of the flat plate that is not immersed in the raw water to kill some of the microorganisms.

11. A flat plate that rotates so that a portion of the plate is immersed in raw water and has microorganisms attached thereto that purify the raw water; a removal unit that removes a portion of the microorganisms attached to the flat plate; an ammeter for measuring the current of a motor used to rotate the plate; a control unit that stops the function of the removal unit to reduce the amount of microorganisms excessively attached to the flat plate in accordance with the current measured by the ammeter when the flat plate is rotated at a constant rotation speed; Equipped with the removal unit has a microorganism killing means for killing a part of the microorganisms attached to the flat plate, The microorganism killing means is a water treatment system that sprays high-temperature steam onto the part of the flat plate that is not immersed in the raw water to kill some of the microorganisms.

12. A flat plate that rotates so that a portion of the plate is immersed in raw water and has microorganisms attached thereto that purify the raw water; a removal unit that removes a portion of the microorganisms attached to the flat plate; a distance meter for measuring the distance to the surface of the microbial film attached to the plate; a control unit that stops the function of the removal unit to reduce the amount of microorganisms excessively attached to the flat plate according to the distance measured by the distance meter; Equipped with the removal unit has a microorganism killing means for killing a part of the microorganisms attached to the flat plate, The microorganism killing means is a water treatment system that sprays high-temperature steam onto the part of the flat plate that is not immersed in the raw water to kill some of the microorganisms.

Images