JPH1085775A - Method and system for cleaning bath water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize the cleaning of bath water by supplying a chelating agent which is released slowly into a passage in which dirt such as sweat is decomposed by using microorganisms to purify the water. SOLUTION: Bath water in a bathtub 3 is sucked from a water sucking part 4 by a pump 6 and circulated through a circulating channel 2, and organic substances such as sweat are decomposed by microorganisms in a cleaning part 8 to purify the water. Moreover, it is sterilized in a sterilization tank 9 and heated by a heater 10. A chemical supply part 11 is installed in the channel 2 to supply a chelating agent to the water. The agent can be supplied directly into the bathtub 3. The agent which is made to be released slowly is supplied. EDTA, etc., are used as the chelating agent, and a substance is used which blockades metal ions, etc., such as silver ion having strong antibacterial and sterilizing properties in the bath water as a complex to eliminate the effects. In this way, water quality for which microorganisms held in a microorganism holding part which purifies the bath water can decompose organic substances such as sweat can be adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a system for purifying bath water for continuously purifying pollutants in domestic bath water or public bath water by metabolism of microorganisms.

[0002]

2. Description of the Related Art Conventionally, in purifying bath water,
2. Description of the Related Art A system is used in which microorganisms are inhabited and retained in a microorganism retaining portion such as porous ceramics, fiber filter media, and activated carbon, and organic substances and the like, which are polluting substances such as dirt and sweat, are decomposed and purified by the microorganisms. However, conventionally, since the bath water is directly supplied from a water heater or tap water, the quality of the bath water differs greatly depending on the region and the household.

[0003]

In the prior art as described above, the quality of bath water is different in each household. In particular, substances that inhibit the growth of microorganisms that purify the bath water are contained in the bath water. If it is contained in high concentration, microorganisms suitable for bath water purification will not be retained in the microorganism holding part, and floating microorganisms unsuitable for bath water purification will grow and make the bath water cloudy. The bath water does not become clear. Examples of substances in the bath water that inhibit purification of the bath water include free chlorine, heavy metals, and heavy metal ions.

The present invention has been made in view of the above problems, and removes, blocks or inactivates the above-mentioned purification inhibiting substances in bath water to prepare a water quality environment suitable for purification of bath water. It is another object of the present invention to provide a bath water purification method and a bath water purification system capable of stabilizing the purification of bath water.

[0005]

Means for Solving the Problems In order to solve the above-mentioned problems, the method for purifying bath water according to the present invention is intended for purifying bath water by decomposing dirt components such as sweat and grime using microorganisms. The method is characterized in that the chelating agent is desorbed and supplied in the middle of the path. By employing such a method, the chelating agent can be supplied continuously for a long period of time, and the influence of heavy metals or heavy metal ions that inhibit the growth of microorganisms that purify bath water can be eliminated. become.

It is also preferable to add a chlorine removing agent. By adopting such a method, it is possible to remove free chlorine that inhibits the growth of microorganisms that perform bathwater purification. Further, the supply amount of the chelating agent is preferably 10 mg or more and 10 g or less for 200 liters of bath water per day. By employing such a method, the chelating agent can be supplied without excess and deficiency.

[0007] Further, the chlorine removing agent is supplied after being desorbed,
It is also preferable that the supply amount of the chlorine removing agent is 10 mg or more and 10 g or less for 200 liters of bath water per day. By adopting such a method, the chlorine removing agent can be supplied without excess and deficiency. In addition, a chelating agent is contained in a cured product mainly containing one or more of sodium alginate, κ-carrageenan, PVA, agar, cellulose acetate and the like to form a release agent for releasing the chelating agent. Preferably, the release agent is soaked in bath water to release the chelating agent in the bath water. By employing such a method, the chelating agent can be easily released and supplied.

It is also preferable that the chelating agent is supplied in a larger amount than the controlled release supply amount at the beginning of operation or at the time of bath water exchange. By adopting such a method, it is possible to cope with a case where the purification inhibitor is contained more than usual, such as at the beginning of operation or at the time of bath water exchange. In addition, the supply amount of the chelating agent supplied at the initial stage of operation or at the time of bath water replacement is more than 20 mg / 200 liters of bath water.
It is also preferable that the weight is 0 g or less. By employing such a method, the chelating agent can be supplied without excess or deficiency when the purification inhibitor is contained more than usual, such as at the beginning of operation or at the time of bath water exchange. .

Further, at the beginning of the operation or at the time of bath water exchange, the chelating agent and the chlorine removing agent are supplied in a larger amount than the desorbed supply amount, and the supply amount of the chlorine removing agent at the beginning of the operation or at the time of bath water exchange is 200 liters. It is also preferable that the amount is 20 mg or more and 10 g or less with respect to the bath water. By adopting such a method, when more free chlorine is contained than usual at the beginning of operation or at the time of bath water exchange, it is possible to cope with the supply of the chlorine remover without excess or shortage. Things.

Further, the bath water purification system of the present invention comprises a bath tub, a purifying section for circulating the bath water in the bath tub and decomposing dirt components such as sweat and grime using microorganisms, and a bath tub. And a drug supply section for supplying the chelating agent after releasing it. By adopting such a configuration, a simple configuration is employed in which a chelating agent is continuously supplied over a long period of time to eliminate the influence of heavy metals or heavy metal ions that inhibit the growth of microorganisms that purify bath water. Can be.

It is also preferable to provide a chemical supply unit for supplying a chelating agent and a chlorine removing agent. With such a configuration, a system for removing free chlorine that inhibits the growth of microorganisms for purifying bath water can be provided with a simple configuration. Further, it is preferable that the supply amount of the chelating agent supplied from the medicine supply unit is 10 mg or more and 10 g or less per 200 liters of bath water per day.
With such a configuration, it is possible to provide a system that supplies a chelating agent with a simple configuration without excess or shortage.

In addition, a chemical supply unit is provided for supplying the chlorine-removing agent by releasing the chlorine-removing agent, and the supply amount of the chlorine-removing agent supplied from the chemical supplying unit after being released is increased to 200 liters of bath water per day. On the other hand, the amount is preferably 10 mg or more and 10 g or less. With such a configuration, it is possible to provide a system for supplying the chlorine removing agent with a simple configuration without excess or shortage.

The release agent for releasing the chelating agent from the drug supply unit and supplying the chelating agent is mainly one or more of sodium alginate, κ-carrageenan, PVA, agar, cellulose acetate and the like. It is preferable that the cured product contains a chelating agent. With such a configuration, it is possible to provide a system that can easily release and supply a chelating agent.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on embodiments. FIG. 1 shows an example of a bath water purification system. In the figure, reference numeral 1 denotes a bath water purification device, which is provided at one end of a circulation channel 2 with a water absorbing portion 4 for sucking hot water from a bathtub 3.
A spout 5 for spouting water into the bathtub 3 at the other end of the circulation channel 2
And a purification unit 8 having a microorganism holding unit made of a filter 6 such as a porous fiber filter, porous ceramics, activated carbon, or the like in the middle of the circulation flow path 2, and sterilizing microorganisms floating in the bath water. For sterilization, a heater 10 and the like are provided. Then, by operating the pump 6, the bath water in the bathtub 3 is sucked from the water absorbing section 4, and microorganisms in the filter medium 7 in the purifying section 8 decompose and purify organic matter such as dirt and sweat to purify the sterilizing tank 9. Then, the water is sterilized by the heater 10, heated by the heater 10, and discharged from the water discharging section 5 to the bathtub 3 again.

Here, in the present invention, the medicine supply unit 11
Is provided, and the chelating agent is supplied from the drug supply unit 11 to the bath water purified by the microorganisms as described above. That is, in purifying bath water by decomposing dirt components such as sweat and dirt using microorganisms, a chelating agent is supplied directly in the circulation path or directly into the bathtub 3.
At this time, in the present invention, the chelating agent is released after being released. The chelating agent used in the system of the present invention can be EDTA, EDTA-2Na, or the like, which can be obtained at a low cost. Complexes of heavy metal ions such as silver ions and copper ions contained in the bath water with strong antibacterial and bactericidal properties can be used. And the effect is lost. As a result, it is possible to adjust the water quality at which the microorganisms held in the microorganism holding unit for purifying the bath water can decompose organic substances such as dirt and sweat.

In order to release the chelating agent and supply it to the bath water, sodium alginate, κ-carrageenan, PV
A, agar, cellulose acetate, etc., to form a release agent which is a cured product in which a chelating agent is contained in a cured product mainly containing one or more kinds of cellulose acetate to release the chelating agent. The agent is immersed in bath water to release the chelating agent into the bath water.

For example, when sodium alginate is used, a chelating agent and sodium alginate are dissolved in boiling water, and this is dropped into a CaCl ₂ solution to be cured. The chelating agent is gradually eluted and released into the bath water by bringing the agent into the drug supply unit 11 and bringing the agent into contact with the bath water. When κ-carrageenan is used, κ-carrageenan is dissolved in 100 ml of physiological saline to prepare a solution.
%, And 10 g of EDPA as a chelating agent (10 g of ascorbic acid as a
Is further added)), and the mixture is dropped or dipped in a KCl solution to be cured, and the release agent, which is a cured product thus obtained, is put into the drug supply unit 11 and brought into contact with bath water, The chelating agent is gradually eluted and released into the bath water.

When PVA is used, 10 to 2
After mixing 100 g of a 0% PVA solution with 10 g of EDTA as a chelating agent (and further adding 10 g of ascorbic acid as a chlorine removing agent described later as necessary),
By cooling and curing, the release agent, which is a cured product obtained in this way, is put into the drug supply unit 11 and brought into contact with the bath water, whereby the chelating agent is gradually eluted and released into the bath water. You do it.

When agar is used, 1 to 10%
Of a chelating agent E in 100 ml of the PVA solution
After mixing 10 g of DTA (additionally 10 g of ascorbic acid which is a chlorine removing agent to be described later if necessary), the mixture is dropped into an aqueous solution of boric acid to be cured, and thus the release agent is put into the drug supply unit 11. By contacting in the bath water,
The chelating agent is gradually eluted and released into the bath water.

In the embodiment shown in FIG. 1, the medicine supply section 11 is attached to a portion of the piping constituting the circulation flow path 2 located in the bathtub 3 and the inside of the medicine supply section 11 is obtained as described above. A release agent, which is a cured product containing a chelating agent, is put in, and the medicine supply unit 11 is set so that it is immersed in hot water in the bathtub 3. A water hole (not shown) provided in the medicine supply unit 11 The hot and cold water in the bathtub 3 comes into contact with the release agent containing the chelating agent in the drug supply unit 11 through the, so that the chelating agent is continuously eluted into the bath water for a long period of time.

By releasing the chelating agent as described above, the chelating agent can be continuously supplied to the bath water for a long period of time, and the bath water which has been reduced due to hot water or evaporation is removed from the bath water. By supplementing with tap water or hot water containing purification inhibitors, despite the fact that bath water purification substances are mixed every day,
Over a long period of time, the antibacterial and bactericidal heavy metal ions such as silver ions and copper ions contained in the bath water are blocked as a complex, the effectiveness of which is lost, and the microorganisms retained in the microorganism holding unit that purifies the bath water are removed. It can prepare a water environment that can decompose organic substances such as dirt and sweat.

In the above embodiment, the medicine supply unit 11
An example is shown in which the chelating agent is released and supplied to the bath water in the bathtub 3. However, a medicine supply section 11 is provided in the circulation flow path 2, and the circulation flow is supplied from the medicine supply section 11. The chelating agent may be released and supplied to the bath water flowing in the passage 2. In the above embodiment,
The chelating agent was released and supplied to the bath water,
In addition to the supply of the chelating agent, a chlorine remover may be supplied to the bath water. In this case, in supplying the chlorine removing agent, it is preferable that the chlorine removing agent is supplied after being desorbed similarly to the supply of the chelating agent.

As the chlorine remover to be used, a reducing agent such as ascorbic acid or sodium thiosulfate can be used, and free chlorine having strong antibacterial and bactericidal properties contained in the bath water is reduced to chloride ions. The effect has been lost. As a result, in combination with the effect of sequestering and inactivating heavy metals or heavy metal ions by the chelating agent, the antimicrobial and sterilizing properties of the free chlorine were eliminated, and the microorganisms were held in the microorganism holding unit that purifies the bath water. It is possible to adjust the water quality so that microorganisms can decompose organic substances such as dirt and sweat.

In order to release the chlorine removing agent, for example, a chelating agent, a chlorine removing agent and sodium alginate are dissolved in boiling water, and this is added dropwise to a CaCl ₂ solution to be cured. Drug release unit 11
And then brought into contact with the bath water, the chelating agent and the chlorine removing agent are gradually eluted and released into the bath water. In this way, the release agent is not limited to only those containing a chelating agent and a chlorine removing agent, but a releasing agent containing only a chelating agent and a releasing agent containing only a chlorine removing agent are separately formed. Alternatively, the separate release agents may be put into the drug supply unit 11 respectively.

Further, in the present invention, the supply amount of the chelating agent to be supplied after being released is 10 mg or more and 10 g or less per 200 liters of bath water per day. That is, the supply amount of the chelating agent is 200 per day.
When the amount is 10 mg or less per liter of bath water, the effect of heavy metals or heavy metal ions in the bath water that inhibits purification of the bath water cannot be sufficiently reduced, and microorganisms cannot be held in the microorganism holding unit. is there. The supply amount of the chelating agent is 10 liters per day for 200 liters of bath water.
g or more, the inorganic salts necessary for the growth of the microorganisms are blocked, and the microorganisms cannot be retained in the microorganism holding portion, and the excess chelating agent becomes a load to pollute the bath water, which is favorable. It may not be possible to purify the bath water.

Further, in the present invention, the supply amount of the chlorine removing agent to be supplied after being desorbed is from 10 mg to 10 g per 200 liter of bath water per day. That is, the supply amount of the chlorine remover is 200 per day.
If the amount is 10 mg or less per liter of bath water, free chlorine in bath water that inhibits purification of bath water cannot be sufficiently removed, and microorganisms cannot be held in the microorganism holding unit. When the supply amount of the chlorine remover is 10 g or more per 200 liters of bath water per day, the excess chlorine remover becomes a load and pollutes the bath water, so that good bath water purification cannot be performed. There is fear.

At the beginning of operation or at the time of bath water exchange,
During normal operation, the amount of water supplied to the bathtub 3 from the water heater or water supply to the bathtub 3 when the amount of water is insufficient due to evaporation or hot water is supplied to the bathtub 3 from the water heater or water supply. At the time of replacement, the content of the bath water purification inhibitor increases. Therefore, in the system of the present invention,
At the beginning of operation or at the time of bath water exchange, the chelating agent is supplied in a larger amount than the desorbed supply amount, whereby the purification inhibitor is contained more than at the time of normal operation at the beginning of operation or at the time of bath water exchange. To be dealt with. Here, the supply amount of the chelating agent to be supplied at the beginning of the operation or at the time of bath water exchange is supplied more than the supply amount at the time of desorbing and supplying as described above, and the supply amount is 200 liters of bath water. 20 mg or more and 10 g or less.

Further, the chlorine removing agent may be supplied at a larger amount than the controlled release supply amount at the beginning of operation or at the time of bath water exchange. Here, the supply amount of the chlorine remover to be supplied at the beginning of the operation or at the time of bath water exchange is supplied more than the supply amount at the time of desorbing and supplying as described above, and the supply amount is 200 liters of bath water. On the other hand, it should be 20 mg or more and 10 g or less.

Further, both of the chelating agent and the chlorine removing agent may be supplied in excess of the controlled release supply amount at the beginning of operation or at the time of bath water exchange. In this case, the supply amount in each case is larger than the supply amount when the chelating agent and the chlorine removing agent are desorbed and supplied, and the supply amount is 20 mg or more for 200 liters of bath water. 10 g or less.

In any of the embodiments, at least one or both of the chelating agent and the chlorine removing agent are supplied in a larger amount than the controlled release supply amount at the beginning of the operation or at the time of bath water exchange, and the microorganisms are sufficiently supplied to the microorganism holding part. When the bath water purification is stable and the bath water purification is stable, the bath water exchange is unnecessary (that is, in the normal operation state where the microorganisms are sufficiently retained in the microorganism holding part and the bath water purification is stable), the chelating agent or the chelating agent and chlorine removal are removed. The agent is desorbed and supplied (i.e., supplied in a controlled release amount), and a chelating agent or a chelating agent and a chlorine removing agent corresponding to a bath water purification inhibitor contained in the bath water can be continuously supplied. Things.

[0031]

Next, an embodiment of the present invention will be described below. (Example 1) The following experiment was conducted using the bath water purification apparatus shown in FIG. The bath water purifier has an outer dimension of 333 width.
a pump 6 having a size of 390 mm × height 390 mm × depth 220 mm and circulating bath water therein, and a purifying section 8 having a filter medium 7 made of a porous fiber filter medium, for sterilizing microorganisms floating in the bath water. A sterilizing tank 9, a heater 10 and the like are provided. Then, the pump 6 is operated to suck the bath water in the bathtub 3 from the water absorption unit 4, and the microorganisms in the filter medium 7 in the purification unit 8 decompose and purify organic matter such as dirt and sweat, and sterilize in the sterilization tank 9. Then, the water is heated by the heater 10 and discharged from the water discharging unit 5 into the bathtub 3 again, whereby pollutants in the bath water are decomposed and purified by microorganisms living in the purifying unit 8. Here, a pump having a discharge rate of 25 l / min is used as the pump 6, a filter medium 7 is a porous fiber filter formed by forming a polyester fiber into a rectangular parallelepiped having a diameter of 10 mm and a height of 5 mm, and the volume of the purification unit 8 is 2 l. It is. The amount of bath water is set to 200 liters, the set temperature is set to 42 ° C., and a chemical supply unit 11 is attached to a part of the piping constituting the circulation flow path 2 located in the bath tub 3 and immersed in the bath water in the bath tub 3. Then, beads obtained by curing EDTA as a sustained-release agent with sodium alginate (10 g of EDTA and 2 g of sodium alginate were dissolved in 100 ml of boiling water,
It was formed by dropping into a 0.5% CaCl ₂ solution. Here, when the beads were immersed in bath water at 42 ° C., the amount of EDTA eluted was adjusted to 0.1 to 1 g / day), and EDTA was released and supplied to the bath water. An experiment was performed. Water supplied into the bathtub 3 is Cu (NO ₃ ) ₂ as heavy metal ions.
Is added to adjust the copper ion concentration to 500 ppb, and sodium hypochlorite to adjust the free chlorine concentration to 1.5 ppm. A solution in which 32 g / l of NaCl, 4.0 g / l of urea, and 40 g / l of peptone were mixed to simulate human bathing (adjusted to pH 7)
Was charged at a rate of 50 ml / day, and the turbidity and copper ion concentration after about 20 hours were measured.
In the case of exceeding (corresponding to bathing of five people), the bath water was replaced with the above-mentioned supply water. When the turbidity is 1.0 NTU or less, the supply water is replenished by pumping out 40 liters of bath water.

FIG. 2 shows the daily changes in turbidity, copper ion concentration and free chlorine concentration in the bath water in Example 1. FIG.
As is clear from the above, copper ions were blocked and inactivated by the elution of EDTA for 3 days from the start of operation, but the copper ion concentration was still 100 to 150 ppb and free chlorine was 0.2 to
The turbidity of the bath water exceeded 1.0 NTU during that period because it was slightly high at 0.3 ppm, and the bath water had to be replaced.
On the third day, the turbidity became slightly clear, so a part of the bath water was pumped out and replenished.
It is found that the concentration of free chlorine rapidly decreases and the turbidity can be maintained at a clear water quality at around 0.5 NTU.

(Embodiment 2) A bead (EDTA) obtained by solidifying EDTA and ascorbic acid, which are release agents, with sodium alginate was supplied to the drug supply section 11 of the apparatus used in Embodiment 1.
10 g, 10 g of ascorbic acid and 2 g of sodium alginate were dissolved in 100 ml of boiling water, and 0.5%
It was formed by dropping into a solution of CaCl ₂ . Here, except that the beads were immersed in bath water at 42 ° C., the amounts of EDTA and ascorbic acid eluted were adjusted to 0.1 to 1 g / day), except that the beads were filled. An experiment was performed in the same manner as in Example 1.

FIG. 3 shows the daily changes in the turbidity, the concentration of copper ions and the concentration of free chlorine in the bath water in Example 2. FIG.
As is clear from FIG.
pm or less, and the copper ion concentration is 1
Although it was as high as about 00 ppb, the turbidity was maintained at about 0.5 NTU after the third day. Compared to Example 1,
In addition to sequestering and inactivating copper ions by EDTA, free chlorine could be removed by elution of ascorbic acid.

Example 3 A drug supply unit 11 filled with the same release agent as in Example 2 was installed, and EDTA and ascorbic acid were added at the beginning of the experiment and at the time of bath water exchange, respectively.
g each. The experiment was conducted in accordance with Example 1 with respect to the experimental apparatus and the experimental procedure. FIG. 4 shows the daily changes in turbidity, copper ion concentration and free chlorine concentration in the bath water in Example 3. As is clear from FIG. 4, almost no copper ions and free chlorine were detected from the start of the experiment. As a result, the turbidity of the bath water was high on the day after the experiment was disclosed, but thereafter, the turbidity was as low as about 0.5 NTU. Water quality could be maintained. This is because EDTA and ascorbic acid were eluted by desorption, and EDTA and ascorbic acid were added to the bath water at the start of the experiment, so that the concentrations of copper ions and free chlorine, which are purification inhibitors, were reduced to low values from the start of the experiment. It could be maintained and the bath water purification started quickly.

(Comparative Example) The medicine supply section 11 was removed,
An experiment was performed using the same device and procedure as in Example 1.
FIG. 5 shows the daily changes in turbidity, copper ion concentration and free chlorine concentration in the bath water in the comparative example. As is clear from FIG. 5, the copper ion concentration and the free chlorine concentration in the bath water were as high as about 500 ppb and 0.4 ppm during the operation period, and as a result, the turbidity of the bath water was around 1.5 NTU and the bath water was around 1.5 NTU. It became cloudy and it became necessary to change bath water every day. This means that purification was not possible because the microorganisms could not be retained in the microorganism retaining portion because copper ions and free chlorine, which are bath water purification inhibitors, were contained at a high concentration.

As is evident from the comparison between the above Examples 1 to 3 and the Comparative Example, the water quality containing the bath water purification inhibitor is not effective for a chelating agent such as EDTA or ascorbic acid. It has been found that it is very effective to continuously release such a chlorine removing agent after releasing it.

[0038]

According to the first aspect of the present invention, when purifying bath water by decomposing dirt components such as sweat and dirt using microorganisms, the chelating agent is released in the middle of the path. Since the chelating agent can be supplied continuously, the chelating agent can be supplied continuously over a long period of time, and the influence of heavy metals or heavy metal ions that inhibit the growth of microorganisms that purify the bath water can be eliminated. It can decompose pollutants such as sweat and dirt by microorganisms in the microorganism holding part by a simple method and maintain clear water quality for a long period of time.Especially, since the chelating agent is released, the bath water evaporates. To eliminate the effects of heavy metals or heavy metal ions that inhibit the growth of microorganisms that purify bath water, even if tap water or hot water containing heavy metals or heavy metal ions is newly supplemented by reducing the amount of bath water due to hot water. Can also It is.

According to the second aspect of the present invention, in addition to the effects of the first aspect of the present invention, a microorganism for purifying bath water by a simple method since a chlorine removing agent is added. Free chlorine, which inhibits the growth of E. coli, can be more effectively removed. According to the third aspect of the present invention, in addition to the effects of the first or second aspect, the supply amount of the chelating agent is 20 per day.
Since the amount is 10 mg or more and 10 g or less for 0 liter of bath water, the chelating agent can be easily supplied without excess or deficiency.

According to a fourth aspect of the present invention, in addition to the effect of the second or third aspect, the supply amount of the chlorine removing agent is 200 liters per day. Is 10 mg or more and 10 g or less,
The chlorine remover can be easily supplied without excess or shortage. In the invention according to claim 5 of the present invention, in addition to the effects of the invention according to any one of claims 1 to 4, sodium alginate, κ-carrageenan, PVA, agar, cellulose acetate A chelating agent is contained in a cured product mainly containing one or more kinds of the above-mentioned agents to form a releasing agent for releasing the chelating agent, and the releasing agent is immersed in bath water to remove the chelating agent. Since the drug is released in bath water, the chelating agent can be released easily.

According to a sixth aspect of the present invention, in addition to the effects of the first aspect, the chelating agent is used at the beginning of operation or at the time of bath water exchange. Is supplied more than the controlled release supply amount, it is possible to cope with the case where the purification inhibitor is contained more than usual, such as at the beginning of operation or at the time of bath water exchange. The rising period of the purification can be shortened, and conventionally the bath water becomes cloudy for a while from the start of the operation, so that the bath tub needs to be cleaned, but the labor can be reduced.

According to the seventh aspect of the present invention, in addition to the effect of the sixth aspect of the present invention, in addition to the effects of the sixth aspect, the amount of the chelating agent supplied at the beginning of operation or at the time of bath water exchange is supplied. Since the amount to be supplied more than 20 mg and not more than 10 g for 200 liters of bath water, if the purification inhibitor is contained more than usual at the beginning of operation or at the time of bath water exchange, The chelating agent can be supplied without excess or deficiency.

According to the eighth aspect of the present invention, in addition to the effects of the sixth or seventh aspect, a chelating agent and a chlorine removing agent at the beginning of operation or at the time of bath water exchange. Is supplied more than the controlled release supply amount, and the supply amount of the chlorine remover at the beginning of the operation or at the time of bath water exchange is 20 mg or more and 10 g or less for 200 liters of bath water. When the purification inhibitor is contained more than usual, such as at the time of bath water exchange, the chlorine removing agent can be supplied without excess and deficiency.

According to the ninth aspect of the present invention, there is provided a bathtub, a purifying unit for circulating bathwater in the bathtub to decompose dirt components such as sweat and grime using microorganisms, and a bathwater. And a chemical supply unit for supplying the chelating agent by releasing the chelating agent, so that the chelating agent is continuously supplied over a long period of time with a simple configuration, thereby inhibiting the growth of microorganisms for purifying bath water. It is possible to provide a system without the influence of heavy metals or heavy metal ions.

In the invention according to claim 10,
In addition to the effect of the ninth aspect of the present invention, since a chemical supply unit for supplying a chelating agent and a chlorine removing agent is provided, the growth of microorganisms for purifying bath water is inhibited with a simple configuration. It is possible to provide a system for removing free chlorine. According to the eleventh aspect of the present invention, in addition to the effect of the ninth or tenth aspect, the supply amount of the chelating agent supplied from the medicine supply unit is 200 liters per day. Therefore, a system that can supply a chelating agent with a simple configuration without excess or deficiency can be provided.

According to the twelfth aspect of the present invention,
In addition to the effects of the invention according to claim 10 or 11, a chemical supply unit is provided for supplying a chlorine-removing agent by releasing the chlorine-removing agent, and the chlorine-removing agent supplied by being released from the chemical supply unit. Is 10 mg or more and 10 g or less for 200 liters of bath water per day, so that it is possible to provide a system for supplying a chlorine removing agent without excess or deficiency.

In the invention according to claim 13,
In addition to the effects of the invention described in any one of claims 9 to 12, the release agent for releasing and supplying the chelating agent from the drug supply unit is sodium alginate;
Since a chelating agent is contained in a cured product mainly containing one or more of κ-carrageenan, PVA, agar, cellulose acetate, etc., the chelating agent can be easily released and supplied. It can provide a system that can do it.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of the present invention.

FIG. 2 is a graph showing daily changes in turbidity, copper ion concentration and free chlorine concentration in bath water of Example 1 of the present invention.

FIG. 3 is a graph showing daily changes in turbidity, copper ion concentration and free chlorine concentration in bath water of Example 2 of the present invention.

FIG. 4 is a graph showing daily changes in turbidity, copper ion concentration, and free chlorine concentration in bath water of Example 3 of the present invention.

FIG. 5 is a graph showing daily changes in turbidity, copper ion concentration and free chlorine concentration in bath water of a comparative example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bath water purification apparatus 2 Circulation flow path 3 Bath tub 4 Water absorption part 5 Water discharge part 6 Pump 7 Filter material 8 Purification part 9 Sterilization tank 10 Heater 11 Chemical supply part

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akiju Hasegawa 1048 Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Works, Ltd.

Claims (13)

[Claims] 1. Purification of bath water wherein microorganisms are used to decompose dirt components such as sweat and grime to purify the bath water, wherein a chelating agent is desorbed and supplied in the middle of the path of the bath water. Method. 2. The method for purifying bath water according to claim 1, wherein a chlorine removing agent is added. 3. The supply amount of the chelating agent is 200 per day.
The method for purifying bath water according to claim 1 or 2, wherein the amount is from 10 mg to 10 g per liter of bath water. 4. The method according to claim 2, wherein the chlorine removing agent is supplied after being desorbed and released, and the supply amount of the chlorine removing agent is 10 mg or more and 10 g or less per 200 liters of bath water per day. Or the method for purifying bath water according to claim 3. 5. A release agent for releasing a chelating agent by containing a chelating agent in a cured product mainly containing one or more of sodium alginate, κ-carrageenan, PVA, agar, cellulose acetate and the like. The method for purifying bath water according to any one of claims 1 to 4, wherein a water release agent is formed in the bath water to release the chelating agent in the bath water. 6. The method for purifying bath water according to claim 1, wherein the chelating agent is supplied in an amount larger than the desorption supply amount at the beginning of operation or at the time of bath water exchange. 7. The amount of the chelating agent supplied at the beginning of the operation or at the time of bath water replacement which is larger than the controlled release supply amount is 20.
7. The method for purifying bath water according to claim 6, wherein the amount is from 20 mg to 10 g per 0 liter of bath water. 8. The supply amount of the chelating agent and the chlorine removing agent in the initial stage of the operation or at the time of bath water exchange is larger than the supply amount of the desorbing agent, and the supply amount of the chlorine removing agent at the beginning of the operation or at the time of bath water exchange is 200 liters. The method for purifying bath water according to claim 6 or 7, wherein the amount of the bath water is not less than 20 mg and not more than 10 g. 9. A bath tub, a purifying unit for circulating bath water in the bath tub to decompose dirt components such as sweat and dirt using microorganisms, and releasing and releasing a chelating agent into the bath water. A bath water purification system comprising a chemical supply unit. 10. The bath water purification system according to claim 9, further comprising a chemical supply unit for supplying a chelating agent and a chlorine removing agent. 11. The supply amount of the chelating agent supplied from the drug supply unit is 1 to 200 liters of bath water per day.
The bath water purification system according to claim 9 or 10, wherein the amount is from 0 mg to 10 g. 12. A chemical supply unit for supplying a chlorine-removing agent by releasing the chlorine-removing agent, wherein the supply amount of the chlorine-removing agent released and released from the chemical supplying unit is set to 200 liters of bath water per day. The bath water purification system according to claim 10 or 11, wherein the amount is 10 mg or more and 10 g or less. 13. A release agent for releasing and supplying a chelating agent from a drug supply unit, the release agent comprising sodium alginate,
13. A cured product containing one or more of κ-carrageenan, PVA, agar, cellulose acetate and the like as a main component, wherein a chelating agent is contained in the cured product. A bath water purification system according to claim 1.