Water treatment device, program, method, and system

Abstract

A water treatment device according to the present embodiment comprises: a sensor that measures the water quality of passing water; valves that selectively deliver the water, the water quality of which has been measured, to a first flow path, a second flow path, and a third flow path; a chemical treatment module that performs a chemical treatment on the water supplied from the first flow path; a physical treatment module that performs a physical treatment on the water supplied from the second flow path; and a control unit that controls opening and closing of the valves on the basis of a sensing result from the sensor, performs a treatment in the chemical treatment module and / or the physical treatment module for a prescribed time, and then delivers the water from the third flow path.

Description

Water treatment apparatus, program, method, and system

[0001] The present disclosure relates to a water treatment apparatus, a program, a method, and a system.

[0002] In Patent Document 1, a technique is described in which predetermined treatment is performed on drainage in a flow path between a solid and liquid separation tank and a water tank to make it reusable.

[0003] Japanese Patent Application Laid-Open No. 2021-184988

[0004] Although Patent Document 1 describes decolorization, it does not mention effective decolorization.

[0005] An object of the present disclosure is to more effectively decolorize water in a water treatment apparatus that generates circulating water.

[0006] The water treatment apparatus of the present embodiment includes a sensor that measures the quality of water passing therethrough, a valve that selectively feeds the water whose quality has been measured to a first flow path, a second flow path, or a third flow path, a chemical treatment module that performs chemical treatment on the water supplied from the first flow path, a physical treatment module that performs physical treatment on the water supplied from the second flow path, and a control unit that controls the opening and closing of the valve based on the sensing result by the sensor and sends out water from the third flow path after performing the treatment in at least one of the chemical treatment module and the physical treatment module for a predetermined time.

[0007] According to the present disclosure, water can be more effectively decolorized in a water treatment apparatus that generates circulating water.

[0008] It is an overall configuration diagram of an example of the water treatment apparatus 1. It is a block diagram showing an example of the configuration of the decolorization treatment unit 40. It is a flowchart showing an example of the operation of the control unit 50 when the decolorization treatment unit 40 performs the decolorization treatment. It is a block diagram showing an example of the configuration of the decolorization treatment unit 40. It is a block diagram showing an example of the configuration of the decolorization treatment unit 40. It is a block diagram showing an example of the configuration of the decolorization treatment unit 40. It is a block diagram showing an example of the configuration of the decolorization treatment unit 40. It is a block diagram showing the basic hardware configuration of the computer 90.

[0009] The embodiments of this disclosure will be described below with reference to the drawings. In all the drawings illustrating the embodiments, common components are denoted by the same reference numerals, and repeated explanations are omitted. The following embodiments are not intended to unduly limit the content of this disclosure as described in the claims. Not all components shown in the embodiments are necessarily essential components of this disclosure. Also, each drawing is a schematic diagram and is not necessarily a strict illustration.

[0010] Furthermore, in the following description, "processor" refers to one or more processors. At least one processor is typically a microprocessor such as a CPU (Central Processing Unit), but may be another type of processor such as a GPU (Graphics Processing Unit). At least one processor may be single-core or multi-core.

[0011] Furthermore, at least one processor may be a broad-sense processor, such as a hardware circuit that performs some or all of the processing (e.g., an FPGA (Field-Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit)).

[0012] Furthermore, in the following explanation, we may use expressions such as "xxx table" to describe information from which an output is obtained for a given input. This information can be data of any structure, or it can be a learning model such as a neural network that generates an output for a given input. Therefore, "xxx table" can be referred to as "xxx information."

[0013] Furthermore, in the following explanation, the configuration of each table is just an example; one table may be divided into two or more tables, or all or part of two or more tables may be a single table.

[0014] Furthermore, in the following explanation, the subject of the process may sometimes be "program," but since a program is executed by a processor and performs defined processes using the memory and / or interface as appropriate, the subject of the process may also be the processor (or a device such as a controller that has that processor).

[0015] The program may be installed on a device such as a computer, or it may reside on a program distribution server or a computer-readable (e.g., non-temporary) recording medium. Furthermore, in the following description, two or more programs may be implemented as a single program, or one program may be implemented as two or more programs.

[0016] Furthermore, in the following explanation, identification numbers are used as identification information for various objects, but other types of identification information (for example, identifiers including letters or symbols) may also be used.

[0017] Furthermore, in the following explanations, when describing similar elements without distinction, a reference code (or a common code among reference codes) may be used, and when describing similar elements with distinction, the element's identification number (or reference code) may be used.

[0018] Furthermore, in the following explanation, only control lines and information lines deemed necessary for the explanation are shown, and not all control lines and information lines in the product are necessarily shown. All components may be interconnected.

[0019] Each information processing device consists of a computer equipped with an arithmetic unit and a memory device. The basic hardware configuration of the computer and the basic functional configuration of the computer realized by said hardware configuration will be described later.

[0020] <1. Overview> The water treatment device according to this embodiment is a device for circulating and regenerating wastewater discharged from consumers (hereinafter simply referred to as wastewater). The regenerated water can be used as domestic water for purposes such as toilet flushing, bathing, showering, laundry, and washing dishes. The regenerated water may also be used as drinking water. In other words, the water treatment device is a small-scale circulating water treatment device.

[0021] The decolorization processing unit according to this embodiment is, for example, a device for decolorizing treated wastewater in a water treatment system. The decolorization processing unit has multiple types of decolorization processing modules and sensors that sense predetermined values ​​related to water quality. Based on the sensing results of the water circulating in the water treatment system, the decolorization processing unit sets the combination of decolorization processing modules and the processing order. The decolorization processing unit decolorizes the circulating water using the decolorization processing modules in the set combination and processing order.

[0022] <2. Overall Configuration> The overall configuration of the water treatment device 1 according to this embodiment will now be described. Figure 1 is an overall configuration diagram of an example of the water treatment device 1. Figure 1 shows an example where the water treatment device 1 is used in a circulating toilet 100.

[0023] The recirculating toilet 100 according to this embodiment can be used, for example, as a toilet in a residence, villa, mountain cabin, temporary housing, or mobile housing built in an area where water supply and sewage facilities are not readily available, such as in mountainous areas. The recirculating toilet 100 can also be used as a temporary toilet at, for example, an outdoor event venue, a construction site, or a disaster evacuation center. By using the recirculating toilet 100, wastewater can be treated and reused as recirculating water, so a toilet can be used even if water supply and sewage facilities are not available.

[0024] The water treatment device 1 according to this embodiment can be used in applications other than a circulating toilet 100. The water treatment device 1 may be used, for example, to regenerate wastewater used in kitchens, washrooms (laundry), bathrooms, etc. In this case, for example, a filtration unit and a UV sterilization unit may be installed in the water treatment device 1 between the final water tank and the actual use of water by the consumer. The filtration unit can be implemented by physical filtration such as reverse osmosis membranes, nanofiltration membranes, ultrafiltration membranes, and microfiltration membranes, as well as by biological filtration, chemical filtration such as zeolite and ion exchange resin. Alternatively, the filtration unit may be implemented by an activated carbon filter that combines physical and chemical filtration. The UV sterilization unit sterilizes the water. Furthermore, in the water treatment device 1, toilet wastewater and wastewater used in kitchens, washrooms (laundry), bathrooms, etc., may be treated in different treatment systems.

[0025] As shown in Figure 1, the water treatment device 1 is connected to the toilet bowl 2 by a plurality of drain pipes. The water treatment device 1 comprises a wastewater adjustment tank 10, a biological treatment tank 20, a treated water storage tank 30, and a decolorization treatment unit 40. The wastewater adjustment tank 10, the biological treatment tank 20, the treated water storage tank 30, and the decolorization treatment unit 40 are connected by a plurality of drain pipes so that water can be delivered between the components. Each of the plurality of drain pipes is provided with a pump, and the drive of each pump is controlled so that the water level in the tank to which the pump is delivered is within a predetermined range, and as far as possible, it operates continuously at a constant rate. Note that Figure 1 is merely an example, and the water treatment device 1 may have other configurations. For example, the wastewater adjustment tank 10, the biological treatment tank 20, and the treated water storage tank 30 may be included in a single module that performs a series of processes. Also, at least some of the pumps in the water treatment device 1 are not essential, and the liquid may be delivered using other physical phenomena such as gravity, overflow, or the siphon principle. Also, the biological treatment tank 20 may not be included.

[0026] The water treatment apparatus 1 includes a control unit 50. The control unit 50 controls, for example, the components included in the water treatment apparatus 1. The water treatment apparatus 1 also includes, for example, a wastewater adjustment tank 10, a biological treatment tank 20, a treated water storage tank 30, a decolorization treatment unit 40, or a sensor unit for detecting various physical properties in the pipes connected thereto.

[0027] <3. Drainage Adjustment Tank 10> The drainage adjustment tank 10 is located downstream of the toilet 2 and temporarily stores the wastewater discharged from the toilet 2. The toilet 2 may be equipped with, for example, a crushing pump. The crushing pump crushes the sewage and other waste contained in the wastewater and sends the crushed sewage together with the wastewater to the drainage adjustment tank 10.

[0028] A blower 11 is provided in the wastewater adjustment tank 10. The blower 11 continuously or intermittently sends air into the wastewater adjustment tank 10. The air sent from the blower 11 agitates the wastewater stored inside the wastewater adjustment tank 10. A pump 66 is installed between the wastewater adjustment tank 10 and the biological treatment tank 20. The pump 66 sends the wastewater stored in the wastewater adjustment tank 10 to the biological treatment tank 20.

[0029] A measuring instrument 12 is installed inside or near the wastewater treatment tank 10 to measure the water quality of the wastewater flowing into the wastewater treatment tank 10. Specifically, for example, the measuring instrument 12 is installed in the flow path before the wastewater treatment tank 10, the inlet of the wastewater treatment tank 10, the void inside the wastewater treatment tank 10, or in the wastewater inside the wastewater treatment tank 10. The measuring instrument 12 measures, for example, the electrical conductivity of the wastewater. The measuring instrument 12 transmits the EC value as a measurement result to the control unit 50.

[0030] <4. Biological Treatment Tank 20> An example of the configuration of the biological treatment tank 20 will be described. The biological treatment tank 20 uses microorganisms to decompose organic compounds contained in the wastewater discharged from the wastewater adjustment tank 10. In addition, biological denitrification is performed in the biological treatment tank 20, in which nitrogen compounds are removed by the action of microorganisms. In biological denitrification, aerobic bacteria and facultative anaerobic bacteria are combined to decompose nitrogen compounds and carbon compounds in the wastewater. Biological denitrification includes a nitrification process performed in an aerobic environment and a denitrification process performed in an anaerobic environment.

[0031] In the nitrification process, nitrifying bacteria oxidize nitrogen components in wastewater to nitrite or nitrate. Nitrifying bacteria are a type of aerobic bacteria that require sufficient dissolved oxygen in the tank to function.

[0032] In the denitrification process, the water nitrified in the nitrification process is placed under anaerobic conditions without dissolved oxygen, and nitrite and nitrate are reduced to nitrogen gas using anaerobic respiration by denitrifying bacteria.

[0033] The biological treatment tank 20 is formed, for example, as a single tank, and both the nitrification process and the denitrification process are carried out in this single tank. The biological treatment tank 20 is equipped with a stirrer 23, a membrane filtration unit 25, a blower 26, and a blower 27. The stirrer 23 is implemented, for example, by a mixer having stirring blades. The stirrer 23 stirs the mixture by rotating the stirring blades at timings based on the control of the control unit 50, for example, and promotes contact between microorganisms and organic matter contained in the mixture. As a result, the stirrer 23 is driven in the denitrification process.

[0034] The membrane filtration unit 25 is implemented using, for example, at least one of the following: MF (microfiltration membrane), UF (ultrafiltration membrane), NF (nanofiltration membrane), ceramic filter, or metal membrane. The membrane filtration unit 25 filters the biologically treated water to produce treated water. A pump 67 is installed between the biological treatment tank 20 and the decolorization treatment unit 40. The pump 67 sends the treated water filtered by the membrane filtration unit 25 to the decolorization treatment unit 40.

[0035] The blower 26 supplies air (or oxygen) into the biological treatment tank 20 at a timing determined, for example, based on the control of the control unit 50. The air supplied from the blower 26 maintains aerobic circulation in the nitrification process.

[0036] The blower 27 is installed, for example, below the membrane filtration unit 25. The blower 27 supplies air (or oxygen) to the membrane filtration unit 25 at a timing based on the control of the control unit 50, for example. The membrane filtration unit 25 is cleaned by the air supplied from the blower 27.

[0037] A supply unit 80 is installed in the biological treatment tank 20. The supply unit 80 supplies a hydrogen donor to the biological treatment tank 20 at a timing based on the control of the control unit 50, for example. The hydrogen donor is a substance that reduces other substances in the biological treatment tank 20 by donating hydrogen, and is itself dehydrogenated and oxidized. The hydrogen donor may be, for example, an alcohol such as methanol or ethanol, or a sugar such as glucose.

[0038] Although Figure 1 shows a case where the biological treatment tank 20 is formed as a single tank, the configuration of the biological treatment tank 20 is not limited to this. The biological treatment tank 20 may not be a single tank, but may include an anaerobic tank and an aerobic tank. The anaerobic tank is located upstream of the aerobic tank 22. Facultative anaerobic bacteria are present in the mixed liquid in the anaerobic tank. The denitrification process is mainly carried out in the anaerobic tank. Aerobic bacteria are present in the mixed liquid in the aerobic tank. The nitrification process is mainly carried out in the aerobic tank.

[0039] <5. Decolorization Processing Unit 40> An example of the configuration of the decolorization processing unit 40 will be described. Figure 2 is a block diagram showing an example of the configuration of the decolorization processing unit 40. The decolorization processing unit 40 performs decolorization on the water supplied from the biological treatment tank 20. The decolorization processing unit 40 shown in Figure 2 includes an intermediate tank 41, a sensor 42, solenoid valves 431 to 433, a filtration module 44, and an ozone treatment module 45. Pumps are installed between each component as needed. The position and number of pumps installed can be adjusted as needed. For this reason, they are not shown in Figure 2.

[0040] The intermediate tank 41 is a tank that holds water supplied from the biological treatment tank 20. The intermediate tank 41 also holds water that has passed through the filtration module 44. Furthermore, the intermediate tank 41 holds water that has passed through the ozone treatment module 45. The water held in the intermediate tank 41 is sent from the intermediate tank 41 to the valve group 43 via the sensor 42 when the control unit 50 drives a pump at a predetermined timing. The predetermined timings are, for example, the following: • A predetermined time has arrived. • A predetermined period of time has elapsed since the pump was first driven. • The water level measured by the water level gauge installed inside the intermediate tank 41 has reached a predetermined value.

[0041] In the intermediate tank 41, for example, water is drawn in from the depths, and the drawn-in water is sent from the intermediate tank 41 to the valve group 43 via the sensor 42.

[0042] Sensor 42 is a sensor for measuring water quality. Sensor 42 can be implemented as, for example, an optical sensor or an electrical conductivity meter. More specifically, optical sensors include turbidimeters, colorimeters, transparency meters (which may also be called opacity meters), etc. Sensor 42 transmits the measured sensing value to the control unit 50. The sensing value may be an actual measured value, a measured value based on an actual measured value, or an index based on an actual measured value. For example, an evaluation index combining turbidity and color may be called opacity.

[0043] The valve group 43 comprises solenoid valves 431 to 433. The opening and closing of solenoid valves 431 to 433 are controlled by instructions from the control unit 50. Solenoid valve 431 is connected to the ozone treatment module 45. When solenoid valve 431 is in the "open" state by instructions from the control unit 50, the water supplied to the valve group 43 is supplied to the ozone treatment module 45 via solenoid valve 431. Solenoid valve 432 is connected to the filtration module 44. When solenoid valve 432 is in the "open" state by instructions from the control unit 50, the water supplied to the valve group 43 is supplied to the filtration module 44 via solenoid valve 432. Solenoid valve 433 is connected to a flow path leading to the treated water storage tank 30. When solenoid valve 433 is in the "open" state by instructions from the control unit 50, the water supplied to the valve group 43 is supplied to the flow path leading to the treated water storage tank 30 via solenoid valve 433. A pump 68 is installed between the decolorization unit 40 and the treated water storage tank 30. The pump 68 sends the treated water, which has been decolorized in the decolorization unit 40, to the treated water storage tank 30. The valve group 43 may consist of multiple three-way switching valves. Alternatively, it may consist of a single switching valve that can be switched in multiple directions.

[0044] The filtration module 44 removes, for example, water quality pollution components from the supplied water. The filtration module 44 is an example of a decolorization treatment module by physical treatment. Physical treatment is, for example, a treatment that applies a physical action to water. The filtration module 44 may be referred to as a physical treatment module. The filtration module 44 is realized, for example, by a filter medium (filter), etc. Specifically, for example, the filtration module 44 includes an activated carbon filter. The treatment by the activated carbon filter is both a physical treatment and a chemical treatment. In the present embodiment, the treatment by the activated carbon filter is described as a physical treatment. The filtration module 44 may be, for example, a combination of an activated carbon filter and a wound filter, or a combination of an activated carbon filter and other filters (for example, a sediment filter, MF (microfiltration membrane), UF (ultrafiltration membrane), NF (nanofiltration membrane), ceramic filter, ion exchange filter, metal membrane, etc.). In the case of a combination of an activated carbon filter and other filters, for example, other filters are arranged upstream of the activated carbon filter. The water that has passed through the filtration module 44 is sent to the intermediate tank 41.

[0045] The ozone treatment module 45 decolorizes, sterilizes, and deodorizes the supplied water using ozone gas. The ozone treatment module 45 is an example of a decolorization treatment module using chemical treatment. More specifically, the ozone treatment module 45 is a module that utilizes the accelerated oxidation method among chemical treatments. Chemical treatment is, for example, a treatment that applies chemical effects to water. As for chemical treatment, the coagulation and sedimentation method using chemicals, the accelerated oxidation method, and the ion exchange method can be considered, but in this embodiment, the accelerated oxidation method is preferred. The ozone treatment module 45 is realized, for example, by an ozone tank. The ozone tank is a tank filled with ozone gas generated by a predetermined method. Methods for generating ozone gas include, for example, the discharge method (silent discharge method), the electrolysis method (water electrolysis cell method), and the ultraviolet method (mercury UV lamp method / mercury-free UV lamp (excimer lamp) method). The water supplied to the ozone treatment module 45 is injected, for example, from the bottom of the ozone tank and exposed to ozone gas, which has strong oxidizing power, inside the ozone tank. The water injected into the ozone tank is discharged from an outlet located at a predetermined height in the ozone tank. The water discharged from the ozone tank is sent to the intermediate tank 41.

[0046] <6. Control Unit 50> The control unit 50 controls the operation of the entire water treatment device 1. Specifically, for example, the control unit 50 controls the decolorization process of water in the decolorization processing unit 40.

[0047] The control unit 50 appropriately sets the processing time in the decolorization processing module and the target sensing value according to the degree of the sensing value (chromaticity) acquired by the sensor 42, so as to optimize the total processing time for the entire decolorization process. Note that chromaticity may be replaced with other indicators. Optimizing the total processing time means, for example, minimizing the total processing time. The total processing time is set so as not to exceed the processing cycle set in the biological processing tank 20. The processing time in a specific decolorization processing module includes, for example, the minimum processing time required to maintain the decolorization process, the maximum processing time representing the limit of the decolorization process that can be maintained, or a combination of these. The target sensing value may be, for example, an absolute value or a relative value. If it is a relative value, for example, the rate of change of the sensing value may be set.

[0048] For example, if the chromaticity is lower than a predetermined value, the control unit 50 sets the processing time and the target sensing value for the filtration module 44 only. In other words, the control unit 50 performs the decolorization process using only the filtration module 44. If the chromaticity is higher than a predetermined value, the control unit 50 sets the processing time and the target sensing value for the ozone treatment module 45, and then sets the processing time and the target sensing value for the filtration module 44. In other words, 50 performs the decolorization process using the ozone treatment module 45 until the chromaticity reaches a predetermined range, and then performs the decolorization process using the filtration module 44 until the chromaticity reaches a predetermined low level. The control unit 50 may proceed to processing with the next decolorization module even if the target sensing value has not been reached, after a predetermined processing time has elapsed. The control unit 50 may also proceed to processing with the next decolorization module even if a predetermined processing time has not elapsed, if the effect of the decolorization processing module currently in use is weak (for example, if the rate of change in chromaticity reduction becomes small). Furthermore, the control unit 50 may monitor the rate of change of the sensing value for each process repeated in a single decolorization module and adjust the next decolorization process based on the trend of the rate of change. In other words, for example, if the rate of change of chromaticity is small even after repeating the process in the ozone treatment module 45, the control unit 50 may proceed to the process in the filtration module 44.

[0049] For example, the control unit 50 refers to a preset processing table to set the processing time in a specific decolorization processing module and the sensing value to be reached. Note that the setting of the processing time in a specific decolorization processing module and the sensing value to be reached is not limited to referring to the processing table, and other methods can also be adopted. For example, a learned model obtained by using the sensing value as an input and learning the processing time in a specific decolorization processing module and the sensing value to be reached as correct output data may be used.

[0050] For example, the control unit 50 controls the pump and solenoid valves 431 to 433 to supply water to the set decolorization processing module.

[0051] Specifically, for example, when the control unit 50 supplies water to the filtration module 44, it issues an instruction to open the solenoid valve 432 and an instruction to close the solenoid valves 431 and 433. Further, the control unit 50 controls the pump so as to supply water to the filtration module 44 at a predetermined flow rate. Note that the control unit 50 may control the flow rate by adjusting the opening degree or the opening / closing speed of the solenoid valve 432. For example, the control unit 50 controls the pump and the solenoid valves 431 to 433 to maintain the supply of water to the filtration module 44 until the sensing value reaches a predetermined value. Further, for example, even if the sensing value does not reach a predetermined value, the control unit 50 controls the pump and the solenoid valves 431 to 433 to maintain the supply of water to the filtration module 44 until the maximum processing time elapses. Further, for example, the control unit 50 controls the pump and the solenoid valves 431 to 433 to maintain the supply of water to the filtration module 44 for at least the minimum processing time. The control unit 50 may combine at least two of these control requirements, for example.

[0052] Furthermore, for example, when supplying water to the ozone treatment module 45, the control unit 50 issues an instruction to open the solenoid valve 431 and an instruction to close the solenoid valves 432 and 433. The control unit 50 also controls the pump to supply water to the ozone treatment module 45 at a predetermined flow rate. The control unit 50 may also control the flow rate by adjusting the opening degree or opening / closing speed of the solenoid valve 431. For example, the control unit 50 controls the pump and solenoid valves 431 to 433 to maintain the supply of water to the ozone treatment module 45 until the sensing value reaches a predetermined value. Furthermore, for example, the control unit 50 controls the pump and solenoid valves 431 to 433 to maintain the supply of water to the ozone treatment module 45 until the maximum treatment time has elapsed, even if the sensing value has not reached a predetermined value. Furthermore, for example, the control unit 50 controls the pump and solenoid valves 431 to 433 to maintain the supply of water to the ozone treatment module 45 for at least the minimum treatment time. The control unit 50 may combine at least two of these control requirements.

[0053] Furthermore, for example, when supplying water to the flow path leading to the treated water storage tank 30, the control unit 50 issues an instruction to open the solenoid valve 433 and an instruction to close the solenoid valves 431 and 432. The control unit 50 also controls the pump to send water to the treated water storage tank 30 at a predetermined flow rate. The control unit 50 may also control the flow rate by adjusting the opening degree or opening / closing speed of the solenoid valve 433. Once the decolorization treatment using the filtration module 44 and the ozone treatment module 45 is completed, the control unit 50 controls the pump and solenoid valves 431 to 433 to discharge water to the treated water storage tank 30.

[0054] <7. Treated Water Storage Tank 30> The treated water storage tank 30 is a tank for storing treated water obtained by biological treatment of wastewater. In other words, the treated water storage tank 30 stores the treated water to be supplied to the toilet 2. To put it another way, the treated water storage tank 30 stores the treated water that has been decolorized in the decolorization treatment unit 40. A pipe 41 that leads to the toilet 2 is connected to the treated water storage tank 30.

[0055] A pump 63 installed in the piping 41 supplies treated water for flushing the toilet bowl 2 to the toilet bowl 2 through the piping 41. The pump 63 is driven, for example, when the toilet bowl 2 is used. The pump 63 may be driven in response to instructions from the user or in response to detection of the use of the toilet bowl 2. In addition, if it is anticipated that the circulating toilet 100 will be unused for a long period of time, the pump 63 may be driven at predetermined intervals.

[0056] <8. Operation of the decolorization unit 40> The decolorization process in the decolorization unit 40 will be described in detail below.

[0057] Figure 3 is a flowchart illustrating an example of the operation of the control unit 50 when the decolorization processing unit 40 performs decolorization. Figure 3 describes the operation of the control unit 50 when decolorization is performed by the ozone processing module 45 followed by decolorization by the filtration module 44. However, the processing of the decolorization processing unit 40 is not limited to this, and for example, only decolorization by the filtration module 44 may be performed, or decolorization by the filtration module 44 and decolorization by the ozone processing module 45 may be followed by repeated decolorization by the filtration module 44.

[0058] Furthermore, Figure 3 illustrates the operation of the control unit 50 when decolorization is performed by the ozone treatment module 45 followed by decolorization by the filtration module 44. However, before the decolorization by the ozone treatment module 45, a process may be performed to push any remaining water in the ozone tank of the ozone treatment module 45 from the previous batch into the intermediate tank 41.

[0059] In step S11, the control unit 50 causes the decolorization processing unit 40 to perform decolorization processing using the ozone processing module 45. Specifically, the control unit 50 opens a valve and supplies the water treated in the biological processing tank 20 to the intermediate tank 41. When the water in the intermediate tank 41 exceeds a predetermined value, the control unit 50 closes the valve, opens the solenoid valve 431, closes the solenoid valves 432 and 433, and circulates the water flowing into the intermediate tank 41 between the ozone processing module 45 and the intermediate tank 41. The control unit 50 controls, for example, the opening and closing speed of the solenoid valve 431 so that the flow rate of the circulating water reaches a predetermined value.

[0060] In step S12, the control unit 50 determines whether the requirements for terminating the decolorization treatment by the ozone treatment module 45 have been met. Specifically, the control unit 50 determines, for example, whether the circulation between the intermediate tank 41 and the ozone treatment module 45 has been maintained for a period of time equal to or greater than the first time threshold. In other words, the control unit 50 determines whether the minimum treatment time has elapsed since the decolorization treatment by the ozone treatment module 45 was started. If the time for which the circulation continues has not reached the first time threshold, the control unit 50 continues the treatment.

[0061] If the time during which the cycle continues exceeds the first time threshold, the control unit 50 determines whether the value of the sensor 42 has fallen below the first sensing threshold. More specifically, if the sensing value output from the sensor 42 is chromaticity, the control unit 50 determines, for example, whether the chromaticity has fallen to the first sensing threshold. If the value of the sensor 42 is below the first sensing threshold, the control unit 50 moves the process to step S13.

[0062] If the value from sensor 42 exceeds the first sensing threshold, the control unit 50 determines, for example, whether the maintenance of circulation between the intermediate tank 41 and the ozone treatment module 45 has reached a second time threshold. In other words, the control unit 50 determines whether the maximum treatment time has elapsed since the decolorization treatment by the ozone treatment module 45 started. If the time for which circulation continues reaches the second time threshold, the control unit 50 moves the process to step S13 even if the value from sensor 42 exceeds the first sensing threshold. If the time for which circulation continues has not reached the second time threshold, and the value from sensor 42 exceeds the first sensing threshold, the control unit 50 continues the decolorization treatment by the ozone treatment module 45.

[0063] In step S13, the control unit 50 causes the decolorization processing unit 40 to perform decolorization processing using the filtration module 44. Specifically, the control unit 50 opens the solenoid valve 432, closes the solenoid valves 431 and 433, and circulates the water stored in the intermediate tank 41 between the filtration module 44 and the intermediate tank 41. The control unit 50 controls, for example, the opening and closing speed of the solenoid valve 432 so that the flow rate of the circulating water reaches a predetermined value.

[0064] In step S14, the control unit 50 determines whether the requirements for terminating the decolorization process by the filtration module 44 have been met. Specifically, the control unit 50 determines, for example, whether circulation between the intermediate tank 41 and the filtration module 44 has been maintained for a period of time equal to or greater than the third time threshold. In other words, the control unit 50 determines whether the minimum processing time has elapsed since the decolorization process by the filtration module 44 was started. The third time threshold is, for example, shorter than the first time threshold. If the time for which circulation continues has not reached the third time threshold, the control unit 50 continues the process.

[0065] If the time during which the cycle continues exceeds the third time threshold, the control unit 50 determines whether the value of the sensor 42 has fallen below the second sensing threshold. More specifically, if the sensing value output from the sensor 42 is chromaticity, the control unit 50 determines, for example, whether the chromaticity has fallen to the second sensing threshold. If the value of the sensor 42 is below the second sensing threshold, the control unit 50 moves the process to step S15. The second sensing threshold is, for example, lower than the first sensing threshold.

[0066] If the value of sensor 42 exceeds the second sensing threshold, the control unit 50 determines, for example, whether the maintenance of circulation between the intermediate tank 41 and the filtration module 44 has reached the fourth time threshold. In other words, the control unit 50 determines whether the maximum processing time has elapsed since the decolorization process by the filtration module 44 started. The fourth time threshold is, for example, shorter than the second time threshold. If the time for which circulation continues reaches the fourth time threshold, the control unit 50 moves the process to step S15, even if the value of sensor 42 exceeds the second sensing threshold. If the time for which circulation continues has not reached the fourth time threshold, and the value of sensor 42 exceeds the second sensing threshold, the control unit 50 continues the decolorization process by the filtration module 44.

[0067] In step S15, the control unit 50 sends the water after the decolorization treatment is complete to the treated water storage tank 30. Specifically, the control unit 50 opens the solenoid valve 433, closes the solenoid valves 431 and 432, and sends the water stored in the intermediate tank 41 to the treated water storage tank 30.

[0068] As described above, the decolorization processing unit 40 according to the above embodiment includes a sensor 42 for measuring the water quality of the treated water, a valve 43 for selectively supplying the treated water whose water quality has been measured to a first channel, a second channel, or a third channel, a chemical processing module (ozone processing module 45) for performing chemical processing on the water supplied from the first channel, a physical processing module (filtration module 44) for performing physical processing on the water supplied from the second channel, and a control unit 50 that controls the opening and closing of the valve 43 based on the sensing results from the sensor 42, and after performing processing in at least one of the chemical processing module and the physical processing module for a predetermined time, supplies water from the third channel.

[0069] If the order of the decolorization treatment modules is fixed, for example, with the ozone treatment module installed after the filtration module, the load on the activated carbon filter in the filtration module becomes high, potentially shortening the replacement life of the activated carbon filter. Furthermore, since most of the chromatic components are removed by the activated carbon filter, the decolorization effect of ozone cannot be determined. In addition, because the water passes through the filtration module before the ozone treatment module, the flow rate of the circulation line decreases if the activated carbon filter becomes blocked. In this embodiment, the decolorization treatment unit 40 can decolorize the water while distributing the load on each decolorization treatment module by switching the combination and order of the decolorization treatment modules (chemical treatment module and physical treatment module) according to the water quality (chromaticity) and varying the treatment time using the decolorization treatment modules. Furthermore, it is possible to extend the life of each decolorization treatment module.

[0070] Therefore, according to the decolorization processing unit 40 of this embodiment, water can be decolorized more effectively in a water treatment apparatus that generates circulating water. Furthermore, it can contribute to the rationalization of the entire water treatment process.

[0071] Furthermore, in the above embodiment, the control unit 50 performs circulation in at least one of the chemical processing module and the physical processing module based on the sensing results from the sensor 42. This enables the decolorization processing unit 40 to perform the decolorization process more effectively.

[0072] <9. Modifications> In the above embodiment, the decolorization treatment unit 40 was described as having the components shown in Figure 2. However, the components of the decolorization treatment unit 40 are not limited to those shown in Figure 2. Modifications of the decolorization treatment unit 40 are shown below. Note that the configurations of the decolorization treatment unit 40 shown below may be combined in any way.

[0073] <9.1. Modification 1 of the decolorization processing unit 40> Figure 4 is a block diagram showing an example of the configuration of the decolorization processing unit 40. The decolorization processing unit 40 performs decolorization on water supplied from the biological treatment tank 20. Specifically, the decolorization processing unit 40 performs decolorization on water supplied from the biological treatment tank 20 by means of a filtration module 44, decolorization on water supplied from the biological treatment tank 20 by means of an ozone treatment module 45, and decolorization on water supplied by means of a supply unit 46. The decolorization processing unit 40 shown in Figure 4 includes an intermediate tank 41, a sensor 42, a supply unit 46, solenoid valves 431 to 433, a filtration module 44, and an ozone treatment module 45. The supply unit 46 may also be called a chlorine treatment module and is an example of a decolorization processing module using chemical treatment. The supply unit 46 is also an example of a decolorization processing module using accelerated oxidation among chemical treatments.

[0074] The supply unit 46 supplies (adds) chlorine to the intermediate tank 41, for example. Specifically, the supply unit 46 includes a chlorine tank and a chlorine pump. The chlorine tank is a tank for storing hypochlorous acid water. Hypochlorous acid water is produced, for example, by dissolving hypochlorous acid tablets in water supplied to the chlorine tank. Alternatively, hypochlorous acid water may be produced by dissolving salt in water supplied to the chlorine tank and electrolyzing the resulting saline solution. An electrolysis unit for producing hypochlorous acid water by electrolyzing saline solution may be provided separately downstream of the chlorine tank. The supply unit 46 may also add hydrogen peroxide water.

[0075] The chlorine pump is located downstream of the chlorine tank. The chlorine pump is operated under the control of the control unit 50 and adds hypochlorous acid water stored in the chlorine tank to the water stored in the intermediate tank 41. This allows the supply unit 46 to supply hypochlorous acid water to the intermediate tank 41 in an amount and timing determined by the control unit 50, for example, to decolorize the water containing iron, for example. The supply unit 46 can also perform decolorization of the water with chlorine as a final step in water treatment, for example.

[0076] The control unit 50 controls the supply unit 46 at predetermined timings to supply hypochlorous acid water to the intermediate tank 41. The predetermined timings are, for example, as follows: - When predetermined measurements (color, water level, etc.) are taken during the decolorization process by the filtration module 44 - When a predetermined time is reached during the decolorization process by the filtration module 44 - When predetermined measurements are taken during the decolorization process by the ozone treatment module 45 - When a predetermined time is reached during the decolorization process by the ozone treatment module 45 - When a predetermined decolorization process is completed - When the residual chlorine concentration in the treated water storage tank 30 reaches a predetermined value

[0077] The control unit 50 controls the supply unit 46 to supply a predetermined amount of hypochlorous acid water to the intermediate tank 41. The predetermined amount is, for example, one of the following: • A preset amount • An amount calculated based on the residual chlorine concentration in the treated water storage tank 30 • An amount calculated based on the sensing value

[0078] The specific operation of the control unit 50 will be explained using Figure 3. In step S11 shown in Figure 3, the control unit 50 opens a valve and supplies water treated in the biological treatment tank 20 to the intermediate tank 41. When the water level in the intermediate tank 41 exceeds a predetermined value, the control unit 50 opens the solenoid valve 431, closes the solenoid valves 432 and 433, and circulates the water flowing into the intermediate tank 41 between the ozone treatment module 45 and the intermediate tank 41. When the water level in the intermediate tank 41 exceeds the predetermined value, the control unit 50 drives the chlorine pump and adds a preset first amount of hypochlorous acid water to the intermediate tank 41.

[0079] In step S14, the control unit 50 determines whether the requirements for completing the decolorization treatment by the filtration module 44 have been met. If the requirements for completing the decolorization treatment by the filtration module 44 have been met, before performing the treatment in step S15, the control unit 50 drives the chlorine pump and adds a preset second amount of hypochlorous acid water to the intermediate tank 41. The second amount is, for example, less than the first amount.

[0080] <9.2. Modification 2 of the decolorization processing unit 40> Figure 5 is a block diagram showing an example of the configuration of the decolorization processing unit 40. The decolorization processing unit 40 performs decolorization on water supplied from the biological treatment tank 20. Specifically, the decolorization processing unit 40 performs decolorization on water supplied from the biological treatment tank 20 by means of a filtration module 44, decolorization by means of an ozone treatment module 45, and decolorization by means of a UV sterilization unit 47. The decolorization processing unit 40 shown in Figure 4 includes an intermediate tank 41, a sensor 42, a UV sterilization unit 47, solenoid valves 431 to 433, a filtration module 44, and an ozone treatment module 45. The UV sterilization unit 47 may also be called a UV treatment module and is an example of a decolorization processing module using chemical treatment. The ozone treatment module 45 is an example of a decolorization processing module using accelerated oxidation among chemical treatments.

[0081] The UV sterilization unit 47 is located between the intermediate tank 41 and the sensor 42. The UV sterilization unit 47 sterilizes the water discharged from the intermediate tank 41 by irradiating it with ultraviolet light. The water that has passed through the UV sterilization unit 47 then passes through the sensor 42. The UV sterilization unit 47 is operated under the control of the control unit 50, and by irradiating the water discharged from the intermediate tank 41 with ultraviolet light, it becomes possible to perform decolorization of the water with ultraviolet light as a final step in water quality treatment, for example.

[0082] The control unit 50 controls the UV sterilization unit 47 at predetermined timings to irradiate the UV sterilization unit 47 with ultraviolet light. The predetermined timings are, for example, as follows: - When a predetermined measurement is taken during the decolorization process by the filtration module 44 - When a predetermined time is reached during the decolorization process by the filtration module 44 - When a predetermined measurement is taken during the decolorization process by the ozone treatment module 45 - When a predetermined time is reached during the decolorization process by the ozone treatment module 45 - When a predetermined decolorization process is completed

[0083] The control unit 50 controls the UV sterilization unit 47 and irradiates it with ultraviolet light for a predetermined time. The predetermined time is, for example, as follows: • A preset time • An amount calculated based on sensing values

[0084] The specific operation of the control unit 50 will be explained using Figure 3. In step S11 shown in Figure 3, the control unit 50 opens a valve and supplies water treated in the biological treatment tank 20 to the intermediate tank 41. When the water level in the intermediate tank 41 exceeds a predetermined value, the control unit 50 opens the solenoid valve 431, closes the solenoid valves 432 and 433, and circulates the water flowing into the intermediate tank 41 between the ozone treatment module 45 and the intermediate tank 41. The control unit 50 controls, for example, the opening and closing speed of the solenoid valve 431 so that the flow rate of the circulating water reaches a predetermined value. When the water level in the intermediate tank 41 exceeds the predetermined value, the control unit 50 drives a UV lamp and irradiates the water being discharged from the intermediate tank 41 with ultraviolet light. After a preset time has elapsed since the UV lamp was driven, the control unit 50 stops the UV lamp.

[0085] In step S15, the control unit 50 sends the decolorized water to the treated water storage tank 30. Specifically, the control unit 50 opens the solenoid valve 433, closes the solenoid valves 431 and 432, and sends the water stored in the intermediate tank 41 to the treated water storage tank 30. When the valve group 43 is controlled, the control unit 50 drives the UV lamp and irradiates the water sent from the intermediate tank 41 with ultraviolet light. After a predetermined time has elapsed since the UV lamp was driven, the control unit 50 stops the UV lamp.

[0086] <9.3. Modification 3 of the decolorization processing unit 40> Figure 6 is a block diagram showing an example of the configuration of the decolorization processing unit 40. The decolorization processing unit 40 performs decolorization on the water supplied from the biological treatment tank 20. Specifically, the decolorization processing unit 40 does not have an intermediate tank 41, for example, and does not store the water supplied from the biological treatment tank 20, but performs decolorization continuously. The decolorization processing unit 40 shown in Figure 6 includes a backflow valve 49, a solenoid valve 48, a sensor 42, solenoid valves 431 to 433, a filtration module 44, and an ozone treatment module 45.

[0087] The check valve 49 is installed in the flow path leading to the biological treatment tank 20. Water supplied from the biological treatment tank 20 is supplied to the sensor 42 via the check valve 49. The check valve 49 prevents water from flowing back from the decolorization treatment unit 40 to the biological treatment tank 20.

[0088] The solenoid valve 48 is controlled to open or close by instructions from the control unit 50. The solenoid valve 48 is connected to a flow path leading to the sensor 42, a flow path leading to the filtration module 44, and a flow path leading to the ozone treatment module 45. For example, by instructions from the control unit 50, the solenoid valve 48 can open or close the flow path leading to the sensor 42, the flow path leading to the filtration module 44, and the flow path leading to the ozone treatment module 45.

[0089] The control unit 50 controls, for example, the pump, solenoid valves 431-433, and solenoid valve 48 to supply water to the configured decolorization processing module.

[0090] Specifically, for example, when supplying water to the filtration module 44, the control unit 50 instructs the solenoid valve 48 to open the flow path connected to the sensor 42 and the flow path connected to the filtration module 44, and to close the flow path connected to the ozone treatment module 45. The control unit 50 also instructs the solenoid valve 432 to open and the solenoid valves 431 and 433 to close. The control unit 50 also controls the pump to supply water to the filtration module 44 at a predetermined flow rate. The control unit 50 may also control the flow rate by adjusting the opening degree or opening / closing speed of the solenoid valves 48 and 432. For example, the control unit 50 controls the pump, solenoid valves 431-433, and solenoid valve 48 to maintain the water supply to the filtration module 44 until the sensing value reaches a predetermined value. Alternatively, the control unit 50 controls the pump, solenoid valves 431-433, and solenoid valve 48 to maintain the water supply to the filtration module 44 until the maximum processing time has elapsed, even if the sensing value has not reached a predetermined value. Furthermore, the control unit 50 controls the pump, solenoid valves 431-433, and solenoid valve 48 to maintain a water supply to the filtration module 44 for at least a minimum processing time. The control unit 50 may combine, for example, at least two of these control requirements.

[0091] Furthermore, for example, when supplying water to the ozone treatment module 45, the control unit 50 instructs the solenoid valve 48 to open the flow path connected to the sensor 42 and the flow path connected to the ozone treatment module 45, and to close the flow path connected to the filtration module 44. The control unit 50 also instructs the solenoid valve 431 to open and the solenoid valves 432 and 433 to close. The control unit 50 also controls the pump to supply water to the ozone treatment module 45 at a predetermined flow rate. The control unit 50 may also control the flow rate by adjusting the opening degree or opening / closing speed of the solenoid valves 48 and 431. For example, the control unit 50 controls the pump, solenoid valves 431-433, and solenoid valve 48 to maintain the supply of water to the ozone treatment module 45 until the sensing value reaches a predetermined value. Furthermore, the control unit 50 controls the pump, solenoid valves 431-433, and solenoid valve 48 to maintain the supply of water to the ozone treatment module 45 until the maximum processing time has elapsed, even if the sensing value does not reach a predetermined value. Also, the control unit 50 controls the pump, solenoid valves 431-433, and solenoid valve 48 to maintain the supply of water to the ozone treatment module 45 for at least the minimum processing time. The control unit 50 may combine, for example, at least two of these control requirements.

[0092] Furthermore, for example, when supplying water to the flow path leading to the treated water storage tank 30, the control unit 50 instructs the solenoid valve 48 to open the flow path leading to the sensor 42 and the flow path leading to one module that was performing processing immediately before, and to close the flow path leading to the other module. The control unit 50 also instructs the solenoid valve 433 to open and the solenoid valves 431 and 432 to close. The control unit 50 also controls the pump to send water to the treated water storage tank 30 at a predetermined flow rate. The control unit 50 may also control the flow rate by adjusting the opening degree or opening / closing speed of the solenoid valves 48 and 433. When the decolorization process using the filtration module 44 and the ozone treatment module 45 is completed, the control unit 50 controls the pump, solenoid valves 431-433, and solenoid valve 48 to discharge water to the treated water storage tank 30.

[0093] The specific operation of the control unit 50 will be explained using Figure 3. In step S11 shown in Figure 3, the control unit 50 causes the decolorization processing unit 40 to perform decolorization processing using the ozone processing module 45. Specifically, the control unit 50 instructs the solenoid valve 48 to open the flow path connected to the sensor 42 and the flow path connected to the ozone processing module 45, and to close the flow path connected to the filtration module 44. The control unit 50 also instructs the solenoid valve 431 to open and the solenoid valves 432 and 433 to close. As a result, the control unit 50 circulates the water treated in the biological treatment tank 20 so that it is continuously treated in the ozone processing module 45. The control unit 50 controls, for example, the opening and closing speed of the solenoid valves 48 and 431 so that the flow rate of the circulating water is a predetermined value.

[0094] In step S13, the control unit 50 causes the decolorization processing unit 40 to perform decolorization processing using the filtration module 44. Specifically, the control unit 50 instructs the solenoid valve 48 to open the flow path connected to the sensor 42 and the flow path connected to the filtration module 44, and to close the flow path connected to the ozone processing module 45. The control unit 50 also instructs the solenoid valve 432 to open and the solenoid valves 431 and 433 to close. As a result, the control unit 50 circulates the water treated in the biological treatment tank 20 and the water treated in the ozone processing module 45 so that they are continuously treated in the filtration module 44. The control unit 50 controls, for example, the opening and closing speed of the solenoid valves 48 and 432 so that the flow rate of the circulating water is a predetermined value.

[0095] In step S15, the control unit 50 sends the decolorized water to the treated water storage tank 30. Specifically, the control unit 50 instructs the solenoid valve 48 to open the flow path connected to the sensor 42 and the flow path connected to the filtration module 44, and to close the flow path connected to the ozone treatment module 45. The control unit 50 also opens the solenoid valve 433, closes the solenoid valves 431 and 432, and sends the water treated by the filtration module 44 to the treated water storage tank 30. While the control unit 50 is sending the water to the treated water storage tank 30, it may also close the valve installed between the biological treatment tank 20 and the decolorization treatment unit 40.

[0096] The control unit 50 may decide whether to perform decolorization in the filtration module 44 or in the ozone treatment module 45, depending on the sensing value of the sensor 42. For example, if the sensing value is above a predetermined value, the control unit 50 performs decolorization in the ozone treatment module 45 for a predetermined time, and then performs decolorization in the filtration module 44 for a predetermined time. If, after the decolorization in the filtration module 44 for a predetermined time, the sensing value does not fall below a predetermined value, the control unit 50 may perform decolorization in the ozone treatment module 45 again. Alternatively, if the sensing value is below a predetermined value, the control unit 50 may not perform decolorization in the ozone treatment module 45 for a predetermined time, but instead perform decolorization in the filtration module 44 for a predetermined time.

[0097] <9.4. Modification 4 of the decolorization processing unit 40> Figure 7 is a block diagram showing an example of the configuration of the decolorization processing unit 40. The decolorization processing unit 40 performs decolorization on water supplied from the biological treatment tank 20. Specifically, the decolorization processing unit 40 does not have an intermediate tank 41, for example, and does not store the water supplied from the biological treatment tank 20, but performs decolorization continuously. The decolorization processing unit 40 also performs decolorization on water stored in the treated water storage tank 30. The decolorization processing unit 40 shown in Figure 7 includes a check valve 49, a check valve 410, a solenoid valve 48, a sensor 42, solenoid valves 431 to 433, a filtration module 44, and an ozone treatment module 45. The decolorization processing unit 40 is connected to a first flow path that sends water to the treated water storage tank 30 and a second flow path that sends water stored in the treated water storage tank 30 to the decolorization processing unit 40. Pumps are installed in both the first and second flow paths, for example.

[0098] The check valve 410 is installed in the flow path connecting the sensor 42 and the valve group 43. Water that has passed through the sensor 42 is supplied to the valve group 43 via the check valve 410. The check valve 410 prevents water from flowing back from the valve group 43 to the sensor 42.

[0099] The control unit 50 controls, for example, the pump, solenoid valves 431-433, and solenoid valve 48 to supply water to the configured decolorization processing module.

[0100] Specifically, for example, when supplying water stored in the treated water storage tank 30 to the filtration module 44, the control unit 50 instructs the solenoid valve 48 to open the flow path connected to the sensor 42 and the flow path connected to the filtration module 44, and to close the flow path connected to the ozone treatment module 45. The control unit 50 also instructs the solenoid valve 432 to open and the solenoid valves 431 and 433 to close. Furthermore, the control unit 50 controls the pump to supply water to the filtration module 44 at a predetermined flow rate. The control unit 50 may also control the flow rate by adjusting the opening degree or opening / closing speed of the solenoid valves 48 and 432. For example, the control unit 50 controls the pump, solenoid valves 431-433, and solenoid valve 48 to maintain the water supply to the filtration module 44 until the sensing value reaches a predetermined value. Furthermore, the control unit 50 controls the pump, solenoid valves 431-433, and solenoid valve 48 to maintain the supply of water to the filtration module 44 until the maximum processing time has elapsed, even if the sensing value does not reach a predetermined value. Also, the control unit 50 controls the pump, solenoid valves 431-433, and solenoid valve 48 to maintain the supply of water to the filtration module 44 for at least the minimum processing time. The control unit 50 may combine at least two of these control requirements, for example.

[0101] Furthermore, for example, when supplying water stored in the treated water storage tank 30 to the ozone treatment module 45, the control unit 50 instructs the solenoid valve 48 to open the flow path connected to the sensor 42 and the flow path connected to the ozone treatment module 45, and to close the flow path connected to the filtration module 44. The control unit 50 also instructs the solenoid valve 431 to open and the solenoid valves 432 and 433 to close. The control unit 50 also controls the pump to supply water to the ozone treatment module 45 at a predetermined flow rate. The control unit 50 may also control the flow rate by adjusting the opening degree or opening / closing speed of the solenoid valves 48 and 431. For example, the control unit 50 controls the pump, solenoid valves 431-433, and solenoid valve 48 to maintain the water supply to the ozone treatment module 45 until the sensing value reaches a predetermined value. Furthermore, the control unit 50 controls the pump, solenoid valves 431-433, and solenoid valve 48 to maintain the supply of water to the ozone treatment module 45 until the maximum processing time has elapsed, even if the sensing value does not reach a predetermined value. Also, the control unit 50 controls the pump, solenoid valves 431-433, and solenoid valve 48 to maintain the supply of water to the ozone treatment module 45 for at least the minimum processing time. The control unit 50 may combine, for example, at least two of these control requirements.

[0102] Furthermore, for example, when supplying water to the flow path leading to the treated water storage tank 30, the control unit 50 instructs the solenoid valve 48 to open the flow path leading to the sensor 42 and the flow path leading to one module that was performing processing immediately before, and to close the flow path leading to the other module. The control unit 50 also instructs the solenoid valve 433 to open and the solenoid valves 431 and 432 to close. The control unit 50 also controls the pump to send water to the treated water storage tank 30 at a predetermined flow rate. The control unit 50 may also control the flow rate by adjusting the opening degree or opening / closing speed of the solenoid valves 48 and 433. When the decolorization process using the filtration module 44 and the ozone treatment module 45 is completed, the control unit 50 controls the pump, solenoid valves 431-433, and solenoid valve 48 to discharge water to the treated water storage tank 30.

[0103] The specific operation of the control unit 50 when performing decolorization treatment on the water stored in the treated water storage tank 30 will be explained with reference to Figure 3. In step S11 shown in Figure 3, the control unit 50 causes the decolorization processing unit 40 to perform decolorization treatment using the ozone processing module 45. Specifically, the control unit 50 closes the valve installed between it and the biological treatment tank 20. The control unit 50 instructs the solenoid valve 48 to open the flow path leading to the sensor 42 and the flow path leading to the ozone processing module 45, and to close the flow path leading to the filtration module 44. The control unit 50 instructs the solenoid valve 431 to open and the solenoid valves 432 and 433 to close. As a result, the control unit 50 circulates the water stored in the treated water storage tank 30 so that it is continuously treated by the ozone processing module 45. The control unit 50 controls the opening and closing speeds of, for example, the solenoid valves 48 and 431 so that the flow rate of the circulating water reaches a predetermined value.

[0104] In step S13, the control unit 50 causes the decolorization processing unit 40 to perform decolorization processing using the filtration module 44. Specifically, the control unit 50 instructs the solenoid valve 48 to open the flow path connected to the sensor 42 and the flow path connected to the filtration module 44, and to close the flow path connected to the ozone processing module 45. The control unit 50 also instructs the solenoid valve 432 to open and the solenoid valves 431 and 433 to close. As a result, the control unit 50 circulates the water treated in the biological treatment tank 20 and the water treated in the ozone processing module 45 so that they are continuously treated in the filtration module 44. The control unit 50 controls, for example, the opening and closing speed of the solenoid valves 48 and 432 so that the flow rate of the circulating water is a predetermined value.

[0105] In step S15, the control unit 50 sends the decolorized water to the treated water storage tank 30. Specifically, the control unit 50 instructs the solenoid valve 48 to open the flow path connected to the sensor 42 and the flow path connected to the filtration module 44, and to close the flow path connected to the ozone treatment module 45. The control unit 50 also opens the solenoid valve 433, closes the solenoid valves 431 and 432, and sends the water treated by the filtration module 44 to the treated water storage tank 30. Once the water has finished being sent to the treated water storage tank 30, the control unit 50 opens the valve.

[0106] The control unit 50 may determine whether to perform decolorization treatment in the filtration module 44 or in the ozone treatment module 45, depending on the sensing value of a predetermined sensor installed in the treated water storage tank 30. For example, if the chromaticity is above a predetermined value, the control unit 50 performs decolorization treatment in the ozone treatment module 45 for a predetermined time, and then performs decolorization treatment in the filtration module 44 for a predetermined time. If, after the decolorization treatment in the filtration module 44 for a predetermined time, the chromaticity does not fall below a predetermined value, the control unit 50 may perform decolorization treatment in the ozone treatment module 45 again. Alternatively, if the chromaticity is below a predetermined value, the control unit 50 may not perform decolorization treatment in the ozone treatment module 45 for a predetermined time, but instead perform decolorization treatment in the filtration module 44 for a predetermined time.

[0107] <9.5. Setting of Control Parameters> In the above embodiment, a case was described in which the processing time in the decolorization processing module is set according to the degree of the sensing value (chromaticity) acquired by the sensor 42. The processing time in the decolorization processing module is not limited to that based on sensing. The processing time in the decolorization processing module may be set, for example, based on the amount of treated water generated by the water treatment device 1. The amount of treated water generated by the water treatment device 1 may be determined, for example, from the water level of the treated water stored in the treated water storage tank 30, or from a flow meter installed in the decolorization processing unit 40.

[0108] For example, the control unit 50 increases the processing time in the decolorization processing module if the water level measured by the water level gauge installed in the treated water storage tank 30 exceeds a predetermined value. If there is sufficient treated water stored in the treated water storage tank 30, there is little need to rush the generation of treated water. Therefore, the priority of decolorizing the water may be increased over the generation of treated water. The increased processing time may be the time for decolorization processing by the filtration module 44, the time for decolorization processing by the ozone processing module 45, or the time for both decolorization processing methods.

[0109] Furthermore, for example, the control unit 50 increases the processing time in the decolorization processing module based on the water level measured by a water level gauge installed in the treated water storage tank 30 and the chromaticity measured by the sensor 42. Specifically, for example, if the water level in the treated water storage tank 30 exceeds a predetermined value and the chromaticity measured by the sensor 42 exceeds a predetermined value, the control unit 50 prioritizes decolorization processing over the generation of treated water and increases the processing time in the decolorization processing module.

[0110] Furthermore, the processing time in the decolorization processing module may be set based on, for example, water usage statistics. Water usage statistics represent, for example, what a consumer uses the treated water for at a given time on a given day. In other words, by referring to the water usage statistics, it becomes possible to understand how the treated water stored in the treated water storage tank 30 is being used. Based on the water usage statistics, if it is clear that water usage is low during a given time period, the control unit 50 increases the processing time in the decolorization processing module during that time period.

[0111] Furthermore, for example, the control unit 50 increases the processing time in the decolorization processing module based on statistical values ​​of water usage and the water level measured by a water level gauge installed in the treated water storage tank 30. Specifically, for example, if the water demand is less than a predetermined value and the water level in the treated water storage tank 30 exceeds a predetermined value, the control unit 50 prioritizes decolorization processing over the generation of treated water and increases the processing time in the decolorization processing module.

[0112] Furthermore, for example, the control unit 50 increases the processing time in the decolorization processing module based on statistical values ​​of water usage, the water level measured by a water level gauge installed in the treated water storage tank 30, and the chromaticity measured by the sensor 42. Specifically, for example, if the water demand is less than a predetermined value, and the water level in the treated water storage tank 30 exceeds a predetermined value, and the chromaticity measured by the sensor 42 exceeds a predetermined value, the control unit 50 prioritizes decolorization processing over the generation of treated water and increases the processing time in the decolorization processing module.

[0113] Furthermore, for example, if the water demand is above a predetermined value and the water level in the treated water storage tank 30 is below a predetermined value, and the chromaticity measured by the sensor 42 exceeds a predetermined value, that is, if there is a high need to expedite decolorization, the control unit 50 may extend the decolorization time by the filtration module 44 and shorten the decolorization time by the ozone treatment module 45. Since the decolorization process by the filtration module 44 reduces the chromaticity of the water faster than the decolorization process by the ozone treatment module 45, it is possible to obtain the decolorized water faster than usual.

[0114] Conversely, for example, when the water demand is below a predetermined value and the water level in the treated water storage tank 30 is above a predetermined value, if the chromaticity measured by the sensor 42 exceeds a predetermined value, that is, when there is little need to expedite decolorization, the decolorization time by the ozone treatment module 45 may be extended and the decolorization time by the filtration module 44 may be shortened. This makes it possible to extend the lifespan of the activated carbon in the filtration module 44.

[0115] Furthermore, the sensing value to be reached in the decolorization treatment module is not limited to that based on sensing. The sensing value to be reached may be set, for example, based on the amount of treated water produced by the water treatment device 1. For example, the control unit 50 lowers the sensing value to be reached when the water level measured by the water level gauge installed in the treated water storage tank 30 exceeds a predetermined value. If there is sufficient treated water stored in the treated water storage tank 30, there is little need to rush the generation of treated water. Therefore, the priority of decolorizing the water may be increased over the generation of treated water. The sensing value to be reached may be a reduction in the value of the decolorization treatment by the filtration module 44, a reduction in the value of the decolorization treatment by the ozone treatment module 45, or a reduction in the value of both decolorization treatments.

[0116] Furthermore, for example, the control unit 50 lowers the sensing value to be reached in the decolorization treatment module based on the water level measured by the water level gauge installed in the treated water storage tank 30 and the chromaticity measured by the sensor 42. Specifically, for example, if the water level in the treated water storage tank 30 exceeds a predetermined value and the chromaticity measured by the sensor 42 exceeds a predetermined value, the control unit 50 prioritizes decolorization treatment over the generation of treated water and lowers the sensing value to be reached in the decolorization treatment module.

[0117] Furthermore, the sensing value to be achieved in the decolorization processing module may be set, for example, based on water usage statistics. Based on water usage statistics, the control unit 50 lowers the sensing value to be achieved in the decolorization processing module during a predetermined time period if it is clear that water usage is low during that time period.

[0118] Furthermore, for example, the control unit 50 lowers the sensing value to be reached in the decolorization treatment module based on statistical values ​​of water usage and the water level measured by a water level gauge installed in the treated water storage tank 30. Specifically, for example, if the water demand is less than a predetermined value and the water level in the treated water storage tank 30 exceeds a predetermined value, the control unit 50 prioritizes decolorization treatment over the generation of treated water and lowers the sensing value to be reached in the decolorization treatment module.

[0119] Furthermore, for example, the control unit 50 lowers the sensing value to be reached in the decolorization treatment module based on statistical values ​​of water usage, the water level measured by a water level gauge installed in the treated water storage tank 30, and the chromaticity measured by the sensor 42. Specifically, for example, if the water demand is less than a predetermined value, and the water level in the treated water storage tank 30 exceeds a predetermined value, and the chromaticity measured by the sensor 42 exceeds a predetermined value, the control unit 50 prioritizes decolorization treatment over the generation of treated water and lowers the sensing value to be reached in the decolorization treatment module.

[0120] Furthermore, for example, if the water demand is above a predetermined value and the water level in the treated water storage tank 30 is below a predetermined value, and the chromaticity measured by the sensor 42 exceeds a predetermined value, that is, if there is a high need to expedite decolorization, the control unit 50 may raise the threshold for decolorization by the ozone treatment module 45 and switch to decolorization by the filtration module 44 earlier. Since the decolorization by the filtration module 44 reduces the chromaticity of the water faster than the decolorization by the ozone treatment module 45, it is possible to obtain the decolorized water sooner than usual.

[0121] Conversely, for example, when the water demand is below a predetermined value and the water level in the treated water storage tank 30 is above a predetermined value, if the chromaticity measured by the sensor 42 exceeds a predetermined value, that is, when there is little need to expedite decolorization, the threshold for decolorization treatment by the ozone treatment module 45 may be lowered, delaying the transition to decolorization treatment by the filtration module 44. This makes it possible to extend the lifespan of the activated carbon in the filtration module 44.

[0122] <9.6. Utilization of Sensing Values> The activated carbon filter included in the filtration module 44 needs to be replaced depending on the number of times it is used. The control unit 50 can monitor the sensing values ​​from the sensor 42 to understand the effect of the decolorization treatment from the sensing values. The control unit 50 may also monitor the transition of the sensing values ​​from the sensor 42 and, if it detects a deviation from the sensing values ​​when the activated carbon filter is operating normally, issue a notification that it is time to replace the activated carbon filter. In other words, the control unit 50 can indicate when it is time to perform maintenance on the filtration module 44.

[0123] <9.7. Other Modifications> In the above embodiment, the case in which there is one type of filtration module 44 has been described as an example, but the filtration module 44 in the decolorization processing unit 40 according to this embodiment is not limited to one type. The decolorization processing unit 40 may have multiple types of filtration modules equipped with different types of filters. In this case, the control unit 50 determines, for example, which type of filtration module to use to perform the processing, based on the installed filters. The control unit 50 also determines, for example, in what order to have the filtration modules perform the processing, based on the installed filters. In the decolorization processing unit 40, the water supplied to the multiple types of filtration modules is supplied, for example, via valves controlled by the control unit 50.

[0124] In the above embodiment, the case where there is one type of ozone treatment module 45 is described as an example, but the ozone treatment module 45 in the decolorization treatment unit 40 according to this embodiment is not limited to one type. The decolorization treatment unit 40 may have multiple types of ozone treatment modules of different types. In this case, the control unit 50 determines, for example, which type of ozone treatment module to use for processing, based on the effects of the ozone treatment. The control unit 50 also determines, for example, the order in which the ozone treatment modules should perform processing, based on the effects of the ozone treatment. In the decolorization treatment unit 40, the water supplied to the multiple types of ozone treatment modules is supplied, for example, via valves controlled by the control unit 50.

[0125] In the above embodiment, the case in which treatment by the filtration module 44 is performed following treatment by the ozone treatment module 45 is described as an example. The combination of decolorization treatment modules, treatment time, and the sensing value to be achieved may differ depending on the target water. For example, the combination of decolorization treatment modules, treatment time, and the sensing value to be achieved may differ depending on whether the water is used for toilet flushing, bathing, showering, laundry, dishwashing, etc. In this case, a default setting may be determined depending on the target water.

[0126] <Basic Hardware Configuration of Computer> Figure 8 is a block diagram showing the basic hardware configuration of computer 90. Computer 90 includes at least a processor 901, main memory 902, auxiliary storage 903, and a communication IF 991 (interface). These are electrically connected to each other by a communication bus 921.

[0127] The processor 901 is hardware for executing the instruction set described in the program. The processor 901 consists of an arithmetic unit, registers, peripheral circuits, etc.

[0128] The main memory 902 is for temporarily storing programs and data processed by programs, etc. For example, it is a volatile memory such as DRAM (Dynamic Random Access Memory).

[0129] The auxiliary storage device 903 is a storage device for storing data and programs. Examples include flash memory, HDD (Hard Disc Drive), magneto-optical disk, CD-ROM, DVD-ROM, semiconductor memory, etc.

[0130] A communication interface (IF991) is an interface for inputting and outputting signals for communication with other computers via a network using wired or wireless communication standards. The network consists of various mobile communication systems, such as the Internet, LANs, and wireless base stations. For example, networks include 3G, 4G, and 5G mobile communication systems, LTE (Long Term Evolution), and wireless networks (e.g., Wi-Fi®) that can connect to the Internet via designated access points. When connecting wirelessly, communication protocols include, for example, Z-Wave®, ZigBee®, and Bluetooth®. When connecting via wired connections, the network also includes connections made directly via USB (Universal Serial Bus) cables, etc.

[0131] Furthermore, by distributing all or part of each hardware configuration across multiple computers 90 and connecting them to each other via a network, a computer 90 can be virtually realized. Thus, the concept of computer 90 includes not only a computer 90 housed in a single enclosure or case, but also a virtualized computer system.

[0132] <Basic Functional Configuration of Computer 90> The functional configuration of the computer realized by the basic hardware configuration of computer 90 (Figure 8) is described below. The computer comprises at least one functional unit: a control unit, a memory unit, and a communication unit.

[0133] Furthermore, the functional units of computer 90 can also be realized by distributing all or part of each functional unit across multiple computers 90 interconnected via a network. The concept of computer 90 includes not only a single computer 90 but also a virtualized computer system.

[0134] The control unit is realized when the processor 901 reads various programs stored in the auxiliary storage device 903, loads them into the main memory device 902, and executes processing according to those programs. The control unit can realize various functional units that perform information processing depending on the type of program. In this way, the computer is realized as an information processing device that performs information processing.

[0135] The memory unit is implemented by a main memory 902 and an auxiliary memory 903. The memory unit stores data, various programs, and various databases. The processor 901 can also reserve memory areas corresponding to the memory unit in the main memory 902 or the auxiliary memory 903 according to the program. The control unit can also cause the processor 901 to perform addition, update, and deletion operations on data stored in the memory unit according to the various programs.

[0136] The term "database" refers to a relational database, which is used to manage and associate data sets called tables and masters, which are structured in a tabular format defined by rows and columns. In a database, tables are called tables, masters are called masters, the columns of tables are called columns, and the rows of tables are called records. In a relational database, relationships can be established and linked between tables and masters. Typically, each table and each master has a primary key column to uniquely identify a record, but setting a primary key for a column is not mandatory. The control unit can cause the processor 901 to add, delete, and update records in specific tables and masters stored in the storage unit according to various programs. Furthermore, by storing data, various programs, and various databases in the storage unit, the information processing device and information processing system described in this disclosure can be considered manufactured.

[0137] Furthermore, the databases and masters in this disclosure may include any data structures (lists, dictionaries, associative arrays, objects, etc.) in which information is structurally defined. Data structures also include data that can be considered as data structures by combining data with functions, classes, methods, etc., written in any programming language.

[0138] The communication unit is implemented by the communication IF 991. The communication unit implements the function of communicating with other computers 90 via the network. The communication unit can receive information transmitted from other computers 90 and input it to the control unit. The control unit can cause the processor 901 to perform information processing on the received information according to various programs. The communication unit can also transmit information output from the control unit to other computers 90.

[0139] Furthermore, each of the above-mentioned configurations, functions, processing units, processing means, etc., may be implemented in hardware, in whole or in part, for example, by designing them as integrated circuits. The present invention can also be implemented by software program code that realizes the functions of the embodiment. In this case, a storage medium on which the program code is recorded is provided to a computer, and the processor of that computer reads the program code stored in the storage medium. In this case, the program code read from the storage medium itself realizes the functions of the embodiment described above, and the program code itself and the storage medium on which it is stored constitute the present invention. Examples of storage media used to supply such program code include flexible disks, CD-ROMs, DVD-ROMs, hard disks, SSDs, optical disks, magneto-optical disks, CD-Rs, magnetic tapes, non-volatile memory cards, ROMs, and the like.

[0140] Furthermore, the program code that implements the functions described in this embodiment can be implemented in a wide range of programming or scripting languages, such as assembler, C / C++, Perl, Shell, PHP, and Java®.

[0141] Furthermore, the program code for the software that implements the functions of the embodiment may be distributed via a network and stored in a storage means such as a computer's hard disk or memory, or in a storage medium such as a CD-RW or CD-R, and the computer's processor may read and execute the program code stored in the storage means or storage medium.

[0142] The functions realized by the components described herein may be implemented in a circuit or processing circuitry, including general-purpose processors, application-specific processors, integrated circuits, ASICs (Application Specific Integrated Circuits), CPUs (a Central Processing Unit), conventional circuits, and / or combinations thereof, programmed to realize the described functions. A processor, including transistors and other circuits, is considered a circuit or processing circuitry. A processor may be a programmed processor that executes a program stored in memory. In this specification, circuitry, unit, and means are hardware programmed to realize or perform the described functions. Such hardware may be any hardware disclosed herein, or any hardware known to be programmed to realize or perform the described functions. If such hardware is a processor that is considered a type of circuitry, then such circuitry, means, or unit is a combination of hardware and software used to constitute such hardware and / or processor.

[0143] While several embodiments of this disclosure have been described above, these embodiments can be implemented in a variety of other forms, and various omissions, substitutions, and modifications are permitted without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims and their equivalents.

[0144] (Note) The matters described in each of the above embodiments are noted below.

[0145] (Note 1) A water treatment apparatus comprising: a sensor for measuring the water quality of the water passing through it; a valve for selectively supplying the water whose quality has been measured to a first channel, a second channel, or a third channel; a chemical treatment module for performing chemical treatment on the water supplied from the first channel; a physical treatment module for performing physical treatment on the water supplied from the second channel; and a control unit that controls the opening and closing of the valve based on the sensing results from the sensor, and after performing treatment in at least one of the chemical treatment module and the physical treatment module for a predetermined time, supplies water from the third channel. (Note 2) The water treatment apparatus according to (Note 1), wherein the control unit performs circulation in at least one of the chemical treatment module and the physical treatment module based on the sensing results from the sensor. (Note 3) The water treatment apparatus according to (Note 1) or (Note 2), wherein the chemical treatment module is a treatment module that utilizes an accelerated oxidation method. (Note 4) The water treatment apparatus according to any one of (Note 1) to (Note 3), wherein there are multiple types of chemical treatment modules and physical treatment modules. (Note 5) The control unit sets the processing time by the chemical processing module, the processing time by the physical processing module, or the processing time using both, according to the amount of water processed, the sensing results from the sensor, or a combination thereof, as described in any of (Note 1) to (Note 4). (Note 6) The control unit sets the processing time by the chemical processing module, the processing time by the physical processing module, or the processing time using both, according to the statistical values ​​of water usage, as described in (Note 5). (Note 7) The control unit sets the threshold value for the sensing result in the chemical processing module, the threshold value for the sensing result in the physical processing module, or the threshold value for the sensing result in both, according to the amount of water processed, the sensing results from the sensor, or a combination thereof, as described in (Note 5).(Note 8) The control unit sets the processing time by the chemical processing module, the processing time by the physical processing module, or the processing time using both, in accordance with the statistical values ​​of water usage, and sets the threshold for the sensing result in the chemical processing module, the threshold for the sensing result in the physical processing module, or the threshold for the sensing result in both, as described in (Note 7). (Note 9) The control unit indicates the maintenance timing for the physical processing module based on the transition of the sensing result by the sensor, as described in any of (Note 1) to (Note 8). (Note 10) A program executed in a water treatment apparatus comprising a processor and memory, wherein the water treatment apparatus comprises a sensor for measuring the quality of water passing through it, a valve for selectively supplying the water whose quality has been measured to a first channel, a second channel, or a third channel, a chemical treatment module for performing chemical treatment on the water supplied from the first channel, and a physical treatment module for performing physical treatment on the water supplied from the second channel, and the program causes the processor to execute the step of controlling the opening and closing of the valve based on the processing time in the chemical treatment module, the processing time in the physical treatment module, and the sensing results from the sensor, and after performing the processing in at least one of the chemical treatment module and the physical treatment module, supplying water from the third channel. (Note 11) A method to be performed by a water treatment apparatus comprising a processor and memory, wherein the water treatment apparatus comprises a sensor for measuring the quality of water passing through it, a valve for selectively supplying the water whose quality has been measured to a first channel, a second channel, or a third channel, a chemical treatment module for performing chemical treatment on the water supplied from the first channel, and a physical treatment module for performing physical treatment on the water supplied from the second channel, wherein the processor controls the opening and closing of the valve based on the processing time in the chemical treatment module, the processing time in the physical treatment module, and the sensing results from the sensor, and after performing the processing in at least one of the chemical treatment module and the physical treatment module, the method to perform the step of supplying water from the third channel.(Note 12) A system comprising: a sensor for measuring the water quality of the water passing through; a valve for selectively supplying the water whose quality has been measured to a first channel, a second channel, or a third channel; a chemical treatment module for performing chemical treatment on the water supplied from the first channel; a physical treatment module for performing physical treatment on the water supplied from the second channel; and a control unit that controls the opening and closing of the valve based on the processing time in the chemical module, the processing time in the physical treatment module, and the sensing results from the sensor, and after performing the treatment in at least one of the chemical treatment module and the physical treatment module, supplies water from the third channel.

[0146] 1...Water treatment device 10...Wastewater adjustment tank 20...Biological treatment tank 30...Treated water storage tank 40...Decolorization treatment unit 50...Control unit 100...Recirculating toilet

Claims

1. A water treatment apparatus comprising: a sensor for measuring the water quality of the water passing through it; a valve for selectively supplying the water whose quality has been measured to a first channel, a second channel, or a third channel; a chemical treatment module for performing chemical treatment on the water supplied from the first channel; a physical treatment module for performing physical treatment on the water supplied from the second channel; and a control unit that controls the opening and closing of the valve based on the sensing results from the sensor, and after performing treatment in at least one of the chemical treatment module and the physical treatment module for a predetermined time, supplies water from the third channel.

2. The water treatment apparatus according to claim 1, wherein the control unit performs circulation in at least one of the chemical treatment module and the physical treatment module based on the sensing results from the sensor.

3. The water treatment apparatus according to claim 1 or 2, wherein the chemical treatment module is a treatment module utilizing an accelerated oxidation method.

4. The water treatment apparatus according to any one of claims 1 to 3, wherein there are multiple types of chemical treatment modules and physical treatment modules.

5. The water treatment apparatus according to any one of claims 1 to 4, wherein the control unit sets the processing time by the chemical processing module, the processing time by the physical processing module, or the processing time using both, according to the amount of water processed, the sensing results from the sensor, or a combination thereof.

6. The water treatment apparatus according to claim 5, wherein the control unit sets the processing time by the chemical processing module, the processing time by the physical processing module, or the processing time using both, in accordance with the statistical values ​​of water usage.

7. The water treatment apparatus according to claim 5, wherein the control unit sets a threshold value for the sensing result in the chemical treatment module, a threshold value for the sensing result in the physical treatment module, or a threshold value for the sensing result in both, depending on the amount of treated water, the sensing result from the sensor, or a combination thereof.

8. The water treatment apparatus according to claim 7, wherein the control unit sets the processing time by the chemical processing module, the processing time by the physical processing module, or the processing time using both, in accordance with the statistical values ​​of water usage, and sets the threshold value of the sensing result in the chemical processing module, the threshold value of the sensing result in the physical processing module, or the threshold value of the sensing result in both.

9. The water treatment apparatus according to any one of claims 1 to 8, wherein the control unit indicates the maintenance timing for the physical processing module based on the transition of the sensing results from the sensor.

10. A program executed in a water treatment apparatus comprising a processor and memory, wherein the water treatment apparatus comprises a sensor for measuring the quality of water passing through it, a valve for selectively supplying the water whose quality has been measured to a first channel, a second channel, or a third channel, a chemical treatment module for performing chemical treatment on the water supplied from the first channel, and a physical treatment module for performing physical treatment on the water supplied from the second channel, and the program causes the processor to execute the steps of controlling the opening and closing of the valve based on the sensing results from the sensor, performing processing in at least one of the chemical treatment module and the physical treatment module for a predetermined time, and then supplying water from the third channel.

11. A method to be performed by a water treatment apparatus comprising a processor and memory, wherein the water treatment apparatus comprises a sensor for measuring the quality of water passing through it, a valve for selectively supplying the water whose quality has been measured to a first channel, a second channel, or a third channel, a chemical treatment module for performing chemical treatment on the water supplied from the first channel, and a physical treatment module for performing physical treatment on the water supplied from the second channel, wherein the processor controls the opening and closing of the valve based on the sensing result from the sensor, and after performing processing in at least one of the chemical treatment module and the physical treatment module for a predetermined time, the method to be performed by supplying water from the third channel.

12. A system comprising: a sensor for measuring the water quality of the water passing through it; a valve for selectively supplying the water whose quality has been measured to a first channel, a second channel, or a third channel; a chemical treatment module for performing chemical treatment on the water supplied from the first channel; a physical treatment module for performing physical treatment on the water supplied from the second channel; and a control unit that controls the opening and closing of the valve based on the sensing results from the sensor, and after performing the treatment in at least one of the chemical treatment module and the physical treatment module for a predetermined time, supplies water from the third channel.

Images