JP2007270524A - Circulating flush toilet system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circulating flush toilet system reduced as a whole in size and having increased decolorizing efficiency for filtrate water. <P>SOLUTION: This circulating flush toilet system 1 comprises an ozone decolorizing part 8 for decolorize the filtrate water by ozone. The ozone decolorizing part 8 comprises a first reaction tank 31 and a second reaction tank 32, a mixing pump 12, circulating pipes 41 to 47, and an ozone generator 13. By controlling solenoid valves 52 to 54 installed in the circulating pipes 41 to 47, a filtrate water circulation flow passage formed of the circulating pipes 41 to 47 can be alternately changed to a first circulation flow passage and a second circulation flow passage. Since the flush toilet system shares a part of the circulating pipes 41 to 47, the ozone decolorizing part 8 can be reduced in size. Since the circulation decolorization of the filtrate water in the first reaction tank and the circulation decolorization of the filtrate water in the second reaction tank are alternately performed, the filtrate water can be efficiently decolorized in a short time. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a circulating flush toilet system, and more particularly to a circulating flush toilet system capable of purifying sewage from a flush toilet and decolorizing with ozone.

  In the conventional circulating flush toilet system, the sewage from the flush toilet is supplied to a biological treatment tank, and biological treatment with microorganisms is performed. Then, the treated water biologically treated in the biological treatment tank is supplied to the filtration tank and filtered by passing through a filtration membrane disposed in the filtration tank. Further, the filtered water is supplied to a decoloring tank and decolorized by being mixed with ozone generated by an ozone generator. The decolorized water thus obtained is returned to the flush toilet by a pump and used again as wash water.

  The following methods are known as a method for decolorizing filtered water in a decolorization tank of such a circulating flush toilet system. For example, a method is known in which filtered water and ozone are mixed using a mixing pump, and the filtered water is decolored by circulating between ozone and a decolorizing tank. In addition, a method is known in which a diffuser tube is installed in a decoloring tank, and ozone is aerated to decolorize the filtered water in the decoloring tank by sending ozone into the diffuser pipe. However, in the former method, since it is the mixed water of filtered water and decolorized water that is sucked into the mixing pump, ozone cannot be applied only to the filtered water on which ozone has not yet acted. Even in the latter method, since ozone is aerated in the decolorization tank is a mixed water of filtered water and decolorized water, ozone cannot be applied only to the filtered water on which ozone does not act. Therefore, these methods have a problem that the contact efficiency between filtered water and ozone is poor.

Therefore, for example, the first and second reaction towers into which raw water flows from the raw water supply pipe, the ozone gas generating means for generating ozone, and the ozone gas generating means and the first and second reaction towers are respectively connected to the raw water and the ozone gas. And mixing the raw water and ozone gas by the first reaction tower and the first mixing means, and the raw water and ozone gas by the second reaction tower and the second mixing means. There has been known a decolorization and deodorization system provided with a flow path switching means for alternately switching between the above mixing operations (for example, see Patent Document 1). In this decolorization and deodorization system, the first and second mixing means are each independently provided with a mixing body that mixes and reacts a circulation pump, a circulation pipe, raw water, and ozone gas. The raw water in the first and second reaction towers is mixed with ozone gas by the first and second mixing bodies and is circulated through a circulation pipe by a circulation pump. Thus, by using two reaction towers instead of one reaction tower, decolorized water decolored by ozone can be sequentially supplied from the reaction tower to the storage tank, so that the contact efficiency between raw water and ozone can be improved. it can.
Japanese Patent Laid-Open No. 2005-230668

  However, in the decolorization and deodorization system described in Patent Document 1, the first and second mixing means are each provided with their own circulation pump, circulation piping, and mixing body. There was a problem. In addition, since there are a pair of circulation pump, circulation piping, and mixing body, there is a problem that the cost of these parts and structure is at least doubled.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a circulating flush toilet system capable of making the entire system compact and improving the decolorization efficiency of filtered water.

  To achieve the above object, the circulating flush toilet system of the invention according to claim 1 is a flush toilet, a biological treatment tank that receives sewage from the flush toilet and performs biological treatment, and treatment in the biological treatment tank A filtration tank for filtering the biologically treated water, a first reaction tank and a second reaction tank for receiving the filtered water filtered in the filtration tank, ozone generating means for generating ozone, the ozone generating means, Each of the reaction tank and the second reaction tank is connected to each other, and mixed decoloring means for generating decolorized water by mixing ozone with filtered water to generate decolorized water, and receiving and storing decolorized water generated by the mixed decolorizing means. A circulating flush toilet system in which the decolorized water stored in the reservoir is circulated to the flush toilet as wash water, and the mixed decoloring means is connected to the ozone generating means. A mixed pump that mixes ozone with filtered water, the mixed pump, and the filtered water mixed with ozone by operating the mixing pump is provided between the first reaction tank and the second reaction tank. A circulating pipe that circulates, the filtrate tank, a filtrate supply pipe provided between the first reaction tank and the second reaction tank, and a filtrate supply pipe provided in the filtrate water supply pipe; From the flow path from the filtration tank to the first reaction tank, or from the filtration tank to the second reaction tank, the filtered water flow path switching means, provided in the circulation pipe, the first reaction tank and the An annular circulation channel connecting a mixing pump, or a circulation channel switching means capable of switching to an annular circulation channel connecting the second reaction tank and the mixing pump; and connected to the circulation pipe; Decolorized water in the reaction tank or the second reaction tank Decolorized water supply pipe to be supplied to the distillation tank, and a decolorized water supply flow path opening / closing provided at a connecting portion between the decolorized water supply pipe and the circulation pipe, which opens and closes the flow path from the circulation pipe to the decolorized water supply pipe Means, first water amount detecting means for detecting the amount of water stored in the first reaction tank, second water amount detecting means for detecting the amount of water stored in the second reaction tank, and time for measuring the operation time of the pump Measuring means, time determining means for determining whether the measurement time measured by the time measuring means is equal to or longer than a predetermined time, and first determining whether the detected water amount of the first water amount detecting means is equal to or less than a lower limit water amount. 1 lower limit determining means; first upper limit determining means for determining whether the detected water amount of the first water amount detecting means is greater than or less than an upper limit water amount; and determining whether the detected water amount of the second water amount detecting means is greater than or less than the lower limit water amount Second lower limit judging means for performing the second water amount detection A second upper limit determining means for determining whether the detected water amount is greater than or less than the upper limit water amount, and when the first upper limit determining means determines that the detected water amount is less than the upper limit water amount, the flow path to the first reaction tank is opened. When the first switching instruction means for instructing the filtered water flow path switching means and the second upper limit determination means determine that the amount of water is less than the upper limit water amount, the flow path to the second reaction tank is opened. A pump operation instruction for instructing the operation of the mixing pump when the second switching instruction means for instructing the filtered water flow path switching means and the first upper limit determination means or the second upper limit determination means are determined to be equal to or greater than the upper limit water amount. And when the first upper limit determination means determines that the amount of water is equal to or greater than the upper limit water amount, the circulating flow is switched so as to switch the flow path of the circulation pipe to the flow path connecting the first reaction tank and the mixing means. First circulation channel for instructing path switching means When the conversion control means and the second upper limit determination means determine that the amount is equal to or greater than the upper limit water amount, the flow path of the circulation pipe is switched to the flow path connecting the second reaction tank and the mixing means. When the second circulation flow path switching control means for instructing the circulation flow path switching means and the first upper limit determination means or the second upper limit determination means determine that the amount is equal to or greater than the upper limit water amount, the operation of the ozone generation means The ozone generation instructing means for instructing and the time determining means determine that the ozone generation stopping means for stopping the ozone generating means when the time determining means is longer than a predetermined time, and the time determining means are determined to be longer than the predetermined time. A decoloring water supply channel opening instructing means for instructing the decoloring water supply channel opening / closing means to open a channel from the circulation pipe to the decoloring water supply pipe, and opening the decoloring water supply channel Of indicating means As shown, a flow path from the circulation pipe to the decolorized water supply pipe is opened, and decolorized water in the first reaction tank or the second reaction tank is placed in the storage tank through the decolorized water supply pipe. And a pump stopping means for stopping the mixing pump when the first lower limit judging means or the second lower limit judging means judges that the amount is less than the lower limit water amount.

  In addition to the configuration of the invention according to claim 1, the circulating flush toilet system of the invention according to claim 2 targets the filtered water in the first reaction tank and the second reaction tank for the predetermined time. The time required for decoloring to chromaticity is adjusted.

  The circulation flush toilet system of the invention according to claim 3 includes a flush toilet, a biological treatment tank that receives sewage from the flush toilet and performs biological treatment, and biological treatment water treated in the biological treatment tank. A filtration tank to be filtered, a first reaction tank and a second reaction tank that receive filtered water filtered in the filtration tank, ozone generating means for generating ozone, the ozone generating means, the first reaction tank, and the first Each of which is connected to two reaction tanks, and includes a mixing and decoloring means for generating decolorized water by mixing ozone with filtered water to generate decolorized water, and a storage tank for receiving and storing the decolorized water generated by the mixed decolorizing means, In the circulating flush toilet system in which the decolorized water stored in the storage tank is circulated to the flush toilet as wash water, the mixed decoloring means is connected to the ozone generating means, and the filtered water is mixed with ozone. A mixing pump and a circulating pipe provided between the first reaction tank and the second reaction tank, and circulating water through which filtered water mixed with ozone by operating the mixing pump is circulated. The filtration tank, the filtrate water supply pipe provided between the first reaction tank and the second reaction tank, and the filtrate water supply pipe provided from the filtration tank to the first reaction tank. Or a filtered water flow path switching means that can be switched to a flow path from the filtration tank to the second reaction tank, and a ring that is provided in the circulation pipe and connects the first reaction tank and the mixing pump. A circulation flow path switching means that can be switched to a circulation flow path, or an annular circulation flow path that connects the second reaction tank and the mixing pump, and the circulation piping, and the first reaction tank or the second Decolorization to supply decolorized water in reaction tank to the storage tank A depigmenting water supply channel opening / closing means provided at a connection portion between the depigmenting water supply tube and the circulation pipe and opening / closing a channel from the circulation pipe to the decolorization water supply pipe; and the first reaction. A first water amount detecting means for detecting the amount of water stored in the tank, a second water amount detecting means for detecting the amount of water stored in the second reaction tank, a time measuring means for measuring the operating time of the pump, and the time measurement. Time determination means for determining whether the measurement time measured by the means is equal to or greater than a predetermined time, first lower limit determination means for determining whether the detected water amount of the first water amount detection means is greater than or equal to a lower limit water amount, and First upper limit determining means for determining whether the detected water amount of the first water amount detecting means is greater than or less than the upper limit water amount; and second lower limit determining means for determining whether the detected water amount of the second water amount detecting means is equal to or greater than the lower limit water amount; The amount of water detected by the second water amount detection means is the upper limit. A second upper limit determining means for determining whether the amount of water is greater than or less than the amount of water; and the filtered water flow path to open the flow path to the first reaction tank when the first upper limit determination means determines that the amount of water is less than the upper limit water volume. When the first switching instruction means for instructing the switching means and the second upper limit determining means determine that the amount of water is less than the upper limit water amount, the filtered water flow path switching means is configured to open the flow path to the second reaction tank. A second switching instruction means for instructing, a pump operation instructing means for instructing an operation of the mixing pump when the first upper limit determining means or the second upper limit determining means determines that the amount of water is not less than an upper limit water amount; When the upper limit determination means determines that the amount of water is equal to or greater than the upper limit water amount, the circulation flow path switching means is instructed to switch the flow path of the circulation pipe to the flow path connecting the first reaction tank and the mixing means. A first circulation channel switching control means; 2 When the upper limit determination means determines that the amount of water is equal to or greater than the upper limit water amount, the circulation flow path switching means is instructed to switch the flow path of the circulation pipe to the flow path connecting the second reaction tank and the mixing means. Ozone generation instruction means for instructing the operation of the ozone generation means when it is determined that the second circulation flow path switching control means, the first upper limit determination means, or the second upper limit determination means is greater than or equal to the upper limit water amount. And the decolored water supply that instructs the decolorized water supply flow path opening / closing means to open the flow path from the circulation pipe to the decolorized water supply pipe when the time determining means determines that the time is longer than a predetermined time. The first lower limit determining means or the second lower limit determination means or the second lower limit determination means or the second lower limit determination means or the second lower limit determination means or the second lower limit determination means or the second lower limit determination means or the second lower limit determination means Lower limit judgment means is lower limit water volume When it is determined that the ozone generation means is full, the ozone generation stop means for stopping the ozone generation means and the flow path from the circulation pipe to the decolorization water supply pipe are opened by an instruction from the decoloration water supply flow path opening instruction means. And a pump stop means for stopping the mixing pump when the first lower limit judgment means or the second lower limit judgment means judges that the amount of water is less than the lower limit water amount.

  In addition to the configuration of the invention according to claim 3, the circulation flush toilet system of the invention according to claim 4 targets the filtered water in the first reaction tank and the second reaction tank for the predetermined time. The time required for decoloring to a predetermined chromaticity higher than the chromaticity is adjusted.

  Further, in the circulating flush toilet system of the invention according to claim 5, in addition to the configuration of the invention of claim 4, the predetermined chromaticity is the chromaticity of decolorized water when passing through the outlet of the decolorized water supply pipe. The adjustment is made to the extent that the target chromaticity is decolored.

  Moreover, in addition to the structure of the invention in any one of Claims 1 thru | or 5, the circulation type flush toilet system of the invention which concerns on Claim 6 is provided between the said storage tank and the said biological treatment tank, The said storage An overflow water pipe for overflowing decolorized water in the tank to the biological treatment tank, a full water detection means for detecting full water in the storage tank, and the full water detection means when the full water detection means does not detect full water, the first reaction tank and the first 2 Decoloring frequency counting means for counting the number of decoloring treatments in the reaction tank, and when the full water detecting means detects full water based on the count value of the decoloring frequency counting means, the decolorizing water supply channel opening / closing means is opened. And an overflow count setting means for setting an overflow count for overflowing the decolorized water in the storage tank, the decolorized water supply flow path opening instructing means, When the water detecting means detects the full water, according to the overflow number, characterized by instructing the opening of the bleaching water supply passage opening and closing means.

  Further, in the circulating flush toilet system of the invention according to claim 7, in addition to the configuration of the invention of claim 6, the overflow count setting means is configured such that the count value is greater than or equal to a predetermined count. The overflow count is set to be larger than the case of less than the predetermined count.

  Moreover, in addition to the structure of the invention in any one of Claims 1 thru | or 5, the circulation type flush toilet system of the invention which concerns on Claim 8 is provided between the said decoloring tank and the said biological treatment tank, The said storage An overflow water pipe for overflowing the decolorized water in the tank to the biological treatment tank, a full water detection means provided in the storage tank for detecting the full water of the decolorized water in the storage tank, the first reaction tank and the first 2 is provided in at least one of the two reaction tanks, and includes filtered water chromaticity detection means for detecting chromaticity of filtered water supplied into the first reaction tank or the second reaction tank, and the pump operation instruction means includes The mixing pump is not operated when the full water detecting means detects full water and the chromaticity detected by the filtered water chromaticity detecting means is less than a reference chromaticity.

  The circulation flush toilet system of the invention according to claim 9 includes a flush toilet, a biological treatment tank that receives sewage from the flush toilet and performs biological treatment, and biological treatment water treated in the biological treatment tank. A filtration tank to be filtered, a first reaction tank and a second reaction tank that receive filtered water filtered in the filtration tank, ozone generating means for generating ozone, the ozone generating means, the first reaction tank, and the first Each of which is connected to two reaction tanks, and includes a mixing and decoloring means for generating decolorized water by mixing ozone with filtered water to generate decolorized water, and a storage tank for receiving and storing the decolorized water generated by the mixed decolorizing means, In the circulating flush toilet system in which the decolorized water stored in the storage tank is circulated to the flush toilet as wash water, the mixed decoloring means is connected to the ozone generating means, and the filtered water is mixed with ozone. A mixing pump and a circulating pipe provided between the first reaction tank and the second reaction tank, and circulating water through which filtered water mixed with ozone by operating the mixing pump is circulated. The filtration tank, the filtrate water supply pipe provided between the first reaction tank and the second reaction tank, and the filtrate water supply pipe provided from the filtration tank to the first reaction tank. Or a filtered water flow path switching means that can be switched to a flow path from the filtration tank to the second reaction tank, and a ring that is provided in the circulation pipe and connects the first reaction tank and the mixing pump. A circulation flow path switching means that can be switched to a circulation flow path, or an annular circulation flow path that connects the second reaction tank and the mixing pump, and the circulation piping, and the first reaction tank or the second Decolorization to supply decolorized water in reaction tank to the storage tank A depigmenting water supply channel opening / closing means provided at a connection portion between the depigmenting water supply tube and the circulation pipe and opening / closing a channel from the circulation pipe to the decolorization water supply pipe; and the first reaction. First water amount detecting means for detecting the amount of water stored in the tank, second water amount detecting means for detecting the amount of water stored in the second reaction tank, and first detecting the chromaticity of the water stored in the first reaction tank. Chromaticity detection means, second chromaticity detection means for detecting chromaticity of water stored in the second reaction tank, and a first lower limit for determining whether the detected water amount of the first water amount detection means is greater than or less than a lower limit water amount Determining means, first upper limit determining means for determining whether the detected water amount of the first water amount detecting means is equal to or greater than an upper limit water amount, and first determining whether the detected water amount of the second water amount detecting means is equal to or greater than the lower limit water amount. 2 Determine whether the lower limit judgment means and the detected water quantity of the second water quantity detection means are greater than or less than the upper limit water quantity. A second chromaticity detecting means, a first chromaticity judging means for judging whether or not a detected chromaticity of the first chromaticity detecting means is equal to or less than a predetermined chromaticity, and a detected chromaticity of the second chromaticity detecting means A second chromaticity determining means for determining whether or not the chromaticity is equal to or less than a predetermined chromaticity and a flow path to the first reaction tank is opened when the first upper limit determining means determines that the amount is less than the upper limit water amount When the first switching instruction means for instructing the filtrate flow path switching means and the second upper limit determination means determine that the amount of water is less than the upper limit water amount, the filtered water flow is set to open the flow path to the second reaction tank. A second switching instruction means for instructing a path switching means; and a pump operation instruction means for instructing the operation of the mixing pump when the first upper limit determination means or the second upper limit determination means determines that the amount is equal to or greater than the upper limit water amount; , When the first upper limit determining means determines that the amount is equal to or greater than the upper limit water amount, A first circulation flow path switching control means for instructing the circulation flow path switching means to switch a flow path of the ring piping to a flow path connecting the first reaction tank and the mixing means; and the second upper limit determination means. Is determined to be equal to or greater than the upper limit water amount, the second circulation instructing the circulation flow path switching means to switch the flow path of the circulation pipe to the flow path connecting the second reaction tank and the mixing means. An ozone generation instruction means for instructing the operation of the ozone generation means when the flow path switching control means, the first upper limit determination means, or the second upper limit determination means determines that the amount is equal to or greater than the upper limit water amount; When the one chromaticity judging means or the second chromaticity judging means judges that the chromaticity is not more than a predetermined chromaticity, the decolorized water supply flow path is opened and closed so as to open a flow path from the circulation pipe to the decolorized water supply pipe. Decolorizing water supply channel opening instruction hand indicating means And the first lower limit determining means or the second lower limit determining means is a lower limit in a state where the flow path from the circulation pipe to the decolorized water supply pipe is opened by an instruction from the decolorized water supply flow path opening instruction means. When it is determined that the amount of water is less than the amount of water, the ozone generation stop means for stopping the ozone generation means and the flow path from the circulation pipe to the decolorization water supply pipe are instructed by the decoloration water supply flow path opening instruction means. And a pump stopping means for stopping the mixing pump when the first lower limit determining means or the second lower limit determining means determines that it is less than the lower limit water amount in the opened state.

  Further, in the circulating flush toilet system of the invention according to claim 10, in addition to the configuration of the invention of claim 9, the predetermined chromaticity is the chromaticity of decolorized water when passing through the outlet of the decolorized water supply pipe. The adjustment is made so that the color is decolored to the target chromaticity.

  Moreover, in addition to the structure of the invention of Claim 9 or 10, the circulation flush toilet system of the invention which concerns on Claim 11 is provided between the said storage tank and the said biological treatment tank, An overflow water pipe for overflowing decolorized water into the biological treatment tank, a full water detection means for detecting full water in the storage tank, and the first reaction tank and the second reaction tank when the full water detection means does not detect full water Based on the count value of the decoloring frequency counting means, and when the full water detection means detects full water, the decoloring water supply flow path opening / closing means is opened, An overflow count setting means for setting an overflow count for overflowing the decolorized water in the storage tank, and the decolorized water supply flow path opening instructing means is configured to fill the full water When the knowledge device detects the full water, according to the overflow number, characterized by instructing the opening of the bleaching water supply passage opening and closing means.

  Further, in the circulating flush toilet system of the invention according to claim 12, in addition to the configuration of the invention of claim 11, the overflow count setting means is configured such that the count value is greater than or equal to a predetermined count. The overflow count is set to be larger than the case of less than the predetermined count.

  Moreover, the circulating flush toilet system of the invention according to claim 13 is provided between the decoloring tank and the biological treatment tank in addition to the configuration of the invention according to claim 9 or 10, and is provided in the storage tank. An overflow water pipe for overflowing decolorized water to the biological treatment tank, a full water detection means provided in the storage tank for detecting the full water of the decolorized water in the storage tank, the first reaction tank and the second reaction tank And a filtered water chromaticity detecting means for detecting the chromaticity of the filtered water supplied into the first reaction tank or the second reaction tank, and the pump operation instruction means includes the full water When the detection means detects full water and the chromaticity detected by the filtered water chromaticity detection means is less than a reference chromaticity, the mixing pump is not operated.

  In the circulating flush toilet system according to claim 1, sewage from the flush toilet is treated in a biological treatment tank and filtered in a filtration tank. The filtered water is supplied to the first reaction tank and the second reaction tank, and ozone decolorized by the mixed decoloring means. The decolorized water that has been decolorized by ozone is supplied to the storage tank and is recycled to the flush toilet. In this circulating flush toilet system, the filtrate in the filtration tank is supplied toward the first reaction tank or the second reaction tank by flowing through the flow path in the filtrate supply pipe. And the flow path in a filtrate supply pipe | tube is each switched to the flow path to a 1st reaction tank, and the flow path to a 2nd reaction tank by the switching operation of a filtrate water supply switching means. The amount of water stored in the first reaction tank is detected by the first water amount detection means, and the amount of water stored in the second reaction tank is detected by the second water amount detection means. Here, for example, when the first upper limit determination means determines that the amount of water stored in the first reaction tank is less than the upper limit water volume, the first switching instruction means performs filtration so as to open the flow path to the first reaction tank. A water flow path switching means is instructed. Thereby, filtered water can be supplied in a 1st reaction tank. On the other hand, when the second upper limit determination means determines that the amount of water stored in the second reaction tank is less than the upper limit water volume, the second switching instruction means switches the filtered water flow path so as to open the flow path to the second reaction tank. Means are indicated. Thereby, filtered water can be supplied in a 2nd reaction tank.

  And the filtered water in a 1st reaction tank or a 2nd reaction tank passes through circulation piping, is mixed with the ozone generated by the ozone generation means with the mixing pump, and reacts. Furthermore, the filtered water mixed with ozone by the mixing pump circulates between the first reaction tank or the second reaction tank through the circulation pipe by the discharge operation of the mixing pump. The circulation channel is switched to a channel connecting the mixing pump and the first reaction tank and a channel connecting the mixing pump and the second reaction tank by the operation of the circulation channel switching means. Here, for example, when the first upper limit determination means determines that the amount of water stored in the first reaction tank is greater than or equal to the upper limit water amount, the first circulation flow path switching control means causes the flow of the circulation pipe to be changed to the first reaction flow. The circulation flow path switching means is controlled so as to switch to the flow path connecting the tank and the mixing pump. Then, the operation of the ozone generation means is instructed by the ozone generation instruction means. Further, the operation of the mixing pump is instructed by the pump operation instruction means. Thereby, since the filtered water in a 1st reaction tank can be circulated through a circulation piping between a 1st reaction tank and a mixing pump, filtered water can be decolored efficiently.

  On the other hand, when the second upper limit determination means determines that the amount of water stored in the second reaction tank is greater than or equal to the upper limit water amount, the second circulation path switching control means causes the circulation pipe to be connected to the second reaction tank. The circulation flow path switching means is controlled so as to switch to the flow path connecting to the mixing pump. Then, the operation of the ozone generation means is instructed by the ozone generation instruction means. Further, the operation of the mixing pump is instructed by the pump operation instruction means. Thereby, since the filtered water in a 2nd reaction tank can be circulated through a circulation piping between a 2nd reaction tank and a mixing pump, filtered water can be decolored efficiently.

  As described above, when the filtered water in the first reaction tank and the second reaction tank is circulated and decolored, the operation of the circulation flow path switching means is controlled, so that the flow paths in the circulation piping are respectively switched. One circulation pipe can be shared. Thereby, since a circulating flush toilet system can be made compact, installation space can be reduced. Furthermore, since the filtered water in the first reaction tank and the second reaction tank can be circulated with a single mixing pump, the circulating flush toilet system can be made more compact. In addition, since the circulation pipe and the mixing pump can be shared, the cost of parts can be saved.

  The operation time of the mixing pump is measured by a time measuring means. Then, when the predetermined time determination means determines that the measurement time is equal to or longer than the predetermined time, the operation of the ozone generation means is stopped by the ozone generation stop means. Further, the decolorized water supply flow path opening instruction means instructs the decolorized water supply flow path opening / closing means to open the flow path from the circulation pipe to the decolorized water supply pipe. Thereby, the decolorized water produced | generated in the 1st reaction tank or the 2nd reaction tank can be supplied to a storage tank via a circulation piping and a decolored water supply pipe. When the first lower limit determination means or the second lower limit determination means determines that the amount of water is less than the lower limit water amount, the decolorizing water to be supplied to the storage tank is not in the first reaction tank or the second reaction tank, so the pump is stopped. The mixing pump is stopped by means. Thereby, when there is no decoloring water of a 1st reaction tank or a 2nd reaction tank, since a mixing pump can be stopped automatically, electric power cost can be saved.

  In addition, in the circulating flush toilet system of the invention according to claim 2, in addition to the effect of the invention of claim 1, the filtered water in the first reaction tank and the second reaction tank reaches the target chromaticity for a predetermined time. Since the time required for decolorization is adjusted, the filtered water in the first reaction tank or the second reaction tank can be automatically decolored to the target chromaticity by operating the mixing pump for a predetermined time. . Therefore, decolored water that has been decolored to the target chromaticity can always be supplied into the storage tank.

  In the circulating flush toilet system of the invention according to claim 3, the sewage from the flush toilet is treated in the biological treatment tank and filtered in the filtration tank. The filtered water is supplied to the first reaction tank and the second reaction tank, and ozone decolorized by the mixed decoloring means. The decolorized water that has been decolorized by ozone is supplied to the storage tank and is recycled to the flush toilet. In this circulating flush toilet system, the filtrate in the filtration tank is supplied toward the first reaction tank or the second reaction tank by flowing through the flow path in the filtrate supply pipe. And the flow path in a filtrate supply pipe | tube is each switched to the flow path to a 1st reaction tank, and the flow path to a 2nd reaction tank by the switching operation of a filtrate water supply switching means. The amount of water stored in the first reaction tank is detected by the first water amount detection means, and the amount of water stored in the second reaction tank is detected by the second water amount detection means. Here, for example, when the first upper limit determination means determines that the amount of water stored in the first reaction tank is less than the upper limit water volume, the first switching instruction means performs filtration so as to open the flow path to the first reaction tank. A water flow path switching means is instructed. Thereby, filtered water can be supplied in a 1st reaction tank. On the other hand, when the second upper limit determination means determines that the amount of water stored in the second reaction tank is less than the upper limit water volume, the second switching instruction means switches the filtered water flow path so as to open the flow path to the second reaction tank. Means are indicated. Thereby, filtered water can be supplied in a 2nd reaction tank.

  And the filtered water in a 1st reaction tank or a 2nd reaction tank passes through circulation piping, is mixed with the ozone generated by the ozone generation means with the mixing pump, and reacts. Furthermore, the filtered water mixed with ozone by the mixing pump circulates between the first reaction tank or the second reaction tank through the circulation pipe by the discharge operation of the mixing pump. The circulation channel is switched to a channel connecting the mixing pump and the first reaction tank and a channel connecting the mixing pump and the second reaction tank by the operation of the circulation channel switching means. Here, for example, when the first upper limit determination means determines that the amount of water stored in the first reaction tank is greater than or equal to the upper limit water amount, the first circulation flow path switching control means causes the flow of the circulation pipe to be changed to the first reaction flow. The circulation flow path switching means is controlled so as to switch to the flow path connecting the tank and the mixing pump. Then, the operation of the ozone generation means is instructed by the ozone generation instruction means. Further, the operation of the mixing pump is instructed by the pump operation instruction means. Thereby, since the filtered water in a 1st reaction tank can be circulated through a circulation piping between a 1st reaction tank and a mixing pump, filtered water can be decolored efficiently.

  On the other hand, when the second upper limit determination means determines that the amount of water stored in the second reaction tank is greater than or equal to the upper limit water amount, the second circulation path switching control means causes the circulation pipe to be connected to the second reaction tank. The circulation flow path switching means is controlled so as to switch to the flow path connecting to the mixing pump. Then, the operation of the ozone generation means is instructed by the ozone generation instruction means. Further, the operation of the mixing pump is instructed by the pump operation instruction means. Thereby, since the filtered water in a 2nd reaction tank can be circulated through a circulation piping between a 2nd reaction tank and a mixing pump, filtered water can be decolored efficiently.

  As described above, when the filtered water in the first reaction tank and the second reaction tank is circulated and decolored, the operation of the circulation flow path switching means is controlled, so that the flow paths in the circulation piping are respectively switched. One circulation pipe can be shared. Thereby, since a circulating flush toilet system can be made compact, installation space can be reduced. Furthermore, since the filtered water in the first reaction tank and the second reaction tank can be circulated with a single mixing pump, the circulating flush toilet system can be made more compact. In addition, since the circulation pipe and the mixing pump can be shared, the cost of parts can be saved.

  The operation time of the mixing pump is measured by a time measuring means. When the predetermined time determining means determines that the measurement time is equal to or longer than the predetermined time, the decolorized water supply flow path opening instructing means opens the flow path from the circulation pipe to the decolorized water supply pipe. Supply channel opening / closing means is instructed. At this time, since the ozone generating means continues to generate ozone, the mixing pump further mixes ozone with decolorized water. Thereby, even when passing through the decolorized water supply pipe, the mixed decolorization is performed by ozone, so that the time required for ozone decoloration of the filtered water can be further shortened.

  And when the flow path from the circulation pipe to the decolorized water supply pipe is opened by the instruction of the decolorized water supply flow path opening instruction means, the first lower limit determination means or the second lower limit determination means is less than the lower limit water amount. When the determination is made, the ozone generation means is stopped by the ozone generation stop means. Further, the operation of the mixing pump is stopped by the pump stop means. Thereby, when there is no decolorized water which should be supplied to a storage tank in a 1st reaction tank or a 2nd reaction tank, both an ozone generation means and a mixing pump can be stopped automatically.

  In addition, in the circulating flush toilet system of the invention according to claim 4, in addition to the effect of the invention of claim 3, mixed decolorization with ozone is also performed when passing through the decolorized water supply pipe, so filtered water The predetermined time required for ozone decolorization can be shortened to the time required for decoloring to a predetermined chromaticity higher than the target chromaticity. Thereby, since it is possible to shorten the time from the start of circulating decolorization of the filtered water to the completion of the supply to the storage tank, the filtered water can be decolorized efficiently and quickly.

  In addition, in the circulating flush toilet system of the invention according to claim 5, in addition to the effect of the invention of claim 4, the predetermined chromaticity is the chromaticity of decolorized water when passing through the outlet of the decolorized water supply pipe. It is adjusted to the extent that it has been decolored to chromaticity. As a result, the decolorized water that has been decolorized in the first reaction tank or the second reaction tank for a predetermined time is decolored to a predetermined chromaticity, and further decolorized when passing through the decolorized water supply pipe. When passing through the exit, decolorized water that has been decolored to the target chromaticity can be obtained.

  Further, in the circulating flush toilet system of the invention according to claim 6, in addition to the effect of the invention according to any one of claims 1 to 5, by supplying decolorized water to the storage tank with a mixing pump, The decolorized water can be overflowed into the biological treatment tank through the overflow water pipe. Thereby, since the chromaticity of the biological treatment water in a biological treatment tank can be diluted by adjusting the amount of overflow water, the chromaticity of filtered water can be adjusted.

  Further, the decoloring frequency counting means can count the number of decoloring treatments in the first reaction tank and the second reaction tank when the full water detection means does not detect full water. For example, in a time zone with high usage frequency such as daytime, the decolorized water in the storage tank is always used and does not become full. Therefore, the decoloring number counting means can count the number of decoloring processes in the daytime. And the overflow frequency setting means can set the overflow frequency that causes the decolorized water in the storage tank to overflow according to the count value counted by the decolorization frequency counting means. Furthermore, the use frequency of the flush toilet can be estimated from the count value of the decoloring frequency counting means, and the chromaticity of the filtered water can be estimated. Thereby, since the amount of overflow water can be adjusted according to the chromaticity of filtered water, the chromaticity of filtered water can be adjusted.

  Further, in the circulating flush toilet system of the invention according to claim 7, in addition to the effect of the invention of claim 6, the frequency of use of the flush toilet and the chromaticity of filtrate water with respect to the count value of the decoloring frequency counting means Therefore, the overflow count setting means can set the overflow count in proportion to the chromaticity of the filtered water. Furthermore, the overflow count setting means sets the overflow count more when the count value of the decolorization count count means is equal to or greater than the predetermined count, compared with the case where the count value is less than the predetermined count. The amount of water can be adjusted. Therefore, since filtered water is diluted according to the chromaticity of filtered water, the chromaticity of filtered water can be maintained at a fixed level. Furthermore, the load applied to the ozone generating means can be reduced by maintaining the chromaticity of the filtered water at a constant level.

  In addition, in the circulating flush toilet system of the invention according to claim 8, in addition to the effect of the invention according to any one of claims 1 to 5, by supplying decolorized water to the storage tank with a mixing pump, The decolorized water can be overflowed into the biological treatment tank through the overflow water pipe. Thereby, since the chromaticity of the biological treatment water in a biological treatment tank can be diluted by adjusting the amount of overflow water, the chromaticity of filtered water can be adjusted.

  And when the full water detection means detects that the storage tank is full, the chromaticity of the filtrate supplied to the first reaction tank or the second reaction tank detected by the filtrate chromaticity detection means is less than the reference chromaticity. It is estimated that the frequency of use of flush toilets was low. In this case, since the pump operation instruction means does not operate the mixing pump, the decolorized water in the storage tank does not overflow into the biological treatment tank.

  On the contrary, when the chromaticity of the filtrate supplied to the first reaction tank or the second reaction tank detected by the filtered water chromaticity detection means is equal to or higher than the reference chromaticity, the flush toilet was used frequently. Is guessed. In this case, the pump operation instruction means operates the mixing pump as usual to overflow the decolorized water in the storage tank into the biological treatment tank. Thereby, since the chromaticity of filtered water falls, the chromaticity which rose can be lowered | hung. Thus, since the amount of overflow water can be adjusted with the chromaticity of filtered water, the chromaticity of filtered water can be maintained within a fixed range.

  In the circulating flush toilet system of the invention according to claim 9, sewage from the flush toilet is treated in a biological treatment tank and filtered in a filtration tank. The filtered water is supplied to the first reaction tank and the second reaction tank, and ozone decolorized by the mixed decoloring means. The decolorized water that has been decolorized by ozone is supplied to the storage tank and is recycled to the flush toilet. In this circulating flush toilet system, the filtrate in the filtration tank is supplied toward the first reaction tank or the second reaction tank by flowing through the flow path in the filtrate supply pipe. And the flow path in a filtrate supply pipe | tube is each switched to the flow path to a 1st reaction tank, and the flow path to a 2nd reaction tank by the switching operation of a filtrate water supply switching means. The amount of water stored in the first reaction tank is detected by the first water amount detection means, and the amount of water stored in the second reaction tank is detected by the second water amount detection means. Here, for example, if the first lower limit determination means determines that the amount of water stored in the first reaction tank is less than the lower limit water volume, the first switching instruction means performs filtration so as to open the flow path to the first reaction tank. A water flow path switching means is instructed. Thereby, since filtered water is supplied in a 1st reaction tank, the filtered water in a 1st reaction tank can be maintained more than a minimum amount of water. On the other hand, when the second lower limit judging means judges that the amount of water stored in the second reaction tank is less than the lower limit water quantity, the second switching instruction means switches the filtered water flow path so as to open the flow path to the second reaction tank. Means are indicated. Thereby, since filtered water is supplied in a 2nd reaction tank, the filtered water in a 2nd reaction tank can be maintained more than a minimum amount of water.

  And the filtered water in a 1st reaction tank or a 2nd reaction tank passes through circulation piping, is mixed with the ozone generated by the ozone generation means with the mixing pump, and reacts. Furthermore, the filtered water mixed with ozone by the mixing pump circulates between the first reaction tank or the second reaction tank through the circulation pipe by the discharge operation of the mixing pump. The circulation channel is switched to a channel connecting the mixing pump and the first reaction tank and a channel connecting the mixing pump and the second reaction tank by the operation of the circulation channel switching means. Here, for example, when the first upper limit determination means determines that the amount of water stored in the first reaction tank is greater than or equal to the upper limit water amount, the first circulation flow path switching control means causes the flow of the circulation pipe to be changed to the first reaction flow. The circulation flow path switching means is controlled so as to switch to the flow path connecting the tank and the mixing pump. Then, the operation of the ozone generation means is instructed by the ozone generation instruction means. Further, the operation of the mixing pump is instructed by the pump operation instruction means. Thereby, since the filtered water in a 1st reaction tank can be circulated through a circulation piping between a 1st reaction tank and a mixing pump, filtered water can be decolored efficiently.

  On the other hand, when the second upper limit determination means determines that the amount of water stored in the second reaction tank is greater than or equal to the upper limit water amount, the second circulation path switching control means causes the circulation pipe to be connected to the second reaction tank. The circulation flow path switching means is controlled so as to switch to the flow path connecting to the mixing pump. Then, the operation of the ozone generation means is instructed by the ozone generation instruction means. Further, the operation of the mixing pump is instructed by the pump operation instruction means. Thereby, since the filtered water in a 2nd reaction tank can be circulated through a circulation piping between a 2nd reaction tank and a mixing pump, filtered water can be decolored efficiently.

  As described above, when the filtered water in the first reaction tank and the second reaction tank is circulated and decolored, the operation of the circulation flow path switching means is controlled, so that the flow paths in the circulation piping are respectively switched. One circulation pipe can be shared. Thereby, since a circulating flush toilet system can be made compact, installation space can be reduced. Furthermore, since the filtered water in the first reaction tank and the second reaction tank can be circulated with a single mixing pump, the circulating flush toilet system can be made more compact. In addition, since the circulation pipe and the mixing pump can be shared, the cost of parts can be saved.

  Further, the chromaticity of the water stored in the first reaction tank is detected by the first chromaticity detection means. On the other hand, the chromaticity of the stored water in the second reaction tank is detected by the second chromaticity detection means. And when the decolorization process of the filtered water in a 1st reaction tank or a 2nd reaction tank advances and it is judged that it is below predetermined chromaticity by the 1st chromaticity judgment means or the said 2nd chromaticity judgment means, decolored water The decoloring water supply flow path opening / closing means is instructed by the supply flow path opening instructing means to open the flow path from the circulation pipe to the decolorized water supply pipe. At this time, since the ozone generating means continues to generate ozone, the mixing pump further mixes ozone with decolorized water. Thereby, even when passing through the decolorized water supply pipe, the mixed decolorization is performed by ozone, so that the time required for ozone decoloration of the filtered water can be further shortened.

  And when the flow path from the circulation pipe to the decolorized water supply pipe is opened by the instruction of the decolorized water supply flow path opening instruction means, the first lower limit determination means or the second lower limit determination means is less than the lower limit water amount. When the determination is made, the ozone generation means is stopped by the ozone generation stop means. Further, the operation of the mixing pump is stopped by the pump stop means. Thereby, when there is no decolorized water which should be supplied to a storage tank in a 1st reaction tank or a 2nd reaction tank, both an ozone generation means and a mixing pump can be stopped automatically.

  In addition, in the circulating flush toilet system of the invention according to claim 10, in addition to the effect of the invention of claim 9, the predetermined chromaticity is the chromaticity of the decolorized water when passing through the outlet of the decolorized water supply pipe. It is adjusted to the extent that it has been decolored to chromaticity. As a result, the decolorized water that has been decolorized in the first reaction tank or the second reaction tank for a predetermined time is decolored to a predetermined chromaticity, and further decolorized when passing through the decolorized water supply pipe. When passing through the exit, decolorized water that has been decolored to the target chromaticity can be obtained.

  In addition, in the circulating flush toilet system of the invention according to claim 11, in addition to the effect of the invention of claim 9 or 10, decolorized water in the storage tank is supplied by supplying decolorized water to the storage tank with a mixing pump. Can overflow into the biological treatment tank via the overflow water pipe. Thereby, since the chromaticity of the biological treatment water in a biological treatment tank can be diluted by adjusting the amount of overflow water, the chromaticity of filtered water can be adjusted.

  Further, the decoloring frequency counting means can count the number of decoloring treatments in the first reaction tank and the second reaction tank when the full water detection means does not detect full water. For example, in a time zone with high usage frequency such as daytime, the decolorized water in the storage tank is always used and does not become full. Therefore, the decoloring number counting means can count the number of decoloring processes in the daytime. And the overflow frequency setting means can set the overflow frequency that causes the decolorized water in the storage tank to overflow according to the count value counted by the decolorization frequency counting means. Furthermore, the use frequency of the flush toilet can be estimated from the count value of the decoloring frequency counting means, and the chromaticity of the filtered water can be estimated. Thereby, since the amount of overflow water can be adjusted according to the chromaticity of filtered water, the chromaticity of filtered water can be adjusted.

  Further, in the circulating flush toilet system of the invention according to claim 12, in addition to the effect of the invention of claim 11, the frequency of use of the flush toilet and the chromaticity of filtrate water with respect to the count value of the decoloring frequency counting means Therefore, the overflow count setting means can set the overflow count in proportion to the chromaticity of the filtered water. Furthermore, the overflow count setting means sets the overflow count more when the count value of the decolorization count count means is equal to or greater than the predetermined count, compared with the case where the count value is less than the predetermined count. The amount of water can be adjusted. Therefore, since filtered water is diluted according to the chromaticity of filtered water, the chromaticity of filtered water can be maintained at a fixed level. Furthermore, the load applied to the ozone generating means can be reduced by maintaining the chromaticity of the filtered water at a constant level.

  Further, in the circulating flush toilet system of the invention according to claim 13, in addition to the effect of the invention of claim 9 or 10, decolorizing water in the decoloring tank is supplied by supplying decoloring water to the decoloring tank with a mixing pump. Can overflow into the biological treatment tank via the overflow water pipe. Thereby, by adjusting the amount of overflow water, the chromaticity of the biologically treated water in the biologically treated tank can be diluted, and the chromaticity of the filtered water filtered in the filtration tank can be adjusted.

  And when the full water detection means detects that the storage tank is full, the chromaticity of the filtrate supplied to the first reaction tank or the second reaction tank detected by the filtrate chromaticity detection means is less than the reference chromaticity. It is estimated that the frequency of use of flush toilets was low. In this case, since the pump operation instruction means does not operate the mixing pump, the decolorized water in the storage tank does not overflow into the biological treatment tank.

  On the contrary, when the chromaticity of the filtrate supplied to the first reaction tank or the second reaction tank detected by the filtered water chromaticity detection means is equal to or higher than the reference chromaticity, the flush toilet was used frequently. Is guessed. In this case, the pump operation instruction means operates the mixing pump as usual to overflow the decolorized water in the storage tank into the biological treatment tank. Thereby, since the chromaticity of filtered water falls, the chromaticity which rose can be lowered | hung. Thus, since the amount of overflow water can be adjusted with the chromaticity of filtered water, the chromaticity of filtered water can be maintained within a fixed range.

  Hereinafter, the circulating flush toilet system 1 which is the 1st Embodiment of this invention is demonstrated based on drawing. FIG. 1 is a block diagram of the circulating flush toilet system 1, FIG. 2 is a configuration diagram of the circulating flush toilet system 1, and FIG. 3 is a configuration diagram illustrating configurations of the ozone decoloring unit 8 and the controller 10. FIG. 4 is an explanatory diagram showing the flow of processing in the ozone decoloring unit 8 (filtrated water supply to the first reaction tank 31), and FIG. 5 is an explanatory diagram showing the processing flow in the ozone decoloring unit 8 (first FIG. 6 is an explanatory diagram showing the flow of processing in the ozone decoloring unit 8 (decolored water from the first reaction tank 31 to the storage tank 9). FIG. 7 is an explanatory diagram showing the flow of processing in the ozone decoloring section 8 (decoloring processing of the second reaction tank 32: supplying filtered water to the first reaction tank 31), and FIG. Explanatory drawing which shows the flow of the process in the part 8 (the second reaction tank 32 or FIG. 9 is a flowchart (first embodiment) showing the control operation of the first reaction tank decoloring process by the CPU 10a, and FIG. 10 is the second reaction tank decolorization by the CPU 10a. It is a flowchart (1st Embodiment) which shows the control operation | movement of a process.

  In addition, the circulation type flush toilet system 1 of 1st Embodiment is provided with the ozone decoloring part 8 which deozones filtrate water. The ozone decoloring unit 8 is mainly composed of two reaction tanks (first reaction tank 31 and second reaction tank 32), a mixing pump 12, circulation pipes 41 to 47, and an ozone generator 13. . Then, by controlling the electromagnetic valves 52 to 54 respectively provided in the circulation pipes 41 to 47, the filtrate water circulation path constituted by the circulation pipes 41 to 47 is changed into the first circulation path and the second circulation. It is characterized in that it can be switched to a flow path.

  First, the overall configuration of the circulating flush toilet system 1 will be schematically described. As shown in FIG. 1, a circulating flush toilet system 1 includes a flush toilet 5 and a biological treatment tank 6 that receives sewage from the flush urinal 5, decomposes organic matter contained in the sewage, and performs nitrification and denitrification. And by mixing ozone into the filtration tank 7 for solid-liquid separation (filtration) of the biological treatment water treated with the biological treatment tank 6 and mixed with sludge, and circulating decolorization by mixing ozone with the filtered water filtered in the filtration tank 7 The ozone decoloring unit 8 that performs the above and a storage tank 9 that stores the decolorized water circulated and decolored by the ozone decoloring unit 8 are mainly configured. A washing water supply pipe 15 is provided between the storage tank 9 and the flush toilet 5, and a pump 16 is provided in the washing water supply pipe 15. By operating the pump 16, the decolorized water stored in the storage tank 9 is supplied to the flush toilet 5 through the cleaning water supply pipe 15 and reused as cleaning water. Furthermore, the circulating flush toilet system 1 includes a controller 10 (see FIG. 2) that controls the processing operation in each processing tank.

  Next, the biological treatment tank 6 will be described. As shown in FIG. 2, the biological treatment tank 6 nitrifies ammonia in sewage and converts it into nitric acid, and the nitric acid nitrified in the nitrification tank 6b is denitrified and converted into nitrogen gas. It comprises a denitrification tank 6a that converts and discharges it into the atmosphere. In addition, the wall (not shown) for a biological treatment water to move is provided in the wall which partitions between the nitrification tank 6b and the denitrification tank 6a. Further, an air diffuser 19 is installed at the bottom of the nitrification tank 6b, and the air diffuser 19 is connected to an intermittent blower 18 through a pipe 18a. Furthermore, the nitrification tank 6b is provided with an underwater pump (not shown), and the biologically treated water in the nitrification tank 6b is supplied to the filtration tank 7 by the operation of the submersible pump.

  Next, the filtration tank 7 will be described. As shown in FIG. 2, a filtration device 17 that supports a plurality of filtration membranes inside a support frame (not shown) is disposed in the filtration tank 7. This filtration device 17 can filter biologically treated water in which sludge is mixed. A filtered water supply pipe 25 is connected to the outlet of the filtered device 17 through which filtrate water flows out, and one end on the downstream side of the filtered water supply pipe 25 is connected to an inlet of an electromagnetic valve 51 described later of the ozone decoloring section 8. Has been. The water surface of the filtration tank 7 is higher than the water surfaces of the first reaction tank 31 and the second reaction tank 32 of the ozone decoloring unit 8. Thereby, the biologically treated water supplied to the filtration tank 7 passes through the plurality of filtration membranes of the filtration device 17 and naturally flows into the ozone decoloring section 8 through the filtrate water supply pipe 25.

  In addition, a diffuser pipe 20 is installed at the bottom of the filtration tank 7, and the diffuser pipe 20 is connected to the intermittent blower 18 via a pipe 18b. Therefore, foreign matters such as sludge adhering to the surface of the filtration membrane of the filtration device 17 disposed above the diffuser tube 20 are removed by the bubbles sent from the diffuser tube 20. Furthermore, since the biologically treated water containing sludge is stored in the filtration tank 7 and aerated by the air diffuser 20, the nitrification reaction by microorganisms is also performed in the filtration tank 7.

  Next, the ozone decoloring part 8 which is a feature of the present invention will be described. As shown in FIG. 2, the ozone decoloring unit 8 reacts by mixing ozone into the first reaction tank 31 and the second reaction tank 32 and the filtered water in the first reaction tank 31 or the second reaction tank 32. The mixing pump 12, the circulation pipes 41 to 47 for circulating the ozone mixed water between the mixing pump 12 and the first reaction tank 31 or the second reaction tank 32, and the ozone as a raw material to generate and mix An ozone generator 13 supplied to the pump 12 is mainly used.

  First, the 1st reaction tank 31 and the 2nd reaction tank 32 are demonstrated. As shown in FIG. 3, the first reaction tank 31 and the second reaction tank 32 receive the filtered water supplied from the filtered water supply pipe 25 and circulate between the mixing pump 12 and generate decolorized water that is generated. It is a storage tank. A float mounting plate 35 extending from the upper side to the lower side of the first reaction tank 31 is disposed inside the first reaction tank 31. A first upper limit float 70 for detecting whether or not the water level of the first reaction tank 31 has reached the upper limit water level is fixed to the upper part of the float mounting plate 35, and the water level of the first reaction tank 31 is fixed to the lower part. A first lower limit float 71 for detecting whether or not it is lower than the lower limit water level is fixed. The fixed position of the first upper limit float 70 is adjusted to the position of the upper limit water level of filtered water (or decolored water) in the first reaction tank 31, and the fixed position of the first lower limit float 71 is adjusted to the first reaction tank 31. The lower limit water level of filtered water (or decolorized water) is adjusted.

  On the other hand, a float mounting plate 36 extending from the upper part to the lower part of the second reaction tank 32 is also arranged inside the second reaction tank 32. A second upper limit float 73 for detecting whether or not the water level of the second reaction tank 32 has reached the upper limit water level is fixed to the upper part of the float mounting plate 36, and the water level of the second reaction tank 32 is fixed to the lower part. A second lower limit float 74 for detecting whether or not it is lower than the lower limit water level is fixed. The fixing position of the second upper limit float 73 is adjusted to the position of the upper limit water level of filtered water (or decolored water) in the second reaction tank 32, and the fixing position of the second lower limit float 74 is adjusted to the second reaction tank 32. It is adjusted to the position of the lower limit water level of the filtered water (or decolorized water) inside.

  These various floats are general float switches, and the switches are turned on and off depending on the water levels in the first reaction tank 31 and the second reaction tank 32. The first upper limit float 70, the first lower limit float 71, the second upper limit float 73, and the second lower limit float 74 are connected to an I / O interface 10d (to be described later) of the controller 10 and are turned on / off output from various floats. Each signal is input. Thereby, CPU10a mentioned later of the controller 10 can detect each water level of the 1st reaction tank 31 and the 2nd reaction tank 32. FIG.

  Next, the piping configuration for supplying filtered water to the first reaction tank 31 and the second reaction tank 32 will be described. As shown in FIG. 3, one end of filtrate water pipe 38 into which filtrate flows in is connected to the upper stage of the side wall of first reaction tank 31, and filtered water is fed to the upper stage of the side wall of second reaction tank 32. One end of the inflowing filtrate pipe 39 is connected. And between each other end of this filtrate water piping 38 and the other end of filtrate water piping 39, each outlet of electromagnetic valve 51 which is a three-way electromagnetic valve provided with one inlet and two outlets is connected. Has been. Two valve seats are provided in the valve of the electromagnetic valve 51, and one of the valve seats is always opened and the other valve seat is closed. Thereby, the two flow paths can be switched to each other in the valve of the electromagnetic valve 51. The downstream end of the filtrate water supply pipe 25 is connected to the inlet of the electromagnetic valve 51. Therefore, the filtrate supplied from the filtrate supply pipe 25 flows from the solenoid valve 51 to the filtrate water pipe 38 or to the filtrate water pipe 39, and is thus supplied to the first reaction tank 31 or the second reaction tank 32, respectively. Can do.

  Next, the mixing pump 12 will be described. This mixing pump 12 is a well-known gas-liquid mixing pump. The mixing pump 12 includes a pump body, an ozone inlet through which ozone flows in, a filtered water inlet through which filtered water flows in, and a mixed water outlet through which ozone mixed water flows out. Therefore, the filtered water flowing in from the filtered water inlet is mixed with the ozone flowing in from the ozone inlet in the pump body, and can be discharged to the outside from the mixed water outlet as ozone mixed water.

  Next, the piping configuration of the circulation piping 41 to 47 will be described. As shown in FIG. 3, one end of the circulation pipe 41 is connected to the middle stage of the side wall of the first reaction tank 31, and one end of the circulation pipe 42 is connected to the middle stage of the side wall of the second reaction tank 32. ing. And each outlet of the solenoid valve 52 which is a three-way solenoid valve provided with one inlet and two outlets is connected between the other end of the circulation pipe 41 and the other end of the circulation pipe 42. . On the other hand, one end of the circulation pipe 43 is connected to the lower stage of the side wall of the first reaction tank 31, and one end of the circulation pipe 44 is connected to the lower stage of the side wall of the second reaction tank 32. And between the other end part of the circulation piping 44 and the other end part of the circulation piping 43, each inlet of the solenoid valve 53 which is a three-way solenoid valve provided with two inlets and one outlet is connected. .

  One end of the circulation pipe 45 is connected to the mixed water outlet of the mixing pump 12. Further, the other end of the circulation pipe 45 is connected to an inlet of an electromagnetic valve 54 that is a three-way electromagnetic valve having one inlet and two outlets. Further, a circulation pipe 46 is connected between one outlet of the electromagnetic valve 54 and the inlet of the electromagnetic valve 52. A circulation pipe 47 is connected between the outlet of the electromagnetic valve 53 and the filtered water inlet of the mixing pump 12. Further, one end of the decolorized water supply pipe 50 is connected to the other outlet of the electromagnetic valve 54, and the other end is connected to the storage tank 9. The circulation pipe 46 is provided with a manual valve 61 that manually opens and closes the flow path, and the decolorized water supply pipe 50 is also provided with a manual valve 62 that manually opens and closes the flow path. These manual valves 61 and 62 are always in a half-open state, and by keeping the water pressure in the circulation pipe 46 and the decolorized water supply pipe 50 high, more ozone is dissolved and the decolorization reaction is promoted. The first circulation passage that connects the first reaction tank 31 and the mixing pump 12, the second reaction tank 32, the mixing pump 12, and the circulation pipes 41 to 47 and the solenoid valves 52 to 54 arranged in this way. And a second circulation channel connecting the two. The first circulation channel and the second circulation channel will be described later.

  Next, the controller 10 will be described. As shown in FIG. 3, the controller 10 includes a CPU 10a as a central processing unit, a ROM 10b, a RAM 10c, and a timer 10e connected to each other around the CPU 10a. The RAM 10c is a readable / writable memory that temporarily stores a program being executed and stores various data, and the ROM 10b is a read-only memory that stores various programs built therein. Further, an I / O interface 10d is connected to the CPU 10a. This I / O interface 10d is connected to electromagnetic valves 51, 52, 53, 54, a blower 18, a mixing pump 12, an ozone generator 13, a first upper limit float 70, via wires not shown. A first lower limit float 71, a second upper limit float 73, and a second lower limit float 74 are connected to each other.

  Next, the first circulation channel and the second circulation channel of the ozone decoloring unit 8 will be described. As described above, in the ozone decoloring unit 8, the first reaction tank 31 and the mixing pump 12 are connected by controlling the electromagnetic valves 52 to 54 provided in the circulation pipes 41 to 47. The first circulating flow path for mixing and circulating ozone in the filtered water in 31, the second reaction tank 32 and the mixing pump 12 are connected, and the filtered water in the second reaction tank 32 is mixed with ozone. It can switch to the 2nd circulation flow path made to circulate, respectively.

  As shown in FIG. 5, the first circulation channel is configured in the order of the first reaction tank 31 to the circulation pipe 43, the circulation pipe 47, the mixing pump 12, the circulation pipe 45, the circulation pipe 46, and the circulation pipe 41. Loop-shaped flow path. On the other hand, as shown in FIG. 7, the second circulation flow path is configured from the second reaction tank 32 to the circulation pipe 44, the circulation pipe 47, the mixing pump 12, the circulation pipe 45, the circulation pipe 46, and the circulation pipe 42. It is a loop-shaped flow path. Then, by alternately switching between the first circulation channel and the second circulation channel, the circulation decoloration of the filtrate in the first reaction tank 31 and the circulation decoloration of the filtrate in the second reaction tank 32 are alternately performed. Can be done. Moreover, since the 1st circulation channel and the 2nd circulation channel share the circulation piping 45, 46, 47 among the circulation piping 41-47, two circulation channels can be formed with few piping structures. Thereby, since the structure of the ozone decoloring part 8 can be put together compactly, it becomes possible to install even in a small installation space.

  Next, the decolorized water supply flow path of the ozone decoloring unit 8 will be described. As shown in FIG. 3, the ozone decoloring unit 8 stores the decolorized water stored in the first reaction tank 31 or the second reaction tank 32 through the decolorized water supply pipe 50 by controlling the electromagnetic valve 54. It can switch to the decolored water supply flow path which can be supplied to the tank 9. FIG. As shown in FIG. 6 or FIG. 8, the decolorized water supply flow path is a flow path configured in the order of the mixing pump 12, the circulation pipe 45, the mixing pump 12, and the decolorized water supply pipe 50. Therefore, the decolorized water stored in the first reaction tank 31 flows into the decolorized water supply pipe 50 through the circulation pipe 43, the circulation pipe 47, and the mixing pump 12, as shown in FIG. The On the other hand, the decolorized water stored in the second reaction tank 32 flows into the decolorized water supply pipe 50 via the circulation pipe 44, the circulation pipe 47, and the mixing pump 12, as shown in FIG. The

  Next, the set time t1 for operating the ozone generator 13 will be described. As shown in FIG. 3, the ozone generated by the ozone generator 13 is supplied to the mixing pump 12 via the ozone supply pipe 27. The ozone supply amount is adjusted by the operation time of the ozone generator 13. Therefore, in the present embodiment, the operation time of the ozone generator 13 is set so that the filtered water stored in each reaction tank is the target color in the decolorization processing of each reaction tank (the first reaction tank 31 or the second reaction tank 32). It is set as the time (set time t1) required for decoloring to the extent.

  For example, as shown in FIG. 5 (FIG. 7), the filtered water of the first reaction tank 31 (or the second reaction tank 32) is circulated through the first circulation channel (or the second circulation channel), and ozone is added. When the generator 13 is operated, if the ozone generator 13 is stopped after the set time t1 has elapsed after the ozone generator 13 is operated, the first reaction tank 31 (or the second reaction tank 32) is stopped. Can obtain decolorized water decolorized to the target chromaticity.

  Next, the control operation of the CPU 10a in the ozone decoloring unit 8 will be described with reference to the flowcharts shown in FIGS. 9 and 10 and the explanatory views of the flow of treated water shown in FIGS. In this description, it is assumed that filtered water is not yet supplied to the first reaction tank 31 and the second reaction tank 32 at the start of processing. First, when the activation switch (not shown) of the circulating flush toilet system 1 is turned on, a first reaction tank decoloring process (see FIG. 9) that performs ozone circulation decolorization of the filtered water in the first reaction tank 31; The 2nd reaction tank decoloring process (refer FIG. 10) which performs ozone circulation decoloration of the filtered water of the reaction tank 32 is performed simultaneously.

  However, in the first reaction tank decoloring process and the second reaction tank decoloring process, the circulation pipes 45, 46, and 47 shared with each other cannot be used at the same time. Therefore, the first reaction tank decoloring process is advanced before the second reaction tank decoloring process. Therefore, in the 2nd reaction tank decoloring process shown in FIG. 10, first, in the 1st reaction tank decoloring process mentioned later, the 2nd reaction tank process start signal for permitting the process start of the 2nd reaction tank 32 (FIG. 9 :). It is determined whether or not (see S14) is output (S31). Until the second reaction tank treatment start signal is output (S31: NO), the process does not proceed, and until the second reaction tank treatment start signal is output, the process returns to S31 and enters a standby state.

  On the other hand, in the first reaction tank decoloring process, as shown in FIG. 9, it is first determined whether or not the first reaction tank 31 is less than the upper limit water level (S11). Here, when the filtrate water level in the first reaction tank 31 is less than the upper limit water level (S11: YES), the valve seat on the filtrate water pipe 38 side in the electromagnetic valve 51 is opened, and the valve seat on the filtrate water pipe 39 side is opened. Closed. Then, as shown in FIG. 4, the filtrate flowing through the filtrate water supply pipe 25 flows into the filtrate water pipe 38 from the electromagnetic valve 51 and is supplied into the first reaction tank 31 (S12). On the other hand, when the 1st reaction tank 31 is more than an upper limit water level (S11: NO), since it is not necessary to supply filtered water to the 1st reaction tank 31, the start of the process of the 2nd reaction tank 32 is permitted. A reaction tank processing start signal is output (S14).

  Moreover, if filtered water is supplied in the 1st reaction tank 31 (S12), it will be judged next whether the filtered water in the 1st reaction tank 31 is more than an upper limit water level (S13). And when it is judged that the filtered water in the 1st reaction tank 31 is not more than an upper limit water level (S13: NO), it returns to S12 and filtered water is supplied continuously. Furthermore, when filtered water is supplied and the filtered water in the first reaction tank 31 is determined to be equal to or higher than the upper limit water level (S13: YES), there is no need to supply filtered water to the first reaction tank 31, The 2nd reaction tank process start signal which permits the start of the process of 2 reaction tank 32 is output (S14).

  As will be described later, when the second reaction tank treatment start signal is output, in the second reaction tank decolorization process, the valve seat on the filtrate water pipe 39 side in the electromagnetic valve 51 is opened, and the valve on the filtrate water pipe 38 side is opened. The seat is closed. And as shown in FIG. 5, filtered water is supplied to the 2nd reaction tank 32 (FIG. 10: S33).

  Next, it is determined whether or not the second reaction tank 32 is in a circulation decoloring process (S15). Here, when the filtered water in the second reaction tank 32 is in a circulation decolorization process, the circulation pipes 45 and 47 cannot be used. Therefore, when the 2nd reaction tank 32 is performing the circulation decoloring process (S15: YES), it returns to S13 and a process is repeated. Further, when the second reaction tank 32 is not in the process of circulating decolorization (S15: NO), the first circulation channel is opened by switching each of the electromagnetic valves 52, 53, 54 (S16). Specifically, in the solenoid valve 53, the valve seat is opened so as to connect the flow path from the circulation pipe 43 to the circulation pipe 47, and in the solenoid valve 54, the flow path is connected from the circulation pipe 45 to the circulation pipe 46. The valve seat is opened, and the solenoid valve 52 is opened so as to connect the flow path from the circulation pipe 46 to the circulation pipe 41. As a result, the first circulation channel is opened. Further, the ozone generator 13 is operated (S17), and the mixing pump 12 is operated (S18). Then, the timer counter k is reset and started (S19). Then, as shown in FIG. 5, the filtered water in the first reaction tank 31 reacts with ozone by circulating through the first circulation channel, and decolorization proceeds.

  Thereafter, it is determined whether or not the operation time of the ozone generator 13, that is, the value of the timer counter k has reached the set time t1 (S20). Here, when the value of the timer counter k has not yet reached the set time t1 (S20: NO), it can be estimated that the filtered water in the first reaction tank 31 has not been decolorized to the target chromaticity. Therefore, the process returns to S20, the ozone generator 13 is operated as it is, the circulation decoloring process is continued, and the value of the timer counter k is monitored. When the value of the timer counter k reaches the set time t1 (S20: YES), the ozone generator 13 is stopped (S21). At this time, decolorized water having a target chromaticity is generated in the first reaction tank 31.

  Next, in order to supply the decolorized water in the first reaction tank 31 to the storage tank 9, the electromagnetic valve 54 is switched and the decolorized water supply flow path is opened (S22). Specifically, in the electromagnetic valve 54, the valve seat is opened so as to connect the flow path from the circulation pipe 45 to the decolorized water supply pipe 50. Accordingly, as shown in FIG. 6, the decolorized water in the first reaction tank 31 flows through the circulation pipe 43, the circulation pipe 47, the mixing pump 12, the circulation pipe 45, and the decolorized water supply pipe 50 and is supplied to the storage tank 9. The decolorized water in the first reaction tank 31 is gradually reduced.

  Further, it is determined whether or not the level of decolorized water in the first reaction tank 31 is less than the lower limit water level (S23). Here, when the water level is still higher than the lower limit water level (S23: NO), the process returns to S23, the decolorized water is continuously supplied to the storage tank 9, and the water level is monitored. And when a water level falls to less than a minimum water level (S23: YES), since the decolorizing water only to supply to the storage tank 9 no longer exists in the 1st reaction tank 31, the mixing pump 12 is stopped ( S24). Subsequently, the solenoid valve 54 is switched to close the decolorized water supply channel (S25). Further, in the second reaction tank decoloring process to be described later, it is determined whether or not a first reaction tank process start signal (see FIG. 10: S35) is output (S26). While this first reaction tank processing start signal is not output (S26: NO), it can be estimated that filtered water is being supplied to the second reaction tank 32, so the process returns to S26 and enters a standby state. And when the filtered water supply to the 2nd reaction tank 32 is complete | finished and a 1st reaction tank process start signal is output in a 2nd reaction tank decoloring process (S26: YES), it returns to S11 and repeats a process.

  Next, the second reaction tank decoloring process will be described. As described above, the second reaction tank decoloring process is performed simultaneously with the first reaction tank decoloring process. In this second reaction tank decoloring process, as shown in FIG. 10, it is first determined whether or not there is a second reaction tank process start signal (S31). In the first reaction tank decoloring process, if the second reaction tank process start signal is not output (S31: NO), it can be assumed that filtered water is supplied to the first reaction tank 31, and the process returns to S31. To enter a standby state. And when there exists a 2nd reaction tank process start signal (S31: YES), since the filtered water supply to the 1st reaction tank 31 is complete | finished, the water level of the 2nd reaction tank 32 continues. It is determined whether or not the water level is lower than the upper limit water level (S32). Here, when it is less than the upper limit water level (S32: YES), the valve seat on the filtrate water piping 39 side of the solenoid valve 51 is opened, and the valve seat on the filtrate water piping 38 side is closed. Then, as shown in FIG. 5, the filtrate supplied from the filtrate supply pipe 25 flows into the filtrate water pipe 39 from the electromagnetic valve 51 and is supplied into the second reaction tank 32 (S33). And when the 2nd reaction tank 32 is more than an upper limit water level (S32: NO), it is not necessary to supply filtered water to the 2nd reaction tank 32. FIG. Therefore, the first reaction tank process start signal that permits the start of the process in the first reaction tank 31 is output (S35). Thereby, the process from S11 shown in FIG. 9 is performed by recognizing this first reaction tank process start signal in the first reaction tank decoloring process (S26: YES shown in FIG. 9).

  Moreover, if filtered water is supplied in the 2nd reaction tank 32 (S33), it will be judged next whether the filtered water in the 2nd reaction tank 32 is more than an upper limit water level (S34). And when it is judged that the filtered water in the 2nd reaction tank 32 is not more than an upper limit water level (S34: NO), it returns to S33 and filtered water is supplied continuously. Furthermore, when filtered water is supplied and the filtered water in the second reaction tank 32 is determined to be equal to or higher than the upper limit water level (S34: YES), there is no need to supply filtered water to the second reaction tank 32. A first reaction tank process start signal that permits the start of the process in one reaction tank 31 is output (S35).

  Next, it is determined whether or not the first reaction tank 31 is being decolorized (S36). Here, when the filtered water in the first reaction tank 31 is being decolorized, the circulation pipes 45, 46, and 47 cannot be used. Therefore, when the 1st reaction tank 31 is in the process of circulation decoloring (S36: YES), it returns to S34 and a process is repeated. Further, when the first reaction tank 31 is not in the circulation decoloring process (S36: NO), the second circulation channel is opened by switching each of the electromagnetic valves 52, 53, and 54 (S37). Specifically, in the solenoid valve 53, the valve seat is opened so as to connect the flow path from the circulation pipe 44 to the circulation pipe 47, and in the electromagnetic valve 54, the flow path is connected from the circulation pipe 45 to the circulation pipe 46. The valve seat is opened, and the solenoid valve 52 is opened so as to connect the flow path from the circulation pipe 46 to the circulation pipe 42. As a result, the second circulation channel is opened. Further, the ozone generator 13 is operated (S38), and the mixing pump 12 is operated (S39). Then, the timer counter k is reset and started (S40). In this way, as shown in FIG. 7, the filtered water in the second reaction tank 32 reacts with ozone by circulating through the second circulation channel, and decolorization proceeds.

  Thereafter, it is determined whether or not the operating time of the ozone generator 13, that is, the value of the timer counter k has reached the set time t1 (S41). Here, when the value of the timer counter k has not yet reached the set time t1 (S41: NO), it can be estimated that the filtered water in the second reaction tank 32 has not been decolorized to the target chromaticity. Therefore, returning to S41, the ozone generator 13 is operated as it is, the circulation decoloring process is continued, and the value of the timer counter k is monitored. When the value of the timer counter k reaches the set time t1 (S41: YES), the ozone generator 13 is stopped (S42). At this time, decolorized water having a target chromaticity is generated in the second reaction tank 32.

  Next, in order to supply the decolorized water in the second reaction tank 32 to the storage tank 9, the electromagnetic valve 54 is switched and the decolorized water supply flow path is opened (S43). Specifically, in the electromagnetic valve 54, the valve seat is opened so as to connect the flow path from the circulation pipe 45 to the decolorized water supply pipe 50. As a result, as shown in FIG. 8, the decolorized water in the second reaction tank 32 flows through the circulation pipe 44, the circulation pipe 47, the mixing pump 12, the circulation pipe 45, and the decolorized water supply pipe 50 and is supplied to the storage tank 9. Is done. Therefore, the water level of decolorized water in the second reaction tank 32 gradually decreases.

  Further, it is determined whether or not the water level of the decolorized water in the second reaction tank 32 is less than the lower limit water level (S44). If the water level is still higher than the lower limit water level (S44: NO), the process returns to S44, the decolorized water is continuously supplied to the storage tank 9, and the water level is monitored. And when a water level falls to less than a minimum water level (S44: YES), since the decolorizing water only to supply to the storage tank 9 does not exist in the 2nd reaction tank 32, the mixing pump 12 is stopped (S45). ). Subsequently, the solenoid valve 54 is switched to close the decolorized water supply channel (S46). Then, it returns to S31 and a process is repeated.

  As described above, the circulating flush toilet system 1 according to the first embodiment includes the ozone decoloring unit 8. The ozone decoloring unit 8 includes two reaction tanks (a first reaction tank 31 and a second reaction tank 32), a mixing pump 12, circulation pipes 41 to 47, and an ozone generator 13. And the ozone decoloring part 8 accumulates filtered water in two reaction tanks (the 1st reaction tank 31 and the 2nd reaction tank 32), respectively, respectively, and performs the decoloring process by ozone, respectively. Thereby, since ozone can be made to act on filtered water reliably, the contact efficiency of ozone and filtered water can be improved. Furthermore, since the decolorized water generated in each treatment tank is not supplied with fresh filtered water and mixed, decolorized water with stable chromaticity can be obtained in a short time.

  Moreover, in the ozone decoloring part 8, the flow path of the circulation piping 41-47 is made into the 1st circulation flow path and the 2nd circulation flow path by controlling the solenoid valves 52-54 provided in the circulation piping 41-47. It can be switched to either. And since the circulating decoloration of the filtered water of the 1st reaction tank 31 and the circulating decoloring of the filtered water of the 2nd reaction tank 32 are performed alternately, filtered water can be decolored efficiently in a short time. For example, the filtered water can be supplied to the second reaction tank 32 while the filtered water in the first reaction tank 31 is being decolorized. Furthermore, the filtered water can be supplied to the first reaction tank 31 while the filtered water in the second reaction tank 32 is being decolorized. Thereby, filtered water can be efficiently decolored in a short time. Moreover, since some piping is mutually shared among the circulation piping 41-47, the ozone decoloring part 8 can be put together compactly. In addition, since one mixing pump 12 is shared by the first circulation channel and the second circulation channel, the configuration of the ozone decoloring unit 8 can be further compacted.

  Further, the operation time of the ozone generator 13 is such that the filtered water stored in the first reaction tank 31 or the second reaction tank 32 is set to the target chromaticity in each decolorization process of the first reaction tank 31 and the second reaction tank 32. Is set to the time required for decoloring, that is, the set time t1. Thereby, when the set time t1 has elapsed since the ozone generator 13 started operation, the ozone generator 13 is stopped, so that decolorized water having the target chromaticity is contained in the first reaction tank 31 or the second reaction tank 32. Can be obtained.

  Next, the circulation type flush toilet system which is 2nd Embodiment is demonstrated. FIG. 11 is a flowchart (second embodiment) showing the control operation of the first reaction tank decoloring process by the CPU 10a, and FIG. 12 is a flowchart (second example) showing the control operation of the second reaction tank decoloring process by the CPU 10a. Embodiment).

  This circulating flush toilet system has the same configuration as the circulating flush toilet system 1 according to the first embodiment, but the control operation of the CPU 10a is different. That is, before the filtered water stored in each reaction tank (the first reaction tank 31 and the second reaction tank 32) is decolored to the target chromaticity, the decolorized water supply flow path is opened, By further reacting with ozone, the time required for the ozone decoloring treatment can be further shortened. Therefore, here, the description of the structure of the circulating flush toilet system according to the second embodiment will be omitted, and the control operation of the CPU 10a different from the first embodiment will be mainly described.

  First, the timing for opening the decolorized water supply channel will be described. As described above, opening and closing of the decolorized water supply flow path is performed by controlling switching of the electromagnetic valve 54. In the second embodiment, the timing for opening the decolorized water supply flow path by the electromagnetic valve 54 is set after a set time t2 after the ozone generator 13 starts operation. Further, the set time t2 is set as a time required for the filtered water in each reaction tank to be decolored to a reference chromaticity higher than the target chromaticity (hereinafter referred to as decolorized water reference chromaticity). That is, the filtrated water is decolored to the decolorized water reference chromaticity after the set time t2 has elapsed since the ozone generator 13 started operation. Further, since the decolorized water supply flow path is opened while the ozone generator 13 is kept in operation, ozone is further mixed by the mixing pump 12 and an ozone decolorization reaction occurs in the tube of the decolorized water supply pipe 50. Therefore, the decolorized water having the target chromaticity is supplied to the storage tank 9 when passing through the outlet of the decolorized water supply pipe 50. The decolorized water reference chromaticity is set so that the chromaticity of the decolorized water when passing through the outlet of the decolorized water supply pipe 50 is decolored to the target chromaticity. For example, when the target chromaticity is set to 30 degrees, based on the ability of the ozone generator 13, the diameter and length of the decolorized water supply pipe 50, the delivery capacity of the mixing pump 12, etc., the decolorized water reference chromaticity (for example, 100 degrees) is set.

  Next, the control operation of the CPU 10a in the second embodiment will be described with reference to the flowcharts shown in FIGS. It is assumed that filtered water is not yet supplied to the first reaction tank 31 and the second reaction tank 32 at the start of processing in this description. First, when the activation switch (not shown) of the circulating flush toilet system is turned on, the first reaction tank decoloring process (see FIG. 11) and the second reaction tank decoloring process (see FIG. 12) are performed simultaneously. . And like 1st Embodiment, a 1st reaction tank decoloring process is advanced before a 2nd reaction tank decoloring process. Therefore, in the second reaction tank decoloring process shown in FIG. 12, first, in the first reaction tank decoloring process, was a second reaction tank process start signal (described later) for permitting the start of the process in the second reaction tank 32 output? It is determined whether or not (S71). Then, the process does not proceed until the second reaction tank treatment start signal is output (S71: NO), and the standby state is maintained until the second reaction tank treatment start signal is output (S71).

  First, the 1st reaction tank decoloring process is demonstrated. As shown in FIG. 11, first, it is determined whether or not the first reaction tank 31 is less than the upper limit water level (S51). Here, when it is already determined that the first reaction tank 31 is equal to or higher than the upper limit water level (S51: NO), a second reaction tank process start signal that permits the start of the process of the second reaction tank 32 is output. (S54). Moreover, when the water level of the filtrate of the 1st reaction tank 31 is less than an upper limit water level (S51: YES), the valve seat by the side of the filtrate water piping 38 in the solenoid valve 51 is opened, and filtrate water enters the 1st reaction tank 31. Is supplied (S52). On the other hand, when the 1st reaction tank 31 is more than an upper limit water level (S51: NO), the 2nd reaction tank process start signal which permits the start of the process of the 2nd reaction tank 32 is output (S54).

  Moreover, if filtered water is supplied in the 1st reaction tank 31 (S52), it will be judged next whether the filtered water in the 1st reaction tank 31 is more than an upper limit water level (S53). And when it is judged that the filtered water in the 1st reaction tank 31 is not more than an upper limit water level (S53: NO), it returns to S52 and filtered water is supplied continuously. Furthermore, when filtrate water is supplied and the filtrate water in the 1st reaction tank 31 is judged to be more than an upper limit water level (S53: YES), since it is not necessary to supply filtrate water to the 1st reaction tank 31, 1st The 2nd reaction tank process start signal which permits the start of the process of the 2 reaction tank 32 is output (S54).

  Next, it is determined whether or not the second reaction tank 32 is in a circulation decoloring process (S55). Here, when the filtered water in the second reaction tank 32 is being circulated and decolored (S55: YES), the circulation pipes 45, 46, and 47 cannot be used, so the process returns to S53 to be in a standby state. Further, when the second reaction tank 32 is not in the process of circulating decolorization (S55: NO), the solenoid valves 52, 53, 54 are switched, and the first circulation channel is opened (S56). Further, the ozone generator 13 is operated (S57), and the mixing pump 12 is operated (S58). Then, the timer counter k is reset and started (S59). Then, the filtered water in the first reaction tank 31 circulates through the first circulation flow path, thereby reacting with ozone and proceeding with decolorization.

  Thereafter, it is determined whether or not the timer counter k of the ozone generator 13 has reached the set time t2 (S60). Here, when the value of the timer counter k has not yet reached the set time t2 (S60: NO), the filtered water in the first reaction tank 31 is decolored to the decolorized water reference chromaticity (for example, 100 degrees). I can guess that it is not. Therefore, the process returns to S60 and the cyclic decoloring process is continued as it is. When the timer counter k reaches the set time t2 (S60: YES), it can be assumed that the filtered water in the first reaction tank 31 has been decolored to the decolorized water reference chromaticity, so the ozone generator 13 is stopped. Without, the solenoid valve 54 is switched and the decolorized water supply flow path is opened (S61).

  As a result, the decolorized water in the first reaction tank 31 passes through the circulation pipe 43 and the circulation pipe 47 and is sucked into the mixing pump 12 as shown in FIG. 6, and ozone is further mixed in the mixing pump 12. The The mixed water mixed with ozone flows into the decolorized water supply pipe 50 via the circulation pipe 45 and is further decolorized while passing through the decolorized water supply pipe 50. Therefore, when passing through the outlet of the decolorized water supply pipe 50, the decolorized water is decolorized to the target chromaticity (for example, 30 degrees), so that the decolorized water having the target chromaticity can be supplied to the storage tank 9.

  Next, it is determined whether or not the water surface of the decolorized water in the first reaction tank 31 is less than the lower limit water level (S62). Here, when the water level is equal to or higher than the lower limit water level (S62: NO), the process returns to S62, the decolorized water is continuously supplied to the storage tank 9, and the water level is monitored. And when a water level falls below a minimum water level (S62: YES), the ozone generator 13 is stopped (S63) and the mixing pump 12 is stopped (S64). Subsequently, the electromagnetic valve 54 is switched, and the decolorized water supply flow path is closed (S65). Furthermore, in the second reaction tank start process described later, it is determined whether or not a first reaction tank process start signal is output (S66). While the first reaction tank treatment start signal is not output (S66: NO), the filtered water is supplied to the second reaction tank 32, so that the process returns to S66 and is in a standby state. And when supply of the filtered water to the 2nd reaction tank 32 is complete | finished and a 1st reaction tank process start signal is output (S66: YES), it returns to S51 and a process is repeated.

  Next, the second reaction tank decoloring process will be described. First, it is determined whether or not there is a second reaction tank processing start signal (S71). If there is no second reaction tank processing start signal yet (S71: NO), the process returns to S71 and enters a standby state. And when there exists a 2nd reaction tank process start signal (S71: YES), it is judged whether the water level of the filtrate of the 2nd reaction tank 32 is less than an upper limit water level (S72). Here, when the 2nd reaction tank 32 is more than an upper limit water level (S72: NO), since it is not necessary to supply filtered water to the 2nd reaction tank 32, the start of the process of the 2nd reaction tank 32 is permitted. A one-reactor process start signal is output (S75). Moreover, when it is less than an upper limit water level (S72: YES), the valve seat by the side of the filtrate water piping 39 of the solenoid valve 51 is opened, and filtrate water is supplied in the 2nd reaction tank 32 (S73). Next, it is determined whether or not the water level in the second reaction tank 32 is equal to or higher than the upper limit water level (S74). And when it is not judged that a water level is more than an upper limit water level (S74: NO), it returns to S73 and monitoring of a water level is performed continuously. Further, when it is determined that the water level is equal to or higher than the upper limit water level (S74: YES), a first reaction tank process start signal that permits the start of the process of the second reaction tank 32 is output (S75). Thereby, in the 1st reaction tank decoloring process, the 1st reaction tank process start signal outputted by the 2nd reaction tank decoloring process is recognized (S66: YES shown in Drawing 11), and the 1st reaction tank decoloring process The process from S51 is executed again.

  Next, it is determined whether or not the first reaction tank 31 is in a circulation decoloring process (S76). And when the 1st reaction tank 31 is in the circulation decoloring process (S76: YES), since the 2nd reaction tank 32 cannot be circulated and decolored, it returns to S74 and will be in a standby state. Further, when the first reaction tank 31 is not in the circulation decoloring process (S76: NO), the second circulation flow path is opened by switching the electromagnetic valves 52, 53, 54 (S77). Further, the ozone generator 13 is operated (S78), and the mixing pump 12 is operated (S79). Then, the timer counter k is reset and started (S80). Then, the filtered water in the second reaction tank 32 circulates in the second circulation flow path, thereby reacting with ozone and proceeding with decolorization.

  Thereafter, it is determined whether the operation time of the ozone generator 13, that is, whether the timer counter k has reached the set time t2 (S81). Here, when the value of the timer counter k has not yet reached the set time t2 (S81: NO), the process returns to S81 as in the first reaction tank decoloring process, and the circulation decoloring process is continued, and the timer The value of counter k is monitored. When the value of the timer counter k reaches the set time t2 (S81: YES), the solenoid valve 54 is switched without stopping the ozone generator 13 (S82). Then, the decolorized water supply flow path constituted by the circulation pipe 45 and the decolorized water supply pipe 50 is opened.

  As a result, as shown in FIG. 8, the decolorized water in the second reaction tank 32 passes through the circulation pipe 44 and the circulation pipe 47 and is sucked into the mixing pump 12, and ozone is further mixed in the mixing pump 12. The The mixed water mixed with ozone flows into the decolorized water supply pipe 50 via the circulation pipe 45 and is further decolorized while passing through the decolorized water supply pipe 50. Therefore, since the decolorized water is decolored to the target chromaticity (for example, 30 degrees) when passing through the outlet of the decolorized water supply pipe 50, the decolorized water having the target chromaticity can be supplied to the storage tank 9.

  Next, it is determined whether the water level in the second reaction tank 32 is less than the lower limit water level (S83). Here, when the water level is still higher than the lower limit water level (S83: NO), the process returns to S83, the decolorized water is continuously supplied to the storage tank 9, and the water level is monitored. And when a water level falls below a minimum water level (S83: YES), the ozone generator 13 is stopped (S84) and the mixing pump 12 is stopped (S85). Subsequently, the electromagnetic valve 54 is switched, and the decolorized water supply flow path is closed (S86). Thereafter, the process returns to S71 and the process is repeated.

  As described above, the circulating flush toilet system of the second embodiment has the same configuration as the circulating flush toilet system 1 of the first embodiment, but the control operation of the CPU 10a is different. That is, before the filtered water stored in each reaction tank is decolored to the target chromaticity, the decolorized water supply flow path can be opened and reacted with ozone in the decolorized water supply pipe 50. Thereby, in 1st Embodiment, since the time used only in order to supply the decoloring water in each reaction tank to the storage tank 9 can be abbreviate | omitted in 2nd Embodiment, the filtration of the ozone decoloring part 8 is carried out. The processing time required for the ozone circulation decoloration of water can be reduced.

  Next, the circulation type flush toilet system which is 3rd Embodiment is demonstrated. FIG. 13 is a block diagram showing the configuration of the ozone decoloring unit 80 and the controller 110, FIG. 14 is a flowchart showing the control operation of the first reaction tank decoloring process by the CPU 110a, and FIG. 15 is the second reaction by the CPU 110a. It is a flowchart which shows the control operation | movement of a tank decoloring process.

  This circulating flush toilet system is a modification of the second embodiment, and the first reaction tank 31 and the second reaction tank 32 can be used to directly detect the chromaticity of decolorized water in each tank, 86 are provided. And based on each detection value of these chromaticity sensors 85 and 86, by controlling the timing which opens a decolored water supply flow path, the chromaticity of the decolorized water supplied to the storage tank 9 is made more accurate and stable. It has a feature in that it can be held.

  Since the circulating flush toilet system of the third embodiment basically includes the structure of the circulating flush toilet system 1 according to the first embodiment, the same structural parts are denoted by the same reference numerals. While omitting the description, only different structural parts will be described.

  As shown in FIG. 13, this circulating flush toilet system includes an ozone decoloring unit 80 and a controller 110. The ozone decoloring unit 80 has the same structure as the ozone decoloring unit 8 of the first embodiment. And in the 1st reaction tank 31, the chromaticity sensor 85 which detects the chromaticity of stored water is attached to the approximate middle stage of the float mounting plate 35. On the other hand, in the second reaction tank 32, a chromaticity sensor 86 is attached to a substantially middle stage of the float attachment plate 36. These chromaticity sensors 85 and 86 are well-known chromaticity sensors. These chromaticity sensors 85 and 86 are electrically connected to an I / O interface 110d of the controller 110 described later. Therefore, the chromaticity values detected by the chromaticity sensors 85 and 86 are converted into detection signals and input to the CPU 110a of the controller 110.

  The controller 110 includes a CPU 110a as a central processing unit, a ROM 110b and a RAM 110c connected to each other around the CPU 110a. Further, the CPU 110a is provided with an I / O interface 110d. The I / O interface 110d is connected to the solenoid valves 51, 52, 53, 54, the blower 18, the mixing pump 12, the ozone generator 13, and the first upper limit float via wiring not shown. 70, a first lower limit float 71, a second upper limit float 73, a second lower limit float 74, and chromaticity sensors 85 and 86 are connected to each other. In the present embodiment, the operation / stop timing of the ozone generator 13 is performed based on the detected chromaticity of the chromaticity sensors 85 and 86. Therefore, the controller 110 is not provided with a timer like the controller 10 of the first embodiment.

  Then, the CPU 110a performs the same control as in the second embodiment. That is, when the filtered water in each reaction tank is decolored to the decolorized water reference chromaticity, the decolorized water supply flow path is opened. As a result, ozone decolorization is further performed within the pipe of the decolorized water supply pipe 50, so that decolorized water having the target chromaticity can be supplied to the storage tank 9. The target chromaticity and the decolorized water reference chromaticity are set in the same manner as in the second embodiment.

  Next, the control operation of the ozone decoloring unit 80 by the CPU 110a will be described with reference to the flowcharts shown in FIGS. It is assumed that filtered water is not yet supplied to the first reaction tank 31 and the second reaction tank 32 at the start of processing in this description. First, when the activation switch (not shown) of the circulating flush toilet system is turned on, the first reaction tank decoloring process (see FIG. 14) and the second reaction tank decoloring process (see FIG. 15) are performed simultaneously. . Then, as in the second embodiment, the first reaction tank decoloring process is advanced before the second reaction tank decoloring process. Therefore, in the second reaction tank decoloring process shown in FIG. 15, first, in the first reaction tank decoloring process, was the second reaction tank process start signal described later for permitting the start of the process of the second reaction tank 32 output? It is determined whether or not (S111). Then, until the second reaction tank processing start signal is output (S111: NO), the process returns to S111 and is in a standby state until the second reaction tank processing start signal is output.

  First, the 1st reaction tank decoloring process is demonstrated. As shown in FIG. 14, first, it is determined whether or not the first reaction tank 31 is less than the upper limit water level (S91). Here, when it is already determined that the first reaction tank 31 is equal to or higher than the upper limit water level (S91: NO), a second reaction tank process start signal for permitting the start of the process of the second reaction tank 32 is output. (S94). Moreover, when the water level of the filtrate of the 1st reaction tank 31 is less than an upper limit water level (S91: YES), the valve seat by the side of the filtrate water piping 38 in the solenoid valve 51 is opened, and filtrate water is in the 1st reaction tank 31. Is supplied (S92).

  Moreover, if filtered water is supplied in the 1st reaction tank 31 (S92), it will be judged next whether the filtered water in the 1st reaction tank 31 is more than an upper limit water level (S93). And when it is judged that the filtered water in the 1st reaction tank 31 is not more than an upper limit water level (S93: NO), it returns to S92 and filtered water is supplied continuously. Furthermore, when filtered water is supplied and the filtered water in the first reaction tank 31 is determined to be equal to or higher than the upper limit water level (S93: YES), it is not necessary to supply filtered water to the first reaction tank 31, The 2nd reaction tank process start signal which permits the start of the process of the 2 reaction tank 32 is output (S94).

  Next, it is determined whether or not the second reaction tank 32 is in a circulation decoloring process (S95). Here, when the filtered water in the second reaction tank 32 is in the circulation decolorization process (S95: YES), the circulation pipes 45, 46, and 47 cannot be used, so the process returns to S93 to be in a standby state. Further, when the second reaction tank 32 is not in the process of circulating decolorization (S95: NO), the first circulation channel is opened by switching the electromagnetic valves 52, 53, 54 (S96). Further, the ozone generator 13 is operated (S97), and the mixing pump 12 is operated (S98). Then, since the filtered water of the 1st reaction tank 31 circulates through a 1st circulation channel, it reacts with ozone and decoloring advances.

  Thereafter, the chromaticity of the filtered water circulating through the first circulation channel is detected (S99). Specifically, the chromaticity sensor 85 in the first reaction tank 31 detects the chromaticity of the filtered water (decolorized water) in the first reaction tank 31, and the detection signal is input to the CPU 110a. Then, it is determined whether or not the chromaticity value has decreased to a decolorized water reference chromaticity or less (for example, 100 degrees or less) (S100). Here, when it has not yet decreased below the decolorized water reference chromaticity (S100: NO), the circulating decoloring process is continued and the chromaticity is continuously monitored (S99, S100). And when the chromaticity of filtered water falls below the decolored water reference chromaticity (S100: YES), the solenoid valve 54 is switched without stopping the ozone generator 13, and the circulation pipe 45 and the decolorized water supply pipe 50 are switched. The decolorized water supply flow path constituted by is opened (S101).

  Thus, the decolorized water in the first reaction tank 31 passes through the circulation pipe 43 and the circulation pipe 47 and is sucked into the mixing pump 12, and ozone is further mixed in the mixing pump 12. The mixed water mixed with ozone is further decolorized while passing through the decolorized water supply pipe 50, and decolored to a target chromaticity (for example, 30 degrees) when passing through the outlet of the decolorized water supply pipe 50. Therefore, decolorized water having the target chromaticity can be supplied to the storage tank 9.

  Further, it is determined whether or not the water level of the decolorized water in the first reaction tank 31 is less than the lower limit water level (S102). Here, when the water level is equal to or higher than the lower limit water level (S102: NO), the process returns to S102, the decolorized water is continuously supplied to the storage tank 9, and the water level is monitored. And when a water level falls below a minimum water level (S102: YES), the ozone generator 13 is stopped (S103) and the mixing pump 12 is stopped (S104). Subsequently, the solenoid valve 54 is switched, and the decolorized water supply flow path is closed (S105). Subsequently, in a second reaction tank start process described later, it is determined whether or not a first reaction tank process start signal is output (S106). While the first reaction tank processing start signal is not output (S106: NO), the filtered water is supplied to the second reaction tank 32, so that the process returns to S106 and enters a standby state. And when supply of the filtered water to the 2nd reaction tank 32 is complete | finished and the 1st reaction tank process start signal is output (S106: YES), it returns to S91 and a process is repeated.

  Next, the second reaction tank decoloring process will be described. As shown in FIG. 15, first, it is determined whether or not there is a second reaction tank processing start signal (S111). If there is no second reaction tank processing start signal yet (S111: NO), the process returns to S111 and enters a standby state. And when there exists a 2nd reaction tank process start signal (S111: YES), it is judged whether the water level of the filtered water of the 2nd reaction tank 32 is less than an upper limit water level (S112). Here, when the 2nd reaction tank 32 is more than an upper limit water level (S112: NO), since it is not necessary to supply filtered water to the 2nd reaction tank 32, the start of the process of the 2nd reaction tank 32 is permitted. A one-reactor process start signal is output (S115). Moreover, when it is less than an upper limit water level (S112: YES), the valve seat by the side of the filtrate water piping 39 of the solenoid valve 51 is opened, and filtrate water is supplied in the 2nd reaction tank 32 (S113). Next, it is determined whether or not the water level in the second reaction tank 32 is equal to or higher than the upper limit water level (S114). When it is not determined that the water level is equal to or higher than the upper limit water level (S114: NO), the process returns to S113 and the water level is continuously monitored. And when it is judged that a water level is more than an upper limit water level (S114: YES), the 1st reaction tank process start signal which permits the start of the process of the 2nd reaction tank 32 is output (S115). Thereby, in the 1st reaction tank decoloring process, the 1st reaction tank process start signal outputted by the 2nd reaction tank decoloring process is recognized (S106: YES shown in Drawing 14), and the 1st reaction tank decoloring process The process from S91 is executed.

  Next, it is determined whether or not the first reaction tank 31 is in a circulation decoloring process (S116). And when the 1st reaction tank 31 is performing the circulation decoloring process (S116: YES), it returns to S114 and a process is repeated. Further, when the first reaction tank 31 is not in the circulation decoloring process (S116: NO), the second circulation flow path is opened by switching the electromagnetic valves 52, 53, 54 (S117). Further, the ozone generator 13 is operated (S118), and the mixing pump 12 is operated (S119). Then, since the filtered water in the second reaction tank 32 circulates in the second circulation channel, it reacts with ozone and decolorization proceeds.

  Thereafter, the chromaticity of the decolorized water circulating through the second circulation channel is detected (S120). Specifically, the chromaticity sensor 86 in the second reaction tank 32 detects the chromaticity of the decolorized water in the second reaction tank 32, and the detection signal is input to the CPU 110a. Then, it is determined whether or not the chromaticity value has decreased to a decolorized water reference chromaticity or less (for example, 100 degrees or less) (S121). If the decolorized water has not yet decreased below the decolorized water reference chromaticity (S121: NO), the cyclic decoloring process is continued and the chromaticity is continuously monitored (S120). And when it falls to below decoloration water reference chromaticity (S121: YES), the ozone generator 13 is not stopped, the solenoid valve 54 is switched, and decoloration water supply comprised by the circulation piping 45 and the decolorization water supply pipe 50 is carried out. The flow path is opened (S122).

  Accordingly, the decolorized water in the second reaction tank 32 passes through the circulation pipe 44 and the circulation pipe 47 and is sucked into the mixing pump 12, and ozone is further mixed in the mixing pump 12. The mixed water mixed with ozone is further decolorized while passing through the decolorized water supply pipe 50, and decolored to a target chromaticity (for example, 30 degrees) when passing through the outlet of the decolorized water supply pipe 50. Therefore, decolorized water having the target chromaticity can be supplied to the storage tank 9.

  Further, it is determined whether or not the water level of the decolorized water in the second reaction tank 32 is less than the lower limit water level (S123). Here, when the water level is equal to or higher than the lower limit water level (S123: NO), the process returns to S123, decolorized water is continuously supplied to the storage tank 9, and the water level is monitored. And when a water level falls below a minimum water level (S123: YES), the ozone generator 13 is stopped (S124). Further, the mixing pump 12 is stopped (S125). Subsequently, the solenoid valve 54 is switched to close the decolorized water supply channel (S126). Thereafter, the process returns to S111 and the process is repeated.

  As described above, in the circulating flush toilet system of the third embodiment, the first reaction tank 31 and the second reaction tank 32 are provided with chromaticity sensors 85 and 86, respectively. And CPU110a controls the timing which opens a decolored water supply flow path based on each detection value of the chromaticity sensors 85 and 86, and more accurately and chromaticity of the decolorized water supplied to the storage tank 9 is obtained. It is characterized in that it can be held stably. That is, since the chromaticity of the decolorized water in each reaction tank can be directly detected by the chromaticity sensors 85 and 86, compared to the case of controlling based on the operation time of the ozone generator 13 as in the second embodiment. Decolorized water having a stable target chromaticity can be stored in the storage tank 9.

  In the third embodiment, as in the second embodiment, when the filtered water in each reaction tank is decolored to the decolorized water reference chromaticity, the decolorized water supply channel is opened and the decolorized water supply pipe 50 is connected. Ozone decolorization was also performed in the tube. For example, as in the circulating flush toilet system 1 of the first embodiment, the filtered water in each reaction tank was completely decolored to the target chromaticity, and then the ozone decoloration was performed. The generator 13 may be stopped and supplied to the storage tank 9 via the decolorized water supply pipe 50.

  Next, the circulation type flush toilet system 100 of 4th Embodiment is demonstrated. FIG. 16 is a configuration diagram of the circulating flush toilet system 100, FIG. 17 is a configuration diagram showing configurations of the ozone decoloring unit 80 and the controller 120, and FIG. 18 is a control of the first reaction tank decoloring process by the CPU 120a. FIG. 19 is a flowchart showing a control operation of the first reaction tank decoloring process by the CPU 120a.

  The circulating flush toilet system 100 has a mechanism for overflowing the decolorized water stored in the storage tank 90 and supplying it to the biological treatment tank 6. And according to the use frequency of the flush toilet 5, the overflow amount of the decolorized water in the holiday night can be controlled. Thereby, since the chromaticity of the filtrate supplied to the ozone decoloring unit 80 can be diluted and maintained at a constant level, the load on the ozone decoloring unit 80 can be reduced. The fourth embodiment is characterized in that the amount of overflow water is controlled based on the chromaticity of filtered water.

  As shown in FIGS. 16 and 17, the circulating flush toilet system 100 basically includes the structure of the circulating flush toilet system 1 (see FIG. 1) according to the first embodiment, and an ozone decoloring unit. 80 and a controller 120 that performs a control operation different from those of the above embodiments. Therefore, parts having the same structure are denoted by the same reference numerals, description thereof is omitted, and parts having different structures will be mainly described. In the following description, the “overflow water” of the storage tank 90 refers to decolorized water that has overflowed due to the supply of decolorized water from the decolorized water supply pipe 50 of the ozone decoloring section 80 when the storage tank 90 is full. Say.

  As shown in FIG. 16, the circulating flush toilet system 100 is mainly composed of a flush toilet 5, a biological treatment tank 6, a filtration tank 7, an ozone decoloring unit 80, and a storage tank 90. A washing water supply pipe 15 is provided between the storage tank 90 and the flush toilet 5, and a pump 16 is provided in the washing water supply pipe 15. Further, the circulating flush toilet system 100 includes a controller 120 (FIG. 18) that controls the processing operation in each processing tank. The ozone decoloring unit 80 has the same structure as that of the third embodiment.

  The storage tank 90 is provided adjacent to the filtration tank 7. Furthermore, a float mounting plate 37 extending from the upper part of the storage tank 90 to the middle stage is disposed inside the storage tank 90. A full water float 75 for detecting whether or not the decolorized water stored in the storage tank 90 is full is fixed to the upper part of the float mounting plate 37. Further, an overflow water pipe 99 for supplying the overflow water of the storage tank 90 to the biological treatment tank 6 is disposed between the storage tank 90 and the biological treatment tank 6. The filtration device 17 is provided with a filtered water overflow pipe 77 for overflowing the filtered water of the filtration device 17 to the biological treatment tank 6.

  The controller 120 includes a CPU 120a as a central processing unit, a ROM 120b and a RAM 120c connected to each other around the CPU 120a. Further, the CPU 120a is provided with an I / O interface 120d. The I / O interface 120d is connected to the solenoid valves 51, 52, 53, 54, the blower 18, the mixing pump 12, the ozone generator 13, and the first upper limit float via wires not shown. 70, a first lower limit float 71, a second upper limit float 73, a second lower limit float 74, chromaticity sensors 85 and 86, and a full water float 75 are connected to each other.

  Next, the flow of overflow water in the circulating flush toilet system 100 will be described. The frequency of use of the flush toilet 5 is lower during the holidays at night than during the daytime. In this case, since sewage does not flow into the biological treatment tank 6, if this state is left as it is, the supply of biological treatment water to the filtration tank 7 is stopped, and thus the flow of biological treatment water around the filtration device 17 is stopped. This may cause clogging of the filtration membrane of the filtration device 17. Therefore, in the case of a holiday at night, the decolorized water in the storage tank 90 is full without being reduced. Therefore, the decolorized water is supplied from the ozone decoloring unit 80 to the storage tank 90 to overflow the decolorized water to the outside of the tank. This overflow water is supplied to the biological treatment tank 6 through the overflow water pipe 99. Further, when the overflow water is supplied to the biological treatment tank 6, the biological treatment water is diluted, so that it is possible to prevent the chromaticity of the filtered water from increasing due to the frequency of use of the flush toilet 5. Furthermore, in this embodiment, the ozone decoloring process in the ozone decoloring unit 80 is performed efficiently and stably by controlling the amount of overflow water in accordance with the chromaticity of the filtrate water supplied to the ozone decoloring unit 80. Can do.

  Further, immediately after the decolorized water is overflowed from the storage tank 9, the storage tank 90 is not full, so that the overflow water cannot be supplied to the biological treatment tank 6. In this case, the filtrate is overflowed from the filtration device 17 so as to be supplied to the biological treatment tank 6 via the filtrate overflow pipe 77. Thereby, since the biologically treated water is supplied to the filtration tank 7 and the flow of the biologically treated water around the filtration device 17 is maintained, clogging of the filtration membrane can be prevented.

  Next, the relationship between the usage frequency of the flush toilet 5 and the chromaticity of filtered water will be described. For example, when the use frequency of the flush toilet 5 is high, the amount of sewage flowing into the biological treatment tank 6 increases. In this case, in the biological treatment tank 6, the organic matter in the sewage cannot be completely treated, and thus the organic matter that could not be decomposed by microorganisms remains and accumulates in the biological treatment water. That is, since the remaining organic matter becomes a chromaticity component, the chromaticity of filtered water obtained by filtering biologically treated water tends to increase. On the contrary, when the frequency of use of the flush toilet 5 is low, the amount of sewage flowing into the biological treatment tank 6 is reduced. In this case, the biological treatment tank 6 can treat the organic matter in the sewage, so that no organic matter remains in the biological treatment water. Therefore, the chromaticity of filtrate obtained by filtering biologically treated water tends to be low. That is, the usage frequency of the flush toilet 5 can be estimated by detecting the chromaticity of the filtered water supplied to the first reaction tank 31. And CPU120a of this embodiment can maintain chromaticity of filtered water stably to a fixed level by controlling the amount of overflow water based on the chromaticity of filtered water supplied to ozone decoloring part 80. .

  Next, the filtered water reference chromaticity and the decolorized water reference chromaticity will be described. The chromaticity of the filtered water is detected by the chromaticity sensor 85 of the first reaction tank 31 shown in FIG. The filtered water reference chromaticity is set as a chromaticity value that serves as a reference as to whether or not the decolorized water in the storage tank 90 is overflowed. Therefore, the filtered water reference chromaticity is set according to the scale and processing capacity of the ozone decoloring unit 80. On the other hand, the decolorized water reference chromaticity is opened in order to obtain decolorized water having the target chromaticity (for example, 30 degrees) at the outlet of the decolorized water supply pipe 50, as in the third embodiment. What is necessary is just to set as chromaticity (for example, 100 degree | times) at the time of doing.

  Next, the control operation of the ozone decoloring unit 80 by the CPU 120a will be described with reference to the flowcharts shown in FIGS. First, when the activation switch (not shown) of the circulating flush toilet system 100 is turned on, the first reaction tank decoloring process (see FIG. 18) and the second reaction tank decoloring process (see FIG. 19) are executed simultaneously. The And like 1st thru | or 3rd embodiment, a 1st reaction tank decoloring process is advanced before a 2nd reaction tank decoloring process. Therefore, in the second reaction tank decoloring process shown in FIG. 19, first, in the first reaction tank decoloring process, was the second reaction tank process start signal described later for permitting the start of the process of the second reaction tank 32 output? It is determined whether or not (S151). Then, the process does not proceed until the second reaction tank treatment start signal is output (S151: NO), and the standby state is maintained until the second reaction tank treatment start signal is output (S151).

  First, the 1st reaction tank decoloring process is demonstrated. As shown in FIG. 18, first, it is determined whether or not the first reaction tank 31 is lower than the upper limit water level (S131). Here, when it is already determined that the first reaction tank 31 is equal to or higher than the upper limit water level (S131: NO), a second reaction tank process start signal that permits the start of the process of the second reaction tank 32 is output. (S134). Moreover, when the water level of the filtrate of the 1st reaction tank 31 is less than an upper limit water level (S131: YES), the valve seat by the side of the filtrate water piping 38 in the solenoid valve 51 is opened, and filtrate water enters the 1st reaction tank 31. Is supplied (S132).

  Next, it is determined whether or not the filtered water in the first reaction tank 31 is equal to or higher than the upper limit water level (S133). And when it is judged that the filtered water in the 1st reaction tank 31 is not more than an upper limit water level (S133: NO), it returns to S132 and filtered water is supplied continuously. Furthermore, when filtrate water is supplied and the filtrate water in the 1st reaction tank 31 is judged to be more than an upper limit water level (S133: YES), since it is not necessary to supply filtrate water to the 1st reaction tank 31, 1st The 2nd reaction tank process start signal which permits the start of the process of the 2 reaction tank 32 is output (S134).

  Next, it is determined whether or not the second reaction tank 32 is in a circulation decoloring process (S135). Here, when the filtered water in the second reaction tank 32 is in a circulation decolorization process, the circulation pipes 45 and 47 cannot be used. Therefore, when the 2nd reaction tank 32 is performing the circulation decoloring process (S135: YES), it returns to S133 and a process is repeated. Moreover, when the 2nd reaction tank 32 is not in the circulation decoloring process (S135: NO), the chromaticity of the filtrate stored in the 1st reaction tank 31 is detected (S136). The chromaticity of the filtered water in the first reaction tank 31 is detected by the chromaticity sensor 85. Further, it is determined whether or not the storage tank 90 is full and the chromaticity of the filtered water is equal to or lower than the filtered water reference chromaticity (S137). Here, when the storage tank 90 is not full (S137: NO), the flush toilet 5 is frequently used, and the decolorized water in the storage tank 90 is used, so that the decolored water is usually stored in the storage tank 90. Cyclic decolorization is performed. Therefore, the solenoid valves 52, 53, 54 are switched, the first circulation channel is opened (S138), the ozone generator 13 is operated (S139), and the mixing pump 12 is operated (S140). In addition, it is estimated that the storage tank 90 is not full is the daytime when the flush toilet 5 is used frequently.

On the other hand, when the flush toilet 5 is not used as at night on a holiday, the storage tank 90 becomes full of water. And when the storage tank 90 is full of water and the chromaticity of filtered water exceeds the filtered water reference chromaticity (S137: NO), it is estimated that the frequency of use of the flush toilet 5 during the daytime was high. In this case, it is desirable to overflow the decolorized water in the storage tank 90 and dilute the biological treated water in the biological treatment tank 6 to lower the filtered water chromaticity. Therefore, in order to overflow from the storage tank 90,
Perform normal circulation decolorization. That is, the solenoid valves 52, 53, and 54 are switched, the first circulation passage is opened (S138), the ozone generator 13 is operated (S139), and the mixing pump 12 is operated (S140).

  Then, the chromaticity of the decolorized water circulating through the first circulation channel is detected (S141). Then, it is determined whether or not the chromaticity value has decreased to a decolorized water reference chromaticity or less (for example, 100 degrees or less) (S142). Here, when the chromaticity of the decolorized water circulating through the first circulation channel has not yet decreased below the decolorized water reference chromaticity (S142: NO), the process returns to S141, and the circulation decoloring process is continued as it is. Subsequently, the chromaticity is monitored (S142). And when the chromaticity of decolored water falls below the decolorized water reference chromaticity (S142: YES), the solenoid valve 54 is switched without stopping the ozone generator 13 (S143). Then, the decolorized water supply flow path constituted by the circulation pipe 45 and the decolorized water supply pipe 50 is opened.

  Accordingly, the decolorized water in the first reaction tank 31 passes through the circulation pipe 43 and the circulation pipe 47, and ozone is further mixed in the mixing pump 12 and further decolorized while passing through the decolorized water supply pipe 50. . Therefore, when passing through the outlet of the decolorized water supply pipe 50, the decolorized water is decolorized to the target chromaticity (for example, 30 degrees), so that the decolorized water having the target chromaticity can be supplied to the storage tank 90.

  Then, if decolorized water is supplied when the storage tank 90 is full, the decolorized water overflows, and the overflow water is supplied to the biological treatment tank 6 via the overflow water pipe 99. Thereby, since the biological treatment water in the biological treatment tank 6 is diluted, the chromaticity of the filtered water supplied from the filtration apparatus 17 of the filtration tank 7 can be reduced.

  Next, it is determined whether or not the water level of the decolorized water in the first reaction tank 31 is less than the lower limit water level (S144). Here, when the water level is equal to or higher than the lower limit water level (S144: NO), the process returns to S144, the decolorized water is continuously supplied to the storage tank 90, and the water level is monitored. And when a water level falls below a minimum water level (S144: YES), the ozone generator 13 is stopped (S145) and the mixing pump 12 is stopped (S146). Subsequently, the solenoid valve 54 is switched to close the decolorized water supply channel (S147). Further, in the second reaction tank start process described later, it is determined whether or not a first reaction tank process start signal is output (S148). While the first reaction tank processing start signal is not output (S148: NO), the filtered water is supplied to the second reaction tank 32, so that the process returns to S148 and enters a standby state. And when supply of the filtered water to the 2nd reaction tank 32 is complete | finished and the 1st reaction tank process start signal is output (S148: YES), it returns to S131 and a process is repeated.

  In addition, when the storage tank 90 is full of water during the holidays, if the chromaticity of the filtrate is equal to or lower than the filtrate chromaticity (S137: YES), it is estimated that the frequency of use of the flush toilet 5 during the daytime was low. In this case, since the chromaticity of filtered water is sufficiently low, it is not necessary to overflow the decolorized water in the storage tank 90 and dilute the biological treatment water in the biological treatment tank 6. In this case, it returns to S133, without performing ozone circulation decoloring, and the chromaticity of filtered water and the water level of the storage tank 90 are monitored. Thus, when the decolorizing water is sufficient in the storage tank 90 and the chromaticity of the filtered water is sufficiently low, the circulation decoloring process of each reaction tank is not performed and the overflow is not caused, so the ozone generator 13 and the mixing pump 12 etc. are not made useless. Therefore, the power cost of the ozone generator 13 and the mixing pump 12 for the operation of the ozone decoloring unit 80 can be saved.

  Next, the second reaction tank decoloring process will be described. As shown in FIG. 19, first, it is determined whether or not there is a second reaction tank processing start signal (S151). If there is still no second reaction tank processing start signal (S151: NO), it can be assumed that filtered water is being supplied to the first reaction tank 31, so that the process returns to S151 and enters a standby state. And when there exists a 2nd reaction tank process start signal (S151: YES), since the filtered water supply to the 1st reaction tank 31 is complete | finished, the water level of the 2nd reaction tank 32 continues. It is determined whether it is less than the upper limit water level (S152). Here, when it is already determined that the second reaction tank 32 is equal to or higher than the upper limit water level (S152: NO), a first reaction tank process start signal that permits the start of the process of the first reaction tank 31 is output. (S155). Moreover, when it is less than an upper limit water level (S152: YES), filtrate water is supplied in the 2nd reaction tank 32 by opening the valve seat by the side of the filtrate water piping 39 of the solenoid valve 51 (S153). Next, it is determined whether or not the filtered water level in the second reaction tank 32 is equal to or higher than the upper limit water level (S154).

  Here, when the water level is not equal to or higher than the upper limit water level (S154: NO), the process returns to S153, and the filtered water is continuously supplied to the second reaction tank 32. And when the 2nd reaction tank 32 is more than an upper limit water level (S154: YES), since it is not necessary to supply filtered water to the 2nd reaction tank 32, the start of the process of the 2nd reaction tank 32 is permitted. A reaction tank processing start signal is output (S155). Thus, in the first reaction tank decoloring process, by recognizing the first reaction tank process start signal output in the second reaction tank decoloring process (S148 in FIG. 18: YES), S131 of the first reaction tank decoloring process is performed. The process from is executed.

  Next, it is determined whether or not the first reaction tank 31 is in a circulation decoloring process (S156). And when the 1st reaction tank 31 is in the process of circulation decoloring (S156: YES), it returns to S154 and a process is repeated. Moreover, when the 1st reaction tank 31 is not in the circulation decoloring process (S156: NO), the chromaticity of the filtrate stored in the 2nd reaction tank 32 is detected (S157). Then, it is determined whether or not the storage tank 90 is full and the chromaticity of the filtered water is equal to or lower than the filtered water reference chromaticity (S158). Here, when the storage tank 90 is not yet full (S158: NO), normal circulation decolorization is performed to store decolorized water in the storage tank 90. That is, the solenoid valves 52, 53, and 54 are switched, the second circulation passage is opened (S159), the ozone generator 13 is operated (S160), and the mixing pump 12 is operated (S161).

  Moreover, when the storage tank 90 is full and the chromaticity of filtered water exceeds the filtered water reference chromaticity (S158: YES), the overflow from the storage tank 90 is performed as in the first reaction tank ozone decolorization process. In order to achieve this, normal circulation decolorization is performed. That is, the solenoid valves 52, 53, and 54 are switched, the second circulation passage is opened (S159), the ozone generator 13 is operated (S160), and the mixing pump 12 is operated (S161).

  Thereafter, the chromaticity of the filtered water circulating through the second circulation channel is detected (S162). Then, it is determined whether or not the chromaticity value has decreased to a decolorized water reference chromaticity or less (for example, 100 degrees or less) (S163). Here, when the chromaticity of the decolorized water circulating through the second circulation channel has not yet decreased below the decolorized water reference chromaticity (S163: NO), the process returns to S162 and the circulation decolorization process is continued as it is. Subsequently, the chromaticity is monitored (S163). And when the chromaticity of decolored water falls below the decolorized water reference chromaticity (S163: YES), the solenoid valve 54 is switched without stopping the ozone generator 13 (S164). Then, the decolorized water supply flow path constituted by the circulation pipe 45 and the decolorized water supply pipe 50 is opened, and the decolorized water is decolored to the target chromaticity (for example, 30 degrees) when passing through the outlet of the decolorized water supply pipe 50. Therefore, decolorized water having the target chromaticity can be supplied to the storage tank 90.

  As described above, when the decolorized water is sequentially supplied when the storage tank 90 is full, the decolorized water overflows. Therefore, the overflow water is supplied to the biological treatment tank 6 via the overflow water pipe 99. The Thereby, since the biological treatment water in the biological treatment tank 6 is diluted, the chromaticity of the filtered water supplied from the filtration apparatus 17 of the filtration tank 7 can be reduced.

  Further, it is determined whether or not the water level of the decolorized water in the second reaction tank 32 is less than the lower limit water level (S165). Here, when the water level is equal to or higher than the lower limit water level (S165: NO), the process returns to S165, the decolorized water is continuously supplied to the storage tank 90, and the water level is monitored. And when a water level falls below a minimum water level (S165: YES), the ozone generator 13 is stopped (S166) and the mixing pump 12 is stopped (S167). Subsequently, the solenoid valve 54 is switched to close the decolorized water supply channel (S168). Thereafter, the process returns to S151 and the process is repeated.

  As described above, the circulating flush toilet system 100 of the fourth embodiment includes a mechanism for overflowing the decolorized water in the storage tank 90 and supplying it to the biological treatment tank 6. And the chromaticity of the filtered water supplied to the 1st reaction tank 31 or the 2nd reaction tank 32 is detected, and according to the detected chromaticity, the storage tank 90 controls the amount of overflow water when it is full. it can. Thereby, since the chromaticity of the filtered water supplied to the ozone decoloring part 80 can be maintained at a fixed level, the ozone decoloring process concerning the ozone decoloring part 80 can be performed efficiently. Furthermore, when the chromaticity of the filtered water is low, the decolorized water is not overflowed by not operating the ozone decoloring unit 80, so that the power cost for the operation of the ozone decoloring unit 80 can be reduced.

  Next, a circulating flush toilet system according to a fifth embodiment will be described. 20 is a block diagram showing the configuration of the ozone decoloring unit 80 and the controller 150, FIG. 21 is a schematic diagram showing the storage area of the ROM 150b in the controller 150, and FIG. 22 is the first reaction tank decoloring by the CPU 150a. FIG. 23 is a flowchart showing the control operation of the second reaction tank decoloring process by the CPU 150a, and FIG. 24 is a flowchart showing the control operation of the decoloring process at full water by the CPU 150a.

  This circulation flush toilet system is a modification of the circulation flush toilet system 100 according to the fourth embodiment, and can control the amount of overflow water of decolorized water during the holidays according to the frequency of use of the flush toilet 5. And it has the characteristics in that the amount of overflow water can be controlled according to the usage frequency of the flush toilet 5 in the daytime (that is, the number of times of decoloring treatment of the ozone decoloring unit 80).

  In addition, as shown in FIG. 20, the circulation flush toilet system of 5th Embodiment is fundamentally equipped with the structure of the circulation flush toilet system 100 (refer FIG. 16) which is 4th Embodiment, and ozone decoloration is carried out. And a controller 150 that executes a control operation different from that of the controller 120 (see FIG. 17). Therefore, portions having the same structure as the circulating flush toilet system 100 of the fourth embodiment are denoted by the same reference numerals, description thereof is omitted, and the controller 150 and the control operation of the CPU 150a will be mainly described.

  First, the controller 150 will be described. As shown in FIG. 20, the controller 150 includes a CPU 150a as a central processing unit, a ROM 150b and a RAM 150c connected to each other around the CPU 150a. Further, the CPU 150a is provided with an I / O interface 150d. The I / O interface 150d is connected to electromagnetic valves 51, 52, 53, 54, a blower 18, a mixing pump 12, an ozone generator 13, a first upper limit float 70, via wiring not shown. A first lower limit float 71, a second upper limit float 73, a second lower limit float 74, chromaticity sensors 85 and 86, and a full water float 75 are connected to each other.

  Next, each storage area of the ROM 150b will be described. As shown in FIG. 21, the ROM 150b stores a program storage area 150b1 for storing a program executed by the CPU 150a, and a night processing count table showing the relationship between the number of bleaching processes in the daytime and the corresponding number of bleaching processes at night. Each night processing count table storage area 150b2 is provided. In this night processing count table, the value of the number of daytime bleaching processes is divided every predetermined number of times, and the number of night processing setting times n for performing the color removal processing on holiday nights corresponding to the number of daytime bleaching processes divided every predetermined number of times. Is set for each. For example, the number of daytime decoloring processes is divided into three ranges of 0 or more and less than d1, d1 or more and less than d2, and d2 or more. The night processing setting number n is 3 times when the number of daytime decoloring processing is 0 or more and less than d1, and 5 times when the number of daytime decoloring processing (the value of the daytime processing number counter p) is d1 or more and less than d2, When the number of daytime decoloring processes is d2 or more, each is set to 10 times. It should be noted that the number of daytime decolorization processing times in the nighttime processing frequency table, the number of daytime decolorization processing times set, and the like are not limited to the above.

  Next, a method for distinguishing between daytime and holiday night will be described. For example, the frequency of use of the flush toilet 5 is higher in the daytime than on a holiday nighttime. Therefore, since the decolorized water stored in the storage tank 90 is frequently used as washing water, the decolorized water stored in the storage tank 90 is almost never full. On the other hand, the frequency of use of the flush toilet 5 is lower during the night on holidays than during the daytime. Therefore, since the number of times that the decolorized water stored in the storage tank 90 is used as washing water is small, the decolorized water stored in the storage tank 90 is often full. Therefore, the CPU 150a of the controller 150 according to the present embodiment detects whether the decolorized water in the storage tank 90 is full or not with the full water float 75, and determines that it is a holiday night when it is full and daytime when it is not full. Then, the CPU 150a counts the number of decoloring processes performed by the ozone decoloring unit 80 during the daytime when the water is not full, and sets the number of decoloring processes during the holiday night based on the count value.

  Next, a method for counting the number of decoloring processes in the ozone decoloring unit 80 will be described. The number of decolorization treatments is counted by the number of times that decolorized water is supplied from the ozone decoloring unit 80 to the storage tank 90, that is, the number of times that the decolorized water supply flow path in the electromagnetic valve 54 (see FIG. 20) is opened and closed. For example, the decolorization process of the 1st reaction tank 31 is complete | finished, decoloring water of the 1st reaction tank 31 is supplied to the storage tank 90 by opening of a decoloring water supply flow path, and decoloring is performed by closing a decoloration water supply flow path. The number of processes is counted as one. Next, the decolorization process of the second reaction tank 32 is completed, and the decolorized water supply channel is opened, the decolorized water in the second reaction tank 32 is supplied to the storage tank 90, and the decolorized water supply channel is closed, thereby decolorizing. The number of processes is counted as two. And the frequency of use of the flush toilet 5 in the daytime can be estimated by counting the number of times of decoloring treatment in the daytime when the storage tank 90 is not full. For example, when the number of daytime decolorization treatments is large, the use frequency of the flush toilet 5 is high, and it is estimated that the chromaticity of filtered water is high. On the other hand, when the number of decolorizations in the daytime is small, the use frequency of the flush toilet 5 is low, and it is estimated that the chromaticity of filtered water is low. The number of decolorizations in the daytime is counted by the daytime processing number counter p.

  Next, a method for setting the number of decoloring processes at night on holidays will be described. As described above, since the decolorized water is not used during the holidays, the storage tank 90 is full. Therefore, when the decolorized water is supplied from the ozone decoloring unit 80 to the full storage tank 90, the decolorized water in the storage tank 90 overflows, so that the overflow water passes through the overflow water pipe 99 and the biological treatment tank 6. To be supplied. Therefore, the amount of overflow water during holidays and nights can be controlled by adjusting the number of times of supply of decolorized water during holidays and nights (the number of decolorization processes) according to the number of decolorization processes during the daytime. The number of daytime decoloring treatments is proportional to the frequency of use of the flush toilet 5, and the chromaticity of filtered water is proportional to the frequency of use. That is, since the amount of overflow water is controlled according to the chromaticity of filtered water, the chromaticity of filtered water can be maintained at a constant level. In the present embodiment, the CPU 150a performs night processing on a holiday corresponding to the number of daytime decoloring processes counted in the daytime based on the nighttime processing count table stored in the nighttime processing count table storage area 150b2 provided in the ROM 150b. The set number n is set.

  Next, the control operation of the ozone decoloring unit 80 by the CPU 150a will be described with reference to the flowcharts shown in FIG. 22, FIG. 23, and FIG. First, when the activation switch (not shown) of the circulating flush toilet system is turned on, the first reaction tank decoloring process (see FIG. 22) and the second reaction tank decoloring process (see FIG. 23) are performed simultaneously. . And like 1st thru | or 4th embodiment, a 1st reaction tank decoloring process is advanced before a 2nd reaction tank decoloring process. Therefore, in the second reaction tank decoloring process shown in FIG. 23, first, in the first reaction tank decoloring process, was the second reaction tank process start signal described later for permitting the start of the process of the second reaction tank 32 output? It is determined whether or not (S221). Then, until the second reaction tank processing start signal is output (S221: NO), the process returns to S221, the process does not proceed, and the standby state is maintained until the second reaction tank processing start signal is output. .

  On the other hand, in the first reaction tank decoloring process, as shown in FIG. 22, first, both the daytime processing number counter p for counting the number of daytime decoloring processes and the nighttime processing number counter s for counting the number of nighttime processes are reset. (S171). Next, it is determined whether or not the first reaction tank 31 is less than the upper limit water level (S172). Here, when the water level of the filtrate water in the first reaction tank 31 is less than the upper limit water level (S172: YES), the valve seat on the filtrate water pipe 38 side in the electromagnetic valve 51 is opened, and the filtrate water is in the first reaction tank 31. (S173). On the other hand, when the 1st reaction tank 31 is more than an upper limit water level (S172: NO), since it is not necessary to supply filtered water to the 1st reaction tank 31, the start of the process of the 2nd reaction tank 32 is permitted. A reaction tank processing start signal is output (S175).

  And filtered water is supplied in the 1st reaction tank 31 (S173), and it is judged whether the 1st reaction tank 31 is more than an upper limit water level (S174). If the water level is still below the upper limit water level (S174: NO), the process returns to S173, the decolorized water is continuously supplied to the storage tank 9, and the water level is monitored (S174). Thereafter, when the water level is equal to or higher than the upper limit water level (S174: YES), a second reaction tank processing start signal is output (S175). Next, it is determined whether or not the second reaction tank 32 is in a circulation decoloring process (S176). And when the 2nd reaction tank 32 is in the process of circulation decoloring (S176: YES), since it cannot circulate and decolor in the 1st reaction tank 31, it returns to S174 and a process is repeated.

  Further, when the second reaction tank 32 is not in the circulation decoloring process (S176: NO), it is subsequently determined whether or not the storage tank 90 is full (S177). Here, the daytime case will be described. Since the filtered water in the storage tank 90 is used as washing water as needed, the storage tank 90 will not be full. That is, decolorized water must be supplied so that the storage tank 90 does not become empty. Therefore, when the storage tank 90 is not full (S177: NO), the solenoid valves 52, 53, 54 are switched, the first circulation channel is opened (S178), and the ozone generator 13 is operated (S179). The mixing pump 12 is operated (S180). Thus, the circulating decolorization of the filtered water in the first reaction tank 31 is started.

  Then, when circulating decolorization of the filtered water in the first reaction tank 31 is started, then the chromaticity of the filtered water circulating through the first circulation channel is detected (S181). Further, it is determined whether or not the detected chromaticity value has decreased to a decolorized water reference chromaticity or less (for example, 100 degrees or less) (S182). Here, when the chromaticity of the decolorized water circulating through the first circulation channel has not yet decreased below the decolorized water reference chromaticity (S182: NO), the process returns to S181, and the circulating decolorization process is continued as it is. The chromaticity is monitored (S182). And when the chromaticity of decolored water falls below the decolorized water reference chromaticity (S182: YES), the solenoid valve 54 is switched without stopping the ozone generator 13 (S183). Then, the decolorized water supply flow path constituted by the circulation pipe 45 and the decolorized water supply pipe 50 is opened.

  Thereby, the decolorized water in the first reaction tank 31 is further decolorized while being mixed with ozone by the mixing pump 12 and passing through the decolorized water supply pipe 50. Then, when passing through the outlet of the decolorized water supply pipe 50, the decolorized water is decolored to a target chromaticity (for example, 30 degrees) and supplied to the storage tank 90.

  Next, it is determined whether or not the level of decolorized water in the first reaction tank 31 is less than the lower limit level (S184). Here, when the water level is equal to or higher than the lower limit water level (S184: NO), the process returns to S184, the decolorized water is continuously supplied to the storage tank 90, and the water level is monitored. If the water level drops below the lower limit water level (S184: YES), the ozone generator 13 is stopped (S185), the mixing pump 12 is stopped (S186), the solenoid valve 54 is switched, and the decolorized water supply flow The road is closed (S187). Then, the daytime processing number counter p is incremented by 1 (S188). Thereby, the number of times of daytime processing in the ozone decoloring unit 80 is counted as one time.

  Next, in a second reaction tank start process described later, it is determined whether or not a first reaction tank process start signal is output (S189). While the first reaction tank processing start signal is not output (S189: NO), the filtered water is supplied to the second reaction tank 32, so the process returns to S189 and is in a standby state. And when supply of the filtered water to the 2nd reaction tank 32 is complete | finished and the 1st reaction tank process start signal is output (S189: YES), it returns to S172 and a process is repeated.

  On the other hand, in the second reaction tank decoloring process, as shown in FIG. 23, it is first determined whether or not there is a second reaction tank process start signal (S221). If there is still no second reaction tank processing start signal (S221: NO), it can be assumed that filtered water is being supplied to the first reaction tank 31, so the process returns to S221 and enters a standby state. And when there exists a 2nd reaction tank process start signal (S221: YES), since the filtered water supply to the 1st reaction tank 31 is complete | finished, the water level of the 2nd reaction tank 32 continues. It is determined whether the water level is lower than the upper limit water level (S222). Here, when the water level of the filtered water in the second reaction tank 32 is equal to or higher than the upper limit water level (S222: NO), a first reaction tank process start signal that permits the process of the first reaction tank 31 is output (S225). .

  Moreover, when the water level of filtrate water is less than an upper limit water level (S222: YES), the valve seat by the side of the filtrate water piping 39 of the solenoid valve 51 is opened, and filtrate water is supplied in the 2nd reaction tank 32 (S223). . Next, it is determined whether or not the filtered water level in the second reaction tank 32 is equal to or higher than the upper limit water level (S224). Here, when it is not more than an upper limit water level yet (S224: NO), it returns to S223 and supplies filtered water to the 2nd reaction tank 32 continuously. And when the 2nd reaction tank 32 is more than an upper limit water level (S224: YES), since it is not necessary to supply filtered water to the 2nd reaction tank 32, a 1st reaction tank process start signal is output (S225). .

  Next, it is determined whether or not the first reaction tank 31 is in a circulation decoloring process (S226). And when the 1st reaction tank 31 is in the process of circulation decoloring (S226: YES), it returns to S224 and a process is repeated. Moreover, when the 1st reaction tank 31 is not in the circulation decoloring process (S226: NO), it is judged whether the storage tank 90 is full like the 1st reaction tank decoloring process (S227). Here, for example, in the daytime, the filtered water of the storage tank 90 is used, so the storage tank 90 does not become full. That is, since it is necessary to supply decolorized water so that the storage tank 90 does not become empty, when it is determined that the storage tank 90 is not full (S227: NO), normal circulation decoloration processing is performed. Therefore, the solenoid valves 52, 53, and 54 are switched, the second circulation passage is opened (S228), the ozone generator 13 is operated (S229), and the mixing pump 12 is operated (S230). Thereby, circulating decolorization of the filtrate of the 2nd reaction tank 32 is started.

  When the circulation decolorization of the second reaction tank 32 is started, the chromaticity of decolorized water circulating through the second circulation channel is subsequently detected (S231). Then, it is determined whether or not the chromaticity value has decreased to a decolorized water reference chromaticity or less (for example, 100 degrees or less) (S232). Here, when the chromaticity of the decolorized water circulating through the second circulation channel has not yet decreased below the decolorized water reference chromaticity (S232: NO), the process returns to S231, and the circulating decolorization process is continued as it is. The chromaticity is monitored (S232). And when the chromaticity of decolored water falls below the decolorized water reference chromaticity (S232: YES), the solenoid valve 54 is switched without stopping the ozone generator 13 (S233). Then, the decolorized water supply flow path constituted by the circulation pipe 45 and the decolorized water supply pipe 50 is opened.

  Thereby, the decolorized water in the second reaction tank 32 is further decolorized while being mixed with ozone by the mixing pump 12 and passing through the decolorized water supply pipe 50. Then, when passing through the outlet of the decolorized water supply pipe 50, the decolorized water is decolored to a target chromaticity (for example, 30 degrees) and supplied to the storage tank 90.

  Further, it is determined whether or not the water level of the decolorized water in the second reaction tank 32 is less than the lower limit water level (S234). Here, when the water level is equal to or higher than the lower limit water level (S234: NO), the process returns to S234, the decolorized water is continuously supplied to the storage tank 9, and the water level is monitored. And when a water level falls below a minimum water level (S234: YES), the ozone generator 13 is stopped (S235). Further, the mixing pump 12 is stopped (S236). Subsequently, the solenoid valve 54 is switched to close the decolorized water supply channel (S237). Further, the daytime processing number counter p is incremented by 1 (S238). Thereby, following the daytime process in the first reaction tank decoloring process, the number of decoloring processes in the daytime is counted as two. Next, the process returns to S221 and is repeated.

  In this way, in the daytime when the flush toilet 5 is frequently used, the decolorized water in the storage tank 90 is used as washing water as needed. And in the ozone decoloring part 80, as above-mentioned, a 1st reaction tank decoloring process and a 2nd reaction tank decoloring process are performed alternately, and decolored water is supplied to the storage tank 90 at any time. Therefore, decolorized water can be stably secured in the storage tank 90 during the daytime.

  Next, the first reaction tank decoloring process and the second reaction tank decoloring process at night on holidays will be described. First, in the first reaction tank decoloring process, for example, when the night falls on a holiday, the decolorized water in the storage tank 90 is not used, so the decolorized water is accumulated in the storage tank 90. Then, when the processing of S171 to S176 shown in FIG. 22 is completed, it is determined whether or not the storage tank 90 is full (S177). When it is determined that the storage tank 90 is full of water (S177: YES), a full-color decoloring process is performed to execute a decoloring process during a holiday night (S190).

  Here, the full-color decoloring process in S190 will be described. As shown in FIG. 24, in the full-color decoloring process, it is first determined whether or not the value of the night processing number counter s exceeds 0 (S251). The night processing number counter s counts the number of times that the electromagnetic valve 54 opens and closes the decolorized water supply channel when the storage tank 90 is full on holidays. And when the decolorization process of filtered water has not yet been performed after the storage tank 90 is full (S251: NO), whether the value of the daytime processing number counter p is 0 or more and less than d1 is subsequently determined. Is determined (S252). If it is determined that the value of p is greater than or equal to 0 and less than d1 (S252: YES), a number setting process for setting the number of decoloring processes when water is full is performed (S256). In the processing number setting process, the night processing setting number n at night is set based on the night processing number table stored in the night processing number table storage area 150b2 of the ROM 150b shown in FIG. In this case, since p is 0 times or more and less than d1 times, n = 3 times is set. If p is greater than or equal to d1 and less than d2 (S252: NO, S253: YES), n = 5 is set in the number setting process (S255). Furthermore, when p is equal to or greater than d2, n = 10 is set in the process count setting process (S254).

  In this way, when the number setting process of S254 to S256 is completed, the electromagnetic valves 52, 53, and 54 are subsequently switched, and the first circulation channel is opened (S257). Then, the ozone generator 13 is operated (S258), and the mixing pump 12 is operated (S259). Thus, the circulating decolorization of the filtered water in the first reaction tank 31 is started.

  Next, the chromaticity of decolorized water circulating through the first circulation channel is detected (S260). Then, it is determined whether or not the chromaticity value has decreased to a decolorized water reference chromaticity or less (for example, 100 degrees or less) (S261). Here, when the chromaticity of the decolorized water circulating through the first circulation channel has not yet decreased below the decolorized water reference chromaticity (S261: NO), the process returns to S260 to continue the cyclic decolorization process and continue. The chromaticity is monitored (S261). If the chromaticity of the decolorized water has decreased to the decolorized water reference chromaticity or less (S261: YES), the electromagnetic valve 54 is switched without stopping the ozone generator 13 (S262), and the decolorized water supply flow path is Opened. In the mixing pump 12, ozone is further mixed with the decolorized water. Therefore, the decolorized water is further decolored while passing through the decolorized water supply pipe 50, and the decolorized water having the target chromaticity is supplied to the storage tank 90.

  And if decoloring water is supplied to the storage tank 90 which became full, decoloring water will overflow. Further, the overflow water is supplied to the biological treatment tank 6 via the overflow water pipe 99. Next, it is determined whether or not the level of decolorized water in the first reaction tank 31 is less than the lower limit water level (S263). Here, when the water level is equal to or higher than the lower limit water level (S263: NO), the process returns to S263, the decolorized water is continuously supplied to the storage tank 9, and the water level is monitored. And when a water level falls below a minimum water level (S263: YES), the ozone generator 13 is stopped (S264) and the mixing pump 12 is stopped (S265). Subsequently, after the solenoid valve 54 is switched and the decolorized water supply channel is closed (S266), the value of the night processing number counter s is incremented by 1 (S267). Thereby, the number of decoloring processes at night is counted as one. And it transfers to S191 of the 1st reaction tank decoloring process shown in FIG.

  Next, as shown in FIG. 22, the decoloring process at full water (S190) ends, and the value of the night process count counter s is less than the night process set number n set in the number setting process (S254, S255, S256). It is determined whether or not (S191). Here, since the night processing set number n has not been reached yet (S191: YES), the process proceeds to S189, waits for the output of the first reaction tank process start signal (S189), and the process is repeated. Note that the case where the value of the night processing count counter s reaches the night processing set count n (S191: NO) will be described later.

  On the other hand, similarly, in the second reaction tank decoloring process (see FIG. 23), when the storage tank 90 is full of water (S227), the decoloring process at the time of full water is performed (S239). Then, according to the flowchart shown in FIG. Then, as shown in FIG. 24, when the decoloring process at night is already being executed, the value of the night process count counter s is at least once or more (S251: YES), so the processes of S251 to S256 are not performed. Then, the process proceeds to S257, where the second circulation flow path is opened, and the decolorization process of the filtered water is executed (S258, S259). Further, the chromaticity of the decolorized water circulating through the second circulation channel is detected (S260), and it is determined whether or not the chromaticity value has decreased to the decolorized water reference chromaticity or less (for example, 100 degrees or less). (S261). Here, when the chromaticity of the decolorized water circulating through the second circulation channel has not yet decreased below the decolorized water reference chromaticity (S261: NO), the process returns to S260, and the circulating decolorization process is continued as it is. The chromaticity is monitored (S261).

  If the chromaticity of the decolorized water has decreased to the decolorized water reference chromaticity or less (S261: YES), the electromagnetic valve 54 is switched without stopping the ozone generator 13 (S262), and the decolorized water supply flow path is It is opened and decolorized water is supplied to the storage tank 90. Next, it is determined whether or not the water level in the second reaction tank 32 is less than the lower limit number water level (S263), and while not decreasing below the lower limit number water level (S263: NO), the process returns to S263 and is repeated. When the water level in the second reaction tank 32 is reduced to below the lower limit number of water levels (S263: YES), the ozone generator 13 and the mixing pump 12 are stopped (S264, S265), and the solenoid valve 54 is switched to supply decolorized water. The flow path is closed (S266). Then, the value of the night processing count counter s is incremented by 1 (S267). Therefore, since it was processed subsequent to the above-mentioned decolorization process at the time of full water (FIG. 22: S190) of the first reaction tank decolorization process, the number of nighttime processing at night becomes two. And it transfers to S240 of the 2nd reaction tank decoloring process shown in FIG.

  Next, as shown in FIG. 23, the decoloring process at full water (S239) is finished, and the value of the night processing number counter s is less than the night processing setting number n set in the number setting process (S254, S255, S256). It is determined whether or not (S240). Here, since the night processing set number n has not been reached yet (S240: YES), the process returns to S221 and is repeated.

  Thus, when the storage tank 90 is full of water, the decolorization process at the time of full water in the first reaction decolorization process (S190 shown in FIG. 22), and the decolorization process at the time of full water in the second reaction tank decolorization process (S239 shown in FIG. 23) Are executed alternately. Then, for example, as shown in FIG. 22, the full-color decoloring process (S190) of the first reaction tank decoloring process is finished, and it is determined whether or not the value of the night processing number counter s is less than the night processing set number n. (S191) When it is determined that the value of the night processing number counter s has reached the night processing set number n (S191: NO), it is subsequently detected whether the storage tank 90 is still full. (S192). And when the storage tank 90 is still full (S192: YES), since it has already overflowed n times when the storage tank 90 is full, it is not necessary to overflow from the storage tank 90 any more. Therefore, returning to S192, the water level is continuously monitored.

  And when the flush toilet 5 begins to be used again, since the decolorized water stored in the storage tank 90 is utilized, the water level of the storage tank 90 falls. Therefore, when it is determined that the storage tank 90 is not full (S192: NO), both the daytime processing number counter p and the nighttime processing number counter s are reset (S193). Subsequently, it progresses to the process of S189 and waits for the output of the 1st reaction tank process start signal, and a process is repeated.

  Separately from this, for example, the decolorization process at the time of full water (S239) of the second reaction tank decoloring process is finished, and it is determined whether or not the value of the night processing number counter s is less than the night processing set number n (S240), If it is determined that the value of the night processing number counter s has reached the night processing set number n (S240: NO), then it is detected whether the storage tank 90 is still full (S241). If the storage tank 90 is still full of water (S241: YES), no further overflow from the storage tank 90 is made, so the process returns to S241 and the water level is continuously monitored.

  When the flush toilet 5 starts to be used again, the decolorized water stored in the storage tank 90 is used. Therefore, since the water level of the storage tank 90 is lowered, when the storage tank 90 is not full (S241: NO), both the daytime processing number counter p and the nighttime processing number counter are reset (S242). Subsequently, it progresses to the process of S221, waits for the output of the 2nd reaction tank process start signal, and a process is repeated.

  As described above, in the circulating flush toilet system of the fifth embodiment, the CPU 150a of the controller 150 counts the number of decoloring processes of the ozone decoloring unit 80 in the daytime when the storage tank 90 is not full, and uses the count value. Based on this, it is possible to control the amount of overflow water by setting the number of decoloring treatments when the water is full.

  The CPU 150a of the controller 150 can set the night processing setting number n in the holiday night corresponding to the daytime bleaching processing number based on the night processing number table stored in the night processing number table storage area 150b2 provided in the ROM 150b. The night processing setting number n is set to be proportional to the number of daytime decoloring processing. And since the number of daytime decoloring treatments is proportional to the frequency of use of the flush toilet 5, it is proportional to the chromaticity of filtered water. That is, the night processing setting number n is set corresponding to the chromaticity of the filtered water. Therefore, when the storage tank 90 is full, it can be overflowed n times by decoloring the n times set in the full setting process, so that the frequency of use of the flush toilet 5 during the day, that is, the color of the filtered water Depending on the degree, overflow water can be supplied to the biological treatment tank 6. Thereby, since the chromaticity of filtered water can be maintained at a fixed level, the power consumption which operates the ozone decoloring part 80 can be saved.

  In the first embodiment, the ozone generator 13 corresponds to “ozone generating means”, the electromagnetic valve 51 corresponds to “filtrated water flow path switching means”, and the electromagnetic valve 54 corresponds to “decolorized water supply flow path opening / closing means”. The first upper limit float 70 and the first lower limit float 71 correspond to “first water amount detection means”, and the second upper limit float 73 and the second lower limit float 74 correspond to “second water amount detection means”. . The CPU 10a that executes the process of S20 corresponds to “time measuring means”, the CPU 10a that executes the process of S23 corresponds to “first lower limit determination means”, and the CPU 10a that executes the processes of S11 and S13 corresponds to “the first time”. The CPU 10a that executes the process of S44 corresponds to “second lower limit determination means”, the CPU 10a that executes the processes of S32 and S34 corresponds to “second upper limit determination means”, and corresponds to S12. The CPU 10a that executes the process of step S33 corresponds to "first switching instruction means", the CPU 10a that executes the process of step S33 corresponds to "second switching instruction means", and the CPU 10a that executes the processes of steps S18 and S39 performs "pump operation". The CPU 10a that corresponds to the “instruction means” and that executes the process of S16 corresponds to the “first circulation flow path switching control means” and that executes the process of S37. The CPU 10a that executes the processes of S17 and S38 corresponds to the “second circulation flow path switching control means”, corresponds to the “ozone generation instruction means”, and the CPU 10a that executes the processes of S21 and S42 “the ozone generation stop means”. The CPU 10a that executes the processes of S22 and S43 corresponds to “decolorized water supply flow path opening instruction means”, and the CPU 10a that executes the processes of S24 and S45 corresponds to “pump stop means”.

  In the second embodiment, the CPU 10a that executes the processes of S59 and S80 corresponds to “time measuring means”, the CPU 10a that executes the processes of S60 and S81 corresponds to “time determining means”, and the process of S62. The CPU 10a that executes the process corresponds to “first lower limit determination means”, the CPU 10a that executes the processes of S51 and S53 corresponds to “first upper limit determination means”, and the CPU 10a that executes the process of S83 performs “second lower limit determination means”. The CPU 10a that executes the processing of S72 and S74 corresponds to “second upper limit determination means”, the CPU 10a that executes the processing of S52 corresponds to “first switching instruction means”, and performs the processing of S73. The CPU 10a to be executed corresponds to “second switching instruction means”, the CPU 10a to execute the processes of S58 and S79 corresponds to “pump operation instruction means”, and The CPU 10a that executes the processing corresponds to "first circulation flow path switching control means", and the CPU 10a that executes the process of S77 corresponds to "second circulation flow path switching control means", and executes the processes of S57 and S78. The CPU 10a corresponds to “ozone generation instructing means”, the CPU 10a that executes the processes of S61 and S82 corresponds to “decolorized water supply flow path opening instructing means”, and the CPU 10a that executes the processes of S63 and S84 is “ozone generation instruction” The CPU 10a executing the processes of S64 and S85 corresponds to “pump stop means”.

  Further, in the third embodiment, the chromaticity sensor 85 corresponds to “first chromaticity detection means”, the chromaticity sensor 86 corresponds to “second chromaticity detection means”, and executes the processing of S102. Corresponds to the “first lower limit determination means”, the CPU 110a that executes the processes of S91 and S93 corresponds to “first upper limit determination means”, and the CPU 110a that executes the process of S123 corresponds to “second lower limit determination means”. The CPU 110a that executes the processes of S112 and S114 corresponds to the “second upper limit determination unit”, the CPU 110a that executes the process of S100 corresponds to the “first chromaticity determination unit”, and the CPU 110a that executes the process of S121. Corresponds to “second chromaticity determination means”, and the CPU 110a that executes the process of S92 corresponds to “first switching instruction means”, and the CPU 110a that executes the process of S113. The CPU 110a executing the processes of S98 and S119 corresponds to the “pump operation instruction means”, and the CPU 110a executing the process of S96 corresponds to the “first circulation flow path switching control means”. The CPU 110a that executes the process of S117 corresponds to the “second circulation flow path switching control means”, the CPU 110a that executes the processes of S97 and S118 corresponds to the “ozone generation instruction means”, and the processes of S101 and S122. The CPU 110a that executes the process corresponds to “decolorized water supply flow path opening instruction means”, the CPU 110a that executes the processes of S103 and S124 corresponds to “ozone generation stop means”, and the CPU 110a that executes the processes of S104 and S125 “ It corresponds to “pump stop means”.

  In the fourth embodiment, the full water float 75 corresponds to “full water detection means”, and the chromaticity sensors 85 and 86 correspond to “filtered water chromaticity detection means”.

  Further, in the fifth embodiment, the CPU 150a that executes the processes of S188 and S238 corresponds to the “color removal number counting means”, and the CPU 150a that executes the processes of S254, S255, and S256 corresponds to the “overflow number setting means”. , D1 and d2 correspond to the “predetermined number of times”.

  The present invention is not limited to the first to fifth embodiments described above, and various modifications can be made. For example, in the first to third embodiments, the storage tank 9 is a tank independent of the biological treatment tank 6 and the filtration tank 7, but as in the fourth and fifth embodiments, It is good also as the storage tank 90 united. On the contrary, the storage tank 90 of the fourth and fifth embodiments may be a tank independent of each processing tank.

  Moreover, you may provide an overflow water piping and filtered water overflow water piping in the circulation type flush toilet system of 1st thru | or 3rd Embodiment.

  Furthermore, in the circulating flush toilet system of the fourth and fifth embodiments, the timing for opening the decolored water supply flow path by detecting the chromaticity of the decolorized water in each reaction tank in the decolorization process of each reaction tank. However, the operating time of the ozone generator 13 may be determined as in the first and second embodiments.

  In the circulating flush toilet system of the third, fourth, and fifth embodiments, the chromaticity sensor 85 is provided in the first reaction tank 31, the chromaticity sensor 86 is provided in the second reaction tank 32, and each chromaticity sensor is provided. The first reaction tank 31 and the second reaction tank 32 are separately decolorized based on the chromaticity values detected by the above, but either one of the first reaction tank 31 and the second reaction tank 32 is used. A chromaticity sensor may be installed only in the inside, and the same decoloring process may be performed in the other tank. In this case, since only one chromaticity sensor is sufficient, the cost can be reduced.

  Furthermore, you may estimate the replacement | exchange time of the filtration membrane in the filtration apparatus 17 by measuring the amount of filtrate water with the floats 70-74 provided in the 1st reaction tank 31 or the 2nd reaction tank 32. FIG. Thereby, the filtration membrane can be appropriately replaced before the filtration membrane is clogged.

  The circulating flush toilet system of the present invention can be applied not only to a toilet system equipped with a flush toilet, but also to a wastewater treatment apparatus for treating wastewater.

1 is a block diagram of a circulating flush toilet system 1. FIG. 1 is a configuration diagram of a circulating flush toilet system 1. FIG. FIG. 3 is a configuration diagram showing configurations of an ozone decoloring unit 8 and a controller 10. It is explanatory drawing which shows the flow of the process in the ozone decoloring part 8 (filtrated water supply to the 1st reaction tank 31). It is explanatory drawing (circulation decoloring process of the 1st reaction tank 31: Filtration water supply to the 2nd reaction tank 32) which shows the flow of the process in the ozone decoloring part. It is explanatory drawing which shows the flow of the process in the ozone decoloring part 8 (decolored water supply from the 1st reaction tank 31 to the storage tank 9). It is explanatory drawing (circulation decoloring process of the 2nd reaction tank 32: Supplying filtered water to the 1st reaction tank 31) which shows the flow of the process in the ozone decoloring part. It is explanatory drawing (decolored water supply from the 2nd reaction tank 32 to the storage tank 9) which shows the flow of the process in the ozone decoloring part. It is a flowchart (1st Embodiment) which shows control operation | movement of the 1st reaction tank decoloring process by CPU10a. It is a flowchart (1st Embodiment) which shows control operation | movement of the 2nd reaction tank decoloring process by CPU10a. It is a flowchart (2nd Embodiment) which shows control operation | movement of the 1st reaction tank decoloring process by CPU10a. It is a flowchart (2nd Embodiment) which shows control operation | movement of the 2nd reaction tank decoloring process by CPU10a. It is a block diagram which shows the structure of the ozone decoloring part 80 and the controller 110. It is a flowchart which shows control operation | movement of the 1st reaction tank decoloring process by CPU110a. It is a flowchart which shows control operation | movement of the 2nd reaction tank decoloring process by CPU110a. 1 is a configuration diagram of a circulating flush toilet system 100. FIG. It is a block diagram which shows the structure of the ozone decoloring part 80 and the controller 120. It is a flowchart which shows control operation | movement of the 1st reaction tank decoloring process by CPU120a. It is a flowchart which shows the control operation | movement of the 2nd reaction tank decoloring process by CPU120a. FIG. 3 is a configuration diagram showing configurations of an ozone decoloring unit 80 and a controller 150. 3 is a schematic diagram showing a storage area of a ROM 150b in a controller 150. FIG. It is a flowchart which shows the control operation | movement of the 1st reaction tank decoloring process by CPU150a. It is a flowchart which shows control operation | movement of the 2nd reaction tank decoloring process by CPU150a. It is a flowchart which shows the control operation | movement of the decoloring process at the time of water filling by CPU150a.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Circulation type flush toilet system 5 Flush toilet 6 Biological treatment tank 7 Filtration tank 8 Ozone decoloring part 9 Reservoir 10a CPU
10e timer 12 mixing pump 13 ozone generator 25 filtrate water supply pipe 31 first reaction tank 32 second reaction tank 38 filtrate water pipe 39 filtrate water pipe 41 to 47 circulation pipe 50 decolorized water supply pipe 51 to 54 solenoid valve 70 first Upper limit float 71 First lower limit float 73 Second upper limit float 74 Second lower limit float 75 Full water float 80 Ozone decoloring section 85,86 Chromaticity sensor 90 Reservoir 99 Overflow water piping 100 Circulating flush toilet system 110a CPU
120a CPU
150a CPU

Claims (13)

A flush toilet, a biological treatment tank that receives sewage from the flush toilet, performs biological treatment, a filtration tank that filters biological treated water treated in the biological treatment tank, and filtered water filtered in the filtration tank The first reaction tank and the second reaction tank to be received, the ozone generation means for generating ozone, the ozone generation means, the first reaction tank and the second reaction tank are connected to each other, and the filtered water is mixed with ozone. The flush toilet comprising: a mixed decoloring unit that generates decolored water through a decoloring reaction; and a storage tank that receives and stores the decolorized water generated by the mixed decoloring unit In the circulating flush toilet system that circulates in
The mixing and decoloring means includes
A mixing pump connected to the ozone generating means for mixing ozone with filtered water;
It is provided between the mixing pump and the first reaction tank and the second reaction tank, and is composed of a circulation pipe through which filtered water mixed with ozone is circulated by operating the mixing pump.
A filtered water supply pipe provided between the filtration tank and the first reaction tank and the second reaction tank;
A filtered water flow path switching means provided in the filtered water supply pipe and capable of switching to a flow path from the filtration tank to the first reaction tank or a flow path from the filtration tank to the second reaction tank;
A circulation flow path provided in the circulation pipe and switchable to an annular circulation flow path connecting the first reaction tank and the mixing pump or an annular circulation flow path connecting the second reaction tank and the mixing pump. Switching means;
A decolorized water supply pipe connected to the circulation pipe and supplying decolorized water in the first reaction tank or the second reaction tank to the storage tank;
A decolorized water supply flow path opening / closing means provided at a connection portion between the decolorized water supply pipe and the circulation pipe, and opening and closing a flow path from the circulation pipe to the decolorized water supply pipe;
First water amount detection means for detecting the amount of water stored in the first reaction tank;
Second water amount detection means for detecting the amount of water stored in the second reaction tank;
Time measuring means for measuring the operating time of the pump;
Time determination means for determining whether or not the measurement time measured by the time measurement means is equal to or greater than a predetermined time;
First lower limit determination means for determining whether the detected water amount of the first water amount detection means is equal to or less than a lower limit water amount;
First upper limit determination means for determining whether the detected water volume of the first water volume detection means is greater than or less than the upper limit water volume;
Second lower limit determining means for determining whether the detected water amount of the second water amount detecting means is equal to or less than the lower limit water amount;
Second upper limit determination means for determining whether the detected water amount of the second water amount detection means is greater than or less than the upper limit water amount;
A first switching instruction means for instructing the filtered water flow path switching means to open a flow path to the first reaction tank when the first upper limit determination means determines that the amount is less than the upper limit water amount;
A second switching instruction means for instructing the filtered water flow path switching means to open a flow path to the second reaction tank when the second upper limit determination means determines that the amount is less than the upper limit water amount;
A pump operation instruction means for instructing the operation of the mixing pump when the first upper limit determination means or the second upper limit determination means determines that the amount is equal to or greater than the upper limit water amount;
When the first upper limit determining means determines that the amount is equal to or greater than the upper limit water amount, the circulation flow path switching means is configured to switch the flow path of the circulation pipe to the flow path connecting the first reaction tank and the mixing means. First circulation flow path switching control means for instructing
When the second upper limit determining means determines that the amount of water is greater than or equal to the upper limit water amount, the circulation flow path switching means is configured to switch the flow path of the circulation pipe to the flow path connecting the second reaction tank and the mixing means. Second circulation flow path switching control means for instructing
Ozone generation instruction means for instructing the operation of the ozone generation means when the first upper limit determination means or the second upper limit determination means determines that the amount is equal to or greater than the upper limit water amount;
An ozone generation stop means for stopping the ozone generation means when the time determination means determines that the time is longer than a predetermined time;
When the time determining means determines that the predetermined time or longer, the decolorized water supply flow path that instructs the decolorized water supply flow path opening / closing means to open the flow path from the circulation pipe to the decolorized water supply pipe Opening instruction means;
A flow path from the circulation pipe to the decolorized water supply pipe is opened by an instruction from the decolorized water supply flow path opening instructing means, and the decolorized water in the first reaction tank or the second reaction tank is transferred to the decolorized water. And a pump stopping means for stopping the mixing pump when the first lower limit determining means or the second lower limit determining means determines that the amount is less than the lower limit water amount. A circulating flush toilet system.   The circulating water washing according to claim 1, wherein the predetermined time is adjusted to a time required for the filtered water in the first reaction tank and the second reaction tank to be decolored to a target chromaticity. Toilet system. A flush toilet, a biological treatment tank that receives sewage from the flush toilet, performs biological treatment, a filtration tank that filters biological treated water treated in the biological treatment tank, and filtered water filtered in the filtration tank The first reaction tank and the second reaction tank to be received, the ozone generation means for generating ozone, the ozone generation means, the first reaction tank and the second reaction tank are connected to each other, and the filtered water is mixed with ozone. The flush toilet comprising: a mixed decoloring unit that generates decolored water through a decoloring reaction; and a storage tank that receives and stores the decolorized water generated by the mixed decoloring unit In the circulating flush toilet system that circulates in
The mixing and decoloring means includes
A mixing pump connected to the ozone generating means for mixing ozone with filtered water;
It is provided between the mixing pump and the first reaction tank and the second reaction tank, and is composed of a circulation pipe through which filtered water mixed with ozone is circulated by operating the mixing pump.
A filtered water supply pipe provided between the filtration tank and the first reaction tank and the second reaction tank;
A filtered water flow path switching means provided in the filtered water supply pipe and capable of switching to a flow path from the filtration tank to the first reaction tank or a flow path from the filtration tank to the second reaction tank;
A circulation flow path provided in the circulation pipe and switchable to an annular circulation flow path connecting the first reaction tank and the mixing pump or an annular circulation flow path connecting the second reaction tank and the mixing pump. Switching means;
A decolorized water supply pipe connected to the circulation pipe and supplying decolorized water in the first reaction tank or the second reaction tank to the storage tank;
A decolorized water supply flow path opening / closing means provided at a connection portion between the decolorized water supply pipe and the circulation pipe, and opening and closing a flow path from the circulation pipe to the decolorized water supply pipe;
First water amount detection means for detecting the amount of water stored in the first reaction tank;
Second water amount detection means for detecting the amount of water stored in the second reaction tank;
Time measuring means for measuring the operating time of the pump;
Time determination means for determining whether or not the measurement time measured by the time measurement means is equal to or greater than a predetermined time;
First lower limit determination means for determining whether the detected water amount of the first water amount detection means is equal to or less than a lower limit water amount;
First upper limit determination means for determining whether the detected water volume of the first water volume detection means is greater than or less than the upper limit water volume;
Second lower limit determining means for determining whether the detected water amount of the second water amount detecting means is equal to or less than the lower limit water amount;
Second upper limit determination means for determining whether the detected water amount of the second water amount detection means is greater than or less than the upper limit water amount;
A first switching instruction means for instructing the filtered water flow path switching means to open a flow path to the first reaction tank when the first upper limit determination means determines that the amount is less than the upper limit water amount;
A second switching instruction means for instructing the filtered water flow path switching means to open a flow path to the second reaction tank when the second upper limit determination means determines that the amount is less than the upper limit water amount;
A pump operation instruction means for instructing the operation of the mixing pump when the first upper limit determination means or the second upper limit determination means determines that the amount is equal to or greater than the upper limit water amount;
When the first upper limit determining means determines that the amount is equal to or greater than the upper limit water amount, the circulation flow path switching means is configured to switch the flow path of the circulation pipe to the flow path connecting the first reaction tank and the mixing means. First circulation flow path switching control means for instructing
When the second upper limit determining means determines that the amount of water is greater than or equal to the upper limit water amount, the circulation flow path switching means is configured to switch the flow path of the circulation pipe to the flow path connecting the second reaction tank and the mixing means. Second circulation flow path switching control means for instructing
Ozone generation instruction means for instructing the operation of the ozone generation means when the first upper limit determination means or the second upper limit determination means determines that the amount is equal to or greater than the upper limit water amount;
When the time determining means determines that the predetermined time or longer, the decolorized water supply flow path that instructs the decolorized water supply flow path opening / closing means to open the flow path from the circulation pipe to the decolorized water supply pipe Opening instruction means;
The first lower limit determination means or the second lower limit determination means is less than the lower limit water amount in a state where the flow path from the circulation pipe to the decolorization water supply pipe is opened by an instruction from the decolorization water supply flow path opening instruction means. Ozone generation stop means for stopping the ozone generation means when it is determined that
The first lower limit determination means or the second lower limit determination means is less than the lower limit water amount in a state where the flow path from the circulation pipe to the decolorization water supply pipe is opened by an instruction from the decolorization water supply flow path opening instruction means. A circulating flush toilet system comprising pump stop means for stopping the mixing pump when it is determined that   The predetermined time is adjusted to a time required for the filtered water in the first reaction tank and the second reaction tank to be decolored to a predetermined chromaticity higher than a target chromaticity. 3. The circulating flush toilet system according to 3.   The said predetermined chromaticity is adjusted to such an extent that the chromaticity of the decoloring water at the time of passing the exit of the said decoloring water supply pipe is decolored to the said target chromaticity. Circulating flush toilet system. An overflow water pipe that is provided between the storage tank and the biological treatment tank, and causes the decolorized water in the storage tank to overflow into the biological treatment tank;
Full water detection means for detecting full water in the storage tank, and when the full water detection means does not detect full water, a decolorization frequency counting means for counting the number of decolorization processes in the first reaction tank and the second reaction tank,
Based on the count value of the decoloring frequency counting means, when the full water detecting means detects full water, the decoloring water supply flow path opening / closing means is opened to set the overflow number for overflowing the decolorizing water in the storage tank. An overflow number setting means,
The decolorized water supply flow path opening instruction means instructs the opening of the decolorized water supply flow path opening / closing means according to the number of overflows when the full water detection means detects full water. The circulating flush toilet system according to any one of 5.   The circulation type according to claim 6, wherein the overflow count setting means sets the overflow count larger when the count value is equal to or greater than the predetermined count than when the count value is less than the predetermined count. Flush toilet system. An overflow water pipe provided between the decolorization tank and the biological treatment tank, and overflowing the biological treatment tank with decolorized water in the storage tank;
A full water detection means provided in the storage tank for detecting the full water of decolorized water in the storage tank;
A filtered water chromaticity detecting means provided in at least one of the first reaction tank and the second reaction tank and detecting the chromaticity of the filtered water supplied into the first reaction tank or the second reaction tank; Prepared,
The pump operation instruction means includes
The mixing pump is not operated when the full water detection means detects full water and the chromaticity detected by the filtered water chromaticity detection means is less than a reference chromaticity. The circulating flush toilet system described. A flush toilet, a biological treatment tank that receives sewage from the flush toilet, performs biological treatment, a filtration tank that filters biological treated water treated in the biological treatment tank, and filtered water filtered in the filtration tank The first reaction tank and the second reaction tank to be received, the ozone generation means for generating ozone, the ozone generation means, the first reaction tank and the second reaction tank are connected to each other, and the filtered water is mixed with ozone. The flush toilet comprising: a mixed decoloring unit that generates decolored water through a decoloring reaction; and a storage tank that receives and stores the decolorized water generated by the mixed decoloring unit In the circulating flush toilet system that circulates in
The mixing and decoloring means includes
A mixing pump connected to the ozone generating means for mixing ozone with filtered water;
It is provided between the mixing pump and the first reaction tank and the second reaction tank, and is composed of a circulation pipe through which filtered water mixed with ozone is circulated by operating the mixing pump.
A filtered water supply pipe provided between the filtration tank and the first reaction tank and the second reaction tank;
A filtered water flow path switching means provided in the filtered water supply pipe and capable of switching to a flow path from the filtration tank to the first reaction tank or a flow path from the filtration tank to the second reaction tank;
A circulation flow path provided in the circulation pipe and switchable to an annular circulation flow path connecting the first reaction tank and the mixing pump or an annular circulation flow path connecting the second reaction tank and the mixing pump. Switching means;
A decolorized water supply pipe connected to the circulation pipe and supplying decolorized water in the first reaction tank or the second reaction tank to the storage tank;
A decolorized water supply flow path opening / closing means provided at a connection portion between the decolorized water supply pipe and the circulation pipe, and opening and closing a flow path from the circulation pipe to the decolorized water supply pipe;
First water amount detection means for detecting the amount of water stored in the first reaction tank;
Second water amount detection means for detecting the amount of water stored in the second reaction tank;
First chromaticity detection means for detecting the chromaticity of the water stored in the first reaction tank;
Second chromaticity detection means for detecting the chromaticity of the water stored in the second reaction tank;
First lower limit determination means for determining whether the detected water amount of the first water amount detection means is equal to or less than a lower limit water amount;
First upper limit determination means for determining whether the detected water volume of the first water volume detection means is greater than or less than the upper limit water volume;
Second lower limit determining means for determining whether the detected water amount of the second water amount detecting means is equal to or less than the lower limit water amount;
Second upper limit determination means for determining whether the detected water amount of the second water amount detection means is greater than or less than the upper limit water amount;
First chromaticity determination means for determining whether the detected chromaticity of the first chromaticity detection means is equal to or less than a predetermined chromaticity;
Second chromaticity determination means for determining whether the detected chromaticity of the second chromaticity detection means is equal to or less than a predetermined chromaticity;
A first switching instruction means for instructing the filtered water flow path switching means to open a flow path to the first reaction tank when the first upper limit determination means determines that the amount is less than the upper limit water amount;
A second switching instruction means for instructing the filtered water flow path switching means to open a flow path to the second reaction tank when the second upper limit determination means determines that the amount is less than the upper limit water amount;
A pump operation instruction means for instructing the operation of the mixing pump when the first upper limit determination means or the second upper limit determination means determines that the amount is equal to or greater than the upper limit water amount;
When the first upper limit determining means determines that the amount is equal to or greater than the upper limit water amount, the circulation flow path switching means is configured to switch the flow path of the circulation pipe to the flow path connecting the first reaction tank and the mixing means. First circulation flow path switching control means for instructing
When the second upper limit determining means determines that the amount of water is greater than or equal to the upper limit water amount, the circulation flow path switching means is configured to switch the flow path of the circulation pipe to the flow path connecting the second reaction tank and the mixing means. Second circulation flow path switching control means for instructing
Ozone generation instruction means for instructing the operation of the ozone generation means when the first upper limit determination means or the second upper limit determination means determines that the amount is equal to or greater than the upper limit water amount;
When the first chromaticity determination means or the second chromaticity determination means determines that the predetermined chromaticity is less than or equal to a predetermined chromaticity, the decolorized water supply flow is configured to open a flow path from the circulation pipe to the decolorized water supply pipe. Decolorized water supply flow path opening instruction means for instructing a path opening and closing means;
The first lower limit determination means or the second lower limit determination means is less than the lower limit water amount in a state where the flow path from the circulation pipe to the decolorization water supply pipe is opened by an instruction from the decolorization water supply flow path opening instruction means. Ozone generation stop means for stopping the ozone generation means when it is determined that
The first lower limit determination means or the second lower limit determination means is less than the lower limit water amount in a state where the flow path from the circulation pipe to the decolorization water supply pipe is opened by an instruction from the decolorization water supply flow path opening instruction means. A circulating flush toilet system comprising pump stop means for stopping the mixing pump when it is determined that   The said predetermined chromaticity is adjusted to such an extent that the chromaticity of the decolored water at the time of passing the exit of the said decolorized water supply pipe is decolored to the said target chromaticity. Circulating flush toilet system. An overflow water pipe that is provided between the storage tank and the biological treatment tank, and causes the decolorized water in the storage tank to overflow into the biological treatment tank;
Full water detection means for detecting full water in the storage tank, and when the full water detection means does not detect full water, a decolorization frequency counting means for counting the number of decolorization processes in the first reaction tank and the second reaction tank,
Based on the count value of the decoloring frequency counting means, when the full water detecting means detects full water, the decoloring water supply flow path opening / closing means is opened to set the overflow number for overflowing the decolorizing water in the storage tank. An overflow number setting means,
The decolorized water supply flow path opening instruction means instructs opening of the decolorized water supply flow path opening / closing means according to the number of overflows when the full water detection means detects full water. 10. The circulating flush toilet system according to 10.   12. The circulation type according to claim 11, wherein the overflow count setting means sets the overflow count larger when the count value is equal to or greater than a predetermined count than when the count value is less than the predetermined count. Flush toilet system. An overflow water pipe provided between the decolorization tank and the biological treatment tank, and overflowing the biological treatment tank with decolorized water in the storage tank;
A full water detection means provided in the storage tank for detecting the full water of decolorized water in the storage tank;
A filtered water chromaticity detecting means provided in at least one of the first reaction tank and the second reaction tank and detecting the chromaticity of the filtered water supplied into the first reaction tank or the second reaction tank; Prepared,
The pump operation instruction means includes
The circulation according to claim 9 or 10, wherein when the full water detection means detects full water and the chromaticity detected by the filtered water chromaticity detection means is less than a reference chromaticity, the mixing pump is not operated. Type flush toilet system.

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