JPH09155375A - Bath water circulating and purifying apparatus and tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the org. matter decomposing capacity by enhancing the contact efficiency of the bacteria layer on the surface of a granular bacteria supporting material with a pollutant component. SOLUTION: The bath water 3 in a bathtub 1 is filtered by a filter 7 to remove an insoluble substance and introduced into a biological purifying tank 6 wherein a support material 6 of purifying bacteria is housed by a pump 5. The inflow part of the biological purifying tank 6 is opened to the bottom part separated from the center thereof of the tank 6 and the support material 9 is circulated up and down along with the bath water 3 within the purifying tank 6 or revolved along the wall of the purifying tank 6 to enhance the contact efficiency of the bacteria layer on the surface of the support material 9 with a pollutant component to purify the bath water. The purified bath water is heated to proper temp. by a heater 12 to be returned to the bathtub. The support material 9 is always circulated along with the bath water 3 within the purifying tank 6 and soluble org. matter is efficiently oxidized and decomposed to purify the bath water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath water circulation purification apparatus and a bath water circulation purification tank, and more specifically, a bath water circulation purification apparatus for purifying bath water by utilizing the decomposition action of microorganisms on organic substances. The present invention relates to a bath water circulation purification tank suitable for use in the bath water circulation purification device.

[0002]

2. Description of the Related Art A bath water circulation purification apparatus utilizing the action of microorganisms for decomposing organic substances has been widely put to practical use because it is easy to handle, the apparatus can be simplified, and no special chemicals are required. There is.

The bath water circulating and purifying device is provided with a microbial septic tank in a pipe system for circulating the bath water, and the microbial septic tank is filled with a porous material or the like for supporting microorganisms. Part of the insoluble polluted organic components and soluble polluted organic components in the circulating bath water that is the water to be treated are decomposed and consumed mainly by the microorganisms immobilized on the surface and inside of the porous material or the like filled in the septic tank, Water quality is being purified.

In such a purification device, the microorganisms to be purified usually grow spontaneously in the circulation system of the bath water. That is, the microorganisms present in the circulation system of water are usually the substrate in the circulation bath water, here, the pollutant components present in the bath water to be purified,
The microorganisms that gradually grow while utilizing dissolved oxygen and the like grow and adhere to the immobilizing carrier material provided inside the septic tank to be immobilized, and further continue to grow on the surface and inside the carrier material.

In general, the more microorganisms that decompose organic substances, the higher the biodegradability in the circulation system.
In order to maintain the purification performance of such an apparatus, it is important that a certain amount or more of the supporting material is present inside the septic tank and that a sufficient amount of microorganisms be immobilized on the supporting material.

However, when the purification microorganisms continue to proliferate in the septic tank of such an apparatus, surplus microorganisms generated in the process of proliferation gradually accumulate in the inner wall of the septic tank, the surface of the supporting material, and the gap formed between the supporting materials. To be done. Further, a part of the insoluble pollutant component existing in the bath water is gradually accumulated on the inner wall of the septic tank, the surface of the supporting material and the gap between the supporting materials without being decomposed by the microorganisms.

If these excess microorganisms and insoluble pollutant components are excessively accumulated in the septic tank, the flow of the circulating bath water in the purifier tank becomes uneven, and the microorganisms fixed to the carrier material and the pollutant components come into contact with each other. Since there are places where efficiency is insufficient,
The ability of aerobic microorganisms, which are the main components of purification of such devices, to decompose organic substances is reduced, and anaerobic microorganisms are excessively proliferated, which may cause pollution of bath water or offensive odor.

In order to solve these problems, a cleaning mechanism for mechanically stirring the carrier material is added to the septic tank to remove excess microorganisms and insoluble pollutant components on the surface of the carrier material, thereby suppressing accumulation. Has been proposed and some have already been put to practical use.

However, since the supporting material that is often used in the bath water circulation system is generally a porous inorganic material, extremely strong stirring force is required at the time of the closest packing, and the supporting material or the cleaning mechanism itself is destroyed. Therefore, if such a mechanical stirring mechanism is used for the purpose, a complicated mechanism for preventing the destruction of the carrier material and a drive system capable of strong stirring are added to the septic tank. Will be required. Therefore, in reality, a mechanism is provided for stirring only a part of the carrier material filled in the septic tank, or a method of intermittent stirring or backwashing is adopted.

FIG. 13 is a view for explaining a conventional septic tank to which a mechanical stirring mechanism is added. In the figure, 31 is a septic tank casing, 32 is a carrying material, 33 is a stirring section, 34 is a motor, and the septic tank casing is shown. Bath water inflow part 3 at the top of 31
1a is provided with a bath water discharge port 31b at the bottom and is filled with a carrier material 32 such as granular ceramics inside, and a stirring unit 33 connected to a motor 34 is rotated to support the surrounding carrier. Material 32 is agitated and mixed. If the radial length of the stirring unit 33 is too large, the stirring unit 3
Since the load applied to 3 becomes too large, an appropriate length is selected according to the carrier material 32 used. The excess pollutant separated from the carrier material is discharged to the outside of the system by switching the flow path of the circulation system.

[0011]

However, it is often difficult to uniformly stir and mix the entire septic tank casing with the system in which only a part of the carrier material filled in the septic tank is agitated. In addition, it is practically difficult to sufficiently remove excess contaminants from the septic tank, and when intermittent stirring is performed, accumulated deposits may be mixed into the bath in a lump form, which causes a problem. Often becomes.

The present invention has been made in view of the above-mentioned circumstances, and a supporting material to which microorganisms having an organic substance decomposing action are adhered is circulated together with bath water.
An object of the present invention is to provide a novel bath water circulation purification device capable of maintaining the organic substance decomposing ability of a supporting material without requiring a mechanical stirring mechanism, and a bath water circulation purification tank suitable for use in the bath water circulation purification device. It is what

[0013]

According to a first aspect of the present invention, there is provided a bath water suction unit for sucking bath water in a bath, and a pump for supplying the bath water to the bath water circulation purification tank through the bath water suction unit. , The bath water circulation purification tank for circulating the particulate purification microorganism supporting material together with the bath water supplied to the bath water circulation purification tank in the bath water circulation purification tank, and the bath water flowing out from the bath water circulation purification tank is discharged to the bath tank It consists of a water pipe.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided a water supply pipe for returning a part or all of the bath water fed to the bath water circulation purification tank via the bath water suction section to the bath. I have.

According to a third aspect of the invention, in the first or second aspect of the invention, there is provided an outside air introducing means for introducing outside air into the water supply pipe passing through the pump.

The invention of claim 4 comprises a septic tank casing having an inflow portion and a discharge portion of bath water, and a supporting material for immobilizing microorganisms decomposing an organic substance contained in the septic tank casing. Is a granular body having substantially the same specific gravity as the bath water in the bath water, and the granular body is circulated in the septic tank casing together with the bath water supplied from the bath water inflow section and discharged from the discharge section. It was made to be done.

According to a fifth aspect of the invention, in the fourth aspect of the invention, the bath water is vertically circulated together with the carrier material in the septic tank casing.

According to a sixth aspect of the invention, in the fourth aspect of the invention, the bath water is made to flow in a spiral shape together with the supporting material in the septic tank casing.

According to a seventh aspect of the present invention, in the fourth to sixth aspects, an intermediate wall having a mesh for preventing passage of the carrier material is provided on the upper part of the septic tank casing.

According to the invention of claim 8, in the invention of claim 7, the intermediate wall has a convex shape on the upper side, and the mesh is provided on the uppermost part thereof.

According to a ninth aspect of the present invention, in the invention of the fourth to eighth aspects, the septic tank casing is made of a flexible material that expands into a desired shape when bath water is introduced into the casing. .

According to a tenth aspect of the present invention, there is provided a tubular body having a vertical axial direction, the tubular body being disposed at a position separated from the center of the bottom, and the bath water flowing in in the direction parallel to the axis, and the top of the tube. A septic tank casing having a discharge part for discharging the bath water, and a granular body housed in the septic tank casing and having substantially the same specific gravity as the bath water. The bath water and the supporting material that have flowed in are circulated in the vertical direction so that the bath water flows out.

According to the invention of claim 11, in the invention of claim 10, the lower side wall of the septic tank casing has a bath water introducing portion for flowing the supporting material toward the bath water introducing portion. .

According to a twelfth aspect of the present invention, there is provided a cylindrical body having a vertical axial direction, and the lower side wall is provided with an inflow section and a tube top section in which the bath water flows along the side wall. The inflow is composed of a septic tank casing having a discharge part for discharging the bath water, and a carrier material housed in the septic tank casing and for immobilizing microorganisms having substantially the same specific gravity as the bath water in the bath water. The bath water and the supporting material that have flowed into the septic tank casing from a portion are swirled and flow out from the outflow portion.

According to a thirteenth aspect of the present invention, a cylindrical body whose axial direction is vertical is arranged at the center of the bottom part, and is arranged at the inflow part and the cylinder top part for inflowing the bath water in the direction parallel to the axis. A septic tank casing having a discharge part for discharging the bath water, and a granular body housed in the septic tank casing and having substantially the same specific gravity as the bath water and flowing into the septic tank casing. The bath water and the supporting material are made to flow out while circulating in the vertical direction.

The invention of claim 14 is the invention of claim 10 or 13.
In the invention, the concave surface is formed so that the bath water introducing portion at the bottom of the cylindrical body is the lowest.

According to a fifteenth aspect of the present invention, there is provided a tubular body having a horizontal axial direction, an inflow portion into which the bath water flows in along a tubular wall near one end surface, and an upper surface of the tubular wall near the other end surface. A septic tank casing comprising a discharge part for discharging the bath water, and a carrier material that is housed in the septic tank casing and immobilizes microorganisms with a granular material having a specific gravity similar to that of the bath water,
The bath water and the supporting material flow in the septic tank casing while swirling around the axis.

[0028]

1 is a view for explaining an embodiment of a bath water circulation purifying apparatus according to the present invention, in which 1 is a bath, 2 is a first water pipe, 3 is bath water, Reference numeral 4 is a bath water inlet, 5 is a pump, 6 is a bath water circulation type biological septic tank, 7 is a filter, 8 is an air inlet, 9 is a supporting material for purifying microorganisms (hereinafter referred to as a supporting material), and 10 is a second Is a water supply pipe, 11 is an outlet, 12 is a heater, 13 is a three-way switching valve, and 14 is a third water supply pipe. The three-way switching valve 13 and the third water supply pipe 14 adjust the flow velocity of the bath water, and are provided as needed.

The first water pipe 2 and the second water pipe 10
The third water pipe 14 and the third water pipe 14 can be changed to a bath water circulation path composed of 2 ', 10', 14 'as shown by the dotted line in FIG. 1 (the invention of claim 1). The air inlet 8 may also be provided in the second water supply pipe or the third water supply pipe 3, but its operation will be described with reference to the bath water circulation path indicated by the solid line in FIG. Since it can be fully understood, description will be given below according to the circulation path indicated by the solid line in FIG.

The bath tub 1 is of a type which is made of metal such as stainless steel, enamel, plastic, concrete, wood, etc. and is used in ordinary households. Of course, those having heating means such as an outer pot and an inner pot may be used. One end of the first water supply pipe 2 is immersed in the bath water 3 in the bathtub 1, and the other end is connected to the biological septic tank 6 via the bath water inlet 4, the pump 5 and the three-way switching valve 13, The water 3 is sucked and supplied to the biological septic tank 6. The bath water suction port 4 is provided with an appropriate opening (not shown) that does not cause suction resistance, and the bath water suction port 4 is provided with a filter 7 at the tip thereof. The filter 7 is for preventing relatively large insoluble substances such as sand, hair, and a part of insoluble organic matter from entering the circulation system, and may be, for example, a sponge or a non-woven fabric, In particular, the material does not matter as long as it is not suitable for bath water. Also, the first water pipe 2
The material is not limited to stainless steel, brass, plastic, etc., as long as it can withstand the atmosphere in the bathroom.

An air inlet 8 is opened in the first water supply pipe 2, and the air inlet 8 takes in air into the bath water 3 by the negative pressure of the pump 5, and is fixed to the carrier material 9. Promotes the growth of purification microorganisms. The air inlet 8 is
It may be arranged on the downstream side of the pump 5, but in this case, it is necessary to join by using some means. The inside of the biological septic tank 6 is filled with a granular support material 9 having a specific gravity similar to that of the water supply, in which the microorganisms are supplied. The material of the biological septic tank 6 may be rust-prevented metal, or may be a plastic molded product or a soft material such as plastic that maintains the above shape by water pressure. When a soft material is used, At the time of use, it can be stored in a flat bag shape and can be stored in a very small space. Further, it can be stored in a refrigerator or the like in a state in which a supporting material supporting microorganisms is enclosed.

At the outlet of the biological septic tank 6, the second water pipe 1
0 is connected to one end, and the other end of the second water pipe 10 is connected to the bathtub 1
Open inside and send purified bath water. The heater 12 is
It is provided in the second water supply pipe 10 and has a function of increasing and maintaining the temperature of the bath water that drops by circulation. In addition,
Electric power, gas, kerosene, a heat exchanger, etc. can be used as the heat source of the heater 12. When the operation of the bath water circulation purifying device is started, the supporting material 9 in the biological septic tank 6 is circulated inside the bath water 3 containing air while the purifying microorganisms having a purifying ability are immobilized and proliferating on the supporting material 9 to form a bath. The polluted components in the water 3 are decomposed by the action of these purification microorganisms. The bath water discharged from the pump 5 is appropriately switched by the three-way switching valve 13, a part of the switched bath water 3 flows to the biological septic tank 6 via the second water supply passage 2, and the rest is the third. It is returned to the bathtub 1 via the water pipe 14 and the outlet 11. In this way, the bath water 3 is switched as needed by the three-way switching valve 13 so that all or part of the bath water 3 flows into the biological purification tank 6 or the bath 1. The amount of inflow into the septic tank 6 is increased and reduced when the specific gravity is low so that uniform mixing can be maintained, or most of the bath water is returned to the bath 1 and the inside of the bath 1 is aerated to aerate the bath 1. The amount of dissolved oxygen inside is secured.

The method of constantly stirring and mixing the carrier material 9 with circulating bath water is an important factor affecting the resolution of pollutant components in the bath water 3, but it depends on the kind of the carrier material 9 used, and there are two methods. Can be roughly divided into That is, when the supporting material is ceramics, glass or the like and has a high specific gravity with respect to water, the circulating bath water flow is caused to flow upward into the septic tank along the central axis of the biological septic tank 6 to stir and mix. Is the most effective. Thus, in the present invention, it is essential to constantly stir and mix the supporting material 9, but in order to constantly stir and mix the above high specific gravity supporting material 9, bath water is used at a high flow rate and a high flow rate. It is necessary to circulate, the equipment becomes large-scale, the energy used becomes large, and since the supporting material 9 is agitated and mixed while receiving a strong force, there is a high risk of destruction, and such high specific gravity. There are many disadvantages in using the carrier material 9 of No. 1 as a circulating bath water purifying apparatus used in general households.

On the other hand, when the supporting material 9 has a low specific gravity with respect to water, such as a lightweight inorganic material, plastic, various foams, fiber moldings, etc., the flow rate and flow velocity of the circulating bath water may be relatively small, so that the apparatus Since the size and weight of the bath water can be reduced and the inflow direction of the circulating bath water into the biological purification tank 6 is relatively large, the supporting material 9 having a low specific gravity can be used in the biological purification tank 6 of the bath water circulating purification apparatus. It is a suitable material.

Most of the circulating bath water purifying apparatuses currently used use the inorganic carrier material 9 having a high specific gravity, and although the present invention does not exclude the use of these inorganic carrier materials 9. Since the effects of the present invention are further enhanced by using the low specific gravity supporting material 9, the embodiments of the present invention will be described in detail below, focusing on the case where the low specific gravity supporting material 9 is used. First, a bath water circulation septic tank mainly using a supporting material having a specific gravity slightly higher than that of water will be described.

FIG. 2 is a view for explaining an embodiment of a bath water circulation septic tank according to the present invention, in which 21 is a septic tank casing, 22 is a microorganism supporting material, and 23 is a bottom portion.
Reference numeral 24 is an inlet, 25 is an intermediate wall, 26 is a mesh, and 27 is an outlet. In the following drawings, parts having the same functions as those in FIG. 2 are designated by the same reference numerals as those in FIG.

The septic tank casing 21 is formed by vertically arranging cylindrical ones, and in order to stabilize the flow of the bath water inside the septic tank, an intermediate wall 25 is provided in the upper part of the casing, and a bath is provided on the top thereof. A mesh 26 is provided which allows water and air to flow and prevents the carrier material from flowing out. In addition, the cylindrical bottom portion 23 has a bath water inflow portion 24 at a position separated from the center.
Is provided so that the bath water introduced into the casing 21 is circulated in the casing 21 in the arrow R _v direction. The septic tank casing 21 may be made of plastic, glass, metal such as stainless steel, or one that can maintain its initial shape without being deformed by water pressure, or a deformable plastic film. The support material 22 is a granular porous material such as an inorganic material, an organic material / calcined product, a foam, or a fiber having a specific gravity slightly higher than that of water, and has a high specific surface area to support microorganisms at a high density. Therefore, in the purification casing 21, the supporting material 22 flows together with the bath water flowing from the inflow portion 24, and the separation of microorganisms can be suppressed even when they are mixed with each other. The circulating bath water flows in the upward direction along the central axis of the cylinder by passing through the inflow portion 24. Along with that, the microbial carrier material 22 in the septic tank is
While riding on the inflowing bath water flow in the direction of arrow R _v ,
Stir and mix. In order to increase the linear velocity of the inflowing bath water, a part of the inner diameter of the bathing water inflow portion 24 may be smaller than the inner diameters before and after that.

The inflowing bath water is discharged from the bath water discharge portion 27 through the mesh 26 of the intermediate wall 25 provided above the septic tank casing 21. At this time, the bath water and the supporting material 22 are not separated from each other. Then, it moves toward the cylindrical bottom portion 23 and circulates in the vertical direction as shown by the arrow R _V.
The openings of the mesh 26 have a relatively large area to prevent the circulation amount from decreasing, and to prevent the carrier material 22 from flowing out of the septic tank, for example, a mesh smaller than the particle size of the carrier material 22 made of stainless steel. It is composed of. In such a septic tank casing 21, most of the bath water is discharged in a short residence time.
May fall out of the bath water flow and settle toward the bottom of the septic tank under its own weight. In addition, since the mixing efficiency decreases when air remains in the septic tank, the mesh 26 is formed, for example, by forming the intermediate wall 25 in a convex shape upward so that the air does not remain in the circulation tank, and the uppermost portion thereof. It is advisable to provide the mesh on the (see, for example, FIG. 3).

As described above, according to the present bath water circulation septic tank, the carrier material 22 circulates in the direction of the arrow together with the bath water and makes efficient contact with the bath water, but the specific gravity of the carrier material 22 changes and the water content changes. When heavier, the support material 22 cannot flow according to the normal circulation flow indicated by the arrow R _v , and may stay at the bottom opposite to the inflow portion 24.
The inflow portion 28 is provided to prevent such retention of the supporting material.
Is provided, the carrier material 22 retained by the flow of the bath water from the inflow section 28 is carried to the inflow section 24 side, and the carrier material 22 is moved according to a normal circulation flow, whereby efficient stirring can be achieved. The mounting position of the inflow part 28 is
It is not uniquely determined, but is determined by the shape of the septic tank casing 21, the state of the carrier material 22, the flow velocity and the flow rate of the inflowing bath water, and one or more may be provided in addition to the inflow portion 28.

FIG. 3 is a sectional view of an essential part for explaining another embodiment of the present invention. As described above, when the bottom surface of the bath water circulation purifying tank is formed flat, a part of the supporting material is Although it may stay on the bottom surface, as shown in FIG. 3, if the bottom surface of the septic tank is made into an inclined surface 23a and lowered toward the bath water introducing part 24, the supporting material that has settled will naturally enter the bath water. Part 2
4, the supporting material can be efficiently circulated without providing the bath water introducing portion 28 as described above.

FIG. 4 is a view for explaining another example of the embodiment of the bath water circulation septic tank according to the present invention.
In the present embodiment, 29 is a conical portion, and in the present embodiment, the lower portion of the bottom surface of the cylindrical shape is a conical shape 29, and an inflow portion 24 that opens in the axial direction is provided in the central portion below the conical portion 29. The flow path is expanded along the inner wall surface of the portion 29 into a radial path. Therefore, the bath water flowing out upward from the inflow portion 24 spreads along the axis and moves upward, is blocked by the intermediate wall 25, and descends in the direction of arrow R _P along the inner wall of the cylindrical surface or the conical surface. As a result, a circulating flow is formed, and even in the case of the carrier material 22 having a larger specific gravity than the bath water, the supporting material 22 can be efficiently flowed according to the circulating flow.

By selecting the flow velocity of the bath water from the inflow portion 24 according to the specific gravity of the carrier material 22, the flow velocity of the circulating flow is also determined, and accordingly, the carrier material 22 can be made to flow throughout the circulation purification tank. Therefore, high stirring / mixing efficiency can be obtained. It is also effective to circulate the bath water and the supporting material around the axis of the cylindrical septic tank casing 21.

FIG. 5 is a schematic configuration diagram for explaining another embodiment of the present invention. In this embodiment, the bath water introducing portion 24 is provided on the lower side wall of the bath water circulation purifying tank, and the outflow direction thereof is The bath water is arranged along the side wall so that the bath water flows upward in the septic tank while rotating as shown by the arrow R _{S. In} this way, the bath water does not flow easily. None (no running water component flowing in the opposite direction),
The bath water can be efficiently circulated.

FIG. 6 is a view for explaining still another example of the embodiment of the bath water circulation septic tank according to the present invention, in which the septic tank casing 21 is a cylindrical body, and the carrier material 22 is uniform and stable in the septic tank. In order to be stirred and mixed with each other, the inner shape of the casing 21 is preferably, for example, a cylindrical shape, but is not limited to this. For example, a polygonal shape or an entire septic tank having a spherical shape may be used. Is also good.
The casing 21 shown in FIG. 6 has a cylindrical inner shape and is horizontally arranged so that the circulating bath water inflow portion 24 is provided at one end surface side of the cylindrical body and the other is formed. A mesh 26 is provided on the upper end surface. The circulating bath water flows in the tangential direction of the cylindrical portion by passing through the bath water inflow portion 23. Along with this, the supporting material 22 for the microorganisms in the septic tank is agitated and mixed on the inflowing bath water flow.
In addition, in order to increase the linear velocity of the inflowing bath water, a part of the inner diameter of the bath water introducing portion 23 may be smaller than the inner diameters before and after the portion.

The bath water that has flowed into the septic tank casing 21 is discharged from the bath water mesh 26 provided on the side portion of the septic tank cylinder, while the bath water and the carrier material 22 are swirled in the circumference R _s direction inside the septic tank. While moving. Compared with the septic tank shape shown in FIG. 3, in the septic tank shown in FIG. 6, the circulation radius of the bath water in the septic tank casing 21 is relatively small, and a stable circulation flow is formed in the circumferential direction. Stirring / mixing efficiency is improved even for low specific gravity supported materials that easily float in water.

The supporting material 22 is a foam or a fiber molded product whose specific gravity when wet is similar to that of water. If the supporting material 22 is slightly heavier than water, uniform mixing becomes easy even at a low flow rate.
If it is lighter than water, it is possible to maintain uniform mixing by increasing the filling amount and increasing the mixing density.

In any of the above-described bath water circulation septic tanks according to the present invention, the pollutant components in the bath water come into contact with the microorganisms adhering to the carrier material 22 every time they flow into the septic tank, and the microorganisms have them. Decomposed by the action of degrading organic substances. On the other hand, the insoluble pollutants that are not subject to microbial decomposition are not accumulated in the septic tank because they are exhausted from the septic tank through the discharge part 27 in the process of stirring and mixing the supporting material. Further, it is not necessary for all the bath water circulating in the system of the circulation purification device to flow into the septic tank, and the inflowing bath water flow rate is the flow rate at which the supporting material in the septic tank is most uniformly and stably stirred and mixed. It is preferable to set to. The appropriate flow rate depends on the volume and shape of the septic tank, the specific gravity of the carrier material used,
Depends on shape, size, etc. Therefore, as shown in FIG. 1, it is desirable to provide a bypass (third water pipe 14) in a part of the circulation system to adjust the flow rate of inflowing bath water into the septic tank.

In order to reduce the size and weight of the purifying device while maintaining the predetermined purifying performance, it is effective to increase the amount of the carrier material 22 existing in the septic tank. But,
If an excessive amount of the supporting material is present in the septic tank, it becomes difficult to uniformly and stably stir and mix the supporting material in the septic tank. Therefore, it is necessary to determine an appropriate filling amount of the supporting material. By the way, the upper limit of the carrier material 22 in the septic tank shown in FIG. 2 was about 80%, and that of the septic tank shown in FIG. 6 was about 60%. However, these upper limits depend on the inflowing bath water flow rate and flow velocity, the septic tank internal volume and shape, and the specific gravity, shape, and size of the supporting material, so determine the appropriate amount of supporting material used for each combination. This is very important. Further, in the above description, a single septic tank is described, but the septic tank is not required to be a single body, and a plurality of septic tanks may be installed in series or in parallel.

Example 1 The vertical cylindrical septic tank shown in FIG. 2 was used as the biological septic tank of the bath water circulation purifying system to test the purifying performance of the bath water. The effective internal volume of the septic tank is about 1 liter. As the microorganism supporting material, 30 g of ion exchange treated cellulose particles (manufactured by Biomaterials Co., Ltd., particle diameter: about 5 mm) was used.
The total amount of bath water was 200 liters, and the inflowing bath water flow rate into the biological septic tank was 5 liters per minute. Turbidity and absorbance at 280 nm were used as indicators of the water quality of bath water.
As a result of adding 2 g of peptone as a pseudo-pollutant to the bath water every day and observing the daily difference and diurnal variation in water quality (FIGS. 7 and 8), all showed good purification performance. Moreover, accumulation of pollutants inside the septic tank was not observed. The degree of odor generation was also very small.

Example 2 As a biological septic tank of a bath water circulation purifying system, a horizontal cylindrical septic tank shown in FIG. 6 was used to test the purifying performance of the bath water. The effective internal volume of the septic tank is about 0.8 liter. As the microorganism supporting material, 25 g of ion-exchange treated cellulose particles (particle diameter: about 5 mm) were used. The total amount of bath water was 200 liters, and the inflowing bath water flow rate into the biological septic tank was 5 liters per minute. Since air bubbles were mixed in the circulating bath water, the apparent specific gravity of the microorganism supporting material when wet was smaller than that of water. The turbidity and the absorbance at 280 nm were also used as indicators of the water quality of the bath water. As a result of adding 2 g of peptone as a pseudo-pollutant to the bath water every day and observing the daily difference and diurnal variation in water quality (FIGS. 9 and 10), all showed good purification performance. Moreover, accumulation of pollutants inside the septic tank was not observed. The degree of odor generation was also very small.

Comparative Example A conventional septic tank having the shape shown in FIG. 13 was used as the biological septic tank of the bath water circulation purification system, and the purifying performance of the bath water was tested. The effective internal volume of the septic tank is about 3 liters. As the microorganism supporting material, 1.7 kg of Asahilite and 0.6 kg of bakuhanseki (both having a particle diameter of about 7 mm) were used. 200 total bath water
The flow rate of the inflowing bath water into the biological septic tank was 20 liters per minute. Turbidity and absorbance at 280 nm were used as indicators of the water quality of bath water. As a result of observing daily difference and diurnal variation of water quality by adding 2 g of peptone as a pseudo-pollutant to the bath water every day (Figs. 11 and 12), the water quality was good, but the pollutant inside the septic tank Accumulation was observed, and the result was that the degree of odor was high as compared with Examples 1 and 2.

From the above results, by constantly stirring and mixing the microorganism-supporting material in the septic tank with bath water, it is possible to achieve the same purification performance with a smaller amount of the supporting material as compared with the comparative example. Therefore, it became possible to reduce the accumulation of pollutants and the generation of odor inside the septic tank.

[0053]

According to the invention of claim 1, a bath water suction portion for sucking the bath water in the bathtub, a pump for supplying the bath water to the bath water circulation purifying tank through the bath water suction portion, and the bath water circulation. The bath water circulating / purifying tank that circulates the particulate purified microorganism supporting material together with the bath water supplied to the septic tank in the bath water circulating / purifying tank, and the water pipe that discharges the bath water flowing out from the bath water circulating / purifying tank to the bath In this way, a stable mixed state can be obtained even when the supporting material is densely packed in the septic tank,
Since the degree of mixing of the carrier material while rotating increases,
The contact efficiency between the microbial layer on the surface of the supporting material and the pollutant component is improved, and a high cleaning effect of bath water is obtained.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided a water supply pipe for returning a part or all of the bath water fed to the bath water circulation purification tank via the bath water suction section to the bath. By having this, the flow rate of the bath water can be adjusted by bypassing the bath water in this water supply pipe.

According to a third aspect of the present invention, in the first or second aspect of the invention, an outside air introducing means for introducing outside air is provided in the water supply pipe passing through the pump, and the dissolved oxygen in the circulation system is increased and the carrier is carried. The material mixing efficiency can be increased.

According to a fourth aspect of the present invention, there is provided a septic tank casing having an inflow portion and a discharge portion of bath water, and a supporting material for immobilizing microorganisms that decompose organic substances contained in the septic tank casing. Is a granular body having substantially the same specific gravity as the bath water in the bath water, and the granular body is circulated in the septic tank casing together with the bath water supplied from the bath water inflow section and discharged from the discharge section. With this method, a stable mixed state can be obtained even when the carrier material is packed in the septic tank at a high density, and the degree to which the carrier material is mixed while rotating is increased. The contact efficiency with the components is improved, and a high cleaning effect of bath water is obtained.

According to a fifth aspect of the invention, in the invention of the fourth aspect, the bath water is vertically circulated together with the supporting material in the septic tank casing. The contact efficiency is improved, and a high effect of washing the bath water can be obtained.

According to a sixth aspect of the present invention, in the invention of the fourth aspect, the bath water is made to flow in a spiral shape together with the supporting material in the septic tank casing. The contact efficiency is improved, and a high effect of washing the bath water can be obtained.

According to a seventh aspect of the invention, in the invention of the fourth to sixth aspects, an intermediate wall having a mesh for preventing passage of the carrier material is provided on the upper part of the septic tank casing, and the carrier material flows out. Instead, it can be efficiently circulated in the septic tank casing.

According to the invention of claim 8, in the invention of claim 7, the intermediate wall has a convex shape on the upper side, and the mesh is provided on the uppermost part of the intermediate wall to prevent air from accumulating in the septic tank casing. The contact efficiency between the microbial layer on the surface of the supporting material and the pollutant components is further improved, and a higher cleaning effect can be obtained.

According to a ninth aspect of the present invention, in the invention of the fourth to eighth aspects, the septic tank casing is made of a flexible material that expands into a desired shape when bath water is introduced into the casing. When not in use, the septic tank can be stored in a flat bag shape, saving storage space. Furthermore,
The carrier material can be stored in a refrigerator or the like in a state where microorganisms are attached to the carrier material, and the start-up during use can be accelerated.

According to a tenth aspect of the present invention, there is provided a tubular body having a vertical axial direction, the tubular body being disposed at a position separated from the center of the bottom, and the bath water flowing in in a direction parallel to the axis, and the top of the tube. A septic tank casing having a discharge part for discharging the bath water, and a granular body housed in the septic tank casing and having substantially the same specific gravity as the bath water. The bath water and the supporting material that have flowed in are circulated in the vertical direction so that the bath water flows out, and the contact efficiency between the microbial layer on the surface of the supporting material and the pollutant components is improved, A high cleaning effect can be obtained.

According to a tenth aspect of the present invention, in the invention of the tenth aspect, the lower side wall of the septic tank casing has a bath water introducing section for flowing the supporting material toward the bath water introducing section. The contact efficiency between the microbial layer on the surface of the supporting material and the pollutant component is improved, and a high effect of washing the bath water can be obtained.

According to a twelfth aspect of the present invention, a cylindrical body having a vertical axial direction is provided at an inflow portion and a top portion of the cylinder, the lower side wall being arranged so that the bath water flows along the side wall. The inflow is composed of a septic tank casing having a discharge part for discharging the bath water, and a carrier material housed in the septic tank casing and for immobilizing microorganisms having substantially the same specific gravity as the bath water in the bath water. The bath water and the supporting material that have flowed into the septic tank casing from the part are made to flow out from the outflow part while swirling, and the contact efficiency between the microbial layer on the surface of the supporting material and the pollutant component is improved, A high cleaning effect can be obtained.

In the thirteenth aspect of the present invention, a cylindrical body having an axial vertical direction is disposed at the center of the bottom portion, and is disposed at the inflow portion for inflowing the bath water in the direction parallel to the axis and the cylindrical top portion. A septic tank casing having a discharge part for discharging the bath water, and a granular body housed in the septic tank casing and having substantially the same specific gravity as the bath water and flowing into the septic tank casing. The bath water and the supporting material are circulated in the vertical direction so that the bath water flows out, the contact efficiency between the microbial layer on the surface of the supporting material and the pollutant components is improved, and a high cleaning effect of the bath water is obtained. You will get it.

The invention of claim 14 is the invention of claim 10 or 13.
In the invention, the bottom of the tubular body is a concave surface such that the bath water introduction part is the lowest, and the retention carrier is eliminated, and the microbial layer on the surface of the carrier material and the pollutant component are contacted more effectively. And a high cleaning effect of bath water can be obtained.

According to a fifteenth aspect of the present invention, there is provided a tubular body having a horizontal axial direction, an inflow portion into which the bath water flows along a tubular wall near one end surface, and an upper surface of the tubular wall near the other end surface. A septic tank casing comprising a discharge part for discharging the bath water, and a carrier material that is housed in the septic tank casing and immobilizes microorganisms with a granular material having a specific gravity similar to that of the bath water,
The bath water and the supporting material are made to flow while swirling around the axis in the septic tank casing,
The contact efficiency between the microbial layer on the surface of the supporting material and the pollutant component is improved, and a high effect of washing the bath water can be obtained.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining an embodiment of a bath water circulation purification device according to the present invention.

FIG. 2 is a diagram for explaining an embodiment of a bath water circulation septic tank according to the present invention.

FIG. 3 is a diagram for explaining an embodiment of a bath water circulation septic tank according to the present invention.

FIG. 4 is a diagram for explaining another example of the embodiment of the bath water circulation septic tank according to the present invention.

FIG. 5 is a diagram for explaining still another example of the embodiment of the bath water circulation septic tank according to the present invention.

FIG. 6 is a diagram for explaining still another example of the embodiment of the bath water circulation septic tank according to the present invention.

FIG. 7 is a diagram showing a result of observing daily variation in water quality by adding 2 g of peptone as a pseudo-pollutant to bath water every day as a pseudo-pollutant in the bath water circulation septic tank according to the present invention.

FIG. 8 is a diagram showing a result of observing a diurnal variation of water quality in a bath water circulation septic tank according to the present invention, in which 2 g of peptone as a pseudo-pollutant was added to bath water every day.

FIG. 9 is a diagram showing a result of observing daily variation in water quality by adding 2 g of peptone as a pseudo-pollutant to bath water every day as a pseudo-pollutant in the bath water circulation septic tank according to the present invention.

FIG. 10 is a diagram showing the results of observing diurnal variations in water quality in a bath water circulation septic tank according to the present invention, in which 2 g of peptone as a pseudo-pollutant was added to bath water every day.

FIG. 11 is a diagram showing a result of observing daily variation in water quality by adding 2 g of peptone as a pseudo-pollutant to the bath water every day in a conventional bath water circulation septic tank.

FIG. 12 is a diagram showing a result of observing daily fluctuations of water quality in a conventional bath water circulation septic tank, in which 2 g of peptone as a pseudo pollutant was added to bath water every day.

FIG. 13 is a diagram for explaining a septic tank to which a conventional mechanical stirring mechanism is added.

[Explanation of symbols]

1 ... tub, 2 ... first water pipe, 3 ... bath water, 4 ... bath water suction port, 5 ... pump, 6 ... bathwater circulation type biological septic tank, 7 ... filter, 8 ... air inlet, 9 ... purification Microbial support material,
10 ... Second water pipe, 11 ... Blowout port, 12 ... Heater, 13 ... Three-way switching valve, 14 ... Third water pipe, 21,3
1 ... Septic tank casing, 22 ... Microorganism support material, 23
... bottom part, 24 ... inflow part, 25 ... intermediate wall, 26 ... mesh, 27 ... discharge part, 28 ... bath water introducing part, 29 ... conical part,
31a ... Bath water inflow section, 31b ... Bath water discharge port, 32 ... Bearing material, 33 ... Stirring section, 34 ... Motor.

Claims (15)

[Claims] 1. A bath water inhaler for inhaling bath water in a bath,
A pump for supplying the bath water to the bath water circulation purification tank via the bath water suction part, and the bath for circulating the particulate purification microorganism supporting material together with the bath water supplied to the bath water circulation purification tank in the bath water circulation purification tank A bath water circulation purification apparatus comprising a water circulation purification tank and a water pipe for discharging the bath water flowing out from the bath water circulation purification tank to the bath. 2. The water supply pipe according to claim 1, further comprising a water supply pipe for returning a part or all of the bath water supplied to the bath water circulation purifying tank through the bath water suction unit to the bath. Bath water circulation purification device. 3. The bath water circulation purifying apparatus according to claim 1, further comprising an outside air introducing means for introducing outside air into a water supply pipe passing through the pump. 4. A septic tank casing having an inflow portion and a discharge portion of bath water, and a carrier material for immobilizing microorganisms decomposing organic substances contained in the septic tank casing,
The supporting material is a granular material having substantially the same specific gravity as the bath water in the bath water, and the granular material is circulated in the septic tank casing together with the bath water supplied from the bath water inflow portion and is discharged. A bath water circulation septic tank characterized by being discharged from the section. 5. The bath water circulating septic tank according to claim 4, wherein the bath water is vertically circulated in the septic tank casing together with the supporting material. 6. The bath water circulating septic tank according to claim 4, wherein the bath water spirally flows together with the supporting material in the septic tank casing. 7. The bath water circulating septic tank according to claim 4, wherein an intermediate wall having a mesh for preventing passage of the supporting material is provided on an upper part of the septic tank casing. 8. The bath water circulating septic tank according to claim 7, wherein the intermediate wall has a convex shape on the upper side, and the mesh is provided on the uppermost part thereof. 9. The septic tank casing is made of a flexible material that expands into a desired shape when bath water is introduced into the casing. Bath water circulation septic tank. 10. A cylindrical body whose axial direction is vertical, which is arranged at a position spaced from the center of the bottom part, and which is arranged at an inflow part and a cylinder top part for inflowing the bath water in a direction parallel to the axis, The septic tank casing having a discharge part for discharging the bath water, and a granular body housed in the septic tank casing and having substantially the same specific gravity as the bath water, and flowing into the septic tank casing. A bath water circulation purification tank, characterized in that the bath water and the supporting material flow out while the bath water circulates in the vertical direction. 11. The lower side wall of the septic tank casing,
The bath water circulation septic tank according to claim 10, further comprising a bath water introducing portion for flowing the supporting material toward the bath water introducing portion. 12. A cylindrical body having a vertical axial direction, the lower side wall being provided with an inflow section arranged so that the bath water flows along the side wall, and the cylindrical top section being provided with the bath water. A septic tank casing having a discharge part for discharging, and a carrier material housed in the septic tank casing and for immobilizing microorganisms having substantially the same specific gravity as the bath water in the bath water. The bath water circulation purifying tank, wherein the bath water and the supporting material that have flowed into the bath flow out from the outflow portion while swirling. 13. A cylindrical body whose axial direction is vertical, which is arranged at the center of the bottom part and is arranged at the inflow part and the cylinder top part for inflowing the bath water in the direction parallel to the axis. The septic tank casing having a discharge part for discharging, and a granular body housed in the septic tank casing and having substantially the same specific gravity as the bath water in the bath water, and the bath water flowing into the septic tank casing and the A bath water circulation septic tank, wherein the supporting material flows out while the bath material circulates in the vertical direction. 14. The bottom surface of the tubular body is a concave surface such that the bath water introducing portion is the lowest.
Alternatively, the bath water circulation septic tank according to 13 above. 15. A tubular body having a horizontal axial direction, wherein the bath water is introduced from an inflow portion into the tubular wall near one end surface along which the bath water flows, and an upper surface of the tubular wall near the other end surface. It comprises a septic tank casing consisting of a discharge part for discharging, and a supporting material which is housed in the septic tank casing and which immobilizes microorganisms with a granular material having a specific gravity similar to that of the bath water, the bath water and the supporting material being the septic tank. A bath water circulating septic tank, which flows while swirling around the axis in a casing.