WO2018229912A1 - Waste water treatment device - Google Patents

Waste water treatment device Download PDF

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Publication number
WO2018229912A1
WO2018229912A1 PCT/JP2017/022007 JP2017022007W WO2018229912A1 WO 2018229912 A1 WO2018229912 A1 WO 2018229912A1 JP 2017022007 W JP2017022007 W JP 2017022007W WO 2018229912 A1 WO2018229912 A1 WO 2018229912A1
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WO
WIPO (PCT)
Prior art keywords
sewage
treatment tank
sludge
ejection
tank
Prior art date
Application number
PCT/JP2017/022007
Other languages
French (fr)
Japanese (ja)
Inventor
須賀　雅庸
奥村　修平
直哉 宇和
Original Assignee
新明和工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 新明和工業株式会社 filed Critical 新明和工業株式会社
Priority to PCT/JP2017/022007 priority Critical patent/WO2018229912A1/en
Priority to CN201780091234.3A priority patent/CN110662721A/en
Priority to JP2019524638A priority patent/JP7046941B2/en
Publication of WO2018229912A1 publication Critical patent/WO2018229912A1/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
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
    • 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
    • C02F3/12—Activated sludge processes
    • C02F3/20—Activated sludge processes using diffusers
    • 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 sewage treatment apparatus.
  • a filter medium membrane consisting of a row of contact bodies (string-like filter media) is suspended in a water treatment tank, and sludge is adhered to the filter media membrane so as to perform sludge treatment with microorganisms attached to the filter media membrane.
  • a mixed water treatment bed is known (for example, see Patent Document 1).
  • sewage is jetted from the jet nozzle arranged below the filter medium film toward the filter medium film, and the sewage is diffused upward from below in the water treatment tank. Is done.
  • the present invention has been made in view of such a point, and an object thereof is to suppress clogging of gaps between a plurality of contact bodies due to attached sludge.
  • the present invention is directed to a sewage treatment apparatus that treats sewage containing sludge, and has taken the following solutions.
  • the first invention is a treatment tank in which sewage is stored; A plurality of contact bodies provided in the treatment tank, to which sludge is attached; A sewage ejection part for ejecting sewage toward the contact body in the treatment tank; An air ejection part for ejecting air into the treatment tank; And a flow path restricting part for restricting a flow path of the sewage ejected from the sewage ejecting part.
  • a sewage ejection part that ejects sewage toward the contact body in the treatment tank and an air ejection part that ejects air are provided.
  • the flow of the sewage ejected from the sewage ejection part into the treatment tank is regulated by the flow path regulation part on the way to the contact body.
  • the lump of sludge adhering to the thread-like fixed carrier as a contact body is hardened at the center part entangled with the thread-like fixed carrier, while the outer part not entangled so much with the thread-like fixed carrier is easily peeled off. It has become. Therefore, by applying a driving force to the air bubbles that can peel only the outer part of the sludge mass, the air bubbles collide with the sludge mass, thereby closing the gap between adjacent contact bodies. The outer part of the sludge lump can be dropped.
  • the contact body is composed of a thread-like fixed carrier suspended in the processing tank
  • the air bubbles are propelled to increase the speed of the air bubbles
  • the Karman vortex is generated, resulting in a lot of fluctuations.
  • the entire sewage in the treatment tank shakes, and the swaying of the sewage causes the thread-like fixed carrier to sway. By shaking, it is possible to suppress the growth of sludge that is easily peeled off at the outer portion of the sludge block that closes the sewage flow path.
  • the sewage ejection part and the air ejection part may be composed of separate ejection nozzles, or may be composed of one ejection nozzle that is ejected in a state where sewage and air are mixed.
  • the sewage ejection part is configured to eject sewage upward from the bottom surface side of the treatment tank.
  • the sewage is jetted upward from the bottom side of the treatment tank, so that the propulsive force of the air bubbles toward the contact body is further improved, and it is easy to drop sludge attached to the contact body. Become.
  • the contact body is composed of a thread-like fixed carrier suspended in the treatment tank and the sewage ejection part is arranged at the center position of the bottom surface of the treatment tank, the sewage ejected from the sewage ejection part is Only the lower center part of the contact body, which is easily supplied, grows sludge quickly, and it becomes easy to form a lump of sludge at that portion, and in particular, the sludge flow path is easily blocked.
  • a flow path restriction part is arranged above the sewage ejection part, and the flow rate of sewage ejected from the sewage ejection part is restricted, thereby increasing the flow rate of the sewage in the lower central part of the contact body,
  • the sludge can be peeled off by colliding with the lower center part of the contact body well, and the blockage of the sewage flow path by the sludge lump can be eliminated.
  • the flow path restricting portion is formed of a guide member that is formed in a cylindrical shape extending in the vertical direction and becomes tapered toward the upper side.
  • the flow of sewage can be accelerated only by passing the sewage through a cylindrical guide member that tapers toward the top. Moreover, since the guide member has a tapered shape, sludge flows down along the inclined surface, and accumulation of sludge on the surface of the guide member can be suppressed.
  • the flow path restricting portion is formed of a guide member that is formed in a cylindrical shape extending in the vertical direction and has a contracted flow portion in which a part of the cylinder is narrowed.
  • the flow of sewage can be accelerated only by passing the sewage through a cylindrical guide member having a contracted portion.
  • a fifth invention is the third or fourth invention, wherein
  • the guide member is disposed with a predetermined gap between the outer peripheral surface of the guide member and the inner peripheral surface of the processing tank, and between the lower portion of the guide member and the bottom surface of the processing tank. It is characterized by being.
  • the inside of the guide member is A part of the sewage that has passed circulates through these gaps so as to be sucked again from the lower opening of the guide member.
  • the jet outlet of the sewage jet part protrudes upward from the bottom surface of the treatment tank.
  • the distance from the sewage ejection part to the flow path regulating part can be shortened by projecting the ejection port of the sewage ejection part above the bottom surface of the treatment tank.
  • a seventh invention is the sixth invention, wherein In addition to covering the periphery of the protruding portion of the sewage ejection part, an inclined cover that tapers from the bottom surface of the treatment tank toward the ejection port of the sewage ejection part is provided.
  • the protruding portion of the sewage ejection portion is covered with a tapered inclined cover. This prevents sludge from accumulating at the corners of the protruding portion of the sewage ejection portion and the bottom surface of the treatment tank, and the sewage that has been circulated to the bottom surface side of the treatment tank after being accelerated by the flow path regulating portion, It can guide smoothly toward the spout of a sewage ejection part along the inclined surface of an inclined cover.
  • the eighth invention is a sewage treatment apparatus for treating sewage containing sludge, A treatment tank in which sewage is stored in a cylindrical shape extending in the vertical direction; A plurality of contact bodies provided in the treatment tank, to which sludge is attached; Provided below the contact body, and a sewage ejection part for ejecting sewage into the treatment tank, An air ejection part provided below the contact body and ejecting air into the treatment tank; The sewage ejection part is configured to eject sewage from a side wall of the treatment tank in a direction along the inner peripheral surface of the treatment tank.
  • a sewage ejection part for ejecting sewage into the treatment tank and an air ejection part for ejecting air are provided below the plurality of contact bodies.
  • the sewage ejected from the sewage ejection part flows in a direction along the inner peripheral surface of the treatment tank from the side wall of the treatment tank.
  • the sewage ejected from the sewage ejection section flows upward while swirling along the inner peripheral surface of the treatment tank, so that the air bubbles move upward along the swirl flow.
  • a propulsive force is given and it becomes easy to drop the lump of sludge adhering to a contact body.
  • the sewage ejection part is configured to eject sewage from a side wall of the treatment tank in a direction along the inner peripheral surface of the treatment tank and obliquely upward.
  • the sewage ejected from the sewage ejection part flows in a direction along the inner peripheral surface of the processing tank from the side wall of the processing tank and obliquely upward, the inner periphery of the processing tank The swirl flow that flows while swirling along the surface can be more actively directed upward. Thereby, the propulsive force of air bubbles can be further improved.
  • the tenth invention is a sewage treatment apparatus for treating sewage containing sludge, A treatment tank in which sewage is stored; A plurality of contact bodies provided in the treatment tank, to which sludge is attached; Provided below the contact body, and a sewage ejection part for ejecting sewage into the treatment tank, An air ejection part provided below the contact body and ejecting air into the treatment tank; And a vibrator for vibrating the bottom surface of the treatment tank.
  • an excess sludge block that gives a propulsive force to air bubbles and collides with the lump of sludge adhering to the contact body to block the gap between adjacent contact bodies. Can be dropped.
  • FIG. 1 is a schematic diagram illustrating a sludge treatment system including the sewage treatment apparatus according to the first embodiment.
  • FIG. 2 is a schematic diagram showing the configuration of the sewage treatment apparatus.
  • FIG. 3 is a side sectional view showing the configuration around the ejection nozzle.
  • FIG. 4 is a side sectional view showing a configuration around the ejection nozzle according to the second embodiment.
  • FIG. 5 is a side sectional view showing the configuration around the ejection nozzle according to the third embodiment.
  • FIG. 6 is a plan cross-sectional view showing the configuration around the ejection nozzle according to the fourth embodiment.
  • FIG. 7 is a side sectional view showing the configuration around the ejection nozzle.
  • FIG. 8 is a side cross-sectional view showing the configuration around the ejection nozzle according to the fifth embodiment.
  • FIG. 9 is a side sectional view showing a configuration around the ejection nozzle according to the sixth embodiment.
  • the sludge treatment system 10 includes a sewage receiving tank 11, a primary treatment tank 20, a secondary treatment tank 40, and a membrane treatment water tank 50.
  • the sewage receiving tank 11 stores sewage containing sludge supplied from the outside.
  • An air supply unit 12 is provided at the bottom of the sewage receiving tank 11.
  • An air pump 14 is connected to the air supply unit 12 via an air pipe 13. And while driving the air pump 14 and opening the opening-and-closing valve which is not illustrated, air is supplied in the sewage receiving tank 11 via the air supply part 12.
  • the sewage receiving tank 11 and the primary treatment tank 20 are connected by a first water pipe 15.
  • a sewage pump 16 is connected to the first water pipe 15. Then, by driving the sewage pump 16, sewage in the sewage receiving tank 11 is supplied to a first overflow receiving tank 24 described later of the primary treatment tank 20 through the first water pipe 15.
  • the primary treatment tank 20 is a sewage treatment apparatus that treats sewage containing sludge, and includes a treatment tank 21 in which sewage is stored, a plurality of contacts 22 provided in the treatment tank 21, and sewage in the treatment tank 21. And an ejection nozzle 23 (sewage ejection part, air ejection part) for ejecting air.
  • the contact body 22 is composed of a thread-like fixed carrier capable of capturing sludge.
  • the processing tank 21 is formed in a cylindrical shape extending in the vertical direction, and a first overflow receiving tank 24 and a second overflow receiving tank 27 are provided on the upper end side thereof.
  • the first overflow receiving tank 24 receives sewage overflowing from the upper opening of the processing tank 21. Further, sewage supplied from the first water pipe 15 of the sewage receiving tank 11 also flows into the first overflow receiving tank 24.
  • a circulation pipe 25 is connected to the bottom of the first overflow receiving tank 24.
  • the other end of the circulation pipe 25 is connected to an ejection nozzle 23 attached to the bottom of the processing tank 21.
  • a circulation pump 26 is connected to the circulation pipe 25.
  • An air pump 14 is connected to the downstream side of the circulation pipe 25 from the circulation pump 26 via the air pipe 13.
  • the circulation pump 26 and the air pump 14 are driven, and an open / close valve (not shown) is opened, so that the sewage in the first overflow receiving tank 24 goes to the ejection nozzle 23 via the circulation pipe 25 and the circulation pipe 25.
  • an open / close valve (not shown) is opened, so that the sewage in the first overflow receiving tank 24 goes to the ejection nozzle 23 via the circulation pipe 25 and the circulation pipe 25.
  • sewage and air are mixed.
  • the sewage and air are ejected from the ejection nozzle 23 into the treatment tank 21 in a mixed state.
  • the second overflow receiving tank 27 receives sewage overflowing from the upper opening of the processing tank 21.
  • a second water pipe 28 is connected to the bottom of the second overflow receiving tank 27.
  • the downstream end of the second water pipe 28 is disposed above the secondary treatment tank 40, and the sewage flowing through the second water pipe 28 from the second overflow receiving tank 27 is supplied to the secondary treatment tank 40.
  • the secondary treatment tank 40 is for removing untreated components remaining in the sewage after being treated in the primary treatment tank 20.
  • a plurality of contact bodies 41 to which sludge is attached and an air supply unit 42 disposed below the contact bodies 41 are provided.
  • the air pump 14 is connected to the air supply unit 42 via the air pipe 13. Then, the air pump 14 is driven and an open / close valve (not shown) is opened, whereby air is supplied into the secondary treatment tank 40 via the air supply unit 42.
  • the membrane treatment water tank 50 is installed adjacent to the secondary treatment tank 40 and receives sewage flowing from the lower opening of the secondary treatment tank 40.
  • a plurality of filtration membranes 51 for filtering sewage and an air supply unit 52 disposed below the filtration membrane 51 are provided in the membrane-treated water tank 50.
  • the air pump 14 is connected to the air supply unit 52 via the air pipe 13. And while driving the air pump 14 and opening the on-off valve (not shown), air is supplied into the membrane-treated water tank 50 via the air supply unit 52.
  • a treated water pipe 53 is connected to the filtration membrane 51.
  • a treated water pump 54 is connected to the treated water pipe 53. And the treated water filtered with the filter membrane 51 is drained from the treated water piping 53 by driving the treated water pump 54.
  • a sludge collection pipe 55 for collecting sludge is connected to the bottom of the membrane treatment water tank 50.
  • a sludge pump 56 is connected to the sludge recovery pipe 55. Then, by driving the sludge pump 56, the sludge precipitated at the bottom of the membrane treatment water tank 50 is recovered from the sludge recovery pipe 55.
  • the plurality of contact bodies 22 provided in the treatment tank 21 and the bottom side of the treatment tank 21 are directed upward.
  • An ejection nozzle 23 for ejecting sewage and air is provided.
  • the ejection port of the ejection nozzle 23 projects upward from the bottom surface of the processing tank 21.
  • sewage and air are ejected from the ejection nozzle 23 toward the contact body 22 so that sludge contained in the sewage adheres to the contact body 22.
  • the sludge adhering to the contact body 22 is purified by the effect of the bacteria adhering to the contact body 22.
  • the plurality of contact bodies 22 are made of a thread-like fixed carrier capable of trapping sludge, and are arranged so as to hang down in the vertical direction.
  • the sludge contained in the sewage ejected from the ejection nozzle 23 adheres to the contact body 22 when passing through the gaps between the plurality of contact bodies 22.
  • the flow of sewage ejected from the ejection nozzle 23 is accelerated and the air bubbles are propelled.
  • the air bubbles are caused to collide with the sludge mass attached to the contact body 22.
  • a guide member 30 (flow path regulation) is formed in the processing tank 21 in a cylindrical shape extending in the vertical direction and allows sewage and air ejected from the ejection nozzle 23 to pass therethrough. Part) is disposed.
  • the guide member 30 is a substantially conical umbrella-shaped body having a shape in which an upper portion and a lower portion are opened, and a shape that tapers upward as the upper opening becomes smaller than the lower opening. Is formed.
  • the sewage flow velocity V when the sewage ejected from the ejection port of the ejection nozzle 23 passes through the inside of the guide member 30 is A, the cross-sectional area of the upper opening of the guide member 30 is ejected from the ejection nozzle 23.
  • Q is the flow rate of the sewage.
  • V Q / A (1)
  • the cross-sectional area of the guide member 30 gradually narrows upward, whereas the flow rate Q of sewage is constant. That is, by restricting the flow path of the sewage by the guide member 30 and gradually narrowing the flow path of the sewage, the pressure increases, and the sewage having an ejection speed that can overcome the pressure is ejected from the ejection nozzle 23. For the first time, the sewage ejected from the upper opening of the guide member 30 can be accelerated.
  • the guide member 30 has predetermined gaps D ⁇ b> 1 and D ⁇ b> 2 between the outer peripheral surface of the guide member 30 and the inner peripheral surface of the processing bath 21 and between the lower portion of the guide member 30 and the bottom surface of the processing bath 21. Arranged.
  • the lower part of the guide member 30 overlaps with the ejection port of the ejection nozzle 23 in a side view, so that the sewage and air ejected from the ejection nozzle 23 surely pass through the inside of the guide member 30.
  • the flow of sewage can be accelerated only by passing the sewage through the cylindrical guide member 30 that tapers toward the upper side.
  • the air bubbles ejected together with the sewage from the ejection nozzle 23 ride on the accelerated sewage flow and are given a propulsive force.
  • excessive lump of sludge adhering to the contact body 22 can be obtained by directly colliding the air bubble to which the propulsive force is applied with the contact body 22 or by shaking the contact body 22 by the influence of Karman vortex generated by the air bubble. Can be dropped.
  • the contact body 22 is installed above the opening of the guide member 30 and the ejection nozzle 23 is provided in the lower part of the treatment tank 21, the sewage ejected from the ejection nozzle 23 is directed upward from below.
  • the air bubbles rise due to buoyancy, both the sewage and the air bubbles travel upward. Thereby, the sewage and air bubbles ejected from the ejection nozzle 23 can collide with the contact body 22 vigorously.
  • predetermined gaps D1 and D2 are provided between the outer peripheral surface of the guide member 30 and the inner peripheral surface of the processing tank 21, and between the lower portion of the guide member 30 and the bottom surface of the processing tank 21, and the guide
  • a slightly negative pressure is formed below the opening of the ejection nozzle 23. Therefore, a part of the sewage that has passed through the inside of the guide member 30 circulates through these gaps D1 and D2 so as to be sucked again from the lower opening of the guide member 30.
  • the sludge accumulated on the bottom surface of the treatment tank 21 is rolled up by the circulated sewage, the rolled up sludge is ejected toward the contact body 22, and the sludge is adhered to the contact body 22 again, whereby microorganisms
  • the sludge can be reused in order to perform the sludge treatment by, and the sewage treatment can be performed more efficiently.
  • the sewage when the sewage is wound up from the predetermined gaps D1 and D2, the sewage ejected from the ejection nozzle 23 and the two sewage sewed up join together in the guide member 30, and the flow rate is increased. Increase.
  • the opening on the upper side of the guide member 30 is smaller than the opening on the lower side, the sewage can be further accelerated and a propulsive force can also be given to the air bubbles.
  • FIG. 4 is a side sectional view showing a configuration around the ejection nozzle according to the second embodiment.
  • the same portions as those in the first embodiment are denoted by the same reference numerals, and only differences will be described.
  • the ejection port of the ejection nozzle 23 protrudes upward from the bottom surface of the treatment tank 21.
  • the periphery of the protruding portion of the ejection nozzle 23 is covered with an inclined cover 32.
  • the inclined cover 32 is tapered from the bottom surface of the processing tank 21 toward the ejection port of the ejection nozzle 23.
  • FIG. 5 is a side sectional view showing the configuration around the ejection nozzle according to the third embodiment.
  • a guide member 35 flow path regulating portion
  • a constricted flow portion 36 in which a part thereof is restricted, is provided in the processing tank 21.
  • the passage area gradually decreases from the lower portion of the guide member 35 to the contracted portion 36, while the passage area gradually increases from the contracted portion 36 to the upper portion of the guide member 35.
  • the guide member 35 has predetermined gaps D ⁇ b> 1 and D ⁇ b> 2 between the outer peripheral surface of the guide member 35 and the inner peripheral surface of the processing tank 21 and between the lower portion of the guide member 35 and the bottom surface of the processing tank 21. Arranged. The lower part of the guide member 35 overlaps with the ejection port of the ejection nozzle 23 in a side view.
  • the sewage flow can be accelerated only by passing the sewage through the cylindrical guide member 35 having the contracted flow portion 36, and the propelling force can be given to the air bubbles on the accelerated sewage flow. .
  • FIG. 6 is a plan sectional view showing the configuration around the ejection nozzle according to the fourth embodiment
  • FIG. 7 is a side view.
  • the ejection nozzle 23 is attached to the side wall of the processing tank 21, and the opening hole 23 a opened in the side wall of the processing tank 21 so as to communicate with the ejection nozzle 23 is formed in the processing tank 21. It opens so that it may face the direction where sewage flows along the inner peripheral surface.
  • the sewage and air ejected from the ejection nozzle 23 are ejected from the side wall of the processing tank 21 toward the direction along the inner peripheral surface of the processing tank 21, and swirl along the inner peripheral surface of the processing tank 21. However, it will flow upward. The air bubbles ride on this swirling flow and move upward to give a propulsive force, making it easy to drop the sludge adhering to the contact body 22.
  • FIG. 8 is a side cross-sectional view showing the configuration around the ejection nozzle according to the fifth embodiment.
  • the ejection nozzle 23 is attached to the side wall of the processing tank 21, and the opening hole 23 a opened in the side wall of the processing tank 21 so as to communicate with the ejection nozzle 23 is an inner periphery of the processing tank 21.
  • the openings are opened in such a direction that sewage flows along the surface and obliquely upward.
  • the sewage and air ejected from the ejection nozzle 23 are ejected obliquely upward in a direction in which the sewage flows along the inner peripheral surface of the treatment tank 21 from the side wall of the treatment tank 21. It will flow while turning along the inner peripheral surface.
  • the ejection direction of the ejection nozzle 23 is set so that the swirling flow is more positively directed upward, the propulsive force of the air bubbles can be further improved.
  • FIG. 9 is a side sectional view showing a configuration around the ejection nozzle according to the sixth embodiment.
  • a vibrator 38 that vibrates the bottom surface of the processing tank 21 is attached to the bottom surface of the processing tank 21.
  • two vibrators 38 are provided with the ejection nozzle 23 interposed therebetween.
  • the number of vibrators 38 is not limited to this.
  • the vibrator 38 is composed of an air hammer or the like, and is attached in an inclined posture with respect to the bottom surface of the processing tank 21 so that vibration generated by the vibrator 38 is transmitted toward the center of the processing tank 21. ing.
  • the sewage in the processing tank 21 has two slanting upwards toward the central portion of the processing tank 21 as indicated by a virtual line in FIG. A wave will be generated.
  • the two waves generated by the two vibrators 38 merge at a position above the ejection nozzle 23.
  • the air bubbles ejected from the ejection nozzle 23 are propelled by moving upward on the waves generated by the vibrator 38, and it is easy to drop sludge attached to the contact body 22. .
  • sewage and air are mixed in the circulation pipe 25, and the sewage and air are ejected from one ejection nozzle 23.
  • the present invention is not limited to this mode.
  • you may make it comprise the sewage ejection part which ejects sewage, and the air ejection part which ejects air by a separate ejection nozzle, respectively.
  • the configuration using the thread-like fixed carrier as the contact body 22 has been described.
  • a configuration using a block-like fixed carrier may be used.
  • the present invention provides a highly practical effect that can prevent the gaps between the plurality of contact bodies from being blocked by the attached sludge. The possibility is high.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Mechanical Engineering (AREA)
  • Removal Of Floating Material (AREA)
  • Biological Treatment Of Waste Water (AREA)
  • Activated Sludge Processes (AREA)

Abstract

According to the present invention, a treatment tank 21 is provided therein with: a plurality of contact bodies 22 that allow the adhesion of sludge; a jet nozzle 23 that is provided below the contact bodies 22 and that jets the sludge and air into the treatment tank 21; and a guide member 30 disposed between the contact bodies 22 and the jet nozzle 23. The guide member 30 is formed in a cylindrical shape that extends vertically, and has a diameter gradually decreasing upward. The flow of the sludge jetted from the jet nozzle 23 is accelerated when passing through the guide member 30, and a propulsive force is applied to air bubbles by the accelerated flow of the sludge.

Description

汚水処理装置Sewage treatment equipment
　本発明は、汚水処理装置に関するものである。 The present invention relates to a sewage treatment apparatus.
　従来より、接触体（紐状濾材）の列からなる濾材膜を水処理槽内に吊り下げておき、濾材膜に汚泥を付着させることで、濾材膜に付着した微生物による汚泥処理を行うようにした水処理用混床が知られている（例えば、特許文献１参照）。 Conventionally, a filter medium membrane consisting of a row of contact bodies (string-like filter media) is suspended in a water treatment tank, and sludge is adhered to the filter media membrane so as to perform sludge treatment with microorganisms attached to the filter media membrane. A mixed water treatment bed is known (for example, see Patent Document 1).
　ここで、濾材膜に汚泥を付着させるのにあたって、例えば、濾材膜の下方に配置された噴出ノズルから濾材膜に向かって汚水を噴出させ、水処理槽内で汚水を下方から上方に拡散させることが行われる。 Here, when attaching the sludge to the filter medium film, for example, sewage is jetted from the jet nozzle arranged below the filter medium film toward the filter medium film, and the sewage is diffused upward from below in the water treatment tank. Is done.
特許第２８９１４５３号公報Japanese Patent No. 2891453
　ところで、従来の構成において、複数の接触体が密集して配置されていた場合には、接触体に付着して成長した汚泥の塊によって、隣り合う接触体の間の隙間が狭くなっていき、最終的には、その隙間が閉塞されて汚水が通過できなくなることがある。そして、接触体の一部の列の隙間が閉塞されると、汚水は、未だ閉塞されていない他の接触体の列の隙間を通過することとなる。 By the way, in the conventional configuration, when a plurality of contact bodies are densely arranged, a gap between adjacent contact bodies is narrowed by a sludge mass that has adhered to and grown on the contact bodies. Eventually, the gap may be blocked and sewage may not pass. And if the clearance gap of the one part row | line | column of a contact body is obstruct | occluded, dirty water will pass the clearance gap of the row | line | column of the other contact body which is not obstruct | occluded yet.
　しかしながら、隙間が閉塞されて汚水が通過できなくなった接触体の列であっても、接触体の下部側に汚泥の塊が付着しただけで、接触体の上部側では、汚泥がそれほど付着していないことがある。そして、水処理槽全体に汚水が流通しなくなった結果、接触体の汚泥の付着分布に偏りが生じてしまい、汚泥処理を効率良く行うことができないという問題がある。 However, even in a row of contact bodies in which the gaps are blocked and the sewage cannot pass, only sludge lump has adhered to the lower side of the contact body, and so much sludge has adhered to the upper side of the contact body. There may not be. And as a result of the fact that sewage no longer circulates throughout the water treatment tank, there is a problem that the sludge adhesion distribution of the contact body is biased and sludge treatment cannot be performed efficiently.
　本発明は、かかる点に鑑みてなされたものであり、その目的は、付着した汚泥によって複数の接触体の間の隙間が閉塞するのを抑えることにある。 The present invention has been made in view of such a point, and an object thereof is to suppress clogging of gaps between a plurality of contact bodies due to attached sludge.
　本発明は、汚泥を含む汚水を処理する汚水処理装置を対象とし、次のような解決手段を講じた。 The present invention is directed to a sewage treatment apparatus that treats sewage containing sludge, and has taken the following solutions.
　すなわち、第１の発明は、汚水が貯留される処理槽と、
　前記処理槽内に設けられ、汚泥を付着させる複数の接触体と、
　前記処理槽内の前記接触体に向かって汚水を噴出する汚水噴出部と、
　前記処理槽内に空気を噴出する空気噴出部と、
　前記汚水噴出部から噴出された汚水の流路を規制する流路規制部とを備えたことを特徴とするものである。 That is, the first invention is a treatment tank in which sewage is stored;
A plurality of contact bodies provided in the treatment tank, to which sludge is attached;
A sewage ejection part for ejecting sewage toward the contact body in the treatment tank;
An air ejection part for ejecting air into the treatment tank;
And a flow path restricting part for restricting a flow path of the sewage ejected from the sewage ejecting part.
　第１の発明では、処理槽内の接触体に向かって汚水を噴出する汚水噴出部と空気を噴出する空気噴出部とが設けられる。汚水噴出部から処理槽内に噴出された汚水は、接触体に向かう途中で流路規制部によってその流れが規制される。 In the first invention, a sewage ejection part that ejects sewage toward the contact body in the treatment tank and an air ejection part that ejects air are provided. The flow of the sewage ejected from the sewage ejection part into the treatment tank is regulated by the flow path regulation part on the way to the contact body.
　このような構成とすれば、汚水の流れを規制することで、汚水を加速させて空気泡に推進力を与えることができる。そして、この推進力が与えられた空気泡を接触体に付着された汚泥の塊に衝突させるようにしている。 With such a configuration, by restricting the flow of sewage, it is possible to accelerate the sewage and give propulsion to the air bubbles. And the air bubble to which this propulsive force was given is made to collide with the lump of the sludge adhering to the contact body.
　ここで、接触体としての糸状固定担体に付着した汚泥の塊は、糸状固定担体と絡まり合っている中心部分が固くなる一方、糸状固定担体とそれほど絡まり合っていない外側部分が剥離し易い状態となっている。そのため、汚泥の塊の外側部分のみを剥離可能な程度の推進力を空気泡に与えて、空気泡を汚泥の塊に衝突させることで、隣り合う接触体の間の隙間を閉塞している余分な汚泥の塊の外側部分を落とすことができる。 Here, the lump of sludge adhering to the thread-like fixed carrier as a contact body is hardened at the center part entangled with the thread-like fixed carrier, while the outer part not entangled so much with the thread-like fixed carrier is easily peeled off. It has become. Therefore, by applying a driving force to the air bubbles that can peel only the outer part of the sludge mass, the air bubbles collide with the sludge mass, thereby closing the gap between adjacent contact bodies. The outer part of the sludge lump can be dropped.
　これにより、処理槽全体に汚水を流通させ、複数の接触体の汚泥の付着分布に偏りが生じることなく、汚泥処理を効率良く行うことができる。 This allows sewage to be circulated throughout the treatment tank, and sludge treatment can be efficiently performed without causing a bias in the sludge adhesion distribution of a plurality of contact bodies.
　また、接触体が、処理槽内に吊り下げられた糸状固定担体で構成されていた場合、空気泡に推進力を与えて空気泡の速度を速くすると、カルマン渦が生じることによって揺らぎが沢山生じて処理槽内の汚水全体が揺れ、この汚水の揺れに影響されて糸状固定担体が揺れたり、推進力を与えられた空気泡が勢いよく糸状固定担体に直接衝突することで、糸状固定担体を揺らして、汚水流路を閉塞するような汚泥の塊の外側部分にある剥離し易い汚泥が成長するのを抑えることができる。 In addition, when the contact body is composed of a thread-like fixed carrier suspended in the processing tank, if the air bubbles are propelled to increase the speed of the air bubbles, the Karman vortex is generated, resulting in a lot of fluctuations. The entire sewage in the treatment tank shakes, and the swaying of the sewage causes the thread-like fixed carrier to sway. By shaking, it is possible to suppress the growth of sludge that is easily peeled off at the outer portion of the sludge block that closes the sewage flow path.
　なお、汚水噴出部と空気噴出部とは、それぞれ別体の噴出ノズルで構成してもよいし、汚水と空気とが混ざり合った状態で噴出される１つの噴出ノズルで構成してもよい。 It should be noted that the sewage ejection part and the air ejection part may be composed of separate ejection nozzles, or may be composed of one ejection nozzle that is ejected in a state where sewage and air are mixed.
　第２の発明は、第１の発明において、
　前記汚水噴出部は、前記処理槽の底面側から上方に向かって汚水を噴出するように構成されていることを特徴とするものである。 According to a second invention, in the first invention,
The sewage ejection part is configured to eject sewage upward from the bottom surface side of the treatment tank.
　第２の発明では、処理槽の底面側から上方に向かって汚水を噴出させることで、接触体に向かう空気泡の推進力がより向上することとなり、接触体に付着した汚泥の塊を落とし易くなる。 In the second invention, the sewage is jetted upward from the bottom side of the treatment tank, so that the propulsive force of the air bubbles toward the contact body is further improved, and it is easy to drop sludge attached to the contact body. Become.
　また、接触体が、処理槽内に吊り下げられた糸状固定担体で構成されており、汚水噴出部が処理槽の底面の中央位置に配置されていた場合、汚水噴出部から噴出された汚水が供給されやすい、接触体の下方中央部ばかりが汚泥の成長が速くなり、その部分に汚泥の塊ができやすくなって、特に、汚水流路が閉塞し易くなる。 Further, when the contact body is composed of a thread-like fixed carrier suspended in the treatment tank and the sewage ejection part is arranged at the center position of the bottom surface of the treatment tank, the sewage ejected from the sewage ejection part is Only the lower center part of the contact body, which is easily supplied, grows sludge quickly, and it becomes easy to form a lump of sludge at that portion, and in particular, the sludge flow path is easily blocked.
　そこで、汚水噴出部の上方に流路規制部を配置し、汚水噴出部から噴出された汚水の流れを規制することで、接触体の下方中央部の汚水の流速を速くして、汚水を勢い良く接触体の下方中央部に衝突させて汚泥を剥離させ、汚泥の塊による汚水流路の閉塞を無くすことができる。 Therefore, a flow path restriction part is arranged above the sewage ejection part, and the flow rate of sewage ejected from the sewage ejection part is restricted, thereby increasing the flow rate of the sewage in the lower central part of the contact body, The sludge can be peeled off by colliding with the lower center part of the contact body well, and the blockage of the sewage flow path by the sludge lump can be eliminated.
　第３の発明は、第２の発明において、
　前記流路規制部は、上下方向に延びる筒状に形成され且つ上方に向かうほど先細となったガイド部材で構成されていることを特徴とするものである。 According to a third invention, in the second invention,
The flow path restricting portion is formed of a guide member that is formed in a cylindrical shape extending in the vertical direction and becomes tapered toward the upper side.
　第３の発明では、上方に向かうほど先細となった筒状のガイド部材に汚水を通過させるだけで、汚水を流れを加速させることができる。また、ガイド部材が先細形状となっているので、その傾斜面に沿って汚泥が流れ落ちることとなり、ガイド部材の表面に汚泥が溜まるのを抑えることができる。 In the third invention, the flow of sewage can be accelerated only by passing the sewage through a cylindrical guide member that tapers toward the top. Moreover, since the guide member has a tapered shape, sludge flows down along the inclined surface, and accumulation of sludge on the surface of the guide member can be suppressed.
　第４の発明は、第２の発明において、
　前記流路規制部は、上下方向に延びる筒状に形成され且つ筒内の一部が絞られた縮流部を有するガイド部材で構成されていることを特徴とするものである。 According to a fourth invention, in the second invention,
The flow path restricting portion is formed of a guide member that is formed in a cylindrical shape extending in the vertical direction and has a contracted flow portion in which a part of the cylinder is narrowed.
　第４の発明では、縮流部を有する筒状のガイド部材に汚水を通過させるだけで、汚水の流れを加速させることができる。 In the fourth invention, the flow of sewage can be accelerated only by passing the sewage through a cylindrical guide member having a contracted portion.
　第５の発明は、第３又は第４の発明において、
　前記ガイド部材は、該ガイド部材の外周面と前記処理槽の内周面との間、及び該ガイド部材の下部と該処理槽の底面との間に所定の隙間を存して配設されていることを特徴とするものである。 A fifth invention is the third or fourth invention, wherein
The guide member is disposed with a predetermined gap between the outer peripheral surface of the guide member and the inner peripheral surface of the processing tank, and between the lower portion of the guide member and the bottom surface of the processing tank. It is characterized by being.
　第５の発明では、ガイド部材の外周面と処理槽の内周面との間、及びガイド部材の下部と処理槽の底面との間に、所定の隙間を設けることで、ガイド部材の内部を通過した汚水の一部が、これらの隙間を通って再びガイド部材の下側の開口から吸い込まれるように循環する。これにより、循環された汚水によって処理槽の底面に溜まった汚泥を巻き上げて、巻き上げた汚泥を接触体に向かって噴出させることができる。 In the fifth invention, by providing a predetermined gap between the outer peripheral surface of the guide member and the inner peripheral surface of the processing tank and between the lower part of the guide member and the bottom surface of the processing tank, the inside of the guide member is A part of the sewage that has passed circulates through these gaps so as to be sucked again from the lower opening of the guide member. Thereby, the sludge collected on the bottom surface of the treatment tank by the circulated sewage can be rolled up, and the rolled up sludge can be ejected toward the contact body.
　第６の発明は、第２乃至第５の発明のうち何れか１つにおいて、
　前記汚水噴出部の噴出口は、前記処理槽の底面よりも上方に突出していることを特徴とするものである。 According to a sixth invention, in any one of the second to fifth inventions,
The jet outlet of the sewage jet part protrudes upward from the bottom surface of the treatment tank.
　第６の発明では、汚水噴出部の噴出口を処理槽の底面よりも上方に突出させたことで、汚水噴出部から流路規制部までの距離を短くすることができる。これにより、処理槽の底面から汚水を噴出する場合に比べて、少ない動力で高い噴出力を得ることができる。 In the sixth invention, the distance from the sewage ejection part to the flow path regulating part can be shortened by projecting the ejection port of the sewage ejection part above the bottom surface of the treatment tank. Thereby, compared with the case where sewage is jetted from the bottom face of a processing tank, a high jet power can be obtained with little power.
　第７の発明は、第６の発明において、
　前記汚水噴出部の突出部分の周囲を覆うとともに、前記処理槽の底面から該汚水噴出部の噴出口に向かうほど先細となった傾斜カバーを備えたことを特徴とするものである。 A seventh invention is the sixth invention, wherein
In addition to covering the periphery of the protruding portion of the sewage ejection part, an inclined cover that tapers from the bottom surface of the treatment tank toward the ejection port of the sewage ejection part is provided.
　第７の発明では、汚水噴出部の突出部分は、先細の傾斜カバーによって覆われている。これにより、汚水噴出部の突出部分と処理槽の底面との隅部に汚泥が溜まるのを防ぐとともに、流路規制部で加速された後で処理槽の底面側に循環されてきた汚水を、傾斜カバーの傾斜面に沿って汚水噴出部の噴出口に向かってスムーズに導くことができる。 In the seventh invention, the protruding portion of the sewage ejection portion is covered with a tapered inclined cover. This prevents sludge from accumulating at the corners of the protruding portion of the sewage ejection portion and the bottom surface of the treatment tank, and the sewage that has been circulated to the bottom surface side of the treatment tank after being accelerated by the flow path regulating portion, It can guide smoothly toward the spout of a sewage ejection part along the inclined surface of an inclined cover.
　第８の発明は、汚泥を含む汚水を処理する汚水処理装置であって、
　上下方向に延びる円筒状に形成されて汚水が貯留される処理槽と、
　前記処理槽内に設けられ、汚泥を付着させる複数の接触体と、
　前記接触体よりも下方に設けられ、前記処理槽内に汚水を噴出する汚水噴出部と、
　前記接触体よりも下方に設けられ、前記処理槽内に空気を噴出する空気噴出部とを備え、
　前記汚水噴出部は、前記処理槽の側壁から該処理槽の内周面に沿うような方向に向かって汚水を噴出するように構成されていることを特徴とするものである。 The eighth invention is a sewage treatment apparatus for treating sewage containing sludge,
A treatment tank in which sewage is stored in a cylindrical shape extending in the vertical direction;
A plurality of contact bodies provided in the treatment tank, to which sludge is attached;
Provided below the contact body, and a sewage ejection part for ejecting sewage into the treatment tank,
An air ejection part provided below the contact body and ejecting air into the treatment tank;
The sewage ejection part is configured to eject sewage from a side wall of the treatment tank in a direction along the inner peripheral surface of the treatment tank.
　第８の発明では、複数の接触体の下方に、処理槽内に汚水を噴出する汚水噴出部と空気を噴出する空気噴出部とが設けられる。汚水噴出部から噴出された汚水は、処理槽の側壁から処理槽の内周面に沿うような方向に向かって流れる。 In the eighth invention, a sewage ejection part for ejecting sewage into the treatment tank and an air ejection part for ejecting air are provided below the plurality of contact bodies. The sewage ejected from the sewage ejection part flows in a direction along the inner peripheral surface of the treatment tank from the side wall of the treatment tank.
　このような構成とすれば、汚水噴出部から噴出された汚水は、処理槽の内周面に沿って旋回しながら上方に向かって流れるので、空気泡は、この旋回流に乗って上方に移動することで推進力が与えられ、接触体に付着した汚泥の塊を落とし易くなる。 With such a configuration, the sewage ejected from the sewage ejection section flows upward while swirling along the inner peripheral surface of the treatment tank, so that the air bubbles move upward along the swirl flow. By doing so, a propulsive force is given and it becomes easy to drop the lump of sludge adhering to a contact body.
　また、処理槽内に、旋回しながら上方に向かって流れる旋回流が発生した場合には、旋回流の中心部に、逆向きの流れ、つまり、下向きに流れる下降流が発生する。この下降流が底面に当たることによって、処理槽の底面に溜まった汚泥を巻き上げて、巻き上げた汚泥を接触体に向かって噴出させることができる。 In addition, when a swirl flow that flows upward while rotating in the treatment tank is generated, a reverse flow, that is, a downward flow that flows downward is generated at the center of the swirl flow. When this downward flow hits the bottom surface, the sludge accumulated on the bottom surface of the treatment tank can be rolled up, and the rolled up sludge can be ejected toward the contact body.
　第９の発明は、第８の発明において、
　前記汚水噴出部は、前記処理槽の側壁から該処理槽の内周面に沿うような方向で且つ斜め上方に向かって汚水を噴出するように構成されていることを特徴とするものである。 In a ninth aspect based on the eighth aspect,
The sewage ejection part is configured to eject sewage from a side wall of the treatment tank in a direction along the inner peripheral surface of the treatment tank and obliquely upward.
　第９の発明では、汚水噴出部から噴出された汚水が、処理槽の側壁から処理槽の内周面に沿うような方向で且つ斜め上方に向かって流れるようにしたから、処理槽の内周面に沿って旋回しながら流れる旋回流を、より積極的に上方に向かわせることができる。これにより、空気泡の推進力をより向上させることができる。 In the ninth aspect of the invention, since the sewage ejected from the sewage ejection part flows in a direction along the inner peripheral surface of the processing tank from the side wall of the processing tank and obliquely upward, the inner periphery of the processing tank The swirl flow that flows while swirling along the surface can be more actively directed upward. Thereby, the propulsive force of air bubbles can be further improved.
　第１０の発明は、汚泥を含む汚水を処理する汚水処理装置であって、
　汚水が貯留される処理槽と、
　前記処理槽内に設けられ、汚泥を付着させる複数の接触体と、
　前記接触体よりも下方に設けられ、前記処理槽内に汚水を噴出する汚水噴出部と、
　前記接触体よりも下方に設けられ、前記処理槽内に空気を噴出する空気噴出部と、
　前記処理槽の底面を振動させる振動子とを備えたことを特徴とするものである。 The tenth invention is a sewage treatment apparatus for treating sewage containing sludge,
A treatment tank in which sewage is stored;
A plurality of contact bodies provided in the treatment tank, to which sludge is attached;
Provided below the contact body, and a sewage ejection part for ejecting sewage into the treatment tank,
An air ejection part provided below the contact body and ejecting air into the treatment tank;
And a vibrator for vibrating the bottom surface of the treatment tank.
　第１０の発明では、処理槽の底面を振動子によって振動させると、処理槽内の汚水には、上方に向かう波が発生することとなる。空気泡は、この波に乗って上方に移動することで推進力が与えられ、接触体に付着した汚泥の塊を落とし易くなる。 In the tenth invention, when the bottom surface of the processing tank is vibrated by the vibrator, upward waves are generated in the sewage in the processing tank. The air bubbles are given a propulsive force by moving upward on this wave, and it is easy to remove sludge lump attached to the contact body.
　本発明によれば、空気泡に推進力を与え、この空気泡を接触体に付着した汚泥の塊に衝突させることで、隣り合う接触体の間の隙間を閉塞している余分な汚泥の塊を落とすことができる。 According to the present invention, an excess sludge block that gives a propulsive force to air bubbles and collides with the lump of sludge adhering to the contact body to block the gap between adjacent contact bodies. Can be dropped.
図１は、本実施形態１に係る汚水処理装置を備えた汚泥処理システムを示す概略図である。FIG. 1 is a schematic diagram illustrating a sludge treatment system including the sewage treatment apparatus according to the first embodiment. 図２は、汚水処理装置の構成を示す概略図である。FIG. 2 is a schematic diagram showing the configuration of the sewage treatment apparatus. 図３は、噴出ノズル周辺の構成を示す側面断面図である。FIG. 3 is a side sectional view showing the configuration around the ejection nozzle. 図４は、本実施形態２に係る噴出ノズル周辺の構成を示す側面断面図である。FIG. 4 is a side sectional view showing a configuration around the ejection nozzle according to the second embodiment. 図５は、本実施形態３に係る噴出ノズル周辺の構成を示す側面断面図である。FIG. 5 is a side sectional view showing the configuration around the ejection nozzle according to the third embodiment. 図６は、本実施形態４に係る噴出ノズル周辺の構成を示す平面断面図である。FIG. 6 is a plan cross-sectional view showing the configuration around the ejection nozzle according to the fourth embodiment. 図７は、噴出ノズル周辺の構成を示す側面断面図である。FIG. 7 is a side sectional view showing the configuration around the ejection nozzle. 図８は、本実施形態５に係る噴出ノズル周辺の構成を示す側面断面図である。FIG. 8 is a side cross-sectional view showing the configuration around the ejection nozzle according to the fifth embodiment. 図９は、本実施形態６に係る噴出ノズル周辺の構成を示す側面断面図である。FIG. 9 is a side sectional view showing a configuration around the ejection nozzle according to the sixth embodiment.
　以下、本発明の実施形態を図面に基づいて説明する。なお、以下の好ましい実施形態の説明は、本質的に例示に過ぎず、本発明、その適用物或いはその用途を制限することを意図するものではない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature and is not intended to limit the present invention, its application, or its use.
　《実施形態１》
　図１に示すように、汚泥処理システム１０は、汚水受入槽１１と、一次処理槽２０と、二次処理槽４０と、膜処理水槽５０とを備えている。 Embodiment 1
As shown in FIG. 1, the sludge treatment system 10 includes a sewage receiving tank 11, a primary treatment tank 20, a secondary treatment tank 40, and a membrane treatment water tank 50.
　汚水受入槽１１には、外部から供給された汚泥を含む汚水が貯留されている。汚水受入槽１１の底部には、空気供給部１２が設けられている。空気供給部１２には、エア配管１３を介してエアポンプ１４が接続されている。そして、エアポンプ１４を駆動させるとともに、図示しない開閉弁を開くことで、汚水受入槽１１内には、空気供給部１２を介して空気が供給される。 The sewage receiving tank 11 stores sewage containing sludge supplied from the outside. An air supply unit 12 is provided at the bottom of the sewage receiving tank 11. An air pump 14 is connected to the air supply unit 12 via an air pipe 13. And while driving the air pump 14 and opening the opening-and-closing valve which is not illustrated, air is supplied in the sewage receiving tank 11 via the air supply part 12.
　汚水受入槽１１と一次処理槽２０とは、第１の水配管１５によって接続されている。第１の水配管１５には、汚水ポンプ１６が接続されている。そして、汚水ポンプ１６を駆動させることで、汚水受入槽１１内の汚水が、第１の水配管１５を介して一次処理槽２０の後述する第１のオーバーフロー受入槽２４に供給される。 The sewage receiving tank 11 and the primary treatment tank 20 are connected by a first water pipe 15. A sewage pump 16 is connected to the first water pipe 15. Then, by driving the sewage pump 16, sewage in the sewage receiving tank 11 is supplied to a first overflow receiving tank 24 described later of the primary treatment tank 20 through the first water pipe 15.
　一次処理槽２０は、汚泥を含む汚水を処理する汚水処理装置であり、汚水が貯留される処理槽２１と、処理槽２１内に設けられた複数の接触体２２と、処理槽２１内に汚水及び空気を噴出する噴出ノズル２３（汚水噴出部、空気噴出部）とを備えている。接触体２２は、汚泥を捕捉可能な糸状固定担体で構成されている。 The primary treatment tank 20 is a sewage treatment apparatus that treats sewage containing sludge, and includes a treatment tank 21 in which sewage is stored, a plurality of contacts 22 provided in the treatment tank 21, and sewage in the treatment tank 21. And an ejection nozzle 23 (sewage ejection part, air ejection part) for ejecting air. The contact body 22 is composed of a thread-like fixed carrier capable of capturing sludge.
　処理槽２１は、上下方向に延びる円筒状に形成されており、その上端側には、第１のオーバーフロー受入槽２４と、第２のオーバーフロー受入槽２７とが設けられている。 The processing tank 21 is formed in a cylindrical shape extending in the vertical direction, and a first overflow receiving tank 24 and a second overflow receiving tank 27 are provided on the upper end side thereof.
　第１のオーバーフロー受入槽２４は、処理槽２１の上方開口から溢れ出した汚水を受け入れるものである。また、第１のオーバーフロー受入槽２４には、汚水受入槽１１の第１の水配管１５から供給される汚水も流入する。 The first overflow receiving tank 24 receives sewage overflowing from the upper opening of the processing tank 21. Further, sewage supplied from the first water pipe 15 of the sewage receiving tank 11 also flows into the first overflow receiving tank 24.
　第１のオーバーフロー受入槽２４の底部には、循環配管２５の一端が接続されている。循環配管２５の他端は、処理槽２１の底部に取り付けられた噴出ノズル２３に接続されている。循環配管２５には、循環ポンプ２６が接続されている。また、循環配管２５における循環ポンプ２６よりも下流側には、エア配管１３を介してエアポンプ１４が接続されている。 One end of a circulation pipe 25 is connected to the bottom of the first overflow receiving tank 24. The other end of the circulation pipe 25 is connected to an ejection nozzle 23 attached to the bottom of the processing tank 21. A circulation pump 26 is connected to the circulation pipe 25. An air pump 14 is connected to the downstream side of the circulation pipe 25 from the circulation pump 26 via the air pipe 13.
　そして、循環ポンプ２６及びエアポンプ１４を駆動させるとともに、図示しない開閉弁を開くことで、第１のオーバーフロー受入槽２４内の汚水が、循環配管２５を介して噴出ノズル２３に向かうとともに、循環配管２５内において、汚水と空気とが混ざり合うこととなる。これにより、噴出ノズル２３から処理槽２１内に、汚水と空気が混ざり合った状態で噴出される。 Then, the circulation pump 26 and the air pump 14 are driven, and an open / close valve (not shown) is opened, so that the sewage in the first overflow receiving tank 24 goes to the ejection nozzle 23 via the circulation pipe 25 and the circulation pipe 25. Inside, sewage and air are mixed. Thus, the sewage and air are ejected from the ejection nozzle 23 into the treatment tank 21 in a mixed state.
　第２のオーバーフロー受入槽２７は、処理槽２１の上方開口から溢れ出した汚水を受け入れるものである。第２のオーバーフロー受入槽２７の底部には、第２の水配管２８が接続されている。第２の水配管２８の下流端は、二次処理槽４０の上方に配置され、第２のオーバーフロー受入槽２７から第２の水配管２８を流通した汚水が、二次処理槽４０に供給される。 The second overflow receiving tank 27 receives sewage overflowing from the upper opening of the processing tank 21. A second water pipe 28 is connected to the bottom of the second overflow receiving tank 27. The downstream end of the second water pipe 28 is disposed above the secondary treatment tank 40, and the sewage flowing through the second water pipe 28 from the second overflow receiving tank 27 is supplied to the secondary treatment tank 40. The
　二次処理槽４０は、一次処理槽２０で処理した後の汚水に残存している未処理分を取り除くためのものである。二次処理槽４０内には、汚泥を付着させる複数の接触体４１と、接触体４１よりも下方に配置された空気供給部４２とが設けられている。空気供給部４２には、エア配管１３を介してエアポンプ１４が接続されている。そして、エアポンプ１４を駆動させるとともに、図示しない開閉弁を開くことで、二次処理槽４０内には、空気供給部４２を介して空気が供給される。 The secondary treatment tank 40 is for removing untreated components remaining in the sewage after being treated in the primary treatment tank 20. In the secondary treatment tank 40, a plurality of contact bodies 41 to which sludge is attached and an air supply unit 42 disposed below the contact bodies 41 are provided. The air pump 14 is connected to the air supply unit 42 via the air pipe 13. Then, the air pump 14 is driven and an open / close valve (not shown) is opened, whereby air is supplied into the secondary treatment tank 40 via the air supply unit 42.
　膜処理水槽５０は、二次処理槽４０に隣接して設置されており、二次処理槽４０の下方開口から流入した汚水を受け入れるものである。膜処理水槽５０内には、汚水を濾過する複数の濾過膜５１と、濾過膜５１よりも下方に配置された空気供給部５２とが設けられている。空気供給部５２には、エア配管１３を介してエアポンプ１４が接続されている。そして、エアポンプ１４を駆動させるとともに、図示しない開閉弁を開くことで、膜処理水槽５０内には、空気供給部５２を介して空気が供給される。 The membrane treatment water tank 50 is installed adjacent to the secondary treatment tank 40 and receives sewage flowing from the lower opening of the secondary treatment tank 40. In the membrane-treated water tank 50, a plurality of filtration membranes 51 for filtering sewage and an air supply unit 52 disposed below the filtration membrane 51 are provided. The air pump 14 is connected to the air supply unit 52 via the air pipe 13. And while driving the air pump 14 and opening the on-off valve (not shown), air is supplied into the membrane-treated water tank 50 via the air supply unit 52.
　濾過膜５１には、処理水配管５３が接続されている。処理水配管５３には、処理水ポンプ５４が接続されている。そして、処理水ポンプ５４を駆動させることで、濾過膜５１で濾過された処理水が、処理水配管５３から排水される。 A treated water pipe 53 is connected to the filtration membrane 51. A treated water pump 54 is connected to the treated water pipe 53. And the treated water filtered with the filter membrane 51 is drained from the treated water piping 53 by driving the treated water pump 54.
　膜処理水槽５０の底部には、汚泥を回収する汚泥回収配管５５が接続されている。汚泥回収配管５５には、汚泥ポンプ５６が接続されている。そして、汚泥ポンプ５６を駆動させることで、膜処理水槽５０の底部に沈殿した汚泥が汚泥回収配管５５から回収される。 A sludge collection pipe 55 for collecting sludge is connected to the bottom of the membrane treatment water tank 50. A sludge pump 56 is connected to the sludge recovery pipe 55. Then, by driving the sludge pump 56, the sludge precipitated at the bottom of the membrane treatment water tank 50 is recovered from the sludge recovery pipe 55.
　図２に示すように、汚水処理装置としての一次処理槽２０には、上述したように、処理槽２１内に設けられた複数の接触体２２と、処理槽２１の底面側から上方に向かって汚水と空気とを噴出させる噴出ノズル２３とが設けられている。噴出ノズル２３の噴出口は、処理槽２１の底面よりも上方に突出している。 As shown in FIG. 2, in the primary treatment tank 20 as the sewage treatment apparatus, as described above, the plurality of contact bodies 22 provided in the treatment tank 21 and the bottom side of the treatment tank 21 are directed upward. An ejection nozzle 23 for ejecting sewage and air is provided. The ejection port of the ejection nozzle 23 projects upward from the bottom surface of the processing tank 21.
　そして、噴出ノズル２３から接触体２２に向かって汚水と空気とを噴出させることで、汚水に含まれる汚泥を接触体２２に付着させるようにしている。接触体２２に付着した汚泥は、接触体２２に付着していた菌の効果によって浄化される。 Then, sewage and air are ejected from the ejection nozzle 23 toward the contact body 22 so that sludge contained in the sewage adheres to the contact body 22. The sludge adhering to the contact body 22 is purified by the effect of the bacteria adhering to the contact body 22.
　ここで、複数の接触体２２は、汚泥を捕捉可能な糸状固定担体で構成され、上下方向に垂れるように配置されている。噴出ノズル２３から噴出された汚水に含まれる汚泥は、複数の接触体２２の間の隙間を通過する際に、接触体２２に付着するようになっている。 Here, the plurality of contact bodies 22 are made of a thread-like fixed carrier capable of trapping sludge, and are arranged so as to hang down in the vertical direction. The sludge contained in the sewage ejected from the ejection nozzle 23 adheres to the contact body 22 when passing through the gaps between the plurality of contact bodies 22.
　ところが、汚泥が接触体２２に付着して成長すると、隣り合う接触体２２の間の隙間が汚泥の塊によって狭くなっていき、最終的には、その隙間が閉塞されて汚水が通過できなくなるおそれがある。 However, when the sludge adheres to the contact body 22 and grows, the gap between the adjacent contact bodies 22 is narrowed by the lump of sludge, and eventually the gap is blocked and the sewage cannot pass therethrough. There is.
　そこで、本実施形態では、隣り合う接触体２２の間の隙間を閉塞している余分な汚泥の塊を落とすために、噴出ノズル２３から噴出される汚水の流れを加速させて空気泡に推進力を与え、この空気泡を接触体２２に付着された汚泥の塊に衝突させるようにしている。 Therefore, in the present embodiment, in order to drop the excess sludge blockage that blocks the gap between the adjacent contact bodies 22, the flow of sewage ejected from the ejection nozzle 23 is accelerated and the air bubbles are propelled. The air bubbles are caused to collide with the sludge mass attached to the contact body 22.
　具体的に、図３にも示すように、処理槽２１内には、上下方向に延びる筒状に形成され、噴出ノズル２３から噴出された汚水と空気とを通過させるガイド部材３０（流路規制部）が配設されている。 Specifically, as shown in FIG. 3, a guide member 30 (flow path regulation) is formed in the processing tank 21 in a cylindrical shape extending in the vertical direction and allows sewage and air ejected from the ejection nozzle 23 to pass therethrough. Part) is disposed.
　ガイド部材３０は、略円錐状の傘状体であり、上部と下部とを開口した形状であって、上側の開口が下側の開口よりも小さくなるように、上方に向かうほど先細となる形状に形成されている。 The guide member 30 is a substantially conical umbrella-shaped body having a shape in which an upper portion and a lower portion are opened, and a shape that tapers upward as the upper opening becomes smaller than the lower opening. Is formed.
　そして、噴出ノズル２３の噴出口から噴出される汚水を、ガイド部材３０の内部を通過させたときの汚水の流速Ｖは、ガイド部材３０の上側の開口の断面積をＡ、噴出ノズル２３から噴出される汚水の流量をＱとしたときに、以下の（１）式を満たす。 The sewage flow velocity V when the sewage ejected from the ejection port of the ejection nozzle 23 passes through the inside of the guide member 30 is A, the cross-sectional area of the upper opening of the guide member 30 is ejected from the ejection nozzle 23. The following formula (1) is satisfied, where Q is the flow rate of the sewage.
　Ｖ＝Ｑ／Ａ　・・・（１）
　ここで、ガイド部材３０の断面積は、上方に向かって徐々に狭まっていくのに対し、汚水の流量Ｑは一定である。つまり、ガイド部材３０によって汚水の流路を規制して、汚水の流路を徐々に絞り込むことで、圧力が高まり、その圧力に打ち勝つだけの噴出速度を有した汚水が噴出ノズル２３から噴出されて初めて、ガイド部材３０の上側の開口から噴出する汚水を加速させることができる。 V = Q / A (1)
Here, the cross-sectional area of the guide member 30 gradually narrows upward, whereas the flow rate Q of sewage is constant. That is, by restricting the flow path of the sewage by the guide member 30 and gradually narrowing the flow path of the sewage, the pressure increases, and the sewage having an ejection speed that can overcome the pressure is ejected from the ejection nozzle 23. For the first time, the sewage ejected from the upper opening of the guide member 30 can be accelerated.
　また、ガイド部材３０は、ガイド部材３０の外周面と処理槽２１の内周面との間、及びガイド部材３０の下部と処理槽２１の底面との間に所定の隙間Ｄ１，Ｄ２を存して配設されている。ガイド部材３０の下部は、側面視で噴出ノズル２３の噴出口に重なり合っており、噴出ノズル２３から噴出された汚水や空気がガイド部材３０の内部を確実に通過するようにしている。 The guide member 30 has predetermined gaps D <b> 1 and D <b> 2 between the outer peripheral surface of the guide member 30 and the inner peripheral surface of the processing bath 21 and between the lower portion of the guide member 30 and the bottom surface of the processing bath 21. Arranged. The lower part of the guide member 30 overlaps with the ejection port of the ejection nozzle 23 in a side view, so that the sewage and air ejected from the ejection nozzle 23 surely pass through the inside of the guide member 30.
　このように、上方に向かうほど先細となった筒状のガイド部材３０に汚水を通過させるだけで、汚水の流れを加速させることができる。このとき、噴出ノズル２３から汚水とともに噴出される空気泡は、加速された汚水の流れに乗って推進力が与えられることとなる。そして、推進力が与えられた空気泡を接触体２２に直接衝突させたり、空気泡によって生じるカルマン渦の影響によって接触体２２を揺らすことで、接触体２２に付着している余分な汚泥の塊を落とすことができる。 Thus, the flow of sewage can be accelerated only by passing the sewage through the cylindrical guide member 30 that tapers toward the upper side. At this time, the air bubbles ejected together with the sewage from the ejection nozzle 23 ride on the accelerated sewage flow and are given a propulsive force. Then, excessive lump of sludge adhering to the contact body 22 can be obtained by directly colliding the air bubble to which the propulsive force is applied with the contact body 22 or by shaking the contact body 22 by the influence of Karman vortex generated by the air bubble. Can be dropped.
　これにより、隣り合う接触体２２の間の閉塞状態を解消し、処理槽２１全体に汚水を流通させることで、複数の接触体２２の汚泥の付着分布に偏りが生じることなく、汚泥処理を効率良く行うことができる。 Thereby, the obstruction | occlusion state between adjacent contact bodies 22 is eliminated, and sludge treatment is efficiently performed without causing bias in the sludge adhesion distribution of the plurality of contact bodies 22 by circulating the sewage throughout the treatment tank 21. Can be done well.
　さらに、ガイド部材３０の開口部の上方に接触体２２が設置されており、噴出ノズル２３が処理槽２１の下部に設けられているから、噴出ノズル２３から噴出された汚水が下方から上方に向かって噴出される一方、空気泡が浮力によって上昇するため、汚水と空気泡とが両方とも、上方に向かって進むこととなる。これにより、噴出ノズル２３から噴出された汚水や空気泡を、接触体２２に勢いよく衝突させることができる。 Furthermore, since the contact body 22 is installed above the opening of the guide member 30 and the ejection nozzle 23 is provided in the lower part of the treatment tank 21, the sewage ejected from the ejection nozzle 23 is directed upward from below. On the other hand, since the air bubbles rise due to buoyancy, both the sewage and the air bubbles travel upward. Thereby, the sewage and air bubbles ejected from the ejection nozzle 23 can collide with the contact body 22 vigorously.
　また、ガイド部材３０の外周面と処理槽２１の内周面との間、及びガイド部材３０の下部と処理槽２１の底面との間に、所定の隙間Ｄ１，Ｄ２が設けられており、ガイド部材３０の内部を通って汚水が吐出されることにより、噴出ノズル２３の開口部よりも下方において、少し負圧になっている。そのため、ガイド部材３０の内部を通過した汚水の一部が、これらの隙間Ｄ１，Ｄ２を通って再びガイド部材３０の下側の開口から吸い込まれるように循環する。 Further, predetermined gaps D1 and D2 are provided between the outer peripheral surface of the guide member 30 and the inner peripheral surface of the processing tank 21, and between the lower portion of the guide member 30 and the bottom surface of the processing tank 21, and the guide By discharging dirty water through the inside of the member 30, a slightly negative pressure is formed below the opening of the ejection nozzle 23. Therefore, a part of the sewage that has passed through the inside of the guide member 30 circulates through these gaps D1 and D2 so as to be sucked again from the lower opening of the guide member 30.
　これにより、循環された汚水によって、処理槽２１の底面に溜まった汚泥を巻き上げて、巻き上げた汚泥を接触体２２に向かって噴出させて、再度、接触体２２に汚泥を付着させることで、微生物による汚泥処理を行うために汚泥を再利用し、より効率的に汚水処理を行うことができる。 Thereby, the sludge accumulated on the bottom surface of the treatment tank 21 is rolled up by the circulated sewage, the rolled up sludge is ejected toward the contact body 22, and the sludge is adhered to the contact body 22 again, whereby microorganisms The sludge can be reused in order to perform the sludge treatment by, and the sewage treatment can be performed more efficiently.
　また、所定の隙間Ｄ１，Ｄ２から汚水が巻き上げられることによって、ガイド部材３０の内部には、噴出ノズル２３から噴出された汚水と、巻き上げられた汚水の二つの汚水が合流することとなり、流量が増える。ここで、ガイド部材３０の上側の開口は、下側の開口よりも小さくなっているので、汚水をさらに加速させるとともに、空気泡にも推進力をさらに与えることができる。 In addition, when the sewage is wound up from the predetermined gaps D1 and D2, the sewage ejected from the ejection nozzle 23 and the two sewage sewed up join together in the guide member 30, and the flow rate is increased. Increase. Here, since the opening on the upper side of the guide member 30 is smaller than the opening on the lower side, the sewage can be further accelerated and a propulsive force can also be given to the air bubbles.
　《実施形態２》
　図４は、本実施形態２に係る噴出ノズル周辺の構成を示す側面断面図である。以下、前記実施形態１と同じ部分については同じ符号を付し、相違点についてのみ説明する。 << Embodiment 2 >>
FIG. 4 is a side sectional view showing a configuration around the ejection nozzle according to the second embodiment. Hereinafter, the same portions as those in the first embodiment are denoted by the same reference numerals, and only differences will be described.
　図４に示すように、噴出ノズル２３の噴出口は、処理槽２１の底面よりも上方に突出している。噴出ノズル２３の突出部分の周囲は、傾斜カバー３２によって覆われている。傾斜カバー３２は、処理槽２１の底面から噴出ノズル２３の噴出口に向かうほど先細となっている。 As shown in FIG. 4, the ejection port of the ejection nozzle 23 protrudes upward from the bottom surface of the treatment tank 21. The periphery of the protruding portion of the ejection nozzle 23 is covered with an inclined cover 32. The inclined cover 32 is tapered from the bottom surface of the processing tank 21 toward the ejection port of the ejection nozzle 23.
　これにより、噴出ノズル２３の突出部分と処理槽２１の底面との隅部に汚泥が溜まるのを傾斜カバー３２によって防ぐとともに、ガイド部材３０を通過した後で処理槽２１の底面側に循環されてきた汚水を、傾斜カバー３２の傾斜面に沿って噴出ノズル２３の噴出口に向かってスムーズに導くことができる。 This prevents sludge from accumulating at the corner between the protruding portion of the ejection nozzle 23 and the bottom surface of the processing tank 21 by the inclined cover 32 and is circulated to the bottom surface side of the processing tank 21 after passing through the guide member 30. The dirty water can be smoothly guided along the inclined surface of the inclined cover 32 toward the ejection port of the ejection nozzle 23.
　《実施形態３》
　図５は、本実施形態３に係る噴出ノズル周辺の構成を示す側面断面図である。図５に示すように、処理槽２１内には、上下方向に延びる筒状に形成され、噴出ノズル２３から噴出された汚水と空気とを通過させるガイド部材３５（流路規制部）が配設されている。ガイド部材３５の筒内には、その一部が絞られた縮流部３６が設けられている。ガイド部材３５の筒内は、ガイド部材３５の下部から縮流部３６にかけて通路面積が徐々に狭くなる一方、縮流部３６からガイド部材３５の上部にかけて通路面積が徐々に広がるように形成されており、この広がり方向に沿って汚水を流通させることで、通常、汚水が行き亘り難い処理槽２１の端にまで汚水を広げることができる。 << Embodiment 3 >>
FIG. 5 is a side sectional view showing the configuration around the ejection nozzle according to the third embodiment. As shown in FIG. 5, a guide member 35 (flow path regulating portion) that is formed in a cylindrical shape extending in the vertical direction and allows the sewage and air ejected from the ejection nozzle 23 to pass therethrough is disposed in the processing tank 21. Has been. In the cylinder of the guide member 35, a constricted flow portion 36, in which a part thereof is restricted, is provided. In the cylinder of the guide member 35, the passage area gradually decreases from the lower portion of the guide member 35 to the contracted portion 36, while the passage area gradually increases from the contracted portion 36 to the upper portion of the guide member 35. In addition, by circulating the sewage along this spreading direction, the sewage can be spread to the end of the treatment tank 21 where the sewage is usually difficult to reach.
　また、ガイド部材３５は、ガイド部材３５の外周面と処理槽２１の内周面との間、及びガイド部材３５の下部と処理槽２１の底面との間に所定の隙間Ｄ１，Ｄ２を存して配設されている。ガイド部材３５の下部は、側面視で噴出ノズル２３の噴出口に重なり合っている。 The guide member 35 has predetermined gaps D <b> 1 and D <b> 2 between the outer peripheral surface of the guide member 35 and the inner peripheral surface of the processing tank 21 and between the lower portion of the guide member 35 and the bottom surface of the processing tank 21. Arranged. The lower part of the guide member 35 overlaps with the ejection port of the ejection nozzle 23 in a side view.
　このように、縮流部３６を有する筒状のガイド部材３５に汚水を通過させるだけで、汚水の流れを加速させ、加速された汚水の流れに乗って空気泡に推進力を与えることができる。 Thus, the sewage flow can be accelerated only by passing the sewage through the cylindrical guide member 35 having the contracted flow portion 36, and the propelling force can be given to the air bubbles on the accelerated sewage flow. .
　《実施形態４》
　図６は、本実施形態４に係る噴出ノズル周辺の構成を示す平面断面図、図７は側面図である。図６及び図７に示すように、噴出ノズル２３は、処理槽２１の側壁に取り付けられており、噴出ノズル２３に連通するように処理槽２１の側壁に開口した開口孔２３ａは、処理槽２１の内周面に沿って汚水が流れるような方向を向くように開口している。 << Embodiment 4 >>
FIG. 6 is a plan sectional view showing the configuration around the ejection nozzle according to the fourth embodiment, and FIG. 7 is a side view. As shown in FIGS. 6 and 7, the ejection nozzle 23 is attached to the side wall of the processing tank 21, and the opening hole 23 a opened in the side wall of the processing tank 21 so as to communicate with the ejection nozzle 23 is formed in the processing tank 21. It opens so that it may face the direction where sewage flows along the inner peripheral surface.
　これにより、噴出ノズル２３から噴出された汚水と空気は、処理槽２１の側壁から処理槽２１の内周面に沿うような方向に向かって噴出され、処理槽２１の内周面に沿って旋回しながら上方に向かって流れることとなる。空気泡は、この旋回流に乗って上方に移動することで推進力が与えられ、接触体２２に付着した汚泥の塊を落とし易くなる。 Thereby, the sewage and air ejected from the ejection nozzle 23 are ejected from the side wall of the processing tank 21 toward the direction along the inner peripheral surface of the processing tank 21, and swirl along the inner peripheral surface of the processing tank 21. However, it will flow upward. The air bubbles ride on this swirling flow and move upward to give a propulsive force, making it easy to drop the sludge adhering to the contact body 22.
　また、処理槽２１内に、旋回しながら上方に向かって流れる旋回流が発生した場合には、旋回流の中心部に、逆向きの流れ、つまり、下向きに流れる下降流が発生する。この下降流によって、処理槽２１の底面に溜まった汚泥を巻き上げて、巻き上げた汚泥を接触体２２に向かって噴出させることができる。 In addition, when a swirl flow that flows upward while swirling is generated in the treatment tank 21, a reverse flow, that is, a downward flow that flows downward is generated at the center of the swirl flow. By this downward flow, the sludge accumulated on the bottom surface of the treatment tank 21 can be rolled up, and the rolled up sludge can be ejected toward the contact body 22.
　《実施形態５》
　図８は、本実施形態５に係る噴出ノズル周辺の構成を示す側面断面図である。図８に示すように、噴出ノズル２３は、処理槽２１の側壁に取り付けられており、噴出ノズル２３に連通するように処理槽２１の側壁に開口した開口孔２３ａは、処理槽２１の内周面に沿って汚水が流れるような方向で且つ斜め上方を向くように開口している。 << Embodiment 5 >>
FIG. 8 is a side cross-sectional view showing the configuration around the ejection nozzle according to the fifth embodiment. As shown in FIG. 8, the ejection nozzle 23 is attached to the side wall of the processing tank 21, and the opening hole 23 a opened in the side wall of the processing tank 21 so as to communicate with the ejection nozzle 23 is an inner periphery of the processing tank 21. The openings are opened in such a direction that sewage flows along the surface and obliquely upward.
　これにより、噴出ノズル２３から噴出された汚水と空気は、処理槽２１の側壁から処理槽２１の内周面に沿って汚水が流れるような方向で且つ斜め上方に向かって噴出され、処理槽２１の内周面に沿って旋回しながら流れることとなる。ここで、旋回流がより積極的に上方に向かうように、噴出ノズル２３の噴出方向を設定しているので、空気泡の推進力をより向上させることができる。 As a result, the sewage and air ejected from the ejection nozzle 23 are ejected obliquely upward in a direction in which the sewage flows along the inner peripheral surface of the treatment tank 21 from the side wall of the treatment tank 21. It will flow while turning along the inner peripheral surface. Here, since the ejection direction of the ejection nozzle 23 is set so that the swirling flow is more positively directed upward, the propulsive force of the air bubbles can be further improved.
　《実施形態６》
　図９は、本実施形態６に係る噴出ノズル周辺の構成を示す側面断面図である。図９に示すように、処理槽２１の底面には、処理槽２１の底面を振動させる振動子３８が取り付けられている。図９に示す例では、振動子３８は、噴出ノズル２３を挟んで２つ設けられている。なお、振動子３８の数はこれに限定するものではない。 Embodiment 6
FIG. 9 is a side sectional view showing a configuration around the ejection nozzle according to the sixth embodiment. As shown in FIG. 9, a vibrator 38 that vibrates the bottom surface of the processing tank 21 is attached to the bottom surface of the processing tank 21. In the example shown in FIG. 9, two vibrators 38 are provided with the ejection nozzle 23 interposed therebetween. The number of vibrators 38 is not limited to this.
　振動子３８は、エアハンマー等で構成され、振動子３８で発生させた振動が処理槽２１の中央部に向かって伝達されるように、処理槽２１の底面に対して傾斜した姿勢で取り付けられている。 The vibrator 38 is composed of an air hammer or the like, and is attached in an inclined posture with respect to the bottom surface of the processing tank 21 so that vibration generated by the vibrator 38 is transmitted toward the center of the processing tank 21. ing.
　ここで、処理槽２１の底面を２つの振動子によって振動させると、処理槽２１内の汚水には、図９に仮想線で示すような、処理槽２１の中央部に斜め上方に向かう２つの波が発生することとなる。２つの振動子３８によって生じた２つの波は、噴出ノズル２３の上方位置で合流する。 Here, when the bottom surface of the processing tank 21 is vibrated by two vibrators, the sewage in the processing tank 21 has two slanting upwards toward the central portion of the processing tank 21 as indicated by a virtual line in FIG. A wave will be generated. The two waves generated by the two vibrators 38 merge at a position above the ejection nozzle 23.
　これにより、噴出ノズル２３から噴出された空気泡は、振動子３８で発生された波に乗って上方に移動することで推進力が与えられ、接触体２２に付着した汚泥の塊を落とし易くなる。 As a result, the air bubbles ejected from the ejection nozzle 23 are propelled by moving upward on the waves generated by the vibrator 38, and it is easy to drop sludge attached to the contact body 22. .
　《その他の実施形態》
　前記実施形態については、以下のような構成としてもよい。 << Other Embodiments >>
About the said embodiment, it is good also as following structures.
　本実施形態では、汚水と空気とを循環配管２５内で混ざり合わせた状態とし、１つの噴出ノズル２３から汚水と空気とを噴出させるようにしたが、この形態に限定するものではない。例えば、汚水を噴出する汚水噴出部と、空気を噴出する空気噴出部とを、それぞれ別体の噴出ノズルで構成するようにしてもよい。 In the present embodiment, sewage and air are mixed in the circulation pipe 25, and the sewage and air are ejected from one ejection nozzle 23. However, the present invention is not limited to this mode. For example, you may make it comprise the sewage ejection part which ejects sewage, and the air ejection part which ejects air by a separate ejection nozzle, respectively.
　また、本実施形態では、接触体２２として糸状固定担体を用いた構成について説明したが、ブロック状固定担体を用いた構成であってもよい。 In the present embodiment, the configuration using the thread-like fixed carrier as the contact body 22 has been described. However, a configuration using a block-like fixed carrier may be used.
　以上説明したように、本発明は、付着した汚泥によって複数の接触体の間の隙間が閉塞するのを抑えることができるという実用性の高い効果が得られることから、きわめて有用で産業上の利用可能性は高い。 As described above, the present invention provides a highly practical effect that can prevent the gaps between the plurality of contact bodies from being blocked by the attached sludge. The possibility is high.
　２０　　一次処理槽（汚水処理装置）
　２１　　処理槽
　２２　　接触体
　２３　　噴出ノズル（汚水噴出部、空気噴出部）
　３０　　ガイド部材（流路規制部）
　３２　　傾斜カバー
　３５　　ガイド部材（流路規制部）
　３６　　縮流部
　３８　　振動子
　Ｄ１，Ｄ２　隙間 20 Primary treatment tank (sewage treatment equipment)
21 treatment tank 22 contact body 23 ejection nozzle (sewage ejection section, air ejection section)
30 Guide member (flow path regulating part)
32 Inclined cover 35 Guide member (flow path regulating part)
36 Constriction part 38 Oscillator D1, D2 Gap

Claims (10)

  1. 　汚泥を含む汚水を処理する汚水処理装置であって、
    　汚水が貯留される処理槽と、
    　前記処理槽内に設けられ、汚泥を付着させる複数の接触体と、
    　前記処理槽内の前記接触体に向かって汚水を噴出する汚水噴出部と、
    　前記処理槽内に空気を噴出する空気噴出部と、
    　前記汚水噴出部から噴出された汚水の流路を規制する流路規制部とを備えたことを特徴とする汚水処理装置。     A sewage treatment apparatus for treating sewage containing sludge,
    A treatment tank in which sewage is stored;
    A plurality of contact bodies provided in the treatment tank, to which sludge is attached;
    A sewage ejection part for ejecting sewage toward the contact body in the treatment tank;
    An air ejection part for ejecting air into the treatment tank;
    A sewage treatment apparatus comprising: a flow path regulating unit that regulates a flow path of sewage ejected from the sewage ejection part.
  2. 　請求項１において、
    　前記汚水噴出部は、前記処理槽の底面側から上方に向かって汚水を噴出するように構成されていることを特徴とする汚水処理装置。     In claim 1,
    The sewage ejection unit is configured to eject sewage upward from the bottom side of the treatment tank.
  3. 　請求項２において、
    　前記流路規制部は、上下方向に延びる筒状に形成され且つ上方に向かうほど先細となったガイド部材で構成されていることを特徴とする汚水処理装置。     In claim 2,
    The said flow path control part is comprised with the guide member which was formed in the cylinder shape extended in an up-down direction, and became tapered as it went upwards.
  4. 　請求項２において、
    　前記流路規制部は、上下方向に延びる筒状に形成され且つ筒内の一部が絞られた縮流部を有するガイド部材で構成されていることを特徴とする汚水処理装置。     In claim 2,
    The sewage treatment apparatus, wherein the flow path restricting portion is formed of a guide member that is formed in a cylindrical shape extending in a vertical direction and has a contracted flow portion in which a part of the inside of the tube is narrowed.
  5. 　請求項３又は４において、
    　前記ガイド部材は、該ガイド部材の外周面と前記処理槽の内周面との間、及び該ガイド部材の下部と該処理槽の底面との間に所定の隙間を存して配設されていることを特徴とする汚水処理装置。     In claim 3 or 4,
    The guide member is disposed with a predetermined gap between the outer peripheral surface of the guide member and the inner peripheral surface of the processing tank, and between the lower portion of the guide member and the bottom surface of the processing tank. A sewage treatment apparatus characterized by comprising:
  6. 　請求項２乃至５のうち何れか１つにおいて、
    　前記汚水噴出部の噴出口は、前記処理槽の底面よりも上方に突出していることを特徴とする汚水処理装置。     In any one of claims 2-5,
    The sewage treatment apparatus according to claim 1, wherein the sewage ejection part has an ejection port that protrudes upward from the bottom surface of the treatment tank.
  7. 　請求項６において、
    　前記汚水噴出部の突出部分の周囲を覆うとともに、前記処理槽の底面から該汚水噴出部の噴出口に向かうほど先細となった傾斜カバーを備えたことを特徴とする汚水処理装置。     In claim 6,
    A sewage treatment apparatus comprising an inclined cover that covers the periphery of the protruding portion of the sewage ejection part and tapers toward the ejection port of the sewage ejection part from the bottom surface of the treatment tank.
  8. 　汚泥を含む汚水を処理する汚水処理装置であって、
    　上下方向に延びる円筒状に形成されて汚水が貯留される処理槽と、
    　前記処理槽内に設けられ、汚泥を付着させる複数の接触体と、
    　前記接触体よりも下方に設けられ、前記処理槽内に汚水を噴出する汚水噴出部と、
    　前記接触体よりも下方に設けられ、前記処理槽内に空気を噴出する空気噴出部とを備え、
    　前記汚水噴出部は、前記処理槽の側壁から該処理槽の内周面に沿うような方向に向かって汚水を噴出するように構成されていることを特徴とする汚水処理装置。     A sewage treatment apparatus for treating sewage containing sludge,
    A treatment tank in which sewage is stored in a cylindrical shape extending in the vertical direction;
    A plurality of contact bodies provided in the treatment tank, to which sludge is attached;
    Provided below the contact body, and a sewage ejection part for ejecting sewage into the treatment tank,
    An air ejection part provided below the contact body and ejecting air into the treatment tank;
    The sewage ejection unit is configured to eject sewage from a side wall of the treatment tank in a direction along the inner peripheral surface of the treatment tank.
  9. 　請求項８において、
    　前記汚水噴出部は、前記処理槽の側壁から該処理槽の内周面に沿うような方向で且つ斜め上方に向かって汚水を噴出するように構成されていることを特徴とする汚水処理装置。     In claim 8,
    The sewage ejection unit is configured to eject sewage from a side wall of the treatment tank in a direction along the inner peripheral surface of the treatment tank and obliquely upward.
  10. 　汚泥を含む汚水を処理する汚水処理装置であって、
    　汚水が貯留される処理槽と、
    　前記処理槽内に設けられ、汚泥を付着させる複数の接触体と、
    　前記接触体よりも下方に設けられ、前記処理槽内に汚水を噴出する汚水噴出部と、
    　前記接触体よりも下方に設けられ、前記処理槽内に空気を噴出する空気噴出部と、
    　前記処理槽の底面を振動させる振動子とを備えたことを特徴とする汚水処理装置。     A sewage treatment apparatus for treating sewage containing sludge,
    A treatment tank in which sewage is stored;
    A plurality of contact bodies provided in the treatment tank, to which sludge is attached;
    Provided below the contact body, and a sewage ejection part for ejecting sewage into the treatment tank,
    An air ejection part provided below the contact body and ejecting air into the treatment tank;
    A sewage treatment apparatus, comprising: a vibrator that vibrates a bottom surface of the treatment tank.
PCT/JP2017/022007 2017-06-14 2017-06-14 Waste water treatment device WO2018229912A1 (en)

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