JP2019084472A - Method for decomposing hard-to-degrade organic compounds, decomposition apparatus used for the decomposing method, treatment liquid for decomposing hard-to-degrade organic compounds - Google Patents

Abstract

To provide the method of decomposing hard-to-degrade organic compounds capable of decomposing hard-to-degrade organic compounds efficiently, decomposing apparatus used in the decomposing method, and treatment liquid decomposing hard-to-degrade organic compounds.SOLUTION: In the method of decomposing the hard-to-degrade organic compound, fine bubbles are generated in the liquid substance containing the hard-to-degrade organic compound, and plasma is generated in the fine bubbles by a plasma generation mechanism to decompose the hard-to-degrade organic compound.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a technology for degrading persistent organic compounds.

  Patent Document 1 discloses, as a method of decomposing organic matter in water, an activated sludge method of decomposing pollutants mainly composed of organic matter contained in wastewater such as sewage by microorganisms such as bacteria, protozoa and metazoa etc. ing. In the activated sludge method, it is possible to remove the contaminants mainly composed of organic substances contained in the wastewater such as sewage from the wastewater by decomposition and absorption of microorganisms in the activated sludge. However, in the activated sludge method, decomposition of sludge takes time because decomposition relies on microorganisms, and excess sludge is generated in large amounts by converting sludge into microorganisms in the process of decomposition.

Moreover, the Fenton oxidation method which decompose | disassembles an organic chlorine compound etc. is known by reaction of iron salts, such as iron sulfate, and hydrogen peroxide as a decomposition method of organic substance. As shown in the following reaction, hydrogen peroxide, hydroxyl radicals by metal ions such as ferrous ions (OH ·) and hydroxy ions - it is decomposed into ^(OH).
H ₂ O ₂ + Fe ²⁺ → Fe ³⁺ + OH ⁻ + OH ···
The Fenton oxidation method is a method of oxidizing an organic substance by a highly oxidative hydroxy radical generated by the above reaction. The Fenton oxidation method is superior in terms of the efficiency of decomposition of organic matter and the need for a large facility. However, the Fenton oxidation method requires a large amount of transition metals such as iron and hydrogen peroxide, and generates a large amount of excess Fe ³⁺ as sludge.

Therefore, in recent years, as shown in Patent Document 2, a method of decomposing an organic substance by combining a Fenton oxidation method and a UV (Ultra Violet) is adopted. In Patent Document 2, Fe ³⁺ is brought into contact with solid iron, reduced to Fe ²⁺ and recycled to the Fenton oxidation method, and degradable organic substances are dechlorinated, UV oxidized or irradiated with ultraviolet rays emitted from a UV lamp. It is decomposed by radical reaction.

Further, Patent Document 3, a cathode and an anode disposed in the reaction vessel of the Fenton reaction, the Fe ³⁺ was electrochemically reduced to Fe ²⁺ by applying a voltage between the electrodes, a method of recycling is disclosed It is done.
Further, Patent Document 4 discloses an in-liquid plasma generator capable of stably generating in-liquid plasma in decomposing harmful substances in liquid using in-liquid plasma generated in liquid. ing.

JP, 2013-202579, A JP 2003-181474 JP, 2005-146344, A JP, 2008-66210, A

However, in the activated sludge method and the Fenton oxidation method as described above, the decomposition of persistent organic compounds such as dioxane does not proceed completely. Further, depending on the decomposition method combining the Fenton oxidation method of Patent Document 2 and UV, the decomposition proceeds on the surface of the persistent organic compound irradiated with UV, but the inside of the persistent organic compound to which the UV can not reach Then disassembly does not advance. Furthermore, in the decomposition method using the electrochemical method of Patent Document 3, there is a problem that control of the electrochemical reaction is difficult.
In addition, decomposition of the persistent organic compound using in-liquid plasma as in Patent Document 4 is not efficient because the reaction rate is very slow.
From such a thing, a highly degradable organic compound has high storage ability in the environment and the human body, and it is desired that it can be decomposed and processed.

  Then, this invention is made in view of the above-mentioned subject, and the purpose is the decomposition method of the hard-to-degrade organic compound which can perform decomposition of a hard-to-degrade organic compound efficiently, and is used for the decomposition method An object of the present invention is to provide a decomposition apparatus and a treatment liquid that decomposes a persistent organic compound.

The characterizing feature of the method for decomposing a hardly decomposable organic compound according to the present invention is
The present invention is characterized in that fine bubbles are generated in a liquid substance containing a hard-to-degrade organic compound, and plasma is generated in the fine bubbles by a plasma generation mechanism to decompose the hard-to-degrade organic compound.

According to the above feature configuration, the fine bubble is generated in the liquid substance containing the difficultly decomposable organic compound, and the plasma is generated in the fine bubble to generate active oxygen such as hydroxy radical and oxygen radical in the liquid substance. Let Such active oxygen can decompose the persistent organic compound in the liquid substance in a short time.
In addition, the inventors have found that the lifetime of active oxygen such as hydroxy radical in fine bubbles is longer than the lifetime of active oxygen in bubbles whose diameter is larger than that of fine bubbles. Therefore, it is believed that the contact time between the persistent organic compound and the active oxygen is prolonged, and the decomposition of the persistent organic compound is promoted.
As mentioned above, in the decomposition | disassembly method by this characteristic structure, a persistent organic compound can be decomposed | disassembled efficiently.

The characterizing feature of the method for decomposing a hardly decomposable organic compound according to the present invention is
The liquid substance containing the hard-to-degrade organic compound is stirred by a rotary blade to generate a bubble, and plasma is generated in the bubble by a plasma generation mechanism to decompose the hard-to-degrade organic compound.

  According to the above-mentioned feature configuration, the liquid substance containing the difficultly decomposable organic compound is locally in negative pressure state by being stirred by the rotor. In particular, when the liquid material flows along the rotational direction of the rotary blade, the rear side of the rotary blade is in a negative pressure state with respect to the rotational direction, and reduced pressure boiling (cavitation) occurs here. Therefore, bubbles (fine bubbles with a fine diameter) are generated due to reduced pressure boiling that occurs when the rotor stirs the liquid substance. By generating plasma in the fine bubble, active oxygen such as hydroxy radical and oxygen radical is generated in the liquid substance. Thereby, similarly to the above-described decomposition method, the degradable organic compound can be efficiently decomposed in a short time by the decomposition method according to the present feature configuration.

A further characteristic feature of the method for decomposing the difficult-to-degrade organic compound according to the present invention is
The liquid substance containing the difficultly decomposable organic compound is introduced into the wing chamber, and when the rotor rotates in the wing room, the liquid substance is agitated to generate air bubbles.

  According to the above-described feature configuration, the liquid substance is introduced into the limited space of the wing chamber and the rotor is rotated in the wing chamber, whereby the rotation of the rotor is efficiently transmitted to the liquid substance. When the liquid substance flows along the rotational direction of the rotary blade, the rear side of the rotary blade is in a negative pressure state with respect to the rotational direction, and pressure reduction boiling occurs here. Therefore, it is possible to efficiently stir the liquid substance by the rotary blade, to cause the boiling under reduced pressure, and to generate the air bubbles (fine bubbles with a fine diameter) efficiently.

A further characteristic feature of the method for decomposing the difficult-to-degrade organic compound according to the present invention is
The plasma generated by the plasma generation mechanism is a low temperature plasma.

  According to the above-described feature configuration, by generating plasma at a low temperature, energy consumption can be reduced as compared to the case of generating a high-temperature plasma at a high voltage.

A further characteristic feature of the method for decomposing the difficult-to-degrade organic compound according to the present invention is
The low temperature plasma is generated by glow discharge.

  According to the above feature configuration, by setting the discharge form of the plasma generation mechanism to glow discharge, plasma can be generated at low temperature and with high energy efficiency.

A further characteristic feature of the method for decomposing the difficult-to-degrade organic compound according to the present invention is
The plasma generation mechanism is to generate plasma by applying a voltage between the electrodes.

According to the above feature configuration, by applying a voltage between the electrodes, plasma is generated in the bubbles that are fine bubbles. In the plasma, molecules constituting the gas in the bubble are ionized to be separated into positive ions and electrons. These positive ions sputter the electrode to generate nanoparticles containing the elements constituting the electrode.
Therefore, in the liquid substance, fine bubbles as bubbles, active oxygen such as hydroxy radicals and oxygen radicals generated by plasma in the fine bubbles, and nanoparticles are present.
The inventors believe that not only active oxygen but also nanoparticles are involved in the decomposition of the persistent organic compound, and promotes the degradation of the persistent organic compound.

The characteristic configuration of the decomposable organic compound decomposition apparatus according to the present invention is
An introduction chamber to which a liquid substance containing a persistent organic compound is supplied;
A rotor that has a plurality of rotor blades and rotates around a predetermined central axis to agitate the liquid substance in the introduction chamber with the plurality of rotor blades to generate air bubbles;
A plasma generation mechanism for generating plasma in the bubbles;
In providing the

  According to the above-mentioned characteristic configuration, the liquid substance containing the difficultly decomposable organic compound introduced into the introduction chamber is agitated by the plurality of rotary blades provided on the rotor as the rotor rotates about the predetermined central axis. Ru. By this stirring, the liquid substance flows along the rotational direction of the plurality of rotary blades, and the rear side of the plurality of rotary blades becomes negative pressure in the rotational direction, and fine bubbles of fine bore diameter are generated as air bubbles. Active oxygen is generated in the liquid substance by generating plasma in the bubbles as the fine bubbles by the plasma generation mechanism. Thereby, similarly to the above-mentioned decomposition method, the hardly decomposable organic compound can be efficiently decomposed in a short time.

The characteristic constitution of the treatment liquid for decomposing the difficult-to-degrade organic compound according to the present invention is
A fine bubble is generated in the liquid substance by cavitation, and a plasma is generated in the fine bubble by a plasma generation mechanism to be processed and generated, and mixed with the difficultly decomposable organic compound.

According to the above feature configuration, the processing solution contains fine bubbles generated in the liquid substance and active oxygen such as hydroxyl radicals and oxygen radicals generated by plasma in the fine bubbles. When this treatment liquid is mixed with the hard-to-degrade organic compound, the hard-to-degrade organic compound is decomposed in a short time by active oxygen. Therefore, a difficultly decomposable organic compound can be efficiently decomposed | disassembled by using the process liquid by this characteristic structure.
In addition, since the bubbles in the processing solution are fine bubbles, the life of active oxygen in the fine bubbles is considered to be long. Therefore, it can be stored as a treatment liquid, and even after being stored for a predetermined period of time, the persistent organic compound can be decomposed.

It is a block diagram of a decomposition | disassembly apparatus. It is sectional drawing which shows the internal structure of suction stirring pump Y. It is sectional drawing in the III-III direction view of FIG. It is a disassembled perspective view which shows the internal structure of suction stirring pump Y. As shown in FIG. It is a schematic block diagram of a partition plate. It is explanatory drawing which shows the internal structure of a recirculation mechanism part. It is the result (measurement 1st time) of measuring the state from which methylene blue aqueous solution of initial stage pH 7 is decomposed with progress of time from light absorbency. It is a result (measurement 2nd time) of measuring absorbance after progressing about 1800 h, after processing methylene blue aqueous solution of initial pH 7 with a decomposition device for a predetermined period. It is the result (measurement 1st time) which measured the state which the methylene blue aqueous solution of initial stage pH 11 decomposed | disassembled with time progress from the light absorbency. It is a result (measurement 2nd time) of measuring absorbance after progressing about 1800 h, after processing methylene blue aqueous solution of initial pH 11 with a decomposition device for a predetermined period. It is the result (measurement 1st time) which measured the state from which the methylene blue aqueous solution of initial stage pH 3 is decomposed | disassembled with time progress from light absorbency. The methylene blue aqueous solution having an initial pH of 3 was treated with a decomposer for a predetermined period of time, and then the absorbance was measured after about 1300 hours (measurement 2).

First Embodiment
DETAILED DESCRIPTION OF THE INVENTION A method of decomposing hard-to-degrade organic compounds according to the present invention and an embodiment of a decomposing apparatus used for the decomposing method will be described with reference to the drawings.

(1) Overall Configuration As shown in FIG. 1, the decomposition apparatus 100 is an apparatus for decomposing a liquid substance R containing a persistent organic compound to be described later. The decomposition apparatus 100 includes a liquid substance supply unit X that supplies the liquid substance R, a suction stirring pump Y that suctions and stirs the liquid substance R supplied from the liquid substance supply unit X under negative pressure, and a suction stirring pump Y by cavitation. The plasma generation mechanism Z for generating plasma in bubbles generated in the liquid substance R discharged from the nozzle, and at least a part of the liquid substance R discharged from the suction / stirring pump Y on the downstream side of the plasma generation mechanism Z And a recirculating mechanism 70 for circulating and supplying the stirring pump Y.
In the following, the term "decomposition" means that a persistent organic compound is decomposed into harmless substances. In addition, decomposition includes decomposition of persistent organic compounds into predetermined substances that can be decomposed into harmless substances. The decomposed substance can be present in the liquid substance R in a dissolved or dispersed state. For example, the hard-to-degrade organic compound can be decomposed and dispersed in the liquid substance R as carbon.

(2) Configuration of Each Part The configuration of each part of the decomposition apparatus 100 will be described below.
(2-1) Liquid Substance Supply Unit As shown in FIG. 1, the liquid substance supply unit X continuously supplies the liquid substance R stored in the storage tank 51 to the first supply unit 11 of the suction / stirring pump Y. It is configured to
Specifically, the liquid substance supply unit X stores the liquid substance R supplied via the liquid substance supply pipe 51R, and is provided with a storage tank 51 for delivering the liquid substance R and a delivery pump 52P, and the liquid from the storage tank 51 is provided. A feed pipe 52 for delivering the substance R, a flow control valve (not shown) for adjusting the flow rate of the liquid substance R delivered from the storage tank 51 to the feed pipe 52 to a set flow rate, a suction stirring pump Y And an introduction mechanism 60 connected to the first supply unit 11.

  Further, in the storage tank 51, a stirring blade 51K for stirring the liquid substance R in the storage tank 51 is provided. Further, in the storage tank 51, an inlet / outlet pipe 51G of air (gas) G for holding the inside of the storage tank 51 at atmospheric pressure is provided, for example, in the upper part of the storage tank 51. In addition, a discharge path 53 of the decomposed liquid substance R is connected to the storage tank 51.

(2-2) Suction / Stirring Pump Next, the suction / stirring pump Y will be described based on FIGS. 1 to 5.
As shown in FIG. 2, the suction / stirring pump Y includes a casing 1 provided with a cylindrical outer peripheral wall 4 whose both end openings are closed by the front wall 2 and the rear wall 3. The suction / stirring pump Y has a rotor 5 concentrically and rotatably provided inside the casing 1 and a cylindrical shape concentrically disposed inside the casing 1 and fixed to the front wall portion 2. A stator 7 and a pump drive motor M for rotationally driving the rotor 5 are provided.

As also shown in FIG. 3, on the radially outer side of the rotor 5, a plurality of rotary wings 6 project forward on the front wall 2 side (left side in FIG. 2), and in the circumferential direction It is provided integrally with the rotor 5 in a state of being arranged at equal intervals.
The cylindrical stator 7 is provided with a plurality of first and second through holes 7a and 7b, which become throttle channels, arranged in the circumferential direction. The stator 7 is fixed to the front wall portion 2 so as to be positioned on the front side (left side in FIG. 2) of the rotor 5 and on the inner side in the radial direction of the rotary wings 6. And, between the stator 7 and the outer peripheral wall 4 of the casing 1, an annular wing chamber 8 which also serves as a discharge chamber and around which the rotary wing 6 revolves is formed.

As shown in FIGS. 2 to 4, the first supply unit 11 for suctioning and introducing the liquid substance R into the interior of the casing 1 by the rotation of the rotary wing 6 through the introduction mechanism 60 is the central axis of the front wall 2 It is provided at a position shifted to the outer peripheral side than (the axial center A3 of the casing 1).
As shown in FIGS. 2 and 4, an annular groove 10 is formed on the inner surface of the front wall 2 of the casing 1, and the first supply portion 11 is provided in communication with the annular groove 10.

  As shown in FIG. 2 and FIG. 3, the cylindrical discharge portion 12 for discharging the liquid substance R is tangential to the outer peripheral wall 4 at one place in the circumferential direction of the cylindrical outer peripheral wall 4 of the casing 1. And in communication with the wing chamber 8.

  As shown in FIGS. 1, 2 and 6, in this embodiment, the liquid substance R discharged from the discharge unit 12 is supplied to the recirculation mechanism unit 70 via the discharge passage 18. A second supply portion 17 is provided at a central portion (concentric with the axis A3) of the front wall portion 2 of the casing 1. The second supply unit 17 mixes the liquid substance R, of which the air bubbles are separated in the cylindrical container 71 as the separation unit of the recirculation mechanism 70, in the casing 1 via the circulation channel 16. Circulating supply.

  Further, as shown in FIGS. 2 to 4, the inner peripheral side of the stator 7 is divided by the partition plate 15 into a first introduction chamber 13 on the front wall 2 side and a second introduction chamber 14 on the rotor 5 side. ing. The partition plate 15 is provided on the front side of the rotor 5 so as to rotate integrally with the rotor 5. And the scraping wing | blade 9 is provided in the front wall part 2 side of the partition plate 15. As shown in FIG. A plurality of scraping blades 9 are provided concentrically at equal intervals in the circumferential direction (four but not limited to this in FIG. 4). Each scraping blade 9 is disposed so as to be able to rotate integrally with the rotor 5 in a state in which the tip end portion 9T is advanced into the annular groove 10.

The first introduction chamber 13 and the second introduction chamber 14 are configured to be in communication with the wing chamber 8 via the plurality of first and second through holes 7 a and 7 b of the stator 7. The first supply unit 11 is in communication with the first introduction chamber 13, and the second supply unit 17 is in communication with the second introduction chamber 14.
Specifically, the first introduction chamber 13 and the wing chamber 8 communicate with each other through a plurality of first through holes 7 a arranged at equal intervals in the circumferential direction at a portion of the stator 7 facing the first introduction chamber 13. It is done. Further, the second introduction chamber 14 and the wing chamber 8 are communicated with each other through a plurality of second through holes 7 b disposed at equal intervals in the circumferential direction at a portion of the stator 7 facing the second introduction chamber 14. .

Descriptions of each part of the suction / stirring pump Y will be added.
As shown in FIG. 2, the rotor 5 is configured in such a manner that its front surface is expanded in a substantially truncated cone shape. A plurality of rotary wings 6 are provided on the outer peripheral side of the rotor 5 at equal intervals in a state of projecting forward. In FIG. 3, ten rotor blades 6 are disposed at equal intervals in the circumferential direction. Further, the rotary wings 6 are formed so as to protrude from the outer peripheral side of the rotor 5 to the inner peripheral side so as to be inclined rearward in the rotational direction from the inner peripheral side toward the outer peripheral side. The angle between the rotary wing 6 and the moving direction (rotational direction) of the rotary wing 6 is preferably, for example, 10 ° or more and 80 ° or less. In this embodiment, the angle is set to 30 ° as an example (see FIG. 3). The inner diameter of the tip portion of the rotary wing 6 is formed slightly larger than the outer diameter of the stator 7.

The rotor 5 is connected to a drive shaft 19 of a pump drive motor M inserted into the casing 1 through the rear wall 3 in a state where the rotor 5 is positioned concentrically with the casing 1. The rotor 5 is rotationally driven by the pump drive motor M.
The rotor 5 is rotationally driven in such a direction that the tip of the rotary blade 6 is on the front side in the axial direction view (III-III direction view of FIG. 2 as shown in FIG. 3). A so-called reduced pressure boiling (cavitation) is generated on the rear surface (rear surface) 6a in the rotational direction.
In the rotor 5, the rotors 6 are provided radially outward with a large centrifugal force due to rotation about an axis A3 which is a predetermined central axis. By stirring the liquid substance with the rotary blade 6 at a location where the centrifugal force applied to the liquid substance R is large, the liquid substance can be stirred faster and sufficiently than when the liquid substance R is stirred inside in the radial direction. This can promote the occurrence of fine bubbles.

  In addition, a fine bubble is a bubble of 100 micrometers or less in diameter. Fine bubbles include micro bubbles having a diameter of 1 to 100 μm and ultra fine bubbles having a diameter of 1 μm or less. At the back surface 6 a of the rotary blade 6, fine bubbles are generated as air bubbles due to reduced pressure boiling (cavitation). Preferably, microbubbles (1 to 100 μm in diameter) are generated as air bubbles, and more preferably ultrafine bubbles (1 μm or less in diameter) are generated. More preferably, among the ultra fine bubbles (1 μm or less in diameter), air bubbles with a fine aperture of 1 nm or less can be generated as the bubbles. In particular, the ultrafine bubbles (diameter: 1 μm or less) are non-visible bubbles, and the liquid substance R containing the bubbles is substantially colorless and transparent without any clouding caused by the bubbles. The bubbles generated are not limited to one type, and may be a mixture of fine bubbles of any diameter. For example, the generated bubbles include at least one of microbubbles and ultrafine bubbles.

  As shown in FIGS. 2, 4 and 5, the partition plate 15 is formed in a generally funnel shape having an outer diameter slightly smaller than the inner diameter of the stator 7. Specifically, the funnel-shaped partition plate 15 is provided at its central portion with a funnel-shaped portion 15b opened at a cylindrical sliding contact portion 15a whose top projects in a cylindrical shape. Further, the partition plate 15 is provided with an annular flat plate portion 15c on the outer peripheral portion of the funnel-shaped portion 15b, in which both the front and rear surfaces are orthogonal to the axial center A3 of the casing 1.

  Then, as shown in FIG. 2, FIG. 3 and FIG. 4, the partition plate 15 is equally spaced in the circumferential direction, with the cylindrical sliding contact portion 15a at the top facing the front wall 2 side of the casing 1. It is attached to the attaching part 5a of the front surface of the rotor 5 via the space | interval holding member 20 arrange | positioned by several places (it is not limited to this but this embodiment four places).

  As shown in FIGS. 2, 3 and 5 (iii), when the partition plate 15 is attached to the rotor 5 via the spacing members 20 at a plurality of locations, the stirring blade 21 is a rear wall portion of the casing 1. It is integrally assembled to the partition plate 15 in a posture directed to the 3 side. Then, when the rotor 5 is rotationally driven, the four stirring blades 21 are configured to rotate integrally with the rotor 5. The number of stirring blades 21 is not limited to four, and may be two, three, five or more, for example.

  As shown in FIG. 2 and FIG. 4, in this embodiment, a cylindrical second supply portion 17 is provided concentrically with the casing 1 at the central portion of the front wall portion 2 of the casing 1. The second supply portion 17 is formed smaller in diameter than the inner diameter of the circulation flow passage 16 and smaller in diameter than the cylindrical sliding contact portion 15 a of the partition plate 15, thereby forming a narrowed portion 14 a having a small flow passage area. It is done. The rotation of the rotor 6 of the rotor 5 causes the liquid substance R to be discharged through the discharge part 12 and the liquid substance R to be introduced through the throttling part 14 a of the second supply part 17. The pressure in the stirring pump Y is reduced.

  As shown in FIGS. 2 to 4, the first supply portion 11 has the casing 1 in a state in which the opening (inlet portion) opened in the casing 1 includes a part in the circumferential direction of the annular groove 10 inside. It is provided in the front wall part 2 so that it may be located in the side of the opening part of the 2nd supply part 17 with respect to the inside. Further, in the first supply unit 11, in a plan view (vertical view in FIG. 1 and FIG. 2), the axial center A2 is parallel to the axial center A3 of the casing 1 and horizontal direction orthogonal to the axial center A3 of the casing 1 1 and 2, the front wall 2 of the casing 1 is inclined downward so that the axis A2 approaches the center A3 of the casing 1 as the axis A2 approaches the front wall 2 of the casing 1. Provided in In addition, the downward inclination angle with respect to the horizontal direction (left and right direction of FIG.1 and FIG.2) of the 1st supply part 11 is about 45 degree | times, for example.

  As shown in FIGS. 2 and 4, the stator 7 is attached to the inner surface (the surface facing the rotor 5) of the front wall 2 of the casing 1 so that the front wall 2 of the casing 1 and the stator 7 are integrated. It is fixed to become. In the stator 7, the plurality of first through holes 7 a disposed in a portion facing the first introduction chamber 13 are formed in a substantially circular shape. The total flow area of the plurality of first through holes 7 a is set to be smaller than the flow area of the first introduction chamber 13. Further, the plurality of second through holes 7 b disposed in a portion facing the second introduction chamber 14 are formed in a substantially elliptical shape. The total flow area of the plurality of second through holes 7 b is set to be smaller than the flow area of the second introduction chamber 14. When the rotor 6 of the rotor 5 rotates, the liquid substance R is discharged through the discharge part 12, and the fluid substance R communicates with the discharge part 12 through the first through hole 7 a of the first introduction chamber 13. While being supplied to the chamber 8 and the liquid substance R being introduced into the wing chamber 8 via the second supply unit 17, the inside of the suction and stirring pump Y is depressurized.

  As shown in FIGS. 4 and 5, in this embodiment, each scraping blade 9 is formed in a rod shape. Each scraping blade 9 is positioned closer to the front wall portion 2 as the tip end side of the rod-like scraping blade 9 in the radial direction of the rotor 5 (view in the front and back direction in FIG. 5 (iii)) The rod-like scrapings are inclined in such a manner that they are positioned on the radially inward side of the rotor 5 as the tip end side of the bar-like scraping blade 9 in the axial center direction view of 5 (view in FIG. The base end 9 B of the wing 9 is fixed to rotate integrally with the rotor 5. Then, the rotor 5 rotates in the direction (the direction indicated by the arrow in FIGS. 2 to 5) in which the tip of the scraping blade 9 is on the front side in the axial center direction view (view in FIG. It is driven.

Description of the scraping blade 9 will be added based on FIGS. 3 to 5.
The scraping blade 9 has a proximal end 9B fixed to the partition plate 15, an intermediate portion 9M exposed to the first introduction chamber 13, and a distal end inserted into the annular groove 10 (that is, enters). It is configured in a rod shape with a series of 9T from the proximal end to the distal end.

As shown in FIG. 3, FIG. 4, and FIG. 5 (ii), the base end 9B of the scraping blade 9 is formed in a substantially rectangular plate shape.
As shown in FIG. 3, FIG. 4, FIG. 5 (i) and (ii), the middle portion 9M of the scraping blade 9 is formed in a substantially triangular prism shape whose cross-sectional shape is substantially triangular (in particular, See Figure 3). And, by providing the scraping blade 9 in the inclined posture as described above, one side surface 9m facing the front side in the rotational direction of the rotor 5 among the three side surfaces of the middle portion 9M of triangular column (hereinafter referred to as a dissipation surface There is a case where the rotor 5 is inclined forward toward the front in the rotational direction of the rotor 5 and is directed downward in the radial direction with respect to the radial direction of the rotor 5 (hereinafter referred to as obliquely outward) (In particular, see FIGS. 4 and 5).

  That is, by providing the rod-like scraping blade 9 in the inclined posture as described above, the tip portion 9T of the scraping blade 9 in which the intermediate portion 9M exposed to the first introduction chamber 13 is fitted into the annular groove 10. The rotor 5 is located radially outward of the rotor 5. Further, the diffusion surface 9m of the middle portion 9M facing the front side in the rotational direction is in the form of a forward and downward sloping toward the front side in the rotational direction of the rotor 5, and is inclined diagonally outward with respect to the radial direction There is. As a result, the liquid substance R scraped out of the annular groove 10 by the tip 9 T of the scraping blade 9 is the diameter of the rotor 5 in the first introduction chamber 13 by the diffusion surface 9 m of the middle portion 9 M of the scraping blade 9. It is guided to flow outward in the direction.

  As shown in FIG. 4, FIG. 5 (i) and (ii), the tip 9T of the scraping blade 9 has a substantially square pole shape whose cross-sectional shape is substantially rectangular. Further, at the tip end portion 9T, in the axial center direction view of the rotor 5 (view in the front and back direction of the paper surface of FIG. 5I), the outwardly facing side surface 9o of the four side surfaces facing radially outward 10 along an inwardly directed inner surface facing radially inward on the inner surface of 10; Furthermore, in the tip portion 9T, it is configured in an arc shape in which the inward side surface 9i of the four side surfaces radially inward of the rotor 5 is along the outward inner surface facing the radially outer side of the inner surface of the annular groove 10. It is done.

The scraping surface 9f of the four side surfaces of the rectangular column-shaped tip 9T facing the front side in the rotational direction of the rotor 5 is in the form of a downward sloping shape inclined toward the front side in the rotational direction of the rotor 5, and the diameter of the rotor 5 It is configured to be directed radially outward with respect to the direction (hereinafter, sometimes referred to as oblique outward).
As a result, the liquid substance R scraped out of the annular groove 10 by the tip 9 T of the scraping wing 9 is directed radially outward of the rotor 5 by the scraping surface 9 f of the tip 9 T of the scraping wing 9 It will be discharged into the first introduction chamber 13.
Furthermore, the tip end surface 9 t of the tip end 9 T of the scraping blade 9 is configured to be parallel to the bottom surface of the annular groove 10 in a state where the tip end 9 T is fitted into the annular groove 10.

  Further, when the rotor 5 is rotationally driven in such a direction that the tip of the scraping blade 9 is on the front side in the axial center direction view (view in the sheet surface and back surface direction of FIG. A surface (rear surface) 9a which is a rear side in the rotational direction is formed at each of 9B, the intermediate portion 9M, and the tip portion 9T.

  The four scraper blades 9 configured as described above are arranged in the circumferential direction at intervals of, for example, 90 degrees at the central angle in the inclined posture as described above, and each is a base end 9B is fixed to the annular flat plate portion 15c of the partition plate 15 and provided.

As shown in FIG. 2, the partition plate 15 provided with the scraping blade 9 is attached to the mounting portion 5 a of the front surface of the rotor 5 in a state of being separated from the front surface of the rotor 5 by the spacing member 20. The rotor 5 is disposed in the casing 1 in a state in which the cylindrical sliding contact portion 15 a of the partition plate 15 is slidably fitted in the second supply portion 17 so as to be rotatable.
As a result, a tapered second introduction chamber 14 is formed between the bulging front surface of the rotor 5 and the rear surface of the partition plate 15 so as to decrease in diameter toward the front wall 2 of the casing 1. Then, the second supply unit 17 communicates with the second introduction chamber 14 via the cylindrical sliding contact portion 15 a of the partition plate 15.
Further, an annular first introduction chamber 13 communicating with the first supply portion 11 is formed between the front wall portion 2 of the casing 1 and the front surface of the partition plate 15.

  Then, when the rotor 5 is rotationally driven, the partition plate 15 rotates integrally with the rotor 5 in a state where the cylindrical sliding contact portion 15 a is in sliding contact with the second supply portion 17. As described above, even when the rotor 5 and the partition plate 15 rotate, the second supply unit 17 is maintained in communication with the second introduction chamber 14 via the cylindrical sliding contact portion 15 a of the partition plate 15. It is done.

(2-3) Recirculation Mechanism Unit The recirculation mechanism unit (an example of the separation unit) 70 is configured to separate the liquid substance R in the cylindrical container 71. As shown in FIGS. 1 and 6, the recirculation mechanism unit 70 separates air bubbles from the liquid substance R supplied from the discharge unit 12 of the suction / stirring pump Y via the discharge passage 18, and part thereof (for example, The liquid substance R in an arbitrary ratio of 10 to 90% is separated into the circulation flow path 16, and the remaining liquid substance R is separated into the discharge path 22 together with the bubbles contained in the liquid substance R. The discharge passage 18 and the circulation passage 16 are respectively connected to the lower part of the cylindrical container 71, and the discharge passage 22 is connected to the storage tank 51 from a discharge part 73 formed in the upper part of the cylindrical container 71.

  Here, in the recirculation mechanism unit 70, as shown in FIG. 6, the introduction pipe 72 to which the discharge passage 18 is connected is disposed so as to protrude from the bottom surface of the cylindrical container 71 to the inside. The recirculation mechanism unit 70 includes a discharge unit 73 connected to the discharge passage 22 at the top of the cylindrical container 71 and a circulation unit 74 connected to the circulation passage 16 at the bottom. Furthermore, the recirculation mechanism unit 70 is configured by arranging a twisting plate 75 for swirling the flow of the liquid substance R discharged from the introduction pipe 72 at the discharge upper end of the introduction pipe 72. As a result, the liquid substance R which does not contain air bubbles is supplied into the second introduction chamber 14 through the circulation flow path 16.

(2-4) Control part Although the control part with which decomposition device 100 is equipped is not illustrated, it consists of publicly known arithmetic processing units provided with CPU, storage part, etc., Liquid substance supply part X which constitutes decomposition device 100, and suction The operation of each device such as the stirring pump Y can be controlled.
In particular, the control unit is configured to be able to control the rotational speed of the rotor 5. Alternatively, the peripheral speed of the rotor 6 can be controlled. The number of rotations of the rotor 5 (peripheral velocity of the rotary blades 6) can be set so that the pressure in the first introduction chamber 13 and the second introduction chamber 14 becomes a predetermined negative pressure state. The control unit sets the rotational speed of the rotor 5 to, for example, 4800 rpm or more, more preferably 6000 rpm or more, and still more preferably 7200 rpm or more so that a predetermined negative pressure state is achieved. In addition, the control unit sets the circumferential velocity of the rotary vane 6 to 6 to 80 m / s, more preferably 15 to 50 m / s, so as to attain a predetermined negative pressure state.

The control unit rotates the rotor 6 at the set rotation speed of the rotor 5 (the peripheral speed of the rotor 6) to at least the first through hole 7a and the second introduction chamber on the side of the first introduction chamber 13 of the stator 7. A region in the wing chamber 8 immediately after passing through the second through hole 7b on the 14 side is continuously formed over the entire circumference in the wing chamber 8 in which a large number of fine bubbles (fine bubbles) of the liquid substance R are generated. It can be formed as a bubble region.
That is, when the liquid substance is introduced into the limited space of the wing chamber 8 and the rotor 6 rotates in the wing chamber 8, the rotation by the rotor 6 is efficiently transmitted to the liquid substance. Then, the tip end of the rotary wing 6 is rotationally driven in the direction toward the front side, so that so-called pressure reduction boiling (cavitation) occurs on the surface (rear surface) 6a on the rear side in the rotational direction of the rotary wing 6. Therefore, the liquid substance R can be efficiently stirred by the rotary blade 6, and reduced pressure boiling can be generated to efficiently generate fine bubbles with a fine bore diameter.

  In order to form the fine bubble region over the entire circumference in the wing chamber 8, the control unit has, for example, the pressure in the outlet region of the first through hole 7a and the second through hole 7b (throttle through hole) of the stator 7 Set the number of revolutions of the rotor 5 (peripheral velocity of the rotary blade 6) so that the saturated vapor pressure of the liquid substance R (3.169 kPa for water of 25 ° C.) or less over the entire circumference of the outlet area. Can.

  Further, the control unit is configured such that the pressure of the liquid substance R in the discharge section 12 when each space partitioned by the rotary wings 6 of the wing chamber 8 communicates with the discharge section 12 is the saturated vapor pressure of the liquid substance R (water at 25 ° C. In this case, the number of rotations of the rotor 5 (the peripheral speed of the rotary blade 6) can be set to be 3.169 kPa or less. By rotating the rotor 5 (rotating blades 6) at the set rotation speed, a fine bubble region in which a large number of fine bubbles (fine bubbles) of the liquid substance R are generated is formed in the region immediately after passing the discharge unit 12 it can.

  Here, the pressure in the first introduction chamber 13 and the second introduction chamber 14 (in the present embodiment, the pressure in the first introduction chamber 13 (here, the first introduction chamber 13 and the second introduction chamber 14 A pressure gauge 80 is provided on the suction / stirring pump Y in order to measure approximately the same pressure.

(2-5) Plasma Generation Mechanism The plasma generation mechanism Z is disposed in the discharge passage 18 connected to the discharge portion 12 of the suction / stirring pump Y through which the liquid substance R passes.
As shown in FIG. 1 (ii), the plasma generation mechanism Z includes a pair of electrodes 81 supported by each of the pair of electrode support portions 81a, and a power supply 82 for applying a pulse voltage between the electrodes 81. There is. The pair of electrodes 81 is installed in the discharge passage 18 connecting the discharge portion 12 of the suction / stirring pump Y and the recirculation mechanism portion 70.

The pair of electrodes 81 may be any conductor that is stable in the liquid substance R containing a hardly decomposable organic compound, and may be made of a metal, a semiconductor, or a combination thereof.
The pair of electrodes 81 may be, for example, silver, copper, nickel, gold, aluminum, rhodium, tungsten, platinum, iron, chromium, tantalum, titanium, lithium, niobium, indium, as long as the pair of electrodes 81 is a stable conductor in the liquid substance R. An element selected from molybdenum, palladium, tin, lead, manganese, magnesium, zirconium, beryllium, yttrium, neodymium, scandium or the like, or an alloy containing the above-described element or an alloy film combining the above-described elements It can be formed of a metal material. The electrode 81 formed of such a metal material may have a single-layer structure or a laminated structure of two or more layers. For example, a single-layer structure of an aluminum film containing silicon, a two-layer structure in which a titanium film is stacked on an aluminum film, and a three-layer structure in which a titanium film, an aluminum film, and a titanium film are sequentially formed.

In addition, the pair of electrodes 81 may be formed of an oxide of the above-mentioned metal material on the condition that it is stable in the liquid substance R.
In addition, the pair of electrodes 81 may be a semiconductor on the condition that it is stable in the liquid substance R. For example, a single element composed of one element selected from silicon, germanium, selenium and the like It may be formed of a semiconductor. In addition, the pair of electrodes 81 may be formed of a compound semiconductor composed of a plurality of different elements. Examples of compound semiconductors include III-V semiconductors such as gallium arsenide, gallium phosphide and indium phosphide, II-VI semiconductors such as cadmium telluride, zinc selenide and zinc sulfide, and IV such as silicon carbide and silicon germanium -Group IV semiconductors can be mentioned. The crystal structure of such a semiconductor is not limited to a single crystal, and may be polycrystalline, microcrystalline and amorphous.

In addition, the pair of electrodes 81 may be an oxide semiconductor on the condition that it is stable in the liquid substance R. As such an oxide semiconductor, an oxide containing at least one of indium, gallium, or zinc can be mentioned. As an oxide semiconductor, indium gallium zinc oxide, indium gallium oxide, indium zinc oxide, zinc tin oxide, zinc oxide, and the like can be given, for example.
The semiconductor as described above may be formed by increasing the conductivity by excessively adding an impurity into the semiconductor.
In addition, the pair of electrodes 81 does not have to be a conductor as long as it functions as a conductor, and the inside of the electrode 81 is an insulator, a semiconductor or the like, and the insulator is surrounded by the conductor or the like. May be

  The plasma generation mechanism Z generates plasma in insulating fine bubbles by high-voltage dielectric breakdown discharge by pulse voltage. That is, the plasma generation mechanism Z ionizes (plasmatizes) air in the fine bubble to generate plasma.

At this time, the pulse voltage applied to the pair of electrodes 81 is, for example, ± 0.5 kV to ± 10 kV, more preferably ± 2 kV to ± 6 kV, and still more preferably ± 4 kV. The pulse width of the pulse voltage is, for example, 0.01 μs to 2 μs, more preferably 0.4 μs to 1.2 μs, and still more preferably 0.8 μs. Further, the repetition frequency of the pulse voltage is, for example, 0.1 kHz or more, more preferably 10 kHz or more, and further preferably 100 kHz or more.
The gap length of the pair of electrodes 81 is, for example, 0.1 mm to 10 mm, more preferably 0.5 mm to 5 mm, more preferably 0.5 mm to 2 mm, and still more preferably 1.0 mm. .

In this case, it is preferable that the discharge form generated by the pulse voltage is a glow discharge in which the electrode 81 is disposed opposite to the discharge path 18 through which the liquid substance R passes. Thereby, low temperature plasma can be generated efficiently. By generating the plasma at a low temperature, energy consumption can be reduced as compared with the case of generating a high voltage and high temperature plasma. At this time, the liquid substance R can be treated at a suitable liquid temperature by operating a cooling means provided in the decomposition apparatus 100, for example, a jacket cooling means (not shown) provided in the suction and stirring pump Y.
When the main component of the liquid substance R is water, the liquid substance R can be treated, for example, more preferably at a liquid temperature of 0 ° C. to 100 ° C., more preferably at a liquid temperature of 0 ° C. to 80 ° C. It can process, More preferably, it can process at the temperature of 5 degreeC-50 degreeC of liquid temperature.

  In addition, although the example of the suitable temperature for processing the liquid substance R in the case where the main component of the liquid substance R is water was mentioned above, the temperature suitable for processing the liquid substance R is the temperature for the liquid substance R It also differs depending on the freezing point and boiling point of the solvent. The preferred temperature for treating the liquid substance R also differs depending on the preset temperature of the chiller as the jacket cooling means (cooling means), the cooling capacity of the chiller, etc. Furthermore, for example, the electrode 81 of the plasma generation mechanism Z It also depends on the plasma conditions such as the material used for, gap length, pulse width and frequency. Therefore, although an example of the suitable temperature for processing the liquid substance R was given above, taking into account the preset temperature and cooling capacity of the chiller, such as the freezing point and boiling point of other solvents, plasma conditions, etc. A suitable temperature for treating the liquid substance R can be set as appropriate.

  By generating plasma in the fine bubble, active oxygen such as hydroxy radical and oxygen radical can be generated in the liquid substance R. Active oxygen such as hydroxy radical and oxygen radical is strong in oxidizing power, and in particular, hydroxy radical is the most reactive among active oxygen and the strongest in oxidizing power. Such active oxygen can decompose the persistent organic compound contained in the liquid substance R in a short time.

(3) Hard-to-degrade organic compound The hard-to-degrade organic compound is a compound which is hard to be degraded by methods such as an activated sludge method using a microorganism and a Fenton oxidation method. Examples of the hard-to-degrade organic compound include methylene blue, dioxane, and a compound having a benzene ring.
The following compounds are mentioned as an example of a persistent organic compound, for example.
Examples of the hard-to-degrade organic compound include aromatic compounds such as coplanar PCBs, polychlorinated biphenyls (PCBs), bisphenols, alkylphenols, halogenated phenols, phthalic esters, and benzophenones.
Moreover, as a persistent organic compound, environmental hormones, such as estradiol, are mentioned, for example.

Further, examples of the hard-to-degrade organic compound include aromatic hydrocarbon compounds such as benzene, toluene, xylene, naphthalene, anthracene, phenanthrene, pyrene, chrysene and benzopyrene.
Further, examples of the difficultly decomposable organic compound include aliphatic hydrocarbon compounds such as hexane and petroleum ether.

  Further, examples of the hard-to-degrade organic compound include halogenated organic compounds such as organic chlorine compounds including dioxins and chlorophenols. As the halogenated organic compound, for example, dichloromethane, chloroform, carbon tetrachloride, bromotrifluoromethane, bromochlorodifluoromethane, dibromodifluoromethane, dibromotetrafluoroethane, tribromofluoromethane, tetrachloroethylene, trichloroethylene, 1,1-dichloroethylene, 1,2-dichloroethylene, chloroethylene, hexachloroethane, 1,1,1-trichloroethane, 1,1,2-trichloroethane, 1,1-dichloroethane, 1,2-dichloroethane, 1,2-dichlorotetrafluoroethane, 1 , 3-dichloropropene, 2-chloro-1,3-butadiene and the like. Moreover, as a halogenated alicyclic compound among the halogenated organic compounds, for example, 1,2,3,4,5,6-hexachlorocyclohexane, aldodrin (Aldrin), dieldrin (Dieldrin), endrin (Endrin), chlordene (Chlorden), Heptachor (Heptachor), Mirex (Mirex), Toxaphene (Toxaphene). Further, among halogenated organic compounds, examples of halogenated aromatic compounds include dichlorodiphenyltrichloroethane (DDT), 2,4-dichlorophenol, 2,4,5-trichlorophenol, 2,4,6-trichlorophenol, Pentachlorophenol etc. are mentioned.

For example, the liquid substance R is prepared in a state in which the above-mentioned difficultly decomposable organic compound is dissolved in a solvent such as water, a state dispersed in a solvent, or a mixed state in which it is dissolved and dispersed. Be done. The solvent is not limited to water. For example, it is preferable that the solvent does not inhibit the decomposition of the persistent organic compound, and that the solvent itself is easy to decompose. The solvent is not limited to the following, but other than water, for example, an organic acid (eg, formic acid, dichloroacetic acid, methanesulfonic acid etc.), an organic base (eg, diazabicycloundecene (DBU), tetrabutylammonium hydroxide) Acidic aqueous solvents such as hydrochloric acid, nitric acid, phosphoric acid, hydrofluoric acid, acetic acid and sulfuric acid, sodium hydroxide aqueous solution, calcium hydroxide aqueous solution and water Alkaline aqueous solvents such as aqueous potassium oxide solution, alcohol solvents (eg, methanol, ethanol, n-propanol etc.), ketone solvents (eg, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone etc.), ether solvents (eg tetrahydrofuran) ,Propylene glycol Nomethyl ether, propylene glycol monomethyl ether acetate, etc., glycol solvents (ethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol etc.), sulfoxide solvents (eg, dimethyl sulfoxide, hexamethylene sulfoxide, sulfolane etc.), Ester solvents (eg, ethyl acetate, n-butyl acetate, ethyl lactate etc.), amide solvents (eg, N, N-dimethylformamide, 1-methyl-2-pyrrolidone etc.), aromatic hydrocarbon solvents (eg, For example, toluene, xylene, etc., aliphatic hydrocarbon solvents (eg, octane etc.), nitrile solvents (eg, acetonitrile etc.), halogen solvents (eg, carbon tetrachloride, dichloromethane etc.), ionic liquid For example, 1-ethyl-3-methylimidazolium tetrafluoroborate), carbon disulfide solvent or a mixture thereof, and the like.
The hard-to-degrade organic compound does not have to be completely dissolved in a solvent such as water, for example, and may be dispersed in the solvent.

In addition, as the liquid substance R, alkaline neutralizing agents such as sodium hydroxide, calcium hydroxide, sodium carbonate and potassium hydroxide, and acidic neutralizing agents such as hydrochloric acid, sulfuric acid, nitric acid, aluminum chloride, aluminum chloride polyaluminum chloride, etc. PH adjusters can be mixed. As the pH adjuster, for example, organic acids such as succinic acid, citric acid, tartaric acid and acetic acid and salts thereof, inorganic acids such as phosphoric acid and polyphosphoric acid and boric acid, salts thereof and the like can be used.
The pH of the liquid substance R may be any range of pH 1 to pH 14. However, in consideration of the degree of decomposition of the persistent organic compound in the liquid substance R with reference to the following experimental example, for example, the liquid substance R has a pH of 3 to 12 and more preferably 3 to 7 and more preferably 3 To pH 5, more preferably pH 3.

(4) Operation of Decomposition Device Next, the operation of the decomposition device 100 will be described.
First, the liquid substance R containing a persistent organic compound to be decomposed is supplied and stored in the storage tank 51 of the liquid substance supply unit X via the liquid substance supply pipe 51R.
Then, the rotor 5 is rotated while supplying the liquid substance R from the storage tank 51 of the liquid substance supply unit X, and the operation of the suction / stirring pump Y is continued for a predetermined time.

When the rotor 5 is rotationally driven and the partition plate 15 rotates integrally with the rotor 5, the scraping blade 9 concentrically provided on the partition plate 15 has the tip 9T fitted in the annular groove 10. Circulate in the state.
As a result, as shown by solid arrows in FIG. 2 and FIG. 3, the scraping blade which flows through the first supply portion 11 and is introduced into the annular groove 10 is fitted into the annular groove 10 and circulates. It is scraped out by the tip 9T of 9. In the rotational direction of the rotor 5, the scraped liquid substance R follows the front surface of the funnel-shaped portion 15 b of the partition plate 15 and the front surface of the annular flat portion 15 c in the first introduction chamber 13. It flows. Furthermore, the liquid substance R passes through the first through hole 7a on the side of the first introduction chamber 13 of the stator 7 to flow into the wing chamber 8, and flows in the rotational direction of the rotor 5 in the wing chamber 8 to discharge It is discharged from the part 12.

  The liquid substance R introduced into the annular groove 10 is subjected to a shearing action when scraped out by the tip 9 T of the scraping blade 9. In this case, between the outward facing side 9 o of the tip 9 T of the scraping wing 9 and the inward facing inner surface of the inner annular groove 10, and the inward facing side 9 i of the tip 9 T of the scraping wing 9 and the inner annular groove A shearing action is exerted between the 10 outward facing inner surfaces. In addition, when passing through the first through holes 7 a on the side of the first introduction chamber 13 of the stator 7, a shearing action works.

  On the other hand, the liquid substance R discharged from the discharge unit 12 is supplied to the recirculation mechanism unit 70 through the discharge passage 18. The recirculation mechanism unit 70 separates air bubbles from the liquid substance R, and a part (for example, an arbitrary ratio of 10 to 90%) of the liquid substance R is again drawn through the circulation channel 16 to the suction / stirring pump Y To the second supply unit 17 of The remainder of the liquid substance R is supplied to the storage tank 51 through the discharge passage 22 together with the bubbles contained in the liquid substance R.

  The liquid substance R supplied to the second supply unit 17 of the suction / stirring pump Y is introduced into the second introduction chamber 14 in a state where the flow rate is restricted via the throttling unit 14 a of the second supply unit 17. The liquid substance R is sheared by the plurality of rotating stirring blades 21 in the second introduction chamber 14. Furthermore, the liquid substance R also receives a shearing action when passing through the second through hole 7 b on the second introduction chamber 14 side. At this time, it is introduced into the wing chamber 8 in a state in which the flow rate is limited via the second through hole 7 b on the second introduction chamber 14 side. Then, after being subjected to a shearing action by the rotating blades 6 rotating at high speed in the wing chamber 8, the liquid substance R is mixed with the liquid substance R from the first introduction chamber 13 and discharged from the discharge portion 12.

  Here, the control unit controls the number of rotations of the rotor 5 (peripheral velocity of the rotary blade 6) so that the pressure in the first introduction chamber 13 and the second introduction chamber 14 becomes a predetermined negative pressure state. By rotating the rotary vanes 6 at the controlled rotational speed of the rotor 5 (peripheral speed of the rotary vanes 6), at least the first through holes 7 a on the first introduction chamber 13 side of the stator 7 and the second introduction chamber 14 side A region in the wing chamber 8 immediately after passing through the second through hole 7b of the above is continuously over the entire circumference in the wing chamber 8 and a fine bubble region in which a large number of fine bubbles (fine bubbles) of the liquid substance R are generated. (It can form as a bubble generation area | region by cavitation (pressure reduction boiling)).

In this case, when the suction and stirring pump Y is operated, the pressure in the first introduction chamber 13 and the second introduction chamber 14 is, for example, -0.01 to -0.10 Mpa, preferably -0.03 to The peripheral velocity of the rotor 6 of the suction and agitation pump Y is, for example, 6 to 80 m / s, more preferably −0.09 Mpa, more preferably −0.04 to −0.08 Mpa. Preferably, it is set to 15 to 50 m / s.
Here, the negative pressure state refers to the pressure in the first introduction chamber 13 and the second introduction chamber 14 measured by the pressure gauge 80.

By the way, in the decomposition apparatus 100, the plasma generation mechanism Z is disposed in the discharge path 18 connected to the discharge part 12 of the suction and stirring pump Y, through which the liquid substance R is supplied and passed.
Then, a pulse voltage is applied between the electrodes 81 by the power supply 82 of the plasma generation mechanism Z. Thereby, plasma is generated in the fine bubbles in the liquid substance R.

  By generating plasma in fine bubbles generated in the liquid substance R, active oxygen such as hydroxy radical and oxygen radical can be generated in the liquid substance R. Such active oxygen can decompose the persistent organic compound contained in the liquid substance R in a short time.

  The inventors have also found that the generation of active oxygen such as hydroxy radical in fine bubbles promotes the decomposition of persistent organic compounds. Usually, active oxygen such as hydroxy radical has a short life due to its high reactivity, and tends to disintegrate immediately after generation. However, as described above, active oxygen such as hydroxy radical is generated in fine bubbles of fine diameter. The inventors consider that the lifetime of active oxygen such as hydroxy radical in a fine bubble is longer than the lifetime of active oxygen in a bubble whose diameter is larger than that of the fine bubble. As described above, fine bubbles include ultra fine bubbles having a diameter of 1 μm or less, but the inventors consider that the life of active oxygen in the ultra fine bubbles is also relatively long. Therefore, it is believed that the contact time between the persistent organic compound and the active oxygen is prolonged, and the decomposition of the persistent organic compound is promoted.

In addition, by applying a voltage between the electrodes 81 of the plasma generation mechanism Z, plasma is generated in the fine bubble. In the plasma, molecules constituting the gas in the bubble are ionized to be separated into positive ions and electrons. The positive ions sputter the electrode 81 to generate nanoparticles containing an element constituting the electrode 81.
Therefore, in the liquid substance R, fine bubbles as bubbles, active oxygen such as hydroxy radicals and oxygen radicals generated by plasma in the fine bubbles, and nanoparticles are present.
Although persistent organic compounds are degraded by active oxygen, the present inventors also found that the nanoparticles present in the liquid substance also somehow participate in the degradation of persistent organic compounds It is thought that it promotes the decomposition of organic organic compounds.

  The nanoparticles are made of the above-described elements constituting the electrode 81, and oxides or the like in which the elements are oxidized. Further, the difficultly decomposable organic compound is mixed with the above-mentioned solvents such as water, acidic aqueous solvent, alkaline aqueous solvent and alcohol solvent. In addition, the persistent organic compound may be present in the liquid substance R as a compound in a state in which the bond is completed by decomposition. Therefore, the nanoparticles are formed of chloride, nitrate, nitrite, sulfate, acetate, sulfite, water, and the like by the combination of the element constituting the electrode 81, the solvent, and the compound obtained by the decomposition of the persistent organic compound. It may exist in the form of an oxide salt or the like.

  As described above, the liquid substance R can be mixed with a pH adjuster such as an alkaline neutralizer and an acidic neutralizer. In this case, inorganic salts such as sodium sulfate, sodium carbonate and potassium chloride, sodium glycolate and sodium citrate, etc. are obtained by combining the pH adjuster with the above-mentioned solvent and the compound obtained by decomposing the hardly degradable organic compound. And organic salts may be included.

The liquid substance R containing the persistent organic compound decomposed in this manner is supplied to the recirculation mechanism unit 70. The recirculation mechanism unit 70 separates the air bubbles from the liquid substance R, and supplies a part of the liquid substance R to the second supply unit 17 of the suction / stirring pump Y again via the circulation flow path 16. Thereby, the generation of fine bubbles and the generation of plasma can be repeatedly performed in the liquid substance R containing a hardly decomposable organic compound to accelerate the decomposition of the hardly decomposable organic compound.
As mentioned above, in the decomposition | disassembly method using the said decomposition apparatus, a persistent organic compound can be decomposed | disassembled efficiently in a short time.

The liquid substance R containing the persistent organic compound decomposed as described above is stored in the storage tank 51. Thereafter, the operation of the suction and stirring pump Y is stopped.
Then, the liquid substance R containing the decomposed and degradable organic compound stored in the storage tank 51 is discharged through the discharge passage 53.

Second Embodiment
An embodiment of a treatment liquid used for decomposing the hardly degradable organic compound according to the present invention and a method for producing the treatment liquid will be described.
In the first embodiment, the liquid substance R containing a hardly decomposable organic compound is introduced into the decomposing apparatus 100, and the hardly decomposable organic compound is decomposed. In the present embodiment, a solution such as water is introduced into the decomposing apparatus 100, and the processing liquid passing through the decomposing apparatus 100 is generated. Then, the treatment liquid and the difficultly decomposable organic compound are mixed, for example, in a predetermined tank. Thereby, the difficultly decomposable organic compound is decomposed by the treatment liquid. The details will be described below. However, explanation is omitted or simplified about a portion which overlaps with the above-mentioned 1st embodiment.

A solution such as water, for example, is supplied and stored in the storage tank 51 of the liquid substance supply unit X via the liquid substance supply pipe 51R. At this time, unlike the first embodiment, the non-degradable organic compound is not mixed in the solution such as water.
Then, the rotor 5 is rotated while supplying a solution such as water from the storage tank 51 of the liquid substance supply unit X, and the operation of the suction and agitation pump Y is continued for a predetermined time.

  When the rotor 5 is driven to rotate, the solution such as water supplied to the suction / stirring pump Y performs a shearing action by the scraping blade 9, a shearing action by passing through the first through hole 7a, and a shearing action by the stirring blade 21. So-called reduced pressure boiling (cavitation) occurs in the surface (rear surface) 6a on the rear side in the rotational direction of the rotary blade 6 while being stirred by the shearing action or the like by passing through the second through holes 7b. Therefore, it is possible to efficiently stir a solution such as water by the rotary blade 6 to cause reduced pressure boiling and efficiently generate fine bubbles of fine diameter.

  Then, a pulse voltage is applied between the electrodes 81 by the power supply 82 of the plasma generation mechanism Z, so that plasma is generated in the fine bubbles generated in the solution such as water due to the cavitation to manufacture the treatment liquid. By generating plasma in the fine bubbles generated in the processing solution produced in this manner, active oxygen such as hydroxy radical and oxygen radical can be generated in the solution such as water.

  In the plasma, molecules constituting the gas in the bubble are ionized to be separated into positive ions and electrons. The positive ions sputter the electrode 81 of the plasma generation mechanism Z, thereby generating nanoparticles containing the elements constituting the electrode 81. Therefore, in the treatment liquid, fine bubbles as bubbles, active oxygen such as hydroxy radicals and oxygen radicals generated by plasma in the fine bubbles, and nanoparticles are present.

  The treatment liquid produced in this manner and the non-degradable organic compound are mixed, for example, in a predetermined tank. Thereby, the difficultly decomposable organic compound is decomposed by the treatment liquid. As a mixing method, the treatment liquid produced as described above may be introduced into a container containing a liquid substance R containing a hardly decomposable organic compound and mixed, or it may be produced as described above The liquid substance R containing a non-degradable organic compound may be charged into a container containing the treatment liquid and mixed. The persistent organic compound mixed with the treatment liquid is decomposed in a short time by active oxygen such as hydroxy radical and oxygen radical generated by plasma in the fine bubble. Further, as in the first embodiment, the nanoparticles present in the treatment liquid are also considered to be involved in the decomposition of the hardly decomposable organic compound.

In addition, as in the first embodiment, the inventors have found that when active oxygen such as a hydroxy radical is generated in the fine bubble, the decomposition of the hard-to-degrade organic compound is promoted.
In addition, since the bubbles in the processing solution are fine bubbles, the life of active oxygen in the fine bubbles is considered to be long. Therefore, it can be stored as a treatment liquid, and even after being stored for a predetermined period of time, the persistent organic compound can be decomposed.

  In addition, the solution introduce | transduced into the decomposition apparatus 100 in this embodiment is not limited to water. For example, the solution can use the solvent used in the first embodiment.

(Example)
Below, the decomposition test performed using the decomposition apparatus 100 is demonstrated.
(1) Experimental conditions The experimental conditions of the decomposition test are as shown in Table 1 below.

As shown in Table 1 above, a methylene blue aqueous solution was used as the liquid substance R. That is, the liquid substance R is produced as a methylene blue aqueous solution by mixing methylene blue as a hardly decomposable organic compound and water as a solvent.
The concentration of methylene blue in the liquid substance R was 10 ppm, and 1.0 L was used as the liquid substance R. Three kinds of pH 3, pH 7, and pH 11 were used as the initial pH of the liquid substance R. Further, sodium hydroxide was mixed with the liquid substance R as a pH adjuster.
The set temperature of the chiller as the cooling water circulation device (cooling means) was 5 ° C.

As a pair of electrodes 81 of the plasma generation mechanism Z, cylindrical copper with a diameter of 1.0 mm was used. The gap length between the pair of electrodes 81, that is, the electrode distance was 1.0 mm. A ± 3 kV pulse voltage having a pulse width of 0.8 μs and a frequency of 300 kHz was applied from the power supply 82 of the plasma generation mechanism Z to the pair of electrodes 81.
Further, as the rotational speed of the rotor 5 of the decomposing apparatus 100, that is, the rotor 5 of the suction / stirring pump Y, 7200 rpm, which is a rating of the decomposing apparatus 100, was used.
In addition, a suction stirring pump Y made of ABS resin was used.
And, 0 min (minute), 2 min, 5 min, 10 min, 20 min, 50 min and 100 min were adopted as the decomposition processing time.

(2) Changes in pH (initial pH = pH3, pH7, pH11)
The results of changes in pH of methylene blue aqueous solution carried out under the above experimental conditions are shown in Table 2.

Table 2 shows changes in pH with time of 0 min, 2 min, 5 min, 10 min, 20 min, 50 min and 100 min when the initial pH of the methylene blue aqueous solution is pH 3, pH 7, and pH 11, respectively. In all cases where the initial pH of the methylene blue aqueous solution is pH 3, pH 7, and pH 11, the pH becomes acidic with the passage of time. Here, in the decomposition apparatus 100, as described above, fine bubbles as bubbles and active oxygen such as hydroxy radicals and oxygen radicals generated by plasma in the fine bubbles are contained in the liquid substance R containing a hardly decomposable organic compound. Nanoparticles are present to decompose persistent organic compounds. When methylene blue as a persistent organic compound is introduced into the decomposition apparatus 100 and is decomposed by active oxygen such as hydroxy radical, CO ₂ , H ₂ O, HNO _{3 and the} like are generated. Therefore, it can be understood that the pH was shifted to acidity by decomposition of methylene blue to generate CO ₂ , HNO _{3 and the} like. Therefore, it was found that even if the liquid substance R containing any of the acidic, neutral and alkaline hard-to-degrade organic compounds, the hard-to-degrade organic compounds are decomposed by this decomposition method.
The pH was measured using a portable pH meter D-71 waterproof plastic pH electrode 9625-10D manufactured by Horiba, Ltd.

(3) Changes in Absorbance Next, the results of changes in absorbance of the methylene blue aqueous solution carried out under the above-described experimental conditions will be described. From the following results, it was found that, even if the liquid substance R containing any of acidic, neutral and alkaline persistent organic compounds, the persistent organic compounds are decomposed by this decomposition method. The results of changes in absorbance of the methylene blue aqueous solution are shown below for each of initial pH = pH3, pH7 and pH11. Absorbance was measured using visible-ultraviolet spectroscopy.

(3-1) Initial pH = 7
(A) Change in absorbance (0 min to 100 min)
The results of measurement from absorbance of the methylene blue aqueous solution having an initial pH of 7 and the decomposition with the lapse of time of 0 min, 2 min, 5 min, 10 min, 20 min, 50 min and 100 min are shown in FIG. As shown in FIG. 7, for example, it is understood that the absorbance at a wavelength of around 670 nm decreases with the elapse of the decomposition processing time of methylene blue in the decomposition apparatus 100, and that methylene blue which is a difficultly decomposable organic compound is decomposed. The The methylene blue aqueous solution has a property of absorbing light having a wavelength of around 660 nm.

Further, the methylene blue aqueous solution is decomposed even when the decomposition processing time in the decomposition apparatus 100 has passed 2 minutes and 5 minutes. In addition, when the decomposition treatment time is 10 min to 100 min, the absorbance is almost "0", and it can be seen that the decomposition has progressed to a considerable extent. Therefore, it was found that, by using the decomposition apparatus 100, methylene blue which is a difficultly degradable organic compound can be decomposed in a short time.
An aqueous solution of methylene blue was placed in a quartz cell using an ultraviolet-visible spectrophotometer (V-730BIO, manufactured by JASCO Corporation), and the absorbance was measured at room temperature. The same is true for the following absorbance measurements.

(B) Change in absorbance (after 1800 h (hours))
Next, after the methylene blue aqueous solution having an initial pH of 7 was treated with the decomposition apparatus 100 for 0 min, 2 min, 5 min, 10 min, 20 min, 50 min and 100 min, the absorbance was measured about 1800 h (hour) The second measurement) is shown in FIG. As shown in FIG. 8, it can be seen that, for example, the absorbance near 670 nm is nearly “0” except for the result of 0 min which was not processed by the decomposition apparatus 100.

And in FIG. 7, when processing is performed by the decomposition apparatus 100 for 2 min and 5 min for 2 min and 5 min of the methylene blue aqueous solution having an initial pH of 7, the absorbance at around 670 nm is not “0”. On the other hand, as shown in FIG. 8, after treating with methylene blue aqueous solution having an initial pH of 7 for 2 min and 5 min in decomposition apparatus 100, when about 1800 h has elapsed, the absorbance near 670 nm at each processing time is approximately It is close to "0".
When the initial pH is 7 and the decomposition time is 10 minutes to 100 minutes, and the absorbance is measured after about 1800 hours, the absorbance is close to “0”.

  Therefore, it was found that once the liquid substance R containing methylene blue, which is a difficultly decomposable organic compound, is treated in the decomposition apparatus 100, the decomposition of methylene blue is progressing even when time passes after the treatment. The inventors found that the liquid substance R contains fine bubbles as bubbles, active oxygen such as hydroxyl radicals and oxygen radicals generated by plasma in the fine bubbles, and nanoparticles. When time passes after the decomposition treatment of the substance R, it is considered that it contributes to the decomposition of the persistent organic compound in the liquid substance R. However, fine bubbles, active oxygen and nanoparticles may disappear with the passage of time, and the presence of at least one of fine bubbles, active oxygen and nanoparticles contributes to the decomposition of persistent organic compounds. I also think. Alternatively, it is also considered that at least two or more of fine bubbles, active oxygen and nanoparticles are present, and their interaction contributes to the decomposition of the persistent organic compound.

  In the second embodiment, a solution such as water is treated by the decomposition apparatus 100 to produce a treatment liquid. Then, the treatment liquid and the difficultly decomposable organic compound are mixed, for example, in a predetermined tank. According to the above experimental results, the decomposition of the persistent organic compound in the liquid substance R proceeds even after a lapse of time after the liquid substance R is treated in the decomposition apparatus 100. Therefore, it is considered that the treatment liquid after being treated by the decomposition apparatus 100 can also decompose the hardly decomposable organic compound. This is because it is considered that the treatment liquid contains at least one of fine bubbles as bubbles, active oxygen such as hydroxy radicals and oxygen radicals generated by plasma in the fine bubbles, and nanoparticles. Therefore, it is possible to decompose the degradable organic compound by, for example, mixing the process liquid after the solution is processed in the decomposition apparatus 100 and the hardly degradable organic compound in a predetermined tank, for example. I understood.

(3-2) Initial pH = 11
(A) Change in absorbance (0 min to 100 min)
The state of methylene blue aqueous solution having an initial pH of 11 being decomposed with the lapse of time of 0 min, 2 min, 5 min, 10 min, 20 min, 50 min and 100 min is measured from the absorbance (the first measurement). As shown in FIG. 9, for example, the absorbance at around 670 nm decreases with the elapse of the decomposition processing time of methylene blue in the decomposition apparatus 100, and it can be seen that methylene blue, which is a difficultly decomposable organic compound, is decomposed. Further, the methylene blue aqueous solution is decomposed even when the decomposition processing time in the decomposition apparatus 100 has passed 2 min, 5 min and 10 min. Further, when the decomposition treatment time is 20 min to 100 min, the absorbance is almost "0", and it can be seen that the decomposition has progressed to a considerable extent. Therefore, it was found that, by using the decomposition apparatus 100, methylene blue which is a difficultly degradable organic compound can be decomposed in a short time.

(B) Change in absorbance (after 1800 h)
Next, after processing with methylene blue aqueous solution of initial pH 11 for 0 min, 2 min, 5 min, 10 min, 20 min, 50 min and 100 min with decomposition apparatus 100, the result of measuring the absorbance about 1800 h has passed (measurement 2) ) Is shown in FIG. As shown in FIG. 10, it can be seen that, for example, the absorbance near 600 nm is nearly “0” except for the results of the decomposition processing time in the decomposition apparatus 100 at 0 min, 2 min, 5 min and 10 min.

Then, in FIG. 9, when the methylene blue aqueous solution having an initial pH of 11 is treated with the decomposition apparatus 100 for 2 minutes, 5 minutes and 10 minutes, the absorbance at around 670 nm is not “0”. On the other hand, as shown in FIG. 10, after the treatment with decomposition apparatus 100 for 2 min, 5 min and 10 min, with methylene blue aqueous solution having an initial pH of 11, when about 1800 h has elapsed, the absorbance around 670 nm at each treatment time Is lower than in the case of FIG.
When the initial pH is 11 and the decomposition time is 20 minutes to 100 minutes, and the absorbance is measured after about 1800 hours, the absorbance is close to “0”.

  Therefore, it was found that once the liquid substance R containing methylene blue, which is a difficultly degradable organic compound, was treated in the decomposition apparatus 100 in the same manner as described above, the decomposition of methylene blue was progressing even when time passed after the decomposition treatment. . From this result, as described above, the degradable organic compound can be decomposed by, for example, mixing the treatment liquid after the treatment with the decomposition apparatus 100 and the hardly decomposable organic compound in a predetermined tank. It turned out that it is possible.

(3-3) Initial pH = 3
(A) Change in absorbance (0 min to 100 min)
Next, FIG. 11 shows the results of measurement of the state in which a methylene blue aqueous solution having an initial pH of 3 is decomposed with the lapse of time of 0 min, 2 min, 5 min, 10 min, 20 min, 50 min and 100 min from absorbance (measurement 1). . As shown in FIG. 11, the absorbance at, for example, around 670 nm decreases with the elapse of the decomposition processing time of methylene blue in the decomposition apparatus 100, and it can be seen that methylene blue, which is a difficultly decomposable organic compound, is decomposed. Further, it can be seen that the decomposition of the methylene blue aqueous solution is progressing even when the decomposition processing time in the decomposition apparatus 100 is 2 minutes and 5 minutes, and the decomposition is considerably advanced when 10 minutes has elapsed. Therefore, it was found that, by using the decomposition apparatus 100, methylene blue which is a difficultly degradable organic compound can be decomposed in a short time.

(B) Change in absorbance (after 1300 h)
Next, after processing with methylene blue aqueous solution of initial pH 3 for 0 min, 2 min, 5 min, 10 min, 20 min, 50 min and 100 min with decomposition apparatus 100, the result of measuring absorbance after about 1300 h (measurement 2) ) Is shown in FIG. As shown in FIG. 12, it can be seen that, for example, the absorbance near 670 nm is nearly “0” except for the result of the decomposition processing time of 0 min in the decomposition apparatus 100.

Then, in FIG. 11, when the methylene blue aqueous solution having an initial pH of 3 is treated with the decomposition apparatus 100 for 2 minutes and 5 minutes, although the absorbance near 670 nm is small, it is not “0”. On the other hand, as shown in FIG. 12, after treating with methylene blue aqueous solution having an initial pH of 3 in the decomposition apparatus 100 for 2 min and 5 min, when about 1300 h has elapsed, the absorbance near 670 nm at each processing time is approximately It is close to "0".
When the initial pH is 3 and the decomposition treatment time is 10 minutes to 100 minutes, and the absorbance is measured after about 1300 hours, the absorbance is nearly “0”.

  Therefore, it was found that once the liquid substance R containing methylene blue, which is a difficultly degradable organic compound, was treated in the decomposition apparatus 100 in the same manner as described above, the decomposition of methylene blue was progressing even when time passed after the decomposition treatment. . From this result, as described above, the degradable organic compound can be decomposed by, for example, mixing the treatment liquid after the treatment with the decomposition apparatus 100 and the hardly decomposable organic compound in a predetermined tank. It turned out that it is possible.

Other Embodiments
In the decomposing apparatus 100 according to the above-described embodiment, the liquid substance R obtained by mixing the difficultly decomposable organic compound and the solvent such as water is supplied to the storage tank 51 of the liquid substance supply unit X. However, instead of the storage tank 51, the decomposition apparatus 100 supplies a compound supply mechanism that supplies a persistent organic compound to the suction and agitation pump Y, and a solvent supply mechanism that supplies a solvent of the persistent organic compound to the suction and agitation pump Y And may be provided. As a result, the non-degradable organic compound is supplied to the suction / stirring pump Y from the compound supply mechanism, and the solvent is supplied from the solvent supply mechanism. In the suction / stirring pump Y, the hardly-decomposable organic compound and the solvent are stirred and mixed to form a liquid substance R. Then, the liquid substance R is agitated in the suction / stirring pump Y to generate a fine bubble. After that, plasma can be generated in the fine bubbles in the liquid substance R by the plasma generation mechanism Z, and active oxygen such as hydroxy radical and oxygen radical can be generated in the liquid substance R. The other configuration is the same as that of the above embodiment.

  The configurations disclosed in the above embodiments (including the other embodiments, and the same hereinafter) can be applied in combination with the configurations disclosed in the other embodiments as long as no contradiction arises. The embodiment disclosed in the present specification is an exemplification, and the embodiment of the present invention is not limited to this, and can be appropriately modified within the scope of the object of the present invention.

1: Casing 2: Front wall 3: Back wall 4: Outer peripheral wall 5: Rotor 5 a: Mounting part 6: Rotor wing 7: Stator 7 a: First through hole 7 b: Second through hole 8: wing chamber 9: Scraping wing 9B: base end 9M: middle part 9T: tip 9a: back 9f: scraping surface 9i: inward side 9m: dissipation surface 9o: outward side 9t: tip 10: annular groove 11: first supply Part 12: Discharge part 13: First introduction chamber 14: Second introduction chamber 14a: Throttling part 15: Partition plate 15a: Tubular sliding contact part 15b: Funnel part 15c: Annular flat part 16: Circulation flow path 17: First 2 Supply section 18: Discharge path 19: Drive shaft 20: Spacing member 21: Agitating blade 22: Discharge path 51: Reservoir 51G: I / O pipe 51R: Liquid substance supply pipe 52: Supply pipe 52P: Delivery pump 53: Discharge path 60: Introduction mechanism 70: Recirculation mechanism 71: Tubular container 72: introduction pipe 73: discharge part 74: circulation part 75: plate 80: pressure gauge 81: electrode 81a: electrode support part 82: power source 100: disassembly device A2: shaft center A3: shaft center M: pump drive motor R: Liquid substance X: Liquid substance supply unit Y: Suction and stirring pump Z: Plasma generation mechanism

Claims (8)

  A method for decomposable organic compounds, which comprises: generating fine bubbles in a liquid substance containing a degradable organic compound and generating plasma in the bubbles by plasma generation mechanism to decompose the degradable organic compound.   A hard-to-degrade organic compound that generates air bubbles by agitating a liquid substance containing a hard-to-degrade organic compound with a rotor, generates plasma in the air bubble by plasma generation mechanism, and decomposes the hard-to-degrade organic compound How to disassemble   The non-decomposable decomposition according to claim 2, wherein the liquid substance containing the hard-to-degrade organic compound is introduced into the wing chamber, and the liquid substance is agitated to generate air bubbles when the rotor rotates in the wing chamber. Method of organic organic compounds.   The decomposition method of the persistent organic compound according to any one of claims 1 to 3, wherein the plasma generated by the plasma generation mechanism is a low temperature plasma.   The method according to claim 4, wherein the low-temperature plasma is generated by glow discharge.   The said plasma generation | occurrence | production mechanism generate | occur | produces a plasma by applying a voltage between electrodes, The decomposition | disassembly method of the persistent organic compound of any one of Claims 1-5. An introduction chamber to which a liquid substance containing a persistent organic compound is supplied;
A rotor that has a plurality of rotor blades and rotates around a predetermined central axis to agitate the liquid substance in the introduction chamber with the plurality of rotor blades to generate air bubbles;
A plasma generation mechanism for generating plasma in the bubbles;
A decomposition device for persistent organic compounds, comprising:   A fine bubble is generated in the liquid substance by cavitation, and the fine bubble is processed and generated by generating plasma in the fine bubble by the plasma generation mechanism, and the degradable organic compound which is mixed with the hardly degradable organic compound is decomposed. Treatment liquid.

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