WO1992009533A1 - Sewage purifying device of filter material circulation type - Google Patents

Sewage purifying device of filter material circulation type Download PDF

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Publication number
WO1992009533A1
WO1992009533A1 PCT/JP1990/001514 JP9001514W WO9209533A1 WO 1992009533 A1 WO1992009533 A1 WO 1992009533A1 JP 9001514 W JP9001514 W JP 9001514W WO 9209533 A1 WO9209533 A1 WO 9209533A1
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WO
WIPO (PCT)
Prior art keywords
filter
septic tank
filter medium
circulation path
sewage purification
Prior art date
Application number
PCT/JP1990/001514
Other languages
French (fr)
Japanese (ja)
Inventor
Isamu Iwai
Chikatsu Nirasawa
Original Assignee
Isamu Iwai
Chikatsu Nirasawa
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 Isamu Iwai, Chikatsu Nirasawa filed Critical Isamu Iwai
Priority to EP19910900355 priority Critical patent/EP0558745A4/en
Priority to PCT/JP1990/001514 priority patent/WO1992009533A1/en
Priority to AU67333/90A priority patent/AU647055B2/en
Priority to KR1019930701467A priority patent/KR960001397B1/en
Priority to CA002096523A priority patent/CA2096523A1/en
Priority to US08/050,362 priority patent/US5387335A/en
Priority claimed from CA002096523A external-priority patent/CA2096523A1/en
Publication of WO1992009533A1 publication Critical patent/WO1992009533A1/en

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Classifications

    • 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
    • C02F3/085—Fluidized beds
    • C02F3/087—Floating beds with contact bodies having a lower density than water
    • 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
    • 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 purification apparatus using a buoyant filter medium, particularly a large buoyant filter medium having a diameter of several cm to several centimeters, for purifying a large-scale capacity, for example, for purifying river water.
  • the present invention relates to an improvement of a sewage purification device suitable for the wastewater treatment.
  • a sewage purification system that uses a large filter medium is a filter tank that contains a large number of buoyant filter media in a septic tank and forms a filter bed, which is a collection of filter media, and this filter bed contains aerobic bacteria or anaerobic bacteria for purification treatment.
  • the bacterium proliferates, and the sewage gradually flows from the upstream to the downstream of the septic tank while coming into contact with the filter medium of the filter bed, so that the wastewater can be gradually treated.
  • pre-purification is rather complicated.
  • pre-cleaning cannot merely prevent the clogging itself, because it can only delay the progress of clogging, and in the end, it is a very difficult task to remove the filter media. Cleaning or replacement must be performed regularly.
  • the present invention has been made on the background of such a conventional situation, so that the treated water that is being purified by passing through the filter bed is not adversely affected.
  • the objective is to provide a sewage purification device that effectively prevents clogging of filter media and always enables efficient purification.
  • a large number of buoyant filter media are accommodated in a septic tank to form a filter bed, which is a collection of filter media, and the sewage flows down from the upstream side of the septic tank to the downstream side to contact the filter bed.
  • a means for moving the filter media from the most downstream part to the most upstream part of the septic tank is provided, and a vortex is formed in the most upstream part of the septic tank.
  • a first water flow forming means and a second water flow forming means for forming a direct stream and the filter medium taken out of the filter bed at the most downstream part of the septic tank is moved to the most upstream part of the septic tank by the moving means.
  • This is achieved by a filter medium circulation type sewage purification apparatus in which the filter medium moved to the uppermost stream is returned to the filter bed from the bottom of the filter bed by a vortex by the first water stream forming means and a direct stream by the second water stream forming means.
  • This device can effectively prevent clogging if the filter media is constantly moving, but simply moving the filter media randomly causes the sludge that separates from the filter media to diffuse into the septic tank with this random movement. It is based on the knowledge that purification efficiency is reduced.
  • the apparatus effectively prevents the filter medium from being clogged and enables always efficient purification.
  • the filter media is circulated by continuous repetition of taking out the filter media from the most downstream portion and returning the media to the filter bed at the most upstream portion, and at the same time, the filter bed moves as if the glacier moves. Flows gently like this, effectively preventing filter media from clogging. Further, when the filter medium returns to the filter bed at the uppermost stream portion, the filter medium performs a rotary motion on the vortex generated by the first water flow forming means, so that the filter medium can be efficiently washed by the rotary motion.
  • the movement of the filter media that separates the sludge is essentially limited to the uppermost stream of the septic tank, that is, the portion of the raw water that has not been treated yet and that has no adverse effect even if the sludge is separated from the filter media. Therefore, the reduction of purification efficiency due to diffusion of separated sludge can be avoided.
  • a more rational design is possible if a water stream is used as a means of moving the filter media. That is, a circulation path is attached to the septic tank, a water flow communicating with the inside of the purification tank is formed from the most downstream part to the most upstream part in the circulation path, and the filter medium is moved on the water flow in the circulation path. Then, it is possible to more effectively and efficiently take out the filter medium from the filter bed, and it is also possible to reduce failure elements of the moving means.
  • a separating means is provided in the circulation path, and the separation means can separate sludge from the filter medium. By doing so, the effect of the sludge separating from the filter medium on the treated water can be further reduced, and the purification efficiency of the wastewater can be further increased.
  • a vortex formed there can be used.
  • Such a separation means has an extremely simple structure but is efficient.
  • the septic tank may have a folded structure in which the upstream end and the downstream end are adjacent to each other. Such a folded structure can improve the installation space efficiency in the case of a long septic tank.
  • a conveyor having a driving force can be used as the moving means.
  • FIG. 1 is a schematic perspective view of a filter material circulation type sewage purification apparatus according to a first embodiment of the present invention, including a partial cutaway.
  • FIG. 2 is a schematic plan view seen from the direction of the arrow in FIG.
  • FIG. 3 is a schematic cross-sectional view taken along line II-IE in FIG.
  • FIG. 4 is a schematic sectional view taken along the line IV-IV in FIG.
  • FIG. 5 is a schematic sectional view taken along the line VV in FIG.
  • FIG. 6 is a schematic sectional view corresponding to FIG. 4 of a filter medium circulation type wastewater purification apparatus according to a second embodiment.
  • FIG. 7 is a schematic plan view of a filter material circulation type sewage purification apparatus according to a third embodiment.
  • FIG. 8 is a schematic cross-sectional view taken along the arrow line- ⁇ in FIG.
  • each of the embodiments described below relates to an aeration type, but the present invention is not limited to the aeration type and can be used for an anaerobic type.
  • a filter medium circulation type wastewater purification apparatus 1 of this embodiment is formed by a purification tank 2 filled with a filter medium A and a circulating means 3 for circulating the filter medium A in the purification tank 2. Have been.
  • the septic tank 2 is filled with the filter medium A.
  • the filter medium A has a buoyancy, that is, for example, about 0.95 to 0.98, which is slightly lower than the specific gravity of sewage, and is appropriate. It is necessary to have the property of being able to float in water with the buoyancy of the water, and the property of not being entangled with each other.
  • the filter medium A is preferably a sphere having a diameter of about 10 cm, preferably 10 to 12 cm, and formed of a large number of frames so as to obtain a larger surface area.
  • the spherical filter medium disclosed in the above-mentioned Japanese Patent No. 1344302 (patent publication No. 24440 of 1986) is most suitable.
  • the septic tank 2 is an elongated rectangular parallelepiped with a size of, for example, 6 Om in length and 3 Om in width, and is provided with a sewage inlet 5 at the upper part of the side wall 2 a on the upstream side and a partition on the downstream side.
  • a purified water discharge pit 7 formed by partitioning the corners with a plate 6 is provided. Then, the sewage flowing from the sewage inlet 5 flows gently toward the downstream side while coming into contact with the filter bed B, during which it undergoes purification treatment by the filter bed B, and becomes treated water at the downstream side. The water enters the purified water discharge pit 7 through a large number of through holes 8, 8, 1, ... provided in the partition plate 6, from which the water is pumped up and discharged.
  • the partition plate 6 for the water purification pit 7 also serves to eliminate blind spots in the "movement" behind the filter media A to B.
  • the circulating means 3 continuously performs a work of returning the filter medium A taken out of the filter bed B at the most downstream part of the septic tank 2 to the filter bed B at the most upstream part, thereby moving the filter medium A cyclically. This is to make the filter bed B flow gently like the movement of a glacier from the upstream side to the downstream side as a whole, and the clogging of the filter medium A is effective by the flow of the filter bed B obtained by this. Is prevented.
  • the circulating means 3 includes a circulating path 9, a moving water flow forming means 10, a first water flow forming means 11, and a second water flow forming means 12.
  • the circulation path 9 is one of moving means for moving the filter medium A from the downstream side to the upstream side, and has a width W slightly larger than the diameter of the filter medium A and a depth substantially equal to the depth of the septic tank 2.
  • One end is connected to the inside of the septic tank 2 via the intake 13 at the most downstream part, and the other end is connected to the septic tank via the discharge port 14 at the most upstream part. Communicates within 2.
  • the intake 13 is formed by cutting off the upper part of the side wall 2 b of the septic tank 2.
  • the depth D from the water surface is about 2 to 3 times the diameter of the filter material A.
  • the combination of the size of the intake 13 and the width of the circulation path 9 allows the filter medium A to be taken into the circulation path 9 one by one or several pieces from the upper part of the filter bed B.
  • the discharge port 14 is provided at the downstream end of the circulation path 9 so as to communicate with the inside of the purification tank 2 within the minimum necessary for returning the filter medium A into the purification tank 2.
  • the filter medium A is provided above the partition wall 14 w provided at the downstream end of the circulation path 9 at a height of about two to three times the diameter of the filter medium A.
  • a triangular prism-shaped guide plate 15 is provided adjacent to the discharge port 14 in order to eliminate blind spots in the movement of the filter media A to the filter bed B.
  • the moving water flow forming means 10 is for forming a water flow flowing from the downstream side to the upstream side of the septic tank 2 in the circulation path 9, and a pump (not shown) for supplying treated water from the purified water discharge pit 6.
  • the filter medium A taken in from the intake port 13 rides on the water flow formed by the moving water flow forming means 10, whereby the water is moved from the most downstream part to the most upstream part of the purification tank 2.
  • the filter medium A may form a pledge near the intake port 13 depending on the force conditions that naturally enter the circulation path 9 even if it is natural. Therefore, it is preferable to provide an appropriate means such as a gently rotating impeller in the intake port 13 to force the filter medium A into the circulation path 9.
  • the moving water flow forming means 10 is parallel to both the length direction and the depth direction of the circulation path 9 by setting the ejection power and the height of the ejection port 10 n under predetermined conditions.
  • a vortex 16 in the direction can be formed.
  • this whirlpool 16 converts sludge from filter medium A It serves as separating means for separating. That is, the filter medium A traveling in the circulation path 9 on the water stream is rotated on the vortex stream 16 to remove the attached sludge and to be washed.
  • the sludge separated from the filter material A is collected at the sludge pit 17 along the inclined floor of the circulation path 9 and is recovered therefrom by a pump (not shown).
  • the moving means is not limited to such a means.
  • a conveyor with a driving force may be used, and an appropriate separation means may be provided in the middle of the conveyor as necessary.
  • the purpose can be sufficiently achieved only by a circulation path having a depth at which the filter medium A can move in a row, and when such a circulation path is provided, for example, it is formed in advance.
  • a concrete pipe or the like may be attached to the septic tank.
  • the separating means when the separating means is provided in the circulation path 9, the treated water is not adversely affected by the sludge separated from the filter medium, and the purification efficiency can be further improved.
  • the vortex 16 as described above, it is possible to use a very simple structure and an efficient separating means. However, basically, as described above, the clogging of the filter medium A can be sufficiently prevented by the flow of the filter bed B. Therefore, it is not always necessary to provide such separation means, and the separation means is provided. However, other appropriate means can be adopted regardless of the vortex 16.
  • the first water flow forming means 1 I is a part of the means for returning the filter medium A moved by the circulation path 9 to the filter bed B, and is the uppermost stream portion of the septic tank 2, specifically, the circulation path 9. Is provided in close proximity to the discharge port 14.
  • a vortex 18 is formed in a direction crossing the direction and in a direction parallel to the depth direction of the septic tank 2. The vortex 18 is filled with the filter medium A at the discharge port 14 of the circulation path 9 and rotates to form a pre-stage state for returning to the filter bed B.
  • the filter medium A is washed by the rotational movement on the vortex 18 in the same manner as in the circulation path 9 described above, and clogging of the filter medium A is more effectively prevented.
  • the sludge separated from the filter medium A collects in the sludge pit 19 along the inclined floor in the same manner as in the case of the circulation path 9, and is collected therefrom by a pump (not shown).
  • the second water flow forming means 12 is for returning the filter medium A rotating and riding on the vortex 18 generated by the first water flow forming means 11 to the filter bed B.
  • a corner portion defined by a guide plate 21 for eliminating a blind spot is provided so as to face diagonally to the first water flow forming means 11.
  • the second water flow forming means 12 similarly ejects the treated water drawn from the purified water discharge pit 6 from the corner of the uppermost stream of the septic tank 2 to the downstream side of the septic tank 2.
  • a straight direct stream 20 is formed which is injected obliquely. Then, the filter medium A in the vortex 18 is returned to the bottom of the filter bed B so that the filter medium A is swept off by the direct stream 20.
  • the bottom of the septic tank 2 is provided with a roster to prevent the filter medium A from sinking to the bottom when water is drained, etc., and an aeration pipe for supplying air for aeration is provided. Since it is known, its illustration is omitted. Also, for simplicity in the figure, The size ratio between the septic tank 2 and the filter material A and other members is appropriately changed.
  • this embodiment is an example in which a separation means by a vortex 16 is provided at a plurality of places in the circulation path 9, and is suitable for a case where the septic tank becomes long.
  • the septic tank 32 is of a folded type.
  • the partition wall 33 is provided at the center to form a U-shaped passage, so that the upstream end and the downstream end are adjacent to each other.
  • Such a structure is suitable when the septic tank is long, and the installation space can be used efficiently.
  • a conveyor 34 extending between adjacent upstream and downstream ends may be provided as a moving means. Then, the filter medium A is transferred from the downstream end to the upstream end by the conveyor 34, and the filter medium A is filtered by the first water flow forming means 11 and the second water flow forming means 12 as in the case of the first embodiment. By returning to the bottom of the floor B, the same effect as in the first embodiment can be obtained.
  • the filter medium circulating sewage purification apparatus since the filter medium is circulated by the circulating means so as to give a quiet flow to the filter bed, clogging of the filter medium can be effectively prevented. Further, since the sludge is separated from the filter medium by utilizing such a circulation of the filter medium, clogging of the filter medium can be more effectively prevented. In addition, since such clogging is prevented without adversely affecting the treated water being purified, the efficiency of the filtration media type wastewater purification is greatly improved. Can contribute.

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  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
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Abstract

This invention relates to a sewage purifying device using large size floatable filter materials and is intended for effectively preventing said filter materials from being clogged. The purpose is satisfied by imparting very gentle fluidity to the whole of a filter bed while circulating filter materials with circulating means and further effectively achieved by exfoliating sludge from filter materials while utilizing the circulatory movement of filter materials.

Description

明 細 書  Specification
濾材循環式汚水浄化装置  Filter media circulation type sewage purification system
〔技術分野〕 〔Technical field〕
この発明は、 浮遊性の濾材、 特に数 c m〜" h数 c mの直径を有 する大型の浮遊性濾材を用いた汚水浄化装置で、 例えば河川水の 浄化のように大規模容量の浄化を行うのに好適な汚水浄化装置の 改良に関する。  The present invention relates to a sewage purification apparatus using a buoyant filter medium, particularly a large buoyant filter medium having a diameter of several cm to several centimeters, for purifying a large-scale capacity, for example, for purifying river water. The present invention relates to an improvement of a sewage purification device suitable for the wastewater treatment.
〔背景技術〕  (Background technology)
大型の濾材を用いた汚水浄化装置というのは、 浄化槽内に浮遊 性の濾材を多数個収容して濾材の集合である濾床を形成し、 この 濾床に浄化処理用の好気性細菌あるいは嫌気性細菌を繁殖させる ようにしたもので、 汚水が濾床の濾材に接触しつつ浄化槽の上流 から下流に向けて緩やかに流れることにより徐々に浄化処理を受 けるようになつている。  A sewage purification system that uses a large filter medium is a filter tank that contains a large number of buoyant filter media in a septic tank and forms a filter bed, which is a collection of filter media, and this filter bed contains aerobic bacteria or anaerobic bacteria for purification treatment. The bacterium proliferates, and the sewage gradually flows from the upstream to the downstream of the septic tank while coming into contact with the filter medium of the filter bed, so that the wastewater can be gradually treated.
ところが、 濾材として大型のものを用いる従来の浄化装置では、 濾床が固定的であつたため、 一定の処理量をこなすと各濾材ぁる いは濾材同士間に汚泥による目詰まりが生じ、 その後の浄化能力 の低下を来すという問題がある。 これに対処するには浄化装置内 の全濾材を交換するか、 あるいは全濾材を洗浄して浄化装置のォ ーバホールを定期的に行うことになるが、 この結果、 浄化装置の 運転コストが大きく増大してしまう。  However, in a conventional purification device that uses a large filter medium, the filter bed is fixed, so if a certain amount of treatment is performed, clogging due to sludge occurs between each filter medium or between the filter media. There is a problem that the purification capacity is reduced. To cope with this, all the filter media in the purifier must be replaced, or all the filter media must be cleaned and overhauled in the purifier periodically. As a result, the operating cost of the purifier increases significantly. Resulting in.
他方、 瀘材自体を工夫して目詰まりを生じ難く し、 あるいはあ る程度まで予備浄化して濃度を下げた汚水を処理するようにして 瀘材の目詰まり自体を予防する方法もある。  On the other hand, there is also a method of preventing clogging of the filter medium by devising the filter medium itself to prevent clogging, or treating sewage with a reduced concentration by preliminarily purifying to a certain extent.
しかし、 予備浄化の方法は、 予備浄化自体が相当に面倒なもの であるし、 また予備浄化しても単に目詰まりの進行を遅らせるこ とができるというだけで、 目詰まり自体の完全な防止は不可能で あり、 結局、 非常に大変な作業である瀘材の洗浄乃至交換を定期 的に行わざるを得ない。 However, the method of pre-purification is rather complicated. In addition, pre-cleaning cannot merely prevent the clogging itself, because it can only delay the progress of clogging, and in the end, it is a very difficult task to remove the filter media. Cleaning or replacement must be performed regularly.
また、 例えば日本国特許第 1 3 4 3 0 3 2号 （特許公告昭和 6 1年第 2 4 4 0号） に見られる、 浮遊性であり且つお互いが絡ま り難いようになっている球形の瀘材のように、 瀘材自体の工夫に より、 それ自体に相当な目詰まり抑制能力を与えることができる ものの、 結局、 目詰まりの完全防止には不十分である。  In addition, for example, a spherical shape that is floatable and hard to be entangled with each other, as shown in Japanese Patent No. 1344302 (Patent Publication No. 24440 of 1961). Like filter media, the filter media itself can provide considerable clogging control capabilities, but is ultimately insufficient to completely prevent clogging.
このような従来の事情を背景にしてなされたのがこの発明で、 濾床を通過することにより浄化されつつある処理水に悪影響を与 えることのないよにして、 つまり瀘材の動きによる濾材からの剝 離污泥が処理済水の中に広がることのないようにして、 濾材の循 環動及び瀘床の静かな流動を与え、 さらにこの循環動を利用して 瀘材を洗浄することにより、 瀘材の目詰まりを有効に防止し、 常 に効率的な浄化を可能とする汚水浄化装置の提供を目的としてい o  The present invention has been made on the background of such a conventional situation, so that the treated water that is being purified by passing through the filter bed is not adversely affected. Provide a circulation of the filter medium and a gentle flow of the filter bed by preventing the separation mud from the water from spreading into the treated water, and use the circulation to wash the filter medium. The objective is to provide a sewage purification device that effectively prevents clogging of filter media and always enables efficient purification.
〔発明の開示〕  [Disclosure of the Invention]
このような目的は、 浄化槽内に浮遊性の濾材を多数個収容して 瀘材の集合である瀘床を形成し、 汚水を、 浄化槽の上流側より下 流側に流下させて瀘床と接触させつつ、 瀘床で繁殖した細菌によ り浄化処理する汚水浄化装置に於いて、 浄化槽の最下流部から最 上流部へ濾材を移動させる移動手段を備えると共に、 浄化槽の最 上流部に渦流形成用の第 1水流形成手段及び直射流形成用の第 2 水流形成手段を備え、 そして浄化槽の最下流部において瀘床中よ り取り出した濾材を移動手段にて浄化槽の最上流部に移動せしめ、 この最上流部に移動せしめられた濾材を第 1水流形成手段による 渦流及び第 2水流形成手段による直射流にて濾床の底部から濾床 に戻すようにした濾材循環式汚水浄化装置より達成される。 For this purpose, a large number of buoyant filter media are accommodated in a septic tank to form a filter bed, which is a collection of filter media, and the sewage flows down from the upstream side of the septic tank to the downstream side to contact the filter bed. In a sewage purification system that purifies bacteria with bacteria that have propagated on the filter bed, a means for moving the filter media from the most downstream part to the most upstream part of the septic tank is provided, and a vortex is formed in the most upstream part of the septic tank. A first water flow forming means and a second water flow forming means for forming a direct stream, and the filter medium taken out of the filter bed at the most downstream part of the septic tank is moved to the most upstream part of the septic tank by the moving means. This is achieved by a filter medium circulation type sewage purification apparatus in which the filter medium moved to the uppermost stream is returned to the filter bed from the bottom of the filter bed by a vortex by the first water stream forming means and a direct stream by the second water stream forming means. You.
この装置は、 濾材が常に動いていれば目詰まりを有効に防止で きるが、 他方濾材を単に無秩序に動かしたのではこの無秩序な動 きに連れて濾材から剥離する汚泥が浄化槽内に拡散してしまい、 浄化効率の低下を来してしまうという知見に基づく ものである。  This device can effectively prevent clogging if the filter media is constantly moving, but simply moving the filter media randomly causes the sludge that separates from the filter media to diffuse into the septic tank with this random movement. It is based on the knowledge that purification efficiency is reduced.
そして、 この装置は、 前記のような知見が要求する濾材の恒常 的且つ秩序的な動きを効率よく達成することにより、 濾材の目詰 まりを有効に防止し、 常に効率的な浄化を可能とするものである すなわち、 この装置では、 濾材の最下流部からの取出しと最上 流部における瀘床への戻しとの継続的な繰返しにより、 濾材が循 環動すると共に濾床があたかも氷河の動きのように静かに流動し、 濾材の目詰まりが有効に防止される。 また、 濾材が最上流部で濾 床に戻る際に第 1水流形成手段による渦流に乗って回転運動を行 うようになっているので、 この回転運動により瀘材の洗浄も効率 よく行える。 しかも、 汚泥が刹離するような濾材の動きは実質的 に浄化槽の最上流部、 つまり未だ処理を受けていない原水の部位 であり濾材から汚泥が剥離しても悪影響のない部位に限られるの で、 剝離汚泥の拡散による浄化効率の低下を招かずに済む。  And, by efficiently achieving the constant and orderly movement of the filter medium required by the above knowledge, the apparatus effectively prevents the filter medium from being clogged and enables always efficient purification. In other words, in this device, the filter media is circulated by continuous repetition of taking out the filter media from the most downstream portion and returning the media to the filter bed at the most upstream portion, and at the same time, the filter bed moves as if the glacier moves. Flows gently like this, effectively preventing filter media from clogging. Further, when the filter medium returns to the filter bed at the uppermost stream portion, the filter medium performs a rotary motion on the vortex generated by the first water flow forming means, so that the filter medium can be efficiently washed by the rotary motion. In addition, the movement of the filter media that separates the sludge is essentially limited to the uppermost stream of the septic tank, that is, the portion of the raw water that has not been treated yet and that has no adverse effect even if the sludge is separated from the filter media. Therefore, the reduction of purification efficiency due to diffusion of separated sludge can be avoided.
濾材の移動手段として水流を用いると、 より合理的な設計が可 能である。 すなわち、 浄化槽に循環路を付設し、 この循環路内に 浄化槽内と連通する水流を最下流部から最上流部に向けて形成し、 この循環路内の水流に乗せて濾材を移動させるようにすれば、 濾 床中からの濾材の取出しをより有効に且つ効率的に行え、 また移 動手段の故障的要素を少なくすることもできる。 循環路内の水流を用いて濾材を移動させる場合には、 この循環 路内に剥離手段を設け、 この剝離手段により瀘材から汚泥を剝離 させることができる。 このようにすると、 濾材から剝離する汚泥 の処理水への影響をより少なくでき、 汚水の浄化効率をより一層 高めることができる。 A more rational design is possible if a water stream is used as a means of moving the filter media. That is, a circulation path is attached to the septic tank, a water flow communicating with the inside of the purification tank is formed from the most downstream part to the most upstream part in the circulation path, and the filter medium is moved on the water flow in the circulation path. Then, it is possible to more effectively and efficiently take out the filter medium from the filter bed, and it is also possible to reduce failure elements of the moving means. When the filter medium is moved using the water flow in the circulation path, a separating means is provided in the circulation path, and the separation means can separate sludge from the filter medium. By doing so, the effect of the sludge separating from the filter medium on the treated water can be further reduced, and the purification efficiency of the wastewater can be further increased.
循環路内の剝離手段としては、 そこに形成した渦流を用いるこ とができ、 このような剝離手段は、 極めて簡単な構造でありしか も効率がよい。  As the separation means in the circulation path, a vortex formed there can be used. Such a separation means has an extremely simple structure but is efficient.
浄化槽は、 上流端と下流端とが相隣接する折り返し構造とする こともできる。 このような折り返し構造は、 長大な浄化槽の場合 に設置空間の効率性を図れる。  The septic tank may have a folded structure in which the upstream end and the downstream end are adjacent to each other. Such a folded structure can improve the installation space efficiency in the case of a long septic tank.
移動手段としては、 前記の水流を用いたものの他にも、 駆動力 を備えたコンべャを用いることもできる。  As the moving means, in addition to the means using the water flow, a conveyor having a driving force can be used.
〔図面の簡単な説明〕  [Brief description of drawings]
第 1図は、 本発明の第 1実施例による瀘材循環式汚水浄化装置 の一部破断を含む概略斜視図。  FIG. 1 is a schematic perspective view of a filter material circulation type sewage purification apparatus according to a first embodiment of the present invention, including a partial cutaway.
第 2図は、 第 1図中の矢示 Π方向から見た概略平面図。  FIG. 2 is a schematic plan view seen from the direction of the arrow in FIG.
第 3図は、 第 1図中の矢示 ΙΠ - IE線に沿う概略断面図。  FIG. 3 is a schematic cross-sectional view taken along line II-IE in FIG.
第 4図は、 第 1図中の矢示 IV - IV線に沿う概略断面図。  FIG. 4 is a schematic sectional view taken along the line IV-IV in FIG.
第 5図は、 第 1図中の矢示 V - V線に沿う概略断面図。  FIG. 5 is a schematic sectional view taken along the line VV in FIG.
第 6図は、 第 2実施例による濾材循環式汚水浄化装置の第 4図 相当の概略断面図。  FIG. 6 is a schematic sectional view corresponding to FIG. 4 of a filter medium circulation type wastewater purification apparatus according to a second embodiment.
第 7図は、 第 3実施例による瀘材循環式汚水浄化装置の概略平 面図。  FIG. 7 is a schematic plan view of a filter material circulation type sewage purification apparatus according to a third embodiment.
第 8図は、 第 7図中の矢示珊 - ¾線に沿う概略断面図。  FIG. 8 is a schematic cross-sectional view taken along the arrow line-矢 in FIG.
〔発明を実施するための形態〕 以下、 本発明の実施例を説明する。 [Mode for Carrying Out the Invention] Hereinafter, examples of the present invention will be described.
尚、 以下の各実施例の説明においては、 各実施例に共通する部 分には同一符号を用い、 重複する説明は適宜省略している。  In the following description of each embodiment, the same reference numerals are used for parts common to each embodiment, and duplicate description is omitted as appropriate.
また、 以下で説明する各実施例は何れも曝気式に関するもので あるが、 この発明は曝気式に限られず、 嫌気式にも用いることが できる。  Further, each of the embodiments described below relates to an aeration type, but the present invention is not limited to the aeration type and can be used for an anaerobic type.
第 1実施例  First embodiment
この実施例の濾材循環式汚水浄化装置 1 は、 第 1図に示すよう に、 瀘材 Aが充塡された浄化槽 2と、 浄化槽 2中の濾材 Aを循環 させるための循環手段 3とで形成されている。  As shown in FIG. 1, a filter medium circulation type wastewater purification apparatus 1 of this embodiment is formed by a purification tank 2 filled with a filter medium A and a circulating means 3 for circulating the filter medium A in the purification tank 2. Have been.
浄化槽 2には濾材 Aが充填されているが、 この濾材 Aは、 後述 の説明から判るように、 浮遊性、 つまり例えば 0. 9 5〜0. 9 8程 度と汚水よりやや比重が小さく適度の浮力で水中を浮遊可能とす る性質を備え、 且つお互い同士が絡まり合わないという性質を備 えている必要がある。 また、 濾材 Aは、 1 0 c m前後で好ましく は 1 0〜 1 2 c mの直径を持つ球形状で、 しかもより多くの表面 積が得られるように多数のフレームで形成されたものが好ましい。 このような特性を持つ濾材 Aとしては、 前述した日本国特許第 1 3 4 3 0 3 2号 （特許公告昭和 6 1年第 2 4 4 0号） に示される 球形の濾材が最適である。  The septic tank 2 is filled with the filter medium A. As will be understood from the description below, the filter medium A has a buoyancy, that is, for example, about 0.95 to 0.98, which is slightly lower than the specific gravity of sewage, and is appropriate. It is necessary to have the property of being able to float in water with the buoyancy of the water, and the property of not being entangled with each other. The filter medium A is preferably a sphere having a diameter of about 10 cm, preferably 10 to 12 cm, and formed of a large number of frames so as to obtain a larger surface area. As the filter medium A having such characteristics, the spherical filter medium disclosed in the above-mentioned Japanese Patent No. 1344302 (patent publication No. 24440 of 1986) is most suitable.
このような濾材 Aは、 浄化槽 2内に充填すると、 その浮遊性故 に、 汚水の水面 Mから下方に向けて充塡状態となり、 瀘材 Aの集 合である濾床 Bを形成する。 そして、 この濾床 Bで繁殖する好気 性細菌により汚水の浄化が行われる。 瀘材 Aの充塡量としては、 浄化槽 2内の汚水収体積に対し 5 5〜 6 0 %となるようにするの が好ましい。 浄化槽 2は、 例えば縦が 6 O mで横が 3 O mというようなサイ ズの細長い直方体状で、 上流側の側壁 2 aの上部に汚水流入口 5 が設けられ、 また下流側には仕切り板 6で角部を仕切ることによ り形成された浄水排出ピッ ト 7が設けられている。 そして、 汚水 流入口 5から流入した汚水は、 濾床 Bに接触しつつ下流側に向か つて緩やかに流れて行き、 その間に瀘床 Bによる浄化処理を受け- 下流側においては処理済水となり、 仕切り板 6に設けられている 多数の通孔 8、 8、 一… -から浄水排出ピッ ト 7に入り、 そこから ポンプアップして排出される。 尚、 浄水排出ピッ ト 7用の仕切り 板 6は濾材 A乃至瀘床 Bの後逑する "動き" についての死角を無 くすための役目も負っている。 When such a filter medium A is filled in the septic tank 2, because of its floating properties, the medium is filled downward from the water surface M of the sewage to form a filter bed B, which is a collection of the filter medium A. Then, sewage is purified by the aerobic bacteria that propagate on the filter bed B. It is preferable that the filling amount of the filter material A is 55 to 60% with respect to the volume of collected sewage in the septic tank 2. The septic tank 2 is an elongated rectangular parallelepiped with a size of, for example, 6 Om in length and 3 Om in width, and is provided with a sewage inlet 5 at the upper part of the side wall 2 a on the upstream side and a partition on the downstream side. A purified water discharge pit 7 formed by partitioning the corners with a plate 6 is provided. Then, the sewage flowing from the sewage inlet 5 flows gently toward the downstream side while coming into contact with the filter bed B, during which it undergoes purification treatment by the filter bed B, and becomes treated water at the downstream side. The water enters the purified water discharge pit 7 through a large number of through holes 8, 8, 1, ... provided in the partition plate 6, from which the water is pumped up and discharged. The partition plate 6 for the water purification pit 7 also serves to eliminate blind spots in the "movement" behind the filter media A to B.
循環手段 3は、 浄化槽 2の最下流部で濾床 Bから取り出した濾 材 Aを最上流部で濾床 Bに戻すという作業を継続的に行って瀘材 Aを循環的に動かすことにより、 瀘床 Bを全体的に上流側から下 流側に向けてあたかも氷河の動きのような静かに流動させるため のもので、 これにより得られる濾床 Bの流動により濾材 Aの目詰 まりが有効に防止される。 そのために循環手段 3は、 循環路 9、 移動用水流形成手段 1 0、 第 1水流形成手段 1 1及び第 2水流形 成手段 1 2より構成されている。  The circulating means 3 continuously performs a work of returning the filter medium A taken out of the filter bed B at the most downstream part of the septic tank 2 to the filter bed B at the most upstream part, thereby moving the filter medium A cyclically. This is to make the filter bed B flow gently like the movement of a glacier from the upstream side to the downstream side as a whole, and the clogging of the filter medium A is effective by the flow of the filter bed B obtained by this. Is prevented. For this purpose, the circulating means 3 includes a circulating path 9, a moving water flow forming means 10, a first water flow forming means 11, and a second water flow forming means 12.
循環路 9は、 瀘材 Aを下流側より上流側に移動させるための移 動手段の一つで、 濾材 Aの直径よりやや広い程度の幅 Wと浄化槽 2の深さと略同じ深さを持つものとして浄化槽 2の側面に付設さ れており、 一端が最下流部において取り込み口 1 3を介して浄化 槽 2内に連通し、 また他端が最上流部において放出口 1 4を介し て浄化槽 2内に連通している。 取り込み口 1 3は、 浄化槽 2の側 壁 2 bの上部を一部切り取つたような状態で形成されたもので、 その水面からの深さ Dは瀘材 Aの直径の 2〜 3倍程度とされてい る。 つまり、 この取り込み口 1 3のサイズと前述の循環路 9の幅 サイズとの組合せにより、 濾床 Bの上部から濾材 Aを 1〜数個ず つ循環路 9に取り込めるようになつている。 他方、 放出口 1 4は. 濾材 Aの浄化槽 2内への戻りに必要最小限の範囲で浄化槽 2内に 連通するようにして循環路 9の下流側端に設けられている。 具体 的には、 循環路 9の下流側端に設けた仕切り壁 1 4 wの上方に瀘 材 Aの直径の 2〜 3倍程度の高さで設けられている。 また、 放出 口 1 4には、 濾材 A乃至濾床 Bの動きについての死角を無くすた めに、 三角柱状のガイ ド板 1 5が隣接させて設けられている。 The circulation path 9 is one of moving means for moving the filter medium A from the downstream side to the upstream side, and has a width W slightly larger than the diameter of the filter medium A and a depth substantially equal to the depth of the septic tank 2. One end is connected to the inside of the septic tank 2 via the intake 13 at the most downstream part, and the other end is connected to the septic tank via the discharge port 14 at the most upstream part. Communicates within 2. The intake 13 is formed by cutting off the upper part of the side wall 2 b of the septic tank 2. The depth D from the water surface is about 2 to 3 times the diameter of the filter material A. That is, the combination of the size of the intake 13 and the width of the circulation path 9 allows the filter medium A to be taken into the circulation path 9 one by one or several pieces from the upper part of the filter bed B. On the other hand, the discharge port 14 is provided at the downstream end of the circulation path 9 so as to communicate with the inside of the purification tank 2 within the minimum necessary for returning the filter medium A into the purification tank 2. Specifically, the filter medium A is provided above the partition wall 14 w provided at the downstream end of the circulation path 9 at a height of about two to three times the diameter of the filter medium A. In addition, a triangular prism-shaped guide plate 15 is provided adjacent to the discharge port 14 in order to eliminate blind spots in the movement of the filter media A to the filter bed B.
移動用水流形成手段 1 0は、 浄化槽 2の下流側から上流側に向 けて流れる水流を循環路 9に形成するためのもので、 浄水排出ピ ッ ト 6から処理済水を図示せぬポンプにて循環路 9に噴出させる ようにしてなるものである。 そして、 この移動用水流形成手段 1 0にて形成された水流に取り込み口 1 3から取り込まれた濾材 A が乗ることにより浄化槽 2の最下流部から最上流部へ移動せしめ られる。 尚、 浄化槽 2に連通する取り込み口 1 3にも水流の影響 がおよぶので濾材 Aは自然でも循環路 9内に入って来る力 条件 によっては取り込み口 1 3近辺でプリジを形成する場合があるの で、 例えば緩やかに回転する羽根車のような適宜の手段を取り込 み口 1 3に設け、 これにより強制的に濾材 Aを循環路 9内に送り 込むようにすることが好ましい。  The moving water flow forming means 10 is for forming a water flow flowing from the downstream side to the upstream side of the septic tank 2 in the circulation path 9, and a pump (not shown) for supplying treated water from the purified water discharge pit 6. At the circulation path 9. Then, the filter medium A taken in from the intake port 13 rides on the water flow formed by the moving water flow forming means 10, whereby the water is moved from the most downstream part to the most upstream part of the purification tank 2. In addition, since the water flow also affects the intake port 13 communicating with the septic tank 2, the filter medium A may form a pledge near the intake port 13 depending on the force conditions that naturally enter the circulation path 9 even if it is natural. Therefore, it is preferable to provide an appropriate means such as a gently rotating impeller in the intake port 13 to force the filter medium A into the circulation path 9.
この移動用水流形成手段 1 0は、 その噴出力及びその噴出口 1 0 nの高さを所定の条件で設定することにより、 循環路 9の長さ 方向及び深さ方向の両方向に対し平行する向きの渦流 1 6を形成 することができる。 そして、 この渦流 1 6は、 濾材 Aから汚泥を 剝離させるための剝離手段となる。 すなわち、 水流に乗って循環 路 9を移動して行く瀘材 Aは、 この渦流 1 6に乗って回転運動を することにより、 付着汚泥が剥離されて洗浄がなされる。 瀘材 A から剥離した汚泥は、 傾斜させられた循環路 9の床に沿って汚泥 ピッ ト 1 7に集まり、 そこから図示せぬポンプにより回収される。 移動手段としてこのような水流式の循環路 9を用いると、 瀘床 B中からの瀘材 Aの取出しをより有効に且つ効率的に行え、 また 移動手段の故障的要素を少なくすることができる。 しかし、 移動 手段としてはこのようなものに限られず、 例えば、 駆動力付のコ ンべャを用い、 また必要に応じてコンべャの途中に適宜な剝離手 段を設けるようにしてもよい。 また、 水流式とする場合でも、 濾 材 Aがー列で移動できる深さの循環路だけで目的を十分に達成可 能であり、 このような循環路を設ける場合には例えば予め成形さ れているコンクリート製のパイプ等を浄化槽に取り付けるように してもよい。 The moving water flow forming means 10 is parallel to both the length direction and the depth direction of the circulation path 9 by setting the ejection power and the height of the ejection port 10 n under predetermined conditions. A vortex 16 in the direction can be formed. And this whirlpool 16 converts sludge from filter medium A It serves as separating means for separating. That is, the filter medium A traveling in the circulation path 9 on the water stream is rotated on the vortex stream 16 to remove the attached sludge and to be washed. The sludge separated from the filter material A is collected at the sludge pit 17 along the inclined floor of the circulation path 9 and is recovered therefrom by a pump (not shown). If such a water circulation type circulation path 9 is used as the moving means, the removal of the filter medium A from the filter bed B can be performed more effectively and efficiently, and the failure factor of the moving means can be reduced. . However, the moving means is not limited to such a means. For example, a conveyor with a driving force may be used, and an appropriate separation means may be provided in the middle of the conveyor as necessary. . In addition, even in the case of a water flow type, the purpose can be sufficiently achieved only by a circulation path having a depth at which the filter medium A can move in a row, and when such a circulation path is provided, for example, it is formed in advance. A concrete pipe or the like may be attached to the septic tank.
また、 循環路 9に剥離手段を設けると、 瀘材から剝離する汚泥 の悪影響を処理済水へ与えずに済み、 浄化効率をより一層高める ことができる。 さらに、 このように渦流 1 6を用いることにより、 極めて簡単な構造でしかも効率のよい剝離手段とすることができ る。 もっとも、 基本的には前述のように濾床 Bの流動により瀘材 Aの目詰まりを十分に防止し得るので、 このような剝離手段を設 ける必要性は必ずしもなく、 また剥離手段を設けるにしても渦流 1 6によらず、 他の適宜な手段を採用し得る。  In addition, when the separating means is provided in the circulation path 9, the treated water is not adversely affected by the sludge separated from the filter medium, and the purification efficiency can be further improved. Further, by using the vortex 16 as described above, it is possible to use a very simple structure and an efficient separating means. However, basically, as described above, the clogging of the filter medium A can be sufficiently prevented by the flow of the filter bed B. Therefore, it is not always necessary to provide such separation means, and the separation means is provided. However, other appropriate means can be adopted regardless of the vortex 16.
第 1水流形成手段 1 Iは、 循環路 9により移動して来た瀘材 A を濾床 Bに戻してやるための手段の一部で、 浄化槽 2の最上流部、 具体的には循環路 9の放出口 1 4に近接させて設けられている。 この第 1水流形成手段 1 1は、 移動用水流形成手段 1 0と同様に 浄水排出ピッ ト 6から引いた処理済水を水面 Mに比較的近い部位 から噴出させることにより、 浄化槽 2の長さ方向に対して交差す る向きで且つ浄化槽 2の深さ方向に平行する向きの渦流 1 8を形 成している。 そして、 この渦流 1 8に循環路 9の放出口 1 4カヽら 濾材 Aが取り込まれて回転運動を行うことにより、 濾床 Bへ戻す ための前段状態が形成される。 また、 同時にこの渦流 1 8に乗つ ての回転運動により、 前述した循環路 9におけると同様に濾材 A の洗浄が行われ、 濾材 Aの目詰まりがより有効に防止される。 こ こで濾材 Aから剝離した汚泥は、 循環路 9の場合と同様に傾斜さ せられた床に沿って汚泥ピッ ト 1 9に集まり、 そこから図示せぬ ポンプにより回収される。 The first water flow forming means 1 I is a part of the means for returning the filter medium A moved by the circulation path 9 to the filter bed B, and is the uppermost stream portion of the septic tank 2, specifically, the circulation path 9. Is provided in close proximity to the discharge port 14. The first water flow forming means 11, like the moving water flow forming means 10, discharges the treated water drawn from the purified water discharge pit 6 from a portion relatively close to the water surface M, thereby reducing the length of the purification tank 2. A vortex 18 is formed in a direction crossing the direction and in a direction parallel to the depth direction of the septic tank 2. The vortex 18 is filled with the filter medium A at the discharge port 14 of the circulation path 9 and rotates to form a pre-stage state for returning to the filter bed B. At the same time, the filter medium A is washed by the rotational movement on the vortex 18 in the same manner as in the circulation path 9 described above, and clogging of the filter medium A is more effectively prevented. Here, the sludge separated from the filter medium A collects in the sludge pit 19 along the inclined floor in the same manner as in the case of the circulation path 9, and is collected therefrom by a pump (not shown).
第 2水流形成手段 1 2は、 第 1水流形成手段 1 1による渦流 1 8に乗って回転運動を行っている濾材 Aを濾床 Bに戻してやるた めのもので、 ガイ ド板 1 5と同様に死角を無くすためのガイ ド板 2 1で区画された角部に第 1水流形成手段 1 1に斜めに向かい合 う状態にして設けられている。 この第 2水流形成手段 1 2は、 同 様に浄水排出ピッ ト 6から引いた処理済水を噴出させることによ り、 浄化槽 2の最上流部の角部から浄化槽 2の下流側に向けて斜 めに噴射される直線状の直射流 2 0を形成する。 そして、 この直 射流 2 0により弾き飛ばされるようにして渦流 1 8中の濾材 Aが 濾床 Bの底部に戻される。  The second water flow forming means 12 is for returning the filter medium A rotating and riding on the vortex 18 generated by the first water flow forming means 11 to the filter bed B. Similarly, a corner portion defined by a guide plate 21 for eliminating a blind spot is provided so as to face diagonally to the first water flow forming means 11. The second water flow forming means 12 similarly ejects the treated water drawn from the purified water discharge pit 6 from the corner of the uppermost stream of the septic tank 2 to the downstream side of the septic tank 2. A straight direct stream 20 is formed which is injected obliquely. Then, the filter medium A in the vortex 18 is returned to the bottom of the filter bed B so that the filter medium A is swept off by the direct stream 20.
尚、 浄化槽 2の底には水を抜いた場合等に濾材 Aが底に沈むの を防止するためのロストルが設けられ、 また曝気用の空気を供給 する曝気管が設けられるが、 これらはよく知られたものなのでそ の図示は省略している。 また、 図中では分かり易くするために、 浄化槽 2と瀘材 Aやその他の部材とのサイズ比率を適宜に変えて 表現している。 The bottom of the septic tank 2 is provided with a roster to prevent the filter medium A from sinking to the bottom when water is drained, etc., and an aeration pipe for supplying air for aeration is provided. Since it is known, its illustration is omitted. Also, for simplicity in the figure, The size ratio between the septic tank 2 and the filter material A and other members is appropriately changed.
第 2実施例  Second embodiment
この実施例は、 第 6図に示すように、 循環路 9内に渦流 1 6に よる剥離手段を複数力所で設けた例で、 浄化槽が長大になる場合 に好適である。  As shown in FIG. 6, this embodiment is an example in which a separation means by a vortex 16 is provided at a plurality of places in the circulation path 9, and is suitable for a case where the septic tank becomes long.
第 3実施例  Third embodiment
この実施例は、 第 7図及び第 8図に示すように、 浄化槽 3 2が 折り返し式になっている。 つまり、 中央に仕切り壁 3 3を設けて U字状の通路を形成することにより、 上流端と下流端とが相隣接 する構造とされている。 このような構造は、 浄化槽が長大になる 場合に好適で、 その設置空間を効率的に利用できる。  In this embodiment, as shown in FIGS. 7 and 8, the septic tank 32 is of a folded type. In other words, the partition wall 33 is provided at the center to form a U-shaped passage, so that the upstream end and the downstream end are adjacent to each other. Such a structure is suitable when the septic tank is long, and the installation space can be used efficiently.
このような折り返し式の場合には、 相隣接する上流端と下流端 に跨がるコンベア 3 4を移動手段として設ければよい。 そして、 このコンベア 3 4により下流端から上流端へ濾材 Aを移し、 前述 の第 1実施例の場合と同様の第 1水流形成手段 1 1及び第 2水流 形成手段 1 2により瀘材 Aを濾床 Bの底部に戻すことにより、 第 1実施例と同様な効果が得られる。  In the case of such a folding type, a conveyor 34 extending between adjacent upstream and downstream ends may be provided as a moving means. Then, the filter medium A is transferred from the downstream end to the upstream end by the conveyor 34, and the filter medium A is filtered by the first water flow forming means 11 and the second water flow forming means 12 as in the case of the first embodiment. By returning to the bottom of the floor B, the same effect as in the first embodiment can be obtained.
〔産業上の利用可能性〕  [Industrial applicability]
この発明による瀘材循環式汚水浄化装置は、 循環手段により濾 材を循環的に動かして瀘床に静かな流動を与えるようにしている ので、 瀘材の目詰まりを有効に防止できる。 また、 このような瀘 材の循環動を利用して瀘材から汚泥を剥離するようにしているの で、 濾材の目詰まりをさらに一層有効に防止できる。 しかも、 こ れらの目詰まり防止は浄化されつつある処理水に悪影響を与える ことなくなされるので、 濾材式汚水浄化の効率性の向上に大きく 寄与できる。 In the filter medium circulating sewage purification apparatus according to the present invention, since the filter medium is circulated by the circulating means so as to give a quiet flow to the filter bed, clogging of the filter medium can be effectively prevented. Further, since the sludge is separated from the filter medium by utilizing such a circulation of the filter medium, clogging of the filter medium can be more effectively prevented. In addition, since such clogging is prevented without adversely affecting the treated water being purified, the efficiency of the filtration media type wastewater purification is greatly improved. Can contribute.

Claims

請求の範囲 The scope of the claims
(1). 浄化槽内に浮遊性の瀘材を多数個収容して濾材の集合である 瀘床を形成し、 汚水を、 浄化槽の上流側より下流側に流下させて 濾床と接触させつつ、 瀘床で繁殖した細菌により浄化処理する汚 水浄化装置に於いて、 (1). A large number of buoyant filter media are accommodated in the septic tank to form a filter bed, which is a collection of filter media, and the sewage flows down from the upstream side to the downstream side of the septic tank while contacting the filter bed. In a sewage purification system that purifies bacteria with bacteria grown on a filter bed,
浄化槽の最下流部から最上流部へ瀘材を移動させる移動手段を 備えると共に、 浄化槽の最上流部に渦流形成用の第 1水流形成手 段及び直射流形成用の第 2水流形成手段を備え、 そして浄化槽の 最下流部において瀘床中より取り出した濾材を移動手段にて浄化 槽の最上流部に移動せしめ、 この最上流部に移動せしめられた濾 材を第 1水流形成手段による渦流及び第 2水流形成手段による直 射流にて瀘床の底部から濾床に戻すようにしたことを特徴とする 濾材循環式汚水浄化装置。  A means for moving the filter media from the most downstream part to the most upstream part of the septic tank is provided, and a first water flow forming means for forming a vortex and a second water flow forming means for forming a direct stream are provided at the most upstream part of the septic tank. Then, the filter medium taken out of the filter bed at the lowermost part of the septic tank is moved to the most upstream part of the septic tank by the moving means, and the filter medium moved to the uppermost part is swirled by the first water flow forming means. A filter medium circulation type sewage purification apparatus characterized in that the filter water is returned from the bottom of the filter bed to the filter bed by the direct flow of the second water flow forming means.
(2) . —端を最下流部において、 また他端を最上流部においてそれ ぞれ浄化槽内に連通する循環路を付設し、 この循環路内に形成し た下流側から上流側に向けて流れる水流にて移動手段を形成した 請求の範囲 1項記載の瀘材循環式汚水浄化装置。  (2).-A circulation path communicating with the septic tank at the end at the most downstream part and the other end at the most upstream part is provided. From the downstream side formed in this circulation path to the upstream side. The filter medium circulation type sewage purification apparatus according to claim 1, wherein the moving means is formed by a flowing water stream.
(3) . 循環路内に濾材から汚泥を剝離させる剝離手段を設けた請求 の範囲 2項記載の瀘材循環式汚水浄化装置。  (3) The filter material circulation type sewage purification apparatus according to claim 2, further comprising a separation means for separating sludge from the filter medium in the circulation path.
(4) . 剥離手段が循環路内に形成した渦流である請求の範囲 3項記 載の瀘材循環式汚水浄化装置。  (4). The filter material circulation type sewage purification apparatus according to claim 3, wherein the separation means is a vortex formed in the circulation path.
(5) . 浄化槽を上流端と下流端とが相隣接する折り返し構造とした 請求の範囲 1項記載の濾材循環式汚水浄化装置。  (5). The filter media circulation type sewage purification apparatus according to claim 1, wherein the septic tank has a folded structure in which an upstream end and a downstream end are adjacent to each other.
(6) . 移動手段が駆動力を備えたコンペャである請求の範囲 1項ま たは範囲 5項何れか記載の瀘材循環式汚水浄化装置。  (6) The filter material circulation type sewage purification apparatus according to any one of claims 1 to 5, wherein the moving means is a conveyor provided with a driving force.
PCT/JP1990/001514 1990-11-21 1990-11-21 Sewage purifying device of filter material circulation type WO1992009533A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP19910900355 EP0558745A4 (en) 1990-11-21 1990-11-21 Sewage purifying device of filter material circulation type
PCT/JP1990/001514 WO1992009533A1 (en) 1990-11-21 1990-11-21 Sewage purifying device of filter material circulation type
AU67333/90A AU647055B2 (en) 1990-11-21 1990-11-21 Sewage purifying device of filter material circulation type
KR1019930701467A KR960001397B1 (en) 1990-11-21 1990-11-21 Sewage purifying device of filter material circulation type
CA002096523A CA2096523A1 (en) 1990-11-21 1990-11-21 Sewage purifying device of filter material circulation type
US08/050,362 US5387335A (en) 1990-11-21 1990-11-21 Filter circulating type sewage disposal apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/JP1990/001514 WO1992009533A1 (en) 1990-11-21 1990-11-21 Sewage purifying device of filter material circulation type
CA002096523A CA2096523A1 (en) 1990-11-21 1990-11-21 Sewage purifying device of filter material circulation type

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JP2011000555A (en) * 2009-06-19 2011-01-06 Kubota Corp Wastewater treatment facility and method of rebuilding the same

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