JP5878038B2 - Water quality measurement system - Google Patents

Description

  The present invention relates to a water quality measuring system for detecting and counting microorganisms contained in raw water such as environmental water such as rivers and lakes and treated water in each treatment process of water and sewage.

In recent years, the occurrence of waterborne infectious diseases caused by protozoa such as Cryptosporidium, bacteria such as enterohemorrhagic Escherichia coli O157 and Legionella, and microorganisms such as viruses has become a major social problem. In order to prevent the occurrence of waterborne infections, it is important to monitor microorganisms in the water treatment process. Against this background, the patent applicant concentrates the microorganisms contained in the sample water by membrane filtration, collects the microorganisms captured on the membrane by passing the washing liquid through the filtration unit, and fluoresces the collected microorganisms. A water quality measuring device that binds labeled antibodies and detects and counts microorganisms using a fluorescence detector has been proposed (see Patent Document 1).

JP 2010-236861 A

  However, the conventional water quality measuring device has no function of automatically collecting a large amount of sample water required for each measurement. For this reason, when detecting and counting microorganisms using a conventional water quality measurement device, it is necessary for the worker to replenish the water quality measurement device with sample water every time sample water runs out. Detection and counting were not possible.

  The present invention has been made in view of the above problems, and an object thereof is to provide a water quality measurement system capable of continuously detecting and counting microorganisms.

In order to solve the above problems and achieve the object, the water quality measurement system according to the present invention concentrates microorganisms contained in sample water by membrane filtration, collects microorganisms captured on the membrane, and collects the collected microorganisms. Corresponding to a small volume tank to bind a fluorescently labeled antibody and detect and count microorganisms using a fluorescence detector, and to supply raw water to the small volume tank of the water quality measurement device as sample water A raw water supply tank that stores a predetermined small amount of raw water, a raw water buffer tank that stores raw water in order to continuously supply raw water to the raw water supply tank, and a large-capacity tank that the water quality measurement device has as a sample water using precipitation-treated water Precipitation treated water supply tank for storing a predetermined large amount of precipitated treated water, which is larger than a small amount, corresponding to the large capacity tank, A precipitating treated water buffer tank for storing the precipitation treatment water to be supplied, and a turbidimeter to measure the turbidity of the raw water in the raw water buffer tank, depending on the replenishment request from the water quality measuring device, turbidity When the turbidity of the raw water in the raw water buffer tank measured by the meter is less than the predetermined value, a predetermined small amount of raw water stored in the raw water supply tank is supplied as sample water to the small-capacity tank and measured by the turbidimeter. If the turbidity of the raw water in the raw water buffer tank is a predetermined value or more, and an automatic water sampling device for supplying to the large-capacity tank is stored in the precipitation treatment water supply tank, predetermined amounts of precipitation treated water as sample water, the a quality measurement system comprising, water quality measuring device further includes a flat sheet membrane filtration unit and ceramic membrane filter unit, the raw water is fed as sample water to a small volume tank In this case, the microorganisms contained in the sample water are concentrated and detected and counted by the flat membrane filtration unit, and when the treated water is supplied as sample water to the large-capacity tank, the microorganisms contained in the sample water After being concentrated by a ceramic membrane filtration unit and made into a predetermined small amount of sediment-treated water corresponding to a small volume tank and supplied to the small volume tank, it is concentrated by a flat membrane filtration unit to detect and count. It is characterized by being a target .

Water measurement system according to the present invention, in the above invention, the water quality measuring device, characterized in Rukoto to have a mechanism for cleaning the film for each measurement.

  The water quality measurement system according to the present invention is characterized in that, in the above invention, the water quality measurement device outputs information that prompts replacement of the membrane when the number of times of measurement reaches a predetermined number.

  According to the water quality measurement system of the present invention, it is not necessary for the worker to replenish sample water to the water quality measurement device, so that microorganisms can be detected and counted continuously.

FIG. 1 is a block diagram showing a configuration of a water quality measurement system according to an embodiment of the present invention. FIG. 2 is a perspective view showing an appearance of the water quality measuring apparatus shown in FIG. FIG. 3 is a diagram showing an internal configuration of the sign / measurement unit shown in FIG. FIG. 4 is a block diagram showing the configuration of the water quality measuring apparatus shown in FIG. FIG. 5 is a schematic diagram showing the configuration of the filtration unit shown in FIG. FIG. 6 is a perspective view showing an appearance of the automatic water sampling apparatus shown in FIG. FIG. 7 is a block diagram showing a configuration of the automatic water sampling apparatus shown in FIG.

  Hereinafter, a configuration of a water quality measurement system according to an embodiment of the present invention will be described with reference to the drawings.

[Configuration of water quality measurement system]
FIG. 1 is a block diagram showing a configuration of a water quality measurement system according to an embodiment of the present invention. As shown in FIG. 1, the water quality measurement system according to one embodiment of the present invention concentrates microorganisms contained in sample water (raw water or precipitation-treated water) by membrane filtration, and passes the cleaning liquid through a filtration unit. The water quality measuring device 1 that collects the microorganisms captured on the membrane by using the fluorescence detector, detects and counts the microorganisms using a fluorescence detector, and supplies from the water quality measuring device 1 And an automatic water sampling device 100 for supplying sample water to the water quality measuring device 1 as required.

[Configuration of water quality measuring device]
FIG. 2 is a perspective view showing an appearance of the water quality measuring apparatus shown in FIG. FIG. 3 is a diagram showing an internal configuration of the sign / measurement unit shown in FIG. FIG. 4 is a block diagram showing the configuration of the water quality measuring apparatus shown in FIG. FIG. 5 is a schematic diagram showing the configuration of the filtration unit shown in FIG.

  As shown in FIG. 2, the water quality measuring device 1 includes a small volume sample concentrating section (1 L, flat membrane filtration) 2, a large volume sample concentrating section (10 L, ceramic membrane filtration) 3, and a label / measurement section 4. Yes. The small-volume sample concentrating unit 2 separates and concentrates microorganisms from sample water using a flat membrane. As shown in FIG. 4, the small-volume sample concentrating unit 2 includes a small-capacity tank 21 that stores sample water, a cleaning liquid tank 22 that stores cleaning liquid, a filtration unit 23 that includes a flat membrane, and a drainage tank that stores drainage. 24.

  As shown in FIG. 5, the filtration unit 23 has a configuration in which a flat membrane 23c is sandwiched between an upper member 23a and a lower member 23b. The upper member 23a includes a connecting portion 23d connected to a pipe for supplying sample water in the small-capacity tank 21, and pressurization and / or for recovering a suspension containing microorganisms separated from the sample water by air pressure. A connection part 23e connected to the intake pipe and a connection part 23f connected to the pipe L1 for collecting the sample water are provided. The lower member 23 b includes a connection part 23 g connected to a pipe that supplies the cleaning liquid in the cleaning liquid tank 22, and a connection part 23 h connected to a pipe that discharges the drained liquid to the drainage tank 24.

The filtration unit 23 separates microorganisms from the sample water stored in the small capacity tank 21. Microorganisms captured on the flat membrane 23c are recovered by switching the flow path of the suspension by controlling the electromagnetic two-way valve 25 and the electromagnetic three-way valve 26 provided in the pipe L1. Further, a measurement control unit 33 (see FIG. 7) that controls the operation of the entire water quality measuring device 1 supplies the cleaning liquid in the cleaning liquid tank 22 to the flat membrane 23c, and the electromagnetic two-way valve 25 and the electromagnetic provided in the pipe L1. By discharging the cleaning liquid by controlling the three-way valve 26, the flat membrane 23c is cleaned every time measurement is performed. In addition, the measurement control unit 33 urges the worker to replace the flat film 23c every time a predetermined number of measurements are performed.

  As shown in FIG. 4, the large-capacity sample concentrating unit 3 concentrates the precipitated treated water stored in the large-capacity tank 32 using the ceramic membrane 31, and collects the collected precipitated treated water in the small-capacity tank 21. To be injected.

As shown in FIG. 3, the label / measurement unit 4 includes a label unit 4a and a measurement unit 4b. As shown in FIG. 4, the labeling unit 4 a includes a labeling device 42 that binds the fluorescently labeled antibody stored in the labeled antibody tank 41 to the protozoa. The measurement unit 4 b detects and counts microorganisms contained in the sample water using the fluorescence detector 43, and dispenses the detected microorganisms in the collection tank 44. The fluorescence detector 43 includes a light source 45, a flow cell 46, and a detector 47. The sample water flowing through the flow cell 46 is irradiated with laser light having a wavelength of 488 nm, for example, and the fluorescence intensity and scattered light are measured by the detector 47. Thus, microorganisms contained in the sample water are detected and counted.

[Configuration of automatic water sampling device]
FIG. 6 is a perspective view showing an appearance of the automatic water sampling apparatus shown in FIG. FIG. 7 is a block diagram showing a configuration of the automatic water sampling apparatus shown in FIG.

  As shown in FIG. 6, the automatic water sampling apparatus 100 includes a raw water buffer tank 101, a precipitation treated water buffer tank 102, a raw water supply tank 103, a precipitation treated water supply tank 104, and a water collection control unit 105.

As shown in FIG. 7, the raw water buffer tank 101 stores the raw water supplied from the pipe L2. The raw water buffer tank 101 is provided with a water level gauge 106a for measuring the water level of the raw water. The water sampling control section 105, the water level of the raw water that is measured by the water gauge 106a is based on whether a predetermined value or more, it is determined whether it is possible to the operation of the water quality measurement system. If the water level of the raw water that is measured by the water level indicator 106 a is smaller than the predetermined value, the water sampling control unit 105 waits for the operation of the water quality measurement system. During maintenance of the raw water buffer tank 101, the water sampling control unit 105 discharges raw water out of the system by operating a three-way valve 107a provided in the pipe L2.

The sedimentation water buffer tank 102 stores the sedimentation water supplied from the pipe L3. The precipitation treated water buffer tank 102 is provided with a water level meter 106b for measuring the water level of the precipitation treated water. The water sampling control section 105, the water level of the precipitation treatment water measured by the water gauge 106b is based on whether a predetermined value or more, it is determined whether it is possible to the operation of the water quality measurement system. When the water level of the precipitation treated water measured by the water level meter 106b is less than a predetermined value, the water sampling control unit 105 waits for the operation of the water quality measurement system. During maintenance of the precipitation treatment water buffer tank 10 2, water sampling control unit 105 discharges the precipitation treatment water out of the system by operating the three-way valve 107b provided in the pipe L3.

  The raw water supply tank 103 stores the raw water in the raw water buffer tank 101 pumped by the pump 108a through the pipe L4. The raw water supply tank 103 is provided with a stirrer 103a for stirring the raw water, a drain pipe 103b for discharging the overflowed raw water, and a water level meter 103c for measuring the raw water level. The water sampling control part 105 stops operation | movement of a water quality measurement system, when the water level of the raw | natural water measured by the water level meter 103c is more than predetermined value. The water sampling control unit 105 drives the pump 108a when the turbidity of the raw water measured by the turbidimeter 109 is equal to or lower than a predetermined value and the raw water level measured by the water level meter 106a is equal to or higher than the predetermined value. By doing so, raw water is supplied to the raw water supply tank 103.

  The settling water supply tank 104 stores the settling water in the settling water buffer tank 102 pumped by the pump 108b via the pipe L5. The settling water supply tank 104 is provided with a stirrer 104a for stirring the settling water, a drain pipe 104b for discharging the overflowing settling water, and a water level meter 104c for measuring the level of the settling water. The water sampling control part 105 stops operation | movement of a water quality measurement system, when the water level of the precipitation treated water measured by the water level meter 104c is more than predetermined value. In addition, the water sampling control unit 105, when the turbidity of the raw water measured by the turbidimeter 109 is not more than a predetermined value and the water level of the precipitation treated water measured by the water level meter 106b is not less than a predetermined value, Is supplied to the precipitation treated water supply tank 104.

The water sampling control unit 105 is configured by an arithmetic processing device such as a microcomputer and controls the operation of the automatic water sampling device 100 as a whole. Specifically, the water sampling control unit 105 constantly detects the turbidity of the raw water in the raw water buffer tank 101 using the turbidimeter 109, and requests the sample water to be supplied from the measurement control unit 33 of the water quality measuring device 1. Is received, the raw water in the raw water supply tank 103 or the precipitated treated water in the precipitated treated water supply tank 104 is supplied to the water quality measuring device 1 based on the turbidity of the raw water in the raw water buffer tank 101.

For example, when the turbidity of the raw water in the raw water buffer tank 101 is less than a predetermined value (for example, 20 degrees), the water sampling control unit 105 is a pipe connecting the raw water supply tank 103 and the small capacity tank 21 of the water quality measuring device 1. The raw water in the raw water supply tank 103 is supplied into the small capacity tank 21 by opening the electromagnetic two-way valve 110a provided at L6. On the other hand, if the turbidity of the raw water of the raw water buffer tank 101 is a predetermined value or more, water collection control unit 105, connects the large-capacity tank 32 of the precipitation treatment water supply tank 104 and the water quality measuring device 1 pipe By opening the electromagnetic two-way valve 110b provided at L7, the precipitated treated water in the precipitated treated water supply tank 104 is supplied into the large capacity tank 32 .

During normal operation, the electromagnetic two-way valve 110c provided in the pipe L7 is closed, and the large-capacity tank 32 is pressurized by the electromagnetic three-way valve 111 provided in the large-capacity tank 32. Therefore, when the precipitated treated water is supplied from the precipitated treated water supply tank 104, the measurement control unit 33 that controls the operation of the entire water quality measuring device 1 opens the electromagnetic two-way valve 110c and opens the electromagnetic three-way valve 111 to the atmosphere. By opening, the inside of the large-capacity tank 32 is opened to the atmosphere.

  As is clear from the above description, in the water quality measurement system according to one embodiment of the present invention, the automatic water sampling device 100 supplies sample water to the water quality measurement device 1 in response to a replenishment request from the water quality measurement device 1. Therefore, it is not necessary for the worker to replenish the water quality measuring device 1 with sample water, and microorganisms can be detected and counted continuously.

Further, one of but recovery of the microorganisms is increased when the measurement is repeated without replacing the flat membrane 23c, water quality measurement system according to an embodiment of the present invention, the water quality measuring device 1 is flat membrane 23c for each measurement Therefore, the microorganism can be continuously detected and counted with a stable recovery rate without increasing the recovery rate of the microorganism.

  Although the embodiment to which the invention made by the present inventor is applied has been described above, the present invention is not limited by the description and the drawings that form a part of the disclosure of the present invention according to this embodiment. That is, other embodiments, examples, operational techniques, and the like made by those skilled in the art based on the present embodiment are all included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Water quality measuring device 2 Small volume sample concentration part 3 Large volume sample concentration part 4 Labeling / measurement part 4a Labeling part 4b Measurement part 21 Small capacity tank 22 Cleaning liquid tank 23 Filtration unit 24 Drainage tank 31 Ceramic membrane 32 Large capacity tank 41 Labeling Antibody tank 42 Labeling device 43 Fluorescence detector 44 Recovery tank 45 Light source 46 Flow cell 47 Detector 100 Automatic water sampling device 101 Raw water buffer tank 102 Precipitation water buffer tank 103 Raw water supply tank 104 Precipitation water supply tank 105 Precipitation water supply unit 109 Turbidimeter

Claims (3)

Water quality that concentrates microorganisms contained in sample water by membrane filtration, collects microorganisms captured on the membrane, binds fluorescently labeled antibodies to the collected microorganisms, and detects and counts microorganisms using a fluorescence detector A measuring device;
A raw water supply tank for storing a predetermined small amount of the raw water corresponding to the small-capacity tank in order to supply the raw water as a sample water to the small-capacity tank of the water quality measuring device, and the raw water is continuously supplied to the raw water supply tank. A raw water buffer tank for storing the raw water for supply, and a predetermined large amount corresponding to the large capacity tank in order to supply the large capacity tank of the water quality measurement device as the sample water to the treated water as the sample water. Precipitation treatment water supply tank for storing the precipitation treatment water, precipitation treatment water buffer tank for storing the precipitation treatment water to continuously supply the precipitation treatment water to the precipitation treatment water supply tank, and the raw water It has a turbidity meter to measure the turbidity of the raw water in the buffer tank, depending on the replenishment request from the water quality measuring device, which is measured by the turbidimeter If the turbidity of the raw water in the serial raw water buffer tank is lower than the predetermined value, the supplied small volume tank a small amount of the raw water stored in the predetermined in the raw water supply tank as the water sample, measured by the turbidimeter If the turbidity of the raw water in the raw water buffer tank that is is equal to or greater than a predetermined value, the automatic supplying to the large-capacity tank the precipitation treatment water supply predetermined amounts of precipitation treatment water stored in the tank as the sample water A water sampling device;
A water quality measurement system comprising:
The water quality measuring device further comprises a flat membrane filtration unit and a ceramic membrane filtration unit,
When the raw water is supplied as the sample water to the small-capacity tank, the microorganisms contained in the sample water are concentrated by the flat membrane filtration unit to be detected and counted,
When the settling water is supplied as the sample water to the large-capacity tank, microorganisms contained in the sample water are concentrated by the ceramic membrane filtration unit, and a predetermined small amount of sedimentation processing corresponding to the small-capacity tank is performed. A water quality measurement system characterized in that after being supplied as water and supplied to the small-capacity tank, it is concentrated by the flat membrane filtration unit and becomes a target for detection and counting . Water measurement system of claim 1 wherein the water measuring device, characterized in Rukoto to have a mechanism for cleaning the membrane for each measurement. 3. The water quality measurement system according to claim 1, wherein the water quality measurement device outputs information that prompts replacement of the membrane when the number of measurements reaches a predetermined number.

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