WO2017047796A1

WO2017047796A1 - Method for producing water that contains ultra-fine bubbles, apparatus for producing water that contains ultra-fine bubbles, and method for extracting food and beverage components

Info

Publication number: WO2017047796A1
Application number: PCT/JP2016/077563
Authority: WO
Inventors: 敏勝鈴木
Original assignee: 株式会社ピーシーエス
Priority date: 2015-09-18
Filing date: 2016-09-16
Publication date: 2017-03-23

Abstract

An apparatus 10 for producing water that contains ultra-fine bubbles has: a pressurized water supply system 50 for pressurizing water that contains ultra-fine bubbles produced by suctioning in air from an ejection port 28 using the low pressure that accompanies a current of water jetted from a nozzle 30; and a device 60 for separating out water that contains bubbles, the device 60 comprising a storage-type pressurized-water tank. The device 60 for separating water that contains bubbles has: a pressurized-water inflow port 61 for pumping the pressurized water to an upper part within the tank as a downward swirling flow and allowing the pressurized water to flow into said port 61; a central-part water discharge port 63 for continuously discharging, from the upper end of the tank, water in the central portion of the swirling flow that includes large bubbles collected in the center of the swirling flow; and a pressurized-water outlet port 62 for letting out, from the lower part of the tank, water that contains ultra-fine bubbles after the water that contains large bubbles is separated out. The apparatus 10 for producing water that contains ultra-fine bubbles is configured so as to obtain the water that contains ultra-fine bubbles from the pressurized-water outlet port 62.

Description

Ultrafine bubble-containing water production method, ultrafine bubble-containing water production apparatus, and water extraction method for food and drink ingredients

The present invention relates to a method for producing water containing ultrafine bubbles, an apparatus for producing water containing ultrafine bubbles, and a method for extracting edible fats and oils such as tea, coffee, cacao butter, soybean oil and corn oil using the water containing ultrafine bubbles. About.

Tea, such as green tea, is used for drinking after roasting by extracting tea ingredients with hot water or water. Black tea and oolong tea are extracted with hot water or water after fermentation and used for drinking.

Furthermore, coffee is extracted with hot water after roasting, cacao beans are extracted with cacao butter with a press after roasting, and soy oil as edible oil is extracted from soybeans and corn by a pressing method or extraction method, Corn oil has been extracted.

Patent Document 1 discloses a method of performing an extraction treatment with an aqueous solution of an enzyme having tannin decomposing activity.

In the extraction of tea and coffee, more components can be extracted using hot water than water. Moreover, in the case of edible fats and oils, a pressing method and an extraction method are used, and extraction by the pressing method is low in efficiency, so that it becomes expensive as a product. In addition, the extraction method uses an organic solvent that dissolves oil well and extracts edible fats and oils with high heat. Therefore, the fats and oils increase trans fatty acids that are considered to cause obesity.

Also, when hot water is used to extract tea or coffee, there is a problem that the taste of the extract falls when the hot water is cooled.

On the other hand, as a tea extraction method, there is a method of extracting tea umami components using ice water, but the extraction efficiency is very low, and therefore the extraction water becomes very expensive. There is a point.

Japanese Patent Laid-Open No. 2015-130841

The present invention has been made in view of the above-described conventional problems, and includes a method for producing ultrafine bubble-containing water containing very fine ultrafine bubbles, an ultrafine bubble-containing water production apparatus, It is an object of the present invention to provide a method capable of extracting tea, coffee, and edible fats and oils at room temperature or ice water temperature using water containing ultrafine bubbles.

As a result of diligent research, the present inventor has completed a method and an apparatus for continuously producing a large amount of ultrafine bubble-containing water containing ultrafine bubbles having a size of less than 30 nm and a size of 3 mm or more.

It was also found that tea or coffee can be extracted, cacao butter from cocoa beans, edible oil from soybeans and corn, etc. using water containing ultrafine bubbles at room temperature or ice temperature. Furthermore, since fine particles and organic substances can be washed away, it has been found that fresh foods and substrates can be washed without using a detergent.

That is, the above-described problems can be solved by the following embodiments.

(1) A process of producing water containing fine bubbles by sucking gas from an ejector by negative pressure generated by a jet of water, or jetting fine bubbles into water, and a storage type after pressurizing the water containing fine bubbles Pumped as a downward swirling flow in the upper part of the pressurized water tank, large bubbles are gathered at the center of the swirling flow, and water in the central part of the swirling flow is continuously discharged from the upper end of the tank together with the large bubbles. And a step of discharging the ultrafine bubble-containing water from the lower part.

(2) It has a pressurized water supply system capable of supplying pressurized water containing fine bubbles and a bubble-containing water separator, and the bubble-containing water separator comprises a storage-type pressurized water tank having a circular cross section, and is provided at the top. A pressurized water inflow port through which fine bubble-containing water pumped from the pressurized water supply system flows, a pressurized water discharge port provided at a lower portion, a central water discharge port provided at an upper end, and a pressurized water inflow port. A swirling flow forming pipe that makes the inflowing pressurized water a downward swirling flow along the circumferential surface in the tank, and the central water discharge port is water in the central portion of the swirling flow in the accumulation-type pressurized water tank. The pressurized water discharge port is characterized in that the remaining pressurized water discharged from the central water discharge port can be discharged as ultrafine bubble-containing water. Ultrafine bubble-containing water production apparatus.
By the above method or apparatus, ultrafine bubble-containing water can be produced in a large amount at a low cost and at a high speed.

(3) A step of producing water containing fine bubbles by ejecting water from a nozzle and sucking gas from an ejector by negative pressure generated by the jet, or jetting fine bubbles into water; After pressurization, it is pumped as a downward swirling flow to the upper part of the accumulation type pressurized water tank, large bubbles are gathered at the center of the swirling flow, and the water in the central portion of the swirling flow is continuously from the upper end of the tank together with the large bubbles. And discharging the ultrafine bubble-containing water from the lower portion of the tank, storing the ultrafine bubble-containing water discharged from the lower portion of the tank in the stirring tank, and storing the stored ultrafine bubbles The step of stirring the contained water and the substance to be extracted for a certain period of time, and after the stirring for the certain period of time, discharge the ultrafine bubble-containing water together with the substance to be extracted to remove the substance to be extracted Water extraction method of dietary components consisting comprises a degree, the.

When water containing ultrafine bubbles is stirred, ultrafine bubbles enter from the surface of the extract, for example, roasted coffee beans, adhere to ultrafine particles of the active ingredient on the surface and inside, and are discharged to the outside. As a result, they are extracted with water or float as they are.

The fine particles to which the ultrafine bubbles are attached become floating separations and float on the liquid surface, and the remaining extractables are precipitated as precipitation separations at the bottom of the liquid storage part. In addition, the fine particles to which bubbles larger than the ultrafine bubbles are attached try to settle while the bubbles are ruptured, but the ultrafine bubbles are attached and floated.

In addition, for example, when water containing ultrafine bubbles containing ultrafine bubbles having a size of less than 30 nm or 3 mm or more is mixed and stirred with soybeans, corn, etc. containing organic matter, the organic matter adheres to the bubbles. Then, it enters into soybeans and the like to attach ultrafine bubbles, and can float and separate from the adherend by its buoyancy.

According to the present invention, there is an effect that a large amount of water containing ultrafine bubbles can be produced at high speed. In addition, it can extract almost all active ingredients from tea leaves, coffee beans, soybeans, corn nuts, corn beans, etc. in a short time with ultra-fine bubble-containing water in the state of room temperature water or ice water without using a solvent. It has the effect of being able to.

The block diagram which shows the green tea cold-water extraction apparatus which concerns on Example 1 of this invention. The front view which shows the ultrafine bubble containing water manufacturing apparatus used for the Example 1 The front view which made the cross section expanded and shows the air-water mixing part in the apparatus Sectional drawing which expands and schematically shows the nozzle in the same-air mixing unit Side view showing a swirl flow forming device comprising fixed blades attached to the nozzle The front view made into the partial cross section which shows the bubble containing liquid separation apparatus which comprises a part of ultra fine bubble containing water manufacturing apparatus based on the Example Sectional view taken along line VII-VII in FIG. The flowchart which shows the other example of the ultrafine bubble presence confirmation method in an Example Pipeline diagram showing another form of water production apparatus containing ultrafine bubbles The block diagram which shows the edible oil-water extraction apparatus which concerns on Example 2 of this invention.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the green tea cold water extraction apparatus 1 according to the first embodiment includes an ultrafine bubble-containing water production apparatus 10 for water extraction, a green tea cold water stirring apparatus 80, a filter 90, and a cold water extraction tea container. 92.

The ultrafine bubble-containing water production apparatus 10 continuously produces a large amount of ultrafine bubble-containing water containing ultrafine bubbles having a size of less than 30 nm and a size of 3 mm or more.

In the green tea cold water stirring device 80, the ultrafine bubble-containing water produced by the ultrafine bubble-containing water production device 10 is pressurized and allowed to flow into the stirring tank 82 in which the ultrafine air-packed water is stored. The cold water is circulated in the tank 82.

In the stirring tank 82, a circulation device 83 for circulating water containing ultrafine bubbles and tea leaves is provided.

The circulation device 83 includes a swirl discharge pipe 83A, a swirl flow guide 83B, and a gap 83C. The swirl discharge pipe 83A is provided to protrude from an end portion (left end portion in the figure) in the agitation tank 82, and has a tip opening as an inflow port 84A. The mixed water of tea leaves and water containing ultrafine bubbles is inclined upward. Further, it is shaped like a curved pipe to be ejected to the inside of the agitating tank 82 and further ejected as a swirling flow into the stirring tank 82 by a fixed fin.

The swirling flow guide 83B surrounds the swirling discharge pipe 83A, and is a cylindrical body that opens obliquely upward and guides the swirling flow discharged therefrom, and is ejected from the inflow port 84A. It arrange | positions so that the performed swirl | flow may be guided diagonally forward. The gap 83C is provided between the lower end opening of the swirling discharge pipe 83A and the bottom of the stirring tank 82, and the swirling flow circulating in the stirring tank 82 flows into the swirling discharge pipe 83A from the lower end opening. .

The green tea cold water extraction device 1 is a batch process, and in the case of cold water, a maximum amount of green tea that has been charged is stirred for a maximum of 5 minutes to extract active ingredients from the green tea. After one batch is completed, the cold water containing green tea in the tank is filtered through the filter 90 to remove the tea leaves after extraction, and the cold water containing the extracted components is stored in the cold water extraction tea container 92, from which the bottle The product is subdivided into products.

Next, the ultrafine bubble-containing water production apparatus 10 for water extraction will be described in detail with reference to FIGS.

As shown in FIGS. 2 to 7, the ultrafine bubble-containing water production apparatus 10 includes an air / water mixing unit 20, a nozzle 30 (see FIG. 3) provided in the air / water mixing unit 20, a swirling flow, and the like. A forming apparatus 40 (see FIGS. 4 and 5), a pressurized water supply system 50, and a bubble-containing water separator 60 (see FIGS. 6 and 7) are configured.

As shown in FIG. 3, the air-water mixing unit 20 includes a water flow path 22 through which water can flow, a water inflow port 24 provided at one end (right end in FIG. 3), and the other end of the water flow path 22. Gas can flow into the water flow path 22 from the side (upper side in FIG. 3) at the position between the discharge port 26 of the bubble-containing water provided at (the left end in FIG. 3) and the inflow port 24 and the discharge port 26. And an ejection port 28 formed in the above.

From the inflow port 24, the nozzle 30 for water ejection is provided which protrudes into the water flow path 22 and whose tip 30A is opened at the position of the ejection port 28.

Inside the nozzle 30, as shown in enlarged views in FIGS. 4 and 5, the swirl flow forming device 40 including four stationary blades 42 in the circumferential direction is provided from the base end 30 </ b> B of the nozzle 30 to the nozzle 30. It is inserted and fixed inside.

Here, the water swirled by the swirl flow forming device 40 when flowing through the nozzle 30 is jetted from the tip 30A in a swirl flow, but the position of the tip 30A of the nozzle 30 is from the tip 30A. The discharge flow of the gas sucked out from the ejection port 28 by the negative pressure formed by the previous swirl flow is determined so as to flow into the swirl flow. In this embodiment, the gas is N ₂ gas so that the extracted component is not oxidized.

Here, when N ₂ gas is formed from liquid nitrogen, it is convenient to cool the water by the cold heat to make cold water.

The nozzle 30 includes a gas guide device 44 configured by a cylindrical guide that surrounds the tip 30A at an interval.

The gas guide device 44 is configured to guide the discharge flow of the gas sucked into the water flow path 22 from the ejection port 28 so as to flow into the swirling flow of water ejected from the tip 30 </ b> A of the nozzle 30.

More specifically, the nozzle 30 has a tapered shape, the gas guide device 44 has a tapered inner peripheral surface 44A that tapers in the direction of water ejection, and an axial intermediate portion of the tapered inner peripheral surface 44A is provided. The nozzle 30 is attached to the nozzle 30 by screws (not shown) so as to be positioned at the tip 30A of the nozzle 30.

As shown in FIG. 2, an inflow pipe 52 is connected to the inflow port 24 of the air / water mixing unit 20 by screwing. Further, a discharge pipe 54 is connected to the discharge port 26 by screwing in the same manner as the inflow pipe 52. Further, the gas introduction pipe 28A is also connected to the ejection port 28 by screwing. A gas introduction amount control valve 28B is provided in the middle of the gas introduction pipe 28A.

The pressurized water supply system 50 is connected to an inflow pipe 52 and a discharge pipe 54, a pressurizing pump 56 capable of supplying pressurized water containing fine bubbles to the inflow pipe 52, and a suction side of the pressurizing pump 56, and gas is mixed. A raw water supply pipe 57 that supplies water to be supplied and a pressure feed pipe 58 that is connected to the discharge side of the pressure pump 56 and delivers pressurized water.

An inflow pipe 52 is connected in the middle of the pumping pipe 58, a discharge pipe 54 is connected to the raw water supply pipe 57, and a part of the ultrafine bubble-containing water formed in the air / water mixing unit 20 is discharged to the discharge pipe 54. , The raw water supply pipe 57, the pressure pump 56, the pressure feed pipe 58, and the inflow pipe 52 are configured to return to the inflow port 24 of the air / water mixing unit 20. Reference numeral 56 </ b> A in FIG. 2 indicates a motor for driving the pressurizing pump 56.

The pressure feed pipe 58 of the pressurized water supply system 50 is connected to the bubble-containing water separation device 60 shown in FIGS. 6 and 7 so as to supply water containing ultrafine bubbles in a pressurized state.

The bubble-containing water separation device 60 is composed of a storage-type pressurized water tank having a circular cross section, and is provided on the upper side surface of the tank, and a pressurized water inflow port 61 into which ultrafine bubble-containing water pumped through a pressure feed pipe 58 flows in, The pressurized water discharge port 62 provided on the side surface, the central water discharge port 63 provided at the upper end of the tank, and the pressurized water inflow port 61 are provided on the inner side of the pressurized water. And a swirl flow forming pipe 64.

As shown in FIG. 7, the swirling flow forming pipe 64 is configured to supply pressurized ultrafine bubble-containing water flowing in the radial direction from the pressurized water inflow port 61 in the circular tank cross section to the inner peripheral surface of the circular cross section tank. The pressure water is guided in a counterclockwise direction and a spiral flow that is slightly obliquely downward.

Water flowing in from the pressurized water inflow port 61 is discharged out of the tank from a pressurized water discharge port 62 and a central water discharge port 63 provided on the lower side surface of the tank, and each discharge amount is in the vicinity of the central water discharge port 63. It is controlled by the provided discharge amount control valve 65.

The pressurized water flowing into the tank is turned into a swirl flow by the swirl flow forming pipe 64, but the central water discharge port 63 is provided at the center position of the upper end surface of the tank. Water is discharged from the central water discharge port 63, and water in the outer portion of the swirling flow is discharged from the pressurized water discharge port 62.

Since the water in the tank is swirled, the part with a relatively large specific gravity including ultrafine bubbles is outside the swirl, and the water containing the bubbles larger than this has a relatively small specific gravity and collects in the central part of the swirling flow. The portion of the water flowing into the tank that contains relatively large bubbles is discharged from the central water discharge port 63, and the remaining water is discharged from the pressurized water discharge port 62 in a state that contains more ultrafine bubbles. . This reduces the chance that the fine bubbles come into contact with the large bubbles and makes them difficult to break.

Next, the process of producing ultrafine bubble-containing water by the ultrafine bubble-containing water production apparatus 10 will be described.

First, the raw water to be mixed with gas is sucked from the raw water supply pipe 57 by the pressurizing pump 56, and is pressurized and sent out from the pressure feeding pipe 58.

A part of the water in the pressure feeding pipe 58 reaches the air / water mixing section 20 through the inflow pipe 52 and the inflow port 24. The remainder reaches the pressurized water inflow port 61 of the bubble-containing water separator 60.

The water flowing in from the inflow port 24 of the air / water mixing unit 20 remains swirled by the swirl flow forming device 40 provided at the base end 30B of the nozzle 30 and enters the water flow path 22 from the tip 30A of the nozzle 30. Erupted. In a steady state after a lapse of a certain time from the ejection, the pressure in the air / water mixing unit 20 is set higher than the external pressure, for example, 2.5 to 6.0 kg / cm ² .

Since the ejected water has a large velocity component of the swirl flow in addition to the velocity in the direction of flow in the water flow path 22, the negative pressure applied to the ejection port 28 is compared with the case of flowing water in a normal linear shape. Therefore, the gas can be reliably discharged from the ejection port 28 even when the pressure in the air / water mixing section 20 is higher than the external pressure.

The spiral flow of water ejected from the tip 30A of the nozzle 30 entrains water in the water flow path 22 and gas from the ejection port 28 to form a spiral flow.

The gas sucked from the ejection port 28 is entrained as a spiral flow along the taper outer peripheral surface 31 of the nozzle 30 and between the taper inner peripheral surface 44A of the gas guide device 44 and is ejected from the nozzle 30 here. It is strongly mixed in the spiral flow of water.

That is, instantaneous intense mixing and dispersion, such as a spiral flow of water and a spiral flow of gas, and a gas dissolution occur.

In the process, cavitation is repeatedly generated and destroyed in the spiral flow mixed with gas, and each time the bubbles formed by the gas are broken into small pieces, the size of which is almost 100 nm or less, 30 nm or less, and further 10 to 3 mm. It becomes a super fine bubble.

The water containing ultrafine bubbles passes through the discharge port 26 and the discharge pipe 54 of the air / water mixing unit 20 and reaches the raw water supply pipe 57, from which it is sucked and pressurized by the pressure pump 56, and the pressure feed pipe. 58. In the same way as described above, a part of the pressurized water sent out is supplied to the gas-water mixing unit 20 and the generation and destruction of bubbles due to cavitation is repeated, and the remaining large bubbles are also made into smaller ultrafine bubbles. .

In the ultrafine bubble-containing water, the size of the contained bubbles is almost 100 nm or less, but the ratio of 30 nm or less is increased by passing the air-water mixing unit 20 a plurality of times. Moreover, although not all of the bubbles, bubbles of less than 10 mm and 3 mm or more could be confirmed. For example, the measurement can be performed as follows using an artificial zeolite whose void size is previously designed to be 3 mm or more.

After adsorbing magnesium and cesium cations on artificial zeolites with pore sizes of 3mm, 4mm, 5mm, 7mm and 10mm respectively, this is repeatedly washed with pure water, and the amount of cations eluted from the filtrate is constant. At that stage, it was confirmed that magnesium and cesium cations were remarkably eluted when mixed and stirred with water containing ultrafine bubbles.

In addition, zeolite with magnesium and cesium cations entering the voids sinks in the water as it is, but it has been confirmed that the artificial zeolite has a reduced specific gravity when brought into contact with water containing ultrafine bubbles. In combination with the remarkable elution of the magnesium and cesium cations, it can be estimated that the ultrafine bubbles discharged and entered the magnesium and cesium cations in the voids of the artificial zeolite. It should be noted that bubbles larger than the size of the voids in the zeolite cannot enter the voids.

By repeating the same method as described above, the present inventor was able to confirm that there were bubbles having a size of less than 10 to 3 mm in the produced ultrafine bubble-containing water.

Here, it was confirmed that the ultrafine bubbles were mixed with water when the size was less than 10 mm, and when the size was less than 10 mm, the wavelength of the visible light was not exceeded, and transparent ultrafine bubbles could not be visually confirmed. The above phenomenon was caused when the fine pores and the pore diameter of the artificial zeolite were 10 mm or less, and this was considered to be less than 10 mm. It should be noted that the ultrafine bubbles are assumed to have a size of 30 nm or less, which has been considered impossible to measure in the past.

According to the experiment using gas as air, ultrafine bubbles containing bubbles having a size of less than 10 mm, which could not be confirmed by visual observation, were discharged from the outlet of the pressure feed tube 58 from 600 t / day to 1250 t of ultrafine bubble-containing water. The amount of water per day could be dissolved at a rate of 15 to 20 liters / minute. Gas and were similar case of the N _2.

In the above embodiment, the air-water mixing unit 20 is used in which the swirling flow of water is applied to the ejector to suck out the gas. However, a general ejector having a structure in which the flow of straight water is simply applied to the port. Even so, since ultrafine bubbles are generated slightly, the above-described bubble-containing water separation device 60 is used to sort out the ultrafine bubbles over time, or the bubble-containing water separation devices 60 are provided in multiple stages. If selected, water with a high content of ultrafine bubbles can be produced.

The ultrafine bubble-containing water is supplied to the pressurized water inflow port 61 of the bubble-containing water separator 60 via the pressure feed pipe 58.

The pressurized water supplied from the pressurized water inflow port 61 is always filled in the tank-shaped bubble-containing water separator 60 and discharged from the central water discharge port 63 and the pressurized water discharge port 62 to the outside as much as the inflow amount of the pressurized water. The

The pressurized water supplied from the pressure feed pipe 58 via the pressurized water inflow port 61 into the pressurized water filled in the bubble-containing water separator 60 is contained in a tank constituting the bubble-containing water separator 60 by the swirl flow forming pipe 64. It flows into the tank as an obliquely downward swirling flow along the peripheral surface.

As a result, a large downward and counterclockwise swirl flow is formed in the tank, and water having a relatively low specific gravity including relatively large bubbles gathers at the center thereof, and a portion along the inner peripheral surface of the tank is relatively Ultrafine bubble-containing water containing small ultrafine bubbles and having a large specific gravity gathers, the former being discharged from the central water discharge port 63 and the latter being discharged from the pressurized water discharge port 62.

It is known as a physical property that the smaller the size of the fine bubbles, the slower the ascending speed becomes. As a result of the separation of the large bubbles and the small fine bubbles by this swirling flow mechanism, the ultrafine bubbles are contained in the swirling flow. The water with the increased ratio flows out from the pressurized water discharge port 62. The relatively large bubbles are separated from the ultrafine bubble group by the centrifugal force during swirling and rise, gather near the center of the upper part of the tank, and are efficiently discharged.

The relatively large bubbles that were separated were about 5% of the total amount of bubbles added with ultrafine bubbles, but almost all of them could be separated and removed.

Therefore, in the ultrafine bubble-containing water discharged from the pressurized water discharge port 62, the abundance of fine bubbles of 100 nm or less or 30 nm or less, 10 cm or more is small, and the content ratio of ultrafine bubbles having a size of 10 cm or less is large. Become.

By the above mechanism of action, the ultrafine bubbles are not lost together with the relatively large microbubbles having a size of 10 mm or more, and the unique function of the ultrafine bubbles can be exhibited in the subsequent stage. become able to.

Also, the presence of ultrafine bubbles could be confirmed in the following manner.
I Materials and equipment material;
(1) Test water: Pure water that has been cooled after boiling (water without dissolved air)
(2) Artificial zeolite: 1.5 g having pores with a size of less than 1 nm
(3) of 1000 mg / l _{C S} aqueous solution 600ml
2. apparatus;
(1) Stirring device (4 units)
(2) Ultra-fine bubble pressurized water production device (3) Air bubble generator for ornamental fish tank (4) Dissolved oxygen (DO) measuring device (dissolved oxygen meter)
(5) Atomic Absorbance Meter II for Cs ion detection Procedure 1. 1.5 g of artificial zeolite is put into 600 ml of a 1000 mg / l Cs aqueous solution and stirred with a stirrer (one unit) to adsorb Cs fine particles on the zeolite.
2. The zeolite adsorbed with the Cs fine particles is thoroughly washed with test water.
(Washing is performed with a stirrer until no Cs ions are detected from the washing water by atomic absorption analysis of Cs ions.)
3. After washing, the zeolite is filtered out and drained. Divide into 3 equal parts after draining.
4). The following three types of sample water are prepared.
(1) Ultrafine bubble-containing water is prepared by adding ultrafine bubbles to test water using an ultrafine bubble pressurized water production apparatus. 100 ml of them are collected as No. 1 sample water.
(2) Bubble-containing water obtained by adding air bubbles to test water is produced by an air bubble generator for an ornamental fish tank. 100 ml of them are collected as No. 2 sample water.
(3) Collect 100 ml as it is without adding air bubbles to the test water and use it as No. 3 sample water.
(Note) In (1) and (2), bubbles are added for sufficient time.
5. Measure the DO of sample Nos. 1 to 3 with a dissolved oxygen meter.
6.4. (1) Leave in the water of (2) for a certain period of time until no bubbles can be visually confirmed.
7). Again, measure DO of sample Nos. 1-3 with a dissolved oxygen meter.
As a result, it can be seen that more oxygen is dissolved in the No. 1 sample water.
8. Inject No. 1-3 sample water into separate stirrers, An equal amount of the zeolite drained in (1) is added, each DO is measured with a dissolved oxygen meter, and the Cs ion concentration is measured with an atomic absorption meter.
9. After stirring for a certain time, DO of each sample water filtered from zeolite is measured with a dissolved oxygen meter, and a Cs ion concentration is measured with an atomic absorption meter.

It can be seen that in the No. 1 sample water, more oxygen was transferred to the zeolite, and Cs ions flowed out of the zeolite.

Fig. 8 shows a flowchart of the above confirmation procedure.

In the above, the air / water mixing unit 20 is configured such that the water containing ultrafine bubbles is repeatedly circulated, but the present invention is not limited to this, and the air / water mixing unit 20 is finally super The configuration may be such that, before the formation of the fine bubbles, the air / water mixing unit 20 is supplied in a state of water containing fine bubbles containing at least slightly larger bubbles than the ultrafine bubbles.

For example, as in the ultrafine bubble-containing water production apparatus 11 shown in FIG. 9, a first air / water mixing unit 70 corresponding to the air / water mixing unit 20 and fine bubbles in the first air / water mixing unit 70. It is necessary to provide the second air / water mixing unit 72 corresponding to the air / water mixing unit 20 for supplying the contained water in a two-stage configuration and to circulate the ultrafine bubble-containing water from the first air / water mixing unit 70. Try not to have it.

In the present invention, the air / water mixing section may inject fine bubbles into water to form fine bubble-containing water without using an ejector.

In this case, a first pressure pump 74 that supplies fine bubble-containing water to the first air / water mixing unit 70 and a second pressure pump that pressurizes and supplies raw water to the second air / water mixing unit 72. 76.

In the green tea cold water extraction apparatus 1 according to the first embodiment, green tea is poured into the ultrafine bubble-containing water stored in the stirring tank 82, and the ultrafine bubble-containing water is repeatedly brought into contact with the surface of the green tea by the flow of pressurized water.

Components adhering to the surface and cracks of green tea, such as organic fine particles such as catechin, are separated by the entry of ultrafine bubbles between this and the extract, and the ultrafine bubbles adhere and float. The

The process of organic fine particles adhering to the surface of ultrafine bubbles can be said to be dynamic extraction that is close to the adsorption phenomenon by chemical sorption due to the high surface activity of the ultrafine bubbles and is attracted to the surface. Since the surface activity increases as the diameter of the ultrafine bubbles decreases, sufficient sorption is possible even with a slight contact time between the ultrafine bubbles and the organic fine particles.

大きい Large bubbles may be attached to the extract or fine particles and float, but the bubbles burst during the ascent and lose buoyancy. Ultrafine bubbles again adhere to these, but there is no buoyancy to lift the object to be cleaned, and only fine particles are lifted.

Although the green tea cold water extraction device 1 according to the first embodiment performs batch processing on the extract, the present invention is not limited to this, and may be continuously processed.

Since organic matter adheres to bubbles, if this bubble is ultrafine, the chance of contact with tea leaves becomes very large, and superfine bubbles are attached to most micro organic matter and floated and separated from tea leaves by their buoyancy. be able to. In the case of Example 1, the extractables include fermented black tea, fermented oolong tea, roasted coffee beans and the like in addition to roasted green tea.

Hereinafter, the edible oil / water extraction apparatus 100 according to Example 2 of the present invention will be described.

This edible oil / water extraction apparatus 100 includes an ultrafine bubble-containing water production apparatus 10, an extract water agitator 110, and a filter 120, as in the green tea cold water extraction apparatus 1 according to the first embodiment. Further, an oil / water separator 130 is provided.

The oil / water separator 130 separates the water containing ultrafine bubbles, including the oil after the extractable substance is filtered by the filter 120, into edible oil and water based on the specific gravity difference. Only the oil separated above is collected separately from water and collected in the edible oil container 140. In addition, when there is oil in the inside of shells such as soybean, corn, sesame oil, etc., it is preferable to extract after squeezing the whole to destroy the shell.

Here, the to-be-extracted substance in Example 2 is the fruit containing the edible fats and oils, such as an oil palm pulp, roasted cocoa beans, soybeans, a corn nut, and a sesame seed, or a pulp.

The present invention is not limited to roasted green tea according to the above-mentioned examples, soybeans, and corn fruits, but generally edible oils that can be extracted by organic solvents or pressing. It is applicable to extraction, and can be used for extraction when an extract obtained by extracting an active ingredient from green tea, black tea, oolong tea, coffee beans or the like is used.

As another extract, the present inventor conducted an experiment of extracting and separating fish blood components (fish processing wash water) uniformly dispersed in fresh water and seawater.

Since blood components are transparently dispersed and dissolved, they cannot be separated by ordinary fine bubbles, but the surface activity of the ultrafine bubbles in the ultrafine bubble-containing water according to the present invention is increased in fresh water or seawater due to its surface activity. The dispersed fish blood components were successfully sorbed and separated. The results are shown in Table 1 below.

The temperature of the water in which the fish blood components are dispersed was about 8 ° C.

Also, fish discharge components are dispersed in normal river water, and if this component is rich, the odor may not be tolerated.

The present inventor treated the 15 ° C. river water pumped up as normal industrial water with water containing ultrafine bubbles, and as shown in Table 2 below.

In particular, when ultrafine bubbles are used, the trimethylamine odor becomes prominent on the water surface several minutes after the start of the treatment, and it can be visually observed that fine suspended substances are separated on the film (thin film) formed on the surface. It was.

As described above, the trimethylamine odor is a discharge component of fish, and usually has high solubility even in river water, and will not be separated naturally unless an operation such as extraction is performed. In addition, suspended matter is usually not visible. Ultrafine bubbles are extracted not only by suspended substances but also by components that are transparently dissolved in water by sorbing fish discharge components on the surface of the ultrafine bubbles because the surface has high chemical activity. I was able to separate.

The separated suspended matter can be used as feed.

The ultrafine bubble-containing water used for separation of these fish blood components and trimethylamine is produced by the ultrafine bubble-containing water production apparatus 10 described above.

Also, the components separated on the surface can be scooped or recovered from the surface current of the stirring tank.

The present invention is also applicable to a method for producing ultrafine bubble-containing water or an apparatus therefor. Further, the produced ultrafine bubble-containing water is used not only for extracting components such as tea leaves but also for fresh vegetables such as vegetables. It can be used to clean industrial products such as food and circuit boards without detergent.

The present invention has applicability to industries that produce a large amount of ultrafine bubble-containing water that can clean substrates and foods without detergent, and industries that use the water. It can also be used in businesses that extract cold tea by extracting tea components, organic components from coffee beans, and edible oils that are efficiently extracted from soybeans and corn at room temperature.

DESCRIPTION OF SYMBOLS 1 ... Green tea cold

water extraction apparatus

10, 11 ... Ultra fine bubble containing water manufacturing apparatus 20 ... Air-water mixing part 22 ... Water flow path 24 ... Inflow port 26 ... Discharge port 28 ... Ejection port 28A ... Gas introduction pipe 28B ... Gas introduction amount Control valve 30 ... Nozzle 30A ... Tip 30B ... Base end 40 ... Swirling flow forming device 42 ... Fixed blade 44 ... Gas guide device 44A ... Taper inner peripheral surface 50 ... Pressurized water supply system 52 ... Inflow pipe 54 ... Discharge pipe 56 ... Pressurization Pump 57 ... Raw water supply pipe 58 ... Pressure feed pipe 60 ... Bubble-containing water separator 61 ... Pressurized water inflow port 62 ... Pressurized water discharge port 63 ... Center water discharge port 64 ... Swirling flow forming pipe 65 ... Discharge control valve 70 ... First The second air-water mixing unit 74 ... the first pressurizing pump 76 ... the second pressurizing pump 80 ... the green tea cold water stirring device 82 ... the stirring tank 83 ... circulation Device 83A ... Swirling discharge pipe 83B ... Swirling flow guide 83C ... Gap 84A ...

Inlet

90, 120 ... Filter 92 ... Cold water extraction tea container 95 ... Permeable crushed stone roadbed 100 ... Edible oil / water extraction device 110 ... Extracted water agitator 130 ... Oil / water separator 140 ... Edible oil container

Claims

A process of producing water containing fine bubbles by sucking a gas from an ejector by a negative pressure generated by a jet of water, or jetting fine bubbles into water;
After pressurizing the water containing fine bubbles, it is pumped as a downward swirling flow into the upper part of the accumulation type pressurized water tank, large bubbles are gathered at the center of the swirling flow, and the water in the central portion of the swirling flow is collected as the large bubbles And a process of continuously discharging from the upper end of the tank and discharging water containing ultrafine bubbles from the lower part of the tank,
A method for producing water containing ultrafine bubbles.
A pressurized water supply system capable of supplying pressurized water containing fine bubbles;
An air-containing water separation device,
The bubble-containing water separator comprises a storage-type pressurized water tank having a circular cross section,
A pressurized water inflow port into which fine bubble-containing water pumped from the pressurized water supply system is provided;
A pressurized water discharge port provided at the bottom;
A central water discharge port provided at the upper end;
A swirl flow forming pipe that is provided in the pressurized water inflow port and causes the inflowing pressurized water to be a downward swirling flow along the circumferential surface of the tank;
With
The central water discharge port is capable of continuously discharging water in the central portion of the swirling flow in the accumulation-type pressurized water tank, and the pressurized water discharge port is the pressurized water discharged from the central water discharge port. An apparatus for producing ultrafine bubble-containing water, wherein the remaining pressurized water can be discharged as ultrafine bubble-containing water.
In claim 2,
A water flow path through which water can flow, a water inflow port provided at one end of the water flow path, a bubble-containing water discharge port provided at the other end, and a side position between the inflow port and the discharge port. An air-water mixing section having an ejection port formed so that gas can flow into the water flow path from
An inflow pipe connected to the inflow port;
The pressurized water supply system is connected to the discharge pipe connected to the discharge port, the suction side of the pressure pump, the raw water supply pipe for supplying the water, and the discharge side of the pressure pump. A pressure feeding pipe to send out,
An apparatus for producing water containing ultrafine bubbles, comprising:
In claim 3,
A nozzle for water ejection provided to protrude from the inflow port into the water flow path and having a tip opened at the position of the ejection port;
A swirl flow forming device provided inside the nozzle for turning swirl water from the tip to the nozzle; and
The nozzle is positioned so that a discharge flow of a gas sucked out of the ejection port by a negative pressure formed by the swirling flow of water flows into the swirling flow. Bubble-containing water production device.
In claim 4,
It has a gas guide device that is configured by a cylindrical guide that surrounds the tip of the nozzle with an interval, and guides the discharge flow of the gas sucked out from the ejection port so as to flow into the swirl flow. A water production apparatus containing ultrafine bubbles.
In claim 5,
The nozzle has a tapered shape, the gas guide device is a cylindrical guide having a tapered inner peripheral surface tapered in the direction of water ejection, and an axial intermediate portion of the tapered inner peripheral surface is An ultrafine-bubble-containing water production apparatus, which is disposed so as to be at the tip position of the nozzle.
In any one of Claims 3 thru | or 6.
The inflow pipe is connected to the pumping pipe so that pressurized water can flow, the discharge pipe is connected to the raw water supply pipe, and a part of the ultrafine bubble-containing water formed in the air-water mixing unit is discharged. An ultrafine bubble-containing water production apparatus configured to recirculate to the air / water mixing section through a pipe, the raw water supply pipe, the pressurizing pump, the pressure feeding pipe, and the inflow pipe.
A step of producing water containing fine bubbles by jetting water from a nozzle and sucking gas from an ejector by a negative pressure generated by the jet, or jetting fine bubbles into water; and
After pressurizing the water containing fine bubbles, it is pumped as a downward swirling flow into the upper part of the accumulation type pressurized water tank, large bubbles are gathered at the center of the swirling flow, and the water in the central portion of the swirling flow is collected as the large bubbles And a process of continuously discharging from the upper end of the tank and discharging water containing ultrafine bubbles from the lower part of the tank,
Storing the ultrafine bubble-containing water discharged from the lower part of the tank in a stirring tank;
A step of stirring the stored ultrafine bubble-containing water and the extract for a certain period of time;
After the stirring for a certain time, discharging the ultrafine bubble-containing water together with the extract, and removing the extract;
A method for extracting water from food and drink ingredients.
In claim 8,
The extract is one of roasted green tea, fermented black tea, fermented oolong tea, roasted coffee beans, oil palm pulp, roasted cocoa beans, soybeans, corn nuts, and sesame seeds. A method for extracting water from food and drink components.