WO2023048066A1 - 有機性排水処理システム - Google Patents

有機性排水処理システム Download PDF

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Publication number
WO2023048066A1
WO2023048066A1 PCT/JP2022/034617 JP2022034617W WO2023048066A1 WO 2023048066 A1 WO2023048066 A1 WO 2023048066A1 JP 2022034617 W JP2022034617 W JP 2022034617W WO 2023048066 A1 WO2023048066 A1 WO 2023048066A1
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WO
WIPO (PCT)
Prior art keywords
water
treatment
treatment tank
tank
treatment system
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.)
Ceased
Application number
PCT/JP2022/034617
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
健史 矢嶌
隆司 山口
将史 幡本
高大 渡利
アブバカル ヌルアデリンビンティ
徹 三輪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nagaoka University of Technology NUC
Tokyo Electric Power Co Holdings Inc
Original Assignee
Nagaoka University of Technology NUC
Tokyo Electric Power Co Holdings Inc
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 Nagaoka University of Technology NUC, Tokyo Electric Power Co Holdings Inc filed Critical Nagaoka University of Technology NUC
Priority to JP2023549516A priority Critical patent/JP7726492B2/ja
Publication of WO2023048066A1 publication Critical patent/WO2023048066A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • C02F3/04—Aerobic processes using trickle filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/232—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles
    • B01F23/2326—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles adding the flowing main component by suction means, e.g. using an ejector
    • 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 system that treats organic wastewater.
  • Aerobic microorganisms have traditionally been used to treat organic wastewater (biological treatment). Oxygen must be supplied to activate such aerobic microorganisms.
  • One method for supplying oxygen to aerobic microorganisms is the trickling filter method.
  • the trickling filter method the water to be treated is sprinkled in the treatment tank, and the biofilm formed on the surface of the filler (crushed stone, etc.) filled in the treatment tank reacts with the water to be treated. We are decomposing the target substances inside.
  • the DHS method Downflow Hanging Sponge
  • water to be treated is sprinkled from the top of a reaction tank filled with sponge carriers, and the water to be treated flows down while coming into contact with microorganisms growing on the sponge carriers to decompose the target.
  • the contact reaction between the sponge carrier, which is the filler, and the water to be treated there is Sufficient time can be obtained for the contact reaction between the sponge carrier, which is the filler, and the water to be treated.
  • a thin biofilm is formed only on the surface of the filler used in the trickling filter method, microorganisms live inside the sponge carrier used in the DHS method.
  • the DHS method can improve the treatment efficiency of the water to be treated.
  • Patent Literature 1 discloses a water spray purification device using the DHS method.
  • a processing space formed in a hollow tank is filled with a water retaining body as a filler.
  • a water-retaining body has a cylindrical core material having a shape-retaining property capable of forming an air passage inside while being filled and arranged in the treatment space, and microorganisms can adhere and grow on the inner and outer surfaces of the cylindrical core material.
  • a coated carrier layer of fibrous or porous material is formed. The air passage of the cylindrical core member is opened so that the air can freely pass through the coated carrier layer in a state where the microorganisms are adhered and grown.
  • an air supply pipe is provided in the treatment space to supply the oxygen-containing gas in parallel with the treated water.
  • the aerobic decomposition of treated water by microorganisms is promoted by supplying an oxygen-containing gas to the water-retaining body.
  • the space formed by the air passage is formed in the water holding body, the oxygen-containing gas circulating in the space is efficiently supplied to the microorganisms, and high decomposition treatment efficiency of the treated water is realized.
  • Patent Document 1 In the configuration in which the oxygen-containing gas is simply supplied into the hollow tank as in Patent Document 1, the oxygen-containing gas efficiently reaches the microorganisms in the coated carrier layer near the connecting portion of the air supply pipe in the hollow tank. However, it is difficult to distribute the oxygen-containing gas throughout the processing space within the hollow tank. Therefore, the technique of Patent Document 1 has room for further improvement.
  • the present invention is an organic wastewater treatment capable of efficiently supplying oxygen to the entire treatment tank serving as a treatment space and further improving the treatment efficiency of organic wastewater.
  • the purpose is to provide a system
  • a representative configuration of the organic wastewater treatment system comprises a treatment tank for storing the fluid, which is organic wastewater, and a carrier accommodated in the treatment tank and carrying aerobic microorganisms. , a water purification pump that pumps up the treated water stored in the lower part of the treatment tank, circulates it to the treatment tank and sends it to the outside, an ejector that is arranged in the path of the water purification pump and generates fine bubbles, and the downstream side of the ejector. and a nozzle that is in communication with and sprays treated water into the treatment tank.
  • the treated water in the treatment tank circulates while passing through the ejector.
  • fine air bubbles microbubbles
  • microbubbles have a large surface area
  • oxygen easily dissolves in water, and the oxygen concentration in water can be increased, and the amount of dissolved oxygen in water supplied with microbubbles increases. Therefore, by sprinkling treated water containing a large amount of dissolved oxygen into the treatment tank from the nozzle, oxygen can be efficiently supplied to the entire treatment tank serving as a treatment space.
  • aerobic microorganisms can be activated in the entire treatment tank, making it possible to further improve the treatment efficiency of organic wastewater.
  • a water level sensor that detects the water level of the treated water stored in the lower part of the treatment tank, and a control unit that controls the operation of the water purification pump. It is preferable to operate the water purification pump and stop the water purification pump when the water level becomes less than a predetermined value.
  • the water purification pump when the water level reaches or exceeds a predetermined value, that is, when a certain amount of treated water accumulates in the lower portion of the treatment tank, the water purification pump is operated to send out part of the treated water to the outside. As a result, it is possible to suitably prevent the treated water from overflowing from the treatment tank when the treatment tank is full.
  • the water purification pump is stopped to store the treated water. This makes it possible to suppress drying of the carrier and prevent death of the aerobic microorganisms carried on the carrier.
  • a lid serving as the top surface of the processing tank should be provided, and the nozzle should spray the treated water toward the bottom surface of the lid.
  • the treated water can be efficiently sprayed over a wider area than when the treated water is simply sprayed by the nozzle.
  • a plurality of protrusions projecting downward are formed on the rear surface of the lid. This makes it possible to increase the diffusion efficiency during watering.
  • the water purification pump can be driven even in places where commercial power is not supplied.
  • an organic wastewater treatment system capable of efficiently supplying oxygen to the entire treatment tank serving as a treatment space and further improving the treatment efficiency of organic wastewater. can be done.
  • FIG. 1 is a schematic diagram of an organic wastewater treatment system according to this embodiment
  • FIG. Figure 3 illustrates the carrier of Figure 2
  • Fig. 3 is a perspective view of a lid
  • 1 is a schematic diagram of an organic wastewater treatment system according to another embodiment
  • FIG. 1 is a diagram illustrating a wastewater treatment facility 200 equipped with an organic wastewater treatment system (hereinafter referred to as treatment system 100) according to this embodiment.
  • the wastewater treatment facility 200 illustrated in FIG. 1 includes a sedimentation tank 210, the treatment tank 110 of the treatment system 100 of the present embodiment, a sand filter tank 220 and a storage tank 230.
  • water organic wastewater from a river or the like is sent to a sedimentation tank 210 by a pump 202 .
  • sedimentation tank 210 sediment removal processing for solids such as sand is performed.
  • the treated water that has undergone the sediment removal treatment is sent to the treatment tank 110 of this embodiment by the pump 212 .
  • organic substances in the treated water are decomposed by biological treatment using aerobic microorganisms and ammonia is oxidized, which will be described later.
  • the treated water that has undergone decomposition of organic matter and the like is sent to the sand filter tank 220 by the water purification pump 140 of the treatment system 100 .
  • the sand filter tank 220 fine solids are removed.
  • the treated water from which solids have been removed is sent to the storage tank 230 .
  • the storage tank 230 stores the treated water sent from the sand filter tank 220, and performs finishing treatment such as adsorption treatment of harmful substances using microbial activated carbon and disinfection treatment.
  • the treated water that has undergone finishing treatment is supplied to external water use equipment by a pump 232 .
  • FIG. 2 is a schematic diagram of an organic wastewater treatment system (treatment system 100) according to this embodiment.
  • the treatment system 100 of this embodiment includes a treatment tank 110 that stores a fluid that is organic waste water.
  • a pump 212 of the sedimentation tank 210 is connected to the processing tank 110 through the supply pipe 102 , and the fluid after the sedimentation removal treatment in the sedimentation tank 210 is supplied through the supply pipe 102 .
  • the supply pipe 102 is connected to a nozzle 104 arranged above the processing tank 110 , and the fluid supplied to the processing tank 110 is sprayed into the processing tank 110 by the nozzle 104 .
  • a carrier 130 carrying aerobic microorganisms is accommodated inside the treatment tank 110 shown in FIG. As described above, the fluid sprayed from the nozzles 104 comes into contact with the carrier 130 as it flows down inside the processing tank 110 . As a result, a contact reaction with aerobic microorganisms (not shown) supported by the carrier 130 occurs, and the organic matter contained in the fluid is decomposed.
  • FIG. 3 is a diagram illustrating the carrier 130 of FIG.
  • the carrier 130 includes a porous body 132 that supports aerobic microorganisms and absorbs water, and a frame 134 that retains the shape of the porous body 132 .
  • a porous body 132 a polymeric material having countless fine pores, such as sponge, can be suitably used.
  • the frame 134 a highly rigid synthetic resin material can be suitably used.
  • the material of the carrier 130 may be composed of biodegradable fibers.
  • biodegradable fibers As a specific example, coconut husk can be preferably used.
  • the carrier 130 itself is also slowly biodegraded, so that the amount of industrial waste can be reduced and the environmental load can be reduced.
  • the decomposition speed for example, organic substances contained in the treated water are decomposed in a cycle of several days, while the carrier 130 is decomposed in about one year.
  • the carrier 130 may be additionally replenished.
  • the carrier 130 may be formed by punching a block of biodegradable fiber into a cylindrical shape.
  • the cylindrical carrier 130 may be formed by punching a mat made of biodegradable fibers into disk shapes and connecting a plurality of disks with biodegradable fasteners.
  • the fluid that has passed through the carrier 130 is stored as treated water in the lower part of the treatment tank 110, and is pumped up through the purified water path 142 by the purified water pump 140 at a predetermined timing.
  • a predetermined amount of the pumped-up treated water is delivered to an external facility (not shown) through delivery path 144 , and the rest is circulated to treatment tank 110 through circulation path 146 .
  • an ejector 150 that generates fine bubbles is arranged in the path of the water purification pump 140, that is, the water purification path 142. As the treated water passes through the ejector 150, the outside air is taken in from the suction port 152, and microbubbles are generated in the treated water. The treated water that has passed through the ejector 150 is sprayed into the treatment tank 110 by the nozzle 120 communicating with the downstream side of the ejector 150 .
  • Microbubbles have a larger surface area, so oxygen is easier to dissolve in water, and the oxygen concentration in water can be increased, and the amount of dissolved oxygen in water supplied with microbubbles increases. Therefore, by sprinkling treated water containing a large amount of dissolved oxygen into the treatment tank 110, oxygen can be supplied to the entire treatment tank 110 efficiently. As a result, the aerobic microorganisms carried on the carrier 130 can be activated throughout the treatment tank 110, and the efficiency of treating organic waste water can be further improved.
  • air and thus oxygen can be supplied to the treated water without forced ventilation, that is, while minimizing the amount of air supplied to the treatment tank 110. . Therefore, it is possible to avoid diffusion of odor to the surroundings that occurs when forced ventilation is performed.
  • connection path 148 connecting the treatment tank 110 and the water purification pump 140 includes a water level sensor 160 for detecting the water level of treated water stored in the lower part of the treatment tank 110. , and a control unit 190 that controls the operation of the water purification pump 140 .
  • the control unit 190 operates the water purification pump 140 when the water level of the treated water detected by the water purification pump 140 reaches or exceeds a predetermined value. According to this configuration, when the treated water is accumulated to some extent in the lower portion of the treatment tank 110, part of the treated water pumped up by the water purification pump 140 is delivered to the outside. Therefore, it is possible to suitably prevent the treated water from overflowing from the treatment tank 110 when the treatment tank 110 is full.
  • the water level sensor 160 operates the water purification pump 140 according to the water level, so that the number of times the water purification pump 140 is started increases, and the amount of oxygen supplied to the carrier 130 can be increased. It is possible to increase the efficiency of the contact reaction of
  • the water level sensor 160 stops the water purification pump 140 when the water level of the treated water falls below a predetermined value. According to such a configuration, when the amount of treated water inside the treatment tank 110 becomes extremely small, the supply of treated water to an external facility (not shown) is stopped and the treated water is stored in the treatment tank 110 . This makes it possible to suppress drying of the carrier 130 and prevent death of the aerobic microorganisms carried on the carrier 130 .
  • the processing system 100 of this embodiment also includes a lid 170 that serves as the top surface of the processing tank 110 , and the nozzles 104 and 120 spray treated water toward the bottom surface of the lid 170 .
  • the treated water can be evenly and efficiently sprayed over a wider area than when the nozzles 104 and 120 simply spray the treated water (downward). Therefore, it is possible to promote the activation of aerobic microorganisms and improve the treatment efficiency of organic wastewater.
  • FIG. 4 is a perspective view of the lid 170, and is a perspective view of the lid 170 observed from below.
  • a plurality of projections 172 projecting downward are formed on the rear surface 170a of the lid 170.
  • the plurality of protrusions 172 are arranged radially at equal intervals on the rear surface 170a of the lid 170. As shown in FIG. With such an arrangement, it is possible to obtain a high diffusion effect as compared with the case of locally dense arrangement or the overall sparse arrangement.
  • the treatment system 100 of this embodiment includes a solar panel 180 that generates power to power the water purification pump 140 , and the power generated by the solar panel 180 is supplied to the solar panel 180 through a power line 182 .
  • the water purification pump 140 can be driven even in places where commercial power is not supplied. Therefore, it can be used by temporarily installing it in a disaster area where there is a power outage, or by installing it in a mountainous area where electricity is not available.
  • FIG. 5 is a schematic diagram of an organic wastewater treatment system according to another embodiment.
  • the same reference numerals are assigned to the portions whose description overlaps with that of the processing system 100 shown in FIG. 2, and the description thereof is omitted.
  • a clean water channel 142 , an ejector 150 and a nozzle 120 are also central to the processing tank 110 , as is the clean water pump 140 .
  • the rear surface of the lid 270 is formed in a dome shape.
  • a dome shape is a hemispherical surface that is concave upward.
  • the treated water that has passed through the ejector 150 is sprayed from the nozzle 120 onto the center of the dome.
  • the treated water supplied from the pump 212 through the supply pipe 102 is also sprayed from the nozzle 104 to the center of the dome.
  • the treated water sprayed from the nozzles 104 and 120 spreads along the wall surface of the dome of the lid 270 and spreads widely over the upper surface of the carrier 130 .
  • the present invention can be used as a wastewater treatment system for treating organic wastewater.
  • DESCRIPTION OF SYMBOLS 100 Treatment system, 102... Supply pipe, 110... Treatment tank, 104, 120... Nozzle, 130... Carrier, 132... Porous body, 134... Frame, 140... Water purification pump, 142... Water purification path, 144... Delivery path , 146... circulation path, 148... connection path, 150... ejector, 152... suction port, 160... water level sensor, 170... lid, 180... solar panel, 182... power line, 190... control section, 200... waste water treatment facility, 202 ... pump, 210 ... sedimentation tank, 212 ... pump, 220 ... sand filter tank, 230 ... storage tank, 232 ... pump

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  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Biological Treatment Of Waste Water (AREA)
PCT/JP2022/034617 2021-09-21 2022-09-15 有機性排水処理システム Ceased WO2023048066A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2023549516A JP7726492B2 (ja) 2021-09-21 2022-09-15 有機性排水処理システム

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021-153108 2021-09-21
JP2021153108 2021-09-21

Publications (1)

Publication Number Publication Date
WO2023048066A1 true WO2023048066A1 (ja) 2023-03-30

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PCT/JP2022/034617 Ceased WO2023048066A1 (ja) 2021-09-21 2022-09-15 有機性排水処理システム

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4919659A (https=) * 1972-06-13 1974-02-21
JPS6212477Y2 (https=) * 1983-02-25 1987-03-31
JPH07185241A (ja) * 1993-12-28 1995-07-25 Nittetsu Mining Co Ltd 細粒セラミックス瀘材及びその製造方法並びに該瀘材を用いた瀘過装置
JP2003251340A (ja) * 2002-03-05 2003-09-09 Mitsubishi Heavy Ind Ltd 水処理装置
JP2005199182A (ja) * 2004-01-15 2005-07-28 National Agriculture & Bio-Oriented Research Organization 汚水処理装置
JP2009028683A (ja) * 2007-07-30 2009-02-12 Sanyo Electric Co Ltd 水処理システム

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4919659A (https=) * 1972-06-13 1974-02-21
JPS6212477Y2 (https=) * 1983-02-25 1987-03-31
JPH07185241A (ja) * 1993-12-28 1995-07-25 Nittetsu Mining Co Ltd 細粒セラミックス瀘材及びその製造方法並びに該瀘材を用いた瀘過装置
JP2003251340A (ja) * 2002-03-05 2003-09-09 Mitsubishi Heavy Ind Ltd 水処理装置
JP2005199182A (ja) * 2004-01-15 2005-07-28 National Agriculture & Bio-Oriented Research Organization 汚水処理装置
JP2009028683A (ja) * 2007-07-30 2009-02-12 Sanyo Electric Co Ltd 水処理システム

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JP7726492B2 (ja) 2025-08-20
JPWO2023048066A1 (https=) 2023-03-30

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