JP4879925B2 - Water treatment apparatus and water treatment method - Google Patents

Water treatment apparatus and water treatment method Download PDF

Info

Publication number
JP4879925B2
JP4879925B2 JP2008043604A JP2008043604A JP4879925B2 JP 4879925 B2 JP4879925 B2 JP 4879925B2 JP 2008043604 A JP2008043604 A JP 2008043604A JP 2008043604 A JP2008043604 A JP 2008043604A JP 4879925 B2 JP4879925 B2 JP 4879925B2
Authority
JP
Japan
Prior art keywords
water
tank
carrier
treated water
treatment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2008043604A
Other languages
Japanese (ja)
Other versions
JP2009195887A (en
Inventor
数美 中條
和幸 山嵜
耕治 岩田
政彦 徳安
登美男 相澤
Original Assignee
シャープ株式会社
野村マイクロ・サイエンス株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by シャープ株式会社, 野村マイクロ・サイエンス株式会社 filed Critical シャープ株式会社
Priority to JP2008043604A priority Critical patent/JP4879925B2/en
Publication of JP2009195887A publication Critical patent/JP2009195887A/en
Application granted granted Critical
Publication of JP4879925B2 publication Critical patent/JP4879925B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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 and a water treatment method capable of removing contaminants such as organic substances from treated water.

  Conventionally, techniques for removing substances such as organic substances from liquids have been used in various fields. For example, in waste liquid treatment, a technique that utilizes the ability of microorganisms to decompose substances is used to remove various substances in waste water.

  For example, conventionally, a wastewater treatment apparatus using a microorganism-immobilized gel carrier has been used (for example, see Patent Document 1). The wastewater treatment apparatus uses a sludge separation facility that employs a submerged membrane filtration method and a sludge separation facility that employs a sedimentation tank method. In the wastewater treatment apparatus, for example, a polyvinyl alcohol-based hydrogel is used as the microorganism-immobilized gel carrier.

  Conventionally, a wastewater treatment method using a plurality of tanks having different functions has been used (see, for example, Patent Document 2). In the wastewater treatment method, the wastewater is subjected to various treatments in the order of the aeration tank in which the carrier is flowing, the first activated sludge tank, the second activated sludge tank, and the settling tank. In the wastewater treatment method, for example, a polyvinyl alcohol crosslinked gel carrier is used as the carrier.

  Conventionally, wastewater treatment tanks using a carrier in which microorganisms are immobilized and a wastewater treatment apparatus using a membrane module for filtering treated water flowing out of the wastewater treatment tank have been used (for example, Patent Documents). 3). In the wastewater treatment apparatus, a polyvinyl alcohol-based hydrogel is used as the carrier.

  On the other hand, it is conventionally known that bubbles having a small diameter have various actions, and attempts are currently being made to use such bubbles in various fields.

  The bubbles can be classified into microbubbles, micronanobubbles and nanobubbles according to their diameters. Specifically, the microbubble is a bubble having a diameter of 10 μm to several tens of μm at the time of its generation, the micro-nano bubble is a bubble having a diameter of several hundred nm to 10 μm at the time of its generation, and the nanobubble is Bubbles having a diameter of several hundred nm or less at the time of generation. Note that a part of the microbubble may be changed to a micro / nanobubble by the contraction movement after the generation. Some microbubbles shrink in water and eventually disappear. On the other hand, nanobubbles have the property that they can exist in a liquid for a long period of time.

  For example, conventionally, various utilization methods of nanobubbles and various apparatuses utilizing nanobubbles are known (see, for example, Patent Document 4). More specifically, in Patent Document 4, nanobubbles exhibit surface activity and bactericidal action by reducing buoyancy, increasing surface area, increasing surface activity, generating a local high-pressure field, or realizing electrostatic polarization. It is described. Furthermore, Patent Document 4 describes a technique for cleaning various objects and a technique for purifying polluted water using the surface active action and bactericidal action of nanobubbles. Furthermore, Patent Document 4 describes a method for recovering fatigue of a living body using nanobubbles. In Patent Document 4, nanobubbles are produced by electrolyzing water and applying ultrasonic vibration to the water.

  Conventionally, a method for producing nanobubbles using a liquid as a raw material is known (see, for example, Patent Document 5). In the liquid, the production method includes 1) a step of decomposing and gasifying a part of the liquid, 2) a step of applying ultrasonic waves to the liquid, or 3) a step of decomposing and gasifying a part of the liquid; A step of applying ultrasonic waves to the liquid. It is described that an electrolysis method or a photolysis method can be used as a step of decomposing and gasifying a part of the liquid.

Conventionally, a waste liquid treatment apparatus using microbubbles (ozone microbubbles) made of ozone gas has been used (see, for example, Patent Document 6). In the waste liquid treatment apparatus, microbubbles made of ozone gas are produced by mixing ozone gas produced by an ozone generator and waste liquid using a pressure pump. And when the said microbubble reacts with the organic substance in a waste liquid, the organic substance in a waste liquid is oxidized and decomposed | disassembled. In addition, a cleaning apparatus using microbubbles has been conventionally used, and the apparatus is used for cleaning metal to which machine oil or the like adheres, cleaning oysters, or cleaning a human body during bathing.
JP 2007-185598 A (published July 26, 2007) JP 2001-145894 A (released May 29, 2001) Japanese Patent Laid-Open No. 11-42497 (published February 16, 1999) JP 2004-121962 A (published April 22, 2004) JP 2003-334548 A (published on November 25, 2003) JP 2004-321959 A (published November 18, 2004)

  However, the conventional water treatment apparatus and the water treatment method have a problem that contaminants (for example, organic substances) contained in the treated water cannot be effectively removed.

  For example, in a conventional water treatment apparatus and water treatment method using microorganisms for treating wastewater, when air is supplied to a carrier on which microorganisms are immobilized, for example, a bubble having a large particle diameter is used. As air is supplied. As a result, since a sufficient amount of air cannot be supplied to the microorganisms, a sufficient amount of microorganisms (for example, aerobic microorganisms) cannot propagate on the surface of the carrier. The problem is more serious when the carrier is provided with pores. That is, since the bubble particle size is large, the bubble cannot enter the inside of the pore, and as a result, the microorganisms cannot propagate inside the pore. As a result, the conventional water treatment method and the water treatment method have a problem in that contaminants contained in the treated water cannot be effectively removed because the amount of microorganisms that can be immobilized on the surface of the carrier is small. is doing.

  Further, as described above, in the conventional water treatment apparatus and water treatment method using microorganisms, a sufficient amount of air could not be supplied to the microorganisms immobilized on the carrier. For example, the substance decomposing ability of aerobic microorganisms cannot be fully exhibited. It should be noted that those skilled in the art can easily understand that the problem is more serious when the carrier is provided with pores. As a result, the conventional water treatment method and the water treatment method cannot sufficiently activate the microorganisms immobilized on the surface of the carrier, and therefore cannot effectively remove contaminants contained in the treated water. Has the problem.

  In addition, since the conventional water treatment apparatus and water treatment method using microorganisms basically depend only on the substance decomposition ability of microorganisms, in order to sufficiently oxidize organic substances, etc., large-capacity microorganisms A tank is required. As a result, the conventional water treatment apparatus and water treatment method have a problem that the apparatus becomes large and requires enormous costs.

  Moreover, in the conventional water treatment apparatus and water treatment method using microorganisms, various stirring apparatuses are used to prevent the carrier from being precipitated in the tank. However, for example, if the amount of the carrier in the tank is increased, these agitators cannot sufficiently agitate the carrier. That is, the conventional water treatment apparatus and water treatment method have a problem that the carrier cannot be sufficiently stirred, particularly as the amount of the carrier increases.

  Further, as described above, conventional water treatment apparatuses and water treatment methods using microorganisms or bubbles do not have sufficient ability to remove contaminants in the treated water. Therefore, the conventional water treatment apparatus and water treatment method can effectively remove hardly decomposable substances typified by organic fluorine compounds such as perfluorooctasulfonic acid (PFOS) or perfluorooctanoic acid (PFOA). It has the problem that it cannot be done.

  This invention is made | formed in view of the said conventional problem, Comprising: The objective is to provide the water treatment apparatus and water treatment method which can remove effectively the contaminant contained in treated water.

As a result of intensive studies in view of the above problems, the present inventors have found the following 1) to 6) and have completed the present invention. In other words,
1) After containing micro-nano bubbles or nano bubbles in the treated water, the treated water is introduced into a tank filled with a carrier made of polyvinyl alcohol having pores. The micro-nano bubbles or nano-bubbles are attached to the carrier, whereby the microorganisms immobilized on the surface of the single unit are more activated. ) Improve,
2) After containing micro-nano bubbles or nano bubbles in the treated water, the treated water is introduced into a tank filled with a carrier made of polyvinyl alcohol having pores. In addition, microorganisms are propagated on the surface of the carrier. Then, by alternately changing the state in the tank to an aerobic state or an anaerobic state, it becomes possible to grow both aerobic microorganisms and anaerobic microorganisms in the tank. Improve the processing efficiency (for example, decomposition efficiency) of organic substances contained in water. At this time, since the carrier has pores, aerobic microorganisms mainly propagate in the surface layer of the carrier, and anaerobic microorganisms mainly propagate in the pores of the carrier. In other words, since a large amount of aerobic bacteria and anaerobic bacteria can be grown at the same time, it is possible to further improve the treatment efficiency of organic substances contained in the treated water,
3) The amount of excess sludge generated from the treatment equipment is small compared with conventional treatment equipment by simultaneously growing a large amount of aerobic microorganisms activated by micro-nano bubbles or nanobubbles and anaerobic microorganisms,
4) The carrier made of polyvinyl alcohol has a specific gravity of about 1.025 (the particle diameter can be set to 4 mm, for example). Moreover, micro-nano bubbles or nano bubbles are likely to adhere to the surface of the carrier. And if a bubble adheres to the surface of the said support | carrier, the specific gravity of the composite_body | complex of a support | carrier and a bubble will become close to 1, As a result, the said composite_body | complex can float easily in treated water. In other words, the composite does not easily settle on the bottom of the tank and does not float on the surface of the treated water. As a result, it becomes possible to flow the carrier in the tank with a small stirring energy,
5) As a method for rationally treating an organic fluorine-based compound (for example, PFOS, PFOA), there is a conventional activated carbon adsorption method. However, since there are not only organic fluorine compounds but also other organic substances in the treated water, this method has a problem that activated carbon breaks through in a short period of time, and as a result, it is necessary to replace the activated carbon in a short period of time. ing. Therefore, after micronano bubbles or nanobubbles are contained in the organic fluorine compound-containing water, the organic fluorine compound-containing water is introduced into a tank filled with a carrier made of polyvinyl alcohol having pores. Thereby, organic substances other than the organic fluorine compound in the treated water are treated (for example, decomposed), and as a result, the lifetime of the activated carbon for mainly adsorbing the organic fluorine compound can be extended,
6) Micro-nano bubbles and nano bubbles can generate free radicals, and organic substances can be oxidized by the free radicals. Micro-nano bubbles and nano-bubbles can activate microorganisms, and contaminants in the treated water (for example, organic substances such as organic fluorine compounds) can be efficiently biologically treated by the microorganisms. And processing efficiency of the organic matter etc. which are contained in treated water can be further improved by combining the above-mentioned oxidation treatment and biological treatment.

  In order to solve the above problems, the water treatment apparatus of the present invention is a bubble generating means for generating micro-nano bubbles or nano bubbles in the treated water, a treatment tank for introducing the treated water after the generation of the micro-nano bubbles or nano bubbles, and A support made of polyvinyl alcohol provided so as to be able to come into contact with the treated water introduced into the treatment tank, wherein the support has pores and microorganisms are immobilized on the support. It is characterized by that.

  According to the said structure, after the micro nano bubble or nano bubble generate | occur | produces in treated water, the said treated water contacts the said support | carrier. At this time, since the pores are provided in the carrier, the surface area of the carrier can be increased. In other words, a scaffold for growing microorganisms can be increased. The carrier is made of polyvinyl alcohol. Since polyvinyl alcohol has good adhesion and adhesion to microorganisms, according to the above configuration, many microorganisms can be immobilized on the surface of the carrier. That is, according to the said structure, more microorganisms can be more reliably fix | immobilized on the support | carrier surface.

  Moreover, according to the said structure, micro nano bubble or nano bubble contains in treated water. Since the bubbles are small in size, they can easily diffuse into the pores. Micro-nano bubbles and nano-bubbles have a property of being easily adsorbed on a carrier made of polyvinyl alcohol. Therefore, according to the said structure, sufficient gas (for example, oxygen etc.) can be supplied with respect to microorganisms with the bubble adsorb | sucked on the support | carrier surface. Therefore, according to the said structure, the proliferation activity and substance decomposition activity of microorganisms can be raised.

  Moreover, as described above, micro-nano bubbles and nano-bubbles have a property of being easily adsorbed on a carrier made of polyvinyl alcohol. Since the specific gravity of polyvinyl alcohol is about 1.025, the specific gravity of the complex of the carrier and the gas becomes close to 1 when the gas adheres to the carrier. That is, the complex exhibits a property that it is difficult to settle at the bottom of the treatment tank. Therefore, according to the above configuration, since the carrier can be easily stirred, gas can be supplied satisfactorily to the microorganisms immobilized on the surface of the carrier and introduced into the treatment tank. When the treated water is made anaerobic, the microbial growth environment can be easily changed to anaerobic conditions.

  Moreover, according to the said structure, a micro nano bubble or a nano bubble generate | occur | produces in process water. Since micro-nano bubbles and nano bubbles can generate free radicals, according to the above configuration, contaminants contained in the treated water can be oxidatively decomposed by the free radicals.

  From the above, according to the above configuration, contaminants contained in the treated water can be effectively removed.

  In the water treatment apparatus of the present invention, the pore diameter is preferably about 20 μm.

  According to the said structure, the hole diameter of the pore provided in the said support | carrier is small. Therefore, according to the above configuration, since the surface area of the carrier can be increased, the amount of microorganisms that can be immobilized on the surface of the carrier can be increased. As a result, according to the above configuration, contaminants contained in the treated water can be effectively removed.

  In the water treatment apparatus of the present invention, in the treatment tank, a first air diffuser for discharging gas to the treatment water introduced into the treatment tank, and the treatment introduced into the treatment tank. Stirring means for stirring water and generating a water flow is preferably provided.

  According to the said structure, the support | carrier in the said processing tank can be easily stirred with the gas discharged from the 1st aeration means, and the water flow produced by the stirring means. That is, when the inside of the treatment tank is in an aerobic condition, a gas (for example, oxygen) can be supplied to the treated water by discharging the gas from the first air diffuser. The carrier in the treatment tank can be stirred. On the other hand, when the inside of the treatment tank is subjected to anaerobic conditions, the carrier in the treatment tank can be stirred by the stirring means. In addition, what is necessary is just to stop the supply to the said processing tank, for example, when setting the inside of the said processing tank to anaerobic conditions. Since oxygen in the treatment tank is consumed by microorganisms, as a result, the treatment tank gradually changes to anaerobic conditions. Moreover, when making the inside of the said processing tank into an aerobic condition and making the flow state in the said processing tank into the maximum, what is necessary is just to operate both the said 1st air diffusion means and the said stirring means. Thereby, for example, even if the inflow concentration of factory wastewater or the like into the treatment tank increases rapidly, the factory wastewater can be efficiently treated by rapidly improving the treatment efficiency in the treatment tank. As described above, according to the above configuration, the carrier in the treatment tank can be easily stirred regardless of whether the treatment water in the treatment tank is in an aerobic condition or an anaerobic condition. Moreover, the carrier is made of polyvinyl alcohol. It is possible to immobilize and grow both aerobic and anaerobic microorganisms on the surface of polyvinyl alcohol. Therefore, according to the said structure, while being able to draw out the substance degradation capability of the microorganisms fix | immobilized on the surface of the said carrier to the maximum, the contaminant contained in treated water can be removed effectively.

  In the water treatment apparatus of the present invention, both the first air diffuser and the agitator are provided in a cylindrical draft, and the two openings of the draft are respectively the bottom of the treatment tank or the It is preferable to arrange so as to face the water surface of the treated water introduced into the treatment tank.

  According to the said structure, the direction of the water flow produced | generated by a 1st aeration means and a stirring means can be prescribed | regulated. As a result, the carrier in the treatment tank can be stirred more effectively.

  In the water treatment apparatus of the present invention, it is preferable that the agitation means is disposed closer to the bottom surface of the treatment tank than the first air diffusion means in the draft.

  According to the above configuration, an upward water flow can be generated in the draft by the first air diffuser. At this time, since the stirring means is disposed below the first aeration means, the water flow generated by the first aeration means is not hindered by the stirring means. Moreover, if an upward water flow is generated by the stirring means, the water flow generated by the first air diffusion means can be enhanced. On the other hand, if a downward water flow is generated by the stirring means, a water flow in the opposite direction to the water flow generated by the first air diffusion means can be generated. Therefore, according to the said structure, a water flow can be efficiently generated in the said processing tank.

  In the water treatment apparatus of the present invention, it is preferable that the stirring means generate a water flow toward the bottom surface of the treatment tank.

  According to the above configuration, it is possible to generate a water flow in a direction opposite to the water flow generated by the first air diffuser. Therefore, according to the said structure, a water flow can be efficiently generated in the said processing tank (especially the bottom part side of a processing tank).

  In the water treatment apparatus of the present invention, the stirring means is preferably an underwater aerator.

  According to the said structure, the treated water in a processing tank can be stirred by both stirring by a water flow and stirring by air aeration. As a result, the stirring effect of the treated water can be increased and gas can be supplied into the treated water.

  In the water treatment apparatus of the present invention, based on the oxidation-reduction potentiometer for measuring the oxidation-reduction potential of the treated water introduced into the treatment tank, and the measurement result of the oxidation-reduction potentiometer, It is preferable to include a sequencer for adjusting the amount of gas discharged by the gas means and the water flow rate generated by the stirring means.

  According to the above configuration, the oxidation-reduction potential of the treated water introduced into the treatment tank is measured by the oxidation-reduction potentiometer. As a result, it can be known whether the treated water is in an aerobic condition or an anaerobic condition. And based on the measurement result, if the operation of the first aeration means and the agitation means is controlled via the sequencer, the inside of the treatment tank is set to either an aerobic condition or an anaerobic condition. Can do. For example, when the inside of the treatment tank is set to an aerobic condition, a gas (for example, oxygen) may be discharged by the first air diffuser. On the other hand, when the inside of the treatment tank is set to an anaerobic condition, for example, the operation of the first air diffuser is stopped and a water flow is generated by the agitator.

  In the water treatment apparatus of the present invention, the treatment tank is preferably provided with a lid.

  According to the said structure, the treated water in the said processing tank can be isolated from an external environment. For example, when the inside of the processing tank is set to an anaerobic condition, the anaerobic condition in the processing tank can be controlled more strictly.

  In the water treatment apparatus of the present invention, it is preferable that the carrier is provided to be flowable in the treatment tank.

  According to the said structure, the said support | carrier and the said treated water contact evenly. Moreover, according to the said structure, a micro nano bubble or a nano bubble tends to adhere on the surface of the said support | carrier. That is, according to the above configuration, the surface of the carrier can be more reliably set to an aerobic condition, so that more aerobic microorganisms can be propagated on the surface of the carrier. In addition, when processing water mainly using aerobic microorganisms, the inflow load (for example, BOD load or COD load etc.) of a processing water can be set high. As a result, according to the above configuration, the treated water can be treated more effectively.

  In the water treatment apparatus of the present invention, it is preferable that a part of the carrier is provided to be able to flow in the treatment tank, and the rest of the carrier is provided to be fixed in the treatment tank.

  According to the said structure, the support | carrier which can be flowed contacts with treated water without a bias | inclination, and the support | carrier currently fix | immobilized produces a bias | inclination in a contact with treated water. That is, since the carrier that can flow is in contact with more oxygen, aerobic microorganisms mainly propagate on the surface of the carrier. On the other hand, since the immobilized carrier has less contact with oxygen, anaerobic microorganisms mainly grow on the surface of the carrier (particularly, the carrier surface in the pores). That is, according to the said structure, the said treated water can be more effectively processed with both an aerobic microorganism and an anaerobic microorganism. That is, according to the above configuration, more anaerobic microorganisms can be propagated.

  In the water treatment apparatus of the present invention, it is preferable that second aeration means for discharging gas to the treated water introduced into the treatment tank is provided on the bottom surface of the treatment tank.

  According to the said structure, a water flow can be generated in the bottom part of the said processing tank with the gas or bubble containing water discharged from a 2nd aeration means. That is, the carrier present at the bottom of the treatment tank can be effectively stirred. And since more oxygen can be supplied with respect to the microorganisms fix | immobilized on the surface of a support | carrier, the contaminant contained in a treated water can be processed more effectively.

  In the water treatment apparatus of the present invention, it is preferable that the bubble generating means is a submersible pump type bubble generator.

  The submersible pump type bubble generator can generate, for example, the largest micro-nano bubbles because of the bubble generation mechanism. Further, since the submersible pump type bubble generator requires the largest amount of air, it can generate a large amount of bubbles. Therefore, according to the said structure, since a lot of micro nano bubbles or nano bubbles can be generated in treated water, the contaminant contained in treated water can be processed under more aerobic conditions.

  In the water treatment apparatus of the present invention, the shape of the cross section of the treatment tank is a quadrangle having a first side having a length of a (m) and a second side having a length of b (m). And the depth in the longitudinal direction of the treatment tank is defined by c (m), and the ratios indicated by c: a and c: b are both 1: 1.0 to 1.3. Preferably there is.

  According to the said structure, since the treated water in the said processing tank can be effectively flowed, it can prevent that the said support | carrier settles. As a result, the contaminants contained in the treated water can be treated more effectively.

  In the water treatment device of the present invention, the treatment tank is provided with an opening for discharging treated water introduced into the treatment tank, and the opening is isolated from the carrier by a filtration filter. preferable.

  According to the said structure, the support | carrier in the said processing tank can prevent flowing out of a processing tank through the said opening.

  In the water treatment apparatus of the present invention, it is preferable that gas is discharged by the third air diffuser toward the filtration filter.

  According to the said structure, since the said support | carrier adhering to the surface of the said filter can be peeled, the treated water in the said processing tank can be efficiently flowed out of a processing tank.

  In the water treatment apparatus of the present invention, the inner surface of the treatment tank is provided with a convex portion protruding toward the center of the cross section of the treatment tank, and the opening is provided above the convex portion. Preferably it is.

  According to the said structure, the flow of the treated water in the said processing tank can be prevented by the said convex part. In other words, the environment in the treatment tank can be divided into an aerobic condition or an anaerobic condition with the convex portion as a boundary. For example, the environment in the processing tank above the convex part can be set to an aerobic condition, and the environment in the processing tank below the convex part can be set to an anaerobic condition. . As a result, aerobic microorganisms can be grown on the upper side of the treatment tank and anaerobic microorganisms can be grown on the lower side of the treatment tank. And by breeding both aerobic microorganisms and anaerobic microorganisms, the types of contaminants that can be treated by the water treatment apparatus of the present invention increase, and digestion of microbial sludge by breeding anaerobic microorganisms. As a result, the generation of excess sludge can be reduced. Moreover, according to the said structure, since the flow direction of process water can be changed, it can prevent that the said support | carrier flows out from the opening provided in the processing tank.

  In the water treatment apparatus of the present invention, it is preferable that the shape of the vertical section of the convex portion is a triangle.

  According to the said structure, the flow of the treated water in the said processing tank can be prevented by the said convex part.

  In the water treatment apparatus of the present invention, it is preferable that a rapid filtration tower or an activated carbon adsorption tower into which the treated water in the treatment tank is introduced is provided.

  According to the said structure, the contaminant contained in process water can be removed more reliably. For example, it is preferable to connect an activated carbon adsorption tower after the rapid filtration tower. In this case, before the treated water is introduced into the activated carbon adsorption tower, suspended substances in the treated water can be removed in advance. That is, suspended solids adhering to the activated carbon surface can be reduced. And thereby, the lifetime of the activated carbon adsorption tower can be extended. Moreover, since hardly decomposable substances such as organic fluorine compounds are adsorbed by the activated carbon adsorption tower, contaminants contained in the treated water can be more effectively removed.

  In order to solve the above problems, the water treatment method of the present invention introduces a bubble generation step for generating micro-nano bubbles or nano bubbles in the treated water and the treated water after the generation of the micro-nano bubbles or nano bubbles into the treatment tank. And a contacting step of bringing the treated water introduced into the treatment tank into contact with a carrier made of polyvinyl alcohol, the carrier having pores, and microorganisms on the carrier. It is characterized by being fixed.

  According to the said structure, after the micro nano bubble or nano bubble generate | occur | produces in treated water, the said treated water contacts the said support | carrier. At this time, since the pores are provided in the carrier, the surface area of the carrier can be increased. In other words, a scaffold for growing microorganisms can be increased. The carrier is made of polyvinyl alcohol. Since polyvinyl alcohol has good adhesion and adhesion to microorganisms, according to the above configuration, many microorganisms can be immobilized on the surface of the carrier. That is, according to the said structure, more microorganisms can be more reliably fix | immobilized on the support | carrier surface.

  Moreover, according to the said structure, micro nano bubble or nano bubble contains in treated water. Since the bubbles are small in size, they can easily diffuse into the pores. Micro-nano bubbles and nano-bubbles have a property of being easily adsorbed on a carrier made of polyvinyl alcohol. Therefore, according to the said structure, sufficient gas (for example, oxygen etc.) can be supplied with respect to microorganisms with the bubble adsorb | sucked on the support | carrier surface. Therefore, according to the said structure, the proliferation activity and substance decomposition activity of microorganisms can be raised.

  Moreover, as described above, micro-nano bubbles and nano-bubbles have a property of being easily adsorbed on a carrier made of polyvinyl alcohol. Since the specific gravity of polyvinyl alcohol is about 1.025, the specific gravity of the complex of the carrier and the gas becomes close to 1 when the gas adheres to the carrier. That is, the complex exhibits a property that it is difficult to settle at the bottom of the treatment tank. Therefore, according to the above configuration, since the carrier can be easily stirred, gas can be supplied satisfactorily to the microorganisms immobilized on the surface of the carrier and introduced into the treatment tank. When the treated water is made anaerobic, the microbial growth environment can be easily changed to anaerobic conditions.

  Moreover, according to the said structure, a micro nano bubble or a nano bubble generate | occur | produces in process water. Since micro-nano bubbles and nano bubbles can generate free radicals, according to the above configuration, contaminants contained in the treated water can be oxidatively decomposed by the free radicals.

  From the above, according to the above configuration, contaminants contained in the treated water can be effectively removed.

  In the water treatment method of the present invention, the pore diameter is preferably about 20 μm.

  According to the said structure, the hole diameter of the pore provided in the said support | carrier is small. Therefore, according to the above configuration, since the surface area of the carrier can be increased, the amount of microorganisms that can be immobilized on the surface of the carrier can be increased. As a result, according to the above configuration, contaminants contained in the treated water can be effectively removed.

  The water treatment method of the present invention includes a gas discharge step for discharging gas to the treated water introduced into the treatment tank, and a stirring step for stirring the treated water introduced into the treatment tank. It is preferable to have.

  According to the said structure, the support | carrier in the said processing tank can be easily stirred with the water flow produced by the gas discharge process and the stirring process. That is, when the inside of the treatment tank is set to an aerobic condition, a gas (for example, oxygen) can be supplied to the treatment water by the gas discharge step, and the carrier in the treatment tank is Can be stirred. On the other hand, when the inside of the treatment tank is subjected to anaerobic conditions, the carrier in the treatment tank can be stirred by the stirring step. In addition, what is necessary is just to stop the supply to the said processing tank, for example, when setting the inside of the said processing tank to anaerobic conditions. Since oxygen in the treatment tank is consumed by microorganisms, as a result, the treatment tank gradually changes to anaerobic conditions. Moreover, what is necessary is just to use both processes of the said gas discharge process and the said stirring process, when making the inside of the said processing tank into aerobic conditions and maximizing the flow state in the said processing tank. Thereby, for example, even if the inflow concentration of factory wastewater or the like into the treatment tank increases rapidly, the factory wastewater can be efficiently treated by rapidly improving the treatment efficiency in the treatment tank. As described above, according to the above configuration, the carrier in the treatment tank can be easily stirred regardless of whether the treatment water in the treatment tank is in an aerobic condition or an anaerobic condition. Moreover, the carrier is made of polyvinyl alcohol. It is possible to immobilize and grow both aerobic and anaerobic microorganisms on the surface of polyvinyl alcohol. Therefore, according to the said structure, while being able to draw out the substance degradation capability of the microorganisms fix | immobilized on the surface of the said carrier to the maximum, the contaminant contained in treated water can be removed effectively.

  In the water treatment method of the present invention, it is preferable that the gas discharge step alternately repeats a discharge step of discharging gas to the treated water and a non-discharge step of not discharging gas to the treated water.

  According to the above configuration, the carrier is formed of polyvinyl alcohol, and the carrier is provided with pores. Both aerobic microorganisms and anaerobic microorganisms can be immobilized on the surface of polyvinyl alcohol, and both the immobilized microorganisms can grow on the carrier. Moreover, according to the said structure, since the bubble of small size is used, the said bubble can be spread | diffused easily in the said pore. In the prior art, even if pores are provided in the carrier, anaerobic microorganisms mainly propagate in the pores. On the other hand, in the present invention, aerobic microorganisms can be propagated into the pores. Therefore, according to the said structure, since the quantity of the microorganisms fix | immobilized on the surface of a support | carrier can be increased, the contaminant contained in treated water can be processed more effectively. In addition, since both aerobic microorganisms and anaerobic microorganisms can be propagated at a high concentration in the treatment tank, various kinds of contaminants can be treated. Moreover, since anaerobic microorganisms can be propagated, microbial sludge digestion occurs, thereby reducing the generation of excess sludge.

  In the water treatment method of the present invention, it is preferable to have, after the contacting step, a filtration step of applying the treated water to a rapid filtration tower or an adsorption step of applying the treated water to an activated carbon adsorption tower.

  According to the said structure, the contaminant contained in process water can be removed more reliably. For example, the above configuration preferably includes an adsorption step after the filtration step. In this case, before the treated water is introduced into the activated carbon adsorption tower, suspended substances in the treated water can be removed in advance. That is, suspended solids adhering to the activated carbon surface can be reduced. And thereby, the lifetime of the activated carbon adsorption tower can be extended. Moreover, since hardly decomposable substances such as organic fluorine compounds are adsorbed by the activated carbon adsorption tower, contaminants contained in the treated water can be more effectively removed.

  In the water treatment method of the present invention, the treated water is preferably organic fluorine compound-containing waste water, industrial water, factory waste water, factory waste water treated water, or clean water.

  According to the above configuration, contaminants contained in the treated water can be effectively removed.

  As described above, the water treatment apparatus of the present invention is a bubble generating means for generating micro-nano bubbles or nano bubbles in treated water, a treatment tank for introducing the treated water after the generation of the micro-nano bubbles or nano bubbles, and the treatment A support made of polyvinyl alcohol provided so as to be in contact with the treated water introduced into the tank, the support having pores, and microorganisms immobilized on the support. .

  In addition, as described above, the water treatment method of the present invention introduces the bubble generation step for generating micro-nano bubbles or nano bubbles in the treated water and the treated water after the generation of the micro-nano bubbles or nano bubbles into the treatment tank. An introduction step, and a contact step of bringing the treated water introduced into the treatment tank into contact with a carrier made of polyvinyl alcohol. The carrier has pores, and microorganisms are immobilized on the carrier. It is a method that has been realized.

  Therefore, since the carrier is excellent in fluidity in the treatment tank, the carrier can be stirred with a small stirring force. In addition, since the carrier has high water content and excellent oxygen permeability, and since the carrier is provided with pores, many microorganisms can be immobilized on the carrier. Moreover, since the treated water introduced into the treatment tank contains small-sized bubbles such as micro-nano bubbles or nano-bubbles, the bubbles can easily diffuse into the pores. As a result, the amount of the microorganisms immobilized on the surface of the carrier can be increased, in other words, the microorganisms immobilized on the carrier can be actively grown and the substance of the microorganisms can be activated. There is an effect that the decomposition ability can be maximized. In addition, the present invention has an effect that the amount of excess sludge generated in a treatment process such as waste water can be reduced. In addition, since the carrier is insolubilized by a chemically cross-linked structure, the carrier itself is less susceptible to biodegradation. And since this invention has the outstanding effect as mentioned above, processing capacity, such as waste water, can be raised to 2 to 3 times the processing capacity of the conventional activated sludge method.

[Embodiment 1]
In FIG. 1, the water treatment apparatus of this Embodiment is shown.

  The water treatment apparatus according to the present embodiment includes a first tank 1, a nanobubble generating unit 42 (bubble generating means), and a second tank 15 (processing tank). Each configuration will be described below.

  In the water treatment apparatus of the present embodiment, factory waste water 44 as treated water is introduced into the first tank 1 through the inflow pipe 23.

  In the water treatment apparatus of the present embodiment, factory wastewater is used as the treated water, but is not limited thereto. As the treated water, for example, factory waste water, organic fluorine compound-containing waste water, industrial water, factory waste water treated water, ground water or tap water (tap water) is preferably used. When factory wastewater is used as the treated water, for example, it is possible to use factory wastewater having a biological oxygen demand of 300 ppm or more as an organic substance and a chemical oxygen demand of 200 ppm or more. Since the water treatment apparatus of this Embodiment has the high removal effect of the contaminant contained in a treated water, it can also process the factory wastewater as mentioned above.

  Next, micro-nano bubbles or nano bubbles are generated by the nano bubble generating unit 42 in the treated water introduced into the first tank 1. Below, the nanobubble generation part 42 is demonstrated.

  The nanobubble generating part 42 includes a gas-liquid mixing circulation pump 2 (overflow pump) having a first gas shearing part 3, a second gas shearing part 4, a third gas shearing part 6, an electric needle valve 9, and the like.

  First, a gas (for example, oxygen or the like) is supplied into the first gas shearing section 3 through the pipe 8, and treated water is supplied into the first gas shearing section 3 through the pipe 7. The gas in the first gas shearing section 3 and the treated water are mixed and sheared by the gas-liquid mixing circulation pump 2, and as a result, microbubbles and micronanobubbles made of the gas are formed.

The gas-liquid mixing circulation pump 2 may be a high-lift pump, and a known pump can be used as appropriate. Specifically, the gas-liquid mixing circulation pump 2 is preferably a pump having a high head having a lift of 40 m or more, in other words, a pump capable of extruding the gas-liquid mixture at a pressure of 4 kg / cm 2 or more. According to the above configuration, a large amount of microbubbles can be produced. Furthermore, the gas-liquid mixing circulation pump 2 is preferably a pump having two poles. There are pumps having 2 poles and pumps having 4 poles. Pumps having 2 poles have more stable torque than pumps having 4 poles. Therefore, a large amount of microbubbles can be produced more stably.

  Although the shape of the 1st gas shear part 3 is not specifically limited, In order to generate | occur | produce a rotational shear flow efficiently in the said 1st gas shear part 3, it is preferable to have a cylindrical flow path. The bubble-containing water passes through the flow path.

  Pressure is applied to the gas and treated water in the first gas shearing section 3 by the gas-liquid mixing circulation pump 2, and as a result, a mixed-phase swirling flow of treated water and gas is generated in the first gas shearing section 3. More specifically, the gas-liquid mixing circulation pump 2 includes blades called impellers, and a multiphase swirl flow is formed by rotating the blades at a high speed. A gas cavity is formed at the center of the first gas shearing section 3 as a result of the multiphase swirling flow swirling at a high speed. Then, by further applying pressure to the gas cavity by the gas-liquid mixing circulation pump 2, the gas cavity becomes a tornado-like elongated shape. As a result, a rotating shear flow swirling at a higher speed can be generated. In addition, since the inside of the said gas cavity part becomes a negative pressure, if the said negative pressure is utilized, it will become possible to supply gas with respect to the said gas cavity part from the outside.

  The mixed phase swirl can be cut and pulverized by rotating the mixed phase swirl at a high speed while allowing gas (for example, oxygen) to be self-supplied to the gas cavity through the pipe 8. The cutting / pulverization is caused by the difference in the swirling speed of the gas-liquid mixture inside and outside the first gas shearing section 3 in the vicinity of the outlet of the first gas shearing section 3.

  The rotational speed of the rotating shear flow is not particularly limited, but is preferably 500 to 600 revolutions / second. The rotational speed of the rotating shear flow can be set by adjusting the rotational speed of the blade (impeller). According to the above configuration, a large amount of microbubbles can be produced by the first gas shearing unit 3.

That is, in the first gas shearing section 3, gas (for example, oxygen) is sucked from the negative pressure forming section by controlling the pressure of the gas-liquid mixture hydrodynamically, and the gas-liquid mixing circulation pump 2 performs the above gas-liquid mixing. A negative pressure part is formed by high-speed fluid motion of the mixture, whereby microbubbles can be generated. In other words, microbubble cloudy water can be produced by effectively self-supplying and dissolving the treated water and gas by the gas-liquid mixing circulation pump 2 and pumping the gas-liquid mixture. And the microbubble produced in the 1st gas shearing part 3 is pumped to the 2nd gas shearing part 4 through a pipe | tube. That is, in a state where pressure is applied to the microbubble cloudy water, the microbubble clouded water is fed into the second gas shearing portion 4. At this time, since the gas-liquid mixing circulation pump 2 is a high-lift pump, if the lift is 40 m or more, the microbubble cloudy water is applied to the second gas shearing part 4 in a state where a pressure of 4 kg / cm 2 or more is applied. Can be sent in.

  The shape of the second gas shearing portion 4 is not particularly limited, but it is preferable that the second gas shearing portion 4 has a cylindrical flow path in order to further reduce the rotational shear flow in the second gas shearing portion 4.

  According to the above configuration, the first gas shearing section 3 is fed into the second gas shearing section 4 by pumping the rotational shear flow formed in the first gas shearing section 3 to the second gas shearing section 4. It is possible to make the rotating shear flow formed in step 1 and the rotational speed of the rotating shear flow higher. As a result, nanobubbles and micronanobubbles can be produced using the microbubbles formed in the first gas shearing section 3, and an ultra-high temperature extreme reaction field can be formed.

In the extreme reaction field, a high temperature and high pressure state is locally produced. In the limit reaction field, free radicals are generated. Free radicals have the property of depriving electrons from other atoms to stabilize, and therefore have the property of exhibiting a strong oxidizing action and the property of generating heat. Therefore, the water treatment apparatus of the present embodiment can oxidize and decompose contaminants contained in the treated water even by an oxidizing action derived from free radicals.
Nanobubbles can exist in water for a long time. Specifically, nanobubbles can remain present in water for more than two months. Therefore, the oxidation action and the microorganism activation action in the subsequent stage can be maintained for a long time.

  The bubble-containing water formed in the second gas shearing part 4 is supplied to the third gas shearing part 6 through the pipe 5. The bubble produced by the second gas shearing part 4 is further sheared by the third gas shearing part 6 and the bubble size is further reduced. In addition, as the 3rd gas shearing part 6, it is possible to use the same structure as the said 2nd gas shearing part 4. FIG. Since the second gas shearing section 4 has already been described, the description of the third gas shearing section 6 is omitted here.

  In addition, what is marketed can be used as the nano bubble generation | occurrence | production part 42 in the water treatment apparatus of this Embodiment. Specifically, products manufactured by Kyowa Kikai Co., Ltd. can be used (for example, Bavidas HYK type), but is not limited thereto.

  The third gas shearing unit 6 discharges micro-nano bubbles or treated water containing nano-bubbles into the first tank 1 as a water flow 26.

  In the water treatment apparatus of the present embodiment, the opening / closing operation of the electric needle valve 9 and the operation of the gas-liquid mixing circulation pump are controlled by the sequencer 14 via the signal line 11. Thereby, the amount of nanobubbles and micro-nanobubbles discharged from the third gas shearing section 6 can be adjusted.

  The treated water containing the bubbles discharged into the first tank 1 is introduced into the second tank 15 (treatment tank) via the pipe 10. The treated water introduced into the second tank 15 can come into contact with the carrier 16 in the second tank 15. The carrier 16 is provided with pores, and many microorganisms are immobilized on the surface of the carrier 16. And various contaminants (for example, organic substance etc.) contained in the said treated water are decomposed | disassembled by the said microorganisms. Below, the decomposition process using the microorganisms performed in the said 2nd tank 15 is demonstrated.

  As described above, the second tank 15 functions as a treatment tank for decomposing the contaminants contained in the treated water mainly by microorganisms. In addition, since nanobubbles or micro-nanobubbles exist in the treated water, free radicals are generated by the bubbles in the second tank 15, and the oxidative decomposition of contaminants by the free radicals continues.

  It does not specifically limit as said 2nd tank 15, A well-known tank can be used suitably. Although it does not specifically limit as a shape of the said 2nd tank 15, For example, it is preferable that the shape of the accommodating part of the treated water in the said 2nd tank 15 is a cube or a rectangular parallelepiped. At this time, the shape of the cross section of the second tank 15 (the shape of the cross section of the housing portion) is a first side having a length of a (m) and a length of b (m). In addition to being defined by a quadrilateral having two sides, the depth in the vertical direction of the processing tank (the vertical depth of the container) is defined by c (m), and c: a and c: b It is more preferable that the ratios indicated by are both 1: 1.0 to 1.3.

  The second tank 15 is preferably provided with a lid. The said lid | cover should just be what can make the inside of the said 2nd tank 15 into a sealed structure, and a specific structure is not specifically limited. The lid is preferably provided with a tube 46 used for venting air.

  According to the said structure, since the treated water in the said 2nd tank 15 can be isolated from an external environment, the inside of the 2nd tank 15 can be set strictly to an aerobic condition or an anaerobic condition. For example, when the inside of the second tank 15 is set to an anaerobic condition, since the treated water in the second tank 15 can be isolated from the outside air, the anaerobic condition can be controlled more strictly. Further, when the inside of the second tank 15 is set to an aerobic condition, excess gas (for example, oxygen) can be removed by the pipe 46, and therefore the aerobic condition is controlled more strictly. be able to.

  The second tank 15 is preferably provided with an oxidation-reduction potentiometer 47 for measuring the oxidation-reduction potential of the treated water in the second tank 15. The oxidation-reduction potentiometer 47 is not particularly limited, and a known oxidation-reduction potentiometer can be used as appropriate. The function of the oxidation-reduction potentiometer 47 will be described later.

  In the second tank 15, in other words, in the housing portion, a carrier 16 made of polyvinyl alcohol is provided, and the carrier 16 is provided with pores.

  The specific structure of the carrier 16 is not particularly limited as long as it is formed of polyvinyl alcohol and has pores formed in the carrier 16. For example, it is preferable to use a poval resin as the carrier 16. More specifically, it is preferable to use Kuraray (registered trademark) manufactured by Kuraray Co., Ltd. as the carrier 16. For example, the claragale is a particle having a diameter of about 4 mm and a specific gravity of 1.025, and can immobilize about 1 billion microorganisms per particle. Therefore, according to the said structure, the quantity of the microorganisms fix | immobilized on the surface of the support | carrier 16 can be increased.

  It does not specifically limit as a hole diameter of the said pore, It can set suitably as needed. For example, the pore diameter is preferably 19 μm to 21 μm. More preferably, it is about 20 μm. According to the said structure, while being able to increase the surface area of the said support | carrier 16, a micro nano bubble and a nano bubble can be easily diffused in the said pore. In addition, nanobubbles and micronanobubbles are likely to adhere to the surface of polyvinyl alcohol. As a result, the microorganisms immobilized on the surface of the carrier 16 can be more activated.

  Microorganisms are immobilized on the surface of the carrier 16. The microorganism is not particularly limited, but is preferably an aerobic microorganism or an anaerobic microorganism. More specifically, the microorganism is preferably a minute earthworm, protozoan, or bacterium, but is not limited thereto.

  The shape of the carrier 16 is not particularly limited, and may be a shape suitable for the purpose. For example, the shape of the carrier 16 is preferably particulate. According to the said structure, since the support | carrier 16 is easy to flow through the 2nd tank 15, the said support | carrier 16 can be stirred with a weak force. Further, according to the above configuration, since the surface area of the carrier 16 can be increased, more microorganisms can be immobilized on the surface of the carrier 16.

  In addition, the carrier 16 may be provided to flow in the second tank 15. In other words, the carrier 16 can be provided so as to float in the treated water in the second tank 15 without being fixed to the surface of the second tank 15. A part of the carrier 16 may be provided so as to be able to flow in the second tank 15, and the rest of the carrier 16 may be fixed and provided in the second tank 15. When a part of the carrier 16 is flowable and the rest is immobilized, the ratio of the amount of the carrier 16 to be immobilized with respect to the total amount of the carrier 16 is not particularly limited and can be set as appropriate. At this time, since the amount of the anaerobic microorganisms can be increased as the amount of the carrier 16 to be immobilized increases, the amount ratio of the desired aerobic microorganisms to the anaerobic microorganisms is taken into consideration with respect to the amount of the whole carrier 16. What is necessary is just to determine the ratio of the quantity of the support | carrier 16 fixed.

  It is preferable that a diffuser pipe 19 ((first aeration means)) for discharging gas into the second tank 15 is provided in the second tank 15. By discharging gas (bubbles 18) to the treated water in the second tank 15 through the air diffuser 19, the inside of the second tank 15 can be set to an aerobic condition. Further, since the gas rises in the treated water toward the water surface, an ascending water flow can be generated. And thereby, the treated water and the support | carrier 16 in the 2nd tank 15 can be stirred.

  A gas is supplied to the diffuser pipe 19 from the blower 12 via the pipe 13, and the gas is discharged from the diffuser pipe 19 into the second tank 15. Specific configurations of the air diffuser 19 and the blower 12 are not particularly limited, and known configurations can be used as appropriate. Further, the gas supplied from the blower 12 to the diffuser pipe 19 is not particularly limited. For example, air or oxygen can be used, but is not limited thereto.

  The second tank 15 is preferably provided with an underwater stirrer 20 (stirring means) for generating a water flow in order to stir the treated water and the carrier 16 in the second tank 15. It does not specifically limit as a specific structure of the underwater stirrer 20, A well-known structure can be used suitably. For example, the underwater stirrer 20 is preferably one that does not discharge gas to the treated water. According to the said structure, process water and the support | carrier 16 can be stirred, setting the inside of the 2nd tank 15 to anaerobic conditions. More specifically, the agitator 20 is preferably an underwater aerator, but is not limited thereto.

  It is preferable that the aeration pipe 19 and the underwater agitator 20 are provided in a water flow generation pipe 17 (draft) provided in the second tank 15.

  The position where the water flow generation pipe 17 is provided is not particularly limited, but is preferably the center of the second tank 15. According to the said structure, the treated water and the support | carrier 16 in the 2nd tank 15 can be stirred uniformly.

  Although it does not specifically limit as a shape of the said water flow generation pipe | tube 17, For example, it is preferable that it is a cylindrical shape. At this time, the two openings of the water flow generation pipe 17 are respectively disposed so as to face the bottom surface of the second tank 15 or the surface of the treated water introduced into the second tank 15. Is preferred.

  Further, it is preferable that a support plate 21 is provided inside the water flow generation pipe 17 in order to fix and support the underwater agitator 20 below the underwater agitator 20. Further, the support plate 21 is preferably provided with a plurality of openings having a size through which the carrier 16 can pass. For example, when the shape of the carrier 16 is a substantially spherical shape having a diameter of 4 mm, the diameter of the opening is preferably 6 mm. According to the said structure, since the support | carrier 16 can flow freely through the said opening, the treated water and the support | carrier 16 in the 2nd tank 15 can be made to flow effectively.

  The arrangement of the underwater stirrer 20 and the diffuser pipe 19 in the second tank 15 is not particularly limited, but both configurations are preferably provided inside the water flow generation pipe 17. According to the said structure, the direction of the water flow in the 2nd tank 15 can be controlled easily.

  At this time, it is preferable that the position of the underwater stirrer 20 in the water flow generation pipe 17 is closer to the bottom surface side of the second tank 15 than the air diffusion pipe 19. According to the above configuration, it is possible to prevent the water flow formed by the air diffuser 19 from being blocked by the underwater agitator 20. At this time, the direction of the water flow formed by the underwater agitator 20 may be upward (direction toward the water surface of the treated water) or downward (direction toward the bottom surface of the second tank 15). When the direction of the water flow formed by the underwater stirrer 20 is upward, the treated water and the carrier 16 existing on the upper side in the second tank 15 can be more effectively stirred. Moreover, a stronger water flow can be generated by using the air diffuser 19 and the underwater agitator 20 at the same time. On the other hand, when the direction of the water flow formed by the underwater agitator 20 is downward, the treated water and the carrier 16 existing on the upper side in the second tank 15 can be more effectively stirred.

  The gas-liquid mixing circulation pump 2, the electric needle valve 9, the blower 12, the air diffuser 19, the underwater stirrer 20, and the oxidation-reduction potentiometer 47 are connected to the sequencer 14 via the signal line 11. The oxidation-reduction potential meter 47 measures the oxidation-reduction potential of the treated water in the second tank 15, and the measured value is sent to the oxidation-reduction potential controller 48. The redox potential controller 48 determines whether the treated water in the second tank 15 is in an aerobic condition or an anaerobic condition based on the measured value. Note that the oxidation-reduction potential regulator 48 can store a desired state (anaerobic or aerobic) of the treated water in the second tank 15 in advance. The desired state of the treated water may change over time. For example, an aerobic condition and an anaerobic condition may be repeated. Various types of information are transmitted from the redox controller 48 to the sequencer 14.

  The sequencer 14 can control the operations of the gas-liquid mixing circulation pump 2, the electric needle valve 9, the blower 12, the diffuser pipe 19 and the underwater agitator 20 based on the determination of the oxidation-reduction potential controller 48. Thereby, since the state in the second tank 15 can be set to an aerobic condition or an anaerobic condition, the type of microorganisms (aerobic microorganisms or anaerobic microorganisms) immobilized on the surface of the carrier 16 can be determined. Can be controlled. That is, in the water treatment apparatus of the present embodiment, both aerobic microorganisms and anaerobic microorganisms can be propagated simultaneously, and contaminants can be treated (decomposed and removed) by both microorganisms. That is, in the prior art, both aerobic microorganisms and anaerobic microorganisms could not be sufficiently propagated in one tank, but in the water treatment apparatus of the present embodiment, aerobic microorganisms are used in one tank. And both anaerobic microorganisms can be sufficiently propagated.

  When the value of the oxidation-reduction potentiometer 47 is positive, the inside of the second tank 15 is an aerobic condition, and conversely, when the value is negative, the inside of the second tank 15 is an anaerobic condition. . And in the water treatment apparatus of this Embodiment, by controlling the internal condition of the 2nd tank 15 appropriately, the environment where both an aerobic microorganism and an anaerobic microorganism can coexist appropriately is produced.

  The control method of the operation of the gas-liquid mixing circulation pump 2, the electric needle valve 9, the blower 12, the air diffuser 19 and the underwater agitator 20 by the sequencer 14 is not particularly limited. The control method can be, for example, a method of appropriately controlling the operation time of each component and / or the combination of components to be operated. For example, when the inside of the second tank 15 is set to an aerobic condition, the blower 12 and the air diffuser 19 may be driven. On the other hand, when the inside of the second tank 15 is set to anaerobic conditions, the blower 12 and the air diffuser 19 are stopped and the underwater agitator 20 is driven. In addition, the inside of the second tank 15 can be continuously changed between an aerobic condition and an anaerobic condition.

  The treated water treated in the second tank 15 as described above is discharged out of the second tank 15 through the pipe 22. The discharged treated water 45 can be used for a desired application as a treated liquid. Further, it is possible to further purify the treated water 45. This will be described in another embodiment.

[Embodiment 2]
Another embodiment of the present invention will be described with reference to FIG. Configurations other than those described in the present embodiment are the same as those in the first embodiment. For convenience of explanation, members having the same functions as those shown in the drawings of Embodiment 1 are given the same reference numerals and explanation thereof is omitted.

  In the water treatment apparatus of the present embodiment, the nanobubble generating unit 42 in the first embodiment is replaced with a micro / nanobubble generating unit 43 (bubble generating means).

  Since the water treatment apparatus of the present embodiment uses the micro / nano bubble generating unit 43, the amount of nano bubbles in the first tank 1 is small, and most of them are micro / nano bubbles. Therefore, the water treatment apparatus of the present embodiment has less oxidizing action due to free radicals than the water treatment apparatus of the first embodiment. However, since the micro-nano bubbles can activate the microorganisms immobilized on the surface of the carrier 16, the water treatment apparatus of the present embodiment is more effective than the conventional water treatment method and water treatment apparatus. High ability.

  The micro-nano bubble generating unit 43 is not particularly limited as long as it can generate micro-nano bubbles. Hereinafter, an example of the configuration of the micro / nano bubble generating unit 43 will be described.

  For example, the micro / nano bubble generating unit 43 can be configured by the gas shearing unit 25, the tube 5, the circulation pump 24, the tube 7 for taking in water, the tube 8 for taking in air, and the electric needle valve 9. Water whose pressure has been increased by the circulation pump 24 is introduced into the gas shearing portion 25 together with air to generate micro-nano bubbles.

  As the micro / nano bubble generation unit 43, for example, an M2-LM type manufactured by Nano Planet Research Laboratories can be used, but is not limited thereto.

[Embodiment 3]
Another embodiment of the present invention will be described with reference to FIG. Configurations other than those described in the present embodiment are the same as those in the first embodiment. For convenience of explanation, members having the same functions as those shown in the drawings of Embodiment 1 and the like are denoted by the same reference numerals and description thereof is omitted.

  In the water treatment apparatus of the present embodiment, the micro-nano bubble generation unit 43 described in the second embodiment is provided in addition to the nano bubble generation unit 42 described in the first embodiment.

  In the water treatment apparatus of the present embodiment, a large amount of micro / nano bubbles can be generated together with a large amount of nano bubbles. Therefore, the water treatment apparatus of this embodiment has a higher treatment capacity than the water treatment apparatus described in Embodiment 1 or Embodiment 2.

  In addition, since the nano bubble generation part 42 and the micro bubble generation part 43 were already demonstrated, the description is abbreviate | omitted here.

[Embodiment 4]
Another embodiment of the present invention will be described with reference to FIG. Configurations other than those described in the present embodiment are the same as those in the first embodiment. For convenience of explanation, members having the same functions as those shown in the drawings of Embodiment 1 and the like are denoted by the same reference numerals and description thereof is omitted.

  In the water treatment apparatus according to the present embodiment, in addition to the nanobubble generator 42 described in the first embodiment, an underwater pump type micro-nanobubble generator 27 is provided.

  Since the water treatment apparatus of the present embodiment includes the nanobubble generation unit 42 and the submerged pump type micro nanobubble generation unit 27, a large amount of micronanobubbles can be generated together with a large amount of nanobubbles. Therefore, the water treatment apparatus of this embodiment has a higher treatment capacity than the water treatment apparatus described in Embodiment 1 or Embodiment 2.

  The submersible pump type micro / nano bubble generator 27 is connected to a small blower 28 through a tube for air. Air is preferably supplied from the small blower 28 to the submersible pump type micro / nano bubble generating unit 27 at, for example, 1 to 5 liters / minute. The micro-nano bubbles can be generated by rotating the impeller of the submersible pump type micro-nano bubble generator 27 at high speed and shearing the mixture of air and treated water. In addition, the small blower 28, the electric needle valve, and the submersible pump type micro / nano bubble generation unit 27 can be controlled by the sequencer 14 based on a preinstalled program.

  The specific configuration of the submersible pump type micro / nano bubble generating unit 27 is not particularly limited, and a known configuration can be used as appropriate. For example, a micro bubbler MB-150 manufactured by Nomura Electronics Co., Ltd. can be used as the submersible pump type micro / nano bubble generating unit 27, but is not limited thereto.

[Embodiment 5]
Another embodiment of the present invention will be described with reference to FIG. Configurations other than those described in the present embodiment are the same as those in the first embodiment. For convenience of explanation, members having the same functions as those shown in the drawings of Embodiment 1 and the like are denoted by the same reference numerals and description thereof is omitted.

  In the water treatment apparatus of the present embodiment, the second tank 15 in the first embodiment is a deeper tank and the bottom is in a mortar shape. In the water treatment apparatus of the present embodiment, the air diffuser 32 (second air diffuser) and the air diffuser 33 (first) are disposed on both sides of the water flow generating tube 17 on the bottom (on the bottom surface) of the second tank 15. 2 aeration means) is provided.

  The gas discharged from the diffuser tube 32 and the diffuser tube 33 is air discharged from the blower 12. That is, the air discharged from the blower 12 is divided into three by the electric valve 29, the electric valve 30, and the electric valve 31, and each air is discharged from the air diffuser 19, the air diffuser 32, or the air diffuser 33. Yes.

  In the water treatment apparatus of the present embodiment, the bottom of the second tank 15 has a mortar-shaped deep tank structure having a left inclined wall 34 and a right inclined wall 35, and the diffuser pipe 19, the diffuser pipe 32, and the diffuser pipe 33 are provided. Since it is provided, the flow state of the carrier 16 can be improved.

  In the water treatment apparatus of the present embodiment, the opening / closing operations of the electric valve 29, the electric valve 30, and the electric valve 31 can be preset by the sequencer 14 or changed based on various operation data. Moreover, judging from the water quality of the treated water 45, the opening / closing operation, the opening time, and the closing time of the electric valve 29, the electric valve 30, and the electric valve 31 can be adjusted to improve the processing efficiency. Is possible.

  Depending on the type of factory wastewater 44, it is possible to always perform the treatment under aerobic conditions. At this time, the better the processing state of the treated water in the second tank 15 and the carrier 16, the better the treatment efficiency.

[Embodiment 6]
Another embodiment of the present invention will be described with reference to FIG. Configurations other than those described in the present embodiment are the same as those in the first embodiment. For convenience of explanation, members having the same functions as those shown in the drawings of Embodiment 1 and the like are denoted by the same reference numerals and description thereof is omitted.

  In the water treatment apparatus of the present embodiment, the nanobubble generator 42 in the fifth embodiment is replaced with a micro / nanobubble generator 43.

  Since the water treatment apparatus of the present embodiment includes the micro / nano bubble generating unit 43, a large amount of micro / nano bubbles are generated in the first tank 1, while the amount of generated nano bubbles is small. Therefore, the water treatment apparatus of the present embodiment has less oxidizing action due to free radicals than the water treatment apparatus of the fifth embodiment. However, since the micro-nano bubbles can activate the microorganisms immobilized on the surface of the carrier 16, the water treatment apparatus of the present embodiment is more effective than the conventional water treatment method and water treatment apparatus. High ability.

  In addition, since it already demonstrated regarding the micro nano bubble generation | occurrence | production part 43, the description is abbreviate | omitted here.

[Embodiment 7]
Another embodiment of the present invention will be described with reference to FIG. Configurations other than those described in the present embodiment are the same as those in the first embodiment. For convenience of explanation, members having the same functions as those shown in the drawings of Embodiment 1 and the like are denoted by the same reference numerals and description thereof is omitted.

  In the water treatment apparatus of the present embodiment, the second tank 15 in the first embodiment is a deeper tank and the bottom is in a mortar shape. In the water treatment apparatus of the present embodiment, a left inclined wall 34 and a right inclined wall 35 are provided at the bottom of the second tank 15. Further, the water treatment apparatus of the present embodiment is provided with an inflow pipe 36 connected to the first tank 1 through the pipe 10 in the second tank 15. The installation position of the inflow pipe 36 is not particularly limited, but is preferably provided on the bottom surface of the second tank 15.

  Since the water treatment apparatus of the present embodiment has the above-described configuration, it can be treated well under anaerobic conditions as compared with the water treatment apparatuses described in Embodiments 1 to 6. it can.

  For example, if the second tank 15 is a deep tank and has a large capacity, a large amount of microorganisms are immobilized on the carrier 16 and the operation time of the blower 12 is reduced as much as possible, the inside of the second tank 15 is brought into an anaerobic condition. Can be set. At this time, if the amount of air used in the nanobubble generator 42 is set to 0.7 liter / min or less, for example, anaerobic conditions can be realized more easily.

  Moreover, since the inflow pipe 36 connected with the 1st tank 1 is installed in the bottom part of the 2nd tank 15, by discharging a treated water from the said inflow pipe 36, in the 2nd tank 15, a gentle rise It becomes possible to generate a water flow, whereby the carrier 16 and treated water can be brought into gentle contact.

  The wastewater that needs to be treated under anaerobic conditions in the factory wastewater 44 is wastewater containing a large amount of nitrate nitrogen. If organic matter such as alcohol as a hydrogen donor is present in the wastewater, nitric acid is used. Nitrogen can be easily reduced and nitrate nitrogen can be released into the air as nitrogen gas.

[Embodiment 8]
Another embodiment of the present invention will be described with reference to FIG. Configurations other than those described in the present embodiment are the same as those in the first embodiment. For convenience of explanation, members having the same functions as those shown in the drawings of Embodiment 1 and the like are denoted by the same reference numerals and description thereof is omitted.

  In the water treatment apparatus according to the present embodiment, the organic fluorine compound-containing water 39 is used instead of the factory wastewater 44 as compared with the first embodiment. Further, in the water treatment apparatus of the present embodiment, treated water 45 is obtained after treatment by the rapid filtration tower 40 and the activated carbon adsorption tower 41.

  Specific configurations of the rapid filtration tower 40 and the activated carbon adsorption tower 41 are not particularly limited, and known structures can be used as appropriate.

  In the water treatment apparatus of the present embodiment, after treating the treated water with free radicals and microorganisms, the treated water is further treated in the rapid filtration tower 40 and the activated carbon adsorption tower 41, so that it contains an organic fluorine compound that is difficult to treat. The organic fluorine compound can be easily removed from water. Moreover, in the water treatment apparatus of this Embodiment, the lifetime of the activated carbon of the activated carbon adsorption tower 41 can be extended.

[Embodiment 9]
Another embodiment of the present invention will be described with reference to FIG. Configurations other than those described in the present embodiment are the same as those in the first embodiment. For convenience of explanation, members having the same functions as those shown in the drawings of Embodiment 1 and the like are denoted by the same reference numerals and description thereof is omitted.

  Compared with the first embodiment, the water treatment apparatus of the present embodiment has a screen container 51 in order to prevent the carrier 16 from flowing out from an opening that is a connection point between the pipe 22 and the second tank 15. (Filtration filter) is provided. The opening is isolated from the carrier 16 in the second tank 15 by the screen container 51. The water treatment apparatus of the present embodiment is provided with a cleaning air diffuser 52 (third air diffuser) that discharges gas toward the screen container 51.

  The screen container 51 is not particularly limited as long as it can prevent the carrier 16 from flowing into the opening. For example, a filter having a small hole with a diameter of about 3.5 mm can be used as the screen container 51, but is not limited thereto.

  The cleaning air diffuser 52 only needs to be able to discharge bubbles to the screen container 51 to such an extent that the carrier 16 attached to the surface of the screen container 51 is peeled off. be able to.

[Embodiment 10]
Another embodiment of the present invention will be described with reference to FIG. Configurations other than those described in the present embodiment are the same as those in the first embodiment. For convenience of explanation, members having the same functions as those shown in the drawings of Embodiment 1 and the like are denoted by the same reference numerals and description thereof is omitted.

  In the water treatment apparatus of the present embodiment, the underwater stirrer 20 in the first embodiment is replaced with a downward-facing underwater stirrer 53 (stirring means).

  As a specific configuration of the underwater agitator 53, the same configuration as the underwater agitator 20 can be used.

  According to the above configuration, a downward water flow can be generated by the underwater stirrer 53. When the operation of the underwater agitator 53 is stopped, an upward water flow can be generated by the air diffuser 19. That is, according to the water treatment apparatus of the present embodiment, it is possible to generate both upward and downward water flows. And according to the said structure, since the support | carrier 16 and process water which exist in the bottom part of the 2nd tank 15 can be stirred effectively, the activity of an anaerobic microorganism can be raised.

[Embodiment 11]
Another embodiment of the present invention will be described with reference to FIG. Configurations other than those described in the present embodiment are the same as those in the first embodiment. For convenience of explanation, members having the same functions as those shown in the drawings of Embodiment 1 and the like are denoted by the same reference numerals and description thereof is omitted.

  In the water treatment apparatus of the present embodiment, the underwater stirrer 20 in the first embodiment is replaced with a downward-facing underwater stirrer 53 (stirring means). Further, in the water treatment apparatus of the present embodiment, gas is supplied from the blower 12 to the underwater agitator 53 via the pipe 13, and thus, the water flow generated by the underwater agitator 53 is composed of the above gas. Contains a bubble.

  As a specific configuration of the underwater agitator 53, the same configuration as the underwater agitator 20 can be used.

  According to the above configuration, a downward water flow can be generated by the underwater stirrer 53. At this time, since the downward water flow contains bubbles, gas can be supplied also to the bottom of the second tank 15. When the operation of the underwater agitator 53 is stopped, an upward water flow can be generated by the air diffuser 19. That is, according to the water treatment apparatus of the present embodiment, it is possible to generate a water flow containing bubbles that are both upward and downward. And according to the said structure, since the support | carrier 16 and process water which exist in the bottom part of the 2nd tank 15 can be stirred effectively, the activity of an aerobic microorganism can be raised.

[Embodiment 12]
Another embodiment of the present invention will be described with reference to FIG. Configurations other than those described in the present embodiment are the same as those in the first embodiment. For convenience of explanation, members having the same functions as those shown in the drawings of Embodiment 1 and the like are denoted by the same reference numerals and description thereof is omitted.

  In the water treatment apparatus of the present embodiment, the underwater stirrer 20 in the first embodiment is replaced with a downward-looking underwater stirrer 53 (stirring means). Further, in the water treatment apparatus of the present embodiment, a convex portion 54 that protrudes toward the center in the cross section of the second tank 15 is provided on the inner surface of the second tank 15.

  The convex portion 54 is not particularly limited as long as it can divide the inside of the second tank 15 into an upper tank and a lower tank. For example, the convex portion 54 preferably has an annular structure along the inner surface of the second tank 15. At this time, the protruding distance toward the center of the cross section of the second tank 15 in the convex portion 54 is not particularly limited. Moreover, it is preferable that the shape of the vertical cross section of the said convex part 54 is a triangle. The most preferable shape of the convex portion 54 is that the convex portion 54 has an annular structure along the inner surface of the second tank 15, and the vertical cross-sectional shape of the convex portion 54 is an equilateral triangle.

  According to the above configuration, a downward water flow can be generated by the underwater stirrer 53. When the operation of the underwater agitator 53 is stopped, an upward water flow can be generated by the air diffuser 19. That is, according to the water treatment apparatus of the present embodiment, it is possible to generate both upward and downward water flows. And according to the said structure, since the support | carrier 16 and process water which exist in the bottom part of the 2nd tank 15 can be stirred effectively, the activity of an anaerobic microorganism can be raised.

  Moreover, according to the said structure, since the convex part 54 is provided on the inner surface of the 2nd tank 15, the flow of the treated water in the 2nd tank 15 can be controlled by the said convex part 5. FIG. For example, even if the carrier 16 hits the bottom surface of the second tank 15 by the water flow discharged from the underwater stirrer 53 and then rebounds and rises in the second tank 15, the direction of the flow is changed by the convex portion 54. As a result, the carrier 16 can be prevented from flowing out of the opening. Moreover, according to the said structure, since the inside of the 2nd tank 15 can be divided into two area | regions with the convex part 54 as a boundary, each area | region can be set to an aerobic condition or an anaerobic condition, Thus, the treated water can be treated simultaneously under both conditions.

[Example 1]
Based on FIG. 1, the water treatment apparatus was produced. In the water treatment apparatus, the capacity of the first tank 1 was 0.1 m 3 and the capacity of the second tank 15 was 5 m 3 . Further, in the second tank 15, about 1 m 3 (about 20% of the capacity of the second tank 15) of poval resin (Kuraray (registered trademark) manufactured by Kuraray Co., Ltd.) was added. Moreover, as the nano bubble generating part 42 which is a nano bubble generator, Bavitus HYK-32 manufactured by Kyowa Kikai Co., Ltd. was used. In addition, the power of the gas-liquid mixing circulation pump 2 with which the said Bavitas HYK-32 was provided was 3.7 kw.

Moreover, as the underwater agitator 20, an underwater aerator SU15 manufactured by Shin Meiwa Kogyo Co., Ltd. was used. The underwater aerator SU15 is an underwater aerator with a discharge water amount of 9 m 3 / min, an output of 1.5 kW, and a body weight of 175 kg.

  Waste water containing organic substances (factory waste water 44) was introduced into the water treatment apparatus, and the waste water was treated for one month. In addition, as said waste water, the organic matter containing waste water discharged | emitted from a semiconductor factory was used, and the TOC value (total organic carbon) before the process of the said organic matter containing waste water was 87 ppm.

  On the other hand, the TOC value of the organic matter-containing wastewater (treated water 45) after the treatment for one month was 16 ppm.

[Example 2]
Based on FIG. 8, a water treatment apparatus was produced. In the water treatment apparatus, the capacity of the first tank 1 was 0.1 m 3 and the capacity of the second tank 15 was 5 m 3 . Further, in the second tank 15, about 1 m 3 (about 20% of the capacity of the second tank 15) of poval resin (Kuraray (registered trademark) manufactured by Kuraray Co., Ltd.) was added. Moreover, as the nano bubble generating part 42 which is a nano bubble generator, Bavitus HYK-32 manufactured by Kyowa Kikai Co., Ltd. was used. In addition, the power of the gas-liquid mixing circulation pump 2 with which the said Bavitas HYK-32 was provided was 3.7 kw. Also, the capacity of the rapid filtration tower 40 was set to 0.05 m 3, the capacity of the activated carbon adsorption tower 41 was 0.2 m 3.

Moreover, as the underwater agitator 20, an underwater aerator SU15 manufactured by Shin Meiwa Kogyo Co., Ltd. was used. The underwater aerator SU15 is an underwater aerator with a discharge water amount of 9 m 3 / min, an output of 1.5 kW, and a body weight of 175 kg.

  An organic fluorine compound-containing water containing PFOS (perfluorooctane sulfonic acid) (organic fluorine compound-containing water 39) was introduced into the water treatment apparatus, and the organic fluorine compound-containing water was treated for 90 days or more. In addition, the PFOS density | concentration of the said organic fluorine compound containing water before a process was 160 ng / L. The treated organic fluorine compound-containing water was treated with the rapid filtration tower 40 and the activated carbon adsorption tower 41, and then the PFOS concentration of the organic fluorine compound-containing water was measured. The PFOS concentration was 3.2 ng / L. there were. In addition, the measurement of the density | concentration of PFOS followed the liquid chromatograph-tandem type | mold mass spectrometry (LC-MS / MS).

  From the above results, the removal rate of PFOS in this example was 98%.

[Comparative Example 1]
Based on FIG. 1, the water treatment apparatus was produced. In the water treatment apparatus, the capacity of the first tank 1 was 0.1 m 3 and the capacity of the second tank 15 was 5 m 3 . Further, no poval resin was added to the second tank 15. In addition, as the nanobubble generating unit 42, Bavitus HYK-32 manufactured by Kyowa Kikai Co., Ltd. was used. In addition, the power of the gas-liquid mixing circulation pump 2 with which the said Bavitas HYK-32 was provided was 3.7 kw.

Moreover, as the underwater agitator 20, an underwater aerator SU15 manufactured by Shin Meiwa Kogyo Co., Ltd. was used. The underwater aerator SU15 is an underwater aerator with a discharge water amount of 9 m 3 / min, an output of 1.5 kW, and a body weight of 175 kg.

  Waste water containing organic substances (factory waste water 44) was introduced into the water treatment apparatus, and the waste water was treated for one month. In addition, as said waste water, the organic matter containing waste water discharged | emitted from a semiconductor factory was used, and the TOC value (total organic carbon) before the process of the said organic matter containing waste water was 92 ppm.

  On the other hand, the TOC value of the organic matter-containing wastewater (treated water 45) after the treatment for one month was 32 ppm.

[Comparative Example 2]
Basically, a water treatment apparatus was produced based on FIG. In the water treatment apparatus, the capacity of the first tank 1 was 0.1 m 3 and the capacity of the second tank 15 was 5 m 3 . Further, in the second tank 15, about 1 m 3 (about 20% of the capacity of the second tank 15) of poval resin (Kuraray (registered trademark) manufactured by Kuraray Co., Ltd.) was added. Moreover, in the said comparative example 2, instead of the nano bubble generation | occurrence | production part 42, the big bubble was generated using the well-known blower and the diffuser tube, and the treated water in the 1st tank 1 was stirred with the said bubble.

Moreover, as the underwater agitator 20, an underwater aerator SU15 manufactured by Shin Meiwa Kogyo Co., Ltd. was used. The underwater aerator SU15 is an underwater aerator with a discharge water amount of 9 m 3 / min, an output of 1.5 kW, and a body weight of 175 kg.

  Waste water containing organic substances (factory waste water 44) was introduced into the water treatment apparatus, and the waste water was treated for one month. In addition, as said waste water, the organic matter containing waste water discharged | emitted from a semiconductor factory was used, and the TOC value (total organic carbon) before the process of the said organic matter containing waste water was 84 ppm.

  On the other hand, the TOC value of the organic matter-containing wastewater (treated water 45) after the treatment for one month was 44 ppm.

  Note that the present invention is not limited to the configurations described above, and various modifications can be made within the scope of the claims, and technical means disclosed in different embodiments and examples, respectively. Embodiments and examples obtained by appropriately combining the above are also included in the technical scope of the present invention.

  According to the present invention, contaminants (for example, organic substances) contained in the treated water can be effectively removed. Therefore, the present invention can be used not only in the field of manufacturing various water treatment devices represented by waste water treatment devices and water purification devices and parts thereof, but also in high purity liquid from which contaminants are removed. It can be widely applied to fields where it is necessary to use.

It is a schematic diagram which shows one Embodiment of the water treatment apparatus in this invention. It is a schematic diagram which shows other embodiment of the water treatment apparatus in this invention. It is a schematic diagram which shows other embodiment of the water treatment apparatus in this invention. It is a schematic diagram which shows other embodiment of the water treatment apparatus in this invention. It is a schematic diagram which shows other embodiment of the water treatment apparatus in this invention. It is a schematic diagram which shows other embodiment of the water treatment apparatus in this invention. It is a schematic diagram which shows other embodiment of the water treatment apparatus in this invention. It is a schematic diagram which shows other embodiment of the water treatment apparatus in this invention. It is a schematic diagram which shows other embodiment of the water treatment apparatus in this invention. It is a schematic diagram which shows other embodiment of the water treatment apparatus in this invention. It is a schematic diagram which shows other embodiment of the water treatment apparatus in this invention. It is a schematic diagram which shows other embodiment of the water treatment apparatus in this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st tank 2 Gas-liquid mixing circulation pump 3 1st gas shearing part 4 2nd gas shearing part 6 3rd gas shearing part 5 * 7 * 8 * 10 * 13 * 22 * 46 pipe | tube 9 Electric needle valve 11 Signal line 12 Blower 14 Sequencer 15 2nd tank (processing tank)
16 Carrier 17 Water flow generation pipe (draft)
18 Air bubbles 19 Air diffuser (first air diffuser)
20.53 Underwater stirrer (stirring means)
21 Support Plate 24 Circulation Pump 25 Gas Shearing Part 26 Water Flow 27 Submersible Pump Type Micro / Nano Bubble Generation Part 28 Small Blower 29/30/31 Electric Valve 32/33 Air Diffuser (Second Air Diffusing Unit)
34 Left inclined wall 35 Right inclined wall 36 Inflow pipe 39 Water containing organic fluorine compound 40 Rapid filtration tower 41 Activated carbon adsorption tower 42 Nano bubble generating part (bubble generating means)
43 Micro-nano bubble generating part (bubble generating means)
44 Factory wastewater 45 Treated water 47 Redox potential meter 48 Redox potential controller 51 Screen container (filter)
52 Air diffuser for cleaning (third air diffuser)
54 Convex

Claims (23)

  1. Bubble generating means for generating micro-nano bubbles or nano bubbles in the treated water;
    A treatment tank for introducing the treated water after the micro-nano bubbles or nano-bubbles are generated;
    A support made of polyvinyl alcohol provided so as to be in contact with the treated water introduced into the treatment tank,
    The carrier has pores, and microorganisms are immobilized on the carrier.
    The treatment tank is provided with an opening for discharging treated water introduced into the treatment tank,
    The opening is isolated from the carrier by a filtration filter;
    The inner surface of the treatment tank is provided with a protrusion that protrudes toward the center of the cross section of the treatment tank, and the protrusion is divided into an upper tank and a lower tank by the protrusion.
    The water treatment apparatus, wherein the opening is provided above the convex portion.
  2. The water treatment apparatus according to claim 1, wherein the pore diameter is 19 μm to 21 μm.
  3.   In the treatment tank, a first air diffuser for discharging gas to the treated water introduced into the treatment tank, and the treatment water introduced into the treatment tank are stirred to generate a water flow. The water treatment device according to claim 1, further comprising a stirring unit for causing the water treatment.
  4. The first air diffuser and the agitator are both provided in a cylindrical draft,
    The two openings of the draft are disposed so as to face the bottom surface of the treatment tank or the water surface of the treatment water introduced into the treatment tank, respectively. Water treatment equipment.
  5.   5. The water treatment apparatus according to claim 4, wherein the agitation unit is disposed closer to the bottom surface of the treatment tank than the first aeration unit in the draft.
  6.   The water treatment apparatus according to claim 5, wherein the stirring unit generates a water flow toward a bottom surface of the treatment tank.
  7.   The water treatment apparatus according to any one of claims 3 to 6, wherein the stirring means is an underwater aerator.
  8. An oxidation-reduction potentiometer for measuring the oxidation-reduction potential of the treated water introduced into the treatment tank;
    And a sequencer for adjusting the amount of gas discharged by the first air diffuser and the flow rate of water generated by the agitator based on the measurement result of the oxidation-reduction potentiometer. The water treatment apparatus of any one of Claims 3-7.
  9.   The water treatment apparatus according to claim 1, wherein the treatment tank is provided with a lid.
  10.   The water treatment apparatus according to any one of claims 1 to 9, wherein the carrier is provided so as to be able to flow in the treatment tank.
  11.   The part of the carrier is provided so as to be flowable in the processing tank, and the rest of the carrier is fixed and provided in the processing tank. The water treatment apparatus according to item 1.
  12.   The water treatment apparatus according to claim 3, further comprising a second air diffuser for discharging gas to the treated water introduced into the treated tank on the bottom surface of the treated tank. .
  13.   The water treatment apparatus according to any one of claims 1 to 12, wherein the bubble generating means is a submersible pump type bubble generator.
  14. The shape of the cross section of the processing tank is defined by a quadrangle having a first side having a length of a (m) and a second side having a length of b (m), and the processing tank Is defined by c (m),
    The ratio shown by c: a and c: b is 1: 1.0-1.3, and the water treatment apparatus of any one of Claims 1-13 characterized by the above-mentioned.
  15.   The water treatment device according to claim 12, wherein gas is discharged by a third air diffuser toward the filtration filter.
  16.   The water treatment device according to claim 1, wherein a shape of a vertical section of the convex portion is a triangle.
  17.   The water treatment apparatus according to any one of claims 1 to 16, further comprising a rapid filtration tower or an activated carbon adsorption tower into which the treated water in the treatment tank is introduced.
  18. A bubble generating step for generating micro-nano bubbles or nano bubbles in the treated water;
    An introduction step of introducing the treated water into the treatment tank after the micro-nano bubbles or nano bubbles are generated;
    A contact step of bringing the treated water introduced into the treatment tank into contact with a carrier made of polyvinyl alcohol,
    The carrier has pores, and microorganisms are immobilized on the carrier.
    The treatment tank is provided with an opening for discharging treated water introduced into the treatment tank,
    The opening is isolated from the carrier by a filtration filter;
    The inner surface of the treatment tank is provided with a protrusion that protrudes toward the center of the cross section of the treatment tank, and the protrusion is divided into an upper tank and a lower tank by the protrusion.
    The said opening is provided above the said convex part, The water treatment method characterized by the above-mentioned.
  19. The water treatment method according to claim 18, wherein the pore diameter is 19 μm to 21 μm.
  20. A gas discharge step of discharging gas to the treated water introduced into the treatment tank;
    The water treatment method according to claim 18, further comprising a stirring step of stirring the treated water introduced into the treatment tank.
  21.   21. The water according to claim 20, wherein the gas discharge step alternately repeats a discharge step of discharging gas to the treated water and a non-discharge step of not discharging gas to the treated water. Processing method.
  22.   The method according to any one of claims 18 to 21, further comprising a filtration step of applying the treated water to a rapid filtration tower or an adsorption step of applying the treated water to an activated carbon adsorption tower after the contacting step. Water treatment method.
  23.   The water treatment method according to any one of claims 18 to 22, wherein the treated water is organic fluorine compound-containing waste water, industrial water, factory waste water, factory waste water treated water, or clean water.
JP2008043604A 2008-02-25 2008-02-25 Water treatment apparatus and water treatment method Expired - Fee Related JP4879925B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008043604A JP4879925B2 (en) 2008-02-25 2008-02-25 Water treatment apparatus and water treatment method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008043604A JP4879925B2 (en) 2008-02-25 2008-02-25 Water treatment apparatus and water treatment method

Publications (2)

Publication Number Publication Date
JP2009195887A JP2009195887A (en) 2009-09-03
JP4879925B2 true JP4879925B2 (en) 2012-02-22

Family

ID=41140018

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008043604A Expired - Fee Related JP4879925B2 (en) 2008-02-25 2008-02-25 Water treatment apparatus and water treatment method

Country Status (1)

Country Link
JP (1) JP4879925B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5274282B2 (en) * 2009-01-30 2013-08-28 日本リファイン株式会社 Gas-liquid reaction method and gas-liquid reaction apparatus using microbubbles
JP2016104474A (en) 2014-08-22 2016-06-09 有限会社情報科学研究所 Ultrafine bubble manufacturing method and ultrafine bubble water manufacturing device by resonance forming and vacuum cavitation

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03245895A (en) * 1990-02-22 1991-11-01 Nishihara Environ Sanit Res Corp Method for immobilizing anaerobic bacteria
JP2663327B2 (en) * 1993-05-20 1997-10-15 哲夫 西田 Culture treatment tank and water treatment facility with it
JP3335500B2 (en) * 1994-08-03 2002-10-15 シャープ株式会社 Wastewater treatment device and wastewater treatment method
JPH10128364A (en) * 1996-10-29 1998-05-19 Nkk Corp Carrier-separating screen apparatus
JP3441352B2 (en) * 1996-11-28 2003-09-02 株式会社クラレ Polyvinyl alcohol-based hydrogel and method for producing the same
JP3385306B2 (en) * 1997-02-28 2003-03-10 株式会社クラレ Wastewater treatment equipment
JP3370576B2 (en) * 1997-10-09 2003-01-27 シャープ株式会社 Ultrapure water production equipment
JP2000288568A (en) * 1999-04-06 2000-10-17 Ataka Construction & Engineering Co Ltd Sewage treatment apparatus
JP3942307B2 (en) * 1999-05-07 2007-07-11 日本碍子株式会社 Flow separator for carrier
JP4313934B2 (en) * 2000-07-21 2009-08-12 株式会社神鋼環境ソリューション Underwater stirring type diffuser
JP4318875B2 (en) * 2001-09-13 2009-08-26 アタカ大機株式会社 Water treatment equipment
JP2004089759A (en) * 2002-08-29 2004-03-25 Taiho Ind Co Ltd Biochemical reactor
US7494588B2 (en) * 2004-01-13 2009-02-24 Itochu Forestry Corp. Wastewater purification system
JP4088630B2 (en) * 2005-02-28 2008-05-21 シャープ株式会社 Wastewater treatment equipment
JP4029100B2 (en) * 2005-09-14 2008-01-09 シャープ株式会社 Water treatment apparatus and water treatment method
JP4490904B2 (en) * 2005-11-22 2010-06-30 シャープ株式会社 Water treatment equipment
BRPI0706720B1 (en) * 2006-01-25 2017-12-12 Kuraray Co., Ltd. Wastewater treatment method
JP4685676B2 (en) * 2006-03-22 2011-05-18 シャープ株式会社 Wastewater treatment equipment
JP2007275847A (en) * 2006-04-11 2007-10-25 Sumitomo Heavy Industries Environment Co Ltd Wastewater treating apparatus and wastewater treating method
JP2007319807A (en) * 2006-06-01 2007-12-13 Aqua House Kk Flow carrier biological treatment tank
JP5209187B2 (en) * 2006-06-07 2013-06-12 シャープ株式会社 Water treatment method and water treatment apparatus

Also Published As

Publication number Publication date
JP2009195887A (en) 2009-09-03

Similar Documents

Publication Publication Date Title
US7922907B2 (en) Process for water treatment
US5240600A (en) Water and wastewater treatment system
JP2869190B2 (en) Wastewater treatment method and equipment
JP3893396B2 (en) Waste water treatment method and waste water treatment equipment
US7798784B2 (en) Water circulation systems for ponds, lakes, and other bodies of water
KR100499177B1 (en) Submersible in-situ oxygenator
US8317165B2 (en) Nanobubble-containing liquid producing apparatus and nanobubble-containing liquid producing method
JP4508694B2 (en) Water treatment method and apparatus
ES2356182T3 (en) Procedure and depuration device of liquid effluents.
US7628912B2 (en) Manufacturing device and application device for liquid containing micro-nano bubbles
US20030042199A1 (en) Wastewater treatment process
KR101028983B1 (en) Apparatus and method for treating liquid
EP0378735A1 (en) Submerged biological wastewater treatment system
JP2008036518A (en) Water treatment method and apparatus
JP2009039600A (en) Ultra-fine bubble production device
JP3890063B2 (en) Waste water treatment apparatus and waste water treatment method
JP4490904B2 (en) Water treatment equipment
US7691268B2 (en) Waste gas/wastewater treatment equipment and method of treating waste gas/wastewater
JP5752608B2 (en) Method and apparatus for cleaning waste liquid
CN103112991B (en) Coking wastewater treatment system and coking wastewater treatment method
EP1767496B1 (en) Water treatment method and water treatment apparatus
KR20160077233A (en) Method and device for the treatment of waste water
US6572774B2 (en) Waste treatment method and apparatus with integral clarifier
CN1275538A (en) Waste water treatment method and equipment
US6824684B2 (en) Wastewater treatment method and apparatus

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20100407

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20110518

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110531

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110728

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110823

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20111019

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20111108

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20111130

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20141209

Year of fee payment: 3

LAPS Cancellation because of no payment of annual fees