JPH09174097A - Circulating and purifying apparatus for contaminated liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lightweight circulating and purifying apparatus preventing the lowering of decomposition action caused by the accumulation of a decomposition product on a base material having bacteria decomposing org. matter fixed thereto, capable of suitably purifying a contaminated liquid even immediately after the establishment of an apparatus or the washing of the base material and good in handling properties. SOLUTION: A circulating and purifying apparatus is constituted so that a liquid 12 contaminated with the elapse of time is stored in a liquid storage means 10 and this contaminated liquid is purified and sterilized while circulated in the outside of the storage means 10 by a pump 44. In this case, a bacteria purifying means 40 decomposing the org. matter in the contaminated liquid 12 by bacteria to purify the liquid 12, an electrolytic means 38 electrolyzing the contaminated liquid 12 to accelerate the oxiditative decomposition of the org. matter and a physical filter means 42 collecting and filtering the contaminant contained in the contaminated liquid are provided and these means 40, 38, 42 are connected in the circulating route of the contaminated liquid.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for circulating and purifying contaminated liquid, and more particularly, it purifies while circulating a liquid which is contaminated over time, such as bath water in a bathtub or water in a pool.・ It relates to household and commercial circulation purification devices for sterilization.

[0002]

2. Description of the Related Art For example, bath water stored in a bathtub is unavoidably contaminated with dust, sand, and other organic substances such as dirt and hair during bathing, and is contaminated over time, resulting in turbidity, odor, and other sliminess. It is generally known that comfort during bathing is impaired. In addition, the situation is exactly the same in the pool as well, and with use, the stored water in the pool is contaminated over time, which impairs comfort during swimming and is unsanitary. In this case, if the stored water in the bathtub or pool is replaced with new water each time it is used, the problems described above will not occur, which is ideal, but the cost of using tap water and the cost of boiling it in hot water There are various drawbacks, such as the fact that (for example, in the case of a warm water pool) becomes bulky, it takes time to exchange water, and that it is impossible to enjoy bathing or swimming at any time.

As one solution proposal for such a problem, a circulation purification device for a bath generally known as a "24-hour bath" is known. This device is intended especially for domestic use and contains a cartridge in which useful microorganisms are propagated on an aggregate substrate such as crushed stone, gravel or other granular ceramic, and bath water is forced into the cartridge. It can be recycled. A filter made of, for example, sponge is provided in the communication path between the circulation device and the bath. At the time of use, the circulating pump incorporated in the device is driven to suck the bath water in the bathtub, and the sponge filter collects and filters large dust such as hair and thread waste mixed in the bath water. . Then, the pre-filtered bath water is passed through the cartridge, where organic substances such as dirt and body fat in the bath water are decomposed by microorganisms to be cleaned up to an allowable value or less.

[0004]

However, in the above-described purification apparatus according to the prior art, when the organic matter in the bath water is decomposed by the microorganisms propagated on the aggregating base material, fine contaminants produced by the decomposition action. Adhere to the surface of the substrate. For this reason, it is pointed out that if the purification of the bath water with microorganisms is continued, the contaminants cover the surface of the base material in a film form, and the decomposition action of the microorganisms is significantly reduced. In addition, when the amount or size of organic matter exceeds the ability to decompose microorganisms, it takes a considerable amount of time to completely decompose the organic matter, and accumulates on the substrate surface. It was causing a decline.

In addition, since aggregate base materials such as crushed stone, gravel and other granular ceramics, which function as a carrier for microorganisms, are considerably heavier than water, bath water is introduced into the cartridge filled with the base materials. However, it does not flow, and therefore, it is hardly expected that the organic substances adhered / deposited on the surface of the base material will be naturally peeled off by the inflow action of the bath water. For this reason, in the conventional device, it is necessary to wash water substantially forcibly by injecting water into the collective base material in the cartridge from the opposite direction or by aerating the base material with air. It was Further, depending on the model, it is also necessary to take out the cartridge from the apparatus and mechanically agitate the collective base material inside or the user manually agitate. In this way, when the base material is regularly cleaned, continuous purification of bath water is interrupted and bathing becomes impossible, and in most cases, the bath water has to be considerably discarded from the bath, which saves water and reduces costs. From a viewpoint, it is a big problem. Further, in order to sufficiently purify the bath water with the collective base material in which the microorganisms are propagated, it is necessary to secure the area where the base material comes into contact with water as much as possible, and therefore a considerable amount of base material is prepared. It is desirable to do. However, since the crushed stone, gravel, and other granular ceramics, etc. constituting the base material are considerably heavy, there is a drawback that the weight of the purifying device itself becomes heavy, which makes it inconvenient to handle.

Further, in order for the microorganisms to exert a sufficient decomposing power for organic substances, it is necessary that the microorganisms are properly propagated on the surface of the base material. However, since it is difficult to immobilize microorganisms in advance in the collective substrate typified by the above-mentioned granular ceramics, the bath water is circulated after the purification device is installed, and the microorganisms living in the bath water are circulated. It has to wait for the spores to naturally propagate and settle on the substrate surface. Further, when the collective substrate is washed regularly, the microorganisms already propagated and fixed on the substrate may be removed more than necessary. Propagation of microorganisms and stable colonization generally take several days to several weeks, during which purification of bath water by microorganisms can hardly be expected. For this reason, after the cleaning device is newly installed in the bathtub or after cleaning the collective base material in the cartridge, the cleaning function of the bath water does not work, and water stains progress, causing unpleasant turbidity and odor. There was an inconvenience that caused such problems. Therefore, after new equipment is installed or after cleaning the base material, it is necessary to refrain from bathing until the microbes are properly purified, and bath water is used several times until the microbes are stably propagated on the base material. There is a problem in that it takes time and labor to re-install, the amount of water used increases, and the cost increases.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed in order to suitably solve the problems inherent in the above-described conventional apparatus for purifying contaminated liquids, and is a base material on which microorganisms that decompose organic substances are fixed. It prevents degradation products from deteriorating due to the accumulation of decomposition products, and can clean the contaminated liquid appropriately even immediately after the installation of a new device or immediately after cleaning the substrate, and it is lightweight and easy to handle. An object is to provide a circulation purification device.

[0008]

In order to overcome the above-mentioned problems and preferably achieve the intended purpose, the present invention stores a liquid contaminated with time in a liquid storage means and stores the contaminated liquid. In a circulation purification device for polluted liquids, which is purified and sterilized while being circulated by a pump outside the means, a microbial purification means for decomposing and purifying organic substances contained in the polluted liquid by microorganisms, and electrolysis of this polluted liquid And an electrolysis means for accelerating the oxidative decomposition of the organic matter, and a physical filtration means for collecting and filtering the pollutants contained in the contaminated liquid. These means are connected and connected in the circulation path of the contaminated liquid. It is characterized by having done.

In order to overcome the above-mentioned problems and preferably achieve the intended purpose, another invention of the present application is to store a liquid contaminated with time in a liquid storing means, and store the contaminated liquid in the storing means. In a circulation purification device for polluted liquids, which is purified and sterilized while being pumped and circulated outside the pump, a granular synthetic polymer gel containing microorganisms that adsorbs and decomposes organic substances contained in the polluted liquids and purifies them. A microbial septic tank that is filled, an electrolysis tank that electrolyzes the contaminated liquid to promote the oxidative decomposition of the organic matter, and a physical filtration tank that collects and filters the pollutants contained in the contaminated liquid, The respective tanks are connected to each other in a circulating path of the contaminated liquid.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a circulating liquid purification apparatus for a contaminated liquid according to the present invention will be described below with reference to the accompanying drawings with reference to preferred embodiments. It should be noted that although a circulation purifying apparatus provided in a domestic bathtub will be described as an example, it is needless to say that it can be suitably used for an outdoor pool and an indoor warm water pool.

(Regarding Overall Structure of Circulation Purification Device) FIG.
1 shows a schematic configuration of a circulation purification apparatus according to an embodiment of the present invention, which purifies bath water 12 stored in a bath 10 and contaminated with time while pumping circulation of the bath water 12 outside the bath 10. And sterilization. That is, as shown in FIG. 10, the circulation purification device according to the embodiment has a bathtub 10
It is basically composed of a water supply / drainage unit 14 which is detachably attached to the unit, and an apparatus main body 20 which is connected to the unit 14 via a water absorption hose 16 and a drainage hose 18. This device body 20 is installed, for example, at the edge of the bathtub 10 and is supplied with power via an earth leakage breaker 22 and a cable 24, and is surely grounded by an earth cable 26 to ensure complete protection against earth leakage and electric shock. Has been. As will be described later with reference to FIG. 11, the water supply / drainage unit 14 is detachably attached to the inner wall surface of the bathtub 10 by a suction cup 28 as an example, and is located below a general storage level of the bath water 12.

The water supply / drainage unit 14 shown in FIGS. 10 and 11 comprises, for example, a rectangular box-shaped casing 30,
On the front surface of the casing 30, there are provided a water suction port 32 for sucking the bath water in a vertical relationship and a discharge port 34 for returning the purified bath water to the bath 10. Further, the suction cup 28 is arranged on the back surface of the box-shaped case 30 so that the water supply / drainage unit 14 can be attached to the inner wall surface of the bathtub 10. The water suction port 32 is connected to the apparatus main body 20 through a water suction hose 16 and a filter 36 made of, for example, a sponge material is detachably provided at the opening of the water suction port 32 to remove large dusts mixed in the bath water. It is designed to collect and remove hair and other foreign matter. Further, the discharge port 34 is communicatively connected to the apparatus body 20 via the drain hose 18.
The water suction port 32 and the discharge port 34 are completely immersed in the bath water when the water supply / drainage unit 14 is attached to the inner wall surface of the bathtub 10. Then, when the circulation purification device described later is operated, the bath water in the bathtub 10 flows into the device body 20 through the water suction port 32 and the water suction hose 16 under the action of the circulation pump, and is purified and sterilized there. After that, the cycle of returning to the bath 10 through the drain hose 18 and the discharge port 34 is repeated.

As shown in FIG. 1, the apparatus body 20 of the circulation purification apparatus is an electrolytic cell for electrolyzing the bath water 12 which is contaminated with time, and promoting the oxidative decomposition of organic matter such as dust contained in the bath water 12. 38, and a microbial septic tank 40 for adsorbing and decomposing organic substances contained in the bath water 12 with microorganisms for purification
And a physical filtration tank 42 for collecting and filtering organic or inorganic pollutants contained in the bath water 12 and these tanks are connected to each other through a pipe line through which the bath water 12 is circulated. ing. That is, the water absorption hose 16 provided in the water supply / drainage unit 14 is connected to the electrolytic cell 3 via the bath water circulation pump 44.
8 is connected to the inlet side, and the outlet side of the electrolytic cell 38 is connected to the inlet side of the microbial purification tank 40 via a pipe line 46. Further, the outlet side of the microbial septic tank 40 is connected to an inlet side of an electric heating tank 50 for heating and raising the temperature of the bath water via a conduit 48, and the outlet side of the electric heating tank 50 is physically connected via a conduit 52. It is connected to the inlet side of the filtration tank 42. The outlet side of the physical filtration tank 42 is connected to the drain hose 18 via a required pipe line 54. A flow sensor 56 for detecting the flow rate of the bath water is inserted in the pipe 54 for returning the bath water after purification / sterilization to the bath 10, and a pipe 48 connected to the inlet side of the electric heating tank 50. A temperature sensor 58 for detecting the temperature of the bath water is inserted in. Further, inside the electric heating tank 50, a water level sensor 60 for monitoring the water level in the tank is provided. Each of these sensors is shown in FIG.
By connecting to the control circuit 62 shown in the control block of FIG. 1, information necessary for various controls of the apparatus main body 20 is input to the circuit 62.

(About Electrolyzer) As shown in FIG. 9, for example, the electrolyzer 38 includes an upright box-shaped casing 64 and two electrode portions 6 disposed inside the casing at a required interval.
6, 68, and by selecting the polarity of the DC voltage applied thereto, one electrode portion 66 can function as an anode and the other electrode portion 68 can function as a cathode. . As the material of the anode 66, aluminum, stainless steel, ferrite, platinum, platinum-coated titanium (Ti) or the like is preferably used, and as the cathode 68, aluminum, platinum, platinum-coated (Ti) or the like is preferably used. To be Among these electrode materials, stainless steel and aluminum tend to be eluted into the bath water by electrolysis. In this case, since the organic substances in the bath water are aggregated with the metal ions eluted in the bath water as nuclei, it can be expected that the organic substances can be easily collected and filtered in the subsequent process. In this embodiment, platinum-coated titanium (Ti) is used for both the anode 66 and the cathode 68. The casing 64 may have a cylindrical shape, or the casing 64 may serve as one of the electrodes. Furthermore, the number of electrodes does not have to be a plurality of pairs, and may be an odd number array.

(About microbiological septic tank) Microbiological septic tank 40
Is for adsorbing and decomposing and purifying the organic matter contained in the bath water 12 by the decomposing action of microorganisms, and in this embodiment, a synthetic polymer gel is preferably used as a carrier for microorganisms. As the synthetic polymer gel, granular polyvinyl alcohol (hereinafter referred to as "PVA") gel having excellent water resistance, elasticity and flexibility and having high water content is preferably used. For example, as shown in FIG.
Is an upright cylindrical casing 70, a tubular water channel 72 disposed inside the casing 70 and extending along a central axis, an inflow port 70a and an outflow port opened at the bottom of the casing 70. 70b and the casing 70
It is basically composed of a required amount of PVA gel 74 filled inside. The inlet 70a and the outlet 70b are
A filter 76 having a mesh size that prevents the granular PVA gel 74 from flowing out is provided. Therefore, the bath water that has flowed into the casing 70 through the inflow port 70a reverses after rising in the centrally located tubular water flow path 72 and descending the annular water retention portion 78, and then outflow port 70b.
It is something that flows out from.

As the PVA gel 74, it is desirable to use a PVA gel that has been entrapped and fixed in advance so as to include useful microorganisms that decompose organic substances such as dirt and body fat contained in bath water. Examples of useful microorganisms of this kind include Pseudomonas spp., Aspergillus spp.
illus) and Saccharomycetes, microorganisms and enzymes, and other activated sludge used for wastewater treatment, nitrifying bacteria, denitrifying bacteria and the like. By comprehensively immobilizing such useful microorganisms on the PVA gel 74, the organic substances are decomposed by the microorganisms immediately after the start of using the apparatus. Each of the PVA gels 74 is in the form of particles having a diameter of about several mm, and the PVA gels 74 are filled so as to occupy about 20% to 50% of the casing 70. That is, by adjusting the filling amount of the PVA gel 74 to this extent, the bath water flowing into the casing 70 can freely flow the PVA gel 74, so that the residue produced after being decomposed by microorganisms is PVA. The disadvantage of adhering to the surface of the gel 74 is avoided. When a gel that has not been subjected to entrapping immobilization of microorganisms is used as the PVA gel 74, it waits for the microorganisms to naturally land on the PVA gel 74 and propagate.

(Physical Filter Tank) The physical filter tank 42 is
It is for physically collecting and filtering fine organic or inorganic pollutants contained in the bath water 12, and a so-called winding filter is internally loaded as a filtering material. For example, as shown in FIG. 5, the physical filtration tank 42 includes a cylindrical casing 80 that is vertically arranged, a winding filter 82 that is detachably concentrically arranged inside the casing 80, and an inlet port that is opened at the bottom of the casing 80. 80
It is basically composed of a and the outlet 80b. The winding filter 82 is constructed by winding a required number of windings of a linear material 86 around a cylindrical core 84 as shown in the drawing, and a large number of through holes 84b in a hollow portion 84a penetrating the center of the cylindrical core 84. Has been drilled. As the linear material 86,
For example, polypropylene yarn is preferably used, and its winding density is recommended to be, for example, about 10 to 100 μm. In the winding filter 82 of the illustrated example,
A winding density of about 10 to 20 μm was adopted. In addition to the winding filter, a non-woven fabric filter or a physical filter material such as zeolite or palm chit is appropriately used.

The bath water that has flowed into the physical filtration tank 42 through the inflow port 80a passes from the outer periphery of the winding filter 82 to the inner side in the radial direction of the filter, where the fine contaminants contained in the bath water are contained. Physical collection / filtration is performed. The bath water that has passed through the fine wire layer of the filter 82 exits into the hollow portion 84a through a large number of through holes 84b formed in the tubular core 84, and then through the outlet 80b that communicates with the hollow portion 84a. It flows out of the tank. Also, the filtration tank 4
A part of the bath water flowing into 2 flows out of the tank as it is without passing through the winding filter 82.
That is, a part of the bath water rises in an annular space defined between the inner wall surface of the casing and the outer peripheral surface of the filter in the physical filtration tank 42, collides with the inner top portion of the casing 80 and is inverted, and then the tubular shape is obtained. Hollow part 84a provided in the core 84
To flow out of the tank through the outlet 80b. By the way, the winding filter 82 is gradually clogged due to long-term use, and the water flow resistance of the bath water passing through the filter 82 also gradually increases. In this case, in the bath water that has flowed into the physical filtration tank 42, without passing through the filter 82 and the through hole 84b of the tubular core 84, as described above, it flows out of the tank through the annular space and the hollow portion 84a. The proportion of bath water also increases. That is, when the winding filter 82 is gradually clogged, the proportion of the bath water that bypasses the filter 82 and directly goes to the outflow port 80b also increases, so that the decrease in the circulation amount of the bath water when the filter is clogged is effectively prevented. It

In the physical filtration tank 42, a normally closed valve 88 is provided in the hollow portion 84a of the cylindrical core 84, and when the winding filter 82 is clogged and the water flow resistance is gradually increased, it is gradually increased. The normally closed valve 88 may be gradually opened by the increasing pressure of the bath water to bypass a part of the bath water to the hollow portion 84a. That is, in the tubular core 84 of the winding filter 82, as shown in FIG.
As shown in FIG. 7, a normally closed valve 88 that closes the upper opening of the hollow portion 84a by the elastic force of the compression spring 90 is provided. The elasticity of the compression spring 90 is such that when the filter 82 is gradually clogged and the water resistance that increases gradually exceeds a predetermined value, the water pressure acting on the normally closed valve 88 from the outside is applied to the compression spring 90. It is set so that 90 can be gradually compressed. Therefore, as the filter 82 is gradually clogged and the water flow resistance increases, the bath water gradually opens the normally open valve 88 as shown in FIG. As a result, part of the bath water is
Without being filtered by the winding filter 82, it flows into the hollow portion 84a from the upper opening of the hollow portion 84a in the core 84, and flows out of the tank through the hollow portion 84a and the outlet port 80b.

FIG. 8 shows another embodiment of the physical filtration tank 42. In the winding filter 82 loaded in the physical filtration tank 42, the winding pitch of the linear material 86 is coarse and dense. It is divided and wound so that it becomes a thing.
That is, the winding pitch of the upper half of the linear material 86 of the winding filter 82 is coarse, and the winding pitch of the lower half of the linear material 86 is dense. When the winding pitch of the linear material 86 is divided in this way, the passage resistance of water in the filter portion having a coarse winding pitch is smaller than that in the filter portion having a fine winding pitch. Therefore, during the filtration operation in the physical filtration tank 42, a partial difference occurs in the clogging of the winding filter 82 with time, and it is possible to adjust the time when the water flow resistance increases.

(About Electric Heating Tank) The electric heating tank 50 has an electric heater 92 therein, and the bath water supplied to the heating tank 50 by the circulation pump 44 is heated to an appropriate temperature by the heater 92. It The water level of the bath water in the electric heating tank 50 is monitored by the water level sensor 60 provided therein, and if it does not reach the reference water level, an error is displayed on the display 94 shown in FIG.
Stop the operation of 4. The temperature of the bath water supplied to the electric heating tank 50 is monitored by the temperature sensor 58 inserted in the inflow side conduit 48 of the heating tank 50, and the electric heater 92 is turned on based on the detection result of the sensor 58. Turn off to maintain bath water at temperature suitable for bathing. Further, whether or not the bath water is circulated is monitored by the flow rate sensor 56 inserted in the pipe 54 communicating with the downstream side of the physical filtration tank 42. Note that the electric heating tank 50 is indispensable when the circulation purification device according to the present invention is installed in the bathtub or the hot water pool of the illustrated example, but regarding the circulation purification device installed in a normal pool or the like, the electric heating tank is used. It is not necessary to provide 50.

(About Ozonizer) Electrolyzer 3 described above
The ozonizer 96 shown in FIG. 13 may be separately inserted in the pipe line system that connects the 8, microbial purification tank 40, the electric heating tank 50, and the physical filtration tank 42 to each other. As will be described later, ozone is also generated when the bath water is electrolyzed in the electrolytic bath 38, and the sterilizing action is achieved. However, by additionally using the ozonizer 96, sterilization can be performed more reliably. The location of the ozonizer 96 may be in a pipeline through which the bath water circulates, but it is desirable that the ozonizer 96 is disposed at a position that does not inhibit the action of the microorganisms inhabiting the inside of the microorganism purification tank 40. The bath water circulation line and the ozonizer 96
Is connected via a solenoid valve 99 shown in FIG.
When the solenoid valve 99 is opened, ozone is injected into the bath water in the pipeline, and when the solenoid valve 99 is closed, ozone injection into the bath water is stopped.

(Regarding Control Block of Device) FIG.
The block for individually controlling the electrical components of the circulation purification apparatus according to the present invention is schematically shown, and the flow rate sensor 56, the temperature sensor 58, and the water level sensor 6 described above in the control circuit 62.
0 is connected to input the respective detection information to the control circuit 62. The memory (RAM) 98 stores various kinds of information and command data necessary for automatically operating the circulation purification device, and exchanges signals with the control circuit 62. The solenoid valve 99 is opened and closed by a valve drive circuit 89 which receives a control command from the control circuit 62.
Driven by Similarly, the circulation pump 44 is driven by a pump drive circuit 45, and the electric heater 92 is driven by a heater drive circuit 93. The electrolytic cell 38 is driven by the electrolytic cell drive circuit 39, the ozonizer 96 is driven by the ozonizer drive circuit 97, and the display 94 is driven by the display drive circuit 95 in a timely manner.

(Operation of Circulation Purification Device) Next, the operation of the circulation purification device according to the embodiment thus configured will be described with reference to the flowchart shown in FIG. Prior to the operation of the purification device, the memory (RAM) 98 is
Setting of temperature value of bath water, setting of start / end time of electrolysis in electrolyzer 38, start of processing in ozonizer 96
It is assumed that the end time is set in advance. These set values input to the memory (RAM) are displayed on the display 94 so that they can be visually and easily confirmed. Further, it is assumed that bath water is stored in the bathtub 10 to a required level of filling water.

In step S ₁ of FIG. 12, it is confirmed whether or not an operation key (not shown) provided in the circulation purification device is turned on (ON), and if the result is affirmative (YES), the circulation pump 4
4 is driven, and the bath water in the bath 10 starts to circulate in the pipeline system shown in FIG. Then, the circulating pump 44 is driven and the next operation is awaited. During this standby, the process proceeds to step S ₂ to check whether the water level in the electric heating tank 50 is at the specified value. If the result is negative (NO), an error is displayed on the display 94 to drive the circulation pump 44. To stop.
The result goes to step S _3, if affirmative (YES), to check the flow rate of the bath water flowing through the conduit in the has reached a prescribed value, if the result is negative (NO), the process also display 9
An error message is displayed on 4 and the drive of the circulation pump 44 is stopped. If the result is affirmative (YES), the next step S ₄
Move to If the confirmation by the water level sensor 60 and the flow rate sensor 56 is affirmative (YES), the operation of the circulation pump 44 is continued, and the bath water from the bath 10 is electrolyzed by the electrolyzer 3.
After repeating the cycle of 8, the microorganism purification tank 40, the electric heating tank 50, and the physical filtration tank 42 in this order, the cycle of returning to the bath 10 again is repeated. The process of purification / filtration in the microbial purification tank 40 and the physical filtration tank 42 in this case will be described later.

In step S ₄ , it is confirmed whether or not the temperature of the bath water flowing into the electric heating tank 50 is lower than the value set in the memory (RAM) 98, and if the result is affirmative (YES), the electric heater 92. Is turned on to raise the water temperature in the heating tank 50.
If the result of step S ₄ is negative (NO), the electric heater 92 is turned off (OFF) and the process proceeds to step S ₅ . In this step S ₅ , it is confirmed whether or not the processing time in the electrolytic cell 38 previously set in the memory (RAM) 98 has come, and if the result is negative (NO), the electrolytic cell drive circuit 39 shown in FIG. Continues to be turned off (OFF), and the result is positive (YES)
If so, turn on the electrolytic cell drive circuit 39 to turn on the electrolytic cell 3.
8 starts the electrolysis action. The electrolysis process in this electrolysis tank 38 will be described later. Next, the process proceeds to step S ₆ and it is confirmed whether the processing time in the ozonizer 96 is reached. If the result is negative (NO), the ozonizer drive circuit 97 and valve drive circuit 89 shown in FIG. 13 are continuously turned off (OFF), and if the result is affirmative (YES), the ozonizer drive circuit 97 and valve drive circuit are driven. The circuit 89 is turned on to inject ozone into the bath water in the pipeline. Then, in step S ₇ , it is confirmed whether or not the operation key is turned off (OFF). If the result is negative (NO), the process returns to the previous step S ₂ and the above-mentioned confirmation work is repeated. The result of step S ₇ is positive
If YES, the operation of the circulation pump 44 is stopped.

(About Process in Electrolyzer) Bath water sucked from the bath 10 in FIG. 1 flows into the electrolyzer 38 and comes into contact with the anode 66 and the cathode 68 to which a required DC voltage is applied. Therefore, the bath water is electrolyzed to generate oxygen gas in the vicinity of the anode 66, and the hydrogen ion concentration of the bath water existing around the anode 66 becomes high and becomes acidic. Further, hydrogen gas is generated in the vicinity of the cathode 68, and the concentration of hydrogen ions in the bath water existing around the cathode 68 is lowered to become alkaline. Moreover, on the side of the anode 66, organic substances such as dirt and body fat contained in the bath water are oxidatively decomposed and become minute. Therefore, decomposition by microorganisms in the microbial septic tank 40 located in the next step is promoted. In addition, a part of the oxidatively decomposed organic matter becomes insoluble and aggregates in a colony state.

Further, in the vicinity of the anode 66, active oxygen is produced in the form of ozone (O ₃ ) or hydrogen peroxide (H ₂ O ₂ ). Therefore, various bacteria in the bath water are sterilized to a considerable extent by this active oxygen. Furthermore, since the vicinity of the anode 66 becomes strongly acidic and the vicinity of the cathode 68 becomes strongly alkaline due to electrolysis, the sterilizing effect is exhibited even by such a change in the hydrogen ion concentration (pH). The anode 66
Oxygen gas and acidified water generated in the vicinity of the
Hydrogen gas and alkalized water generated in the vicinity of 8 do not exist in a clearly separated state, but exist in a state where steam water is mixed in the bath water. The bath water, which is partially sterilized by this electrolytic decomposition and in which finely divided organic substances are aggregated, is supplied from the electrolytic cell 38 to the microbial purification tank 40 via the downstream pipe line 46.

When electrolysis is carried out in the electrolytic cell 38, the pH value in the vicinity of the cathode 68 rises due to the generation of alkaline water described above, and calcium ions and magnesium ions contained in the bath water are deposited on the surface of the cathode 68. To do.
When the surface of the cathode 68 is coated with these deposits in a layered manner as described above, there is a disadvantage that the electrolytic action is gradually reduced. Therefore, in the present embodiment, the amount of water flowing into the electrolytic cell 38 after the start of electrolysis is integrated and measured by the flow rate sensor 56, and when the measured value reaches the amount of water flowing preset in the memory (RAM). Cleaning is performed by applying a DC voltage of opposite polarity to the cathode 68 and the anode 66, and dissolving the deposit covering the cathode 68. It should be noted that instead of integrating the water flow rate of the bath water, the water flow time may be integrated as a function of polarity conversion in the electrodes.

(Regarding Process in Microbial Septic Tank) As described above, the microbial septic tank 40 is filled with an amount such that the PVA gel 74 in which microorganisms such as bacteria have been propagated and fixed in advance can freely flow by the inflow of bath water. Has been done. Therefore, when the bath water is supplied from the upstream electrolyzer 38 to the microbial purification tank 40 through the pipe line 46, the PVA gel 74 is violently moved by the flow of the bath water as shown in FIG. Bath water polluted by use is PVA gel 7
When it contacts 4, the microorganisms propagated and fixed on it decompose organic matter such as dirt and body fat in water to make sludge-like contaminated residue. In the present embodiment, the bath water supplied to the microbial septic tank 40 is considerably fined because it has undergone electrolysis in the upstream electrolyzer 38, and therefore the decomposition action by the microorganisms is effectively promoted. . The sludge-like contamination residue generated by the decomposition tends to adhere to the PVA gel 74 in a film form, but the PVA gel 74 is violently flowing in the tank, which makes the adhesion extremely difficult. If the pollutant is PVA
Even if it adheres to the gel 74, it is easily peeled off due to the flow of the gel. Therefore, the PVA gel 74 does not become clogged, and periodical maintenance such as cleaning processing and replacement of these PVA gels 74 becomes unnecessary. Further, since the PVA gel 74 flows violently, it is possible to secure a large effective contact area for the bath water supplied to the microbial septic tank 40, and it is possible to exert a sufficient purification power for the bath water.

Further, a part of the components of the PVA gel 74 tends to be eluted in the bath water, and the eluted components function as a coagulant for a part of the organic substances in the water and a part of the organic substances are aggregated. Leading to. Then, the partially aggregated organic matter is dispersed and mixed in the bath water together with the organic matter which is not decomposed by the microorganisms and the sludge-like pollution residue generated by the decomposition. In this example, since the PVA gel 74 used was one in which microorganisms were entrapped and fixed,
It is not necessary to wait for the microorganisms to propagate in the PVA gel 74 filled in the microorganism purification tank 40, and the ability of the microorganisms to purify organic substances can be sufficiently exhibited from the beginning of use. That is, since the organic substances are sufficiently decomposed from the beginning of the installation of the circulation purifying device, the bath water can be enjoyed bathing with clean bath water without causing turbidity or sliminess of the bath water at the beginning. However, even with PVA gel 74 that has not been subjected to entrapping immobilization of microorganisms, the elution of gel components has the effect of aggregating some organic substances as described above, so even before the microorganisms proliferate. The purification effect of is obtained.

(Regarding Process in Electric Heating Tank) The bath water in which the organic substances have been purified in the microbial purification tank 40 is supplied to the electric heating tank 50 via the conduit 48 in which the temperature sensor 58 is installed. The temperature sensor 58 measures and monitors the temperature of the bath water passing through the pipe 48, and the detection result of the sensor 58 is shown in FIG.
If it is lower than the set value in the memory (RAM) 98 shown in FIG. 2, the control circuit 62 controls the heater drive circuit 93 to turn on the electric heater 92. On the contrary, when the detection result of the temperature sensor 58 is higher than the set value in the memory (RAM) 98, the control circuit 62 controls the heater drive circuit 93 to turn off the electric heater 92. In this way, the bath water in the electric heating tank 50 is always maintained at a temperature suitable for bathing.

The bath water that has passed through the electric heating tank 50 (with respect to the process in the physical filtration tank) flows into the physical filtration tank 42 through the pipe line 52. Then, as shown in FIG. 5, most of the bath water flowing from the inflow port 80a of the physical filtration tank 42 is
From the outer periphery of the winding filter 82, it passes inward in the radial direction of the filter, where fine contaminants contained in the bath water are physically collected and filtered. Further, a part of the bath water flowing into the physical filtration tank 42 rises in an annular space defined between the inner wall surface of the casing of the physical filtration tank 42 and the outer peripheral surface of the filter 82, and is inverted at the inner top of the casing. Then, the hollow portion 84a of the tubular core 84 descends and flows out of the tank as it is from the outlet 80b. That is, the organic substances remaining without being decomposed in the electrolytic tank 38 and the microbial purification tank 40, and the sludge-like pollution residue and other insoluble organic substances generated by the decomposition are collected and filtered by the filter 82, and as a result, the physical filtration tank 42 is obtained. Purified bath water is obtained at the outlet 80b. The purified bath water passes from the physical filtration tank 42 through the pipe line 54 and the drain hose 18 to the bath 10.
Be returned to. In addition, part of the bath water is bypassed without passing through the winding filter 82 as described above,
It joins with the purified bath water at the outlet 80b.

As described above, the filter 82 gradually becomes clogged with its use, and the water resistance gradually increases. When the water resistance gradually increases in this manner, the amount of bath water that has been filtered through the filter 82 in the bath water that has flowed into the physical filtration tank 42 bypasses the filter 82 and flows. The proportion of the bath water that goes directly to the outlet 80b increases. Therefore, the decrease in the circulation amount of the bath water due to the clogging of the filter 82 is effectively prevented. Further, as described with reference to FIGS. 6 and 7, the normally closed valve 88 is provided in the hollow portion 84a of the tubular core 84, and when the winding filter 82 is gradually clogged and the water flow resistance increases, the water resistance increases accordingly. The normally closed valve 88 may be gradually opened against the elasticity of the spring 90 by the pressure of the bath water to bypass the bath water to the hollow portion 84a. Further, as described with reference to FIG. 8, the winding pitch of the linear material 86 in the winding filter 82 is set to
If the filter 82 is divided into a coarse one and a dense one, a partial difference occurs in the clogging of the filter 82 with time.
It is preferable because the water flow resistance does not increase at once. An increase in water flow resistance in the filter 82 is detected by, for example, the above-described flow rate sensor 56, and the detected value is compared with the allowable resistance value stored in the memory (RAM) 98 to determine the replacement time of the filter 82. The display 9
You may make it notify to a user by 4.

(Regarding Modifications of Each Configuration) The configuration of the present invention is not limited to the above-described embodiment,
Various changes can be made without departing from the spirit of the invention. For example, as shown in FIGS. 2 and 3, the microorganism purification tank 40, the electrolytic tank 38, the electric heating tank 50, and the physical filtration tank 42 may be arranged in this order in the flowing direction of the bath water.
In this case, the electrolytic bath 38 capable of performing the sterilizing action is the bath 10.
Since it is located close to, the number of bacteria and microorganisms contained in the bath water returning to the bathtub 10 can be further reduced,
It is possible to more effectively suppress the occurrence of slime. The active oxygen (hydrogen peroxide) generated in the vicinity of the anode 66 by electrolysis in the electrolytic cell 38 has the ability to kill not only the bacteria contained in the bath water but also useful microorganisms that decompose organic substances. There is. Therefore, when the electrolytic cell 38 is arranged on the upstream side of the microbial purification tank 40 as shown in FIG. 1, the bath water containing the active oxygen flows into the microbial purification tank 40, and the useful microorganisms propagated and fixed on the PVA gel 74 are fixed. There is also concern that it will be destroyed. Of course, the lifetime of active oxygen is extremely short,
Even in the case of the example shown in FIG. 1, there is no problem if the electrolytic cell 38 and the microbial purification tank 40 are properly separated. However, as shown in FIG. 2 and FIG. 3, if the microbial septic tank 40 is arranged on the upstream side of the electrolytic bath 38, the microbial septic tank 40 and the electrolytic bath 38 can be installed very close to each other, and the entire apparatus can be installed. It can contribute to compactification.

In the electrolytic cell 38 shown in FIG. 2, the inflow side pipe line 48 and the outflow side pipe line 46 are shown by a two-dot chain line line 49.
Alternatively, a part of the bath water may flow into the downstream electric heating tank 50 without passing through the electrolytic tank 38. This is effective in reducing the distance between the electrodes in the electrolytic cell 38. That is, in the electrolytic bath 38, by narrowing the distance between the electrodes 66, 68, electrolysis of bath water can be more efficiently performed by applying a low voltage DC. According to this, it is possible to reduce the load on the DC power source, and there is no fear of an electric shock accident, so that safety is improved. However, on the other hand, there is a problem in that the flow path resistance of the bath water in the electrolytic cell 38 increases, and the load on the circulation pump 44 increases conversely. In such a case, if the bypass conduit 49 is provided on the inflow side to the electrolytic cell 38 as described above, the overall flow path resistance can be suppressed low, and in addition to reducing the load on the DC power supply, The load on the circulation pump 44 can also be reduced.

Further, in the physical filtration tank 42 shown in FIG. 3, the inflow side conduit 52 and the outflow side conduit 54 are bypassed by the conduit 51 so that a part of the bath water passes through the physical filtration tank 42. Instead, it may be configured to flow into the downstream bathtub 10. This is the filter 82 provided in the physical filtration tank 42.
Is a solution to the problem that the amount of bath water flowing out from the filtration tank 42 decreases and the load on the circulation pump 44 increases when the water resistance increases as time passes. That is, if the bypass conduit 51 is provided on the inflow side to the physical filtration tank 42, the overall flow path resistance can be suppressed to a low level, so that the decrease in the amount of bath water returning to the bath 10 is prevented, Therefore, the load on the circulation pump 44 can be reduced.

[0038]

As described above, according to the circulation purifying apparatus of the first aspect of the present invention, the contaminated liquid is electrolyzed by the energization of the electrolyzing means, active oxygen is generated, and sterilization is performed. Organic substances in the contaminated liquid are oxidatively decomposed. The microbial purification means decomposes the organic matter contained in the contaminated liquid by microorganisms to purify the liquid. The physical filtration means collects and filters sludge-like contaminated residues generated from decomposed organic substances and organic substances that have not been decomposed. These electrolysis means, microbial purification means and physical filtration means work together to sterilize the contaminated liquid, decompose organic substances contained in the liquid, and filter contaminated residues and undecomposed organic substances, etc. Clean cleaning is achieved. Further, according to the circulation purification apparatus of the second aspect of the present application, the contaminated liquid is electrolyzed by energizing the electrolytic cell, active oxygen is generated and sterilized, and the organic matter in the contaminated liquid is oxidatively decomposed. . In the microbial septic tank, microorganisms present in the granular synthetic polymer gel decompose the organic matter contained in the contaminated liquid to purify the liquid. The physical filtration tank collects and filters sludge-like polluted residues produced from decomposed organic substances and organic substances that have not been decomposed. The electrolytic cell, the microbial purification tank, and the physical filtration tank work together to sterilize the contaminated liquid, decompose organic substances contained in the liquid, and filter contaminated residues and undecomposed organic substances to efficiently clean the contaminated liquid. Is achieved.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a basic configuration of a circulation purification device according to a preferred embodiment of the present invention.

FIG. 2 is a schematic view of a circulation purification device according to another preferred embodiment of the present invention.

FIG. 3 is a schematic view of a circulation purification device according to still another preferred embodiment of the present invention.

FIG. 4 is a vertical sectional view showing a schematic structure of a microbial septic tank.

FIG. 5 is a vertical sectional view showing a schematic structure of a physical filtration tank.

6 is a partial cross-sectional view showing a state in which a normally closed valve is provided in the filter of the physical filtration tank shown in FIG. 5, in which the valve body is closed by spring pressure.

7 is a partial cross-sectional view showing a state in which a normally closed valve is provided in the filter of the physical filtration tank shown in FIG. 5, and as a result of the water pressure pushing down the valve body against the spring pressure, the valve body is It is open.

FIG. 8 is a vertical cross-sectional view of a physical filtration tank in which a filter is divided into a coarse filter and a dense filter.

FIG. 9 is a vertical sectional view showing a schematic structure of an electrolytic cell.

FIG. 10 is a schematic perspective view showing a state in which the circulation purification device for polluted liquid according to the present application is installed in a bathroom.

FIG. 11 is a vertical cross-sectional view showing a water supply / drainage unit that constitutes a part of the circulation purification device in a state where the water supply / drainage unit is attached to the inner wall surface of the bath.

FIG. 12 is a flowchart showing a control flow of the circulation purification device.

FIG. 13 is a schematic diagram showing a control block that can individually control electrical components of the circulation purification device.

[Explanation of symbols]

 10 Bathtub 12 Bath water 14 Water supply / drainage unit 16 Water absorption hose 18 Drainage hose 20 Equipment body 22 Earth leakage breaker 24 Cable 26 Earth cable 28 Suction cup 30 Box case 32 Water inlet 34 Discharge port 36 Filter 38 Electrolytic cell 39 Electrolytic cell drive circuit 40 Microbial purification tank 42 Physical filtration tank 44 Circulation pump 45 Pump drive circuit 46 Pipe line 48 Pipe line 50 Electric heating tank 52 Pipe line 54 Pipe line 56 Flow rate sensor 58 Temperature sensor 60 Water level sensor 62 Control circuit 64 Box casing 66,68 Electrode section 70 Cylindrical Casing 70a Inlet 70b Outlet 72 Tubular water channel 74 Synthetic polymer gel (PVA gel) 76 Filter 78 Water retention part 80 Cylindrical casing 80a Inlet 80b Outlet 82 Winding filter 84 Cylindrical core 84a Hollow part 84 b through hole 86 linear material 88 normally closed valve 89 valve drive circuit 90 compression spring 92 electric heater 93 heater drive circuit 94 display 95 display drive circuit 96 ozonizer 97 ozonizer drive circuit 98 memory (RAM) 99 solenoid valve

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical display location C02F 1/461 B01D 35/02 J 1/463 C02F 1/46 101C 1/465 102 3/08 ZAB

Claims (16)

[Claims] 1. A circulation purification device for a contaminated liquid, wherein a liquid contaminated with time is stored in a liquid storage means, and the contaminated liquid is circulated and pumped outside the storage means for purification and sterilization. Microorganism purification means for decomposing and purifying organic matter contained in the contaminated liquid with microorganisms, electrolysis means for electrolyzing this contaminated liquid to promote oxidative decomposition of the organic matter, and trapping pollutants contained in the contaminated liquid. A physical cleaning means for collecting and filtering, wherein each of these means is connected and connected in the circulation path of the contaminated liquid. 2. A circulation purification device for a contaminated liquid, wherein a liquid contaminated with time is stored in a liquid storage tank, and the contaminated liquid is purified and sterilized while being circulated by a pump outside the storage tank. A microbial septic tank filled with a granular synthetic polymer gel containing microorganisms that adsorb and decompose organic matter contained in the contaminated liquid to purify it, and promote oxidative decomposition of the organic matter by electrolyzing the contaminated liquid. And a physical filtration tank for collecting and filtering the pollutants contained in the contaminated liquid, each of these tanks being connected in communication in the circulation path of the contaminated liquid. Circulation purification device. 3. The circulating purifying apparatus for polluted liquid according to claim 2, wherein the filling amount of the synthetic polymer gel is adjusted so that the polluted liquid flowing into the microorganism purification tank can freely flow. 4. The circulating purification apparatus for contaminated liquid according to claim 2 or 3, wherein the synthetic polymer gel is entrapped with microorganisms that adsorb and decompose organic substances. 5. The microbial septic tank is provided with an inflow port and an outflow port for a contaminated liquid, and a mesh filter for preventing the granular synthetic polymer gel from flowing out is disposed at the inflow port and the outflow port. Item 5. A circulation purification device for contaminated liquid according to any one of items 2 to 4. 6. The circulation of the contaminated liquid according to claim 2, wherein the inflow path of the contaminated liquid to the physical filtration tank is provided with a bypass flow path that is connected to a downstream side while avoiding the physical filtration tank. Purification device. 7. The physical filtration tank is loaded with a winding filter, which is obtained by winding a linear material around a core having a large number of through holes in a hollow portion, as a filtering material, and the contaminated liquid flowing into the physical filtration tank is Mainly flows into the filter from the outer periphery, is filtered and then flows out through the through hole and the hollow portion of the core, and as the water flow resistance in the filter increases, without passing through the through hole of the filter and the core. 7. The contaminated liquid circulation purification apparatus according to claim 2, wherein the ratio of the contaminated liquid flowing out only from the hollow portion is also increased. 8. The winding core of the winding filter is provided with a valve element at one of its openings which constantly opens the opening with spring pressure, and as the filter becomes clogged, the resistance at the passage of liquid increases. The pressure of the contaminated liquid flowing into the physical filtration tank also gradually increases, and with this increase in pressure, the valve body gradually opens against the spring pressure, without passing through the through hole of the filter and the core. 8. The circulating purification apparatus for polluted liquid according to claim 2, wherein the proportion of the polluted liquid flowing out from the opening only through the hollow core portion is increased. 9. The winding filter is divided so that the winding pitch of its linear material is coarse and dense, and the liquid passage resistance increases with the clogging of the filter over time. Claim 2 wherein the timing can be adjusted,
6. The circulating purification apparatus for contaminated liquid according to any one of 6, 7, and 8. 10. The circulation purification device for polluted liquid according to claim 2, wherein a bypass flow passage is provided in an inflow passage of the polluted liquid to the electrolytic bath so as to avoid the electrolytic bath and communicate with a downstream side. . 11. The electrolytic cell is provided with two electrode portions, one electrode portion functions as an anode and the other electrode portion functions as a cathode.
0. A circulating purification apparatus for polluted liquid according to any one of 0 to 5. 12. The two electrode parts in the electrolytic cell are
The polarities can be alternately switched according to the amount and time of passage of the contaminated liquid.
The circulating purification apparatus for polluted liquid according to any one of 1. 13. The contaminated liquid circulation purification apparatus according to claim 2, wherein the electrolytic cell, the microbial purification tank, and the physical filtration tank are sequentially arranged in a direction in which the contaminated liquid circulates. 14. The circulating purification apparatus for polluted liquid according to claim 2, wherein the microbial purification tank, the electrolysis tank, and the physical filtration tank are sequentially arranged in a direction in which the polluted liquid circulates. 15. The polluted liquid according to claim 2, wherein an ozone generator is provided at an appropriate position of a liquid circulation path that connects the electrolytic bath, the microbial purification bath, and the physical filtration bath. Circulation purification device. 16. The contaminated liquid according to claim 2, wherein an electric heating tank for heating and raising the temperature of the contaminated liquid is provided at an appropriate position of a liquid circulation path that connects the electrolytic cell, the microbial purification tank and the physical filtration tank. Circulation purification device.