JP2010264415A - Water quality control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water quality control system which is effective in unitary control of water quality of two or more septic tanks to which a water quality measuring sensor is assigned, regardless of a form of the septic tank or a kind of the water quality measuring sensor. <P>SOLUTION: A water quality control apparatus 100 includes: a plurality of septic tanks 110; water quality measuring sensors 120 assigned to respective purification processing parts 112; a water quality control center 150 for controlling water quality at the purification processing parts 112; and a communication terminal 130 and a communication line 140 for transmitting a sensor measured value to the water quality control center 150, wherein the water quality control center 150 includes: a data table for storing septic tank identification information capable of identifying each of a plurality of septic tanks 110; a data table for storing information obtained by combining septic tank form information with sensor form information indicating a form of the water quality measuring sensor 120 assigned to each of a plurality of septic tanks 110; and an output processing part for outputting a presumed water quality value calculated by an arithmetic processing part, in association with the septic tank identification information. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a technique for managing the water quality of a plurality of septic tanks by a water quality measurement sensor assigned to each purification processing unit of the plurality of septic tanks.

Conventionally, some septic tanks that treat treated water such as domestic wastewater discharged from ordinary households and sewage such as industrial wastewater have water quality measurement sensors installed to manage the water quality of the purification treatment unit. . For example, Patent Document 1 below discloses a technique for detecting residual chlorine contained in water after disinfection treatment using a water quality sensor in a septic tank. By the way, when managing the water quality of this type of septic tank, a water quality management system capable of centrally managing the water quality of a plurality of septic tanks equipped with water quality measurement sensors is required. In that case, even if the types of multiple septic tanks are different and the types of water quality measurement sensors combined with the septic tanks are different for each septic tank, multiple septic tanks are used regardless of the types of septic tanks and the types of water quality measurement sensors. It is necessary to manage the quality of water in a unified manner.
JP-A-4-235798

  Therefore, the present invention has been made in view of the above points, and manages the water quality of a plurality of septic tanks to which a water quality measurement sensor is assigned, irrespective of the type of the septic tank and the type of the water quality measurement sensor. The objective is to provide an effective water quality management system.

  The present invention is configured to solve the above problems. The present invention can be applied to a water quality management system that manages the quality of water in a plurality of septic tanks that typically treat treated water such as domestic wastewater discharged from ordinary households and sewage such as industrial wastewater. Is done.

  A water quality management system according to the present invention is measured by a plurality of septic tanks that contain a purification treatment unit that performs purification treatment of water to be treated, a water quality measurement sensor that is combined with each of the purification treatment units of the plurality of septic tanks, and a water quality measurement sensor. And a single water quality management device that manages the water quality of the purified purification processing unit, and a transmission device that transmits the sensor measurement value measured by the water quality measurement sensor to the water quality management device. Here, regarding the water quality measurement sensor assigned to the purification processing unit of each septic tank, the water quality measurement sensor is appropriately selected from one or a plurality of water quality measurement sensors installed in the purification processing unit. It is possible to be assigned. Here, the “purification treatment unit” is defined as a water treatment region group composed of one or a plurality of water treatment regions that are formed before the water to be treated in each septic tank flows out of the tank. As the transmission apparatus, a configuration is typically used in which a communication terminal is combined with at least one communication line of communication lines such as the Internet, a mobile phone network, a public telephone line, and a radio used for data communication of the communication terminal. be able to.

  In particular, the water quality management device includes a first data table, a second data table, a database including a third data table and a fourth data table, and an arithmetic processing unit and an output processing unit. . Each data table included in the database is also referred to as a “table” or a “data group” in which a plurality of data are arranged in combination.

The first data table is configured as a data table that stores at least septic tank identification information that can identify each of the plurality of septic tanks. As the “septic tank identification information” referred to here, individual information (fixed number or the like) of the septic tank that can be specified in a plurality of septic tanks is typically used. The second data table stores at least combination information obtained by combining the septic tank type information indicating the respective types of the plurality of septic tanks and the sensor type information indicating the type of the water quality measurement sensor allocated to each of the plurality of septic tanks. Configured as a data table. As the “septic tank type information” here, typically, information indicating a processing method or a combination of processing methods in the septic tank, information indicating processing performance, information indicating the size of the septic tank and a human tank, and the like are used. In addition, as the “sensor type information” here, typically, individual information (fixed number or the like) of the water quality measurement sensor capable of specifying the type of the water quality measurement sensor and the target water quality is used. The third data table is configured as a data table that stores at least combination information of the septic tank type information and the sensor type information in association with the septic tank identification information. The fourth data table stores at least conversion formula information that can convert sensor measurement values relating to the water quality measurement sensor into water quality values in association with combination information of the septic tank type information and sensor type information or septic tank identification information. Configured as That is, the conversion formula information used for converting the sensor measurement value into the water quality value is specified according to the combination information of the septic tank type information and the sensor type information. When the types of water quality measurement sensors assigned to a plurality of septic tanks are all the same, the sensor type information is omitted, the combination information is replaced with the septic tank type information, and the conversion formula information is specified according to the septic tank type information. It can also be done. Further, when the types of the plurality of septic tanks are all the same, the septic tank type information may be omitted, and the combination information may be replaced with the sensor type information so that the conversion type information is specified only from the sensor type information.
With regard to the “sensor measurement value relating to the water quality measurement sensor” here, the current value or voltage value input from the water quality measurement sensor may be used as the sensor measurement value, or the current value input from the water quality measurement sensor. Alternatively, a value derived from the voltage value may be used. The “water quality value” mentioned here includes BOD (biochemical oxygen demand), turbidity, transparency, SS (suspended suspended solids), pH, DO (dissolved oxygen), ultraviolet (UV) absorbance. Etc. are included.

  The arithmetic processing unit has a function of calculating the estimated water quality value by applying the sensor measurement value measured by the water quality measurement sensor to the conversion formula information stored in the fourth data table of the database. The output processing unit has a function of outputting the estimated water quality value calculated by the calculation processing unit in correspondence with the septic tank identification information.

  According to the above configuration of the water quality management system according to the present invention, the water quality of a plurality of septic tanks to which water quality measurement sensors are assigned can be determined in a single water quality management device regardless of the septic tank type of the septic tank or the sensor type of the water quality measurement sensor. Centralized management is possible. In addition, it is not necessary to store conversion type information in the water quality measurement sensor itself, the cost of the water quality measurement sensor can be reduced, and information regarding the water quality of a plurality of septic tanks is collectively processed in a single water quality management device Therefore, it is possible to reduce the cost required for the construction of a water quality management system.

  Moreover, in the water quality management system of the further form concerning this invention, it is preferable that the said water quality management apparatus is a structure further equipped with an update process part. The update processing unit newly converts the conversion formula information already stored in the fourth data table of the database based on the water quality analysis result of the water sampled in the purification processing unit to which the water quality measurement sensor is assigned. It has a function to update to formula information. The arithmetic processing unit calculates the estimated water quality value by applying the sensor measurement value measured by the water quality measurement sensor to the conversion formula information newly updated by the update processing unit in the fourth data table. According to such a configuration, it is possible to improve the reliability of the water quality value derived from the sensor measurement value of the water quality measurement sensor by always using new conversion formula information.

  Moreover, it is preferable that the water quality management system of the further form concerning this invention is a structure further equipped with a memory | storage process part. The storage processing unit has a function of storing information indicating the date of water sampling in the purification processing unit and information indicating that the water was collected in the purification processing unit on the date of water sampling. The fifth data table here may be included in a database configured separately from the database including the first to fourth data tables described above, or includes the first to fourth data tables. It may be included in the database and provided separately from these first to fourth data tables, or may be configured to be included in any of the first to fourth data tables. And the information memorize | stored in this memory | storage process part is transmitted to a water quality management apparatus via a transmission apparatus, and the 5th of database is included with the water quality analysis result of the water sampled in the said purification process part at the said water sampling date. Stored in a data table. According to such a configuration, it is possible to appropriately correspond the water quality analysis result of the water sampled on the predetermined sampling date and the sensor measurement value measured by the water quality measurement sensor on the sampling date. .

  As described above, according to the present invention, the water quality management system effective for centrally managing the water quality of a plurality of septic tanks to which water quality measurement sensors are assigned, regardless of the type of the septic tank and the type of the water quality measurement sensor. It became possible to build.

  Below, the structure etc. of the water quality management system of one Embodiment in this invention are demonstrated based on drawing. In addition, this Embodiment demonstrates the water quality management system which consists of a some septic tank which performs the purification process of the waste_water | drain (to-be-processed water) discharged | emitted from a general household.

  An outline of a water quality management system 100 which is an embodiment of a “water quality management system” according to the present invention is shown in FIG. As shown in FIG. 1, the water quality management system 100 of this embodiment includes at least a plurality (three in FIG. 1) of septic tanks 110, water quality measurement sensors 120, communication terminals 130, communication lines 140, and a water quality management center 150. It is set as the composition including. Furthermore, it can also be set as the water quality management system 100 including the water quality test | inspection part 170 mentioned later.

  Each septic tank 110 has a septic tank body 111 formed in a tank shape, and a septic processing section 112 is accommodated in the septic tank body 111. This purification process part 112 is prescribed | regulated as a water treatment area | region group which consists of one or several water treatment area | regions made until the to-be-processed water of each purification tank flows out of a tank. Regarding the typical configuration of the purification treatment unit 112, the purification treatment unit 112 separates impurities contained in the treated water from the treated water using solid-liquid separation means such as an inflow baffle (not shown). Preference is given to the contaminant removal tank that performs the treatment, the foam separation tank that performs the process of separating the foam from the treated water, the anaerobic filter bed tank that anaerobically treats (reduces) the organic pollutant in the treated water, and the organic pollutant in the treated water. A contact aeration tank that performs gas treatment (oxidation), a filtration tank that filters suspended substances in the treated water, a precipitation tank that precipitates and removes suspended substances in the treated water, and retains the treated water for a certain period of time. It is configured to include one or more of a flow rate adjusting unit having a flow rate adjusting function for adjusting the residence time in the tank, a disinfection processing unit for disinfecting water to be treated with a disinfectant supplied from a disinfecting device, and the like. Is preferred. The water that has been purified in the purification processing unit 112 flows out of the septic tank body 111. In this case, each septic tank 110 may be configured as a septic tank that discharges the water that has flowed out of the septic tank body 111 as it is, or the water that has flowed out of the septic tank body 111 is reused as toilet or water for watering. It may be configured as a water recycling device. The plurality of septic tanks 110 here correspond to “a plurality of septic tanks” in the present invention, and the purification processing units 112 accommodated in the respective septic tanks 110 are the “purification processing units for performing the purification process of water to be treated” in the present invention. Is equivalent to.

  The water quality measurement sensor 120 is configured as a water quality measurement sensor assigned to each septic tank 110. The water quality measurement sensor 120 typically has BOD (biochemical oxygen demand), turbidity, transparency, SS (suspended suspended solid), pH, DO (dissolved oxygen), ultraviolet (UV) absorbance, and the like. It is comprised as a water quality measurement sensor which performs the measurement of one or more. In the present embodiment, waste water to be treated in each tank and water flowing in the treatment process for treating the waste water are referred to as “water to be treated” or “water”. The water quality measurement sensor 120 here corresponds to the “water quality measurement sensor” in the present invention.

  The communication terminal 130 is connected to the water quality measurement sensor 120, and transmits the water quality information continuously or periodically measured by the water quality measurement sensor 120 to the server 160 of the water quality management center 150 via the communication line 140. Configured as The communication line 140 is configured by at least one of communication lines such as the Internet, a mobile phone network, a public telephone line, and a radio used for data communication of the communication terminal 130. Water quality information continuously or periodically measured by the water quality measurement sensor 120 is transmitted to the server 160 of the water quality management center 150 via the communication terminal 130 and the communication line 140, and stored in the server 160. It is comprised so that. The communication terminal 130 and the communication line 140 here constitute a “transmission apparatus” in the present invention.

  On the other hand, in the water quality inspection unit 170, an analyst performs a water quality analysis of water collected from the purification processing unit 112 of the septic tank 110 at the time of legal inspection or the like. The water quality analysis result of the water analyzed by the water quality inspection unit 170 is stored in the server 160 of the water quality management center 150.

  Here, FIG. 2 is referred to regarding the specific configuration of the server 160 provided in the water quality management center 150. FIG. 2 shows a system configuration of the server 160 in FIG. As shown in FIG. 2, the server 160 of this embodiment includes at least a database 160a, an arithmetic processing unit 166, an output processing unit 167, and an update processing unit 168. The water quality management center 150 or the server 160 here is a single water quality management device that manages the water quality of the purification treatment unit 112 measured by the water quality measurement sensors 120 of the plurality of septic tanks 110. Is equivalent to. The database 160a of the water quality management center 150 includes at least a property table 161, a septic tank / sensor combination table 162, a conversion formula table 163, a BOD input table 164, and a BOD output table 165. Each data table included in the database 160a is also referred to as a “table” or a “data group” in which a plurality of data is combined. The server 160 (water quality management center 150) is also referred to as a “remote monitoring device” that monitors the water quality at a remote location separated from the plurality of septic tanks 110.

  The property table 161 is configured as a data table that stores septic tank identification information A, septic tank type information B, and sensor type information C that can identify each of a plurality of septic tanks in association with the septic tank identification information A. Here, as the septic tank identification information A, individual information (fixed number or the like) of the septic tank, which can be specified in a plurality of septic tanks, is typically used. The property table 161 here constitutes the “first data table” and the “third data table” in the present invention.

The septic tank / sensor combination table 162 includes septic tank type information B indicating the types of the plurality of septic tanks, and sensor type information C indicating the type of the water quality measurement sensor 120 assigned to each of the plurality of septic tanks. The data table is stored together with combination information D defined by the combination of B and sensor type information C. Here, as the septic tank type information B, typically, information on the product name of the septic tank, information indicating the processing method of the septic tank or a combination of processing methods, information indicating the processing performance of the septic tank, the size of the septic tank, and the human tank Information or the like indicating is used. As the processing method of the septic tank type information B, for example, the presence / absence of a filtration tank for filtering a suspended matter in the water to be treated, the presence / absence of a flow rate adjusting unit having a flow rate adjusting function for adjusting a residence time, or the like can be used. Further, as the processing performance of the septic tank type information B, for example, a BOD removal type, a BOD and nitrogen removal type, or the like can be used. As the sensor type information C, individual information (fixed number or the like) of the water quality measurement sensor that can typically specify the type of the water quality measurement sensor and the target water quality is used.
When the types of the water quality measurement sensors 120 assigned to a plurality of septic tanks are all the same, the sensor type information C can be omitted and the combination information D can be defined only from the septic tank type information B. Further, when the types of the plurality of septic tanks are all the same, the septic tank type information B can be omitted, and the combination information D can be defined only from the sensor type information C. The septic tank / sensor combination table 162 here constitutes the “second data table” in the present invention.

  The conversion formula table 163 is configured as a data table that stores conversion formula information E that can convert sensor measurement values related to the water quality measurement sensor 120 into water quality values in association with the combination information D. That is, according to the combination information D of the septic tank type information B and the sensor type information C, conversion formula information used for converting the sensor measurement value into the water quality value is specified. Further, in the conversion formula table 163, conversion formula information E that can convert the sensor measurement value relating to the water quality measurement sensor 120 into a water quality value can be stored in correspondence with the septic tank identification information A instead of the combination information D. The conversion formula table 163 here corresponds to the “fourth data table” in the present invention.

  The BOD input table 164 is configured as a database that stores sensor measurement values relating to the water quality measurement sensor 120 and water quality analysis values obtained by actually collecting and analyzing the water at that time. The BOD input table 164 here corresponds to the “fifth data table” in the present invention. The tables 161 to 164 may have a configuration in which all or some of the tables are integrated.

  The arithmetic processing unit 166 has a function of calculating an estimated BOD (estimated water quality value) by applying the sensor measurement value actually measured by the water quality measurement sensor 120 to the conversion formula information E stored in the conversion formula table 163. Have. The arithmetic processing unit 166 corresponds to the “arithmetic processing unit” in the present invention.

  The output processing unit 167 has a function of outputting the estimated water quality value calculated by the calculation processing unit 166 in association with the septic tank identification information A. Thereby, the estimated water quality value corresponding to the septic tank identification information A is output by the output processing unit 167. The output processing unit 167 corresponds to the “output processing unit” in the present invention. The output mode of the output processing unit 167 here is not only the mode in which the estimated water quality value corresponding to the septic tank identification information A is displayed and output on the display screen, or the mode in which printing is output by the printing device, but also the septic tank identification. A mode in which the estimated water quality value corresponding to the information A is output to the data table so as to be stored in the predetermined data table is widely included. In the present embodiment, the estimated BOD calculated by the calculation processing unit 166 is converted into a data table in the BOD output table 165.

  The update processing unit 168 further converts the conversion formula information E already stored in the conversion formula table 163 into new conversion formula information based on the water quality analysis result of the water sampled at the site where the water quality measurement sensor 120 is installed. It has a function to update to. The update processing unit 168 corresponds to the “update processing unit” in the present invention. In the present embodiment, the estimated BOD calculated by the calculation processing unit 166 is updated in the BOD output table 165. Note that each of the arithmetic processing unit 166, the output processing unit 167, and the update processing unit 168 may be a separate component in the server 160, or may be a combined component. Note that the update processing unit 168 can be omitted as appropriate.

  3 to 7 are referred to for specific examples of the tables 161 to 165. 3 to 7, the property table 161 of the present embodiment, the septic tank / sensor combination table 162 of the present embodiment, the conversion formula table 163 of the present embodiment, the BOD input table 164 of the present embodiment, and A BOD output table 165 of the present embodiment is shown.

  In the property table 161 shown in FIG. 3, as information including the septic tank identification information A, the septic tank model information B, and the sensor model information C, the property ID, property name, address, contact information, number of people used, human tank, use regarding each septic tank The start date, septic tank type, sensor type, and the like are stored. The property ID here corresponds to “septic tank identification information” in the present invention.

  In the septic tank / sensor combination table 162 shown in FIG. 4, a combination ID, a septic tank model, a sensor model, and the like are stored as information including the septic tank model information B, sensor model information C, and combination information D described above. In FIG. 4, for example, when the septic tank type of the septic tank 110 is “A type” and the sensor type of the water quality measurement sensor 120 is “T01”, the combination ID is defined as “1”. The combination ID, the septic tank model, and the sensor model here correspond to “combination information”, “septic tank model information”, and “sensor model information” in the present invention, respectively. When the water quality measurement sensors 120 assigned to a plurality of septic tanks have the same model, the sensor model can be omitted, and the combination ID can be defined only from the septic tank model. Further, when the types of the plurality of septic tanks are all the same, the septic tank model can be omitted, and the combination ID can be defined only from the sensor model. Further, the combination information D of the present embodiment is information that is defined and grouped (or classified) by the combination of the septic tank type information B and the sensor type information C, and is also referred to as “group information” or “classification information”. It is called. The combination ID of the present embodiment is an ID that relates to the combination information D and defines the conversion formula, and is also referred to as “group ID” or “classification ID”, and further “conversion formula ID”. .

  In addition, although said combination information D is prescribed | regulated by the combination of septic tank type information B and sensor type information C, if this combination pattern differs, combination information D does not necessarily differ, and different combination information D is different. In some cases, the same combination information D may be given. For example, even if it is another type of septic tank, if the processing method and processing performance of the septic tank are similar and it is appropriate to use the same conversion formula information E, the septic tank type information B and sensor Even when the combination with the model information C is different, the same combination information D can be given.

  In the conversion formula table 163 shown in FIG. 5, the combination ID, conversion formula (“conversion formula” or “regression formula” is used as information including the conversion formula information E that can convert the sensor measurement value related to the water quality measurement sensor 120 into the water quality value. The coefficients a and b in the conversion equation are stored. In FIG. 5, for example, when the combination ID is “1”, the conversion formula is “Y = aX + b”, the coefficient a of the conversion formula is “0.452”, and the coefficient (intercept) of the conversion formula is B) is set to “0.846”. These coefficients a and b are derived by linearly approximating the relationship between the sensor measurement value and the BOD already stored in the conversion formula table 163. The conversion equation and the coefficients a and b in the conversion equation here correspond to “conversion equation information” in the present invention.

  In the BOD input table 164 shown in FIG. 6, the property ID, combination ID, date and time, sensor measurement value, and BOD are stored. Here, regarding the sensor measurement value and the BOD, the value measured by the water quality measurement sensor 120 at a predetermined timing is set as the sensor measurement value, and the water quality analysis value of the water sampled at the same timing is set as the BOD. In FIG. 6, for example, when the property ID and the combination ID are “1” and the sensor measurement value by the water quality measurement sensor 120 is “5”, the BOD is “3.0”. The water quality analysis value is not an analysis by a water quality sensor in water, but a water quality analysis value by, for example, an official method of an environmental measurement certification office.

  In the present embodiment, water sampling is performed in the purification processing unit 112 in which the water quality measurement sensor 120 is installed between the water quality measurement sensor 120 and the communication terminal 130 or in the water quality measurement sensor 120 itself or the communication terminal 130 itself. It is preferable to provide a storage processing unit 131 (also referred to as “logger”) that stores information indicating the date and time and information indicating that the water was collected in the purification processing unit 112 at the time of water sampling (FIG. 1). reference). The information stored in the storage processing unit 131 is transmitted to the BOD input table 164 via the communication line 140, and together with the BOD water quality analysis result of the water sampled in the purification processing unit 112 at the time of sampling, the BOD It is stored in the input table 164. The storage processing unit 131 here corresponds to a “storage processing unit” in the present invention.

  Specifically, the storage processing unit 131 is activated when a manually operable input device (typically an operation switch or operation button) connected to the communication terminal 130 is operated during sampling. The storage processing unit 131 is typically attached to the communication terminal 130 or an arbitrary device to which the water quality measurement sensor 120 is connected. At this time, information indicating the date and time of water sampling and information indicating that water was collected in the purification processing unit 112 on the date and time of water sampling, that is, operation information of the input device is temporarily stored in the storage processing unit 131 and then communicated. The data is transmitted to the server 160 of the water quality management center 150 via the line 140, and stored in the BOD input table 164 corresponding to the water quality analysis value of the BOD. At this time, the operation information of the input device may be transmitted to the server 160 of the water quality management center 150 via the communication line 140 separately from the sensor measurement value measured by the water quality measurement sensor 120 at the time of sampling. Alternatively, it may be transmitted to the server 160 of the water quality management center 150 via the communication line 140 together with the sensor measurement value measured by the water quality measurement sensor 120 at the time of sampling.

  According to such a configuration, it is possible to appropriately correspond the water quality analysis result of the water sampled at a predetermined sampling date and the sensor measurement value measured by the water quality measurement sensor 120 at the sampling date and time. Become. If necessary, the storage processing unit 131 may be omitted as appropriate, and at least the operation information of the input device may be directly transmitted to the server 160 of the water quality management center 150 via the communication line 140. Good.

  In the BOD output table 165 shown in FIG. 7, the property ID, combination ID, date and time, sensor measurement value, and estimated BOD are stored. The estimated BOD is an estimated value derived from the sensor measurement value based on the conversion formula in the conversion formula table 163. In FIG. 7, for example, when the property ID and the combination ID are “1” and the sensor measurement value by the water quality measurement sensor 120 is “19”, the estimated BOD converted by the conversion formula is “9.4”. The The estimated BOD is preferably derived from sensor measurement values taken periodically from the water quality measurement sensor 120 and stored in addition to the BOD output table 165.

  Here, a procedure for updating the estimated BOD in the BOD output table 165 will be described with reference to FIGS. 8 shows a state of linear approximation between the sensor measurement value and the BOD before and after the update of the conversion formula table, and FIG. 9 shows the BOD after the BOD input table 164 of FIG. 6 is updated. An input table 164a is shown. FIG. 10 shows the conversion formula table 163a after the conversion formula table 163 of FIG. 5 is updated. Further, FIG. 11 shows the BOD output table 165a after the BOD output table 165 of FIG. 7 is updated.

  In the present embodiment, when the estimated BOD is updated in the BOD output table 165, a combination of the sensor measurement value and the BOD is newly added to the septic tank having the property ID “5” and the combination ID “1”. Think. In the example shown in FIG. 9, regarding the water quality at 14:00 on February 25, 2008, “40” which is the sensor measurement value measured by the water quality measurement sensor 120 and the water quality analysis value of the water sampled at the time of measurement. A relationship with “20” which is (BOD) is added. Therefore, the relationship between the sensor measurement value and the BOD as a whole is added to the relationship between the sensor measurement value and the BOD already stored in the conversion formula table 163 and a further relationship between the sensor measurement value and the BOD is added. Is approximated to a straight line by a known method.

  For this linear approximation, reference is made to FIG. In FIG. 8, the relationship between the sensor measurement value and BOD before the update is indicated by ◯: plot P1 and approximate line L1, while the relationship between the sensor measurement value and the BOD after update is Δ: plot P2 and approximation line L2. Indicated. When the coefficient of the updated approximate straight line L2 is derived, for example, the coefficient a is set to “0.484” and the coefficient b is set to “0.476”. Accordingly, the conversion formula table 163a in FIG. 10 is newly stored by updating the coefficients a and b when the combination ID is “1” in the conversion formula table 163 in FIG. Further, by using the updated conversion formula table 163a, an estimated BOD is derived based on the sensor measurement value. For example, regarding the water quality at 15:00 on April 10, 2008, before the update, the estimated BOD when the sensor measurement value was “19” was “9.4” as shown in FIG. After the update, as shown in FIG. 11, the estimated BOD when the sensor measurement value is “19” is set to “9.7”.

  As described above, according to the water quality management system 100 of the present embodiment, the water quality of a plurality of septic tanks can be centrally managed by the server 160 of the water quality management center 150. Further, even if the type of the water quality measurement sensor 120 changes, it is reasonable because it can be handled by changing only the conversion formula information E stored in the conversion formula table 163 of the server 160. Further, by adopting a configuration in which the conversion formula information E stored in the conversion formula table 163 is constantly updated to the latest conversion formula information, the reliability of the estimated BOD derived from the sensor measurement value of the water quality measurement sensor 120 is improved. It is effective to plan. In addition, it is not necessary to store the conversion type information E in the water quality measurement sensor 120 itself, so that the cost of the water quality measurement sensor 120 can be reduced, and information regarding the water quality of the plurality of septic tanks 110 can be collectively collected in a single water quality management device. Therefore, it is possible to reduce the cost required for the construction of a water quality management system.

In addition, according to the water quality management system 100 of the present embodiment, the accuracy of water quality prediction is increased. Therefore, when maintaining and managing a large number of septic tanks, the accuracy of maintenance management is improved and the quality is improved. Furthermore, since the accuracy of abnormality prediction is improved, it is possible to contribute to the improvement of the water environment. In addition, in the water quality analysis by the official method, it takes about 5 days to measure BOD, and if there is an abnormality in the treatment performance of the septic tank, it will be dealt with at the end of the period. By constantly monitoring the treatment performance of the septic tank, the estimated BOD from the water quality sensor can be grasped accurately and instantaneously, so it is possible to cope with the deterioration of the treatment performance of the septic tank, and the water environment The negative effects can be minimized. Furthermore, the response work is easier than when dealing with a situation in which the situation has already deteriorated, and it is possible to reduce the maintenance cost by reducing the field response work in the event of an abnormality.
In addition, using this system, if it is clear that the target water quality (for example, BOD: 20) has been cleared based on the estimated water quality value without performing the water quality analysis, the water quality analysis by the official method is appropriately performed. It is possible to reduce the water quality analysis cost by reducing the number of times of water quality analysis and reducing unnecessary water quality analysis.
In addition, using this system, not only septic tank maintenance management contractors who have septic tank maintenance management experience and expertise, but also septic tank managers who are not directly engaged in septic tank maintenance management, such as septic tank maintenance personnel in municipalities, for example. Even if it exists, the abnormality determination of a septic tank can be performed simply, the speed-up at the time of abnormality can be speeded up, and the effect of being freed from the complexity of daily work is acquired.

[Other Embodiments]
In addition, this invention is not limited only to said embodiment, A various application and deformation | transformation can be considered. For example, each of the following embodiments to which the above embodiment is applied can be implemented.

  In the water quality management system 100 of the above embodiment, an example in which the water quality measurement sensor 120 performs water quality measurement related to BOD has been described. However, water quality other than BOD, for example, turbidity, transparency, SS (suspended suspended matter amount), pH The present invention can be similarly applied to the case of measuring water quality such as DO (dissolved oxygen) and ultraviolet (UV) absorbance.

  Moreover, in the water quality management system 100 of the said embodiment, although the case where one water quality measurement sensor 120 was installed in the purification process part 112 of each septic tank 110 was described, in this invention, one or several water quality measurement sensors are installed. It is possible to assign to the purification processing unit.

It is a figure which shows the outline | summary of the water quality management system 100 which is one Embodiment of the "water quality management system" concerning this invention. It is a figure which shows the system configuration | structure of the server 160 in FIG. It is a figure which shows the property table 161 of this Embodiment. It is a figure which shows the septic tank and sensor combination table 162 of this Embodiment. It is a figure which shows the conversion type | formula table 163 of this Embodiment. It is a figure which shows the BOD input table 164 of this Embodiment. It is a figure which shows the BOD output table 165 of this Embodiment. It is a figure which shows the mode of the linear approximation of the sensor measured value and BOD before and behind the update of a conversion type table. It is a figure which shows the BOD input table 164a after the BOD input table 164 of FIG. 6 was updated. It is a figure which shows the conversion formula table 163a after the conversion formula table 163 of FIG. 5 was updated. It is a figure which shows the BOD output table 165a after the BOD output table 165 of FIG. 7 was updated.

DESCRIPTION OF SYMBOLS 100 ... Water quality management system 110 ... Septic tank 111 ... Septic tank main body 112 ... Purification processing part 120 ... Water quality measurement sensor 130 ... Communication terminal 131 ... Memory processing part 140 ... Communication line 150 ... Water quality management center 160 ... Server 160a ... Database 161 ... Property table 162 ... Septic tank / sensor combination table 163 ... Conversion table 164 ... BOD input table 165 ... BOD output table 166 ... Operation processing unit 167 ... Output processing unit 168 ... Update processing unit 170 ... Water quality inspection unit
A ... Septic tank identification information B ... Septic tank model information C ... Sensor model information D ... Combination information E ... Conversion formula information

Claims (3)

A plurality of septic tanks that contain a purification treatment unit that purifies the treated water;
A water quality measurement sensor assigned to each of the purification treatment units of the plurality of septic tanks;
A single water quality management device for managing the water quality of the purification treatment unit measured by the water quality measurement sensor;
A transmission device for transmitting the sensor measurement value measured by the water quality measurement sensor to the water quality management device;
A water quality management system comprising:
The water quality management device includes a database, an arithmetic processing unit, and an output processing unit,
The database is
A first data table storing septic tank identification information capable of identifying each of the plurality of septic tanks;
A second data table for storing combination information obtained by combining septic tank type information indicating the respective types of the plurality of septic tanks and sensor type information indicating the type of the water quality measurement sensor assigned to each of the plurality of septic tanks. When,
A third data table for storing the combination information in association with the septic tank identification information;
A fourth data table for storing conversion formula information capable of converting a sensor measurement value related to the water quality measurement sensor into a water quality value in association with the combination information or the septic tank identification information;
The arithmetic processing unit calculates an estimated water quality value by applying a sensor measurement value transmitted by the transmission device by the water quality measurement sensor to the conversion formula information stored in the fourth data table of the database. Is a configuration to
The said output process part is a structure which outputs the estimated water quality value calculated by the said calculation process part corresponding to the said septic tank identification information, The water quality management system characterized by the above-mentioned. The water quality management system according to claim 1,
The said water quality management apparatus is the said conversion type | formula information already memorize | stored in the said 4th data table of the said database based on the water quality analysis result of the water sampled in the purification process part to which the said water quality measurement sensor was allocated. Is further updated to a new conversion formula information,
The calculation processing unit calculates an estimated water quality value by applying the sensor measurement value measured by the water quality measurement sensor to the conversion formula information newly updated by the update processing unit in the fourth data table. Water quality management system characterized by that. The water quality management system according to claim 2,
A storage processing unit that stores information indicating the date of water sampling in the purification processing unit and information indicating that the water was sampled in the purification processing unit on the date of water sampling;
The information stored in the storage processing unit is transmitted to the water quality management device via the transmission device, and together with the water quality analysis result of the water sampled in the purification processing unit on the sampling date, the first of the database. 5. A water quality management system, characterized in that it is stored in a data table of 5.

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