WO2023112615A1 - Carrier flow tank and septic tank - Google Patents

Carrier flow tank and septic tank Download PDF

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Publication number
WO2023112615A1
WO2023112615A1 PCT/JP2022/043138 JP2022043138W WO2023112615A1 WO 2023112615 A1 WO2023112615 A1 WO 2023112615A1 JP 2022043138 W JP2022043138 W JP 2022043138W WO 2023112615 A1 WO2023112615 A1 WO 2023112615A1
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Prior art keywords
carrier
tank
fluidizing
section
treated
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PCT/JP2022/043138
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French (fr)
Japanese (ja)
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西川信彦
西田光希
服部弘二
喜多亮夫
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株式会社クボタ
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Publication of WO2023112615A1 publication Critical patent/WO2023112615A1/en

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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
    • C02F3/06—Aerobic processes using submerged filters
    • 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
    • C02F3/08—Aerobic processes using moving contact bodies
    • 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 septic tank equipped with a carrier fluidization tank.
  • the septic tank shown in Patent Document 1 includes a carrier fluidizing tank for aerobic treatment with an air diffusion unit that supplies air bubbles to the carrier, and a carrier fluidizing tank downstream of the carrier fluidizing tank in which a plurality of carriers are sedimented and accumulated. and a filter tank formed with layers.
  • the size of the bubble diameter of the air bubbles supplied from the air diffuser depends on the size of the discharge hole of the air diffuser. Therefore, in order to increase the oxygen dissolution efficiency by reducing the bubble diameter, it is necessary to make the discharge hole of the air diffuser smaller, and as a result, there is a problem that the air diffuser is easily clogged.
  • the present invention has been made in view of the above circumstances, and its purpose is to increase the oxygen dissolution efficiency in the carrier fluidization tank and improve the treatment efficiency by making the septic tank more compact.
  • a feature of the carrier fluidizing tank according to the present invention is that it comprises a carrier fluidizing section that accommodates and holds a plurality of fluidizing carriers that can flow together with the water to be treated while supporting microorganisms, and an air diffuser that supplies air bubbles to the carrier fluidizing section.
  • a flow port through which the water to be treated flows is provided on the bottom surface of the carrier flow section, and the air diffusion pipe is arranged below the flow flow section so that air bubbles are supplied to the carrier flow section through the flow flow section.
  • a filter material filling portion is provided between the advection port of the carrier flowing portion and the air diffusion pipe.
  • the filter medium filling section is provided between the advection port of the carrier flow section and the air diffusion pipe, the air bubbles are made finer in the filter medium filling section, resulting in a smaller bubble diameter and improved oxygen dissolution efficiency. improves. Therefore, it is not necessary to design the air bubble discharge hole of the air diffuser to be smaller, and clogging of the air diffuser is less likely to occur. Furthermore, it is possible to reduce the amount of air bubbles supplied from the air diffuser (blower air volume), leading to a reduction in greenhouse gas emissions and operating costs.
  • an advection port for the water to be treated is provided on the bottom surface of the carrier flowing portion, and the filter medium filling portion is provided so as to cover the entire advection port.
  • the filter material filling portion is provided so as to cover the entire advection port, all the bubbles supplied to the carrier flow portion are supplied in a fine state, and the oxygen dissolution efficiency is is further improved.
  • all of the water to be treated that has been treated in the carrier flow section passes through the filter medium filling section, sludge and the like contained in the water to be treated can be captured more easily.
  • the confluence port is formed at one end in the width direction of the bottom surface of the carrier flowing portion.
  • an upward flow is generated on the side of the tank side wall on the side of the advection port, and a downward flow is generated on the side of the tank side wall opposite to the side of the advection port.
  • a swirling flow is formed that swirls the entire inside of the part.
  • the fluidized carrier swirls throughout the carrier fluidized portion, which promotes contact between the fluidized carrier and dissolved oxygen, and aerobic decomposition of organic matter and ammonium nitrogen by the action of microorganisms adhering to the fluidized carrier. of the nitrification reaction is carried out efficiently.
  • the confluence port is formed in the widthwise central portion of the bottom surface of the carrier flowing portion.
  • the confluence port is formed on substantially the entire bottom surface of the carrier flowing portion.
  • the opening area of the advection port in the carrier flow section is substantially maximized, and more oxygen can be supplied to the carrier flow section.
  • the aerobic decomposition of organic matter and the nitrification reaction of ammonium nitrogen can be further accelerated by the action of microorganisms adhering to the fluid carrier.
  • a plurality of filter media are stacked in the filter media filling portion.
  • the filter layer of the filter medium filling portion is filled with a plurality of stacked filter materials, an appropriate gap is generated between the filter materials, so that bubbles are miniaturized and diffused when passing through the filter layer. is done more efficiently.
  • the sedimentation section is arranged on the same plane as the filter medium filling section.
  • the sedimentation section can be provided in the space below the carrier fluidization tank, and there is no need to provide a sedimentation tank separately, and the septic tank can be made more compact.
  • FIG. 2 is a schematic vertical cross-sectional side view of a carrier fluidizing tank
  • FIG. 11 is a schematic vertical cross-sectional side view of a carrier fluidizing tank according to another embodiment
  • FIG. 11 is a schematic vertical cross-sectional side view of a carrier fluidizing tank according to another embodiment
  • FIG. 11 is a schematic vertical cross-sectional side view of a carrier fluidizing tank according to another embodiment
  • FIG. 11 is a schematic vertical cross-sectional side view of a carrier fluidizing tank according to another embodiment
  • FIGS. 1 to 3 An embodiment of a septic tank according to the present invention will be described below based on the drawings.
  • a solid-liquid separation tank 2 an anaerobic filter bed tank 3, a carrier fluidization tank 4, a treatment tank 5, and a disinfection tank 6 are provided inside the main body of the septic tank 1 according to the present embodiment.
  • the longitudinal direction of the septic tank 1 refers to the direction in which the solid-liquid separation tank 2, the anaerobic filter bed tank 3, and the carrier fluidizing tank 4 are arranged in the septic tank 1, and the width direction of the septic tank 1. , a direction orthogonal to the longitudinal direction in plan view.
  • the raw water to be treated W flows into the solid-liquid separation tank 2 from the inflow part 7, is transferred to the anaerobic filter bed tank 3, the carrier fluidization tank 4, the treatment tank 5, and the disinfection tank 6 in this order, and is treated in each tank. After that, the water is discharged from the discharge unit 8 to the outside of the tank.
  • the solid-liquid separation tank 2 is configured to receive and temporarily store the water to be treated W that has flowed in from the inflow part 7 .
  • relatively large contaminants, solids, oils and fats, etc. contained in the water W to be treated are separated by gravity sedimentation, and floating suspended matter such as scum is stored in the upper part of the tank.
  • floating suspended matter such as scum is stored in the upper part of the tank.
  • sludge is stored at the bottom of the tank.
  • the anaerobic filter bed tank 3 is equipped with an anaerobic filter medium 310, and when the water to be treated W passes through the anaerobic filter medium 310, solid matter is separated, organic matter is decomposed by the action of anaerobic microorganisms, and nitrate/nitrite Nitrogen denitrification is carried out.
  • the carrier fluidizing tank 4 in this embodiment includes a carrier fluidizing section 40 , a filter medium filling section 41 , a sedimentation section 42 and an air diffuser 43 .
  • the carrier fluidizing section 40 accommodates and holds a plurality of fluidizing carriers 400 that can flow together with the water W to be treated while carrying microorganisms.
  • An example of the fluid carrier 400 is a rectangular sponge-like carrier having a specific gravity of about 1.01 and a size of 20 mm ⁇ 20 mm.
  • examples of materials for the fluid carrier 400 include polyurethane (PU).
  • the shape, size, and material of the fluid carrier 400 are not limited to the above configurations, and any configuration can be used as long as the durability and processing performance can be judged to be equal or higher. good.
  • the air diffuser 43 is provided near the bottom of the carrier fluidizing tank 4, and is configured such that air bubbles B are discharged from the air diffuser 43 by air supply from a blower (not shown) installed outside the tank.
  • an advection port 401 through which the water W to be treated is advected is formed at one end in the width direction of the bottom surface of the carrier flowing portion 40 .
  • the confluence port 401 is provided in an approximately half region in the width direction of the bottom surface of the carrier flowing portion 40 .
  • the air diffuser 43 is arranged below the flow port 401 and is configured to supply the air bubbles B to the carrier flow section 40 via the flow port 401 .
  • the filter medium filling part 41 is provided between the advection port 401 of the carrier flowing part 40 and the air diffuser pipe 43, and allows the air bubbles B emitted from the air diffuser pipe 43 to pass through and to be finer. It is configured.
  • the filter medium filling part 41 includes a filter medium 410 for filtering the water W to be treated and a pressing member 412 that presses the filter medium 410 from above.
  • the pressing member 412 is made of a mesh-like member, and is configured so that the water to be treated W, air bubbles B, sludge, etc. can pass through.
  • the filter medium filling portion 41 in this embodiment is supported by the diffuser pipe 43 . It should be noted that, if necessary, a configuration may be adopted in which the filter medium filling portion 41 is supported by using some kind of receiving member through which the water to be treated W, air bubbles B, sludge, etc. can pass.
  • a constituent material of the filter medium 410 is, for example, a loofah-like filter medium.
  • the shape of the filter medium 410 is, for example, cylindrical with a diameter of approximately 50 mm to 150 mm.
  • the filter layer of the filter medium filling portion 41 is configured by filling a plurality of cylindrical filter media 410 in layers.
  • a configuration in which a plurality of cylindrical filter media 410 are integrated is shown, but a configuration in which a plurality of single cylindrical filter media 410 are filled may be employed.
  • the overall height (thickness) of the filter medium filled portion 41 is about 200 mm to 300 mm so that the bubbles B can be efficiently made finer.
  • the ratio of the carrier flowing portion 40 in the carrier fluidizing tank 4 to the other aeration/diffusion portions is 75 to 85% for the carrier flowing portion 40,
  • the diffusion diffusion part becomes 15 to 25%.
  • the filter medium filling part 41 is provided so as to cover the entire advection port 401 .
  • the filter medium filling portion 41 is provided so as to have an area substantially equal to the opening area of the advection port 401 .
  • the air bubbles B are released from the diffuser tube 43 , the air bubbles B are made finer when passing through the filter medium filling section 41 and supplied to the carrier flow section 40 .
  • the group of fine bubbles B causes an upward flow on the side of the tank side wall on the side of the confluence port 401 and a downward flow on the side of the tank side wall opposite to the side of the confluence port 401 .
  • the fluid carrier 400 swirls in the carrier fluidizing section 40, and at this time, the microorganisms adhering to the fluidic carrier 400 cause aerobic decomposition of organic matter and nitrification reaction of ammonia nitrogen in the carrier flowing section 40.
  • the water to be treated W treated in the carrier flow section 40 is filtered when passing through the filter medium filling section 41 to capture sludge, suspended solids (SS), etc., and moves to the sedimentation section 42 .
  • the sedimentation portion 42 is desirably arranged on the same plane as the filter medium filling portion 41 .
  • a partition wall 402 is provided between the carrier flow section 40 and the sedimentation section 42 so that the water to be treated W cannot come and go.
  • the water to be treated W that has migrated to the sedimentation section 42 of the carrier fluidizing tank 4 flows into the treated water tank 5 via the advection section provided below the partition wall separating the carrier fluidizing tank 4 and the treated water tank 5 .
  • the treated water tank 5 temporarily stores the water to be treated W that has been treated in the carrier fluidizing tank 4, and separates the separated sludge that could not be captured by the carrier fluidizing tank 4 to prevent the sludge from flowing out.
  • the treated water tank 5 is provided with an air lift pump (not shown) for circulation, and part of the separated sludge separated into solid and liquid in the treated water tank 5 and the stored water W to be treated is used as circulating water, It is constantly transferred to the solid-liquid separation tank 2 through the circulation return pipe. Air is supplied to the air lift pump from a blower (not shown) installed outside the tank.
  • the water to be treated W that has been treated in the treatment tank 5 passes through the advection section provided in the upper part of the partition wall separating the treatment tank 5 and the disinfection tank 6, and overflows into the disinfection device (not shown) of the disinfection tank 6. flow.
  • the water to be treated W that has been disinfected by coming into contact with the disinfectant in the disinfecting device is discharged from the discharge unit 8 to the outside of the tank.
  • the advection port 401 through which the water to be treated W is advected is formed at one end portion in the width direction of the bottom surface of the carrier flowing portion 40.
  • the present invention is not limited to this configuration.
  • the confluence port 401 may be formed substantially in the widthwise center of the bottom surface of the carrier flowing portion 40 .
  • the filter medium filling portion 41 and the air diffusion pipe 43 are also arranged substantially in the center in the width direction in accordance with the position of the advection port 401, and when the air bubbles B are released from the air diffusion pipe 43, An upward flow is generated, and a downward flow is generated on both sides in the width direction of the tank side wall, thereby forming two swirling flows.
  • the fluid carrier 400 more efficiently swirls in the carrier fluidizing section 40, so that the contact between the fluid carrier 400 and the dissolved oxygen is further promoted, and the organic matter generated by the action of the microorganisms attached to the fluid carrier 400 is removed. aerobic decomposition and nitrification reaction of ammonium nitrogen are carried out more efficiently.
  • the pressing member 412 is provided only at the advection port 401 of the carrier fluidizing tank 4, and the partition wall 402 is provided at the portion other than the advection port 401 (upper portion of the sedimentation portion 42) in plan view.
  • the partition wall 402 is provided at the portion other than the advection port 401 (upper portion of the sedimentation portion 42) in plan view.
  • no partition is provided in a portion other than the advection port 401 in a plan view, and a partition 402 is provided in the vertical direction on the side surface of the filter medium filling portion, A configuration in which the sedimentation part 42 is not provided may be adopted.
  • the advection port 401 through which the water to be treated W is advected is formed at one end portion in the width direction or at the approximate center portion in the width direction of the bottom surface of the carrier flowing portion 40, but the configuration is limited to this.
  • a configuration in which the confluence port 401 is formed on substantially the entire bottom surface of the carrier flowing portion 40 may be employed.
  • the opening area of the advection port 401 in the carrier flow section 40 is approximately the maximum. Since it is arranged so as to extend over the carrier flow portion 40 , more oxygen can be supplied to the carrier flow portion 40 .
  • the aerobic decomposition of organic matter and the nitrification reaction of ammonium nitrogen can be further accelerated by the action of microorganisms adhering to the fluid carrier 400 .
  • the air bubbles B are released from the diffuser pipe 43, an upward flow and a downward flow are randomly formed over the entire surface of the tank.
  • the filter medium 410 of the filter medium filling portion 41 has a structure in which a plurality of cylindrical filter mediums are integrated.
  • the shape is not limited as long as it creates an appropriate gap between the filter media and allows the air bubbles to pass through the filtration layer to be finer and diffuse more efficiently. It may have a shape such as a cylindrical shape or a polygonal tube shape.
  • the filter medium filling portion 41 may be formed by laminating a plurality of flat plate filter mediums with appropriate gaps in the height direction, or may be filled with a plurality of spherical or cylindrical filter mediums. Also good.
  • the present invention can be applied not only to small septic tanks, but also to medium and large septic tanks.

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  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
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  • Biological Treatment Of Waste Water (AREA)

Abstract

According to the present invention, the efficiency of treatment is improved using a more compact septic tank while the efficiency of oxygen dissolution in a carrier flow tank is increased. The present invention is provided with: a carrier flow part (40) that contains and holds a plurality of fluidic carriers (400) that can flow together with a water to be treated (W) with microorganisms carried thereon; and a gas diffusion pipe (43) that feeds bubbles B to the carrier flow part (40). An advection opening (401) through which the water to be treated (W) is advected is provided in the bottom surface of the carrier flow part (40). The gas diffusion pipe (43) is disposed below the advection opening (401). The bubbles B are fed to the carrier flow part (40) through the advection opening (401). A filter material-filled part (41) that subdivides the bubbles (B) while allowing the bubbles (B) to pass therethrough, is provided between the advection opening (401) of the carrier flow part (40) and the gas diffusion pipe (43).

Description

担体流動槽及び浄化槽Carrier fluidization tank and septic tank
　本発明は、担体流動槽を備える浄化槽に関する。 The present invention relates to a septic tank equipped with a carrier fluidization tank.
　この種の浄化槽として、例えば特許文献１に示される浄化槽がある。特許文献１に示される浄化槽は、担体に気泡供給する散気部を備えて好気処理する担体流動槽と、担体流動槽の下流側に複数の担体を内部に沈降堆積させた状態で堆積ろ過層を形成してあるろ過槽とを備える。 As this type of septic tank, for example, there is a septic tank shown in Patent Document 1. The septic tank shown in Patent Document 1 includes a carrier fluidizing tank for aerobic treatment with an air diffusion unit that supplies air bubbles to the carrier, and a carrier fluidizing tank downstream of the carrier fluidizing tank in which a plurality of carriers are sedimented and accumulated. and a filter tank formed with layers.
特開２００３－１０８７１号公報Japanese Unexamined Patent Application Publication No. 2003-10871
　従来の浄化槽では、散気管から供給される気泡の気泡径の大きさは、散気管の吐出孔の大きさに依存する。そのため、気泡径を小さくて酸素溶解効率を高めようとするには、散気管の吐出孔をより小さなものにしなければならず、その結果、散気管の目詰まりが生じ易くなるという問題がある。 In conventional septic tanks, the size of the bubble diameter of the air bubbles supplied from the air diffuser depends on the size of the discharge hole of the air diffuser. Therefore, in order to increase the oxygen dissolution efficiency by reducing the bubble diameter, it is necessary to make the discharge hole of the air diffuser smaller, and as a result, there is a problem that the air diffuser is easily clogged.
　また、従来の浄化槽では、担体流動槽の下流側に、汚泥を除去するためのろ過槽を別途設ける必要があり、浄化槽をよりコンパクトな構成として処理効率を向上させるという点において改善する余地が残されている。 In addition, in conventional septic tanks, it is necessary to separately install a filter tank for removing sludge downstream of the carrier fluidization tank, and there is still room for improvement in terms of improving treatment efficiency by making the septic tank more compact. It is
　本発明は上記実情に鑑みてなされたものであって、その目的は、担体流動槽における酸素溶解効率を高めつつ、浄化槽をよりコンパクトな構成として処理効率を向上させることにある。 The present invention has been made in view of the above circumstances, and its purpose is to increase the oxygen dissolution efficiency in the carrier fluidization tank and improve the treatment efficiency by making the septic tank more compact.
　本発明に係る担体流動槽の特徴は、微生物を担持した状態で被処理水と共に流動可能な複数の流動担体を収容保持する担体流動部と、該担体流動部に気泡を供給する散気管とを備え、
　被処理水が移流する移流口が前記担体流動部の底面に設けられており、前記散気管が前記移流口の下方に配置され該移流口を介して前記担体流動部に気泡が供給されるように構成されており、
　前記担体流動部の移流口と前記散気管との間に、ろ材充填部が設けられている点にある。 A feature of the carrier fluidizing tank according to the present invention is that it comprises a carrier fluidizing section that accommodates and holds a plurality of fluidizing carriers that can flow together with the water to be treated while supporting microorganisms, and an air diffuser that supplies air bubbles to the carrier fluidizing section. prepared,
A flow port through which the water to be treated flows is provided on the bottom surface of the carrier flow section, and the air diffusion pipe is arranged below the flow flow section so that air bubbles are supplied to the carrier flow section through the flow flow section. is configured to
The feature is that a filter material filling portion is provided between the advection port of the carrier flowing portion and the air diffusion pipe.
　本構成によれば、担体流動部の移流口と散気管との間にろ材充填部が設けられているため、気泡がろ材充填部において微細化されることによって気泡径が小さくなり酸素溶解効率が向上する。そのため、散気管の気泡の吐出孔をより小さなものに設計する必要がなく、散気管の目詰まりが生じ難い。さらに、散気管から供給される気泡の量（ブロワ風量）を従来よりも低減させることも可能となり、温室効果ガスの排出削減や運転コストの削減にもつながる。 According to this configuration, since the filter medium filling section is provided between the advection port of the carrier flow section and the air diffusion pipe, the air bubbles are made finer in the filter medium filling section, resulting in a smaller bubble diameter and improved oxygen dissolution efficiency. improves. Therefore, it is not necessary to design the air bubble discharge hole of the air diffuser to be smaller, and clogging of the air diffuser is less likely to occur. Furthermore, it is possible to reduce the amount of air bubbles supplied from the air diffuser (blower air volume), leading to a reduction in greenhouse gas emissions and operating costs.
　また、被処理水がろ材充填部を通過する際に、被処理水中に含まれる汚泥等がろ材充填部で捕捉されるため、従来の浄化槽のように、汚泥を除去するためのろ過槽を担体流動槽の下流側に別途設ける必要がなく、浄化槽をよりコンパクトな構成として処理効率を向上させることもできる。 In addition, when the water to be treated passes through the filter media filling portion, sludge and the like contained in the water to be treated is captured by the filter media filling portion. There is no need to provide a separate septic tank on the downstream side of the fluidizing tank, and the treatment efficiency can be improved by making the septic tank more compact.
　本発明においては、前記担体流動部の底面に、被処理水の移流口が設けられており、前記ろ材充填部が前記移流口の全体を覆うように設けられていると好適である。 In the present invention, it is preferable that an advection port for the water to be treated is provided on the bottom surface of the carrier flowing portion, and the filter medium filling portion is provided so as to cover the entire advection port.
　本構成によれば、ろ材充填部が移流口の全体を覆うように設けられているため、担体流動部に供給される気泡の全てが微細化された状態で供給されることとなり、酸素溶解効率がさらに向上する。また、担体流動部で処理された被処理水の全てがろ材充填部を通過するようになるため、被処理水中に含まれる汚泥等がより捕捉され易くなる。 According to this configuration, since the filter material filling portion is provided so as to cover the entire advection port, all the bubbles supplied to the carrier flow portion are supplied in a fine state, and the oxygen dissolution efficiency is is further improved. In addition, since all of the water to be treated that has been treated in the carrier flow section passes through the filter medium filling section, sludge and the like contained in the water to be treated can be captured more easily.
　本発明においては、前記移流口が、前記担体流動部の底面における幅方向の一端部に形成されていると好適である。 In the present invention, it is preferable that the confluence port is formed at one end in the width direction of the bottom surface of the carrier flowing portion.
　本構成によれば、移流口の側の槽側壁側で上昇流が生じて、さらに移流口の側と反対の側の槽側壁側で下降流が生じることになるため、被処理水が担体流動部内の全体を旋回する旋回流が形成される。これにより、流動担体が担体流動部内の全体を旋回流動することになるため、流動担体と溶存酸素との接触が促され、流動担体に付着した微生物の働きによる有機物の好気分解及びアンモニア態窒素の硝化反応が効率的に行われる。 According to this configuration, an upward flow is generated on the side of the tank side wall on the side of the advection port, and a downward flow is generated on the side of the tank side wall opposite to the side of the advection port. A swirling flow is formed that swirls the entire inside of the part. As a result, the fluidized carrier swirls throughout the carrier fluidized portion, which promotes contact between the fluidized carrier and dissolved oxygen, and aerobic decomposition of organic matter and ammonium nitrogen by the action of microorganisms adhering to the fluidized carrier. of the nitrification reaction is carried out efficiently.
　本発明においては、前記移流口が、前記担体流動部の底面における幅方向の中央部に形成されていると好適である。 In the present invention, it is preferable that the confluence port is formed in the widthwise central portion of the bottom surface of the carrier flowing portion.
　本構成によれば、散気管から気泡が放出されると、槽中央で上昇流が生じて、槽側壁の幅方向両側で下降流が生じることになり、２つの旋回流が形成される。これにより流動担体は、担体流動部内をより効率的に旋回流動することになるため、流動担体と溶存酸素との接触がさらに促され、流動担体に付着した微生物の働きによる有機物の好気分解及びアンモニア態窒素の硝化反応がより効率的に行われる。 According to this configuration, when air bubbles are released from the air diffusion pipe, an upward flow is generated in the center of the tank, and a downward flow is generated on both sides of the side wall of the tank in the width direction, forming two swirling flows. As a result, the fluidized carrier more efficiently swirls in the carrier fluidized portion, so that contact between the fluidized carrier and the dissolved oxygen is further promoted, and aerobic decomposition and Nitrification reaction of ammonium nitrogen is performed more efficiently.
　本発明においては、前記移流口が、前記担体流動部の底面における略全面に形成されていると好適である。 In the present invention, it is preferable that the confluence port is formed on substantially the entire bottom surface of the carrier flowing portion.
　本構成によれば、担体流動部における移流口の開口面積が略最大となり、より多くの酸素を担体流動部に供給することができる。その結果、流動担体に付着した微生物の働きによる有機物の好気分解及びアンモニア態窒素の硝化反応をさらに促進させることができる。 According to this configuration, the opening area of the advection port in the carrier flow section is substantially maximized, and more oxygen can be supplied to the carrier flow section. As a result, the aerobic decomposition of organic matter and the nitrification reaction of ammonium nitrogen can be further accelerated by the action of microorganisms adhering to the fluid carrier.
　本発明においては、前記ろ材充填部において、ろ材が複数積層されていると好適である。 In the present invention, it is preferable that a plurality of filter media are stacked in the filter media filling portion.
　本構成によれば、ろ材充填部のろ過層を、ろ材が複数積層して充填された構成することによって、ろ材の間に適度な隙間が生じるため、気泡のろ過層の通過において微細化と拡散がより効率的に行われる。また、取り扱いも容易であり、使用数を変えることで、ろ材充填部の大きさ（厚み、面積など）を変更することができる。 According to this configuration, since the filter layer of the filter medium filling portion is filled with a plurality of stacked filter materials, an appropriate gap is generated between the filter materials, so that bubbles are miniaturized and diffused when passing through the filter layer. is done more efficiently. In addition, it is easy to handle, and the size (thickness, area, etc.) of the filter medium filled portion can be changed by changing the number used.
　本発明においては、前記ろ材充填部の下流側に沈殿部を備えると好適である。 In the present invention, it is preferable to provide a sedimentation section on the downstream side of the filter medium filling section.
　本構成によれば、ろ材充填部で捕捉できなかった剥離汚泥等が沈殿部において分離し易くなる。 According to this configuration, the separated sludge and the like that could not be captured in the filter filling section are easily separated in the sedimentation section.
　本発明においては、前記沈殿部は、前記ろ材充填部と同一平面上に配置されていると好適である。 In the present invention, it is preferable that the sedimentation section is arranged on the same plane as the filter medium filling section.
　本構成によれば、前記担体流動槽の下部の空間に前記沈殿部を設けることができ、別途沈殿槽を設ける必要がなく、浄化槽をよりコンパクトな構成とすることができる。 According to this configuration, the sedimentation section can be provided in the space below the carrier fluidization tank, and there is no need to provide a sedimentation tank separately, and the septic tank can be made more compact.
浄化槽の概略的な平面図である。It is a schematic plan view of a septic tank. 浄化槽の概略的な平面図である。It is a schematic plan view of a septic tank. 浄化槽の概略的な平面図である。It is a schematic plan view of a septic tank. 担体流動槽の概略的な縦断側面図である。FIG. 2 is a schematic vertical cross-sectional side view of a carrier fluidizing tank; 別実施形態に係る担体流動槽の概略的な縦断側面図である。FIG. 11 is a schematic vertical cross-sectional side view of a carrier fluidizing tank according to another embodiment; 別実施形態に係る担体流動槽の概略的な縦断側面図である。FIG. 11 is a schematic vertical cross-sectional side view of a carrier fluidizing tank according to another embodiment; 別実施形態に係る担体流動槽の概略的な縦断側面図である。FIG. 11 is a schematic vertical cross-sectional side view of a carrier fluidizing tank according to another embodiment;
　以下、図面に基づいて、本発明に係る浄化槽の実施形態を説明する。
　図１～図３に示すように、本実施形態に係る浄化槽１の本体内部には、固液分離槽２、嫌気ろ床槽３、担体流動槽４、処理水槽５、及び消毒槽６が備えられている。尚、本実施形態においては、浄化槽１の長手方向というときは、浄化槽１における固液分離槽２、嫌気ろ床槽３、及び担体流動槽４が並ぶ方向を指し、浄化槽１の幅方向とは、平面視において長手方向と直交する方向を指すものとする。 BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a septic tank according to the present invention will be described below based on the drawings.
As shown in FIGS. 1 to 3, a solid-liquid separation tank 2, an anaerobic filter bed tank 3, a carrier fluidization tank 4, a treatment tank 5, and a disinfection tank 6 are provided inside the main body of the septic tank 1 according to the present embodiment. It is In this embodiment, the longitudinal direction of the septic tank 1 refers to the direction in which the solid-liquid separation tank 2, the anaerobic filter bed tank 3, and the carrier fluidizing tank 4 are arranged in the septic tank 1, and the width direction of the septic tank 1. , a direction orthogonal to the longitudinal direction in plan view.
　被処理水Ｗの原水は、流入部７から固液分離槽２に流入し、嫌気ろ床槽３、担体流動槽４、処理水槽５、消毒槽６の順に移送され、各槽において処理が施された後、放流部８から槽外に放流される。 The raw water to be treated W flows into the solid-liquid separation tank 2 from the inflow part 7, is transferred to the anaerobic filter bed tank 3, the carrier fluidization tank 4, the treatment tank 5, and the disinfection tank 6 in this order, and is treated in each tank. After that, the water is discharged from the discharge unit 8 to the outside of the tank.
　固液分離槽２は、流入部７から流入した被処理水Ｗを受けて一時貯留するように構成されている。固液分離槽２によって、被処理水Ｗ中に含まれる比較的大きな夾雑物、固形物、油脂等が重力沈降により分離されて、槽上部にスカム等の浮遊性の懸濁物質が貯留されると共に、槽底部に汚泥が貯留される。 The solid-liquid separation tank 2 is configured to receive and temporarily store the water to be treated W that has flowed in from the inflow part 7 . In the solid-liquid separation tank 2, relatively large contaminants, solids, oils and fats, etc. contained in the water W to be treated are separated by gravity sedimentation, and floating suspended matter such as scum is stored in the upper part of the tank. At the same time, sludge is stored at the bottom of the tank.
　嫌気ろ床槽３は、嫌気ろ材３１０を備えており、被処理水Ｗが嫌気ろ材３１０を通過する際に、固形物の分離と嫌気性微生物の働きによる有機物の分解、及び硝酸性・亜硝酸性窒素の脱窒が実施される。 The anaerobic filter bed tank 3 is equipped with an anaerobic filter medium 310, and when the water to be treated W passes through the anaerobic filter medium 310, solid matter is separated, organic matter is decomposed by the action of anaerobic microorganisms, and nitrate/nitrite Nitrogen denitrification is carried out.
　本実施形態における担体流動槽４は、担体流動部４０、ろ材充填部４１、沈殿部４２、及び散気管４３を備える。 The carrier fluidizing tank 4 in this embodiment includes a carrier fluidizing section 40 , a filter medium filling section 41 , a sedimentation section 42 and an air diffuser 43 .
　担体流動部４０は、微生物を担持した状態で被処理水Ｗと共に流動可能な複数の流動担体４００を収容保持する。流動担体４００の一例としては、例えば、比重約１．０１、大きさ２０ｍｍ×２０ｍｍの角形スポンジ状担体が挙げられる。また流動担体４００の素材としては、例えばポリウレタン（ＰＵ）が挙げられる。尚、流動担体４００の形状、大きさ、素材については上記構成に限定されるものではなく、耐久性や処理性能が同等以上と判断され得るような構成であればどのような構成であっても良い。 The carrier fluidizing section 40 accommodates and holds a plurality of fluidizing carriers 400 that can flow together with the water W to be treated while carrying microorganisms. An example of the fluid carrier 400 is a rectangular sponge-like carrier having a specific gravity of about 1.01 and a size of 20 mm×20 mm. Further, examples of materials for the fluid carrier 400 include polyurethane (PU). The shape, size, and material of the fluid carrier 400 are not limited to the above configurations, and any configuration can be used as long as the durability and processing performance can be judged to be equal or higher. good.
　散気管４３は、担体流動槽４の槽底部の近傍に設けられており、槽外に設置された図示しないブロワからの空気供給により、散気管４３から気泡Ｂが放出されるように構成されている。 The air diffuser 43 is provided near the bottom of the carrier fluidizing tank 4, and is configured such that air bubbles B are discharged from the air diffuser 43 by air supply from a blower (not shown) installed outside the tank. there is
　本実施形態においては、担体流動部４０の底面における幅方向の一端部に、被処理水Ｗが移流する移流口４０１が形成されている。尚、図４に示すように、移流口４０１は、担体流動部４０の底面における幅方向におけるおよそ半分の領域に設けることが望ましい。散気管４３は、移流口４０１の下方に配置されており、移流口４０１を介して担体流動部４０に気泡Ｂが供給されるように構成されている。 In this embodiment, an advection port 401 through which the water W to be treated is advected is formed at one end in the width direction of the bottom surface of the carrier flowing portion 40 . In addition, as shown in FIG. 4, it is desirable that the confluence port 401 is provided in an approximately half region in the width direction of the bottom surface of the carrier flowing portion 40 . The air diffuser 43 is arranged below the flow port 401 and is configured to supply the air bubbles B to the carrier flow section 40 via the flow port 401 .
　ろ材充填部４１は、担体流動部４０の移流口４０１と散気管４３との間に設けられており、散気管４３から放出される気泡Ｂを通過させつつこれを微細化することができるように構成されている。 The filter medium filling part 41 is provided between the advection port 401 of the carrier flowing part 40 and the air diffuser pipe 43, and allows the air bubbles B emitted from the air diffuser pipe 43 to pass through and to be finer. It is configured.
　ろ材充填部４１は、被処理水Ｗをろ過するためのろ材４１０、及びろ材４１０を上から押さえる押さえ部材４１２を備える。押さえ部材４１２は編み目状の部材で構成されており、被処理水Ｗ、気泡Ｂ、汚泥などが通過可能に構成されている。 The filter medium filling part 41 includes a filter medium 410 for filtering the water W to be treated and a pressing member 412 that presses the filter medium 410 from above. The pressing member 412 is made of a mesh-like member, and is configured so that the water to be treated W, air bubbles B, sludge, etc. can pass through.
　本実施形態におけるろ材充填部４１は、散気管４３によって支持されている。尚、必要に応じて、被処理水Ｗ、気泡Ｂ、汚泥などが通過可能な何らかの受け部材を使用してろ材充填部４１を支持するような構成としても良い。 The filter medium filling portion 41 in this embodiment is supported by the diffuser pipe 43 . It should be noted that, if necessary, a configuration may be adopted in which the filter medium filling portion 41 is supported by using some kind of receiving member through which the water to be treated W, air bubbles B, sludge, etc. can pass.
　ろ材４１０の構成素材としては、例えば、ヘチマ状ろ材が挙げられる。また、ろ材４１０の形状としては、例えば、直径およそ５０ｍｍ～１５０ｍｍの円筒状のものが挙げられる。 A constituent material of the filter medium 410 is, for example, a loofah-like filter medium. The shape of the filter medium 410 is, for example, cylindrical with a diameter of approximately 50 mm to 150 mm.
　本実施形態におけるろ材充填部４１においては、ろ材充填部４１のろ過層が、複数の円筒状のろ材４１０が積層して充填されて構成されている。尚、本実施形態においては、複数の円筒状のろ材４１０が一体化されている形態が示されているが、円筒状のろ材４１０の単体が複数充填されている構成としても良い。また、ろ材充填部４１の全体の高さ（厚み）は、気泡Ｂが効率的に微細化されるように、およそ２００ｍｍ～３００ｍｍとすることが望ましい。これにより、担体流動槽４における担体流動部４０とそれ以外の散気拡散部（ろ材充填部４１＋散気管４３用のスペース＋沈殿部４２）の比率は、担体流動部４０が７５～８５％、散気拡散部が１５～２５％となる。 In the filter medium filling portion 41 of the present embodiment, the filter layer of the filter medium filling portion 41 is configured by filling a plurality of cylindrical filter media 410 in layers. In this embodiment, a configuration in which a plurality of cylindrical filter media 410 are integrated is shown, but a configuration in which a plurality of single cylindrical filter media 410 are filled may be employed. In addition, it is desirable that the overall height (thickness) of the filter medium filled portion 41 is about 200 mm to 300 mm so that the bubbles B can be efficiently made finer. As a result, the ratio of the carrier flowing portion 40 in the carrier fluidizing tank 4 to the other aeration/diffusion portions (the filter filling portion 41 + the space for the air diffuser pipe 43 + the sedimentation portion 42) is 75 to 85% for the carrier flowing portion 40, The diffusion diffusion part becomes 15 to 25%.
　本実施形態では、ろ材充填部４１が移流口４０１の全体を覆うように設けられている。尚、図４に示すように、ろ材充填部４１は、移流口４０１の開口面積とほぼ同じ面積を有するように設けられていることが望ましい。 In this embodiment, the filter medium filling part 41 is provided so as to cover the entire advection port 401 . In addition, as shown in FIG. 4 , it is desirable that the filter medium filling portion 41 is provided so as to have an area substantially equal to the opening area of the advection port 401 .
　散気管４３から気泡Ｂが放出されると、気泡Ｂは、ろ材充填部４１を通過する際に微細化されて、担体流動部４０に供給される。 When the air bubbles B are released from the diffuser tube 43 , the air bubbles B are made finer when passing through the filter medium filling section 41 and supplied to the carrier flow section 40 .
　本実施形態では、微細化された気泡Ｂ群によって、移流口４０１の側の槽側壁側で上昇流が生じ、移流口４０１の側と反対の側の槽側壁側で下降流が生じる。これにより流動担体４００が担体流動部４０内を旋回流動し、このとき担体流動部４０では、流動担体４００に付着した微生物の働きによって有機物の好気分解及びアンモニア態窒素の硝化反応が行われる。 In this embodiment, the group of fine bubbles B causes an upward flow on the side of the tank side wall on the side of the confluence port 401 and a downward flow on the side of the tank side wall opposite to the side of the confluence port 401 . As a result, the fluid carrier 400 swirls in the carrier fluidizing section 40, and at this time, the microorganisms adhering to the fluidic carrier 400 cause aerobic decomposition of organic matter and nitrification reaction of ammonia nitrogen in the carrier flowing section 40.
　担体流動部４０で処理された被処理水Ｗは、ろ材充填部４１を通過する際にろ過されて、汚泥や浮遊物質（ＳＳ）等が捕捉され、沈殿部４２へと移行する。沈殿部４２は、ろ材充填部４１と同一平面上に配置されていることが望ましい。尚、担体流動部４０と沈殿部４２との間には隔壁４０２が設けられており、被処理水Ｗの行き来ができないように構成されている。 The water to be treated W treated in the carrier flow section 40 is filtered when passing through the filter medium filling section 41 to capture sludge, suspended solids (SS), etc., and moves to the sedimentation section 42 . The sedimentation portion 42 is desirably arranged on the same plane as the filter medium filling portion 41 . A partition wall 402 is provided between the carrier flow section 40 and the sedimentation section 42 so that the water to be treated W cannot come and go.
　担体流動槽４の沈殿部４２に移行した被処理水Ｗは、担体流動槽４と処理水槽５とを仕切る隔壁の下部に設けられている移流部を介して、処理水槽５に流れる。 The water to be treated W that has migrated to the sedimentation section 42 of the carrier fluidizing tank 4 flows into the treated water tank 5 via the advection section provided below the partition wall separating the carrier fluidizing tank 4 and the treated water tank 5 .
　処理水槽５は、担体流動槽４で処理された被処理水Ｗを一時的に貯留すると共に、担体流動槽４で捕捉できなかった剥離汚泥等を分離し、汚泥の流出を防止する。 The treated water tank 5 temporarily stores the water to be treated W that has been treated in the carrier fluidizing tank 4, and separates the separated sludge that could not be captured by the carrier fluidizing tank 4 to prevent the sludge from flowing out.
　また処理水槽５には、循環用のエアリフトポンプ（図示せず）が設けられており、処理水槽５で固液分離された剥離汚泥及び貯留された被処理水Ｗの一部が循環水として、循環返送管を介して固液分離槽２に常時移送される。尚、エアリフトポンプには、槽外に設置された図示しないブロワから空気が供給される。 In addition, the treated water tank 5 is provided with an air lift pump (not shown) for circulation, and part of the separated sludge separated into solid and liquid in the treated water tank 5 and the stored water W to be treated is used as circulating water, It is constantly transferred to the solid-liquid separation tank 2 through the circulation return pipe. Air is supplied to the air lift pump from a blower (not shown) installed outside the tank.
　処理水槽５で処理された被処理水Ｗは、処理水槽５と消毒槽６とを仕切る隔壁の上部に設けられている移流部を通ってオーバーフローにより消毒槽６の消毒装置（図示せず）に流れる。消毒装置で消毒剤と接触して消毒された被処理水Ｗは、放流部８から槽外方に放流される。 The water to be treated W that has been treated in the treatment tank 5 passes through the advection section provided in the upper part of the partition wall separating the treatment tank 5 and the disinfection tank 6, and overflows into the disinfection device (not shown) of the disinfection tank 6. flow. The water to be treated W that has been disinfected by coming into contact with the disinfectant in the disinfecting device is discharged from the discharge unit 8 to the outside of the tank.
〔別実施形態〕
　１．上述の実施形態では、担体流動部４０の底面における幅方向の一端部に、被処理水Ｗが移流する移流口４０１が形成されているが、この構成に限定されるものではなく、他にも例えば、図５に示すように、移流口４０１が、担体流動部４０の底面における幅方向の略中央部に形成されている構成としても良い。この実施形態では、移流口４０１の位置に合わせて、ろ材充填部４１と散気管４３も幅方向の略中央部に配置されており、散気管４３から気泡Ｂが放出されると、槽中央で上昇流が生じて、槽側壁の幅方向両側で下降流が生じることになり、２つの旋回流が形成される。これにより流動担体４００は、担体流動部４０内をより効率的に旋回流動することになるため、流動担体４００と溶存酸素との接触がさらに促され、流動担体４００に付着した微生物の働きによる有機物の好気分解及びアンモニア態窒素の硝化反応がより効率的に行われる。 [Another embodiment]
1. In the above-described embodiment, the advection port 401 through which the water to be treated W is advected is formed at one end portion in the width direction of the bottom surface of the carrier flowing portion 40. However, the present invention is not limited to this configuration. For example, as shown in FIG. 5, the confluence port 401 may be formed substantially in the widthwise center of the bottom surface of the carrier flowing portion 40 . In this embodiment, the filter medium filling portion 41 and the air diffusion pipe 43 are also arranged substantially in the center in the width direction in accordance with the position of the advection port 401, and when the air bubbles B are released from the air diffusion pipe 43, An upward flow is generated, and a downward flow is generated on both sides in the width direction of the tank side wall, thereby forming two swirling flows. As a result, the fluid carrier 400 more efficiently swirls in the carrier fluidizing section 40, so that the contact between the fluid carrier 400 and the dissolved oxygen is further promoted, and the organic matter generated by the action of the microorganisms attached to the fluid carrier 400 is removed. aerobic decomposition and nitrification reaction of ammonium nitrogen are carried out more efficiently.
　２．上述の実施形態では、担体流動槽４の移流口４０１にのみ押さえ部材４１２を設け、平面視で移流口４０１以外部の部分（沈殿部４２の上部）には隔壁４０２を設けているが、この構成に限定されるものではなく、他にも例えば、図６に示すように、平面視において移流口４０１以外の部分に隔壁を設けず、ろ材充填部の側面の上下方向に隔壁４０２を設け、沈殿部４２を設けない構成としても良い。 2. In the above-described embodiment, the pressing member 412 is provided only at the advection port 401 of the carrier fluidizing tank 4, and the partition wall 402 is provided at the portion other than the advection port 401 (upper portion of the sedimentation portion 42) in plan view. In addition, as shown in FIG. 6, for example, no partition is provided in a portion other than the advection port 401 in a plan view, and a partition 402 is provided in the vertical direction on the side surface of the filter medium filling portion, A configuration in which the sedimentation part 42 is not provided may be adopted.
　３．上述の実施形態では、担体流動部４０の底面における幅方向の一端部や幅方向の略中央部に、被処理水Ｗが移流する移流口４０１が形成されているが、この構成に限定されるものではなく、他にも例えば、図７に示すように、移流口４０１が、担体流動部４０の底面における略全面に形成されている構成としても良い。この実施形態では、担体流動部４０における移流口４０１の開口面積が略最大となっており、移流口４０１に合わせて、ろ材充填部４１と散気管４３もまた担体流動部４０の底面の略全面にわたるように配置されているため、より多くの酸素を担体流動部４０に供給することができる。これにより、流動担体４００に付着した微生物の働きによる有機物の好気分解及びアンモニア態窒素の硝化反応をさらに促進させることができる。尚、この実施形態では、散気管４３から気泡Ｂが放出されると、槽全面で上昇流と下降流がランダムに形成される。 3. In the above-described embodiment, the advection port 401 through which the water to be treated W is advected is formed at one end portion in the width direction or at the approximate center portion in the width direction of the bottom surface of the carrier flowing portion 40, but the configuration is limited to this. Alternatively, for example, as shown in FIG. 7, a configuration in which the confluence port 401 is formed on substantially the entire bottom surface of the carrier flowing portion 40 may be employed. In this embodiment, the opening area of the advection port 401 in the carrier flow section 40 is approximately the maximum. Since it is arranged so as to extend over the carrier flow portion 40 , more oxygen can be supplied to the carrier flow portion 40 . As a result, the aerobic decomposition of organic matter and the nitrification reaction of ammonium nitrogen can be further accelerated by the action of microorganisms adhering to the fluid carrier 400 . In this embodiment, when the air bubbles B are released from the diffuser pipe 43, an upward flow and a downward flow are randomly formed over the entire surface of the tank.
　４．上述の実施形態では、ろ材充填部４１のろ材４１０が、複数の円筒状のろ材が一体化されている構成であるが、この構成に限定されるものではなく、ろ材を複数積層することによって、ろ材の間に適度な隙間が生じさせ、気泡のろ過層の通過において微細化と拡散がより効率的に行われるものであれば、その形状に限定されるものではなく、他にも例えば、三角円筒状や多角形筒状などの形状であっても良い。また、ろ材充填部４１が、平板のろ材を高さ方向に適度な隙間を生じさせて複数積層させて配置したものであっても良く、球状や円筒状のろ材を複数充填したものであっても良い。 4. In the above-described embodiment, the filter medium 410 of the filter medium filling portion 41 has a structure in which a plurality of cylindrical filter mediums are integrated. The shape is not limited as long as it creates an appropriate gap between the filter media and allows the air bubbles to pass through the filtration layer to be finer and diffuse more efficiently. It may have a shape such as a cylindrical shape or a polygonal tube shape. In addition, the filter medium filling portion 41 may be formed by laminating a plurality of flat plate filter mediums with appropriate gaps in the height direction, or may be filled with a plurality of spherical or cylindrical filter mediums. Also good.
　本発明は、小型の浄化槽だけでなく、中型及び大型の浄化槽にも適用することができる。 The present invention can be applied not only to small septic tanks, but also to medium and large septic tanks.
１　浄化槽
２　固液分離槽
３　嫌気ろ床槽
３１０　嫌気ろ材
４　担体流動槽
４０　担体流動部
４００　流動担体
４０１　移流口
４０２　隔壁
４１　ろ材充填部
４１０　ろ材
４１２　押さえ部材
４２　沈殿部
４３　散気管
５　処理水槽
６　消毒槽
７　流入部
８　放流部
Ｗ　被処理水
Ｂ　気泡 1 Septic tank 2 Solid-liquid separation tank 3 Anaerobic filter bed tank 310 Anaerobic filter medium 4 Carrier fluidizing tank 40 Carrier flowing part 400 Fluidized carrier 401 Advection port 402 Partition wall 41 Filter medium filling part 410 Filter medium 412 Pressing member 42 Sedimentation part 43 Air diffuser 5 Treated water tank 6 Disinfection tank 7 Inflow part 8 Discharge part W Water to be treated B Bubbles

Claims (9)

  1. 　微生物を担持した状態で被処理水と共に流動可能な複数の流動担体を収容保持する担体流動部と、該担体流動部に気泡を供給する散気管とを備え、
    　被処理水が移流する移流口が前記担体流動部の底面に設けられており、前記散気管が前記移流口の下方に配置されて該移流口を介して前記担体流動部に気泡が供給されるように構成されており、
    　前記担体流動部の移流口と前記散気管との間に、ろ材充填部が設けられている担体流動槽。     A carrier fluidizing section for accommodating and holding a plurality of fluidizing carriers capable of flowing together with the water to be treated while supporting microorganisms, and an air diffuser for supplying bubbles to the carrier fluidizing section,
    An advection port through which the water to be treated is advected is provided on the bottom surface of the carrier flow section, and the air diffusion pipe is disposed below the advection port to supply air bubbles to the carrier flow section through the advection port. is configured as
    A carrier fluidizing tank, wherein a filter material filling portion is provided between the advection port of the carrier fluidizing portion and the air diffusion pipe.
  2. 　前記ろ材充填部が前記移流口の全体を覆うように設けられている請求項１に記載の担体流動槽。 The carrier fluidizing tank according to claim 1, wherein the filter medium filling part is provided so as to cover the entire advection port.
  3. 　前記移流口が、前記担体流動部の底面における幅方向の一端部に形成されている請求項１又は２に記載の担体流動槽。 The carrier fluidizing tank according to claim 1 or 2, wherein the confluence port is formed at one end in the width direction of the bottom surface of the carrier fluidizing portion.
  4. 　前記移流口が、前記担体流動部の底面における幅方向の中央部に形成されている請求項１又は２に記載の担体流動槽。 The carrier fluidizing tank according to claim 1 or 2, wherein the confluence port is formed in the widthwise central portion of the bottom surface of the carrier fluidizing portion.
  5. 　前記移流口が、前記担体流動部の底面における略全面に形成されている請求項１又は２に記載の担体流動槽。 The carrier fluidizing tank according to claim 1 or 2, wherein the convection port is formed on substantially the entire bottom surface of the carrier fluidizing portion.
  6. 　前記ろ材充填部において、ろ材が複数積層されている請求項１又は２に記載の担体流動槽。 The carrier fluidization tank according to claim 1 or 2, wherein a plurality of filter media are stacked in the filter media filling portion.
  7. 　前記ろ材充填部の下流側に沈殿部を備える請求項１又は２に記載の担体流動槽。 The carrier fluidization tank according to claim 1 or 2, comprising a sedimentation section on the downstream side of the filter medium filling section.
  8. 　前記沈殿部は、前記ろ材充填部と同一平面上に配置されている請求項７に記載の担体流動槽。 The carrier fluidization tank according to claim 7, wherein the sedimentation section is arranged on the same plane as the filter medium filling section.
  9. 　請求項１又は２に記載の担体流動槽を備える浄化槽。 A septic tank comprising the carrier fluidization tank according to claim 1 or 2.
PCT/JP2022/043138 2021-12-17 2022-11-22 Carrier flow tank and septic tank WO2023112615A1 (en)

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JP2021-205399 2021-12-17

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002096090A (en) * 2000-09-25 2002-04-02 Kubota Corp Septic tank
JP2005342652A (en) * 2004-06-04 2005-12-15 Fuji Clean Kogyo Kk Water treatment apparatus
JP2015039669A (en) * 2013-08-22 2015-03-02 株式会社ハウステック Mobile wastewater treatment system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002096090A (en) * 2000-09-25 2002-04-02 Kubota Corp Septic tank
JP2005342652A (en) * 2004-06-04 2005-12-15 Fuji Clean Kogyo Kk Water treatment apparatus
JP2015039669A (en) * 2013-08-22 2015-03-02 株式会社ハウステック Mobile wastewater treatment system

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