JP2007275829A - Purification treatment device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a purification treatment device capable of sufficiently supplying a sufficient amount of oxygen necessary for keeping microbial activity to the water to be treated in a tank. <P>SOLUTION: The purification treatment device is equipped with the carrier filling tank 21 arranged under the surface of the water of a target water area, a water passing device 24 for passing the water to be treated around the carrier filling tank 21 through the carrier filling tank 21 and a fine air bubble producing device 31 for mixing fine air bubbles with the water to be treated. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a purification treatment apparatus, and more particularly to a floating purification treatment apparatus installed on the surface of a water area.

  Conventionally, this type of purification treatment apparatus is, for example, shown in FIG. This is a floating-type purification treatment apparatus installed directly on the surface of a pond or in a lake, and supports a charcoal tank 3 having a blower 2 disposed on the top by a float 1.

  The charcoal tank 3 is filled with charcoal 4, and plants and zooplankton such as sea cucumber adsorbed on the charcoal 4 are oxidatively decomposed and mineralized by the food chain. Further, the charcoal 4 functions as a carrier for supporting microorganisms, and decomposes and purifies BOD, COD, SS (floating matter), TN, and TP by biological treatment with microorganisms.

  The charcoal tank 3 has cobblestones 5 spread on the top surface, and a circulation system 6 for circulating water to be treated such as lake water is provided inside. The circulation system 6 includes a water collection pipe 7 disposed at the bottom of the charcoal tank 3, a treated water discharge pipe 8 that opens toward the upper side of the charcoal tank 3, and a pipe between the water collection pipe 7 and the treated water discharge pipe 8. It comprises an underwater pump 9 interposed in the road, and the treated water purified while passing through the charcoal tank 3 in a downward flow is collected by the water collecting pipe 7, and the collected treated water is treated by the underwater pump 9. It is discharged in a horizontal flow through the discharge pipe 8 to the surrounding water area.

  A backwash pipe 10 is disposed at the bottom of the charcoal tank 3, and the air supplied by the blower 2 is periodically ejected from the backwash pipe 10, and the charcoal 4 is backwashed by the ejected air and adhered to the charcoal 4. The treated sludge is removed to maintain or restore the purification treatment capacity, prevent clogging of the charcoal tank 3, and restore water permeability.

  A diffuser 11 is installed on the side of the charcoal tank 3, the air supplied by the blower 2 is diffused from the diffuser 11, the water to be treated around the charcoal tank 3 is aerated, and flows into the charcoal tank 3. Supply dissolved oxygen to the water to be treated.

  Patent Document 1 describes a water quality improvement system in a closed water area. This is a second tank placed around the first tank, and a third tank placed around the second tank. The first tank is pumped up using the oxygen-poor water and polluted water in the closed water area as an upward flow. And a fine bubble generator for generating fine bubbles. The second tank has floating substance removing means and a microorganism carrier, and the floating substance removing means lowers the flow rate of the treated water overflowing from the upper end opening of the first tank at a lower flow rate than the flow rate of the upward flow of the first tank. It is distributed as a stream to remove floating substances. The microbial carrier is provided in the downward flow passage. In the third tank, the treated water flowing out from the second tank flows out to the upper surface of the closed water area as an upward flow, and sediment depositing means for depositing the sediment settled and separated from the treated water and sediment Sediment removal means for removing objects is provided.

Other prior art documents include Patent Documents 2 and 3.
Japanese Patent Laid-Open No. 2004-50085 JP-A-2005-842 JP 2005-7378 A

  In the above configuration, the processing target water flowing into the charcoal tank 3 is aerated by diffusing air from the diffuser 11 arranged on the side of the charcoal tank 3 and aeration of the processing target water around the charcoal tank 3. Replenishes dissolved oxygen.

  However, since the bubble diameter of the diffused air is in the range of several hundred μm to several mm and the bubble diameter is large, the dissolution rate (dissolution efficiency) in the water to be treated is low, and as a result, the treatment flows into the charcoal tank 3. The dissolved oxygen concentration of the target water is lowered. For this reason, when the water temperature rises in summer or when the BOD concentration in the water area becomes high, the required amount of oxygen cannot be sufficiently supplied to the aerobic microorganisms in the tank, and the activity effect of the aerobic microorganisms is insufficient. There was a problem.

  This invention solves said subject, and it aims at providing the purification processing apparatus which can supply sufficient oxygen required for maintenance of microbial activity to the process target water in a tank.

  In order to solve the above-mentioned problems, a purification treatment apparatus of the present invention includes a carrier filling tank disposed below the surface of a target water area, and a water flow apparatus for passing the treatment target water around the carrier filling tank into the carrier filling tank. And a fine bubble generator for mixing fine bubbles in the water to be treated.

Moreover, the fine bubble generator is provided in the pipe of the water supply device.
Moreover, the bubble diameter of a fine bubble is 0.1 micrometer-200 micrometers, It is characterized by the above-mentioned.
In addition, the fine bubble generating device includes a gas supply unit that has a cylindrical outer peripheral surface and communicates with an air supply source inside a casing having a cylindrical inner peripheral surface. An air-mixing flow path through which water to be treated flows is formed between the outer peripheral surfaces of the sections, and the gas supply section is made of a porous body or a porous body having micropores.

  In addition, the fine bubble generating device includes a gas supply portion having an inner peripheral surface in a cylindrical shape inside a casing that communicates with an air supply source, and forms an air-mixing channel through which water to be treated flows inside the gas supply portion. The gas supply part is made of a porous body or a porous body having micropores.

  Further, the water flow device is characterized by having a pump means in a pipe line upstream of the fine bubble generating device.

  As described above, according to the present invention, sufficient oxygen necessary for maintaining microorganisms can be supplied to the water to be treated in the tank. Further, it is preferable that the fine bubbles are mixed in the pipe line forming a limited space of the water flow device, and the dissolution rate of air with respect to the water to be treated becomes high, and as a result, the water to be treated flowing in the carrier filling tank. The dissolved oxygen concentration is further increased, and sufficient oxygen necessary for maintaining the microbial activity can be supplied to the water to be treated in the tank. The bubble diameter of the fine bubbles is preferably 0.1 μm to 200 μm, and the dissolution rate of air can be further increased.

  The fine bubble generator generates fine bubbles by causing the water to be processed to shear along the surface of the gas supply unit with the gas to be ejected in the form of fine semi-bubbles on the surface of the gas supply unit. Water to be treated is taken along. For this reason, air quantity necessary and sufficient for microbial activity can be easily mixed into the water to be treated as fine bubbles. In particular, the water flow device has a pump means in the pipeline upstream of the fine bubble generating device, so that a sufficient flow velocity can be given to the water flow, and the bubble diameter of the fine bubbles that depends on the flow velocity of the water flow is set to a predetermined dissolution rate. Can be made small enough to achieve this.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the purification treatment apparatus is a floating purification treatment apparatus installed directly on the surface of a pond or lake, and supports a carrier filling tank 21 disposed below the surface of the target water area and the carrier filling tank 21. A pair of floats 22, a blower 23 disposed at the top of the carrier filling tank 21, and a water flow device 24 that allows the water to be treated around the carrier filling tank 21 to flow into the inside of the carrier filling tank 21 in an upward flow. ing.

  The carrier filling tank 21 is covered with cobblestones 25 at the top, and the carrier 26 is filled inside. The carrier 26 supports microorganisms and is made of a porous body or a fibrous material. In the present embodiment, charcoal is used as the carrier 26.

  As shown in FIG. 2, the water flow device 24 includes a watering pipe 27 disposed at the bottom of the carrier filling tank 21, a water absorption pipe 28 opening toward the upper side of the carrier filling tank 21, a watering pipe 27 and water absorption. A communication pipe 29 communicating with the pipe 28 and a pump device 30 interposed in the middle of the communication pipe 29 are provided, and a fine bubble generating device 31 is interposed in the middle of the communication pipe 29 on the downstream side of the pump device 30. ing. A backwash tube 32 is disposed at the bottom of the carrier filling tank 21, and a blower 23 is connected to the backwash tube 32.

  As shown in FIG. 3, the fine bubble generating device 31 has a gas supply part 34 having an inner peripheral surface formed in a cylindrical shape inside a casing 33 communicating with the blower 23 of the air supply source. There is an air-mixing flow path 35 through which water to be treated flows.

  The air-mixing channel 35 has an upstream side communicating with the upstream side conduit of the connecting tube 29 and a downstream side communicating with the downstream side conduit of the connecting tube 29, and the gas supply unit 34 is a porous body or porous body having micropores. Consists of. In the present embodiment, the gas supply unit 34 is made of a ceramic porous wall, and the bubble diameter of the fine bubbles ejected from the fine holes is 0.1 μm to 200 μm or less.

  With the above configuration, the floating body purification treatment apparatus is installed in the target water area, and the blower 23 and the pump apparatus 30 are operated. The water flow device 24 absorbs the water to be treated around the carrier filling tank 21 through the water absorption pipe 28, and the water to be treated flows from the sprinkling pipe 27 through the communication pipe 29 and the pump device 30 to the inside of the carrier filling tank 21. Allow water to pass.

  As shown in FIG. 5, in ponds and lakes, phytoplankton ingests and propagates inorganic nutrients that are decomposed and eluted from the bottom of the lake, etc. The food chain is formed by breeding, the carcasses and excrement deposited on the bottom of the lake, and the dissolved organic matter and inorganic nutrients being decomposed and eluted from the sediment.

  The floating-type purification treatment apparatus of the present embodiment takes phytoplankton and zooplankton into the carrier filling tank 21, decomposes and mineralizes them by oxidative decomposition action, accelerates sedimentation and promotes purification. Moreover, the organic matter is decomposed by the microorganisms supported on the carrier 26 of the carrier filling tank 21 to purify the water to be treated.

  As shown in FIG. 6, a biofilm 36 is formed on the surface of the carrier 26 made of charcoal. The biofilm 36 takes in soluble organic substances 37 contained in the water to be treated into the body, and dissolved oxygen 38 in the water. Is decomposed into water 39 and carbon dioxide 40 to purify the water to be treated. At this time, if the dissolved oxygen concentration in the water to be treated is insufficient, the microbial activity is impaired and the purification is inhibited.

  For this reason, in the embodiment, in the fine bubble generating device 31, the air supplied from the blower 23 is ejected as fine bubbles to the mixed gas flow path 35 through the gas supply unit 34 and flows along the inner peripheral surface of the gas supply unit 34. The water to be treated replenishes dissolved oxygen by entraining fine bubbles. The bubble diameter of the fine bubbles is 0.1 μm to 200 μm.

  In this way, air is mixed as fine bubbles by the fine bubble generating device 31 in the pipes of the connecting pipe 29 and the water spray pipe 27 that form a limited space of the water flow apparatus 24, thereby the pipe of the water flow apparatus 24. The dissolution rate of the air with respect to the water to be treated flowing through the passage is increased, and as a result, the dissolved oxygen concentration of the water to be treated flowing in the upward flow between the carriers 26 in the carrier filling tank 21 is increased. Sufficient oxygen required to maintain the activity can be supplied to the water to be treated, and the air dissolution rate can be further increased by the fine bubbles having a bubble diameter of 0.1 μm to 200 μm.

  Then, the air supplied by the blower 23 is periodically ejected from the backwash pipe 32, and the carrier 26 is backwashed by the ejected air to restore the water permeability of the carrier filling tank 21 as a filter medium, or the surface of the carrier 26 The phytoplankton and zooplankton degradation products that are excessively attached to the surface are removed.

  In the present embodiment, the fine bubble generating device 31 is installed in the middle of the communication pipe 29. However, the fine bubble generating device 31 is installed in the vicinity of the side of the carrier filling tank 21 and the opening of the water absorption pipe 28, and the blower 23 may be configured to supply air to the gas supply unit 34 and provide a separate pump device on the upstream side of the air-mixing flow path 35.

  In addition, as shown in FIG. 4, the fine bubble generating device 31 includes a gas supply unit 34 that communicates with the blower 23 of the air supply source inside a casing 33 whose inner peripheral surface is cylindrical. It is also possible to form a mixed air flow path 35 through which the water to be treated flows.

In the present embodiment, the water flow device 24 allows the water to be treated to flow into the inside of the carrier filling tank 21 in an upward flow, but it is also possible to adopt a configuration in which water flows in a downward flow.
Further, as shown in FIG. 7, the fine bubble generating device 31 may be configured to supply water to be processed to the venturi tube 41 and to supply air to the reduced diameter portion 42.

  Moreover, the microbubble generator 31 can also be configured as shown in FIGS. Here, the casing 51 of the fine bubble generating device 31 includes an outer cylinder part 52 having an inner peripheral surface of a cylindrical shape, flange parts 53 and 54 disposed at both ends of the outer cylinder part 52, and one flange part 53 in a watertight manner. And an end plate 55 attached by a fastening member (not shown) such as a bolt.

  A gas supply part 56 forming an inner cylinder is disposed concentrically inside the outer cylinder part 52 of the casing 51, and the gas supply part 56 has a cylindrical outer peripheral surface and is a porous body or a porous body having micropores. In the present embodiment, the gas supply unit 56 is made of a ceramic porous wall.

  Between the inner peripheral surface of the outer cylinder portion 52 of the casing 51 and the outer peripheral surface of the gas supply portion 56, an air-mixing channel 57 is formed in which the water to be treated flows in a swirling flow. It opens at one end in the central direction, and the other end is watertightly closed by a rubber skirt 58. The rubber skirt 58 is externally fitted to the end of the gas supply unit 56 and is held by one flange portion 53, and between the gas supply unit 56 and the end plate 55 and between the gas supply unit 56 and the outer cylinder unit 52. It is intervening.

  The end plate 55 and the rubber skirt 58 are formed with through holes 55 a and 58 a communicating with the internal flow path of the gas supply unit 56, and a threaded pipe joint 59 is connected to the through hole 55 a of the end plate 55. The threaded pipe joint 59 includes a nipple 59 a that is screwed into the through hole 55 a of the end plate 55 and a socket 59 b that is connected to the blower 23.

  A plug 60 is watertightly fixed to one end of the gas supply unit 56, and one end of a rod 61 inserted into the gas supply unit 56 is connected to the plug 60. The other end of the rod 61 protrudes from the nipple 59 a into the socket 59 b, and the plug 60 is prevented from being removed via the rod 61 by tightening a wing nut 62 that is screwed to the other end.

  A jet part 63 is fixed to the other flange part 54 of the casing 51 by a fastening member (not shown) such as a bolt. The jet part 63 is connected to the flange part 54 of the casing 51 in a watertight manner and a reducer 65. The reducer 65 has a reduced diameter portion 65 a in the middle, and the tip opening 65 b that expands the diameter is in communication with the downstream pipe line of the communication pipe 29 of the water flow device 24.

  In this embodiment, the reducer 65 is provided in order to further promote air miniaturization. However, since the sufficient effect can be obtained without the reducer 65, the reducer 65 is not necessarily provided.

  The casing 51 has a liquid supply port 66 that communicates with the upstream pipe line of the communication pipe 29, and the liquid supply port 66 is connected to the mixed gas flow path 57 in a tangential direction. The liquid supply port 66 includes a connecting portion 66a for connecting the communication pipe 29 and a connection port 66b connected to the air-mixing flow path 57, and a water injection angle adjusting portion 67 is disposed in the connection port 66b.

  The water injection angle adjustment unit 67 includes two comb-shaped guide members 67a inserted into the connection port 66b of the liquid supply port 66, and a flange portion 67b that holds the guide member 67a. The flange portion 67b is connected to the connection portion 66a and the connection portion 66a. It is interposed between the flange portions 66c and 66d of the opening 66b, and is fixed by a fastening member (not shown) such as a bolt.

A plurality of water injection angle adjusting portions 67 having different inclination angles of the guide member 67a are prepared, and the swirling pitch of the swirling flow can be set and changed by replacing them.
In the above configuration, the water to be processed supplied by the pump device 30 is supplied to the air-mixing flow path 57 through the liquid supply port 66. The water to be treated that flows into the mixture channel 57 from the water injection angle adjusting unit 67 is guided by the guide member 67 a and flows into the mixture channel 57 so as to be inclined with respect to the axes of the gas supply unit 56 and the mixture channel 57. Then, it flows in the mixed air flow path 57 in a swirling flow.

  Here, when the water injection angle adjustment unit 67 having a different inclination angle of the guide member 67 a is used, the swirl pitch of the swirl flow changes, and the swirl flow flows along the outer peripheral surface of the gas supply unit 56 while flowing through the mixed gas flow path 57. The distance changes.

  When the guide member 67a is guided to flow into the air-mixing flow path 57, the angle at which the inflowing water is inclined with respect to the axis of the gas supply section 56 and the air-mixing flow path 57 is close to 90 °. The distance that flows along the outer peripheral surface of the gas supply portion increases, and the turning angular velocity on the outer peripheral surface of the gas supply unit 56 increases.

  When the guide member 67a is guided to flow into the air-mixing flow path 57, the angle at which the inflowing water is inclined with respect to the axis of the gas supply section 56 and the air-mixing flow path 57 is close to 0 °. The distance flowing along the outer peripheral surface of the gas supply portion 56 becomes shorter, and the turning angular velocity on the outer peripheral surface of the gas supply unit 56 becomes slower.

  On the other hand, the pressurized air from the blower 23 is supplied to the gas supply unit 56 through the screw fitting 59. In a state where the water to be treated flows in a swirl flow through the air-mixing flow path 57, air is jetted from the outer peripheral surface to the air-mixing flow path 57 through a porous body having micropores in the gas supply unit 56 or a wall body made of a porous body.

  At this time, the swirl flow flows along the outer peripheral surface of the gas supply unit 56, and the swirl flow flows along the outer peripheral surface of the gas supply unit 56 with the gas ejected in the form of minute semi-bubbles on the outer peripheral surface of the gas supply unit 56. The fine bubbles are generated by shearing, and the fine bubbles are continuously generated by the swirling flow entrained from the outer peripheral surface of the gas supply unit 56.

  At this time, as the flow velocity of the swirl flow on the outer peripheral surface of the gas supply unit 56 increases, and as the hole diameter of the microholes in the wall body decreases, the particle size of the fine bubbles decreases, and the swirl flow of the gas supply unit 56 increases. The amount of bubbles entrained increases as the distance flowing along the outer peripheral surface increases.

  Therefore, by adjusting the flow rate of the processing target water to be supplied and the amount of air to be supplied, an arbitrary amount of air can be mixed into the processing target water as fine bubbles, and the bubble diameter of the fine bubbles can also be adjusted. . In the present embodiment, since the water to be treated is supplied to the mixed air flow path 57 by the pump device 30, a sufficient swirling flow velocity can be ensured.

  The swirling flow of the gas-liquid mixed phase accompanied by the fine bubbles flows out from the opening of one end of the mixed gas flow path 57 to the outside of the casing 51 and flows into the ejection part 63. The swirling flow of the gas-liquid mixed phase that has flowed into the jet part 63 passes through the reduced diameter part 65a, moves while the swirling radius is increased in the reducer 65, and flows into the downstream pipe line of the connecting pipe 29 from the tip opening 65b.

  Moreover, the microbubble generator 31 can also be configured as shown in FIG. Here, the casing 71 of the fine bubble generating device 31 is watertightly joined to one end 73 of the outer sleeve 72 having the gas supply port 72a and the end portions 73, 74 on both sides of the outer sleeve 72, such as bolts and the like. The end plate 75 is attached by the fastening member 71a.

  A gas supply unit 76 is disposed inside the outer casing 72 of the casing 71. The gas supply unit 76 has an inner peripheral surface that is cylindrical, and forms an air-mixing channel 77 through which the water to be treated flows in a swirling flow. . The gas supply unit 76 is made of a porous body or a porous body having micropores, and in the present embodiment, is made of a ceramic porous wall.

  The air-mixing flow path 77 is opened at one end of the casing 71 in the axial direction, and the other end is sealed watertight by a rubber ring 78. The rubber ring 78 is interposed between the end of the gas supply unit 76 and the end plate 75.

The end plate 75 is formed with a through hole 75 a communicating with the air-mixing flow path 77 of the gas supply unit 76, and the liquid supply unit 79 is connected to the through hole 75 a of the end plate 75.
The liquid supply unit 79 includes a liquid supply port 80 that communicates with the upstream line of the communication tube 29 of the water communication device 24, and a liquid channel 81 that has an inner peripheral surface that is cylindrical and communicates with the air-mixing channel 77. is doing.

  The liquid supply port 80 has a connecting portion 80a for connecting to the upstream pipe line of the connecting pipe 29 and a connection port 80b for connecting to the liquid channel 81 in a tangential direction, and adjusting the water injection angle to the connection port 80b. The part 82 is arranged.

  The water injection angle adjustment unit 82 includes two comb-shaped guide members 82a inserted into the connection port 80b of the liquid supply port 80 and a flange unit 82b that holds the guide member 82a. The flange unit 82b is connected to the connection unit 80a and the connection unit 80a. It is interposed between the mouths 80b and fixed with fastening members (not shown) such as bolts. A plurality of water injection angle adjusting units 82 having different inclination angles of the guide member 82a are prepared, and the swirling pitch of the swirling flow can be set and changed by replacing them.

  An ejection portion 83 is fixed to the other end portion 74 of the casing 71 by a fastening member 71b such as a bolt. The ejection portion 83 includes a flange portion 84 and a reducer 85 which are joined to the end portion 74 of the casing 71 in a watertight manner. The reducer 85 increases in diameter from the small diameter portion 85 a toward the tip opening 85 b, and the tip opening 85 b communicates with the downstream pipe line of the connecting pipe 29.

  In the above configuration, the water to be treated is supplied to the liquid flow path 81 through the liquid supply port 80 of the liquid supply unit 79 by the pump device 30. The water to be treated that flows into the liquid channel 81 from the water injection angle adjusting unit 82 is guided by the guide member 82 a and flows into the liquid channel 81 so as to be inclined with respect to the axis of the liquid channel 81. 81 and the mixed air flow path 77 flow in a swirling flow.

  Here, when the water injection angle adjustment unit 82 having a different inclination angle of the guide member 82 a is used, the swirl pitch of the swirl flow changes, and the swirl flow flows along the inner circumferential surface of the gas supply unit 76 while flowing through the mixed gas flow path 77. The flowing distance changes.

  When flowing into the liquid flow path 81 by being guided by the guide member 82a, the angle at which the inflowing water is inclined with respect to the axial center of the liquid flow path 81 is closer to 90 ° on the inner peripheral surface of the gas supply unit 76. The distance which flows along becomes long, and the turning angular velocity in the internal peripheral surface of the gas supply part 76 becomes quick.

  When flowing into the liquid channel 81 by being guided by the guide member 82a, the angle at which the inflowing water is inclined with respect to the axis of the liquid channel 81 is closer to 0 °, so that The distance which flows along becomes short, and the turning angular velocity in the outer peripheral surface of the gas supply part 76 becomes slow.

  On the other hand, the pressurized air is supplied from the blower 23 to the gas supply unit 76 through the gas supply port 72a. In a state where the water to be treated flows in the swirl flow through the air mixture channel 77, the air is jetted from the inner peripheral surface to the gas mixture channel 77 through the porous body having the micropores of the gas supply unit 76 or the wall body made of the porous body.

  At this time, the swirling flow flows along the inner peripheral surface of the gas supply unit 76, and the swirling flow is the inner peripheral surface of the gas supply unit 76, which is ejected in a minute semi-bubble shape on the inner peripheral surface of the gas supply unit 76. The microbubbles are generated by shearing along the line, and the microbubbles are continuously generated by the swirling flow entrained from the inner peripheral surface of the gas supply unit 76.

  At this time, as the flow velocity of the swirl flow on the inner peripheral surface of the gas supply unit 76 increases, and as the pore diameter of the micropores in the wall body decreases, the particle size of the fine bubbles decreases, and the swirl flow becomes the gas supply unit 76. The amount of bubbles entrained increases as the distance flowing along the inner circumferential surface increases.

  Therefore, by adjusting the flow rate of the processing target water to be supplied and the amount of air to be supplied, an arbitrary amount of air can be mixed into the processing target water as fine bubbles, and the bubble diameter of the fine bubbles can also be adjusted. . In the present embodiment, since the water to be treated is supplied to the mixed air flow path 77 by the pump device 30, a sufficient swirling flow velocity can be ensured.

  The swirling flow of the gas-liquid mixed phase accompanied by fine bubbles flows out of the casing 71 through the opening at one end of the mixed gas flow channel 77 and flows into the ejection part 83. The swirling flow of the gas-liquid mixed phase that has flowed into the ejection portion 83 passes through the small-diameter portion 85a, moves while expanding the swirling radius in the reducer 85, and flows out from the tip opening 85b to the downstream pipe line of the connecting pipe 29.

  In this embodiment, the reducer 85 is provided in order to further promote the miniaturization of air. However, since the sufficient effect can be obtained without the reducer 85, the reducer 85 is not necessarily provided.

The perspective view which shows the purification processing apparatus in embodiment of this invention Sectional view showing the purification treatment apparatus Sectional drawing which shows the fine bubble generator of the purification processing apparatus Sectional drawing which shows the microbubble generator in other embodiment of this invention Explanatory drawing which shows the purification effect | action of a purification processing apparatus Schematic diagram showing the state of the carrier surface Sectional drawing which shows the microbubble generator in other embodiment of this invention The partially broken sectional view which shows the fine bubble generator in other embodiment of this invention Sectional drawing which shows the ejection part of the bubble generator Sectional drawing which shows the principal part of the bubble generator Sectional drawing which shows the principal part of the bubble generator The partially broken sectional view which shows the fine bubble generator in other embodiment of this invention Sectional drawing which shows the conventional purification processing apparatus

Explanation of symbols

DESCRIPTION OF SYMBOLS 21 Carrier filling tank 22 Float 23 Blower 24 Water flow apparatus 25 Cobblestone 26 Carrier 27 Sprinkling pipe 28 Water absorption pipe 29 Connection pipe 30 Pump apparatus 31 Fine bubble generator 32 Backwash pipe 33 Casing 34 Gas supply part 35 Mixed air flow path 36 Biofilm 37 Dissolved organic matter 38 Dissolved oxygen 39 Water 40 Carbon dioxide 41 Venturi tube 42 Reduced diameter portion 51 Casing 52 Outer cylinder portion 53, 54 Flange portion 55 End plate 55a Through hole,
56 Gas supply part 57 Mixed air flow path 58 Rubber skirt 58a Through hole 59 Screwed fitting 59a Nipple 59b Socket 60 Plug body 61 Rod 62 Wing nut 63 Jetting part 64 Flange part 65 Reducer 65a Reduced diameter part 65b End opening 66 Liquid supply port 66a Connecting part 66b Connection port 66c, 66d Flange part 67 Water injection angle adjustment part 67a Guide member 67b Flange part 71 Casing 72 Outer sleeve 72a Gas supply port 73, 74 End part 75 End plate 75a Through hole 76 Gas supply part 77 Mixed air flow path 78 Rubber Ring 79 Liquid supply part 80 Liquid supply port 81 Liquid flow path 80a Connection part 80b Connection port 82 Water injection angle adjustment part 82a Guide member 82b Flange part 83 Ejection part 84 Flange part 85 Reducer 85a Reduced diameter part 85b End opening

Claims (6)

A carrier filling tank arranged below the surface of the target water area, a water flow device for passing the treatment target water around the carrier filling tank into the carrier filling tank, and a fine bubble generator for mixing fine bubbles in the treatment target water A purification treatment apparatus comprising: The purification treatment apparatus according to claim 1, wherein the fine bubble generation device is provided in a pipe line of the water supply device. The purification apparatus according to claim 1 or 2, wherein the bubble diameter of the fine bubbles is 0.1 µm to 200 µm. In the fine bubble generating device, a gas supply unit that has a cylindrical outer peripheral surface and communicates with an air supply source is disposed inside a casing having a cylindrical inner peripheral surface, and the inner peripheral surface of the casing and the gas supply unit The mixed gas flow path through which the water to be treated flows is formed between the outer peripheral surfaces, and the gas supply unit is composed of a porous body or a porous body having micropores. Purification treatment equipment. The fine bubble generating device has a gas supply part having a cylindrical inner peripheral surface arranged inside a casing communicating with an air supply source, and forms an air-mixing flow path through which water to be treated flows in the gas supply part. The purification processing apparatus according to any one of claims 1 to 3, wherein the supply unit is made of a porous body or a porous body having micropores. The purification apparatus according to any one of claims 2 to 5, wherein the water flow device has a pump means in a pipe line upstream of the fine bubble generating device.

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