JP4675830B2 - Water treatment equipment - Google Patents

Water treatment equipment Download PDF

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JP4675830B2
JP4675830B2 JP2006153268A JP2006153268A JP4675830B2 JP 4675830 B2 JP4675830 B2 JP 4675830B2 JP 2006153268 A JP2006153268 A JP 2006153268A JP 2006153268 A JP2006153268 A JP 2006153268A JP 4675830 B2 JP4675830 B2 JP 4675830B2
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water
activated carbon
micro
nano bubble
adsorption tower
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JP2007319789A (en
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数美 中條
和之 坂田
和幸 山嵜
正紀 片岡
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シャープ株式会社
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage
    • Y02W10/15Aerobic processes

Description

The present invention relates to a water treatment apparatus, in particular, the organic substances contained in water, such as wastewater and drinking water as well as activated carbon adsorption treatment, waste water, water, to a water treatment device that Ru can be applied to any water pure. In addition, the present invention particularly adds micro-nano bubble generation aids to the water to be treated to efficiently generate micro-nano bubbles, activate microorganisms propagated on activated carbon, and completely remove organic matter adsorbed on activated carbon. relates decomposed water treatment apparatus, in particular, in order to reproduce the activated carbon, about activated carbon requires such have water treatment device taken out artificially activated carbon tower outside.

  Conventionally, as a biological activated carbon system in clean water with a small load of organic matter, there is a system that treats river water with activated carbon in a water purification plant. This system utilizes the fact that microorganisms propagate well on the activated carbon of the activated carbon adsorption tower when the organic matter load is small. In this system, microorganisms are propagated on the activated carbon of the activated carbon adsorption tower, and the organic matter adsorbed by the activated carbon is microbially decomposed to purify it. This system has the advantage of not requiring regeneration of the activated carbon.

  However, the above system is limited to a case where the organic load is small, and there is a problem that it cannot be applied to drainage with a large organic load. For this reason, the actual situation is that a biological activated carbon system for wastewater with a large organic load is desired.

  Under such circumstances, there have been recent attempts to apply nanobubbles to purified water.

  Conventionally, as a water purification technique using nanobubbles, there is a technique described in Japanese Patent Application Laid-Open No. 2004-121962 (Patent Document 1).

  This technology utilizes the characteristics of nanobubbles, such as reduced buoyancy, increased surface area, increased surface activity, generation of local high-pressure fields, and surface-active and bactericidal effects due to the realization of electrostatic polarization. is there.

  More specifically, in Patent Document 1, the above-described plurality of factors possessed by nanobubbles are related to each other, thereby realizing an adsorption function of dirt components, a high-speed cleaning function of an object surface, and a sterilization function. It is disclosed that it can be washed with high functionality and low environmental load, and purification of polluted water can be performed.

  Conventionally, as a method for generating nanobubbles, there is one described in Japanese Patent Application Laid-Open No. 2003-334548 (Patent Document 2).

  This method comprises a step of decomposing and gasifying a part of the liquid in the liquid, a step of applying ultrasonic waves in the liquid or a step of decomposing and gasifying part of the liquid, and a step of applying ultrasonic waves. Has been.

  Conventionally, as a waste liquid processing apparatus using microbubbles, there is a waste liquid processing apparatus using ozone microbubbles described in Japanese Patent Application Laid-Open No. 2004-321959 (Patent Document 3).

  In this apparatus, ozone gas generated from the ozone generator and waste liquid extracted from the lower part of the treatment tank are supplied to the microbubble generator via a pressure pump. This apparatus treats waste liquid by ventilating the generated ozone microbubbles into the waste liquid in the treatment tank through the opening of the gas blowing pipe.

  However, the apparatus using bubbles described in the above three publications is irrelevant to water purification or when activated carbon is used for water purification for the purpose of water purification. There is a problem that it is difficult to spontaneously regenerate activated carbon in the activated carbon adsorption tower.

  That is, conventionally, when activated carbon is used for wastewater treatment, as the activated carbon adsorbs organic matter with the passage of time, it is difficult to avoid the activated carbon from being absorbed and being broken through. In particular, when activated carbon is used as wastewater, there is a problem that the adsorption ability of activated carbon is extremely lowered after a certain period of time, and the adsorption ability of activated carbon breaks through. Moreover, it is difficult to avoid the activated carbon breaking through even when the organic load is large. For this reason, it is necessary to artificially remove the activated carbon that has become non-adsorbable from the activated carbon adsorption tower and regenerate it. Therefore, when a continuous drainage treatment is to be performed, it is necessary to install a spare activated carbon adsorption tower. Furthermore, in the conventional treatment method using activated carbon, it is necessary to extract the activated carbon or regenerate the activated carbon at another location.

  For this reason, the conventional apparatus and method avoid the problems of an increase in initial costs such as the installation of a spare activated carbon adsorption tower, and an increase in running costs due to the extraction of activated carbon and the regeneration of activated carbon at another location. There is a problem of wanting.

Moreover, since the inflow water quality frequently changes in the wastewater, it is desirable that the water quality at the outlet of the activated carbon adsorption tower is constant even if the quality of the inflow water to the activated carbon adsorption tower fluctuates. However, in the conventional technology, there is a limit to the adsorption capacity of activated carbon, and there is a problem that it is difficult to keep the water quality at the outlet of the activated carbon adsorption tower constant when the quality of water flowing into the activated carbon adsorption tower frequently changes. That is, there is a problem that an improvement in the capacity of the activated carbon adsorption facility is desired.
JP 2004-121962 A JP 2003-334548 A JP 2004-321959 A

An object of the present invention, it is possible to improve the adsorption capacity of the activated carbon, artificially no need to play the activated carbon, and is to provide a Ru excellent purification ability of water treatment apparatus. In addition, the present invention can particularly enhance the regeneration of activated carbon and the adsorption of organic matter on activated carbon by using the powerful microorganism regeneration disclosed by the present application, thereby improving the quality of treated water. that to achieve stabilization is to provide a can be Ru water treatment apparatus. Further, the present invention is particularly to provide a water quality even when the frequently changing, the water treatment apparatus that can be made substantially constant the quality of treated water in the treated water.

  Ordinary bubbles (bubbles) are bubbles that rise in water and eventually pop off and disappear on the surface. Microbubbles are bubbles with a diameter of 10 to several tens of micrometers, It is a bubble that shrinks and eventually disappears (complete dissolution). Nanobubbles are bubbles that are even smaller than microbubbles (bubbles having a diameter of several hundreds of nanometers or less) and can exist in water indefinitely. In the present specification, the micro-nano bubble is defined as a bubble in which the micro bubble described above and the nano bubble described above are mixed.

  Some organic fluorine compounds are chemically stable, and therefore once decomposed into the environment, some organic fluorine compounds cannot be decomposed in the environment and have a property that continues to exist in the environment indefinitely.

Since microswitch and purification ability is high Ru manner der to perform the decomposition of organic matter in microorganisms activated by nano bubbles, even undecomposable above organic fluorine compound allow disassembly process.

The water treatment apparatus of the present invention
An activated carbon adsorption tower filled with activated carbon inside,
To-be-treated water inflow mechanism for causing micronanobubble-containing to-be-treated water to be contained in treated water to flow into the activated carbon adsorption tower ,
A first control device for controlling the amount of treated water containing the micro / nano bubbles flowing into the activated carbon adsorption tower ;
The organic matter adsorbed on the activated carbon is propagated on the activated carbon and decomposed by microorganisms activated by the micro-nano bubbles ,
A first pit containing the treated water;
At least one micro / nano bubble generator for generating the micro / nano bubbles in the water to be treated contained in the first pit;
A filter for filtering the treated water or the treated water containing the micro-nano bubbles before flowing into the activated carbon adsorption tower;
A micro / nano bubble generation aid tank storing a micro / nano bubble generation aid,
A second control device for controlling the flow rate of the micro / nano bubble generation aid flowing out of the micro / nano bubble generation aid tank;
A second pit for containing water that has flowed out of the activated carbon adsorption tower and has passed through the activated carbon adsorption tower;
A water quality detection device for detecting the quality of the water after passing through the activated carbon adsorption tower housed in the second pit;
The a is characterized in Rukoto.

  According to the present invention, the organic matter in the treated water containing micro-nano bubbles adsorbed on the activated carbon is decomposed by the microorganisms activated by the micro-nano bubbles, so that the organic matter is compared with the case where the micro-nano bubbles are not used. The decomposition rate can be greatly increased. Therefore, the purification ability of the water to be treated can be significantly improved.

  Further, according to the present invention, the decomposition rate of the organic matter can be remarkably increased as compared with the case where the micro-nano bubbles are not used, and the organic matter adsorbed on the activated carbon can be substantially completely decomposed. Therefore, the activated carbon is spontaneously regenerated without excessively adsorbing organic substances on the surface of the activated carbon. Therefore, since it is not necessary to artificially regenerate the activated carbon, the running cost can be reduced.

Moreover, the water treatment apparatus of one Embodiment WHEREIN: The said 1st control apparatus WHEREIN: The said activated carbon so that the decomposition | disassembly rate of the said organic matter decomposed | disassembled by the said microorganisms becomes more than the adsorption rate of the said organic matter adsorb | sucked to the said activated carbon. that controls the water volume of the micro-nano bubble-containing water to be treated flowing into the adsorption tower.

  According to the embodiment, the first control device flows into the activated carbon adsorption tower so that the decomposition rate of the organic matter decomposed by the microorganism is equal to or higher than the adsorption rate of the organic matter adsorbed on the activated carbon. Since the amount of water to be treated containing the micro / nano bubbles is controlled, the spontaneous regeneration ability of the activated carbon can be further promoted.

Further , according to the present invention , the micronanobubble-containing treated water before flowing into the activated carbon adsorption tower or the suspended matter contained in the treated water is removed by a filter, and the suspended matter is removed by the filter. Since the treated water containing micro-nano bubbles after being introduced into the activated carbon adsorption tower, it is possible to suppress the activated carbon in the activated carbon adsorption tower from being clogged with floating substances. Therefore, the adsorption ability of the activated carbon organic matter in the activated carbon adsorption tower can be improved, and the organic matter can be efficiently decomposed.

In addition, according to the present invention , micro-nano bubbles can be efficiently generated by introducing the micro-nano bubble generation aid from the micro-nano bubble generation aid tank into the first pit. Moreover, since it has the water quality detection apparatus which detects the water quality of the water accommodated in the said 2nd pit, the water quality after the activated carbon adsorption tower passage can be detected, for example, the water after this activated carbon adsorption tower passage Based on the water quality, the amount of introduction of the micro / nano bubble generation aid can be controlled.

  In one embodiment, the water treatment apparatus communicates between the micro-nano bubble generating auxiliary agent tank and the first pit, and the micro-nano bubble generating auxiliary agent in the micro-nano bubble generating auxiliary agent tank is transferred to the first nano pit. A first water passage to be introduced into the pit is provided.

  Even if the water to be treated is water that is unlikely to generate micro-nano bubbles, micro-nano bubbles can be stably generated by adding a micro-nano bubble generation aid, and as a result, microorganisms can be surely obtained. Can be activated. According to the embodiment, since the micro / nano bubble generation aid can be introduced into the first pit, the micro / nano bubbles can be stably generated, and the microorganisms can be activated reliably. In addition, when a product having good microbial degradability is selected as the micro / nano bubble generation aid to be added, the micro / nano bubble generation aid that has finished its role by contributing to the generation of micro / nano bubbles is present in the activated carbon adsorption tower or the like. It can be almost completely degraded by microorganisms. Therefore, the micro / nano bubble generation aid does not remain in the treated water.

  In the water treatment apparatus according to an embodiment, the second control device controls the flow rate of the micro / nano bubble generation aid based on a signal from the water quality detection device.

  According to the said embodiment, the quantity of micro nano bubble generation adjuvant corresponding to the quality of the to-be-treated water can be added to the to-be-treated water. Therefore, since the amount of micro-nano bubbles generated can be adjusted based on the quality of the water to be treated, even when the quality of the water to be treated fluctuates frequently, the quality of the water after treatment should be made substantially constant. Can do.

  Moreover, the water treatment apparatus of one Embodiment has the adjustment part which the said micro nano bubble generator adjusts the generation amount of the said micro nano bubble, and adjusts the said adjustment part based on the signal from the said water quality detection apparatus. The control part controller which controls the said generation amount of the said micro nano bubble by is provided.

  According to the above embodiment, since the amount of micro-nano bubbles generated can be adjusted based on the quality of the water to be treated, even when the quality of the water to be treated frequently fluctuates, It can be made substantially constant.

  Moreover, the water treatment apparatus of one embodiment is located above the first pit, has a bottom through which water can pass, and an activated carbon layer water tank filled with activated carbon inside, and the above A second water passage through which the filter and the activated carbon adsorption tower communicate with each other and the treated water containing micro-nano bubbles filtered by the filter is introduced into the activated carbon adsorption tower; the filter; and the activated carbon layer water tank; The micro-nano bubbles filtered by the filter that flows into the activated carbon adsorption tower and the third water passage for introducing the treated water containing the micro-nano bubbles filtered by the filter into the activated carbon layer water tank A third control device for controlling the amount of water to be treated containing water and controlling the amount of water to be treated containing micro-nano bubbles filtered by the filter flowing into the activated carbon layer water tank, Water after the active carbon layer water tank passage passing through the is adapted to flow into the first pit.

  According to the said embodiment, at least one part of the water after filtering with a filter can be reintroduced into a 1st pit via an activated carbon layer water tank. That is, since the water to be treated can be circulated between the first pit, the filter, and the activated carbon layer water tank, the load on organic substances can be reduced. In addition, if the treated water containing micro / nano bubbles is introduced into the activated carbon layer water tank, the microorganisms breeding on the activated carbon in the activated carbon layer water tank can be activated and adsorbed on the activated carbon in this activated carbon layer water tank. Organic substances can be efficiently decomposed. Therefore, since the purification ability of the water to be treated can be improved, the water quality of the water after treatment can be prevented from deteriorating even when the organic matter load of the water to be treated before treatment is high, and activated carbon There is no need to artificially regenerate the activated carbon in the water tank.

  Moreover, the water treatment apparatus of one Embodiment is equipped with the net bag in which activated carbon was accommodated while being installed in the said 1st pit.

  According to the embodiment, since the net bag is provided in the first pit and the activated carbon is housed therein, the organic load can be reduced. In addition, the microorganisms propagating on the activated carbon in the mesh bag can be activated by the micro-nano bubbles, and the organic matter adsorbed on the activated carbon in the mesh bag can be efficiently decomposed. Therefore, since the purification ability of the water to be treated can be improved, the water quality after the treatment can be prevented from deteriorating even when the organic matter load of the water to be treated before treatment is high, and There is no need to artificially regenerate the activated carbon in the bag.

  Moreover, the water treatment apparatus of one Embodiment is filled with the string-type polyvinylidene chloride packing in the said activated carbon adsorption tower.

  According to the above embodiment, the organic matter can be decomposed by the microorganisms propagating in the string-type polyvinylidene chloride filler, so that compared to the case where the string-type polyvinylidene chloride filler is not present, The organic matter load of the water to be treated in the activated carbon adsorption tower can be reduced. Therefore, the purification ability can be improved.

  In particular, in the activated carbon adsorption tower, when the string-type polyvinylidene chloride packing is arranged upstream of the treated water from the activated carbon, it is pretreated with the microorganisms propagated in the string-type polyvinylidene chloride packing. Later, since the activated carbon and the water to be treated come into contact with each other, the load of organic substances on the activated carbon is reduced, and the water quality can be significantly improved. Furthermore, since the microorganisms propagated in the string-type polyvinylidene chloride filler can be moved to the activated carbon along the flow of the water to be treated containing micro-nano bubbles, the automatic regeneration ability of the activated carbon (spontaneous regeneration ability) Can be improved.

  Moreover, the water treatment apparatus of one Embodiment is filled with the ring-type polyvinylidene chloride packing in the said activated carbon adsorption tower.

  According to the above embodiment, the organic matter can be decomposed by the microorganisms propagating in the ring-type polyvinylidene chloride packing, so that the activated carbon adsorption compared with the case where the ring-type polyvinylidene chloride packing does not exist. The organic matter load of the water to be treated in the tower can be reduced. Therefore, the purification ability can be improved.

  In particular, in the activated carbon adsorption tower, when the ring-type polyvinylidene chloride packing is disposed upstream of the treated water from the activated carbon, after pretreatment with the microorganisms propagated in the ring-type polyvinylidene chloride packing, Since the activated carbon comes into contact with the water to be treated, the load of organic substances on the activated carbon is reduced, and the water quality can be greatly improved. In addition, since microorganisms propagated in the ring-type polyvinylidene chloride filler can be moved to activated carbon along the flow of treated water containing micro-nano bubbles, the automatic regeneration capability (spontaneous regeneration capability) of activated carbon is improved. Can be made.

  Moreover, the water treatment apparatus of one embodiment includes a plurality of the micro / nano bubble generators and an operating number controller that controls the number of the micro / nano bubble generators to be operated based on a signal from the water quality detection apparatus. .

  According to the above embodiment, since the number of micro-nano bubble generators operating based on the water quality after passing through the activated carbon adsorption tower can be controlled, even when the quality of the water to be treated fluctuates frequently. The water quality after passing through the activated carbon adsorption tower can be made to be almost constant.

  In one embodiment of the water treatment apparatus, the micro / nano bubble generation aid is a surfactant that is decomposed by the microorganism or an alcohol that is decomposed by the microorganism.

  According to the above embodiment, since the micro-nano bubble generation aid is a surfactant that is decomposed by the microorganism or an alcohol that is decomposed by the microorganism, the micro that has contributed to the generation of micro-nano bubbles has ended. The nanobubble generation aid can be decomposed by microorganisms present in the activated carbon adsorption tower or the like. And the amount of the micro / nano bubble generating aid remaining in the treated water can be made almost zero.

  According to the present invention, the organic matter in the treated water containing micro-nano bubbles adsorbed on the activated carbon is decomposed by microorganisms activated by the micro-nano bubbles, so that the decomposition rate of the organic matter is markedly higher than when the micro-nano bubbles are not used. The purification ability of the water to be treated can be greatly improved.

  Further, according to the present invention, the decomposition rate of the organic matter can be remarkably increased as compared with the case where the micro-nano bubbles are not used, and the organic matter adsorbed on the activated carbon can be substantially completely decomposed. Therefore, the activated carbon is spontaneously regenerated without excessively adsorbing organic substances on the surface of the activated carbon. Therefore, since it is not necessary to artificially regenerate the activated carbon, the running cost can be reduced.

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

(First embodiment)
Drawing 1 is a figure showing typically the water treatment equipment of a 1st embodiment of the present invention.

  This water treatment apparatus includes a first pit 1, a rapid filter 11, an activated carbon adsorption tower 12, a second pit 17, and a micro / nano bubble generating aid tank 13. The activated carbon adsorption tower 12 is filled with activated carbon, while the micro-nano bubble generating aid tank 13 is filled with a microorganism that is composed of a surfactant having a good microbial degradability, an alcohol having a good microbial degradability, or the like. Good micro / nano bubble generation aid is stored. In addition, the micronano bubble-containing treated water mentioned below is one in which micronano bubbles are contained in the treated water.

  The treated water containing micro-nano bubbles in the first pit 1 is pumped up by the first pit pump 8, and at least a part of the pumped treated water containing micro-nano bubbles is introduced into the rapid filter 11. It has become. Further, the water to be treated containing microbubbles flowing out from the outlet of the rapid filter 11 is introduced into the activated carbon adsorption tower 12. In addition, at least a part of the water that has flowed out of the activated carbon adsorption tower 12 and passed through the activated carbon adsorption tower 12 is introduced into the second pit 17. In this embodiment, the rapid filter 11 filters the water to be treated containing micro / nano bubbles including the micro / nano bubbles and the water to be treated. However, in the present invention, the filter is disposed, for example, before the first pit 1. The water to be treated before flowing into the first pit 1 may be filtered.

Inflow water as treated water to be treated is introduced into the first pit 1. Here, the inflow water includes drainage, clean water, reuse water at a factory, river water, ground water, and the like. In addition, the drainage includes not only raw water for drainage but also water after biological treatment of the wastewater, water after chemical treatment of the wastewater, water after physical treatment of the wastewater, and the like. That is, the waste water to be handled by the equipment of the present invention, as long as it can purify using the onset bright, either be one which even those untreated were processed better.

Further, the waste water is processed in equipment of the present invention also corresponds with the organic fluorine compound-containing wastewater. Some organic fluorine compounds are chemically stable, and therefore once decomposed into the environment, some organic fluorine compounds cannot be decomposed in the environment and have a property that continues to exist in the environment indefinitely. Wastewater that can be processed by equipment of the present invention, forever include waste water containing such organic fluorine compound in question to the current worldwide have properties that continue to exist in the environment.

  In the first pit 1, an underwater pump type micro / nano bubble generator 2, an underwater pump type micro / nano bubble generator 3, and an underwater pump type micro / nano bubble generator 4 are installed. In the present invention, it goes without saying that the number of submersible pump-type micro / nano bubble generators in the first pit may be set to a number other than three, that is, one, two, or four or more. The submersible pump type micro / nano bubble generators 2, 3, and 4 require air to generate micro / nano bubbles. Therefore, air is supplied to the submersible pump type micro / nano bubble generators 2, 3 and 4 from the air pipe 6 connected to the blower 5.

  Here, micro-nano bubbles are defined. Ordinary bubbles (bubbles) are bubbles that rise in water and eventually pop off and disappear on the surface. Microbubbles are bubbles with a diameter of 10 to several tens of micrometers, It is a bubble that shrinks and eventually disappears (complete dissolution). Nanobubbles are bubbles that are even smaller than microbubbles (bubbles having a diameter of several hundreds of nanometers or less) and can exist in water indefinitely. In the present invention, the micro / nano bubble is defined as a bubble in which the micro bubble described above and the nano bubble described above are mixed.

  A UV detector (ultraviolet absorption detector) 18 (UV is an abbreviation for Ultra Violet) 18 is installed in the second pit 17 as an example of a water quality detection device. The UV detector 18 measures the quality of water after passing through the activated carbon adsorption tower by measuring the concentration of organic matter in the treated water from the outlet of the activated carbon adsorption tower 12. Specifically, the UV detector 18 is composed of an automatic measuring device that measures the organic substance concentration in the water to be treated (drainage, clean water, etc.) using the ultraviolet absorbance. As the water quality detection device, a water quality detection device other than the UV detector such as a COD meter that detects COD (chemical oxygen demand) may be used instead of the UV detector.

  The operating number controller 34 controls the operating number of the submersible pump type micro / nano bubble generators 2, 3, 4 based on the signal from the UV detector 18 installed in the second pit 17. Specifically, data measured by the UV detector 18 is sent to a UV controller (ultraviolet controller) 19. When the UV controller 19 receives data from the UV detector 18, the UV controller 19 transmits a signal to the motor rotation number controller 20 as an adjustment unit controller and the operation number controller 34.

  When the operation number controller 34 receives a signal from the UV controller 19, the operation number controller 34 adjusts the signal to control the operation number of the submersible pump type micro / nano bubble generators 2, 3, and 4. In this embodiment, three submersible pump type micro / nano bubble generators are installed in the first pit 1 so that the number of submersible pump type micro / nano bubble generators can be adjusted from 1 to 3. On the other hand, upon receiving a signal from the UV controller 19, the motor rotation speed controller 20 adjusts the signal to rotate the motor rotation speed (rotation speed) of the motor when the submersible pump type micro / nano bubble generators 2, 3, and 4 are in operation. ) To control. The motor constitutes an adjustment unit. By controlling the operation number controller 34 and the motor rotation speed controller 20 as described above, the water quality in the second pit 17 is set to a water quality suitable for the purpose.

  It is confirmed that when the content of micro / nano bubbles in the treated water containing micro / nano bubbles is high, the activation of microorganisms propagating on the activated carbon is promoted, and the microorganisms decompose organic substances more and improve the quality of the treated water. It was. In view of this, when the organic substance concentration measured by the UV detector 19 is high and the water quality in the second pit 17 is worse than the target water quality, the motor rotation speed of the submersible pump type micro / nano bubble generators 2, 3, 4 is increased. Set to generate a lot of micro-nano bubbles. The maximum number of submersible pump-type micro / nano bubble generators 2, 3, and 4 is also used. In this way, the water purification capacity of the second pit 17 is increased.

  On the other hand, when the water quality is better than the target water quality, the motor rotation speed of the submersible pump type micro / nano bubble generators 2, 3, and 4 is set to be low, and the generation amount of micro / nano bubbles is made small. Also, the number of operating submersible pump micro / nano bubble generators 2, 3, and 4 is set to two or one depending on the setting. In this way, when the water quality of the second pit 17 is originally good, the operation cost of the water treatment device is reduced to realize the energy saving operation of the water treatment device.

  As a specific control method for the submersible pump type micro / nano bubble generators 2, 3, and 4, for example, there are the following methods.

  First, when the water quality of the second pit 17 is worse than the first reference water quality, which is a criterion for determining whether the water quality of the second pit 17 is the worst or the other, the submersible pump type The micro / nano bubble generator 2, the submersible pump type micro / nano bubble generator 3, and the submersible pump type micro / nano bubble generator 4 are operated, and the submersible pump type micro / nano bubble generator 2, submersible pump type micro / nano bubble generator 3, And the motor rotation speed of each submersible pump type micro nano bubble generator 4 is maximized.

  When the reference water quality for determining whether the water quality of the second pit 17 is normal or the second pit 17 is good is the second reference water quality, the water quality of the second pit 17 is If the water quality is better than the first reference water quality and worse than the second reference water quality, the submersible pump type micro / nano bubble generator 2, the submersible pump type micro / nano bubble generator 3, and the submersible pump type micro / nano bubble generator 4 are put into operation, and The motor rotation speeds of the submersible pump type micro / nano bubble generator 2, the submersible pump type micro / nano bubble generator 3, and the submersible pump type micro / nano bubble generator 4 are set around the rated speed.

  When the reference water quality for determining whether the water quality of the second pit 17 is good or the best water quality of the second pit 17 is the third reference water quality, the water quality of the second pit 17 is When the water quality is better than 2 standard water quality and worse than the 3rd water quality, the submersible pump type micro / nano bubble generator 2 and the submersible pump type micro / nano bubble generator 3 are put into operation, while the submersible pump type micro / nano bubble generator 4 is stopped. Put it in a state. Further, the motor rotation speeds of the submersible pump type micro / nano bubble generator 2 and the submersible pump type micro / nano bubble generator 3 are set in the vicinity of the rated rotation number.

  When the water quality of the second pit 17 is better than the third reference water quality, the submersible pump type micro / nano bubble generator 2 is put into an operating state, while the submersible pump type micro / nano bubble generator 3 and the submersible pump type micro / nano bubble are generated. Set the machine 4 to the stop state. Moreover, the motor rotation speed of the submersible pump type micro / nano bubble generator 2 is minimized.

  More roughly, the value of the UV detector 18 that detects the water quality in the second pit 17 is higher than the reference value that is the standard for the target water quality, and the water quality in the second pit 17 is high. If the water quality is lower than the standard water quality, the water to be treated in the first pit 1 is submerged by the submersible pump type micro / nano bubble generators 2, 3, and 4 by the three submersible pump type micro / nano bubble generators 2, 3, and 4. Supply micro-nano bubbles with maximum supply capacity.

  The treated water containing micro-nano bubbles is introduced into the rapid filter 11 by the first pit pump 8. Here, it is not always necessary to introduce all of the treated water pumped out by the first pit pump 8 into the rapid filter 11. That is, a part of the treated water pumped out by the first pit pump 8 may be returned and circulated to the first pit 1 by adjusting the valve 9 and the valve 10 constituting the first control device. That is, when reducing the amount of treated water, a part of the treated water pumped out by the first pit pump 8 may be returned and circulated to the first pit 1 via the return circulation piping line 50. .

  The rapid filter 11 removes suspended substances in the water to be treated. The rapid filter 11 plays a role of preventing the activated carbon in the activated carbon adsorption tower 12 from being blocked by floating substances. The treated water containing micro-nano bubbles is introduced into the activated carbon adsorption tower 12 after passing through the rapid filter 11. The organic matter in the treated water containing micro-nano bubbles is decomposed by microorganisms activated by the micro-nano bubbles propagated on the activated carbon after being adsorbed on the activated carbon in the activated carbon adsorption tower 12. By such a mechanism, organic substances on the surface of the activated carbon are decomposed and removed. As a result, the water to be treated is purified and the activated carbon is automatically regenerated. In FIG. 1, the first pit pump 8, the valve 10, the rapid filter 11, the pipe 65 for introducing the treated water containing micro-nano bubbles from the first pit 1 to the rapid filter 11, and the treated water containing micro-nano bubbles The pipe 66 for guiding the water from the rapid filter 11 to the activated carbon adsorption tower 12 constitutes the treated water inflow mechanism.

  Thus, in this embodiment, since the activated carbon filled in the activated carbon adsorption tower 12 is always repeatedly adsorbed and regenerated, it is not necessary to remove the activated carbon from the activated carbon adsorption tower 12 and regenerate it. Therefore, the running cost can be reduced, and at the same time, the preliminary activated carbon adsorption tower 12 is not necessary, so that the initial cost can be reduced. In addition, it contains micro-nano bubbles flowing into the activated carbon adsorption tower 12 so that the decomposition rate of the organic matter decomposed by the microorganisms is higher than the adsorption rate of the organic matter adsorbed on the activated carbon by the valves 9 and 10 constituting the first control device. Controlling the amount of water to be treated can further promote the spontaneous regeneration ability of the activated carbon.

  At least a part of the water flowing out from the outlet of the activated carbon adsorption tower 12 flows into the second pit 17 through the valve 16. A part of the water flowing out from the outlet of the activated carbon adsorption tower 12 may be returned and circulated to the first pit 1 through the valve 15 by adjusting the opening and closing of the valve 16 and the valve 17.

  In addition, when the generation state of the micro / nano bubbles by the submersible pump type micro / nano bubble generators 2, 3, and 4 in the first pit 1 is poor, the micro / nano bubble generation aid tank 13 is used to generate the micro / nano bubbles appropriately. The stored micro / nano bubble generation aid can be added into the first pit 1 via the micro / nano bubble generation aid tank metering pump 14 as the second control device. When a micro-nano bubble generation aid is added in the first pit 1, it is possible to generate extremely fine micro-nano bubbles that are much smaller than when no additive is added. The pipe 60 for guiding the micro / nano bubble generating aid from the outlet of the micro / nano valve generating aid tank 13 to the first bit 1 constitutes a first water passage. Further, the micro / nano bubble generation aid stored in the micro / nano bubble generation aid tank 13 is excellent in microbial degradability among the micro / nano bubble generation aids. Since the micro / nano bubble generation aid having excellent microbial degradability is used, the micro / nano bubble generation aid itself does not remain until the second pit 17. That is, the micro / nano bubble generation aid is completely microbially decomposed by the microorganisms propagated in the activated carbon adsorption tower 12 after the micro / nano bubbles are generated.

  The water treatment apparatus may have an automatic operation specification as in the present embodiment. In this case, based on the signal from the UV detector 18 that detects the quality of the treated water in the second pit 17, the motor speed of the motor of the micro / nano bubble generating aid tank metering pump 14 is controlled. Then, an appropriate amount of the micro / nano bubble generation aid is added. That is, when the water quality of the second pit 17 is poor, a lot of micro / nano bubble generation assistants are automatically added to generate a lot of micro / nano bubbles and activate microorganisms propagated on the activated carbon of the activated carbon adsorption tower 12. To completely decompose the adsorbed organic matter.

  The water quality of the second pit 17 is the set water quality (the discharge regulation value must be strictly observed. For example, when the treated water is drainage, the set water quality is not the water quality based on the discharge regulation value, If the water quality is clearer than the discharge regulation value and worse than the voluntary control value, the following procedures A, B and C are performed as necessary. . The water quality of the second pit 17 is improved from a bad state to a good state as compared with the set water quality by at least one of these A, B, and C procedures. Needless to say, if all of A, B, and C are carried out, the purification capacity is maximized.

  A. A micro / nano bubble generation aid is added to the first pit 1.

  B. The motor speed of the submersible pump type micro / nano bubble generator 2, 3, 4 is set to a high value.

  C. All three submersible pump type micro / nano bubble generators 2, 3, and 4 are operated.

  In addition, when the above-mentioned organic fluorine compound-containing wastewater is introduced into the water treatment apparatus of the first embodiment, the activated carbon in the activated carbon adsorption tower 12 adsorbs the organic fluorine compound, and then the microorganisms activated by the micro-nano bubbles are activated carbon. It was confirmed that it propagated in large quantities and decomposed organic fluorine compounds. Here, for example, as the organic fluorine compound, there is a surfactant. It was confirmed that the activated carbon well adsorbs the surfactant and the microorganism activated by the micro-nano bubbles strongly decomposes the organic fluorine compound physically adsorbed by the activated carbon.

  The submersible pump type micro / nano bubble generators 2, 3, and 4 may be of any manufacturer as long as they are commercially available. In the present embodiment, those of Nomura Electronics Co., Ltd. are adopted, but products other than Nomura Electronics Co., Ltd., such as Auratech Co., Ltd., may be used.

In the water treatment apparatus of the first embodiment, the capacity of the first pit 1 is about 4 m 3 , the capacity of the rapid filter 11 is 0.5 m 3 , the capacity of the activated carbon adsorption tower is 2 m 3 , and the capacity of the second pit 17 is The capacity of the 2 m 3 micro / nano bubble generating aid tank was set to 0.5 m 3 , the waste water was introduced, and the operation was performed for about 3 months.

  After operation, the concentration of TOC (total organic carbon) at the entrance to the first pit 1 and the concentration of TOC (total organic carbon) at the exit of the second pit 17 were measured, and the TOC removal rate was measured. It was.

According to the water treatment equipment of the first embodiment, since the regeneration of activated carbon can be simultaneously strong adsorption to organic activated carbon, activated carbon adsorption capacity can greatly improve the quality of water in the activated carbon adsorption tower outlet stable Can be made.

  Moreover, according to the water treatment apparatus of the first embodiment, since microorganisms are activated with micro-nano bubbles and propagated on activated carbon, the organic matter adsorbed by activated carbon can be almost completely decomposed with activated microorganisms. it can. Moreover, by controlling the amount of micro-nano bubbles, the activated carbon treatment capacity (the amount of activated carbon adsorbed and the amount of organic matter decomposed by activated microorganisms) can be controlled in proportion to the amount of micro-nano bubbles being controlled. Moreover, since the UV value of the final treated water is measured, the water quality is monitored, and feedback is performed to control the rotation speed of the motor of the submersible pump type micro / nano bubble generator, the quality of the final treated water can be stabilized. .

(Second Embodiment)
Drawing 2 is a figure showing typically the water treatment equipment of a 2nd embodiment of the present invention.

  The water treatment apparatus of the second embodiment is an activated carbon layer water tank that accommodates water to be treated containing micro-nano bubbles that did not flow into the activated carbon adsorption tower 12 after flowing out from the outlet of the rapid filter 11 at the top of the first pit 1. The point which provided 24 differs from the water treatment apparatus of 1st Embodiment. The pipe 61 that guides the water to be treated containing micro-nano bubbles from the outlet of the rapid filter 11 to the activated carbon adsorption tower 12 constitutes a second water passage, and contains micro-nano bubbles from the outlet of the rapid filter 11 to the activated carbon layer water tank 24. The pipe 62 for guiding the water to be treated constitutes a third water passage. As shown in FIG. 2, a part 63 of the pipe 61 also serves as a part of the pipe 62.

  In the water treatment device of the second embodiment, the same reference numerals are assigned to the same components as those of the water treatment device of the first embodiment, and the description thereof will be omitted. Moreover, in the water treatment apparatus of 2nd Embodiment, it abbreviate | omits description about the effect and modification which are common in the water treatment apparatus of 1st Embodiment, The structure and effect | action different from the water treatment apparatus of 1st Embodiment are omitted. Only the effect will be described.

  The activated carbon layer water tank 24 is filled with activated carbon. The activated carbon filled in the activated carbon layer water tank 24 forms an activated carbon layer 35. The bottom 25 of the activated carbon layer water tank 24 below the vertical direction is made of a porous plate. A synthetic resin net (not shown) is installed on the upper surface of the bottom portion 25 to prevent fine activated carbon from flowing out to the bottom portion 25. A water droplet 26 dropped through the activated carbon layer 35 and the bottom portion 25 is accommodated in the first pit 1.

  Moreover, the amount of water flow to the activated carbon adsorption tower 12 and the amount of water flow to the activated carbon layer water tank 24 are adjusted by the valve 21 and the valve 22 constituting the third control device. The ratio of the opening degree of the valve 21 and the valve 22 is determined by looking at the water quality in the second pit 17.

  According to the water treatment device of the second embodiment, not only the activated carbon adsorption tower 12 but also the activated carbon layer water tank 24 can decompose organic substances with microorganisms activated by micro-nano bubbles, so that the decomposition ability of organic substances is remarkably increased. Can be improved. Therefore, even when the organic matter load is high and the amount of activated carbon in the activated carbon adsorption tower 12 alone cannot sufficiently decompose the organic matter, the organic matter can be reliably decomposed.

  Further, according to the water treatment apparatus of the second embodiment, not only the activated carbon adsorption tower 12 but also the activated carbon layer water tank 24 is filled with activated carbon, and the activated carbon filled in the activated carbon layer water tank 24 forms the activated carbon layer 35. Therefore, a large amount of microorganisms activated by the micro-nano bubbles can be propagated on the activated carbon of the activated carbon layer 35, and the organic matter adsorbed by the activated carbon can be decomposed by the microorganisms. Therefore, since the activated carbon of the activated carbon layer 35 is spontaneously regenerated, it is not necessary to regenerate the activated carbon of the activated carbon layer 35 by removing the activated carbon from the activated carbon layer water tank 24 in the same manner as the activated carbon in the activated carbon adsorption tower 12.

(Third embodiment)
Drawing 3 is a figure showing typically the water treatment equipment of a 3rd embodiment of the present invention.

  In FIG. 3, reference numerals 29 and 30 denote perforated plates.

  The water treatment device of the third embodiment is that the net bag 27 filled with activated carbon 28 is installed in the first pit 1 of the water treatment device of the first embodiment. Is different.

  In the water treatment device of the third embodiment, the same reference numerals are assigned to the same components as the components of the water treatment device of the first embodiment, and description thereof is omitted. Moreover, in the water treatment apparatus of 3rd Embodiment, it abbreviate | omits description about the effect and modification which are common in the water treatment apparatus of 1st Embodiment, The structure and effect | action different from the water treatment apparatus of 1st Embodiment are omitted. Only the effect will be described.

  In the water treatment apparatus of the third embodiment, a net bag 27 filled with activated carbon 28 is installed in the first pit 1 where the submersible pump type micro-nano bubble generators 2, 3, and 4 are installed. Therefore, the activated carbon 28 in the mesh bag 27 can efficiently receive the micro / nano bubbles generated from any or all of the submersible pump type micro / nano bubble generators 2, 3, and 4. Therefore, the degree of activation of the microorganisms propagated on the activated carbon 28 is large, and the organic matter can be efficiently decomposed by the microorganisms propagated on the activated carbon 28. Moreover, since the organic substance treatment by the activated carbon 28 in the first pit 1 becomes the primary treatment, the organic substance treatment by the activated carbon charged in the activated carbon adsorption tower 12 can be set as the secondary treatment. That is, since organic treatment can be performed in two stages, organic treatment can be reliably performed.

(Fourth embodiment)
Drawing 4 is a figure showing typically the water treatment equipment of a 4th embodiment of the present invention.

  The water treatment apparatus of the fourth embodiment is different from the water treatment apparatus of the first embodiment in that the activated carbon adsorption tower 12 is filled with a string-type polyvinylidene chloride filling 31 in addition to activated carbon. .

  In the water treatment device of the fourth embodiment, the same reference numerals are assigned to the same components as those of the water treatment device of the first embodiment, and the description thereof will be omitted. Moreover, in the water treatment apparatus of 4th Embodiment, it abbreviate | omits description about the effect and modification which are common in the water treatment apparatus of 1st Embodiment, The structure and effect | action different from the water treatment apparatus of 1st Embodiment are omitted. Only the effect will be described.

  In the fourth embodiment, the string-type polyvinylidene chloride packing 31 is filled on the water inflow side in the activated carbon adsorption tower 12, while the activated carbon is filled on the water outflow side in the activated carbon adsorption tower 12. .

  According to the fourth embodiment, the water-inflow side in the activated carbon adsorption tower 12 is filled with the string-type polyvinylidene chloride packing 31, while the water outflow side in the activated carbon adsorption tower 12 is filled with activated carbon. Therefore, the organic matter contained in the water to be treated introduced into the activated carbon adsorption tower 12 is first microbially decomposed by the activated microorganisms propagating in the string-type polyvinylidene chloride packing, and then the organic matter load is reduced. In a reduced state, the activated carbon is adsorbed. Therefore, in addition to the more reliable adsorption of activated carbon, microorganisms can be propagated in the string-type polyvinylidene chloride filling 31 and the microorganisms can be transferred from the string-type polyvinylidene chloride filling 31 to the activated carbon. Can be made. Therefore, the organic matter adsorbed by the activated carbon can be microbially decomposed more reliably, and the purification can be promoted, and the spontaneous regeneration ability of the activated carbon can be greatly promoted, so that the activated carbon can be regenerated. There is no need to do it.

(Fifth embodiment)
FIG. 5 is a diagram schematically showing a water treatment apparatus according to a fifth embodiment of the present invention.

  The water treatment device of the fifth embodiment is different from the water treatment device of the first embodiment in that the activated carbon adsorption tower 12 is filled with a ring-type polyvinylidene chloride filler 31 in addition to activated carbon.

  In the water treatment device of the fifth embodiment, the same reference numerals are assigned to the same components as those of the water treatment device of the first embodiment, and the description thereof will be omitted. Moreover, in the water treatment apparatus of 5th Embodiment, it abbreviate | omits description about the effect and modification which are common in the water treatment apparatus of 1st Embodiment, The structure and effect | action different from the water treatment apparatus of 1st Embodiment are omitted. Only the effect will be described.

  In the fifth embodiment, the ring-type polyvinylidene chloride filling 31 is filled on the water inflow side in the activated carbon adsorption tower 12, while the activated carbon is filled on the water outflow side in the activated carbon adsorption tower 12.

  According to the fifth embodiment, the water-inflow side in the activated carbon adsorption tower 12 is filled with the ring-type polyvinylidene chloride packing 31, while the water outflow side in the activated carbon adsorption tower 12 is filled with activated carbon. Therefore, the organic matter contained in the water to be treated introduced into the activated carbon adsorption tower 12 is first microbially decomposed by the activated microorganisms propagating in the ring-type polyvinylidene chloride packing, and then the organic matter load is reduced. In this state, the activated carbon is adsorbed. Therefore, in addition to more reliable activated carbon adsorption, microorganisms can be propagated in the ring-type polyvinylidene chloride filling 31 and further, the microorganisms can be transferred from the ring-type polyvinylidene chloride filling 31 to the activated carbon. Can do. Therefore, the organic matter adsorbed by the activated carbon can be microbially decomposed more reliably, and the purification can be promoted, and the spontaneous regeneration ability of the activated carbon can be greatly promoted. There is no need to do it.

It is a figure which shows typically the water treatment apparatus of 1st Embodiment of this invention. It is a figure which shows typically the water treatment apparatus of 2nd Embodiment of this invention. It is a figure which shows typically the water treatment apparatus of 3rd Embodiment of this invention. It is a figure which shows typically the water treatment apparatus of 4th Embodiment of this invention. It is a figure which shows typically the water treatment apparatus of 5th Embodiment of this invention.

DESCRIPTION OF SYMBOLS 1 1st pit 2,3,4 The submersible pump type micro nano bubble generator 5 Blower 6 Air piping 7 Water flow 8 1st pit pump 9,15,16,21,22 Valve 10 Valve 11 Rapid filter 12 Activated carbon adsorption tower 13 Micro Nano bubble generation aid tank 14 Micro nano bubble generation aid tank metering pump 17 Second pit 18 UV detector 19 UV controller
20 Motor speed controller 23 Sprinkling pipe 24, 35 Activated carbon layer 25, 29, 30 Perforated plate 26 Water droplet 27 Mesh bag 28 Activated carbon 31 String-type polyvinylidene chloride filler 32 Ring type polyvinylidene chloride filler 33 Signal line 34 Operation Unit controller

Claims (7)

  1. An activated carbon adsorption tower filled with activated carbon inside,
    To-be-treated water inflow mechanism for causing micronanobubble-containing to-be-treated water to be contained in treated water to flow into the activated carbon adsorption tower,
    A first control device for controlling the amount of treated water containing the micro / nano bubbles flowing into the activated carbon adsorption tower;
    With
    The organic matter adsorbed on the activated carbon is propagated on the activated carbon and decomposed by microorganisms activated by the micro-nano bubbles,
    A first pit containing the treated water;
    At least one micro / nano bubble generator for generating the micro / nano bubbles in the water to be treated contained in the first pit;
    A filter for filtering the treated water or the treated water containing micro-nano bubbles before flowing into the activated carbon adsorption tower;
    A micro / nano bubble generation aid tank storing a micro / nano bubble generation aid,
    A second control device for controlling the flow rate of the micro / nano bubble generation aid flowing out of the micro / nano bubble generation aid tank;
    A second pit containing the water that has flowed out of the activated carbon adsorption tower and passed through the activated carbon adsorption tower;
    A water quality detection device for detecting the quality of the water after passing through the activated carbon adsorption tower accommodated in the second pit;
    A water treatment apparatus comprising:
  2. The water treatment apparatus according to claim 1 ,
    A first water passage is provided that communicates between the micro-nano bubble generation aid tank and the first pit and introduces the micro-nano bubble generation aid in the micro-nano bubble generation aid tank into the first pit. Water treatment device characterized by.
  3. The water treatment apparatus according to claim 1 ,
    The said 2nd control apparatus controls the flow volume of the said micro nano bubble generation adjuvant based on the signal from the said water quality detection apparatus, The water treatment apparatus characterized by the above-mentioned.
  4. The water treatment apparatus according to claim 1 ,
    The micro-nano bubble generator has an adjustment unit that adjusts the generation amount of the micro-nano bubbles,
    A water treatment apparatus comprising: an adjustment unit controller that controls the generation amount of the micro / nano bubbles by adjusting the adjustment unit based on a signal from the water quality detection device.
  5. The water treatment apparatus according to claim 1 ,
    A plurality of the micro-nano bubble generators,
    A water treatment apparatus comprising: an operating number controller for controlling the number of the micro / nano bubble generators to be operated based on a signal from the water quality detection apparatus.
  6. The water treatment apparatus according to claim 1 ,
    The micro-nano bubble generating aid is a surfactant that is decomposed by the microorganism or an alcohol that is decomposed by the microorganism.
  7. The water treatment apparatus according to claim 1 ,
    An activated carbon layer water tank that is located above the first pit, has a bottom through which water can pass, and is filled with activated carbon inside,
    A second water passage that communicates the filter with the activated carbon adsorption tower and introduces the water to be treated containing the micro / nano bubbles filtered through the filter into the activated carbon adsorption tower;
    A third water passage that communicates the filter with the activated carbon layer water tank and introduces the treated water containing the micro-nano bubbles filtered by the filter into the activated carbon layer water tank;
    Controlling the amount of the treated water containing micro-nano bubbles filtered by the filter flowing into the activated carbon adsorption tower, and treating the treated water containing micro-nano bubbles filtered by the filter flowing into the activated carbon layer tank A third control device for controlling the amount of water,
    The water after passing through the bottom and passing through the activated carbon layer water tank flows into the first pit.
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JP5097024B2 (en) * 2008-06-17 2012-12-12 シャープ株式会社 Water treatment apparatus and water treatment method
JP5261124B2 (en) * 2008-10-10 2013-08-14 シャープ株式会社 Nanobubble-containing liquid manufacturing apparatus and nanobubble-containing liquid manufacturing method
JP4870174B2 (en) * 2009-01-19 2012-02-08 シャープ株式会社 Water treatment apparatus and water treatment method
JP5275121B2 (en) * 2009-04-16 2013-08-28 シャープ株式会社 Exhaust gas treatment equipment containing volatile organic compounds
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