KR100777957B1 - Water treatment method and water treatment device - Google Patents

Abstract

In this water treatment apparatus, in the micro nano bubble generation state confirmation tank 13, the turbidimeter 14 which is a detection part detects the generation state of the bubble in the micro nano bubble generation state confirmation tank 13 as turbidity of the to-be-processed water. The controller 11, which is a control unit, receives a signal indicating the turbidity detected by the turbidimeter 14, and interlocks and controls the opening degree of the air volume regulating valves 6A to 6D according to the signal, thereby automatically controlling the amount of air flowing through each regulating valve. To control. The degree of opening of the air flow regulating valves 6A to 6C and 6D is adjusted so that the signal indicating the turbidity indicates that the water to be treated in the confirmation tank 13 is turbid (that is, the turbidity is equal to or greater than a predetermined value). Interlock control.

Water treatment method, water treatment device, micro nano bubble generator

Description

WATER TREATMENT METHOD AND WATER TREATMENT APPARATUS}

BRIEF DESCRIPTION OF THE DRAWINGS The figure which shows typically 1st Embodiment of the water treatment apparatus of this invention.

Fig. 2 is a diagram schematically showing a second embodiment of the water treatment device of the present invention.

3 is a diagram schematically showing a third embodiment of the water treatment apparatus of the present invention.

4 is a diagram schematically showing a fourth embodiment of a water treatment apparatus of the present invention.

5 is a diagram schematically showing a fifth embodiment of the water treatment apparatus of the present invention.

Fig. 6 is a diagram schematically showing a sixth embodiment of the water treatment device of the present invention.

The figure which shows typically the 7th Embodiment of the water treatment apparatus of this invention.

8 is a diagram schematically showing an eighth embodiment of a water treatment device of the present invention.

9 is a diagram schematically illustrating a ninth embodiment of the water treatment device of the present invention.

The figure which shows typically the 10th Embodiment of the water treatment apparatus of this invention.

* Description of the symbols for the main parts of the drawings *

1: 1st bubble processing tank 2A-2C: submersible pump

3A, 3B: Header Piping 4A ~ 4C: Micro Nano Bubble Generator

5A to 5C: Air intake pipe 6A to 6C: Air flow control valve

7: Water flow 9: Bubble treatment tank pump

10: discharge piping 11: controller

12: Valve 13: micro nano bubble generation state check tank

14: turbidimeter 15: water treatment apparatus of the following process

16: biological treatment device 17: chemical treatment device

18: physical processing unit 19: deep biological treatment tank

20: lower inlet pipe 22: diffuser

23: Blower for Submerged Film Cleaning 24: Submerged Film

25: gravity pipe 26: agitation blower

27: polyvinylidene chloride filler

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water treatment method and a water treatment device. For example, the present invention relates to a water treatment method and a water treatment device that efficiently generate micro nanobubbles and utilize them for pretreatment of treated water. The present invention relates to a water treatment apparatus and a water treatment method capable of introducing efficiency-treated water containing bubbles into a water treatment apparatus after pretreatment to significantly increase the efficiency, thereby miniaturizing the overall water treatment apparatus and improving the quality of the treated water.

Conventionally, in the water treatment method and the water treatment apparatus, as a general pretreatment method and pretreatment apparatus, several methods and apparatus exist conventionally.

As an example, precipitation, filtration, pH adjustment, ozone oxidation, adsorption, etc. as a pretreatment apparatus of a biological treatment apparatus are mentioned.

The purpose of the pretreatment apparatus is to reduce the biological, chemical, or physical load on the water treatment apparatus in the next step, and to reduce the scale of the water treatment apparatus, to reduce the running cost, and to improve the water quality of the treated water from the water treatment apparatus. You can expect.

On the other hand, the method and apparatus of using the nanobubble as a prior art are described in Unexamined-Japanese-Patent No. 2004-121962.

This technique takes advantage of the characteristics of nanobubble such as reduced buoyancy, increased surface area, increased surface activity, the generation of local high-voltage fields, and the interfacial and bactericidal action by realizing electrostatic polarization. More specifically, Patent Document 1 discloses that various objects can be washed with high functions and low environmental loads by adsorption of contaminants, high-speed cleaning of object surfaces, and sterilization functions by correlating them. It is disclosed that can be carried out.

In addition, another conventional technique for producing nanobubbles is described in Japanese Laid-Open Patent Publication No. 2003-334548.

In Patent Document 2, in a liquid, (i) a step of decomposing and gasifying a part of the liquid, (ii) a step of applying ultrasonic waves in the liquid, or (iii) a step of decomposing and gasifying a part of the liquid and a step of applying an ultrasonic wave. It is disclosed that is composed of.

By the way, in the water treatment using micro nano bubbles, it is required to generate micro nano bubbles more efficiently and stably in water.

Then, the subject of this invention is providing the water treatment method and water treatment apparatus which can generate a micro nano bubble stably and efficiently, and can perform water treatment.

The invention is more fully understood by the following detailed description and the accompanying drawings, which are presented by way of illustration only and thus do not limit the invention.

In order to solve the above problems, the water treatment method of the present invention, the first step of introducing the water to be treated into a first bubble treatment tank having a first micro nano bubble generator; A second step of introducing the water to be treated from the first bubble treatment tank into a second bubble treatment tank having a second micro nanobubble generator to confirm the state of generation of bubbles in the second bubble treatment tank; And a third step of controlling the operations of the first and second micro nanobubble generators based on the result of confirming the bubble generation state in the second step.

According to the water treatment method of the present invention, in the second step, the operation of the first and second micro nanobubble generators is controlled in the third step based on the result of confirming the state of the bubble generation in the second bubble treatment tank. do. Therefore, in the 1st, 2nd bubble processing tank, it becomes possible to adjust and optimize the micro nano bubble generation state by a 1st, 2nd micro nano bubble generator. Therefore, the treatment efficiency of the to-be-processed water by a micro nano bubble can be improved. In addition, when at least a part of the rough wall (for example, side wall) of the said 2nd bubble processing tank is comprised with a transparent material, the bubble generation state (for example, micro nano bubble is generated in a tank) is produced. Will be visible to the naked eye.

Moreover, the water treatment apparatus of one Embodiment is the 1st bubble treatment tank which introduces to-be-processed water and has a 1st micro nano bubble generator; A second bubble treatment tank having a second micro-nano bubble generator and a detector for detecting a state of generation of bubbles while introducing the water to be treated from the first bubble treatment tank; And a control unit for controlling the operations of the first and second micro nano bubble generators based on the occurrence state of the bubble detected by the detection unit.

According to the water treatment apparatus of this embodiment, in the second bubble processing tank, the detection unit detects the generation state of the bubble in the second bubble processing tank, and the control unit generates the bubble state in the second bubble processing tank detected by the detection unit. Based on, control the operation of the first and second micro nano bubble generator. Thereby, it becomes possible to adjust and optimize the micro nano bubble generation state by a 1st, 2nd micro nano bubble generator, and to improve the processing efficiency of the to-be-processed water by a micro nano bubble.

Moreover, the water treatment apparatus of one Embodiment is the said water treatment apparatus WHEREIN: The 1st air suction piping connected to the said 1st micro nano bubble generator; A second air intake pipe connected to the second micro nano bubble generator; A first air flow control valve connected to the first air intake pipe; And a second air flow rate adjustment valve connected to the second air intake pipe, wherein the detection unit is a turbidity meter for detecting turbidity of the water to be treated in the second bubble treatment tank, and the control unit inputs the turbidimeter. Based on the signal indicating turbidity, the opening degree of the said 1st air flow regulating valve and the opening degree of a 2nd air flow regulating valve are interlocked-controlled.

According to the water treatment apparatus of this embodiment, the turbidity of the to-be-processed water in a 2nd bubble processing tank is detected by the turbidimeter of a 2nd bubble processing tank, and a control part is based on the signal which shows the said turbidity input from a turbidimeter, Interlock control the opening degree of the second air flow regulating valve. Therefore, for example, the 1st, 2nd air flow control valve so that the signal which shows the said turbidity may show that the to-be-processed water in a 2nd bubble processing tank is cloudy (that is, turbidity is more than a predetermined value). Interlocking control of the opening degree. Thereby, the generation | occurrence | production state of the micro nano bubble in a 1st and 2nd bubble processing tank can be maintained suitably. Therefore, the treatment efficiency of the to-be-processed water in a 1st, 2nd bubble processing tank can be improved.

Moreover, the water treatment apparatus of one Embodiment is the said water treatment apparatus WHEREIN: The said 1st bubble processing tank has a plurality of said 1st micro nano bubble generators, The said 1st bubble processing tank further includes the said 1st micro nano nanoparticles. A submersible pump having a header pipe to which a bubble generator is connected is provided.

According to the water treatment apparatus of this embodiment, since the structure in the case of having a plurality of first micro nanobubble generators can be simplified, the initial cost can be reduced.

Moreover, the water treatment apparatus of one Embodiment is equipped with the water treatment apparatus of the next process in which the to-be-processed water from a said 2nd bubble processing tank is introduce | transduced in the said water treatment apparatus.

According to the water treatment apparatus of this embodiment, since the water to be treated is efficiently pretreated by micro nanobubbles in the first and second bubble treatment tanks, the treatment efficiency in the water treatment apparatus of the next step can be improved.

Moreover, in the water treatment apparatus of one Embodiment, the water treatment apparatus of the said next process is a biological treatment apparatus.

According to the water treatment device of this embodiment, the activity of microorganisms and the like in the biological treatment device can be raised to the cellular level, and the treatment efficiency can be improved. For example, due to the activation of microorganisms, it is significantly effective for the treatment of hardly decomposable chemicals, such as the decomposition of hard surfactants.

Moreover, in the water treatment apparatus of one Embodiment, the water treatment apparatus of the said next process is a chemical treatment apparatus.

According to the water treatment apparatus of this embodiment, the micro nanobubbles act catalytically to the chemical reaction in the chemical treatment apparatus, and the chemical reaction can be enhanced.

Moreover, in the water treatment apparatus of one Embodiment, the water treatment apparatus of the said next process is a physical treatment apparatus.

According to the water treatment apparatus of this embodiment, the micro nanobubbles act physically with respect to the physical treatment in the physical treatment apparatus, and the physical treatment capability such as filtration can be improved.

Moreover, in the water treatment apparatus of one Embodiment, the to-be-processed water from a said 2nd bubble processing tank is introduce | transduced, and is provided with the biological treatment tank which has a liquid film.

According to the water treatment apparatus of this embodiment, since the water to be treated from the first and second bubble treatment tanks in which the micro-nano bubble generation state is confirmed can be introduced into the biological treatment tank having the liquid film, the biological treatment tank having the liquid film. In the present invention, the activity of microorganisms can be treated with microorganisms to increase the activity of microorganisms, thereby improving treatment efficiency.

Moreover, in the water treatment apparatus of one Embodiment, the said biological treatment tank is a deep biological treatment tank which has a lower introduction piping which introduces the to-be-processed water from a said 2nd bubble processing tank below.

According to the water treatment apparatus of this embodiment, the water to be treated (including dissolved oxygen and micro nano bubbles) from the second bubble treatment tank is introduced into the lower portion of the deep biological treatment tank by the force of natural gravity by a lower introduction pipe. We can do it and can save energy necessary for introduction. In addition, energy is remarkably saved compared with the biological treatment method which employs the aeration method by a blower and an acid engine.

Moreover, in the water treatment apparatus of one Embodiment, the deep biological treatment tank has a polyvinylidene chloride packing material.

According to the water treatment apparatus of this embodiment, since the polyvinylidene chloride packing material is provided in the deep-sea biological treatment tank, the deep-sea biological treatment tank can make microorganisms higher concentration and is effective in stabilizing microorganisms. As a result, processing efficiency is improved.

Moreover, in the water treatment apparatus of one Embodiment, the said deep-sea biological treatment tank is arrange | positioned under the 1st diffuser arrange | positioned above the said polyvinylidene chloride packing and below the said liquid film, and below the said polyvinylidene chloride packing. A second diffuser was provided.

According to the water treatment apparatus of this embodiment, even in the aeration caused by the first and second acid pipes, even when the concentration of the microorganisms in the deep-sea biological treatment tank is high, the inside of the tank can be sufficiently stirred to increase the treatment efficiency by the microorganisms. Can be.

Moreover, in the water treatment apparatus of one Embodiment, the said deep biological treatment tank has a micro nano bubble generator.

According to the water treatment apparatus of this embodiment, since the micro-nano bubble generator is installed in the deep-sea biological treatment tank, the microorganisms in the deep-sea biological treatment tank can be activated at the cellular level, and the dissolved oxygen concentration in the tank can be efficiently Can be increased with Moreover, the inside of a tank can be stirred by the water flow which a micro nano bubble generator produces.

Moreover, in the water treatment apparatus of one Embodiment, the deep biological treatment tank is equipped with the water pump which has the header piping to which the said micro nano bubble generator is connected.

According to the water treatment apparatus of this embodiment, since the micro nano bubble generator is connected to the submersible pump via the header pipe, a plurality of micro nanobubble generators can be attached to one submersible pump.

Moreover, in the water treatment apparatus of one Embodiment, the deep biological treatment tank has a polyvinylidene chloride packing material.

According to the water treatment apparatus of this embodiment, the micro nanobubbles directly act on the microorganisms propagating in the polyvinylidene chloride packing, and the activity of the microorganisms can be increased to increase the treatment efficiency.

According to the water treatment method of this invention, in a 1st process, the to-be-processed water is introduce | transduced into the 1st bubble processing tank which has a 1st micro nano bubble generator, and in a 2nd process, the to-be-processed water from a 1st bubble processing tank, It introduce | transduces into the 2nd bubble processing tank which has a 2nd micro nano bubble generator, and confirms the generation | occurrence | production state of the bubble in this 2nd bubble processing tank. Based on the result of confirming the bubble generation state in the second bubble processing tank, in the third process, the operation of the first and second micro nano bubble generators is controlled. Therefore, in the 1st, 2nd bubble processing tank, it becomes possible to adjust and optimize the micro nano bubble generation state by a 1st, 2nd micro nano bubble generator. Therefore, the treatment efficiency of the to-be-processed water by a micro nano bubble can be improved.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment which shows this invention is demonstrated in detail.

(1st embodiment)

1, the 1st Embodiment of the water treatment apparatus of this invention is shown typically.

In FIG. 1, the code | symbol 1 is a 1st bubble processing tank. This first bubble processing tank 1 is provided with three micro nano bubble generators 4A, 4B, and 4C. In this 1st bubble processing tank 1, the quantity and quality of water or wastewater which are introduced are adjusted by the water flow 7 containing micro nano bubbles discharged from three micro nano bubble generators 4A, 4B, and 4C. .

The waters introduced into the first bubble treatment tank 1 include industrial water, tap water, well water, river water and the like. Examples of the drainage to be introduced include factory drainage and domestic drainage. Drainage of a semiconductor factory is mentioned as factory drainage. The characteristic of the drainage of a semiconductor factory is a drainage in which various various chemicals are mixed. However, since a wafer or the like is mainly cleaned in a clean room using chemicals, there is generally little floating material in the factory drainage. Moreover, raw water of ultrapure water may be sufficient as the water introduced into the 1st bubble processing tank 1.

Moreover, in the water tank of the 1st bubble processing tank 1, the header piping 3A which connects the water pump 2A and micronano bubble generators 4A-4C is formed. In addition, this micro nano bubble generator is not limited to three, Four or more may be provided in the 1st bubble processing tank 1, and only the required number may be installed in a water tank.

Water or wastewater as the water to be treated is sucked by the water pump 2A, and the water pump 2A pressurizes the water to 1.5 kg / cm 2 or more to the pressure required by the micro nano bubble generators 4A to 4C. . That is, 1.5 kg / cm <2> or more of the discharge pressure of 2 A of submersible pumps is needed. In addition, the header pipe 3A serves as a header pipe for installing more than necessary micro-nano bubble generators. In this first embodiment, three nanobubble generators 4A to 4C are provided.

In order to manufacture micro nano bubbles, micro nano bubble generators 4A-4C are respectively connected to the air suction piping 5A-5C provided with the air flow volume regulating valves 6A-6C for adjusting required air quantity. Thereby, from the micro nano bubble generator 4A-4C, the water containing micro nano bubble can be discharged as the water flow 7. As shown in FIG. Since the micro nano bubble generators 4A to 4C have small micro nano bubble generating holes, when there is a floating material of 1 mm or more, troubles such as clogging may occur. It is less likely to cause trouble such as clogging due to this cause. That is, since the drainage of a semiconductor factory contains little floating material, it is suitable as a feed water introduce | transduced into micro nano bubble generators 4A-4C.

Moreover, the bubble processing tank pump 9 is provided in the bubble processing tank 1, and by driving this bubble processing tank pump 9, the discharge piping 10 is discharged for the water or waste water which is to be treated water. It transfers to the micro nano bubble generation state confirmation tank 13 as a 2nd bubble processing tank via.

This micro nano bubble generation state confirmation tank 13 is provided with the submersible pump 2B and the micro nano bubble generator 4D in the inside similarly to the 1st bubble processing tank 1, and this submersible pump The header pipe 3B which connects 2B and the micro nano bubble generator 4D is formed. In addition, in this 1st Embodiment, although one micro nano bubble generator 4D is provided in the micro nano bubble generation state confirmation tank 13, you may provide a some micro nano bubble generator.

The purpose of providing the micro nano bubble generation state confirmation tank 13 is to confirm the generation state of a micro nano bubble. The micro nano bubble generator 4D in this micro nano bubble generation state confirmation tank 13 has an air intake pipe 5D in which an air flow rate adjustment valve 6D, which is an automatic valve for adjusting the amount of air necessary for producing the micro nano bubbles, is formed. ) In this first embodiment, the micro nanobubble generating state checking tank 13 is made of transparent vinyl chloride, and the micro nanobubble generating state checking tank 13 generates the micro nanobubble from the micro nanobubble generator 4D. It was possible to easily check the state of occurrence. On the other hand, since the first bubble processing tank 1 is made of concrete or the like, since the first bubble processing tank 1 is larger in capacity than the micro nanobubble generating state checking tank 13, the microbubble bubble is directly confirmed. It is often difficult to do.

Moreover, the turbidimeter 14 and the regulator 11 as a control part are provided in the micro nano bubble generation state confirmation tank 13. The turbidity meter 14 detects turbidity of the water to be treated in the confirmation tank 13 and inputs a signal indicating the turbidity to the control system 11. The regulator 11 controls the opening degree of the air flow regulating valve 6D which is an automatic valve according to the turbidity which the signal from the turbidimeter 14 shows, and automatically controls the amount of air which flows through the regulating valve 6D. In the case where the micro nanobubbles are sufficiently generated in the micro nanobubble generation state confirming tank 13, the treated water in the tank becomes cloudy, so that the numerical value of the turbidity indicated by the signal output by the turbidimeter 14 also becomes a high value. . On the contrary, when the micro-nano bubble is not generate | occur | produced sufficiently in the confirmation tank 13, the to-be-processed water in a tank does not become cloudy and the value of the turbidity meter 14 also becomes a low value.

Thus, for example, the regulator 11 may air so that the signal indicating turbidity indicates that the water to be treated in the confirmation tank 13 as the second bubble treatment tank is cloudy (that is, the turbidity is equal to or greater than a predetermined value). The opening degree of the flow regulating valves 6A to 6C and 6D is interlocked with each other. Thereby, the generation | occurrence | production state of the micro nano bubble in the confirmation tank 13 as a 1st bubble processing tank 1 and a 2nd bubble processing tank can be maintained suitably. Therefore, the treatment efficiency of the to-be-processed water in the 1st bubble processing tank 1 and the confirmation tank 13 can be aimed at.

Moreover, the piping 101 and the valve 12 for returning the to-be-processed water to the bubble processing tank 1 are connected to the micro nano bubble generation state confirmation tank 13. By this piping 101, the valve 12, the discharge piping 10, and the bubble processing tank pump 9, the to-be-processed water containing a micro nano bubble is a micro nano bubble generation state confirmation tank 13 and a bubble. It cycles between the processing tanks 1. As a result, the micro nanobubbles are treated with the water to be treated, and the micro nanobubbles are dissolved as much as possible in the water to be treated.

And the to-be-processed water is introduce | transduced into the water treatment apparatus 15 of the next process from the micro nano bubble generation state confirmation tank 13. The water to be treated is again treated according to the purpose in the water treatment apparatus 15 of the next step.

In addition, as long as it is a commercially available micro-nano bubble generator 4A-4D, it does not restrict | limit a manufacturer, Specifically, the thing of Nano Planet Research Institute Co., Ltd. was employ | adopted. Other products include, for example, a microbubble water production apparatus by Aura TEC Co., Ltd. and a microbubble water production apparatus by Nishibana Industries, Inc., but may be selected according to the purpose.

Here, three types of bubbles will be described.

(i) The normal bubble (bubble) rises in water, and eventually pops out from the surface and disappears.

(ii) The microbubble is a microbubble having a diameter of 50 microns (µm) or less, which is reduced in water and eventually disappears (completely dissolved).

(iii) Nanobubbles are bubbles smaller than microbubbles (100-200 nm in diameter less than 1 micron) and are called bubbles that can be present in water continuously. Micro nanobubbles are microbubbles and nanobubbles mixed. It can be described as a bubble.

In any case, by pre-treating the water to be treated by micro-nano bubble treatment in the bubble treatment tank 1 and the micro-nano bubble generation state confirming tank 13, various loads of water and drainage can be reduced. do.

(2nd embodiment)

Next, FIG. 2 shows 2nd embodiment of the water treatment apparatus of this invention.

This 2nd embodiment differs from the above-mentioned 1st Embodiment in that the biological treatment apparatus 16 was provided instead of the water treatment apparatus 15 of the next process in 1st Embodiment mentioned above. Therefore, in this 2nd Embodiment, the same code | symbol is attached | subjected about the same part as 1st Embodiment mentioned above, and detailed description is abbreviate | omitted. In this second embodiment, only parts different from the first embodiment will be described.

As the biological treatment apparatus 16 provided in this 2nd Embodiment, an aeration tank, a contact oxidation tank, etc. are corresponded.

In this 2nd Embodiment, the to-be-processed water which is spring water or waste water is pretreated with a micro nano bubble, and the load on the biological treatment apparatus 16 is reduced as much as possible. Thereby, the biological treatment apparatus 16 can be made small. That is, in addition to pretreatment with micro-nano bubbles, micro-nano bubbles are contained in the water to be treated and introduced into the biological treatment device 16, thereby activating microorganisms propagating in the biological treatment device 16 with the micro nano-bubbles. You can.

In addition, it is believed that the nanobubble is present in the water to be treated for one month or more, and by dissolving the nanobubble in the water to be treated in the biological treatment device 16, the dissolved oxygen in the biological treatment device 16 can be maintained, and the amount of aeration air Can save.

As a specific example, in the case of treating the developing waste liquid as the semiconductor factory drainage, as the pretreatment apparatus of the biological processing apparatus 16, (i) bubble processing tank (1), (ii) micro nano bubble generation state confirmation tank (13) It can be installed and used.

As a biological treatment apparatus for biological treatment of the developing waste liquid, there are cases where a normal aeration tank and a settling tank are combined, and a sedimentation tank does not have a sedimentation tank and a waste liquid treatment system using only a submerged membrane may be used. , (i) bubble processing tank (1), and (ii) micro nanobubble generation state confirmation tank 13 can be employed.

(Third embodiment)

Next, FIG. 3 shows 3rd embodiment of the water treatment apparatus of this invention.

In this third embodiment, the water treatment device 15 of the next step in the first embodiment is replaced with the chemical treatment device 17. Therefore, in this 3rd Embodiment, the same code | symbol is attached | subjected about the same part as 1st Embodiment, and detailed description is abbreviate | omitted. In this third embodiment, only parts different from the first embodiment will be described.

As the action of the micro nanobubble, it has been found to act catalytically to chemical reactions. Therefore, (i) the chemical reaction in the chemical processing apparatus 17 installed behind the bubble processing tank (1) and (ii) the micro nano bubble generation state confirmation tank 13, by catalysis of a micro nano bubble, It may proceed beyond the usual chemical reactions.

The microbubble in the treated water continues to exist for several minutes in the treated water, and the nanobubble is present in the treated water for at least one month. Therefore, introduction of the water to be treated containing the micro nanobubbles into the chemical treatment device 17 effectively acts to accelerate the chemical reaction.

Specifically, the chemical processing apparatus 17 corresponds to a chemical processing apparatus for hydrofluoric acid drainage as drainage of a semiconductor factory. In this case, the fluorine in the hydrofluoric acid wastewater is treated by the formation of calcium fluoride chemically by the addition of calcium hydroxide (calcined lime), but the treated water contains micro-nano bubbles to promote the chemical reaction. Become valid.

(4th embodiment)

Next, FIG. 4 shows 4th embodiment of the water treatment apparatus of this invention.

In this fourth embodiment, the water treatment device 15 in the next step in the first embodiment is replaced with the physical treatment device 18. Therefore, in this 4th Embodiment, the same code | symbol is attached | subjected about the same part as 1st Embodiment, detailed description is abbreviate | omitted, and only a part different from 1st Embodiment is demonstrated.

As a function of the micro nanobubbles, there is an adsorption action of contaminants in the liquid. In the fourth embodiment, the physical treatment device 18 is subjected to pretreatment of the water to be treated with the micro nanobubbles by (i) the bubble treatment tank (1) and (ii) the micro nanobubble generating state checking tank (13). ) Is introduced. Thereby, the load of the physical processing apparatus 18 provided behind the bubble processing tank 1 and the micro nano bubble generation state confirmation tank 13 can be reduced.

For example, the rapid filter as an example of the physical processing apparatus 18, although clogging due to organic matter occurs, the organic material load as contamination to the rapid filter or the like is reduced, and the number of times of backwashing of the rapid filter tower is reduced. Can be reduced per unit period. In addition, since the contaminant in the water to be treated is adsorbed with micro-nano bubbles, the frequency of exchange of the filter medium in the rapid filter can be reduced.

(5th embodiment)

Next, FIG. 5 shows 5th embodiment of the water treatment apparatus of this invention. This fifth embodiment corresponds to a modification of the first embodiment described above. Therefore, in this 5th Embodiment, the same code | symbol is attached | subjected about the same part as 1st Embodiment mentioned above, detailed description is abbreviate | omitted, and only a part different from 1st Embodiment is demonstrated.

In this fifth embodiment, a deep-sea biological treatment tank 19 is provided in place of the water treatment apparatus 15 of the next step in the above-described first embodiment.

In this fifth embodiment, the to-be-treated water pretreated in (i) the bubble treatment tanks (1) and (ii) the micro nanobubble generation state confirmation tank 13 is introduced into the deep-sea biological treatment tank 19. In this deep biological treatment tank 19, the lower part introduction piping for introducing the to-be-processed water from the micro-nano bubble generation state confirmation tank 13 into the lower part of the deep-sea biological treatment tank 19 by natural force. (20) It is provided at the end of the deep biological treatment tank (19). 5, the code | symbol 21 is the arrow which shows typically the direction of water flow.

In addition, the deep biological treatment tank 19 is provided with a liquid film 24 and a gravity pipe 25 on the side opposite to the lower introduction pipe 20, and efficiently treats the water to be treated. This gravity pipe 25 flows out to-be-processed water using gravity (water head difference). In addition, a submerged film cleaning blower 23 and an diffuser 22 for air washing the submerged film 24 are provided, and the submerged film 24 is air-washed by air discharged from the diffuser 22. Doing. As a result, the processing capacity of the liquid film 24 can be stably maintained.

In addition, since (i) the bubble treatment tank (1) and (ii) the micro-nano bubble generation state confirmation tank 13 contain the micro-nano bubbles in the water to be treated, they are propagated in the deep-sea biological treatment tank 19. Microorganisms are activated to improve processing capacity. In particular, about the hardly decomposable chemical substance contained in a to-be-processed object, compared with the decomposability in the biological treatment tank which does not have a micro-nano bubble, it is remarkably high in efficiency to contain micro-nano bubble in to-be-processed water. The reason for the high processing efficiency is the activation of microorganisms by micro nanobubbles.

(6th Embodiment)

Next, FIG. 6 shows a sixth embodiment of the present invention. This sixth embodiment corresponds to a modification of the fifth embodiment described above. Therefore, in this 6th Embodiment, the same code | symbol is attached | subjected about the same part as 5th Embodiment mentioned above, detailed description is abbreviate | omitted, and only a part different from 5th Embodiment is demonstrated.

In the sixth embodiment, the deep biological treatment tank 19F is provided in place of the deep biological treatment tank 19. In the fifth embodiment described above, the deep-sea biological treatment tank 19 constitutes an aeration means by the diffuser 22 and the submerged film cleaning blower 23. On the other hand, the deep biological treatment tank 19F of the water treatment apparatus according to the sixth embodiment includes the diffuser 22A, the submerged membrane cleaning blower 23, the diffuser 22B, and the stirring blower 26. It constitutes an aeration means.

In the deep biological treatment tank 19F, a means for smoothly maintaining the processing ability of the microorganisms may be stirred in the tank. The aeration means in the deep biological treatment tank 19F includes the diffuser 22A, the submerged film cleaning blower 23, the diffuser 22B, and the stirring blower 26. The inside of (19F) can be fully stirred, and especially an aerobic microorganism can be kept smooth. That is, in the deep biological treatment tank 19F of the sixth embodiment, the microorganisms are treated more than the deep biological treatment tank 19 of the fifth embodiment which does not include the diffuser 22B and the stirring blower 26. Improve your skills.

(7th Embodiment)

Next, FIG. 7 shows a seventh embodiment of the present invention. This seventh embodiment corresponds to a modification of the fifth embodiment described above. Therefore, in this 7th Embodiment, the same code | symbol is attached | subjected about the same part as 5th Embodiment mentioned above, detailed description is abbreviate | omitted, and only a part different from 5th Embodiment is demonstrated.

In this seventh embodiment, a deep biological treatment tank 19G is provided instead of the deep biological treatment tank 19. In the fifth embodiment described above, the packing material was not provided in the deep-sea biological treatment tank 19. In contrast, in the seventh embodiment, the polyvinylidene chloride filler 27 is provided in the tank of the deep biological treatment tank 19G.

In this seventh embodiment, the polyvinylidene chloride filler 27 is filled in the tank as a filler as a means for smoothly maintaining the processing capacity of the microorganisms in the deep biological treatment tank 19G. As a result of the filling of the polyvinylidene chloride filler 27, the microorganisms are immobilized and propagated stably with the filler 27, so that the processing capacity can be maintained smoothly. Therefore, in this seventh embodiment, the processing capacity of the deep-sea biological treatment tank 19G can be improved as compared with the deep-sea biological treatment tank 19 of the above-described fifth embodiment.

(8th Embodiment)

Next, FIG. 8 shows an eighth embodiment of the water treatment apparatus of the present invention. This eighth embodiment corresponds to a modification of the sixth embodiment described above. Therefore, in this 8th Embodiment, the same code | symbol is attached | subjected about the same part as 6th Embodiment mentioned above, detailed description is abbreviate | omitted, and only a part different from 6th Embodiment is demonstrated.

In the eighth embodiment, the deep biological treatment tank 19H is provided instead of the deep biological treatment tank 19F. In the sixth embodiment described above, in the deep-sea biological treatment tank 19F, no packing material is provided in the tank. In contrast, in the eighth embodiment, the polyvinylidene chloride filler 27 is provided in the tank of the deep biological treatment tank 19H. As illustrated in FIG. 8, this polyvinylidene chloride filler 27 is disposed between the acid pipe 22A and the acid pipe 22B as an example.

That is, in this eighth embodiment, the polyvinylidene chloride filler 27 is filled in the tank as a filler as a means for smoothly maintaining the processing capacity of the microorganisms in the deep biological treatment tank 19H. By filling this polyvinylidene chloride filler 27, microorganisms are immobilized and propagated stably in the filler 27, so that the processing capacity can be maintained smoothly. Therefore, in this eighth embodiment, the processing capacity can be higher than that in the fifth embodiment.

(Ninth embodiment)

Next, FIG. 9 shows a ninth embodiment of the water treatment apparatus of the present invention. This ninth embodiment is a modification of the fifth embodiment described above. Therefore, in this 9th Embodiment, the same code | symbol is attached | subjected about the same part as 5th Embodiment, detailed description is abbreviate | omitted, and only a part different from 5th Embodiment is demonstrated.

In this ninth embodiment, a deep-sea biological treatment tank 19K is provided instead of the deep-sea biological treatment tank 19 of the fifth embodiment.

In the deep biological treatment tank 19 of the fifth embodiment described above, the water pump, the micro nano bubble generator, the piping, and the air flow regulating valve were not provided in the tank 19. On the other hand, in this ninth embodiment, the submersible pump 2C, the micro nanobubble generator 4E, the submersible pump 2C and the micro nanobubble generator 4E are connected in the tank of the deep-sea biological treatment tank 19K. The piping 3C is provided. Moreover, the deep biological treatment tank 19K is provided with the air suction piping 5E connected to the micro nano bubble generator 4E, and the air flow control valve 6E formed in the air suction piping 5E.

In the ninth embodiment, in the deep biological treatment tank 19K, the water pump 2C, the micro nano bubble generator 4E, and the air in the tank 19K are provided as means for maintaining the processing capacity of the microorganisms as smoothly as possible. The suction pipe 5E and the air flow regulating valve 6E were provided. By operating these, micro-nano bubbles are generated in the deep-sea biological treatment tank 19K, and the microorganisms in the deep-sea biological treatment tank 19K can be activated to increase the processing ability of the microorganisms.

(10th embodiment)

Next, FIG. 10 shows a tenth embodiment of the water treatment apparatus of the present invention. This tenth embodiment corresponds to a modification of the ninth embodiment described above. Therefore, in this 10th embodiment, the same code | symbol is attached | subjected about the same part as 9th embodiment mentioned above, detailed description is abbreviate | omitted, and only a part different from the above-mentioned 9th embodiment is demonstrated.

In the tenth embodiment, the deep biological treatment tank 19M is provided instead of the deep biological treatment tank 19K. In the deep biological treatment tank 19K in the ninth embodiment described above, the polyvinylidene chloride filler 27 was not provided in the tank. On the other hand, in this tenth embodiment, the polyvinylidene chloride filler 27 is provided in the tank of the deep biological treatment tank 19M.

That is, in this tenth embodiment, in the deep-sea biological treatment tank 19M, the water pump 2C, the micro-nano bubble generator 4E, in the tank 19M as means for maintaining the processing capacity of microorganisms as smoothly as possible. In addition to the piping 5E and the air flow regulating valve 6E, the polyvinylidene chloride filler 27 was provided. By driving these, micro nanobubbles are generated in the deep biological treatment tank 19M in this tenth embodiment. Thereby, the microorganism propagating to the polyvinylidene chloride packing 27 in the deep tank biological treatment tank 19M and the microorganism in a flowing tank can be activated, and the processing capacity of a microorganism can be maximized.

Experimental Example

The experimental apparatus corresponding to the water treatment apparatus of 1st Embodiment shown in FIG. 1 was produced. In this experimental apparatus, the capacity of the bubble processing tank 1 is 300 liters and the capacity of the micro nanobubble generating state confirmation tank 13 is 80 liters. After commissioning this experimental apparatus only for about 2 days, the to-be-processed water was continuously introduce | transduced into the bubble processing tank 1 and micro nano bubble generation state confirmation tank 13 which this experimental apparatus has. This treated water was drained from the semiconductor factory, and the dissolved oxygen concentration in the wastewater was measured to be 0 ppm. Then, the experimental apparatus was operated for 3 days to wait for the water quality to stabilize, and the dissolved oxygen concentration of the water to be treated at the outlet of the micro-nano bubble generation state confirming tank 13 was measured, and the result was 6 ppm.

Although the present invention has been described above, it is obvious that the present invention can be modified by many methods. These changes do not appear to deviate from the spirit and scope of the present invention, and all obvious improvements to those skilled in the art are construed as being included within the scope of the following claims.

Through the present invention, it is possible to provide a water treatment method and an apparatus for treating water by generating micro nano bubbles stably and efficiently.

Claims (15)

A first step of introducing the water to be treated into a first bubble treatment tank having a first micro nano bubble generator; A second step of introducing the water to be treated from the first bubble treatment tank into a second bubble treatment tank having a second micro nanobubble generator to confirm the state of generation of bubbles in the second bubble treatment tank; And In the second step, the detection unit checks the turbidity of the water to be treated to display the bubble generation state, and based on the result of the check, the third step of controlling the operation of the first and second micro nanobubble generators. Water treatment method characterized in that it comprises. A first bubble treatment tank having a first micro nano bubble generator while being introduced with water to be treated; A second bubble treatment tank having a second micro-nano bubble generator and a detector for detecting turbidity of the water to be treated which indicates the state of generation of the bubble while introducing the water to be treated from the first bubble treatment tank; And And a control unit for controlling the operation of the first and second micro nano bubble generators based on the bubble generation state detected by the detection unit. The method of claim 2, A first air intake pipe connected to the first micro nano bubble generator; A second air intake pipe connected to the second micro nano bubble generator; A first air flow control valve connected to the first air intake pipe; And And a second air flow control valve connected to the second air intake pipe, The detection unit is a turbidity meter for detecting the turbidity of the water to be treated in the second bubble treatment tank, And the control unit interlockedly controls the opening degree of the first air flow control valve and the opening degree of the second air flow control valve based on the signal representing the turbidity input from the turbidimeter. The method of claim 2, The first bubble processing tank, Having a plurality of the first micro nano bubble generator, Furthermore, the said 1st bubble processing tank is equipped with the water pump which has a header pipe with which the said 1st micro nano bubble generator was connected. The method of claim 2, And a water treatment device for the next step of introducing the water to be treated from the second bubble treatment tank. The method of claim 5, The water treatment apparatus of the next step is a biological treatment apparatus. The method of claim 5, The water treatment apparatus of the next process is a chemical treatment apparatus. The method of claim 5, The water treatment apparatus of the next process is a physical treatment apparatus. The method of claim 2, The biological treatment tank which introduce | transduces the to-be-processed water from a said 2nd bubble processing tank, and has a submerged film. The method of claim 9, The biological treatment tank, It is a deep-sea biological treatment tank which has a lower inlet piping which introduces to-be-processed water from a said 2nd bubble processing tank below. The method of claim 10, The deep water biological treatment tank has a polyvinylidene chloride filler. The method of claim 11, The deep biological treatment tank, A first acid engine disposed above the polyvinylidene chloride packing and below the submerged film; And a second diffuser disposed below the polyvinylidene chloride filling. The method of claim 10, The deep biological treatment tank has a micro nano bubble generator. The method of claim 13, The deep biological treatment tank, And a submersible pump having a header pipe to which the micro nanobubble generator is connected. The method of claim 13, The deep biological treatment tank, A water treatment device having a polyvinylidene chloride filler.

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