JP2009066467A - Manufacturing method of aqueous solution of dissolved ozone and supersaturated dissolved oxygen of three or more times of saturated concentration, and use method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a use method of an aqueous solution containing nano-region ozone bubbles effectively using the feature thereof, since in the conventional manufacturing method of supersaturated gas dissolved water of the pressurization dissolving method, the supersaturated state is difficult to be kept after returning to the atmospheric pressure, undissolved gas is discharged to the atmosphere causing more consumption of gas, the larger the bubble diameters are, a larger apparatus is needed, and measures are requested for keeping the useful effect of ozone over a long period, considering the above problem of ozone. <P>SOLUTION: The gas-liquid mixing dissolving apparatus formed by combining a gas-liquid mixing dissolving means provided with a linear slit in a fluororesin pipe with a classifying recycling means that the present applicant has previously proposed, enables manufacturing of the aqueous solution of dissolved ozone and supersaturated dissolved oxygen of three or more times of saturated concentration. The aqueous solution has a superior sterilization effect, contains nano-region bubbles, discharges very little ozone into the atmosphere, and performs sterilization, water treatment, wastewater treatment, or corrosion prevention of sewerage pipes by using low rising speed in water. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a method for producing an aqueous solution of dissolved ozone and a supersaturated dissolved oxygen that is at least three times the saturated concentration and a method of using the same.

A method for producing gaseous supersaturated water has already been proposed. Many are methods of making supersaturated water by dissolving gas under pressure as disclosed in JP-A-9-117755. In addition, there is one using a venturi tube as disclosed in JP-A-7-308556. However, as shown in Non-Patent Document 1, supersaturated water generally does not last long. Moreover, it was extremely difficult to maintain a supersaturated state when the pressure was reduced to atmospheric pressure. Ozone, which is an oxygen isotope, is known to have strong bactericidal, oxidizing, and bleaching powers. Ozone water that dissolves ozone in water using these properties is used in factories and hospitals. It is used for a sterilization apparatus installed in a semiconductor wafer or a semiconductor wafer cleaning apparatus. For example, in JP-A-9-19376, JP-A-9-14368 and JP-A-2003-29940, cleaning and sterilization of pollutants adhering to foods is effectively performed using ozone by the cleaning and sterilizing effect of ozone. A cleaning device is shown. Japanese Patent Application Laid-Open Nos. 7-236461 and 2-231066 disclose a method for further effective cleaning and sterilization by using fine bubbles together with ozone. However, since ozone is easily decomposed in a liquid, there is a problem that the concentration decreases in a short time. For this reason, it is necessary to supply a large amount of ozone over a long period of time for sterilization and disinfection. The present applicant previously proposed a gas-liquid mixing and dissolving apparatus in Patent Document 1 that combines a gas-liquid mixing and dissolving means in which a linear slit is provided in a fluororesin pipe and a classification recycling means. This dissolution apparatus enabled the production of nano-sized bubbles and the production of supersaturated gas-dissolved water. As a result of earnestly examining the use of various fields using ozone by using the gas-liquid mixing and dissolving apparatus, the present applicant, as a result of coexisting dissolved ozone and supersaturated dissolved oxygen, sterilization method for foods, wastewater treatment method Since a remarkable effect was confirmed by a method for purifying water, a method for preventing corrosion of sewer pipes, etc., it will be disclosed below.
Japanese Patent Application No. 2007-140039 "New Technology for Using Ozone", Sanyu Shobo, p. 74-83, 1988

  Conventionally, as a method of dissolving ozone and oxygen in water, ozone and oxygen gas are sucked and mixed with an ejector, the liquid phase is swirled and the gas phase is sucked into a negative pressure vortex, and the gas phase is sucked into the liquid phase. There are techniques such as crushing and mixing. However, the larger the bubble particle size of dissolved ozone and oxygen gas, the more undissolved gas is released into the atmosphere, and the ozone gas requires an excluding device, and the amount of gas consumed increases and the device becomes larger. For this reason, there is a demand for measures for maintaining the useful effects of ozone over a long period of time. Accordingly, the main object of the present invention is to achieve the ultrafine particle-based bubble particle size that can be realized by the gas-liquid mixing and dissolving apparatus combining the gas-liquid mixing and dissolving means and the classification and recycling means previously proposed in Patent Document 1. Providing a method for producing supersaturated gas aqueous solution containing (10 μm or less), and application to disinfection, wastewater treatment, water purification, sewer pipe corrosion prevention using aqueous solution of dissolved oxygen and supersaturated dissolved oxygen more than 3 times the saturated concentration Is to provide.

  The applicant of the present invention described above in Patent Document 1 using the gas-liquid mixing and dissolving apparatus of FIG. 1 that combines the proposed gas-liquid mixing and dissolving means of FIG. 2 and the classification and recycling means of FIG. The inventors have found that an aqueous solution of supersaturated dissolved oxygen can be produced, and have further confirmed how to use the aqueous solution. That is, the aqueous solution produced by the gas-liquid mixing and dissolving apparatus of the present invention has a small ozone release to the atmosphere and a slow rising rate in water and a typical bacterial size (0.5 to 3 μm). This is a feature that includes the same size and larger bubble particle size as well as its production method and its use for sterilization, water treatment, wastewater treatment, and sewer pipe corrosion prevention.

The main contents of the present invention are as follows.
1. The ozone-oxygen gas and water are dissolved in gas-liquid mixture and dissolved by means of gas-liquid mixing and dissolving means and classification recycling means provided with linear slits in the fluororesin pipe of Patent Document 1. It became possible to produce an aqueous solution of supersaturated dissolved oxygen three times or more.

2. It was confirmed that the aqueous solution had an excellent bactericidal effect.

3. A sterilization method characterized by improving the sterilization effect by contacting with food in the above aqueous solution has become possible

4). It is characterized by improving the sterilizing effect by passing bubbles in the aqueous solution and bubbles adhering to the food by passing through a bubble crushing means by ultrasonic treatment after the contact treatment with the food in the aqueous solution or simultaneously with the treatment. Sterilization method became possible.

5). Using the above aqueous solution, the mixed gas ejector shown in FIG. 4 that is driven by the discharge pressure of the pump is arranged at the discharge port of the aqueous solution, and the low oxygen solution around the discharge port is introduced by the negative suction pressure of the mixed gas ejector. Water treatment characterized by mixing and stirring with aqueous solution to increase dissolved oxygen concentration and promoting oxygenation with the injection amount of aqueous solution as small as possible relative to the amount of treated water and decomposing sludge with ozone in aqueous solution And wastewater treatment methods became possible.

6). 4 is disposed at the discharge port of the aqueous solution, and the air is sucked in with the generated negative suction pressure to be mixed and stirred with the aqueous solution. A bubble with a diameter of 3 mm or less is generated, and a low oxygen solution around the discharge port is introduced by the suction negative pressure generated by the discharge pressure of the mixed solution, and dissolved with the injection amount of the aqueous solution as small as possible relative to the treated water amount. It is characterized by the fact that the oxygen concentration is increased and discharged, and sludge is decomposed by ozone in the aqueous solution, and the surrounding water is raised and stirred by the air lift effect of the generated bubbles to promote oxygenation A water treatment and wastewater treatment method characterized in that it is made possible.

7. By using the above aqueous solution and supplying it into the sewer pipe, the dissolved oxygen concentration of the waste water is increased with an injection amount of the aqueous solution that is as small as possible relative to the amount of waste water, promoting oxygenation and preventing the generation of hydrogen sulfide. A sewer pipe corrosion prevention method, which is characterized by decomposing wastewater sludge with ozone in aqueous solution, has become possible.

  The aqueous solution according to the present invention is capable of gas-liquid mixing and dissolution at a low pressure of about atmospheric pressure to about 0.02 MPa, and the atmospheric release of ozone by the classification and recycling means is minute, and any dissolved ozone concentration and supersaturated dissolved oxygen concentration. The ability to produce an aqueous solution and the amount of oxygen used can be greatly reduced. In addition, since the manufacturing apparatus can be installed on land, the operation and maintenance of the equipment are easy, and a wide range of water treatment can be efficiently performed by arranging and switching the aqueous solution supply pipes at a number of locations.

  In the method of using the aqueous solution according to the present invention, by using the bubble crushing means in combination, the generation of hydroxyl radical having an oxidation-reduction potential equal to or higher than ozone is promoted, and the sterilizing power can be remarkably improved.

  In the water treatment and wastewater treatment method using the aqueous solution according to the present invention, by using an air-fueled ejector together, the low oxygen liquid around the discharge port is sucked only by the discharge pressure of the pump of the manufacturing apparatus, and the amount of the treated water is as small as possible. By increasing the dissolved oxygen concentration with the injection amount of the aqueous solution and then increasing the discharge amount to enhance the stirring effect, the growth rate of aerobic microorganisms can be increased and sludge can be decomposed by ozone in the aqueous solution. Furthermore, by generating the introduced air as bubbles of 3 mm or less, the aerobicization can be promoted by raising the surrounding water by the air lift effect and stirring.

  By injecting the aqueous solution according to the present invention into the sewer pipe, the dissolved oxygen concentration of the waste water is increased with the injection amount of the aqueous solution as small as possible relative to the waste water amount to prevent the generation of hydrogen sulfide, and at the same time, the decomposition of the waste water sludge by ozone in the aqueous solution. It is possible to prevent corrosion of a sewer pipe characterized by

The method for producing and using the dissolved ozone and the aqueous solution of supersaturated dissolved oxygen that is at least three times the saturated concentration according to the present invention will be described in detail.

  The production of the aqueous solution of dissolved ozone and supersaturated dissolved oxygen at least three times the saturated concentration according to the present invention is performed by combining the gas-liquid mixing and dissolving means of FIG. 2 and the classifying and recycling means of FIG. Perform by device. First, after water is introduced into the circulating water tank by the liquid phase supply means, it enters the gas-liquid mixing and dissolving means installed on the suction side of the pump. On the other hand, oxygen is sent within the pressure range of atmospheric pressure to about 0.02 MPa by the gas phase supply means, converted into ozone by the ozone generator, and then enters the gas-liquid mixing and dissolving means installed on the suction side of the pump together with water. After the gas-liquid mixture is dissolved, it is discharged by a pump, and further gas-liquid mixed again by a second gas-liquid mixture dissolving means. Thereafter, bubbles having a large particle size in the solution are separated by a classifying unit installed at the outlet of the gas-liquid mixing and dissolving unit. Bubbles having a large particle diameter are returned to the gas-liquid mixing means on the suction side of the pump by the recycling means via the gas vent valve, and are again gas-liquid mixed and dissolved. The aqueous solution that has passed through the classification means is further gas-liquid mixed and dissolved by the third gas-liquid mixing and dissolving means, and is returned to the circulating water tank for circulation. As a result, the dissolved ozone concentration is 0.1 mg / L or more, and the dissolved oxygen concentration is 42.48 mg / L (supersaturated dissolved oxygen concentration that is three times the saturation concentration of 14.16 mg / L at a water temperature of 0 ° C. and 1 atm). Manufactured as an aqueous solution consisting of ozone and supersaturated dissolved oxygen containing bubbles of dissolved ozone and dissolved oxygen, the ozone release to the atmosphere is minute, the rate of bubbles rising in water is slow, and the size of typical bacteria An aqueous solution containing the same size as (about 0.5 to 3 μm) and a larger bubble particle size is produced.

  By using the above aqueous solution and bringing it into contact with food, ozone bubbles coalesced on the surface of the food can be adhered to sterilize the food. In addition, after the contact treatment with the aqueous solution or simultaneously with the treatment, the generation of hydroxyl radical having an oxidation-reduction potential higher than ozone is promoted by passing the bubble crushing means by ultrasonic treatment and crushing the bubbles adhering to the food, By improving the sterilizing power, food can be sterilized.

  4 is arranged at the supply outlet of the aqueous solution, and the low oxygen solution around the discharge port is introduced by the negative suction pressure of the mixed gas ejector. Water treatment characterized by increasing the dissolved oxygen concentration by mixing and stirring with aqueous solution to promote aerobicization with the injection amount of aqueous solution as small as possible relative to the amount of treated water and decomposing sludge with ozone in aqueous solution And wastewater treatment.

  The above aqueous solution is introduced into the air-fuel mixture ejector shown in FIG. 4 which is a mixing and stirring means driven by the discharge pressure at the supply outlet. Generates bubbles of 3 mm or less, and introduces a low oxygen solution around the discharge port by the suction negative pressure of the mixed gas ejector generated by the discharge pressure of the mixed solution to increase the dissolved oxygen concentration and sludge by ozone in the aqueous solution Can be decomposed. At the same time, the water treatment is characterized by promoting aerobicization with an injection amount of an aqueous solution that is as small as possible relative to the amount of treated water by circulating water using the air lift effect of bubbles having a diameter of 3 mm or less. And wastewater treatment.

By injecting the above-mentioned aqueous solution into the sewer pipe, the dissolved oxygen concentration in the low-oxygen waste water is raised with the injection amount of the aqueous solution as small as possible relative to the waste water amount to prevent the generation of hydrogen sulfide and the sludge caused by ozone in the dissolved water It is possible to prevent corrosion of a sewer pipe characterized by performing decomposition.
Next, embodiments of the present invention will be described with reference to the drawings.

  EXAMPLES Hereinafter, an Example is shown and this invention is demonstrated more concretely. However, the scope of the present invention is not limited to the examples.

A method for preparing an aqueous solution composed of dissolved ozone and supersaturated dissolved oxygen that is at least three times the saturated concentration is shown.
The aqueous solution of the present invention was prepared using the gas-liquid mixing and dissolving apparatus shown in FIG. The gas-liquid mixing and dissolving apparatus of FIG. 1 is proposed in Patent Document 1, and the contents are as follows. FIG. 2 shows gas-liquid mixing and dissolving means, in which one end of a slit film 201 provided with a linear slit in a fluororesin pipe is processed into a pipe end face blind 201a and attached to a storage container 204 with an outer metal fitting 202 and an inner metal fitting 203. Yes, it is used as gas-liquid mixing and dissolving means 104, 106, and 110 through which water and oxygen are introduced through the gas-liquid inlet 205 and passed therethrough. FIG. 3 shows classification means. After introducing a gas-liquid mixed and dissolved aqueous solution from the outside of the cylindrical wedge wire screen 301 to classify bubbles having a large particle size, the gas passes through a gas vent valve 303 and is recycled to the suction side of the pump 105. Return to the gas-liquid mixing and dissolving means 104 installed in the above. The gas-liquid mixing and dissolving apparatus shown in FIG. 1 includes three gas-liquid mixing and dissolving means, a classification means 107, and a recycling means 109.
The aqueous solution was produced as follows. First, water was supplied from the liquid phase supply means 101 to the circulating water tank 111 and then introduced into the gas-liquid mixing and dissolution means 104 installed on the suction side of the pump 105. Further, oxygen passes from the gas phase supply means 102 through the ozone generator 103 within the range of atmospheric pressure to about 0.02 MPa, and is introduced into the gas-liquid mixing and dissolving means 104, so that water, oxygen and ozone are mixed and dissolved in the gas-liquid mixture. Then, the gas is mixed and dissolved by the gas / liquid mixing / dissolving means 106 through the pump 105. The classifying means 107 installed after the gas-liquid mixing and dissolving means 106 separates bubbles having a particle size larger than about 0.5 mm in the aqueous solution and recycles them through the gas vent valve 108 so that the gas on the suction side of the pump 105 is recycled. It returns to the liquid mixing means 104, and gas-liquid mixing is dissolved again. The aqueous solution that has passed through the classification means 107 is further gas-liquid mixed and dissolved by the gas-liquid mixing and dissolving means 110 and returned to the circulating water tank 111. As a result, from the dissolved ozone and the supersaturated dissolved oxygen having a dissolved ozone concentration of 0.1 mg / L or more and a dissolved oxygen concentration of 42.48 mg / L (supersaturated dissolved oxygen that is three times the saturated concentration at 0 ° C. and 1 atm). As an aqueous solution.
The bubble diameter of dissolved ozone and supersaturated dissolved oxygen in the aqueous solution is 10 μm or less, including the same size and larger bubble diameter of typical bacteria (0.5 to 3 μm) for sterilization. It turns out that it is suitable. Table 1 shows the particle diameters of the bubbles.

Further, the bubble rising speed in water is slow, and the bubble rising speed is shown in Table 2.
Further, ozone emission to the atmosphere is very small, and the ozone gas emission concentration of the aqueous solution is shown in Table 3.

Further, the gas-liquid mixed dissolution method of the present invention and the dissolution capability of the pressure dissolution method and the shear method, which are typical dissolution methods, are the void fraction of the gas phase (the value obtained by dividing the gas phase amount by the total amount of the gas phase and the liquid phase). ) And are shown in Table 4.

Comparative Example 1 (Preparation of ozone and oxygen aqueous solution by mixed gas ejector method)
The aqueous solution was manufactured with the dissolution apparatus by the ejector system shown in FIG.
The detailed structure of the air-fueled ejector 506 used in the above apparatus is as shown in FIG. Water is introduced from the supply port 404 and air is sucked from the gas phase suction port by the suction negative pressure generated at the outlet of the contraction unit 402 disposed in the main body 401 and mixed with the aqueous solution. It is discharged as bubbles. Further, the structure has a structure in which surrounding water is sucked from the liquid phase suction port by the suction negative pressure generated at the outlet of the rectifying unit 403, mixed and stirred, and discharged from the discharge port 407.
In FIG. 5, water is supplied to the circulating water tank 509 by the liquid phase supply means 501 and is introduced from the pump 504 to the air-fuel mixture ejector 506. Ozone and oxygen gas coming out of the ozone generator 503 by the gas phase supply means 502 enter the gas phase inlet 507 by the suction negative pressure generated by the discharge pressure and mix with water. Furthermore, an aqueous solution composed of dissolved ozone and dissolved oxygen was manufactured by sucking surrounding water from the liquid phase suction port 508 by the suction negative pressure generated by the discharge pressure, mixing and stirring, and discharging the mixture.

Comparative Example 2 (Preparation of ozone and oxygen aqueous solution by bubbling using a porous material)
The aqueous solution was manufactured with the melt | dissolution apparatus using the porous material of FIG. Water is supplied to the circulating water tank 607 by the liquid phase supply means 601 and circulated from the pump 604 through the supply pipe 605. After supplying oxygen to the ozone generator 603 by the gas phase supply means 602, it was introduced into a porous material 606 for commercial water tank bubbling, and an aqueous solution composed of dissolved ozone and dissolved oxygen was produced by bubbling.

Regarding the aqueous solution obtained in Example 1, the aqueous solution obtained by gas-liquid mixing and dissolution by the negative suction pressure of the mixed gas ejector of Example 2, and the aqueous solution by bubbling using the porous material of Example 3, the amount of circulating water and the amount of supplied gas are set. Table 5 shows the results of comparing the solubility of oxygen under the same conditions. After about 30 seconds, it became oversaturated 3 times or more.
Table 6 shows the rate of decrease in dissolved oxygen concentration over time when oxygen was dissolved in tap water by the gas-liquid mixed dissolution method of the present invention and left at room temperature and atmospheric pressure.
It can be seen that the supersaturation is maintained more than 3 times after about 190 hours (8 days).

As shown in FIG. 7, an aqueous solution was produced in the same procedure as in Example 1. The gas-liquid mixing and dissolving apparatus 701 is a manufacturing apparatus. After the produced aqueous solution was introduced into the sterilization tank 703 and contacted with the food 705 or simultaneously with the food 705, the sterilizing effect of the food 705 was confirmed by passing through the ultrasonic treatment device 704.
Table 7 shows the evaluation results of the bactericidal effect.

As shown in FIG. 8, an aqueous solution was produced with a gas-liquid mixing and dissolving device 801 in the same manner as in Example 1. The produced aqueous solution was introduced into the food processing apparatus 803 as food production water, mixed and brought into contact with the food 804 to effect sterilization, and the sterilization effect was confirmed.
Table 8 shows the evaluation results of the bactericidal effect.

As shown in FIG. 9, an aqueous solution was produced by a gas-liquid mixing and dissolving apparatus 901 in the same manner as in Example 1. The manufactured aqueous solution was supplied to an ultrasonic sprayer or a spray generator 903, introduced into the food sterilizer 904 in a sprayed state, and sterilized by contacting with the food 905 and air.
Table 9 shows the results of sterilization evaluation by the sterilization method.

As shown in FIG. 10, an aqueous solution was produced using a gas-liquid mixing and dissolving apparatus 121 using the same procedure as in Example 1. The produced aqueous solution was introduced into an ice making device 123 to make sherbet or ice, and then sterilized by contacting with the food 124.
Table 10 shows the results of sterilization evaluation by the sterilization method.

As shown in FIG. 11, an aqueous solution was produced with a gas-liquid mixing and dissolving device 131 by the same procedure as in Example 1.
The structure of the air-fuel mixture ejector 133 attached to the above apparatus is the same as that of FIG. 4 described in the first comparative example.
The aqueous solution produced by the gas-liquid mixing and dissolving apparatus 131 is introduced into the air-fueled ejector 133 attached to the tip of the supply pipe 132 installed in the bottom water area 137 such as a closed water area, and the suction negative pressure generated by the discharge pressure. Then, water in the oxygen-free water region of the closed water region or the like bottom layer 137 is introduced from the liquid phase suction port 134 and mixed and stirred with the aqueous solution to increase the dissolved oxygen concentration and discharge. As a result, it is possible to promote oxygenation in the anoxic water region of the closed water region and the like bottom layer 137 with an injection amount of the aqueous solution as small as possible relative to the treated water amount, and to decompose sludge and purify water by ozone in the aqueous solution.
Table 11 shows the results of increasing the dissolved oxygen concentration after the aqueous solution was mixed and stirred in water having a dissolved oxygen concentration of 0.1 mg / L in an almost oxygen-free state.



Furthermore, Table 12 shows the results of sludge decomposition by ozone in the aqueous solution.

As shown in FIG. 12, an aqueous solution was produced using a gas-liquid mixing and dissolving apparatus 141 having the same flow as in Example 1. As the air-fuel mixture ejector 143 to be mounted on the above apparatus, the same air-fuel ejector used in Comparative Example 1 as that in FIG. 4 was used. The aqueous solution exiting the gas-liquid mixing and dissolving device 141 is introduced into the air-fuel mixture ejector 143 attached to the tip of the supply pipe 142 in the intermediate water area 148 such as a closed water area. At the same time, due to the suction negative pressure generated by the discharge pressure, air is sucked in from the air inlet 144 on the water and introduced into the gas-phase inlet 145. After generating bubbles with a particle size of 3 mm or less and mixing and stirring with an aqueous solution, low oxygen water around the intermediate layer 148 such as a closed water area is introduced from the liquid phase suction port 146 with a negative suction pressure generated at a discharge pressure. Then, the dissolved oxygen concentration is increased and discharged, and further, low oxygen water around the intermediate layer 148 such as a closed water area is raised to the water surface and circulated by utilizing the air lift effect of bubbles having a particle size of 3 mm or less. Thus, aerobicization was promoted with an injection amount of the aqueous solution as small as possible relative to the amount of treated water, and sludge was decomposed and purified by ozone in the aqueous solution.
As a result, the water in the low oxygen state (dissolved oxygen concentration 3.0 mg / L) increased in dissolved oxygen concentration as shown in Table 13 by mixing the aqueous solution.

As shown in FIG. 13, an aqueous solution was produced using a gas-liquid mixing and dissolving device 151 in the same manner as in Example 1.
The air-fuel mixture ejector 154 attached to the above apparatus is the same as the air-fuel mixture ejector used in Comparative Example 1 shown in FIG. The aqueous solution exiting the gas-liquid mixing / dissolving device 151 is introduced into the air-fueled ejector 154 attached to the tip of the supply pipe 152 at the bottom of the aerobic aeration device 153, and is sucked negative pressure generated by the discharge pressure. Low oxygen water is sucked from the liquid phase inlet 155, mixed with the aqueous solution and stirred to increase the dissolved oxygen concentration and discharged. The wastewater treatment can be performed by increasing the dissolved oxygen concentration and activating the aerobic bacteria with the injection amount of the aqueous solution as small as possible relative to the wastewater treatment amount and decomposing sludge with ozone in the aqueous solution.
Table 14 shows the relative growth rate of aerobic bacteria by increasing the dissolved oxygen concentration.

As shown in FIG. 14, an aqueous solution was produced by the gas-liquid mixing and dissolving device 161 in the same procedure as in Example 1. By injecting the aqueous solution exiting the gas-liquid mixing and dissolving device 161 into the waste water in the sewer pipe 163 through the supply pipe 162, the dissolved oxygen concentration in the low oxygen waste water can be reduced with the injection amount of the aqueous solution as small as possible relative to the waste water amount. It was possible to prevent the generation of hydrogen sulfide and to prevent the sewer pipe from corroding by decomposing sludge with ozone in the aqueous solution.
Table 15 shows the results of increasing the dissolved oxygen concentration when the aqueous solution was mixed and stirred in water (dissolved oxygen concentration 0.1 mg / L) close to the oxygen-free state of the sewage.

The treatment method using the aqueous solution of the present invention is not limited in use. For example, it can be used as a means to increase the dissolved oxygen concentration in the bottom and middle layers of closed water areas such as reservoirs, and it can also be used for dissolved oxygen concentration management and sterilization during fish farming and fish transportation, as well as in summer, when the water temperature rises and the red tide It can also be used as an emergency measure to reduce dissolved oxygen due to generation. Moreover, the deodorizing effect by ozone is also expectable by processing with aqueous solution.
Aqueous solutions containing nano-sized bubbles have an activating effect and can be applied to agriculture and fisheries. I can expect.
By manufacturing as a solution containing bubbles in the nano region, the amount of gas can be greatly reduced compared to conventional dissolution methods with large bubble particle size, and a highly concentrated supersaturated dissolved gas solution can be manufactured. As a result, the equipment becomes compact and the cost can be reduced by reducing gas.

It is a block diagram which shows typically Example 1 of the gas-liquid mixing dissolution apparatus which manufactures the aqueous solution of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural diagram of gas-liquid mixing and dissolving means constituting Example 1 of a gas-liquid mixing and dissolving apparatus for producing an aqueous solution of the present invention. It is a block diagram of the bubble classification recycling means which comprises Example 1 of the gas-liquid mixing dissolution apparatus which manufactures the aqueous solution of this invention. It is a structural diagram of the air-fueled ejector when the aqueous solution of the present invention is used for water treatment. It is a block diagram which shows typically the comparative example 1 of the melt | dissolution apparatus by an ejector system. It is a block diagram which shows typically the comparative example 2 of the melt | dissolution apparatus using a porous material. It is a block diagram which shows typically Example 3 which utilizes the aqueous solution of this invention for disinfection. It is a block diagram which shows typically Example 4 which utilizes the aqueous solution of this invention for disinfection. It is a block diagram which shows typically Example 5 which sprays the aqueous solution of this invention, and utilizes it for disinfection. It is a block diagram which shows typically Example 6 which makes the aqueous solution of this invention ice-like, and utilizes it for disinfection. It is a block diagram which shows typically Example 7 which utilizes the aqueous solution of this invention for water treatment. It is a block diagram which shows typically Example 8 which utilizes the aqueous solution of this invention for water treatment. It is a block diagram which shows typically Example 9 which utilizes the aqueous solution of this invention for wastewater treatment. It is a block diagram which shows typically Example 10 which utilizes the aqueous solution of this invention for the corrosion prevention of a sewer pipe.

Explanation of symbols

FIG.
DESCRIPTION OF SYMBOLS 101 Liquid phase supply means 102 Gas phase supply means 103 Ozone generator 104 Gas-liquid mixing and dissolving means 105 Pump 106 Gas-liquid mixing and dissolving means 107 Classification means 108 Gas vent valve 109 Recycling means 110 Gas-liquid mixing and dissolving means 111 Circulating water tank 112 Cooling device 113 Water treatment equipment

FIG.
201 Fluororesin pipe slit film 201a Pipe end face blind 202 External metal fitting 203 Internal metal fitting 204 Storage container 205 Gas-liquid inlet

FIG.
301 Wedge wire screen 302 Storage container 303 Gas vent valve 304 Recycle piping

FIG.
401 Main Body 402 Current Condensing Portion 403 Rectifying Portion 404 Supply Port 405 Gas Phase Suction Port 406 Liquid Phase Suction Port 407 Discharge Port

FIG.
501 Liquid phase supply means 502 Gas phase supply means 503 Ozone generator 504 Pump 505 Supply pipe 506 Mixed gas ejector 507 Gas phase suction port 508 Liquid phase suction port 509 Circulating water tank

FIG.
601 Liquid phase supply means 602 Gas phase supply means 603 Ozone generator 604 Pump 605 Supply pipe 606 Porous material 607 Circulating water tank

FIG.
701 Gas-liquid mixing and dissolution apparatus 702 Supply pipe 703 Sterilization tank 704 Ultrasonic treatment apparatus 705 Food

FIG.
801 Gas-liquid mixing and dissolving device 802 Supply pipe 803 Food processing device 804 Food

FIG.
901 Gas-liquid mixing and dissolving device 902 Supply pipe 903 Ultrasonic sprayer or spray generator 904 Food sterilizer 905 Food

FIG.
121 Gas-liquid mixing and dissolving device 122 Supply pipe 123 Ice making device 124 Food

FIG.
131 Gas-Liquid Mixing and Dissolving Device 132 Supply Pipe 133 Air-Gas Ejector 134 Liquid-phase Suction Port 135 Upper Water Area 136 such as Closed Water Area Middle Water Area 137 such as Closed Water Area Bottom Water Area such as Closed Water Area

FIG.
141 Gas / Liquid Mixing and Dissolving Device 142 Supply Pipe 143 Air / Gas Ejector 144 Air Inlet 145 Gas Phase Suction Port 146 Liquid Phase Suction Port 147 Closed Water Area and Other Upper Water Areas 148 Closed Water Area and Other Middle Water Areas 149 Closed Water Area and Bottom Water Areas

FIG.
151 Gas-Liquid Mixing and Dissolving Device 152 Supply Pipe 153 Aerobic Aeration Device 154 Air-Gas Ejector 155 Liquid Phase Suction Port

FIG.
161 Gas-liquid mixing and dissolving device 162 Supply pipe 163 Sewer pipe

Claims (9)

Method for producing an aqueous solution of supersaturated dissolved oxygen with dissolved ozone and saturation concentration more than 3 times by a gas-liquid mixing and dissolving device combining gas-liquid mixing and dissolving means with a linear slit in a fluororesin pipe and classification recycling means Disinfecting aqueous solution characterized in that dissolved ozone is an aqueous solution of 0.1 mg / L or more and a supersaturated dissolved oxygen of 3 or more times the saturated concentration A sterilizing method for contacting foods, daily necessities, cosmetics, pharmaceuticals and related devices, comprising the aqueous solution according to claim 2 A method for sterilizing foods, daily necessities, cosmetics, pharmaceuticals, and related equipment, characterized by performing ultrasonic treatment after treatment with the aqueous solution according to claim 2 or simultaneously with treatment. A sterilization method comprising contacting the food, daily necessities, cosmetics, pharmaceuticals, and related devices with the aqueous solution according to claim 2 in a sprayed state using an ultrasonic sprayer or other spray generating means A sterilization method comprising bringing the aqueous solution according to claim 2 into an ice or sherbet state with an ice making device and bringing it into contact with food. A method for purifying water, characterized in that the aqueous solution according to claim 2 is supplied to anoxic and low oxygen water areas such as closed water areas. A method for decomposing wastewater sludge, comprising supplying the aqueous solution according to claim 2 into a low-oxygen wastewater solution such as a wastewater treatment device. A method for preventing corrosion of a sewer pipe, characterized in that the aqueous solution according to claim 2 is supplied into the sewer pipe.