JPH0889983A - Method and device for removing oil content/oily smell in hot spring water - Google Patents

Abstract

PURPOSE: To provide a method and device for removing oil content/oily smell capable of removing the oil content/oily smell incorporated in a hot spring water without reducing a hot spring effect. CONSTITUTION: The hot spring water 2 containing the oil content/oily smell is brought into contact with a porous body 18 to which a microorganism acclimatizes with the hot spring water 2 is stuck to strongly remove the oil content/oily smell in the hot spring water 2 by an interaction of a decomposing and moving function with the microorganism stuck to the porous body 18 and an adsorbing/removing function with the porous body 18 itself.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for removing oil and oil odor from hot spring water containing oil and oil odor, which removes oil and oil odor without decreasing hot spring efficacy. is there.

[0002]

2. Description of the Related Art Hot spring water that originates in or near the oil reserves contains a large amount of components that are effective for hot springs, but it also contains oils and odors. In many cases, it cannot be effectively used for pools. Therefore, there is a strong demand for the development of a technique for removing oil and oil odor in hot spring water without reducing the content of components effective for hot spring efficacy as much as possible.

Heretofore, as a technique for removing oil and oil odor, for example, as a technique for treating oil-containing wastewater such as ship bilge, an oil water separator has been used, or activated sludge ( Microbes flocked)
Is proposed (Japanese Patent Laid-Open No. 63-221).
895, Japanese Patent Laid-Open No. 5-317874).

[0004]

However, when an oil-water separator is used, there is a problem in that it is difficult to remove when the device is expensive or when oil is emulsified. In the case of using activated sludge, there is a problem that it takes time to reuse sludge and it becomes difficult to maintain a stable treatment capacity.
In any case, there is a difficulty as a means for removing oil and oil odor in hot spring water to obtain hot spring water suitable for hot spring treatment or hot spring pool.

Therefore, an object of the present invention is to solve the above problems, and it is suitable for hot spring treatment or hot spring pool by removing the oil content and oil odor contained in the hot spring water without lowering the hot spring efficacy. Method and device for removing oil and oil odor in hot spring water, which can obtain hot spring water and have a simple device configuration and can generate hot spring water suitable for hot spring treatment or hot spring pool relatively inexpensively Is to provide.

[0006]

The above object of the present invention is to bring hot spring water containing oil and oily odor into contact with a porous body to which microorganisms acclimated in the hot spring water are attached to obtain hot spring water. It is achieved by a method for removing oil and oil odor in hot spring water, which is characterized by removing oil and oil odor.

In the above method of removing oil and oily odor in hot spring water, the above object can also be achieved by a structure in which the microorganisms acclimatized with hot spring water containing oily oil and oily odor are mainly bacilli. It is possible.

Further, in the above method for removing oil and oil odor in hot spring water, the hot spring water containing oil and oil odor is aerated before being brought into contact with the porous body to which microorganisms acclimatized in the hot spring water adhere. The above object can also be achieved by a structure in which a part of oil content and oil odor in the hot spring water is removed by bringing the fine air supplied into the aeration tank through the tank into contact.

Further, the above object of the present invention is to provide a microbial treatment tank filled with a porous body having microorganisms acclimatized with hot spring water containing oil and oil odor, and hot spring water containing oil and oil odor. A hot water supply pipe passing through the microorganism treatment tank is provided, and by contacting the hot spring water with a porous body, oil content in the hot spring water
This can be achieved by an oil / oil odor removing device in hot spring water, which is characterized by removing oil odor.

In the oil / oil odor removing device for hot spring water, hot spring water containing oil / oil odor is supplied to the microbial treatment tank in the middle of a hot water supply pipe for supplying the microbial treatment tank. Also by a structure equipped with an aeration tank for bringing fine air into contact with the hot spring water, the structure in which the fine air passes through the porous body to which the microorganisms adhere, and the hot spring water is generated by an air lift by the fine air. The above object can be achieved by a structure in which the material circulates and passes through the porous body.

[0011]

According to the above-mentioned constitution of the present invention, the action of decomposing and removing oil and oil odor by the microorganisms adhering to the porous body and the action of adsorbing and removing oil and oil odor by the porous body are performed, and thereby the hot spring water is It can strongly remove the oil and oil odor of.

As the microorganism, a bacillus suitable for decomposing oil / oil odor is used. Furthermore, the hot spring water to be brought into contact with the porous body is passed through an aeration tank before contacting with the porous body to obtain fine air. By removing the oil and oil odor in the hot spring water to the atmosphere in advance by contacting the oil with the fine air, the effect of removing the oil and oil odor can be further enhanced. The oil content and oil odor contained in the hot spring water can be removed more reliably without lowering the temperature.

In addition, as for the apparatus configuration, a microbial treatment tank filled with a porous body having microorganisms acclimatized with hot spring water containing oil and oil odor is prepared, or, in addition to the microbial treatment tank, aeration is performed. Since it is only necessary to prepare tanks and prepare hot water supply pipes for passing hot spring water containing oil and oil odor to each of these tanks, the device configuration is simple.

Further, unlike the case where activated sludge is used, in the above-mentioned structure using the porous body, the size of the porous body can be set to an appropriate size to facilitate maintenance and at the same time to reduce oil content. -The removal rate of oily odor can be improved.

Further, when hot spring water containing oil and oil odor is passed through the aeration tank before being brought into contact with the porous body on which microorganisms are adhered, contact with fine air by the aeration tank, for example,
Components such as hydrogen sulfide, which is detrimental to hot spring efficacy, are diffused and removed into the atmosphere, or calcium ions, etc. that adhere to the porous body and reduce the ability of the porous body to remove oil and odor are deposited. Can be removed.

[0016]

FIG. 1 shows an embodiment of an oil / oil odor removing device in hot spring water according to the present invention. An oil / oil odor removing device 1 for hot spring water according to this embodiment includes a measuring tank 3 for temporarily storing hot spring water 2 containing oil / oil odor and flowing out at a constant flow rate, and a hot water supply pipe 4 from the measuring tank 3. Aeration tank 6 for bringing fine air 5 into contact with hot spring water 2 that has flowed in through, microbial treatment tank 7 for further treating hot spring water 2 treated by said aeration tank 6, and containing oil and oil odor A source pump 9 for pumping the hot spring water into the measuring tank 3 through a hot water supply pipe 8 is provided.

The hot water supply pipe 4 supplies the hot spring water 2 to the bottom of the aeration tank 6. The bottom of the aeration tank 6 is equipped with an air diffuser 12 for injecting the air supplied from the blower 11 into fine bubbles. That is, in this aeration tank 6, the fine air 5 in the form of bubbles is jetted from the air diffuser 12 equipped at the bottom, and the fine air 5 is brought into contact with the hot spring water 2 supplied from the hot water supply pipe 4. Hot spring water 2 in contact with fine air 5
Is carried to the upper part of the tank while repeating contact with the upward flow of the fine air 5, and the hot water supply pipe 1 communicated with the upper part of the tank.
3 is sent to the microbial treatment tank 7 side.

The hot water supply pipe 13 joins the hot water supply pipe 15 for supplying the hot spring water 2 from the measuring tank 3 to the microbial treatment tank 7 on the way, and opens at the bottom of the microbial treatment tank 7. The microbial treatment tank 7 is equipped with an air diffuser 16 at the bottom of the tank for injecting the air supplied from the blower 11 into fine air bubbles.
Further, a granular porous body 18 is provided at a middle height position of the tank, and a hot water supply pipe 19 for discharging the treated hot spring water 2 is provided at an upper portion of the tank. The porous body 18 is filled in a mesh-shaped container through which the hot spring water 2 can pass.

That is, the microbial treatment tank 7 injects the fine air 20 from the air diffuser 16 to the hot spring water 2 supplied to the bottom thereof, and permeates the hot spring water 2 rising while repeatedly contacting the fine air 20. Contact the body 18.

The hot spring water 2 directly supplied from the measuring tank 3 to the microorganism treatment tank 7 by the hot water supply pipe 15 is the porous body 1
8. Hot spring water 2 has a relatively high temperature, eg 40 ° C to 70 ° C
It is used to attach microorganisms that have acclimatized in a certain amount of hot spring water. That is, by leaving the porous body 18 in the hot spring water 2 for a certain period of time, microorganisms adhere to the porous body 18. Therefore, the hot water supply pipe 15 is not used during the process of removing oil and oil odor from the hot spring water 2. Therefore, opening / closing valves 22 and 23 for opening and closing these pipe lines are provided on the base end side (the measuring tank 3 side) of the hot water supply pipe 15 and the hot water supply pipe 4.

The method for removing oil and oil odor in hot spring water according to the present invention is carried out by using the above-described oil and oil odor removing device 1.
First, first, a fixed amount of hot spring water 2 is supplied from the measuring tank 3 to the microbial treatment tank 7 by the hot water supply pipe 15, and the porous body 18 is left in the hot spring water 2 for a fixed period of time, whereby the hot spring water of the source spring The state in which the microorganisms acclimatized in 2 adhere to the porous body 18 is created. However, the treatment for adhering the microorganisms to the porous body 18 is not limited to the above-mentioned method, and for example, the porous body 18 is supplied from the source to the source pump 9 without using the microorganism treatment tank 7.
The microorganisms may be adhered by leaving them in the flow path of the hot spring water 2 up to and the microorganism treatment tank 7 may be filled with the microorganisms.

In a state where the porous body 18 having an appropriate amount of microorganisms attached thereto is filled in the microorganism treatment tank 7, the open / close valve 23 of the hot water supply pipe 15 is closed, and instead, the open / close valve 22 of the hot water supply pipe 4 is opened. The hot spring water 2 which is opened and stored in the measuring tank 3 is caused to flow in order from the aeration tank 6 to the microorganism treatment tank 7 at a constant flow rate. That is, the method for removing oil and oil odor in hot spring water of the present invention is
First, the hot spring water 2 is sent to the aeration tank 6, and the oil content and the oil odor in the hot spring water 2 are removed by contact with the fine air 5, and then the hot water 2 is passed through the microbial treatment tank 7 and brought into contact with the porous body 18. The oil content and oil odor in the hot spring water 2 are further removed.

According to the above method for removing oil and oil odor in hot spring water, first, in the aeration tank 6, part of the oil and oil odor in the hot spring water 2 is released to the atmosphere by contact with the fine air 5. can do. Further, by contacting with the fine air 5, for example, components such as hydrogen sulfide, which are disadvantageous to the hot spring effect, are dissipated and removed into the atmosphere, or they are attached to the porous body 18 to cause an oil content and an oily odor due to the porous body. It is possible to deposit and remove calcium ions and the like, which cause a decrease in the removal function of

In the microbial treatment tank 7, the porous body 18
By the action of decomposing and removing the oil and oil odor by the microorganisms adhering to the oil and the action of adsorbing and removing the oil and oil odor by the porous body 18 itself, the oil and oil odor in the hot spring water can be strongly removed. it can. By removing the oil and oil odor in two stages in this way, it is possible to more reliably remove the oil and oil odor contained in the hot spring water without degrading the hot spring efficacy. You can get the hot spring water suitable for the hot spring pool.

In addition, as for the apparatus configuration, an aeration tank 6 and a microorganism treatment tank 7 are prepared, and hot water supply pipes 4, 13, 19 etc. for passing the hot spring water 2 containing oil and oily odor are provided in these tanks. All that is required is a simple device configuration.

Further, unlike the case where activated sludge is used, in this structure using the porous body 18, maintenance can be facilitated by setting the particle size of the porous body 18 to an appropriate size. At the same time, the removal rate of oil and oil odor can be improved, and a large amount of hot spring water suitable for hot spring treatment or hot spring pools can be produced relatively inexpensively.

The inventors of the present application conducted the following tests 1 and 2 for confirming the above-mentioned effects by using the oil / oil odor removing device 1 of one embodiment.

[Test 1] Aeration tank 6 and microorganism treatment tank 7
In each case, a bath having a hot water temperature of 40 ° C. to 70 ° C. and an effective capacity of 600 liters was used. The particle size of the porous body 18 filled in the microorganism treatment tank 7 is 10 mm.
Granulated cristobalite in
The filling amount was adjusted so as to occupy 50 v / v% with respect to the effective capacity of the microorganism treatment tank 7. In addition, this porous body 18
Is set at a predetermined position of the microbial treatment tank 7, the bottom mud collected from the gutter discharging the source is put into the microbial treatment tank 7, and the hot water from the hot water supply pipe 15 is fed into the microbial treatment tank 7. 2 was poured and allowed to stand for 1 month or more to attach the microorganisms acclimatized with the hot spring water 2 to the porous body 18. When the acclimation of the microorganisms is completed, the oil and odor removal process is started. In the case of this test, the acclimated microorganisms were mainly bacilli suitable for decomposing and removing oil and oil odor.

The hot spring water 2 pumped from the source is a carbonated spring containing mainly carbonate ions and hydrogen carbonate ions as effective components for the effect of the hot spring. The source hot spring water 2 having oil content and oily odor is sent to the measuring tank 3 by the source spring pump 9, and the aeration tank 6
And 150 to 600 liters / hr (hr is hour) from the measuring tank 3 so that the total treatment time by the microorganism treatment tank 7 is 2 to 8 hours, and the hot water 2 from the aeration tank 6 to the microorganism treatment tank 7 Shed. Then, in the case of the aeration tank 6, air was sent from the blower 11 to the air diffusing tube 12 at 30 liters / min, and the air was ejected as fine air 5 (to an extent that bubbles are 3 mm or less). Further, in the case of the microorganism treatment tank 7, 90 l / mi is supplied from the blower 11 to the air diffuser 16.
Air was sent in at n, and it was jetted as fine air 20 (to the extent that bubbles become 3 mm or less).

With respect to the hot spring water 2 discharged from the hot water supply pipe 19 after the treatment in the microbial treatment tank 7, the residual amount of oil (mg / liter), odor intensity, and evaporation residue are every 2 hours. (G / liter), the residual amount of carbonate ion and hydrogen carbonate ion was measured. The odor intensity, which is also called odor concentration, is a value obtained by dividing a constant value (200) by the minimum amount (unit: ml (milliliter)) of the sample that can detect the odor of the sample. For example, if the minimum amount of hot spring water 2 that can detect an oily odor is 10 ml, the odor intensity is 200 /
10 = 20. The following Table 1 shows the measurement results. The description'Tr 'in the table indicates that the content is below the detection limit (in this case, 0.2 mg / liter or less).

[0031]

[Table 1]

As is clear from Table 1 above, the oil content of 2 mg / liter initially contained could be below the detection limit when the treatment was carried out for 2 hours or more. And the odor intensity decreases as the processing time increases,
It was confirmed that the hot spring water, which had a strength of 29 at the beginning, had a strength of 8 after the treatment for 8 hours and had an excellent odor removal rate of 72.4%. In addition, the residual amount of carbonate ions and hydrogen carbonate ions, which are effective components for hot spring efficacy, was 2529 mg / liter at the beginning, while it was 2154 mg / liter even after 8 hours of treatment, showing almost no decrease. I understand. And 6-8
It has been confirmed that the hot spring water 2, which has been treated for a time, can be effectively used as a hot spring treatment or a hot spring pool, etc. without causing ordinary people to feel uncomfortable and without causing oil content to pollute the bathtub. It was

[Test 2] Aeration tank 6 and microbial treatment tank 7
In each case, a bath having a hot water temperature of 40 ° C. to 70 ° C. and an effective capacity of 600 liters was used. Then, in the porous body 18 to be filled in the microorganism treatment tank 7, cristobalite having a particle diameter of 10 mm is granulated, as in the case of the test 1.
The baked material was used and the filling amount was adjusted so as to occupy 50 v / v% with respect to the effective capacity of the microorganism treatment tank 7.
Further, the porous body 18 is set at a predetermined position of the microorganism treatment tank 7, and the bottom mud collected from the gutter discharging the source spring is introduced into the microorganism treatment tank 7 and fed into the microorganism treatment tank 7. By pouring hot spring water 2 from the hot water pipe 15 and leaving it for 1 month or more, the microorganisms acclimatized in the hot spring water 2 are made into the porous body 1.
8 was attached. When the acclimation of the microorganisms is completed, the oil and odor removal process is started. Also in this test, the acclimated microorganisms were mainly bacilli suitable for decomposing and removing oil and oil odor.

The hot spring water 2 drawn from the source is a carbonated spring containing mainly carbonate ions and hydrogen carbonate ions as components effective for the effect of the hot spring. The source hot spring water 2 having oil content and oily odor is sent to the measuring tank 3 by the source spring pump 9, and the aeration tank 6
And 420 to 1200 liters / hr (hr is hour) from the metering tank 3 so that the total treatment time by the microorganism treatment tank 7 is 1 to 3 hours. Shed. And in the case of the aeration tank 6,
Air was sent from the blower 11 to the air diffusing tube 12 at 80 liters / min, and was ejected as fine air 5 (air bubbles are about 3 mm or less). Further, in the case of the microorganism treatment tank 7, 100 liters / liter from the blower 11 to the air diffuser 16
The air is sent in at a min, and the fine air 20 (air bubbles are 3 m
m or less).

After the treatment in the microorganism treatment tank 7 is completed, the hot spring water 2 discharged from the hot water supply pipe 19 is subjected to the residual oil amount (mg / liter) every one hour, as in the case of the test 1. ), Odor intensity, evaporation residue (g / liter), and residual amounts of carbonate ion and hydrogen carbonate ion were measured. Table 1 below
Shows the measurement results.

[0036]

[Table 2]

As is clear from Table 2 above, the oil content of 2 mg / liter initially contained could be below the detection limit when the treatment was carried out for 1 hour or more. And the odor intensity decreases as the processing time increases,
It was confirmed that the hot spring water, which initially had a strength of 29, had a strength of 10 after the treatment for 3 hours and had an excellent odor removal rate of 65.5%. Also,
The residual amount of carbonate ions and hydrogen carbonate ions, which are effective components for hot spring efficacy, was initially 2564 mg / liter, but it remained 2227 mg / liter after 3 hours of treatment, indicating that there is almost no decrease. . In addition, the hot spring water 2 that has been treated for 3 hours can be effectively used as a hot spring treatment or a hot spring pool, etc. without causing ordinary people to feel uncomfortable and without causing oil content to pollute the bathtub. Was confirmed.

As is clear from the comparison between Test 1 and Test 2, the time required to remove oil and oil odor from the hot spring water 2 is 5 or 20% of fine air to the aeration tank 6 and the microorganism treatment tank 7. Can be adjusted by adjusting the supply amount of the hot spring water 2 to the aeration tank 6 and the microbial treatment tank 7, and by optimizing the supply amount or the capacity of each tank, the hot water temperature can be adjusted. It is also possible to shorten the processing time so that the oil / oil odor removal processing is completed within a range in which the oil does not cool more than necessary.

In the embodiment described above, the aeration tank 6 and the microorganism treatment tank 7 are provided one by one, but it is conceivable that such equipment is arranged in multiple stages. .

Also, in the microbial treatment tank 7, since the fine air 20 is supplied, and the contact of the hot spring water 2 with the fine air 20 provides the effect of releasing oil and oil odor into the atmosphere, When the content of oil and oil odor in the former source is low, or when it is desired to further reduce the cost of the device, it is possible to omit the aeration tank 6 and perform the treatment only with the microorganism treatment tank 7.

In the above embodiment, cristobalite having a particle size of 10 mm was used as the porous body 18.
It is also possible to use cristobalite having other particle diameters, or cristobalite formed and fired in an appropriate form. Instead of cristobalite, it is also possible to use an inorganic porous material such as diatomaceous earth or zeolite, or to use a calcined product or a granulated product of these diatomaceous earth or zeolite.

In the above embodiment, fine air is configured to pass through the porous body to which the microorganisms are attached,
Although the hot spring water 2 in the treatment layer 7 is circulated, the present invention is not limited to such a configuration, but may be configured as shown in FIG. That is, in the apparatus shown in FIG. 2, the hot spring water 2 circulates from the central side of the treatment layer to the outer peripheral side of the tank and passes through the porous body 18 by the action of the air lift caused by the fine air 20 moving upward in almost the center of the treatment layer 7. Is configured to.

[0043]

According to the method and apparatus for removing oil and oil odor in hot spring water of the present invention, the action of decomposing and removing oil and oil odor by microorganisms adhering to the porous body and the oil and oil odor of the porous body can be eliminated. By interacting with the adsorption removal action, it is possible to strongly remove oil and oil odor in hot spring water. And, as the above-mentioned microorganism, a bacillus suitable for decomposing oil / oil odor is used, and further, the hot spring water to be brought into contact with the porous body is passed through an aeration tank before being brought into contact with fine air. By releasing a part of the oil and oil odor in the hot spring water into the atmosphere in advance by contacting with the fine air, the effect of removing the oil and oil odor can be further enhanced, and the hot spring efficacy is reduced. Instead, it is possible to more reliably remove the oil content and oily odor contained in the hot spring water, and obtain hot spring water suitable for hot spring treatment or for a hot spring pool. In addition, the equipment configuration is to prepare a microbial treatment tank filled with a porous body having microorganisms acclimatized with hot spring water containing oil and oil odor, or to prepare an aeration tank in addition to the microbial treatment tank. However, it is only necessary to provide hot water supply pipes for passing hot spring water containing oil and oil odor in each of these tanks, and the device configuration is simple. Also, unlike the case where activated sludge is used, in this configuration using a porous body, by setting the porous body to an appropriate size, maintenance management can be facilitated, and at the same time, oil content and oil odor can be reduced. It is possible to improve the removal rate of hot spring water, and it is possible to relatively inexpensively generate a large amount of hot spring water suitable for hot spring treatment or hot spring pool. Further, when hot spring water containing oil and oil odor is passed through the aeration tank before contacting with the porous body on which microorganisms adhere, contact with fine air by the aeration tank, for example, does not affect hot spring efficacy. To dissipate beneficial components such as hydrogen sulfide into the atmosphere, or to deposit and remove calcium ions, etc. that adhere to the porous body and reduce the ability of the porous body to remove oil and oil odor. As a result, the hot spring efficacy can be improved and, at the same time, the maintenance frequency of the microorganism treatment tank can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram of an oil / oil odor removing device in hot spring water according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of an oil / oil odor removing device in hot spring water according to another embodiment of the present invention.

[Explanation of symbols]

 1 Oil / Odor Removal Device 2 Hot Spring Water 3 Measuring Tank 4 Hot Water Pipe 5 Micro Air 6 Aeration Tank 7 Microbial Treatment Tank 8 Hot Water Pipe 9 Source Spring Pump 11 Blower 12 Hot Water Pipe 15 Hot Water Pipe 16 Diffuser Pipe 18 Porous body 19 Hot water supply pipe 20 Fine air 22,23 Open / close valve

Claims (7)

[Claims] 1. The hot spring water containing oil and oil odor is brought into contact with a porous body having microorganisms acclimatized with the hot spring water to remove the oil and oil odor in the hot spring water. How to remove oil and odor in hot spring water. 2. The method for removing oil and oil odor from hot spring water according to claim 1, wherein the microorganisms acclimated in the hot spring water containing oil and oil odor are mainly bacilli. 3. The hot spring water containing oil and oil odor is fine air supplied through the aeration tank into the aeration tank before being brought into contact with the porous body to which microorganisms acclimatized with the hot spring water are attached. The oil content / oil odor removal method in hot spring water according to claim 1 or 2, wherein a part of the oil content / oil odor in the hot spring water is removed by contacting with the hot water. 4. A microbial treatment tank filled with a porous body to which microorganisms acclimatized with hot spring water containing oil and oil odor are filled, and hot spring water containing oil and oil odor is passed through the microbial treatment tank. An oil / oil odor removing device in hot spring water, comprising: a hot water pipe, and removing the oil / oil odor in the hot spring water by bringing the hot spring water into contact with the porous body. 5. An aeration tank for contacting fine air with the hot spring water supplied to the microbial treatment tank is provided in the middle of the hot water supply pipe for supplying the hot spring water containing oil and oil odor to the microbial treatment tank. The device for removing oil and oil odor in hot spring water according to claim 4, wherein 6. The oil / oil odor removing device in hot spring water according to claim 4, wherein the fine air is configured to pass through a porous body having the microorganisms attached thereto. 7. The oil component in the hot spring water according to claim 4, wherein the hot spring water is circulated by the air lift of the fine air and passes through the porous body.
Oil odor removal device.