Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
  • B01D61/14—Ultrafiltration; Microfiltration
  • B01D61/18—Apparatus therefor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
  • B01D65/08—Prevention of membrane fouling or of concentration polarisation
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F1/00—Treatment of water, waste water, or sewage
  • C02F1/30—Treatment of water, waste water, or sewage by irradiation
  • C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
  • C02F1/325—Irradiation devices or lamp constructions
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F1/00—Treatment of water, waste water, or sewage
  • C02F1/72—Treatment of water, waste water, or sewage by oxidation
  • C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F3/00—Biological treatment of water, waste water, or sewage
  • C02F3/02—Aerobic processes
  • C02F3/12—Activated sludge processes
  • C02F3/1236—Particular type of activated sludge installations
  • C02F3/1268—Membrane bioreactor systems
  • C02F3/1273—Submerged membrane bioreactors
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2315/00—Details relating to the membrane module operation
  • B01D2315/06—Submerged-type; Immersion type
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
  • B01D2321/18—Use of gases
  • B01D2321/185—Aeration
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2201/00—Apparatus for treatment of water, waste water or sewage
  • C02F2201/32—Details relating to UV-irradiation devices
  • C02F2201/322—Lamp arrangement
  • C02F2201/3222—Units using UV-light emitting diodes [LED]
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2305/00—Use of specific compounds during water treatment
  • C02F2305/10—Photocatalysts
• • Y—GENERAL 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
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
  • Y02W10/00—Technologies for wastewater treatment
  • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

• the present invention relates to a wastewater treatment method and wastewater treatment apparatus for treating organic matter-containing wastewater, and is capable of, for example, high-concentration microorganism treatment using a submerged membrane, micro-nanobubble treatment, photocatalytic treatment, and the like.
• the present invention relates to a wastewater treatment apparatus and a wastewater treatment method capable of improving the quality of treated water.
• Patent Document 1 Japanese Patent Laid-Open No. 2004-121962
• This conventional technology exploits the characteristics of nanobubbles such as reduced buoyancy, increased surface area, increased surface activity, generation of a local high-pressure field, and surface-active action and bactericidal action by realizing electrostatic polarization.
• these characteristics are related to each other, so that the dirt component adsorption function, the object surface high-speed cleaning function, the sterilizer It is disclosed that various objects can be cleaned with high performance and low environmental load, and the purification of polluted water can be performed.
• Patent Document 2 Japanese Patent Laid-Open No. 2003-334548 describes a method of generating nanobubbles.
• an object of the present invention is to provide a wastewater treatment method and a wastewater treatment apparatus that can improve the treatment efficiency of wastewater containing organic matter, and can realize the reduction of the components and the running cost.
• the wastewater treatment method of the present invention includes a micro / nano bubble treatment step of treating organic matter-containing waste water with micro / nano bubbles,
• a photocatalytic treatment step of photocatalytically treating the treated water after the microorganism treatment is a photocatalytic treatment step of photocatalytically treating the treated water after the microorganism treatment.
• the treated water obtained by pretreating organic matter-containing wastewater with micronanobubbles in the micro / nano bubble treatment step is subjected to microbial treatment in the microbial treatment step. Therefore, due to the effect of the pretreatment with the micro-nano bubbles, it is possible to reduce the load of organic matter in the subsequent microbial treatment, or to increase the activity of the microbial, and to downsize the microbial treatment apparatus. It becomes possible.
• the treated water after the microbial treatment in the microbial treatment step is photocatalyzed.
• a small amount of organic matter remaining in the treated water is photocatalyzed and advanced treatment exceeding the limit of treatment by microbial treatment becomes possible.
• the waste water treatment apparatus of one embodiment includes a micro / nano bubble reaction tank that treats the organic substance-containing waste water with micro / nano bubbles, and water to be treated from the micro / nano bubble reaction tank.
• An aeration tank that has a submerged membrane and microbially treats the water to be treated;
• the water to be treated from the aeration tank is introduced and a photocatalytic tank for photocatalytically treating the water to be treated is provided.
• the organic matter-containing wastewater is treated with micronanobubbles in a micronanobubble reaction tank and then introduced into an aeration tank having a submerged film.
• the organic matter-containing wastewater before the microorganism treatment in the aeration tank, the organic matter-containing wastewater is treated with the micro / nano bubbles in the micro / nano bubble reaction tank. Therefore, after reducing the organic load by oxidizing the organic matter in the wastewater with micro / nano bubbles, the treated water is effectively introduced into the aeration tank where the microbial concentration is high by the submerged membrane. Organic matter can be processed. Therefore, it is possible to reduce the size of the aeration tank, reduce the scale of the entire apparatus, and reduce the initial cost.
• the wastewater treatment apparatus includes an adjustment tank that is disposed in a preceding stage of the micro-nano bubble reaction tank and that introduces the organic matter-containing wastewater and adjusts the water quality and the amount of the organic matter-containing wastewater.
• the wastewater treatment apparatus of this embodiment after adjusting the water quality and amount of the organic matter-containing wastewater in the adjustment tank, it is introduced into the micro / nano bubble reaction tank, so that the organic matter can be efficiently oxidized with the micro / nano bubbles. .
• the micro-nano bubble reaction tank has a micro-nano bubble generator
• the aeration tank has a water supply section for supplying water to be treated to the micro / nano bubble generator via the submerged membrane.
• the water supply section supplies water to be treated from the aeration tank to the micro / nano bubble generator of the micro / nano bubble reaction tank via the submerged membrane.
• the aeration tank-powered submerged membrane treated water water containing electrolyte
• the micro / nano bubble generator can stably supply extremely small bubbles in the micro / nano bubble reaction tank.
• the aeration tank includes a micro / nano bubble cleaning unit that generates micro / nano bubbles to clean the submerged film.
• the micro / nano bubble cleaning unit can effectively clean the oil / fat that causes the submerged membrane to be blocked by washing the submerged membrane with the generated micro / nano bubbles.
• the aeration tank has an air diffuser for discharging air to the submerged membrane to clean the submerged membrane, and the micro / nano bubble cleaning unit is generated.
• the submerged membrane is washed with a mixed bubble in which micro-nano bubbles and air discharged from the air diffuser are mixed.
• the two kinds of bubbles, the micro-nano bubbles generated by the micro-nano bubble cleaning unit and the large air bubbles discharged from the air diffuser are mixed, and the liquid in the aeration tank is mixed.
• the media can be cleaned. Therefore, the characteristics of each of these two types of bubbles can be demonstrated, and a synergistic effect of the two types of bubbles can be expected, and the submerged membrane can be washed more reliably. That is, air bubbles having a diffused tube force move toward the submerged membrane, whereby micro-nano bubbles having an excellent cleaning effect can be guided to the submerged membrane.
• the air diffuser is disposed below the submerged membrane, and the micro / nano bubble cleaning unit is disposed between the submerged membrane and the air diffuser. Has been placed,
• a first guide that is attached to the air diffuser and guides the air discharged from the air diffuser to the micro / nano bubble cleaning unit; A micro-nano bubble attached to the submerged membrane and generated by the micro-nano bubble cleaning unit; and a second guide for guiding the air discharged from the air diffuser to the submerged membrane.
• the first and second guides allow the micro-nano bubbles generated by the micro-nano bubble cleaning unit and the bubbles generated by the air diffuser to be efficiently submerged.
• the submerged membrane can be more reliably washed.
• the aeration tank has a plurality of submerged films arranged in two or more stages in the vertical direction.
• the waste water treatment apparatus of this embodiment since the plurality of submerged films are arranged in two or more stages in the vertical direction in the aeration tank, the installation floor area of the aeration tank can be reduced, and the space-saving apparatus It can be.
• the photocatalyst tank includes the ultraviolet irradiation unit, a photocatalyst plate including a sputtered thin film that is in contact with the treated water and irradiated with ultraviolet rays from the ultraviolet irradiation unit.
• the effect of the photocatalyst on the photocatalyst plate can be promoted by the ultraviolet irradiation unit irradiating the photocatalyst plate with ultraviolet rays.
• the sputtered thin film included in the photocatalyst plate can be made into a dense thin film with strong hardness as a photocatalyst, so there is no worry about abrasion or peeling even when a strong water flow is applied.
• the ultraviolet irradiation section can be constituted by a mercury lamp or the like.
• the photocatalyst tank includes
• a photocatalyst plate including a sputtered thin film that is in contact with the water to be treated and is irradiated with the light of the light emitting diode lamp force.
• the photocatalytic plate's effect can be promoted by irradiating the photocatalyst plate with light rays of light-emitting diode lamp power that are not in contact with the water to be treated.
• the light emitting diode lamp does not contain mercury unlike an ultraviolet lamp, it can be an environmentally safe lamp. The above light emitting diode It is desirable to place the drump in a place where the treated water does not reach.
• the photocatalyst substrate includes the sputtered thin film and the substrate, and the substrate is a glass or a quartz plate.
• the substrate included in the photocatalyst substrate is made of glass or a quartz plate, it is inexpensive and easy to manufacture.
• the photocatalyst tank includes a micro / nano bubble generator.
• the photocatalyst tank can improve the efficiency of contact between the treated water and the photocatalyst plate by generating the micro / nano bubble with the micro / nano bubble generator.
• the organic matter remaining in the treated water can be acid-treated in a short time by using two acids, acid by micro-nano bubbles and acid by photocatalyst.
• the aeration tank is treated with biologically treated water or sludge generated after biological treatment.
• treated water that has been biologically treated or sludge generated after biological treatment is introduced into the aerated tank, so that the microbial activity in the aerated tank can be enhanced. That is, in order to cultivate microorganisms at a high concentration, it requires biologically treated water or minerals in sludge generated after biological treatment. If this mineral is insufficient, the activity of the microorganisms will be insufficient.
• biologically treated treated water that is the source of electrolyte ions or sludge generated after biological treatment into the aeration tank, treated water rich in electrolyte can be obtained.
• the photocatalyst tank has a transparent outer wall.
• the photocatalyst tank has a transparent outer wall, so that the photocatalytic action of the photocatalyst plate is performed by external light that passes through the transparent outer wall and irradiates the inside. It is possible to improve the treatment efficiency of treated water by photocatalysis. If the entire surface of the outer wall is transparent, the photocatalytic action can be further improved by the light incident on the entire surface of the upper, lower and side surfaces.
• organic matter-containing substances are obtained by the micro / nano bubble treatment process.
• Water to be treated which is pretreated with micro / nano bubbles, is treated with microorganisms in the microorganism treatment process. Therefore, due to the effect of the pre-treatment with the micro-nano bubbles, the subsequent treatment with enhanced microorganism activity can reduce the load on organic matter, and the size of the device for the treatment of microorganisms can be reduced. Furthermore, by treating the treated water after microbial treatment by the above microbial treatment process with a photocatalyst, a small amount of organic substances remaining in the treated water can be photocatalyzed, and high-level treatment exceeding the limit of microbial treatment is possible. It becomes.
• FIG. 1 is a diagram schematically showing a first embodiment of a waste water treatment apparatus of the present invention.
• FIG. 2 is a diagram schematically showing a second embodiment of the waste water treatment apparatus of the present invention.
• FIG. 3 is a diagram schematically showing a third embodiment of the waste water treatment apparatus of the present invention.
• FIG. 4 is a diagram schematically showing a fourth embodiment of the waste water treatment apparatus of the present invention.
• FIG. 5A is a time chart when the total organic carbon concentration of the organic matter-containing wastewater in the first to fourth embodiments is 80 Oppm.
• FIG. 5B is a time chart when the total organic carbon concentration of the organic matter-containing wastewater in the first to fourth embodiments is 16 OOppm.
• FIG. 1 schematically shows a first embodiment of the waste water treatment apparatus of the present invention.
• the first embodiment includes an adjustment tank 1, a micro / nano bubble reaction tank 3, an aeration tank 7, and a photocatalyst tank 22.
• Organic substance-containing wastewater is introduced into the adjustment tank 1, and the amount and quality of the organic substance-containing wastewater are adjusted to the adjustment tank 1.
• the wastewater introduced into the adjustment tank 1 includes various organic matter-containing wastewater. Examples include wastewater from food factories and organic alkaline wastewater from semiconductor factories. It falls under organic matter-containing wastewater.
• the amount and quality of the organic substance-containing wastewater are adjusted and introduced into the micro / nano bubble reaction tank 3 by the adjustment tank pump 2 as treated water.
• the micro / nano bubble reaction vessel 3 has a micro / nano bubble generator 4 installed therein. An air suction pipe 5 and a water supply pipe 29 are connected to the micro / nano bubble generator 4.
• the air suction pipe 5 introduces air into the micro / nano bubble generator 4, and the water supply pipe 29 generates micro / nano bubbles from the submerged film 17 arranged in the aeration tank 7 by the water pump 19. Supply to machine 4. As a result, the micro-nano bubble generator 4 generates micro-nano bubbles.
• the water supply pipe 29 and the water pump 19 constitute a water supply section.
• a specific example of the nano nano network laboratory can be adopted as a specific example without limiting the manufacturer.
• Auratec Co., Ltd., Resource Development Co., Ltd., and Seika Sangyo Co., Ltd. select micro bubble water production equipment.
• the organic matter in the organic matter-containing wastewater is partially oxidized by the micro / nano bubbles.
• the treated water partially oxidized by the micro / nano bubbles generated from the micro / nano bubble generator 4 in the micro / nano bubble reaction tank 3 is then introduced into the aeration tank 7.
• a circulation pump 6 is provided attached to the aeration tank 7.
• the circulation pump 6 introduces the sludge containing the water to be treated in the aeration tank 7 into the micro / nano bubble reaction tank 3 through the circulation pipe L1.
• the sludge containing the water to be treated introduced into the micro / nano bubble reaction tank 3 is treated with the micro / nano bubbles generated by the micro / nano bubble generator 4 and then returns to the aeration tank 7 again.
• the sludge containing the water to be treated is circulated between the aeration tank 7 and the micro / nano bubble reaction tank 3 by the circulation pump 6.
• the water to be treated can be oxidized with micro-nano bubbles and oxygen can be supplied to the treated water with micro-nano bubbles.
• nanobubbles have always existed in water, and it has become a component to increase the dissolved oxygen concentration.
• Microbubbles are fine bubbles with a diameter of 50 microns (m) or less, shrink in water, and eventually disappear (completely dissolve).
• a nanobubble is a bubble that is smaller than a microbubble, has a diameter of several lOOnm or less (for example, a diameter of 100 to 200 nm), and can be present in water at most. It has been broken.
• the micro / nano bubble can be described as a bubble in which the micro bubble and the nano bubble are mixed.
• the circulating water introduced from the submerged membrane 17 of the aeration tank 7 through the water supply pipe 29 to the micro / nano bubble generator 4 of the micro / nano bubble reaction tank 3 by the circulation pump 6 is oxygenated by the micro / nano bubbles. Will be replenished.
• the nano bubbles contained in the micro-nano bubbles stay in the treated water in the aeration tank 7 for a long period of time, and can maintain the dissolved oxygen in the aeration tank 7 for a long time.
• the blower for aeration has been continuously operated for 24 hours without oxygen being supplied by micro-nano bubbles as in the prior art, whereas in this embodiment, the aeration tank 7 is intermittently aerated with air bubbles discharged from the diffuser pipe 8 via the air pipe 10 from the intermittently operated blower 9 that is intermittently operated.
• the blower 19 By operating the blower 19 intermittently, energy can be saved compared to continuous operation.
• the water pump 19 feeds the water to be treated as described above from the submerged membrane 17 to the micro / nano bubble reaction tank 3.
• the water pump 20 sends the water to be treated from the submerged membrane 17 to the micro / nano bubble generator 15 for cleaning the submerged membrane 17 via the water feeding pipe 13.
• An air suction pipe 14 is connected to the micro / nano bubble generator 15, and air is introduced into the micro / nano bubble generator 15 from the air suction and 14 pipes.
• the water supply pump 21 supplies the water to be treated from the submerged membrane 17 to the micro / nano bubble generator 25 installed in the subsequent photocatalyst tank 22 via the water supply pipe 27.
• the micro-nano bubble generator 25 is connected to an air suction pipe 26. Air is introduced from the tube 26 into the micro / nano bubble generator 25.
• a submerged membrane cover 16 is attached to the submerged membrane 17 as a second guide.
• This submerged membrane cover 16 is used to dispose the ultrafine micro / nano bubbles generated by the micro / nano bubble generator 15 when the air discharged from the diffuser pipe 11 installed below the micro / nano bubble generator 15 rises. It leads to the submerged film 17 together with the 11 discharged air, and serves to effectively contact the submerged film 17.
• a diffuser tube cover 12 is also attached to the diffuser tube 11 connected to the blower 28 as a first guide.
• the air diffuser cover 12 serves to efficiently guide the air discharged from the air diffuser 11 to the micro / nano bubble generator 15. Force that air is supplied from the above blower 28 to the diffuser tube 11 This blower 28 is operated continuously for 24 hours. The reason is that air cleaning of the submerged membrane 17 requires 24 hours of operation.
• the operation of the micro / nano bubble generator 15 may be determined in relation to the degree of clogging of the submerged film 17. That is, generally, when the water to be treated contains a large amount of oil and fat, the operation time of the micro / nano bubble generator 15 is relatively long. Air supplied from the blower 28 to the diffuser tube 11 is discharged from the diffuser tube 11 to clean the surface of the submerged membrane 17 A mixed bubble of the air discharged from the diffuser tube 11 and the micro / nano bubbles Of course, the cleaning effect of the submerged membrane 17 is higher.
• biologically treated water or biologically treated sludge is introduced into the aeration tank 7 via the pipe L2.
• phosphorus, potassium, calcium, magnesium contained in biologically treated water or sludge generated after biological treatment Trace elements such as can promote the activity of all microorganisms in the aeration tank 7.
• the trace elements are not contained in the treated water, the treatment without microbial activity is not stable.
• the microbial concentration in this aeration tank 7 is MLSS (Mixed Liquor Suspended Solid) and operates at lOOOOppm or more. Is introduced into the photocatalyst tank 22.
• Gravity pipe 18—A is a pipe capable of deriving water to be treated using a water head difference.
• This photocatalyst tank 22 is provided with an ultraviolet lamp 23 as an ultraviolet irradiation unit at the top. Thus, the water to be treated does not reach the ultraviolet lamp 23.
• a micro / nano bubble generator 25 is installed inside the photocatalyst tank 22.
• a photocatalyst plate 24 is installed between the ultraviolet lamp 23 and the micro / nano bubble generator 25. The photocatalyst plate 24 is in contact with the water to be treated, but the ultraviolet lamp 23 is not in contact with the water to be treated.
• the photocatalyst on the photocatalyst plate 24 and the water to be treated are mixed and stirred by the micro / nano bubble generated from the micro / nano bubble generator 25, and the water to be treated is oxidized by the micro / nano bubble.
• this photocatalyst plate 24 was produced by forming a sputtered thin film on a glass plate by sputtering.
• the ultraviolet lamp 23 contains harmful mercury, it is also possible to adopt an environmentally safe light-emitting diode lamp instead of the ultraviolet lamp 23.
• the water supplied to the micro / nano bubble generator 25 is water to be treated supplied from the water pump 21 connected to the submerged membrane 17 through the water pipe 27.
• treated water is obtained from the outlet of the photocatalyst tank 22.
• the organic matter-containing waste water is treated with the micro / nano bubble in the micro / nano bubble reaction tank 3 and then introduced into the aeration tank 7 having the submerged film 17.
• the treatment of the microorganisms with micro-nano bubbles is increased, and at the same time, organic wastewater is treated with micro-nano bubbles in the micro-nano bubble reaction tank 3 before the microbial treatment in the aeration tank 7. Can reduce the scale of the entire device and reduce the initial cost.
• treated water is introduced into the aeration tank 7 where the microbial concentration is high due to the submerged membrane 17. Can effectively treat organic matter.
• a high degree of acidification treatment of a small amount of organic matter which is impossible only by microbial treatment, can be performed by oxidation treatment with a photocatalyst.
• the photocatalyst tank 22 can improve the efficiency of contact between the water to be treated and the photocatalyst plate 24 by generating the micro / nano bubbles with the micro / nano bubble generator 25.
• the organic matter remaining in the treated water can be oxidized in a short period of time by using two acids, ie, acid by micro-nano bubbles and acid by photocatalyst. Therefore, according to the first embodiment, it is possible to improve the treatment efficiency of the organic matter-containing wastewater, and to reduce the scale of the wastewater treatment device and the running cost.
• the water supply pump 19 and the water supply pipe 29 forming the water supply section are configured so that the water to be treated passes from the aeration tank 7 through the submerged film 17 to the micro / nano bubble reaction tank 3.
• Water is sent to the existing micro / nano bubble generator 4.
• the submerged membrane treated water containing the electrolyte is fed from the aeration tank 7 which is a high-concentration microorganism device using the submerged membrane 17 to the micro / nanopub generator 4.
• the micro / nano bubble generator 4 can stably supply extremely fine bubbles in the micro / nano bubble reaction tank 3.
• FIG. 2 shows a second embodiment of the waste water treatment apparatus of the present invention.
• This second embodiment differs from the first embodiment only in that another submerged film 117 is provided on the upper stage of the submerged film 17 installed in the aeration tank 7N. Therefore, in the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted, and parts different from those in the first embodiment are described.
• a submerged film 117 is arranged on the upper stage of the submerged film 17, and the two submerged films 17 and 117 are three-dimensionally installed. Therefore, there is an advantage that the micro-nano bubbles and the cleaning air that increase the downward force of the submerged membranes 17 and 117 without increasing the installation floor area of the aeration tank 7 can be effectively used in three dimensions.
• FIG. 3 shows a third embodiment of the waste water treatment apparatus of the present invention.
• This third embodiment differs in force from the first embodiment described above only in that the aeration tank 7V is filled with the polysalt vinylidene filling 30. Therefore, in the third embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, detailed description thereof is omitted, and parts different from those in the first embodiment are described.
• the polyvinyl chloride polyvinylidene filling 30 is filled in the aeration tank 7V, the average of the entire aeration tank 7V is compared with the case where the filling 30 is not present. Concentration can be high. In addition, since microorganisms adhere to and propagate on the polysalt / vinylidene packing 30, the microorganisms are more stable and improve the ability to treat organic matter in wastewater containing organic matter than when there is no packing. . [0076] It is preferable that the polysalt vinylidene filling 30 is disposed in the entire water tank 7V. In this case, the microbial concentration is high throughout the aeration tank 7V.
• microorganisms propagate in the polyvinyl chloride filler 30 with the passage of time from the trial run of the apparatus.
• concentration of microorganisms on the surface of this polysalt / vinylidene packing 30 is 30000 ppm or more, leading to an increase in the processing efficiency of organic matter.
• the material of the polychlorinated vinylidene filler 30 is strong and not attacked by chemical substances! / Salt / vinylidene, and can be used semipermanently.
• the polyvinyl chloride vinylidene filler 30 may be selected in accordance with the characteristics of the power drainage with products such as biocode, ring lace, biomultileaf, and nano module.
• the third embodiment may be combined with the second embodiment described above.
• FIG. 4 shows a fourth embodiment of the waste water treatment apparatus of the present invention.
• This fourth embodiment differs from the first embodiment only in that a partition plate 31 extending in the vertical direction (vertical direction) is disposed in the vicinity of the approximate center of the aeration tank 7Z. Therefore, in the fourth embodiment, the same parts as those in the first embodiment described above are denoted by the same reference numerals, detailed description thereof is omitted, and different parts from the first embodiment are described.
• the air supplied from the blower 28 and discharged from the diffuser pipe 11 generates an ascending water flow 32A in the aeration tank 7Z, and the ascending water flow 32A is separated from the substantially central partition.
• the plate 31 is moved to the opposite side of the air diffuser 11 over the plate 31, and a descending water flow 32B is formed.
• the inside of the aeration tank 7Z is sufficiently agitated, so that the microbial decomposition of the organic matter in the treated water can be promoted.
• the fourth embodiment may be combined with the second and third embodiments described above.
• An experimental device having the same structure as the waste water treatment device of the first embodiment shown in FIG. 1 was manufactured.
• the capacity of the adjustment tank 1 is 50 liters
• the capacity of the micro / nano bubble reaction tank 3 is 20 liters
• the capacity of the aeration tank 7 is 200 liters.
• the microbial concentration was set to about 14000 ppm.
• the organic matter concentration in the organic matter-containing wastewater discharged from the factory was measured as the total organic carbon (TOC)
• TOC total organic carbon
• the wastewater that was 860 ppm was continuously introduced into the adjustment tank 1. It was. After that, after waiting for the water quality to stabilize for one month, the total organic carbon content of the treated water that can also obtain the outlet force of the gravity pipe 18-B was 12 ppm.
• Fig. 5A shows an example of a time chart in the first to fourth embodiments when the total organic carbon content of the organic matter-containing wastewater is 800 ppm
• Fig. 5B shows the total organic carbon concentration of the organic matter-containing wastewater is 1600 ppm.
• An example of a time chart in the first to fourth embodiments is shown.
• the photocatalytic action of the photocatalyst plate 24 is caused by the external light that passes through the transparent outer wall and irradiates the inside. And the treatment efficiency of treated water by photocatalysis can be improved.
• the photocatalytic action can be further improved by the light incident on the entire upper, lower, and lateral forces.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Water Supply & Treatment (AREA)
• Life Sciences & Earth Sciences (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Hydrology & Water Resources (AREA)
• Environmental & Geological Engineering (AREA)
• Biodiversity & Conservation Biology (AREA)
• Toxicology (AREA)
• Health & Medical Sciences (AREA)
• Microbiology (AREA)
• Physical Water Treatments (AREA)
• Catalysts (AREA)
• Treatment Of Water By Oxidation Or Reduction (AREA)
• Separation Using Semi-Permeable Membranes (AREA)
• Activated Sludge Processes (AREA)
• Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
• Treatment Of Sludge (AREA)
• Biological Treatment Of Waste Water (AREA)

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• 2005
  • 2005-03-04 JP JP2005060613A patent/JP3893396B2/ja not_active Expired - Fee Related
• 2006
  • 2006-01-31 US US11/816,985 patent/US7641802B2/en not_active Expired - Fee Related
  • 2006-01-31 WO PCT/JP2006/301551 patent/WO2006095509A1/ja not_active Ceased
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