JP2007083108A - Method and apparatus for treating liquid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for treating a liquid, in each of which a minute air bubble can be generated efficiently in the liquid and utilized efficiently. <P>SOLUTION: The apparatus for treating the liquid is characterized in that the liquid (for example, water) is pumped up from an original liquid tank 1 by a pump 2 and introduced into a triangular weir liquid tank 4 through a pipeline L1 and the liquid 5 overflowing a triangular weir 4A of the triangular weir liquid tank 4 is made to fall naturally together with air and introduced into a minute air bubble generation tank 6 arranged below the triangular weir liquid tank. An impeller rotation part 11 is allowed to pump the liquid while producing a whirling current in the liquid 5 to generate the minute air bubble 16 in the liquid 5 in the minute air bubble generation tank 6. Since the minute air bubble is generated by using all-purpose equipment such as a pump and a tank, the initial cost of this apparatus can be reduced and the maintenance of this apparatus can be facilitated. The generated state of the minute air bubble can be confirmed in a minute air bubble confirmation tank 15. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a liquid processing method and a liquid processing apparatus. The present invention relates to a liquid processing method and a liquid processing apparatus that can generate fine bubbles efficiently in a liquid and can be widely used for a reaction apparatus in a factory and a processing apparatus related to wastewater treatment, for example. Furthermore, as an example, the present invention relates to a liquid processing method and a liquid processing apparatus for the purpose of newly producing water containing fine bubbles and introducing it into the next process apparatus to increase the processing efficiency in the next process apparatus. is there.

  Conventionally, in a reaction method, a reaction apparatus, and a treatment method and a treatment apparatus in wastewater treatment, there are conventionally some methods and apparatuses as a general pretreatment method and a pretreatment apparatus.

  As an example, the processing performed by the pretreatment device of the biological treatment device in wastewater treatment includes precipitation, filtration, pH adjustment, ozone oxidation, adsorption, and the like. The purpose of the pretreatment device is to reduce the biological, chemical, or physical load on the wastewater treatment device in the next process. Reduction, improvement in the quality of treated water from wastewater treatment equipment, etc. can be expected.

  Moreover, the utilization method and apparatus of the nanobubble as a prior art are disclosed by patent document 1 (Unexamined-Japanese-Patent No. 2004-121962).

  This technology utilizes the characteristics of nanobubbles such as reduction of buoyancy, increase of surface area, increase of surface activity, generation of local high-pressure field, and surface active action and bactericidal action by realizing electrostatic polarization. More specifically, by interlinking them, various objects can be washed with high functionality and low environmental load by the adsorption function of dirt components, the high-speed washing function of the object surface, and the sterilization function. It discloses that purification can be performed.

  Another conventional technique for generating nanobubbles is disclosed in Patent Document 2 (Japanese Patent Laid-Open No. 2003-334548).

  In this technique, in a liquid, (1) a step of cracking and gasifying a part of the liquid, (2) a step of applying ultrasonic waves in the liquid, or (3) a step of cracking and gasifying a part of the liquid and It discloses that it is composed of a step of applying ultrasonic waves.

By the way, while the action and function of the fine bubbles are being investigated, a method and an apparatus that can efficiently generate and use the fine bubbles are required.
JP 2004-121962 A JP 2003-334548 A

  Therefore, an object of the present invention is to provide a liquid processing method and a liquid processing apparatus that can efficiently generate and use fine bubbles in a liquid.

In order to solve the above problems, a liquid treatment method according to the present invention includes a first step of allowing a liquid to drop naturally and introducing a mixture of the liquid and air resulting from the natural drop into a fine bubble generation tank having a pump;
Operate the pump of the fine bubble generation tank, generate fine bubbles in the liquid in the fine bubble generation tank, and introduce the mixture containing the fine bubbles and the liquid into the fine bubble confirmation tank, A second step of confirming the state of occurrence of fine bubbles in the liquid;
After confirming the generation state of the fine bubbles in the second step, the method includes a third step of introducing the mixture containing the fine bubbles and the liquid from the fine bubble confirmation tank to the next process device. .

  According to the present invention, since natural bubbles of liquid are generated and fine bubbles are generated by general-purpose equipment and general-purpose equipment such as a pump and a tank, the initial cost for generating the fine bubbles can be kept low. In addition, maintenance management is easy and the running cost can be reduced. In addition, after confirming the generation state of the fine bubbles in the second step, the mixture containing the fine bubbles and the liquid (for example, water) is introduced into the next process device in the third step. A mixture in which fine bubbles are reliably generated can be used. Therefore, according to the present invention, fine bubbles are efficiently generated, and desired functions such as a function of adsorbing dirt components by a liquid containing fine bubbles, an object surface cleaning function, a sterilizing function, and a physiologically active function are efficiently performed. Available to: The method of the present invention can be applied not only to water treatment, wastewater treatment, and pure water treatment, but also to the case of using a liquid containing fine bubbles. In the present invention, the fine bubbles are, for example, bubbles having a size of several hundred μm or less.

Further, the liquid processing apparatus according to an embodiment stores a liquid in a predetermined amount and introduces a liquid tank that naturally drops the stored liquid,
A fine bubble generating tank in which a mixture of liquid and air by natural fall is introduced from the water tank and a pump is installed, and fine bubbles are generated in the mixture by operation of the pump;
A mixture containing fine bubbles is introduced from the fine bubble generation tank, and a fine bubble confirmation tank capable of confirming the generation state of fine bubbles in the mixture is provided.

  According to the liquid processing apparatus of this embodiment, since natural bubbles of liquid are generated and fine bubbles are generated by general-purpose equipment and general-purpose equipment such as pumps and tanks, the initial cost for generating fine bubbles is reduced. In addition to being able to suppress this, maintenance management is easy and the running cost can be reduced. Further, after confirming the generation state of the fine bubbles in the fine bubble confirmation tank, a mixture containing the fine bubbles and the liquid (for example, water) can be introduced from the fine bubble confirmation tank into the next process apparatus. Therefore, a mixture in which fine bubbles are reliably generated can be used in the next process apparatus. Therefore, according to this liquid processing apparatus, fine bubbles can be efficiently generated and used efficiently.

  Moreover, in the liquid processing apparatus of one embodiment, the liquid tank has a weir that causes the stored liquid to overflow and naturally drop.

  According to this embodiment, the flow rate of the liquid that is naturally dropped can be adjusted by the weir of the liquid tank.

  Moreover, in the liquid processing apparatus of one Embodiment, the pump which the said microbubble generation tank has has the pumping capacity more than pumping up the mixture of the said introduced liquid and air.

  According to the liquid processing apparatus of this embodiment, since the pump has a pumping capacity more than pumping a mixture of the introduced liquid (for example, water) and air, the pump In addition to the mixture with air, fresh air can be taken up. As a result, fine bubbles are more likely to be generated. For example, when the impeller of the pump rotates at a high speed, a swirling flow can be generated in the mixture of liquid and air and new air, and fine bubbles can be generated effectively.

  Moreover, in the liquid processing apparatus of one Embodiment, the said pump is a submerged pump.

  According to this embodiment, since the pump is a submerged pump (for example, a submersible pump), it can be easily obtained at low cost, is economical, and generally has high utility value.

  The liquid processing apparatus according to an embodiment further includes a fine bubble generation aid addition unit that adds a fine bubble generation aid to the liquid stored in the liquid tank.

  According to this embodiment, since the fine bubble generating aid is added to the liquid (for example, water) stored in the liquid tank, the fine bubbles can be generated efficiently.

  In one embodiment of the liquid processing apparatus, the fine bubble generation aid is a combination of one or more substances selected from surfactants, alcohols, and salts.

  According to this embodiment, the generation of fine bubbles by the fine bubble generation aid can be particularly promoted, and since the fine bubble generation aid is easy to procure, the running cost can be reduced.

  Moreover, in the liquid processing apparatus of one Embodiment, the biological reaction apparatus as a next process apparatus in which the mixture containing the said microbubble is introduce | transduced from the said microbubble confirmation tank is provided.

  According to this embodiment, since the mixture containing fine bubbles is introduced into the biological reaction apparatus as the next process apparatus, the performance of the biological reaction by the biological reaction apparatus can be enhanced. In addition, although this biological reaction apparatus is used for a wastewater treatment or a water treatment as an example, it is not restricted to a wastewater treatment or a water treatment, and corresponds to the apparatus using a biological reaction widely.

  Moreover, in the liquid processing apparatus of one Embodiment, the chemical reaction apparatus as a next process apparatus in which the mixture containing the said microbubble is introduce | transduced from the said microbubble confirmation tank is provided.

  According to this embodiment, the chemical reaction of the chemical reaction device can be catalytically increased by the fine bubbles, and the performance of the chemical reaction device can be enhanced. In addition, this chemical reaction apparatus is used for wastewater treatment or water treatment as an example, but is not limited to wastewater treatment or water treatment, and widely corresponds to an apparatus that uses a chemical reaction.

  Moreover, in the liquid processing apparatus of one Embodiment, the physical processing apparatus as a next process apparatus in which the mixture containing the said microbubble is introduce | transduced from the said microbubble confirmation tank is provided.

  According to this embodiment, the fine bubbles effectively act on and promote physical processing such as filtration in the physical processing apparatus, so that the performance of physical processing can be enhanced. In addition, although this physical processing apparatus is used for wastewater treatment or water treatment as an example, it is not limited to wastewater treatment or water treatment, and widely corresponds to a device that uses physical treatment.

  Moreover, in the liquid processing apparatus of one Embodiment, the waste water treatment apparatus as a next process apparatus in which the mixture containing the said fine bubble is introduce | transduced from the said fine bubble confirmation tank is provided.

  According to this embodiment, the fine bubbles act on the entire wastewater treatment by the wastewater treatment apparatus, and can improve the performance of the treatment.

  In one embodiment of the liquid treatment apparatus, the waste water treatment apparatus includes a biological treatment apparatus.

  According to this embodiment, since the fine bubbles particularly effectively act on the biological treatment by the biological treatment device among the wastewater treatment devices, the wastewater treatment performance by the biological treatment of the biological treatment device can be improved.

  In one embodiment, the waste water treatment apparatus includes a chemical treatment apparatus.

  According to this embodiment, since the fine bubbles act particularly effectively on the chemical treatment device of the wastewater treatment device, the wastewater treatment performance by the chemical treatment of the chemical treatment device can be improved.

  In one embodiment, the waste water treatment apparatus includes a physical treatment apparatus.

  According to this embodiment, the fine bubbles act particularly effectively on the physical treatment device of the wastewater treatment device, so that the wastewater treatment performance by the physical treatment of the physical treatment device can be improved.

  In one embodiment, the liquid treatment apparatus includes a deep biological treatment tank as a next process apparatus into which the mixture containing the fine bubbles is introduced from the fine bubble confirmation tank. It has a vinylidene filling and a submerged membrane.

  In this embodiment, since the microorganisms propagate in the polyvinylidene chloride packing of the deep biological treatment tank, the microorganism concentration in the deep biological treatment tank is high, and the activity of the microorganisms in which the fine bubbles are high is increased. The efficiency of treatment with microorganisms can be improved.

  Moreover, in the liquid processing apparatus of one Embodiment, the 1 or more micro nano bubble generator is installed in the said microbubble confirmation tank.

  In this embodiment, since the liquid (for example, water) containing both fine bubbles and micro-nano bubbles can be introduced into the next process apparatus from the microbubble confirmation tank, the performance of the next process apparatus as the utilization apparatus is significantly improved. Can do. That is, a synergistic effect with respect to various liquid treatments by both fine bubbles and micro / nano bubbles can be expected, and the degree of influence by bubbles in the next process apparatus increases. Microbubbles are bubbles with a diameter of 50 microns (μm) or less, nanobubbles are ultrafine bubbles with a diameter of 1 micron (μm) or less, and micronanobubbles are bubbles containing both microbubbles and nanobubbles. .

  Further, in the liquid processing apparatus according to one embodiment, the fine bubble confirmation tank includes a fine bubble confirmation unit for confirming generation of fine bubbles, and a micro / nano bubble generation unit partitioned with respect to the fine bubble confirmation unit. Have.

  In this embodiment, the generation of fine bubbles can be confirmed by the fine bubble confirmation unit, and the generation of micro / nano bubbles can be performed by the micro / nano bubble generation unit. That is, generation of fine bubbles and generation of micro / nano bubbles can be confirmed in separate sections. For example, by forming a predetermined portion of the tank wall of the microbubble confirmation tank with a transparent material (for example, a transparent resin), it is possible to visually confirm the occurrence of microbubbles and micro / nano bubbles. Therefore, it becomes possible to introduce the mixture containing the fine bubbles and the micro / nano bubbles into the next process apparatus, so that the entire system can be optimized and the efficiency can be improved.

  According to the present invention, since natural bubbles of liquid are generated and fine bubbles are generated by general-purpose equipment and general-purpose equipment such as a pump and a tank, the initial cost for generating the fine bubbles can be kept low. In addition, maintenance management is easy and the running cost can be reduced. In addition, after confirming the generation state of the fine bubbles in the second step, the mixture containing the fine bubbles and the liquid (for example, water) is introduced into the next process device. The resulting mixture can be used. Therefore, according to the present invention, fine bubbles are efficiently generated, and desired functions such as a function of adsorbing dirt components by a liquid containing fine bubbles, an object surface cleaning function, a sterilizing function, and a physiologically active function are efficiently performed. Available to: The method of the present invention can be applied not only to water treatment, wastewater treatment, and pure water treatment, but also to the case of using a liquid containing fine bubbles.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

(First embodiment)
FIG. 1 schematically shows a liquid processing apparatus as a first embodiment of the liquid processing apparatus of the present invention.

  Reference numeral 1 denotes a stock solution tank into which a liquid (water as an example) is introduced. A pump 2 that pumps the liquid (as an example, water) introduced into the stock solution tank 1 and sends it to a pipe L1 via a valve 3. is set up. The liquid level 9A of the stock solution tank 1 may fluctuate or may be constant.

  The liquid (for example, water) introduced into the stock solution tank 1 is pumped up by the pump 2 and sent to the pipe L1, and the discharge flow rate from the pipe L1 is adjusted by the valve 3. And the said liquid is introduce | transduced into the triangular weir liquid tank 4 from this piping L1. The triangular weir liquid tank 4 is a water tank in which a triangular weir 4A capable of measuring a flow rate is attached to the liquid outlet.

  In the triangular weir liquid tank 4, when the liquid flow rate is large, the liquid level at the triangular weir 4A rises. Conversely, when the liquid flow rate is small, the liquid level at the triangular weir 4A falls. The point is that the flow rate when the liquid passes through the triangular weir 4A is measured on the liquid surface, and the scale defined by JIS is attached to the weir portion of the triangular weir 4A. This scale represents the flow rate. The triangular weir 4A is generally made of a vinyl chloride plate or a plastic plate.

  In the triangular weir liquid tank 4, the flow rate can be measured by the height of the liquid surface at the triangular weir 4A. For example, in this triangular weir liquid tank 4, even if many kinds of liquids are mixed, the flow rate of the mixed fluid can be measured by reading the height of the liquid level in the triangular weir 4A on the scale. This flow rate measurement method is also defined by JIS.

  To the triangular weir liquid tank 4, a necessary amount of fine bubble generation aid stored in the fine bubble generation aid tank 13 is added by a metering pump 14. Specific examples of the fine bubble generation aid include surfactants, alcohols, and salts.

  These fine bubble generation assistants are added to the triangular weir liquid tank 4 and mixed with the liquid, dropped from the weir 4A of the triangular weir liquid tank 4, and the mixture of the naturally falling liquid 5 and air is generated into fine bubbles. Introduce into the tank 6. As a result of confirming the generation state of the fine bubbles in the fine bubble confirmation tank 15 which will be described later, when the generation state of the fine bubbles is insufficient, the opening of the valve 3 is adjusted to adjust the pipe L1 from the stock solution tank 1. The amount of liquid introduced through the triangular weir 4A is adjusted to determine the optimum amount of fine bubbles generated.

  Then, the liquid 5 and the air (bubbles 7) accumulated in the tank 6 are pumped up by the submerged pump 10 having a relatively large capacity installed in the fine bubble generating tank 6, thereby the liquid 5 In this state, fine bubbles are easily generated. In addition, 9B is an example of the liquid level in the fine bubble generation tank 6.

  Although the shape and material of the fine bubble generating tank 6 are not particularly limited, in this embodiment, the fine bubble generating tank 6 is a substantially cylindrical container having a cylindrical portion 6A and a tapered mortar-shaped portion 6B. . According to such a cylindrical tank 6, the falling time of the liquid 5 that naturally falls from the weir 4A is lengthened and mixed while dropping the falling liquid 5 and air, and after mixing, the submerged pump ( As an example, the submersible pump 10) can conveniently pump the liquid 5 together with air.

  The submerged pump 10 has an impeller rotating unit 11 at the lower part. Since the impeller rotating unit 11 lifts the mixture of the liquid 5 and air accumulated in the mortar-shaped portion 6B while causing a swirling flow, fine bubbles 16 are easily generated in the liquid 5.

  In this embodiment, the pumping capacity of the submerged pump 10 is larger than the amount of the mixture of the liquid 5 and air falling from the weir 4 </ b> A of the triangular weir liquid tank 4. Accordingly, the liquid level 9B is always at a low water level, and the impeller rotating unit 11 of the submerged pump 10 pumps the liquid 5 and new air at the same time. Therefore, fine bubbles 16 are efficiently generated.

  Further, a valve 12 is installed at the outlet pipe L2 of the submerged pump 10, and the amount of the mixture of the liquid 5 and air introduced from the fine bubble generation tank 6 to the fine bubble confirmation tank 15 can be adjusted by the valve 12. It has become. Further, the valve 12 can adjust the generation state of the fine bubbles 16 in the fine bubble confirmation tank 15. The new liquid containing the fine bubbles 16 is introduced into the next process device 17 from the fine bubble confirmation tank 15, and the reaction efficiency and the processing efficiency in the next process device 17 are greatly improved. Reference numeral 9 </ b> C indicates the liquid level in the fine bubble confirmation tank 15. If a part or all of the tank wall of the microbubble confirmation tank 15 is made of a transparent material (resin or the like), the generation state of the microbubbles 16 in the tank 15 can be confirmed with the naked eye.

  Further, according to this embodiment, since the fine bubbles are generated in the liquid by the general equipment such as the pump 10 and the tank 6 and the general equipment, the initial cost for generating the fine bubbles is kept low. In addition, maintenance management is easy and the running cost can be reduced.

  Further, after confirming the generation state of the fine bubbles in the fine bubble confirmation tank 15, the mixture containing the fine bubbles and the liquid (for example, water) can be introduced from the fine bubble confirmation tank 15 into the next process device 17. Note that, as a result of confirming the generation state of the fine bubbles in the fine bubble confirmation tank 15, if the generation state of the fine bubbles is insufficient, as described above, the opening degree of the valve 3 or the valve 12 is adjusted to adjust the fine bubbles. It is possible to make the occurrence state of the optimum state.

  Therefore, in the next process apparatus 17, a mixture in which fine bubbles are reliably generated can be used. Therefore, according to this embodiment, fine bubbles can be efficiently generated and used efficiently. For example, with a liquid containing fine bubbles, a desired treatment can be performed using a dirt component adsorption function, an object surface cleaning function, a sterilization function, a physiological activity function, and the like.

(Second embodiment)
Next, FIG. 2 shows a second embodiment of the present invention. This second embodiment differs from the first embodiment described above only in that the next process device 17 in FIG. 1 is replaced with a biological reaction device 18. Therefore, in the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals and detailed description thereof is omitted, and only the parts different from the first embodiment will be described.

  In the second embodiment, as in the first embodiment, the target liquid (water as an example) contains fine bubbles, and the liquid containing the fine bubbles is introduced into the biological reaction apparatus 18. Thereby, the system with the excellent biological reaction efficiency by the biological reaction apparatus 18 can be provided. Examples of the biological reaction apparatus 18 include a reaction apparatus related to fermentation and brewing, a biological reaction apparatus related to pharmaceutical production, and the like, and has a wide application range.

(Third embodiment)
Next, FIG. 3 shows a third embodiment of the present invention. The third embodiment differs from the first embodiment described above in that a chemical reaction device 19 is provided instead of the next process device 17 in the first embodiment of FIG. Therefore, in the third embodiment, the same parts as those of the first embodiment described above are denoted by the same reference numerals and detailed description thereof is omitted, and parts different from the first embodiment will be described.

  In the third embodiment, as in the first embodiment, the target liquid (water as an example) contains fine bubbles, and the liquid containing the fine bubbles is introduced into the chemical reaction device 19. In the chemical reaction device 19, the chemical reaction in the chemical reaction device 19 is advanced more than the normal chemical reaction by the catalytic action of the new liquid including the fine bubbles that have exited the fine bubble confirmation tank 15. It has been experimentally found that fine bubbles in a liquid act catalytically on chemical reactions.

  It is said that the fine bubbles in the liquid exist for several minutes in the liquid, and if there are nanobubbles of the minimum size, they exist in the liquid for one month or longer. Therefore, the liquid containing such fine bubbles is effective for promoting the chemical reaction in the chemical reaction device 19. In addition, as a chemical reaction apparatus 19, all kinds of chemical reaction apparatuses in a chemical factory correspond as a specific example. For example, all devices related to chemical reaction such as organic synthesis reaction device, inorganic synthesis reaction device, neutralization reaction device, chemical water treatment device, chemical waste water treatment device and the like are applicable.

(Fourth embodiment)
Next, FIG. 4 shows a fourth embodiment of the present invention. The fourth embodiment differs from the first embodiment described above in that a physical processing device 20 is provided instead of the next process device 17 in the first embodiment of FIG. Therefore, in the fourth embodiment, the same parts as those of the first embodiment described above are denoted by the same reference numerals and detailed description thereof will be omitted, and parts different from the first embodiment will be described.

  In the fourth embodiment, as in the first embodiment, the target liquid contains fine bubbles, and the liquid containing the fine bubbles is introduced into the physical processing apparatus 20. Here, the inclusion of fine air in the liquid has an effect as a pretreatment before the liquid to be treated is introduced into the physical processing apparatus 20.

  That is, the liquid introduced into the physical processing device 20 from the fine bubble confirmation tank 15 is a liquid that has been pre-processed and contains fine bubbles, so that the performance of physical processing in the physical processing device 20 can be improved. For example, rapid filtration in wastewater treatment as an example of physical treatment requires a backwashing process in order to improve the clogging due to the occurrence of clogging due to organic matter when organic matter is present in the wastewater as liquid. Here, since the waste water contains fine bubbles, the fine bubbles can reduce clogging by organic matter as dirt on the rapid filter and the like, and the number of backwashing of the rapid filtration tower can be reduced per unit period. .

  In addition, as said physical processing apparatus, the apparatus which performs all physical processes, such as a general filtration apparatus, a membrane filtration apparatus, a dehydration apparatus, an adsorption apparatus, a precipitation apparatus, an extraction apparatus, and a crystallization apparatus, corresponds as a specific example.

(Fifth embodiment)
Next, FIG. 5 shows a fifth embodiment of the present invention. The fifth embodiment differs from the first embodiment described above in that a waste water treatment device 21 is provided instead of the next process device 17 in the first embodiment of FIG. Therefore, in the fifth embodiment, the same parts as those in the first embodiment described above are denoted by the same reference numerals, detailed description thereof will be omitted, and different parts from the first embodiment will be described.

  In the fifth embodiment, the liquid introduced into the stock solution tank 1 is waste water from the factory. And the waste water treatment apparatus 21 is a waste water treatment apparatus which is installed in various factories, for example. In the fifth embodiment, in the same manner as in the first embodiment, fine bubbles are contained in the wastewater that is the target liquid, and the wastewater containing the fine bubbles is introduced into the wastewater treatment apparatus 21. Here, including fine air in the waste water pre-treats the waste water with fine bubbles, and new waste water containing new fine bubbles is introduced into the waste water treatment device 21. And the new waste_water | drain containing this fine bubble influences each process process in the waste water treatment apparatus 21, and will improve process efficiency. That is, the wastewater treatment device 21 is configured by any one of a biological treatment process, a chemical treatment process, and a physical treatment process, or a combination of these processes, and the fine bubbles in the wastewater have different degrees of influence. All the processes are affected and the processing efficiency can be improved.

(Sixth embodiment)
Next, FIG. 6 shows a sixth embodiment of the present invention. The sixth embodiment differs from the fifth embodiment described above in that the waste water treatment device 21 in the fifth embodiment of FIG. 5 is a biological treatment device 22. Therefore, in the sixth embodiment, the same parts as those of the above-described fifth embodiment are denoted by the same reference numerals, detailed description thereof is omitted, and parts different from the fifth embodiment are described.

  In the sixth embodiment, as in the fifth embodiment described above, the waste water is pretreated with fine bubbles to form new waste water containing new fine bubbles, and the waste water is in a state containing fine bubbles. Installed in the processing device 22.

  The fine bubbles contained in the wastewater can greatly increase the activity of microorganisms in the biological treatment apparatus 22 for biologically treating the wastewater, and can greatly improve the treatment efficiency by the microorganisms. Specifically, the quality of treated water can be improved, the aeration tank can be operated with a smaller size than before, the number of operated aeration blowers can be reduced, and a surfactant that has not been able to decompose microorganisms conventionally, Improvements such as the ability to decompose even organic fluorine compounds and organic chlorine compounds can be realized.

(Seventh embodiment)
Next, FIG. 7 shows a seventh embodiment of the present invention. The seventh embodiment differs from the fifth embodiment described above in that the waste water treatment device 21 in the fifth embodiment of FIG. 5 is a chemical treatment device 23. Therefore, in the seventh embodiment, the same parts as those of the above-described fifth embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and parts different from those of the fifth embodiment will be described.

  In the seventh embodiment, as in the fifth embodiment, the waste water is pretreated with fine bubbles to form new waste water containing new fine bubbles, and the waste water is chemically treated in a state containing the fine bubbles. Installed in the processing device 23.

  The fine bubbles contained in the waste water act to catalyze a chemical reaction in the chemical treatment apparatus 23 that chemically treats the waste water, thereby greatly increasing the reaction promoting property. Therefore, the processing efficiency in chemical processing can be greatly improved. Specifically, the quality of water treated by chemical treatment can be improved, the size of the chemical reaction tank can be made smaller than before, the stirring intensity of the stirrer can be reduced, and low concentration chemistry that could not be chemically treated conventionally. Improvements such as the ability to process substances can be realized.

(Eighth embodiment)
Next, FIG. 8 shows an eighth embodiment of the present invention. The eighth embodiment differs from the fifth embodiment described above in that the waste water treatment device 21 in the fifth embodiment in FIG. 5 is a physical treatment device 24. Therefore, in the eighth embodiment, the same parts as those of the above-described fifth embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and parts different from those of the fifth embodiment will be described.

  In the eighth embodiment, as in the fifth embodiment, the waste water is pretreated with fine bubbles to form new waste water containing new fine bubbles, and the waste water is physically contained in a state containing fine bubbles. Installed in the processing device 24.

  The fine bubbles contained in the waste water can greatly improve and improve the physical processability in the physical processing device 24 that physically treats the waste water, thereby greatly improving the processing efficiency in the physical processing. Specifically, the quality of treated water can be improved, the size of the physical treatment tank can be made smaller than before, and a substance that has not been physically treated can be treated.

  As a more specific example, since the waste water contains organic substances, there are cases where the dehydration is poor. In this case, if this waste water is treated with fine air over a long period of time and then applied to a dehydrator as new waste water containing fine air, waste water that could not be dehydrated conventionally can be dehydrated.

  In addition, as said physical processing apparatus, the apparatus which performs all the physical processings, such as a general filtration apparatus, a membrane filtration apparatus, a dehydration apparatus, an adsorption apparatus, a precipitation apparatus, an extraction apparatus, a crystallization apparatus, corresponds as a specific example.

(Ninth embodiment)
Next, FIG. 9 shows a ninth embodiment of the present invention. The ninth embodiment differs from the fifth embodiment described above in that the waste water treatment device 21 in the fifth embodiment of FIG. 5 is a deep biological treatment tank 25. Therefore, in the ninth embodiment, the same parts as those of the above-described fifth embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and different parts from the fifth embodiment will be described.

  In the ninth embodiment, as in the fifth embodiment described above, the waste water is pretreated with fine bubbles to form new waste water containing new fine bubbles, and the waste water is deep in a state containing the fine bubbles. It introduce | transduces into the tank biological treatment tank 25. FIG. Drainage (treated water) containing fine bubbles from the fine bubble confirmation tank 15 is introduced from the upper part of the lower introduction pipe 26 and introduced into the lower part of the deep biological treatment tank 25.

  This deep biological treatment tank 25 is filled with a polyvinylidene chloride filler 31 as a filler for culturing microorganisms at a high concentration. The deep biological treatment tank 25 includes a submerged film 27 for securing treated water by membrane filtration, a gravity drain pipe 28 through which the treated water flows out, and a blower for washing the submerged film 27 with air. A diffuser pipe 29 connected to the pipe 30 is installed. The gravity drainage pipe 28 causes the treated water from the submerged film 27 to flow out using gravity (water head difference).

  Further, the activity of various microorganisms existing in the deep biological treatment tank 25 is enhanced by the fine bubbles contained in the water to be treated introduced from the lower introduction pipe 26 to the lower part of the deep biological treatment tank 25, and various microorganisms Can improve the processing efficiency. Further, the submerged membrane 27 is also prevented from being blocked by the membrane cleaning power of fine air, and the amount of permeated water is increased.

(Tenth embodiment)
Next, FIG. 10 shows a tenth embodiment of the present invention. The tenth embodiment differs from the first embodiment described above in that a fine bubble confirmation tank 15F is provided instead of the fine bubble confirmation tank 15 in the first embodiment of FIG. Therefore, in the tenth embodiment, the same parts as those in the first embodiment described above are denoted by the same reference numerals and detailed description thereof will be omitted, and parts different from those in the first embodiment will be described.

  The fine bubble confirmation tank 15F included in the tenth embodiment includes a fine air confirmation unit 34 for confirming the generation of fine bubbles, and a micro / nano bubble generation unit 35 partitioned by a partition unit 39 with respect to the fine air confirmation unit 34. And have. In the fine bubble confirmation tank 15F, the fine air confirmation unit 34 is disposed on the front side, and the micro / nano bubble generation unit 35 is disposed on the rear side.

  The micro / nano bubble generator 35 has a micro / nano bubble generator 32, and an air suction pipe L 30 and a water supply pipe L 40 are connected to the micro / nano bubble generator 32. An air flow rate adjusting valve 30 is connected to the air suction pipe L30. Further, the water supply pipe L <b> 40 is connected to the micro / nano bubble generating unit 35 via the circulation pump 33. The circulation pump 33 supplies the liquid in the micro / nano bubble generator 35 to the micro / nano bubble generator 32 from the water supply pipe L40.

  In the tenth embodiment, the liquid containing the fine bubbles generated by the swirling flow at the location of the impeller rotating portion 11 of the submerged pump 10 disposed in the fine bubble generating tank 6 is the fine bubble confirmation tank 15F. Part 34 is introduced. In the fine bubble confirmation part 34 of this fine bubble confirmation tank 15F, it adjusts so that the generation | occurrence | production state of a fine bubble may become the optimal. Adjustment of the generation state of the fine bubbles is performed by adjusting the opening degree of the valve 12 or by operating or not operating the metering pump 14.

  Then, the liquid containing the fine bubbles from the fine bubble confirmation unit 34 is introduced into the micro / nano bubble generation unit 35. In the micro / nano bubble generating unit 35, the micro / nano bubbles generated by the micro / nano bubble generator 32 are further mixed with the liquid containing fine bubbles. In this way, a liquid in which fine bubbles and micro / nano bubbles are sufficiently mixed is introduced into the next process device 17. In addition, the code | symbol 9D has shown the liquid level in the fine bubble confirmation tank 15F.

  In this embodiment, the generation of fine bubbles can be confirmed by the fine bubble confirmation unit 34, and the generation of micro / nano bubbles can be confirmed by the micro / nano bubble generation unit 35. That is, generation of fine bubbles and generation of micro / nano bubbles can be confirmed in separate sections. For example, by producing a predetermined portion of the tank wall of the microbubble confirmation tank 15F with a transparent material (for example, a transparent resin), it is possible to visually confirm the occurrence of microbubbles and micro / nano bubbles. Therefore, it is possible to introduce a liquid containing fine bubbles and micro / nano bubbles into the next process device 17 and to optimize the entire system and improve the efficiency. That is, a synergistic effect with respect to various liquid treatments by both fine bubbles and micro / nano bubbles can be expected, and the degree of influence by bubbles in the next process device 17 increases.

(Experimental example)
An experimental apparatus corresponding to the liquid processing apparatus of the first embodiment shown in FIG. 1 was manufactured. In this experimental apparatus, the capacity of the stock solution tank 1 is 300 liters, the capacity of the triangular weir liquid tank 4 is 10 liters, the capacity of the fine bubble generating tank 6 is 40 liters, and the capacity of the microbubble confirmation tank 15 is 50 liters. did.

  After the trial run of this experimental apparatus for about 2 days, the wastewater discharged from the semiconductor factory is treated as water to be treated, and is sequentially fed from the stock solution tank 1 to the triangular weir liquid tank 4, the fine bubble generation tank 6, and the fine bubble confirmation tank 15. Introduced. The dissolved oxygen concentration in the wastewater introduced into the stock solution tank 1 was measured and found to be 0 ppm. On the other hand, after the operation of this experimental apparatus for 3 days, after waiting for the water quality to stabilize, the dissolved oxygen concentration of the water to be treated derived from the outlet of the microbubble confirmation tank 15 was measured, and it was 6 ppm. .

  In addition, in the said embodiment, although the water tank 4 which drops a liquid naturally provided with the triangular weir 4A, the water tank 4 may be provided with the weir of another shape instead of the triangular weir 4A. Further, the liquid treatment method and the liquid treatment apparatus of the present invention are used not only in the water treatment field, but also in a field for treating liquids other than water, for example, alcohol fermentation, brewing beer and the like, and a wide range of liquid treatments such as pharmaceutical production. Is possible.

It is a figure which shows typically 1st Embodiment of the liquid processing apparatus of this invention. It is a figure which shows typically 2nd Embodiment of the liquid processing apparatus of this invention. It is a figure which shows typically 3rd Embodiment of the liquid processing apparatus of this invention. It is a figure which shows typically 4th Embodiment of the liquid processing apparatus of this invention. It is a figure which shows typically 5th Embodiment of the liquid processing apparatus of this invention. It is a figure which shows typically 6th Embodiment of the liquid processing apparatus of this invention. It is a figure which shows typically 7th Embodiment of the liquid processing apparatus of this invention. It is a figure which shows typically 8th Embodiment of the liquid processing apparatus of this invention. It is a figure which shows typically 9th Embodiment of the liquid processing apparatus of this invention. It is a figure which shows typically 10th Embodiment of the liquid processing apparatus of this invention.

Explanation of symbols

1 Stock solution tank 2 Pump
3 Valve 4 Triangular weir liquid tank 5 Liquid 6 Fine bubble generation tank 7 Bubble 8 Mixture of liquid and air 9A to 9D Liquid level 10 In-liquid pump 11 Impeller rotating part 12 Valve 13 Fine bubble generation auxiliary tank 14 Metering pump 15, 15F Fine bubble confirmation tank 16 Fine bubble 17 Next process equipment 18 Biological reaction equipment 19 Chemical reaction equipment 20 Physical treatment equipment 21 Wastewater treatment equipment 22 Biological treatment equipment 23 Chemical treatment equipment 24 Physical treatment equipment 25 Deep biological treatment tank 26 Lower introduction pipe 27 Submerged membrane 28 Gravity drain pipe 29 Aeration pipe 30 Blower 31 Polyvinylidene chloride filler 32 Micro-nano bubble generator 33 Circulation pump 34 Micro-bubble confirmation part 35 Micro-nano bubble generation part

Claims (17)

A first step of allowing the liquid to fall naturally and introducing a mixture of the liquid and air resulting from the natural fall into a fine bubble generating tank having a pump;
Operate the pump of the fine bubble generation tank, generate fine bubbles in the liquid in the fine bubble generation tank, and introduce the mixture containing the fine bubbles and the liquid into the fine bubble confirmation tank, A second step of confirming the state of occurrence of fine bubbles in the liquid;
A third step of introducing a mixture containing the fine bubbles and the liquid from the fine bubble confirmation tank into the next process device after confirming the generation state of the fine bubbles in the second step. Liquid processing method. A liquid tank for storing a predetermined amount of the introduced liquid and allowing the stored liquid to fall naturally;
A fine bubble generating tank in which a mixture of liquid and air by natural fall is introduced from the liquid tank and a pump is installed and fine bubbles are generated in the mixture by operation of the pump;
A liquid processing apparatus comprising: a fine bubble confirmation tank capable of confirming a generation state of fine bubbles in the mixture while the mixture containing the fine bubbles is introduced from the fine bubble generation tank. The liquid processing apparatus according to claim 2.
The liquid tank is
A liquid processing apparatus comprising a weir that causes a stored liquid to overflow and naturally drop. The liquid processing apparatus according to claim 2.
The pump which the said fine bubble generation tank has has the pumping capacity more than pumping the mixture of the said introduced liquid and air, The liquid processing apparatus characterized by the above-mentioned. The liquid processing apparatus according to claim 2.
The liquid processing apparatus is characterized in that the pump is a submerged pump. The liquid processing apparatus according to claim 2.
A liquid processing apparatus, comprising: a fine bubble generating auxiliary agent adding unit for adding a fine bubble generating auxiliary agent to the liquid stored in the liquid tank. The liquid processing apparatus according to claim 6.
The liquid processing apparatus according to claim 1, wherein the fine bubble generation aid is a combination of one or more substances selected from surfactants, alcohols and salts. The liquid processing apparatus according to claim 2.
A liquid processing apparatus comprising a biological reaction apparatus as a next process apparatus into which the mixture containing the fine bubbles is introduced from the fine bubble confirmation tank. The liquid processing apparatus according to claim 2.
A liquid processing apparatus comprising a chemical reaction apparatus as a next process apparatus into which the mixture containing the fine bubbles is introduced from the fine bubble confirmation tank. The liquid processing apparatus according to claim 2.
A liquid processing apparatus comprising a physical processing apparatus as a next process apparatus into which the mixture containing the fine bubbles is introduced from the fine bubble confirmation tank. The liquid processing apparatus according to claim 2.
A liquid treatment apparatus comprising a wastewater treatment apparatus as a next process apparatus into which the mixture containing the fine bubbles is introduced from the fine bubble confirmation tank. The liquid processing apparatus according to claim 11.
The waste water treatment apparatus includes a biological treatment apparatus. The liquid processing apparatus according to claim 11.
The waste water treatment apparatus includes a chemical treatment apparatus. The liquid processing apparatus according to claim 11.
The waste water treatment apparatus includes a physical treatment apparatus. The liquid processing apparatus according to claim 2.
A deep biological treatment tank as a next process device into which the mixture containing the fine bubbles is introduced from the fine bubble confirmation tank;
The deep biological treatment tank is
A liquid processing apparatus comprising a polyvinylidene chloride filler and a submerged film. The liquid processing apparatus according to any one of claims 2 to 15,
One or more micro / nano bubble generators are installed in the fine bubble confirmation tank. The liquid processing apparatus according to any one of claims 2 to 15,
The microbubble confirmation tank
A fine bubble confirmation unit for confirming the generation of fine bubbles;
A liquid processing apparatus comprising: a micro / nano bubble generating section partitioned with respect to the fine bubble confirming section.

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