JPH0712802A - Water quality monitoring device and water quality monitoring method - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a simple water quality monitoring device that is economical and easy to operate, which enables severe and advanced monitoring of water quality to confirm safety. This water quality monitoring device has a light-transmitting bottom surface 3 into which waste water is introduced, and a light amount determination sensor 8 arranged outside the bottom surface 3 so as to face the bottom surface 3, and faces from the opening to the bottom. The test water tank 1 for breeding the kawaina 28 and the fish 27, and the sensor controller 39 for receiving the light amount signal from the light amount discriminating sensor 8 to judge the water quality of the waste water are provided. [Effect] When the quality of the waste water deteriorates, the Kawana 28 drops and the light reaching the sensor 8 decreases, and the controller 39
Gives an alarm. Water quality deterioration can be detected quickly and easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water quality monitoring device and a water quality monitoring method for monitoring, for example, the quality of wastewater after wastewater treatment from a semiconductor factory or a liquid crystal factory, and particularly to the quality of discharged water from a factory or the like. The present invention relates to a water quality monitoring device and a water quality monitoring method for biologically comprehensively monitoring the degree of environmental pollution.

[0002]

2. Description of the Related Art Conventionally, for example, as a method and apparatus for monitoring the quality of treated water from a wastewater treatment facility using living organisms, a small-scale water tank is simply provided and There were only things such as raising carps and goldfish to monitor the quality of treated water.

Further, in a water purification plant, aquatic animals such as salmon, carp, dace and sardine are bred in raw water, and when poisonous substances are mixed, the aquatic animals behave abnormally or die. It is used to monitor the quality of raw water. And recently, the image information of these fishes is converted into an electric signal, image processing is performed, and the water quality abnormality is monitored through the fishes by the monitoring device.

By the way, high-concentration toxic wastewater discharged from existing semiconductor factories and liquid crystal factories, for example, developer-containing effluent, contains 200% of tetramethylammonium hydroxide (hereinafter abbreviated as TMAH) showing biotoxicity.
It contains 0 to 10000 ppm. Therefore, the wastewater containing the developer will adversely affect organisms such as fish unless the wastewater is reliably treated to a high degree. Therefore, when treating developer-containing wastewater generated in semiconductor factories and liquid crystal factories in-house, some conventional treatment technologies are combined according to the quality of the above-mentioned wastewater, and the wastewater is subjected to chemical treatment, physical treatment and biological treatment. , The above wastewater is combined with the wastewater of other systems and discharged outside the factory. As a method of treating the above wastewater,
Chemical treatment methods such as neutralization, reaction, coagulation, biofilm, catalytic oxidation, activated sludge, special microorganisms, and physical treatment methods such as precipitation, filtration and adsorption are used.

On the other hand, highly concentrated toxic waste water discharged from various industrial facilities, semiconductor factories, liquid crystal factories, etc. is discharged after being subjected to physical treatment, chemical treatment and biological treatment. When monitoring the quality of the wastewater after this treatment, especially in semiconductor factories and liquid crystal factories, there are many types of chemical substances used, so the quality of the treated water should be measured for each chemical substance. If so, there is a problem that it takes a long time to judge the water quality and smooth water quality control cannot be performed.

Therefore, from the viewpoint of countermeasures against chemical hazards in semiconductor factories and liquid crystal factories, all items that biologically affect discharged water must be reliably treated.
Overall, there is a need for a water quality monitoring method that can quickly and economically monitor whether the quality of discharged water is abnormal.

[0007] Today, a variety of chemical substances are used in semiconductor factories and liquid crystal factories. Whether or not a trace amount of these chemical substances is mixed in discharged water can be determined more quickly and biologically. It is important to check the above to ensure the safety of the above factory. In other words, ensuring the safety of factory wastewater is the social responsibility of companies that discharge wastewater into the community. Especially when there is a water source (water treatment plant) downstream of the factory, ensuring the safety of drainage is of utmost importance.

As described above, the environmental measures in the above factories and the like have become more and more important with the times, and especially from the viewpoint of chemical hazards, in the era of comprehensive review including the entire plant and wastewater treatment facilities. Has arrived.

However, currently, the monitoring of special chemicals in wastewater relies on human visual inspection or manual analysis which is complex and time consuming and expensive. However, P
There is a continuous automatic measuring device for continuously measuring H, fluorine, COD, TOC (total organic carbon), UV (ultra violet) and the like.

However, in addition to the above items, automatic measurement for automatically measuring chemical substances that affect organisms such as TMAH which is the main component of the developer, various surfactants, organic chlorine compounds, higher alcohols, etc. The device does not currently exist. In terms of safety, it is not enough to satisfy one item (chemical substance) in terms of water quality, and all items (all items including special chemical substances) must be satisfied in terms of water quality. The biological safety of wastewater from the above factories is not ensured. Therefore, the above-mentioned conventional automatic water quality measuring device is not satisfactory in terms of water quality measurement for ensuring safety.

With such a background, as a method of monitoring whether or not the wastewater containing various chemical substances is safe, the behavior of the fish in the test water is converted into an electric signal as image information, and the water quality is detected by the image monitoring device. There is a method for monitoring anomalies (Japanese Patent Laid-Open Nos. 63-142259 and 63-30735).
(See No. 8). This method is a system that selects a specific fish species among aquatic animals, processes the image, and issues an alarm. In this method, the movement of fish is image-processed to detect an abnormality in water quality, and an alarm is issued.

As another device for monitoring the safety of wastewater containing a wide variety of chemical substances, there is an image monitoring device for organisms which uses a lighting device and utilizes a fish image illuminated by the lighting device ( (See JP-A-2-242154).

[0013]

However, the above-described conventional water quality monitoring method and water quality monitoring device have the following problems.

First, in the water quality monitoring method of simply observing only fish with the naked eye, in order to judge the presence or absence of the mixing of chemical substances into the wastewater by observing the peculiar behavior of the fish, which is a living thing, Need to be familiar with the behavior of fish. In other words, this method has a problem in that the accuracy of water quality judgment depends on the skill of the watcher, so that it cannot be judged by anyone and lacks objectivity and certainty. Therefore, in an extreme case, since the water quality abnormality is not known until the fish dies, there is a problem that the response to the water quality abnormality is delayed.

Further, in the water quality monitoring method for detecting the abnormality of the water quality by image-processing the movement of the fish while keeping the fish breeding environment constant, first of all, it is necessary to be familiar with the image processing system in the monitoring equipment. There is a degree problem. Secondly, there is a problem that the monitoring equipment having the image processing function is expensive. Thirdly, there is a problem that the image processing operation also requires skill and time.

Further, when only fish is used as an observed organism, there is a problem that low-concentration environmental pollution, that is, low-concentration water quality abnormality cannot be detected. Specifically, for example, in the treated water of the developer-containing wastewater in the above-mentioned semiconductor factory or liquid crystal factory, if the treatment is bad, aquatic animals that are sensitive to water quality will not be able to live, as in the case of Kawarina, but with that water quality, fish Can live. Therefore, there is a demand for a monitor device and method capable of detecting a certain degree of water quality abnormality and improving wastewater treatment equipment before the fish are affected.

In particular, when a large number of fish inhabit the river to which the wastewater is discharged and the amount of water in the river is small, an abnormality occurs in the conventional monitoring equipment and also an abnormality occurs in the fish in the river. Is. Since we want to detect abnormal water quality before it affects fish, there is a need for a detection system that uses aquatic animals that are more sensitive to water quality than fish.

In the future, as wastewater treatment methods for semiconductor factories and liquid crystal factories are being adopted with wastewater treatment methods that do not affect the local environment, it is expected that factory wastewater will adversely affect the local environment. In order to prevent this, a biologically advanced water quality monitoring method and a water quality monitoring device capable of accurately detecting deterioration of the water quality of wastewater are required. Further, it is needless to say that, today, maintaining and maintaining the local environment is a social responsibility of a company, so that not only high accuracy but also low cost is required.

Therefore, an object of the present invention is to provide a simple water quality monitoring device and a water quality monitoring method which can monitor the water quality severely and highly accurately and confirm safety, and which is economical and simple in operation.

[0020]

In order to achieve the above object, the water quality monitoring device according to the first aspect of the present invention is such that drainage is introduced and the water permeable bottom surface and the outer surface of the bottom surface face the bottom surface. And a test water tank that has a light amount discrimination sensor arranged in a narrower direction from the opening toward the bottom, and that receives the light intensity signal from the light intensity determination sensor, and the light intensity Water quality determining means for determining the water quality of the waste water based on a signal is provided.

A water quality monitoring device according to a second aspect of the present invention is the water quality monitoring device according to the first aspect, in which breeding water in which Kawachina can live in a healthy manner is introduced, and a light-transmissive bottom face and the bottom face are provided. And a light amount discrimination sensor arranged opposite to the bottom surface on the outside of the, and has a narrowing from the opening toward the bottom, has a control aquarium for breeding Kawana and fish, the water quality determination means Is based on the signal difference between the light amount signal from the light amount determination sensor of the test water tank and the light amount signal from the light amount determination sensor of the control water tank, to determine the water quality of the wastewater introduced into the test water tank. It is characterized by being.

The invention described in claim 3 is the same as claim 1
Alternatively, the water quality monitoring device according to the item 2 is characterized by having a breeding aquarium for keeping the above-mentioned Kawarina and fish in a healthy manner.

Further, the water quality monitoring method of the present invention according to claim 4 has a light-transmitting bottom surface and a light quantity determining sensor arranged outside the bottom surface so as to face the bottom surface. Into the test water tank that is narrowing toward, the drainage is introduced, the Kawana and the fish are bred in this tank, and the water quality of the drainage is determined based on the light intensity signal output by the light intensity determination sensor. There is.

The water quality monitoring method according to a fifth aspect of the present invention is the water quality monitoring method according to the fourth aspect, wherein a light transmissive bottom surface and an amount of light disposed outside the bottom surface and facing the bottom surface. The control aquarium, which has a discrimination sensor and narrows from the opening to the bottom, introduces breeding water in which the kawana can live in a healthy manner, breeds the kawaina and the fish in the control aquarium, and the test aquarium described above. The water quality of the wastewater introduced into the test water tank is determined based on the signal difference between the light amount signal from the light amount determination sensor included in the control water tank and the light amount signal from the light amount determination sensor included in the control water tank.

[0025]

According to the water quality monitoring device of the invention described in claim 1, when the quality of the waste water as the test water introduced into the test water tank is good, the kawana bred in the test water tank is subjected to the above test. Climbing to the side of the aquarium. The fish bred in the test water tank freely swim in the test water tank (see FIG. 1).

Next, when the quality of the wastewater introduced into the test tank deteriorates, first, the shellfish Kawana, which is more sensitive to environmental pollution than water, is sensitive to water quality and snails. Withdraw your body into the shell like a (cochlea). Then, the Kawarina falls on the light-transmissive bottom surface of the narrowed bottom portion. Then, the amount of light that the Kawana has blocked from entering the light through the opening and reaching the light amount determination sensor facing the light-transmitting bottom surface increases. Then, the water quality determination means that receives the light intensity signal from the light intensity determination sensor determines that the water quality of the wastewater has deteriorated.

Next, when the water quality of the waste water is further deteriorated, the fish kept in the test water tank become sluggish. Then, the fish tends to sink near the narrow bottom of the test water tank, and the light amount reaching the light amount determination sensor further decreases. On the other hand, when the water quality deteriorates, the fish may die and float, but since the fish die and lie on the water surface, the light amount is reduced. Then, the water quality determination means receives the light intensity signal from the light intensity determination sensor and determines that the water quality of the wastewater is further deteriorated.

As described above, according to the invention of claim 1, two or more kinds of monitoring organisms (kawana and fish) having different water quality suitable for inhabiting test water as factory wastewater are used.
Use to evaluate water quality. That is, the above invention is
The light quantity discriminating sensor described above mainly detects that black Kawana and fish falling on the light-transmitting bottom surface of a certain area block the passage of the light rays radiated from the opening, resulting in a change in illuminance. Is configured to detect and issue an alarm. The above invention realizes a water quality monitoring device having a unique function, which comprises two or more types of aquatic animals having different habitat adaptive water qualities. Detect and
Moreover, the water quality of the wastewater can be detected easily and economically.

The present invention is economical because it does not require costly image processing, unlike the prior art. Therefore, the water quality monitoring device of the present invention is economical and simple, the operability of the device is simple, and there is almost no trouble in the device.

Since the present invention is a system for detecting water quality abnormalities, focusing on a particularly direct action in which a kawana is withdrawing its body into a shell like a snail when water quality is abnormal, it is basically a conventional system. different.

Examples of aquatic animals that are sensitive to water quality other than kawanina include firefly larvae and dragonfly larvae that belong to insects, but they are not as sensitive to water quality as kawaina and are habitual with kawaina. However, it is difficult to use the equipment of the present invention. Experiments have shown that kawana, which feed on fireflies, are relatively weaker than fishes in terms of environmental pollution and their movements toward pollution are clearer than in fishes. Therefore, Kawarina is much superior to fish as a water quality monitoring animal. In fact, the rivers where Kawana is inhabited today has little environmental pollution. Kawanana is a water area where humans and rivers can be integrated, and it lives in a slightly polluted water area (water in beta) where ayu and fireflies live. Therefore, it is very important from the viewpoint of countermeasures against chemical hazards to incorporate kawana as an indicator organism for environmental pollution into the biological monitoring system of semiconductor factories and liquid crystal factories.

According to the second aspect of the present invention, the light amount signal from the light amount discriminating sensor of the control aquarium into which the breeding water capable of habitually living in Kawachina is introduced, and the light amount signal from the light amount discriminating sensor of the test tank. The water quality of the wastewater introduced into the test water tank is determined based on the signal difference of. Therefore, according to the second aspect of the present invention, it is possible to prevent a change in the behavior of the kawana or fish due to a factor different from the change in the water quality of the wastewater from affecting the judgment of the water quality of the wastewater, thereby improving the accuracy of the water quality judgment. To be made. That is, the invention of claim 2 is
For example, if the amount of light reaching the light intensity sensor of the test tank changes due to seasonal diseases such as white spot disease of fish, the fish in the control tank will also be affected by white spot disease. The amount of light reaching the light amount determination sensor of the control water tank changes similarly to the amount of light reaching the light amount determination sensor of the test water tank.

Further, the invention according to claim 3 has a breeding aquarium for keeping the above-mentioned kawachina and fish in a healthy state, and therefore is always alive and healthy, and is aquatic in a small space of the test aquarium. Animals (kawana and fish) are available.

Further, according to the water quality monitoring method of the invention described in claim 4, as in the water quality monitoring device of the invention described in claim 1, the operation of the kawaina and the fish which changes according to the change of the drainage water quality is performed. The change is converted into a change in the amount of light reaching the bottom in a test water tank in which the bottom narrows and the bottom is transparent. Therefore, according to the present invention, the change in the drainage water quality is converted into the change in the light amount, and the water quality of the wastewater can be determined based on the light amount signal output from the light amount determination sensor.

Further, the water quality monitoring method of the present invention according to claim 5 is a method in which the aquatic fish and fish are reared in the control aquarium into which the breeding water capable of inhabiting the aquatic catfish is introduced, and the light quantity determination of the test aquarium is carried out. Based on the signal difference between the light amount signal from the sensor and the light amount signal from the light amount discriminating sensor of the control water tank, the water quality of the wastewater introduced into the test water tank is determined. Therefore, according to the present invention, when the behavior of the river crab or fish changes due to seasonal factors other than the water quality of the drainage, the signal difference does not change, and therefore the accuracy of determining the water quality of the drainage is improved.

[0036]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the illustrated embodiments.

An embodiment of the water quality monitoring device of the present invention will be described with reference to FIG. In this example, the test water tank 1
And a control water tank 10 and a cultivated water tank 11 for Kawana and fish.

The shapes of the test water tank 1 and the control water tank 10 are exactly the same. Test water as waste water is introduced into the test water tank 1, and tap water obtained by treating residual chlorine with activated carbon is introduced into the control water tank 10.

That is, as shown in FIG. 1, the test water tank 1
The process wastewater after the treatment is introduced into the process wastewater through the process wastewater inflow pipe 23, the process wastewater wastewater treatment facility 24, the pipe 25, and the general pipe 17. Further, the processed developer-containing wastewater is introduced into the test water tank 1 through the inflow pipe 19 for the developer-containing wastewater, the wastewater treatment facility 18 for the developer-containing wastewater, the pipe 26, and the general pipe 17.

In the control water tank 10, the city water inflow pipe 2
City water (tap water) that flows in from 0 is introduced into the city water treated water in which residual chlorine is processed by the activated carbon of the activated carbon adsorption tower 21. The control aquarium 10 is a facility for comparing the movements of aquatic animals and fish that are kept in water that is safe in terms of water quality, which are specific to aquatic organisms, with the movements of the aquatic animals and fish in the test water tank 1.

By installing this control water tank 10, it is possible to know the change in the behavior of the kawaina and the fish caused by factors other than the quality of the waste water introduced into the test water tank 1. Therefore, the difference between the behavior of the kawaina and the fish in the control aquarium 10 and the behavior of the kawaina and the fish in the test aquarium 1 depends on the safe water quality introduced into the control aquarium 10 and the test aquarium 1. This represents the difference in water quality from the introduced wastewater.

Therefore, by providing the control aquarium 10, the behavior of the kawana and the fish whose behaviors can be easily changed even by a slight change in the environment (as an example, the white spot disease of fishes that occurs regularly at a specific time). Among them, it becomes possible to clearly understand the behavioral changes with respect to the above-mentioned changes in the water quality of the wastewater.

Each of the test water tank 1 and the control water tank 10 has a hopper shape, a bottom portion is cylindrical, and an upper portion is narrowed toward the bottom portion. The bottom may have a rectangular parallelepiped cross section. The cross-sectional shape of the upper portion may be circular or square. Further, it is preferable that an angle formed by the side surface of the upper portion narrowing toward the bottom portion and the horizontal surface is 60 degrees or more.

At the boundary between the upper part and the bottom part of the test water tank 1, a kawaina drop prevention net 2 is attached. The bottom surface of the bottom portion is a transparent portion 3 made of acrylic or glass that transmits light. And this transparent part 3
A light amount discrimination sensor 8 facing the transparent portion 3 is arranged in a light amount discrimination sensor chamber 38 provided outside the. The light quantity determination sensor 8 is connected to the sensor controller 39 via the wiring 37. Further, the sensor controller 39 is connected to the monitor TV board 15. This monitor TV board 15 has two monitor cameras 16
This monitor camera 16 is arranged so as to face the opening of the test water tank 1 and the opening of the control water tank 10. Since the monitor camera 16 is provided, it is possible to monitor the state of the Kawana 28 and the fish 27 in the test water tank 1 at the center where the monitor TV board 15 is installed, without going to the site.

A light 7 for irradiating light toward the openings of the test water tank 1 and the control water tank 10 is provided. The light from the light 7 passes through the transparent portion 3 and reaches the light amount determination sensor 8, and the light amount determination sensor 8 outputs a light amount signal according to the received light amount. The light amount signal output from the light amount determination sensor 8 is input to the sensor controller 39.

The sensor controller 39, when the light quantity represented by the light quantity signal is less than the set range,
Output an alarm signal. The alarm signal emitted from the sensor controller 39 is input to the monitor TV board 15, and the first alarm lamp 40 attached to the monitor TV board 15 is attached.
The second alarm lamp 41 is blinked.

Further, inside the opening of the test water tank 1 and the opening of the control water tank 10, a feeding place 6 for the kawana 28 is provided. An air diffuser 5 is provided in the middle of the upper portions of the test water tank 1 and the control water tank 10. Air is supplied to the air diffuser 5 from a blower 9 which is an air generation source, and air is supplied from the air diffuser 5 into the water tanks 1 and 10. By supplying air into the water tanks 1 and 10, the dissolved oxygen concentration in the water tanks 1 and 10 is appropriately maintained.

A heater 29 connected to a thermostat 30 is attached in the middle of the upper portion of the test water tank 1 and the control water tank 10. This heater 2
9 and the thermostat 30 constitute a water temperature adjusting device, and the water temperature adjusting device raises the water temperature to raise the water temperature.
And make the movement of the fish 27 active and proper.

When the water quality is particularly good and the dissolved oxygen is sufficient, the kawaina 28 has a tendency to climb the side surface of the test water tank 1 rather than being located near the fall prevention net 2 near the bottom of the test water tank 1. When vegetables such as lettuce, cabbage, cabbage, and daisies are left in the feeding area 6 for the kawachina 28 in the upper part of the aquarium, the kawaina 28 rises on the side surface of the test aquarium 1 toward the baits.

Next, the water tank 11 for cultivating kawana and fish will be described. The aquatic animals are Kawana 28 and fish 2
However, activity is affected by the concentrations of ammonia nitrogen and nitrite nitrogen in water. The above-mentioned farm water tank 11
Is an aquarium that reduces the concentrations of ammonia nitrogen and nitrite nitrogen in the water to keep Kawana and fish in a healthy and active state.

The farm water tank 11 includes a kawarina tank 35 for cultivating the kawaina 28 and a fish tank 34 for cultivating the fish 27.
And a filtration tank 13. The filtration tank 13 has
As the filtering material, vinylidene chloride 31, which is a fibrous member, porous glass 32, and calcium carbonate mineral 33 are filled in order from the top. The vinylidene chloride 31, the porous glass 32, and the calcium carbonate mineral 33 are efficiently propagated with the microorganisms (nitrosomonas and nitrobacter) for surely treating the ammoniacal nitrogen and the nitrite nitrogen. ing.

The water introduced into the aquaculture tank for fish and fish 11 described above flows into the activated carbon adsorption tower 21 from the city water inflow pipe 20, and the residual chlorine is treated by the activated carbon filled in the activated carbon adsorption tower 21. It is the water after This water is first supplied to the Kawana tank 35,
Through the overflow pipe 14 of the above and falls into the fish tank 34. In the fish tank 34, an appropriate fish species can be selected from fish such as medaka, carp, crucian carp, goldfish, sardine, kawamutu, oikawa, wheat stick, kamatsuka, and moroko. Generally, among the above-mentioned fishes, carp, crucian carp, goldfish, etc. are relatively resistant to pollution, while kawamutu, oikawa, etc. are susceptible to pollution. The species of fish to be tested may be determined according to the type of fish obtained from the river where the factory is released.

The breeding water in the fish tank 34 passes through the overflow pipe 14 of the fish tank 34 and drops into the filtration tank 13. The breeding water treated by Nitrosomonas or Nitrobacter which propagates in the vinylidene chloride 31, the porous glass 32 and the calcium carbonate mineral 33 is returned to the Kawana tank 35 by the circulation pump 36. On the other hand, when it is desired to replace and replace the breeding water with new city water, the city water can be gradually introduced and the breeding water can be discharged from the overflow pipe 14 of the filter tank 13.

In addition, about 1
After a period of more than a month, mainly aerobic nitrosomonas or nitrobacteria breed and live in the vinylidene 31 and the porous glass 32 of the filtration tank 13. Then, it treats harmful ammonia nitrogen and nitrite nitrogen excreted by fish.
The role of the calcium carbonate mineral 33 is mainly to adjust the pH of the breeding water due to the increase in nitrate nitrogen.

Since the vinylidene chloride 31 has a higher ability to attach feces from fish than the porous glass 32, it is installed in front of the porous glass 32. Then, a floating substance such as fish dung is attached to the vinylidene chloride 31 so that not only the treatment of ammonia nitrogen but also the treatment of the floating substance as an organic substance is aerobically performed. Since the suspended substance as an organic substance is treated in the previous stage of the porous glass 32, it is possible to efficiently treat the ammoniacal nitrogen and the nitrite nitrogen without clogging the pores themselves. As described above, since the breeding water is sufficiently treated in the farm water tank 11, the Kawana 28 and the fish 27 can be always kept in a healthy and healthy state. Therefore, the healthy and healthy Kawana 28 and fish 27 in the farm water tank 11 are
If it is supplied to the test water tank 1 or the control water tank 10, the drainage water as the test water can be evaluated reliably and accurately.

Next, the operation of the water quality monitoring device having the above construction will be described, and an embodiment of the water quality monitoring method of the present invention will be described.

In a semiconductor factory or a liquid crystal factory, the developer is used in the production process and flows into the wastewater treatment facility 18 through the inflow pipe 19 for the developer-containing wastewater shown in FIG.
The developer-containing wastewater treated by the wastewater treatment facility 18 passes through a developer-containing wastewater-treated water pipe 26 to form a general pipe 1.
Introduced in 7. On the other hand, the process wastewater is treated by the wastewater treatment facility 24 for the process wastewater, and then introduced into the general pipe 17 through the pipe 25 for the process wastewater treatment water to treat the treated water of the developer-containing wastewater and the process wastewater. The water and the treated water are joined together by a general pipe 17.

The integrated drainage water from the factory in the integrated pipe 17 is introduced into the above-mentioned embodiment in which a part of the drainage water is a water quality monitoring device as a biological monitoring equipment for Kawana and fish.

When the quality of the wastewater introduced into this embodiment deteriorates, first of all, as a first step, the kawana 28
Fall from the side surface of the test water tank 1 and gather on the upper part of the Kawachina fall prevention net 2. For example, when 10 or more kawarina are bred in the test water tank 1, most of the kurowana 28 are collected in the upper part of the kawaina fall prevention net 2 due to deterioration of water quality. Then, the light from the light 7 is blocked by the kawanin 28 on the kawaina drop prevention net 2, so that the amount of light reaching the light amount determination sensor 8 decreases.
Then, the sensor controller 39 detects that the difference between the light amount signal from the sensor 8 of the test water tank 1 and the light amount signal from the sensor 8 of the control water tank 8 has increased, and outputs an alarm signal to the monitor TV board 15. Output to. Then the first
The alarm lamp 40 blinks and a first-stage alarm is generated.

When the water quality of the wastewater is improved by improving the wastewater treatment facilities 18 and 24, the Kawana 2
8 becomes healthy, starts climbing the wall surface of the test water tank 1 toward the feeding ground 6 of Kawana again, the light quantity reaching the light quantity determination sensor 8 of the test water tank 1 is secured, the alarm is released, and the first alarm lamp The blinking of 40 stops and the alarm returns. What is important here is to use Kawana 28 as a biological index. That is, with a slight deterioration in water quality (low-concentration water pollution), the kawaina 28 returns to the shell like a snail and falls from the wall surface of the test water tank 1, but does not die. Then, when the water quality is improved, the kawaina 28 has a habit of acting as active as before. In this embodiment, the habit of the kawaina 28 is skillfully utilized to monitor the water quality with high accuracy. When only fish is used as the monitor organism as in the conventional example, the water quality monitoring accuracy is lower than in this embodiment.

Next, if the water quality further deteriorates, then the behavior of the fish 27 changes, and if the water quality continues to deteriorate thereafter, the fish 27 will die. Depending on the case, the dead fish 27 fall on the Kawana drop prevention net 2 or float on the water surface. If the water quality deteriorates in this second stage, both the Kawana 28 and the fish 27 will fall on the Kawana fall prevention net 2, or even if the fish floats on the water surface, the fish will lie near the light. Therefore, the amount of light decreases. That is, in the test water tank 1, the light from the light 7 hardly reaches the light amount determination sensor 8. Then, the difference between the signal from the sensor 8 of the test water tank 1 and the signal from the sensor 8 of the control water tank 10 becomes maximum, and the sensor controller 39 outputs an alarm signal to the monitor TV board 15 to cause the first alarm. Both the lamp 40 and the second alarm lamp 41 blink, and two types of alarms are simultaneously generated.

When these two types of alarms are issued at the same time, the discharge of wastewater from the wastewater treatment facilities 24, 18 of the factory is stopped, and an emergency tank separately provided until the safety of wastewater is secured again. The wastewater is stored in (not shown).

As described above, the above-mentioned kawaina 28 and fish 27
The water quality monitoring method by organisms such as, TMAH in the developer-containing wastewater is measured by chemical analysis,
It is significantly advantageous in terms of time, labor and cost as compared to the method of monitoring the behavior of fish by monitoring the quality of drainage water. That is, according to this embodiment, anyone can easily and quickly confirm the quality of water.

Further, according to the above-mentioned embodiment, the Kawana 28 and the fish 27 in the test water tank 1 and the control water tank 10 are replaced with the healthy and healthy Kawana fish and fish kept in the farm water tank 11 at regular intervals. You can Therefore, the health status of the water quality monitoring organisms such as kawana and fish can always be optimized, and the biological detection of water quality abnormality can be maintained with high accuracy.

Next, the experimental results according to the above-mentioned embodiment will be shown below.

In the experimental apparatus corresponding to the above-mentioned embodiment, the test water tank 1 and the control water tank 10 each have a volume of about 20 liters, and the total capacity of the aquaculture fish and fish culture water tank 11 is about 50 liters.
It was liter. Then, in the test water tank 1 and the control water tank 10, there are 10 dogs and 30 kawanaina, respectively.
I put in a cat.

On the other hand, as other conditions, the light 7 is set to 10
A general electric lamp of 0 watt was used. When an experiment was conducted using this apparatus, when all the wastewater was treated surely and there was no abnormality in the water quality, the illuminance at the light quantity discrimination sensor 8 portion of the test water tank 1 was 370 lux. On the other hand, when the developer-containing wastewater was partially untreated and introduced into the test water tank 1 to such an extent that the Thai liquor tanago was not killed, about half of the Kawachina dropped from the wall surface of the test water tank 1. At this time, the illuminance measured at the light amount discrimination sensor 8 of the test water tank 1 was 146 lux. At this time, the control water tank 10
Then, since five Kawana 28 sat at the Kawana fall prevention net 2, the light quantity determination sensor 8 of the control aquarium 10
The illuminance at this location was 280 lux, but the above illuminance at the light quantity discrimination sensor 8 of the test water tank 1 was 146 lux.
There was a clear difference. Since the sensor controller 39 was previously set to generate an alarm signal when the illuminance at the light amount determination sensor 8 of the test water tank 1 became 150 lux or less, the first alarm lamp 40 flashed at this time. Of course, at this time, all the ten Taira burha tanago in the test water tank 1 were alive.

Next, in the second stage, when the inflow of untreated developer-containing wastewater into the test water layer 1 is further increased,
All of the Kawachina 28 dropped from the wall surface of the test water tank 1, and the movement of the Tailing Baratanago also changed. The changes in the movements of the Tairaikubaratanago include, first of all, the movement becoming sluggish, the fact that it does not escape quickly even if it is touched by the hand, and the bait of the bait becomes poor. Then, the body color of the Tairaikubaratanago has changed from a bright color to a white color.

At this time, the illuminance at the light amount discrimination sensor 8 of the test water tank 1 was measured and found to be 47 lux. Since the sensor controller 39 was previously set to output an alarm signal for blinking the second alarm lamp 41 when the illuminance at the light amount discrimination sensor 8 of the test water tank 1 became 50 lux or less, this At that time, the second alarm lamp 41 also flashed.

As described above, in the above-mentioned examples, two kinds of organisms (Kawanna and Tairikubaratanago) whose behavior is sensitively perceived by the change in water quality are used, and a test aquarium containing the two kinds of organisms is used. By devising the shape, the quantity of light reaching the sensor of the test water tank 1 is reduced by deteriorating the water quality of the introduced waste water. Therefore, according to this embodiment, the behavior of a living being can be converted into a signal representing water quality without using the image processing device as in the conventional example. Therefore, according to this embodiment, it is possible to monitor the water quality simply and quickly, saving time and cost.

[0071]

As is apparent from the above, in the water quality monitoring device of the first aspect of the present invention, the drainage is introduced, and the light-transmitting bottom surface and the light quantity discrimination disposed outside the bottom surface and facing the bottom surface. It has a sensor, a test aquarium breeding Kawana and fish, and a water quality determination means for receiving the light intensity signal from the light intensity determination sensor and determining the water quality of the wastewater based on the light intensity signal. It is a thing. Therefore, according to the first aspect of the present invention, when the water quality of the waste water is deteriorated, the kawana falls from the side wall of the test water tank and drops to the light-transmitting bottom surface, so that the light amount received by the light amount determination sensor decreases. That is, according to the first aspect of the invention, when the water quality deteriorates, the amount of light received by the sensor decreases, and the water quality determination means can determine the water quality based on the light amount signal from the sensor. Therefore, according to the invention of claim 1, the time for water quality judgment can be shortened as compared with the case where the components of the waste water are chemically analyzed, and the deterioration of water quality can be dealt with swiftly. Further, according to the invention of claim 1, as compared with the conventional example in which the behavioral change of the organisms in the drainage is image-processed and analyzed, the cost is low and anyone can judge the water quality without special analysis technology. be able to.

Further, the invention of claim 2 is the water quality monitoring device according to claim 1, in which breeding water that allows kawana to live healthily is introduced, and a light-transmissive bottom surface and the bottom surface outside the bottom surface are provided. It has a light amount discrimination sensor arranged facing each other, is narrowed from the opening toward the bottom, and has a control water tank breeding kawana and fish, the water quality determination means, the test water tank Based on the signal difference between the light amount signal from the light amount determination sensor and the light amount signal from the light amount determination sensor of the control water tank, the quality of the wastewater introduced into the test water tank is determined. is there. Therefore, according to the second aspect of the invention, it is possible to prevent the behavior of the kawana and the fish from changing due to factors other than the water quality of the drainage water from affecting the water quality judgment of the water quality judging means, and the reliability is improved. High quality water can be judged.

Further, the invention of claim 3 is the water quality monitoring device according to claim 1 or 2, which has a breeding aquarium for breeding kawana and fish in a healthy manner. It is possible to provide healthy Kawana and fish, and improve the accuracy of water quality judgment.

According to the water quality monitoring method of the fourth aspect of the present invention, the water quality of the waste water is judged based on the light quantity signal output from the light quantity judgment sensor arranged in the test water tank. Water quality can be monitored quickly and accurately.

Further, the water quality monitoring method according to the fifth aspect of the present invention is based on the signal difference between the light quantity signal from the light quantity discrimination sensor of the test water tank and the light quantity signal from the light quantity discrimination sensor of the control water tank. Determine the quality of the wastewater introduced into the test tank. Therefore, according to the fifth aspect of the invention, it is possible to prevent the behavior of the kawaina and the fish from changing due to factors other than the water quality of the wastewater from affecting the water quality determination, and it is possible to improve the accuracy of the water quality determination. .

Further, in the inventions of claims 1 to 5, since two kinds of aquatic animals having different water quality adaptation ranges are used for water quality monitoring, the water quality abnormality can be expressed by a two-stage alarm. Further, the inventions of claims 1 to 5 also have an effect that it is possible to promptly deal with abnormal water quality including the inclusion of poisonous substances in wastewater treatment equipment and water purification equipment. Further, since the system is simple, the initial cost of the equipment is low, and anyone can easily recognize the determination of abnormality.

[Brief description of drawings]

FIG. 1 is a detailed diagram illustrating an embodiment of a water quality monitoring device and a water quality monitoring method of the present invention.

[Explanation of symbols]

1 ... Test water tank, 2 ... Kawaina drop prevention net, 3 ... Transparent part,
4 ... Test water outlet piping 5 ... Air diffuser, 6 ... Kawana's feeding ground, 7 ... Light, 8 ... Light quantity discrimination sensor, 9 ... Blower, 10 ... Control water tank, 11 ...
Water tank for Kawana and fish, 12 ... Circulation pump, 13 ...
Filtration tank, 14 ... Overflow pipe, 15 ... Monitor TV board, 16 ... Monitor camera, 17 ... General pipe for treated water, 18 ... Wastewater treatment facility for wastewater containing developer, 19 ... Inflow pipe for wastewater containing developer, 20 ... City water inflow pipe, 21 ... Activated carbon adsorption tower, 22 ... Control water pipe, 23 ... Process wastewater inflow pipe, 24 ... Process wastewater wastewater treatment facility, 25 ... Process wastewater treatment water pipe, 26 ... Developer-containing wastewater treatment Water piping, 2
7 ... Fish, 28 ... Kawarina, 29 ... Heater, 30 ... Thermostat, 31 ... Vinylidene chloride, 32 ... Porous glass, 33 ... Calcium carbonate mineral, 34 ... Fish tank, 35
... Kawana tank, 36 ... Circulation pump, 37 ... Wiring, 38 ...
Light amount determination sensor room, 39 ... Sensor controller, 40
... first alarm lamp, 41 ... second alarm lamp.

Claims (5)

[Claims] 1. A drainage is introduced, and a light transmissive bottom surface and a light amount determination sensor arranged outside the bottom surface to face the bottom surface are provided, and the width is narrowed from the opening to the bottom. A water quality characterized by comprising a test aquarium that breeds kawana and fish, and a water quality determination unit that receives the light intensity signal from the light intensity determination sensor and determines the water quality of the wastewater based on the light intensity signal. Monitor device. 2. The water quality monitoring device according to claim 1, wherein breeding water that allows Kawana to live in a healthy manner is introduced, and the amount of light is disposed outside the light-transmitting bottom surface and opposite to the bottom surface. It has a discrimination sensor, narrows from the opening toward the bottom, and has a control aquarium for breeding Kawana and fish, and the water quality determination means is a light amount from the light intensity determination sensor included in the test water tank. A water quality monitoring device, characterized in that the water quality of the wastewater introduced into the test water tank is judged based on the signal difference between the signal and the light quantity signal from the light quantity discrimination sensor of the control water tank. 3. The water quality monitoring device according to claim 1 or 2, further comprising: a breeding aquarium for breeding the Kawawanina and the fish in a healthy manner. 4. A test water tank having a light-transmissive bottom surface and a light amount determination sensor disposed outside the bottom surface and facing the bottom surface, and draining water into a test water tank narrowing from an opening to a bottom. A method for monitoring water quality, which comprises introducing and breeding kawana and fish in this aquarium, and judging the water quality of the wastewater based on a light quantity signal output by the light quantity discrimination sensor. 5. The water quality monitoring method according to claim 4, further comprising a light-transmissive bottom surface and a light quantity determination sensor disposed outside the bottom surface and facing the bottom surface, and extending from the opening to the bottom. Introducing breeding water that allows Kawana to live in a healthy manner in a narrow control water tank, breeding Kawana and fish in this control water tank, and measuring the light intensity signal from the light intensity discrimination sensor in the test water tank and the control A water quality monitoring method, characterized in that the water quality of the wastewater introduced into the test water tank is judged based on a signal difference from a light quantity signal from a light quantity discrimination sensor of the water tank.