JP2004202366A - Ascending flow fluidized bed type treatment tank - Google Patents

Ascending flow fluidized bed type treatment tank Download PDF

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Publication number
JP2004202366A
JP2004202366A JP2002374498A JP2002374498A JP2004202366A JP 2004202366 A JP2004202366 A JP 2004202366A JP 2002374498 A JP2002374498 A JP 2002374498A JP 2002374498 A JP2002374498 A JP 2002374498A JP 2004202366 A JP2004202366 A JP 2004202366A
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Japan
Prior art keywords
flow
water
fluidized bed
treated
treatment tank
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JP2002374498A
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Japanese (ja)
Inventor
Naoki Murata
直樹 村田
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NGK Insulators Ltd
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NGK Insulators Ltd
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Priority to JP2002374498A priority Critical patent/JP2004202366A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

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  • Biological Treatment Of Waste Water (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
  • Water Treatment By Sorption (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ascending flow fluidized bed type treatment tank which uniformizes an ascending water flow, hardly causes a blockade, can be easily washed and can be made compact. <P>SOLUTION: This ascending flow fluidized bed type treatment tank has an ascending flow reactive fluidized bed 3, wherein packed reactive particle 31 charged in the upper stage of a flow straightener 4 into which water to be treated is introduced from below are fluidized, formed therein and the water to be treated introduced upwardly from the flow straightener 4 is treated in this treatment tank. A flow distributing element for introducing the water to be treated as an ascending water flow relatively reduced in flow irregularity in the flow distributor is constituted of a ceramic honeycomb body 41 having a large number of cell holes 42 communicating across the upper and lower end surfaces of the honeycomb body to become flow channels of water to be treated. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、上下水を浄化するため活性炭などを利用した上向流流動層式処理槽に関する。
【0002】
【従来の技術】
従来、上向流流動層式処理槽は、上下水処理や廃水処理の分野で広く用いられている。この流動層式処理は、上水高度処理が可能な粒状活性炭を充填、流動させる方法、微生物を担持させた担体を流動させる生物処理方法、あるいはマンガン酸化触媒体を応用した膜ろ過処理に適用されている。
【0003】
例えば、前記粒状活性炭を充填、流動させる方法には、図3に例示する開放型上向流流動層式処理装置(非特許文献1参照)が知られている。すなわち、活性炭流動層11は整流渠12の上方に形成されるが、その間には上方から焼成ビーズ13、砂利14、有孔ブロック15の各堆積層が設けられていて、被処理水を下方から上方に向けて通水したとき、前記各堆積層によって整流され、均一な流束となって粒状活性炭を流動させ、かつ接触することにより浄化処理される。次いで、上部から排出されるのである。
【0004】
ところが、この処理装置では、SS濃度が大の原水では前記焼成ビーズ13、砂利14、有孔ブロック15などの堆積層が閉塞するおそれがあった。また、水流の速さを大とすると通水バランスが崩れやすく、水流が不均一となり処理効率が低下するなどの問題があった。さらに、下部から送気して空気洗浄を行うと粒状活性炭と堆積層とが混合するという不具合もあり、また粒状活性炭を回収する場合に、砂利14などが混入するという不具合もあった。
【0005】
【非特許文献1】
書名:厚生省監修「水道施設設計指針・解説」、1990年、日本水道協会発行、第272、273頁、図−5.145
【0006】
【発明が解決しようとする課題】
本発明は、上記の問題点を解決するためになされたものであり、上向水流が均一にむらが少なく、かつ整流装置が閉塞しにくく、かつ洗浄も容易に行えるなど利点とともに、コンパクト化も可能となる上向流流動層式処理槽を提供する。
【0007】
【課題を解決するための手段】
上記の問題は、整流装置の上段に上向流反応流動層を形成し、前記整流装置から上向きに導入される被処理水を処理する上向流流動層式処理槽であって、前記整流装置の整流要素がセラミックハニカム体であることを特徴とする本発明の上向流流動層式処理槽によって、解決することができる。
【0008】
また、本発明は、前記整流装置が、通水性を有する多孔質セラミック素材からなり、多数のセル孔を有するモノリス型ハニカム体を複数個立設し、その上端面および下端面には、該ハニカム体相互間の空間を閉鎖するパッキングプレートを配設し、下端面のセル孔から被処理水を送給し、上端面のセル孔から整流された水流を前記反応流動層に供給するとともに、前記ハニカム体相互間の空間に洗浄用流体を供給して前記セル孔内壁を洗浄可能としたものである形態に好ましく具体化できる。
【0009】
【発明の実施の形態】
次に、本発明の上向流流動層式処理槽に係る実施形態について、図1、2を参照しながら説明する。
本発明の上向流流動層式処理槽2は、下方から被処理水を導入する整流装置4の上段に充填した反応充填粒31が流動する上向流反応流動層3を形成し、前記整流装置4から上向きに導入される被処理水を処理するようにし、浄化された処理水は上部から排出するようにした点で、先に説明した処理槽と共通する構成を有する。なお、この反応流動層3には、反応充填粒31として、上水を高度処理するための粒状活性炭、微生物を担持させた粒状担体、水中の有機物を酸化処理する粒状マンガン酸化触媒体の1種またはその組み合わせが応用される。
【0010】
そして、本発明の特徴とするところは、前記整流装置において被処理水を比較的むらが少ない上向水流として導入するための整流要素がセラミックハニカム体41である点にある。このセラミックハニカム体41は、上下端面間に連通して、被処理水の流路となる複数のセル孔42(図2参照)を有する構造からなり、セラミックス材料から形成されている。また、このセラミックハニカム体41の配設個数は、図1では4本であるが、本発明はこれに限定されない。
【0011】
また、本発明におけるセラミックハニカム体41は、外形断面は円形、多角形いずれでもよく、また内部に形成されるセル孔42の断面形状は、円形の他、三角形、四角形、6角形など適宜に適用される。なお、このセラミックハニカム体41の高さは、50mm〜1000mmの範囲、より好ましくは200〜500mmの範囲から選択される。
【0012】
また、このセラミックハニカム体41のセル孔42の有効直径は、大きくとも上段に形成される流動層3中の反応充填粒31の平均径の3倍までとするのが好ましい。その理由は、セル孔42の有効直径を、反応充填粒の平均径の3倍までとすれば、処理槽休止時に、反応充填粒31の一部がセル孔42中に流れ込むものの、入口近傍でブリッジ現象が生じて、内部まで充満することがなく、運転再開時には簡単に吹上げて開通できるので、閉塞したまま通水むらが生じることが防止できるからである。
【0013】
なお、使用される反応充填粒の平均径は、一般的に0.5mm〜10mm程度であるが、細粒の場合は、処理効率が高くなる利点があるが整流装置の閉塞を招き易くなる、系外にキャリアウトし易くなるなど欠点が生じる。また粗粒の場合は、その反対の挙動を示すので、細粒の場合でも平均径を0.5mm以上とするのが適当である。
【0014】
さらに、図2を参照して本発明の実施形態を具体的に説明すると、上向流流動層式処理槽2の前記流動層3の下段に設けられる整流装置4において、整流要素として多数のセル孔42を有するモノリス型のセラミックハニカム体41を複数個立設したものであり、このセラミックハニカム体41を通水性を有する多孔質セラミック素材によって形成するのが好ましい。
【0015】
そして、この多孔質セラミック素材ならなるセラミックスハニカム体41の上端面および下端面には、該ハニカム体相互間の空間45を上下で閉鎖するとともに、前記ハニカム体の上端面および下端面が解放されている上パッキングプレート43、下パッキングプレート44を配設している。かくして、下端面のセル孔入口42aから被処理水aを送給すれば、上端面のセル孔出口42bから整流された水流を前記反応流動層3に供給することができる。
【0016】
従って、前記反応流動層3をそれぞれ均等に分散したむらの少ない上向流によって流動することになり、反応充填粒31と被処理水aとが効果的に接触でき、浄化など処理効率の向上が図れるのである。このように、一体化されたセラミックスハニカム体41のセル孔42によって整流を行うので、従来の焼成ビーズ13、砂利14などを用いた場合に比較して、高さを約1/3に小型化できる大きなメリットが得られるのである。
【0017】
このセラミックハニカム体41によって得られる前記反応流動層3における処理水流の線速度は、反応充填粒31が粒状活性炭の場合は、最小200m/日であり、粒状マンガン触媒体の場合は、最大3000m/日であるので、200〜3000m/日の範囲に調整できるよう、被処理水aの供給能力を設定するのがよい。
【0018】
さらに、本発明の上向流流動層式処理槽では、処理運転の経過により前記ハニカム体41のセル孔42が被処理水a中の汚濁物が次第に蓄積して整流効果を損なうようになるので適宜に洗浄・除去する必要がある。このような場合、本発明では、前記した上パッキングプレート43、下パッキングプレート44を配設したことにより、このハニカム体41相互間の空間45に洗浄用流体cとして空気、オゾンガス、洗浄水、洗浄用薬液などを供給すれば、ハニカム体41を構成する通水性を有する多孔質セラミック素材の壁を透過し、セル孔42の内壁に蓄積した汚濁物を押し出して容易に剥離できるから、簡単に洗浄することができる利点が得られる。なお、洗浄済み流体は上方にまたは下方に抜き取るようにすればよい。
【0019】
【発明の効果】
本発明の上向流流動層式処理槽は、以上説明したように構成されているので、整流装置によるむらが少ない上向水流が得られ、反応流動層の処理効率が向上する、また整流装置の整流要素が反応充填粒によって閉塞しにくく、運転再開に支障を生じないうえ、前記整流要素に被処理水中の汚濁物が蓄積しても洗浄も容易に行えるので、維持管理が容易である、装置全体がコンパクト化できるなど優れた効果がある。よって本発明は、従来の問題点を解消した上向流流動層式処理槽として、技術的価値はきわめて大なるものがある。
【図面の簡単な説明】
【図1】本発明の上向流流動層式処理槽を示す断面模式図。
【図2】本発明における整流装置と流動層の関係を示す模式的斜透視図。
【図3】従来の上向流流動層式処理槽を示す断面模式図。
【符号の説明】
2 上向流流動層式処理槽、3 反応流動層、31 反応充填粒、4 整流装置、41 セラミックハニカム体、42 セル孔、42a セル孔入口、42b セル孔出口、43 上パッキングプレート、44 下パッキングプレート、45
空間、a 被処理水、b 処理水、c 洗浄用流体。
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an upflow fluidized-bed treatment tank using activated carbon or the like to purify water and sewage.
[0002]
[Prior art]
BACKGROUND ART Upstream fluidized-bed treatment tanks have been widely used in the fields of sewage treatment and wastewater treatment. This fluidized bed treatment is applied to a method of filling and fluidizing granular activated carbon capable of advanced water treatment, a biological treatment method of flowing a carrier carrying microorganisms, or a membrane filtration treatment using a manganese oxidation catalyst. ing.
[0003]
For example, as a method of filling and flowing the granular activated carbon, an open-type upward-flow fluidized-bed processing apparatus illustrated in FIG. 3 (see Non-Patent Document 1) is known. That is, the activated carbon fluidized bed 11 is formed above the straightening culvert 12, and between them, the fired beads 13, the gravel 14, and the perforated block 15 are provided from above, and the water to be treated is discharged from below. When the water flows upward, it is rectified by the respective sedimentary layers, becomes a uniform flux, causes the granular activated carbon to flow, and is purified by contact. Then it is discharged from the top.
[0004]
However, in this processing apparatus, in the case of raw water having a high SS concentration, there is a possibility that the deposited layers such as the fired beads 13, the gravel 14, and the perforated block 15 may be blocked. Further, when the speed of the water flow is increased, there is a problem that the water flow balance tends to be lost, the water flow becomes uneven, and the treatment efficiency decreases. Furthermore, when air is blown from the lower part and air cleaning is performed, there is a problem that the granular activated carbon and the sedimentary layer are mixed, and when the granular activated carbon is recovered, there is also a problem that gravel 14 and the like are mixed.
[0005]
[Non-patent document 1]
Book title: “Guidelines for water supply facilities design and commentary”, supervised by the Ministry of Health and Welfare, 1990, published by the Japan Water Works Association, pages 272 and 273, Figure 5.145
[0006]
[Problems to be solved by the invention]
The present invention has been made in order to solve the above-described problems, and has advantages such as uniform upward flow of water, less unevenness, and a rectifier that is less likely to be clogged, and can be easily cleaned, and has a reduced size. A possible upflow fluidized bed treatment tank is provided.
[0007]
[Means for Solving the Problems]
The above problem is an upflow fluidized bed treatment tank that forms an upward flow reaction fluidized bed in the upper stage of a rectifier and treats water to be treated that is upwardly introduced from the rectifier. The rectifying element is a ceramic honeycomb body, and can be solved by the upward flow fluidized bed type processing tank of the present invention.
[0008]
Further, in the present invention, the rectifying device is made of a porous ceramic material having water permeability, and a plurality of monolithic honeycomb bodies having a large number of cell holes are erected, and the upper end face and the lower end face are provided with the honeycomb. A packing plate that closes the space between the bodies is arranged, the water to be treated is supplied from the cell holes on the lower end surface, and a rectified water flow is supplied to the reaction fluidized bed from the cell holes on the upper end surface, The embodiment can be preferably embodied in a form in which a cleaning fluid is supplied to the space between the honeycomb bodies to enable the inner wall of the cell hole to be cleaned.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the upward flow fluidized bed type processing tank of the present invention will be described with reference to FIGS.
The upward flow fluidized bed treatment tank 2 of the present invention forms an upward flow reaction fluidized bed 3 in which the reaction packed particles 31 filled in the upper stage of the rectification device 4 for introducing the water to be treated from below flows. The treatment water introduced upward from the apparatus 4 is treated, and the purified treatment water is discharged from the upper part, and thus has the same configuration as the treatment tank described above. The reaction fluidized bed 3 contains, as the reaction packed particles 31, one of granular activated carbon for advanced treatment of clean water, a granular carrier supporting microorganisms, and a granular manganese oxidation catalyst for oxidizing organic substances in water. Or a combination thereof is applied.
[0010]
A feature of the present invention is that a ceramic honeycomb body 41 is a rectifying element for introducing the water to be treated as an upward water flow with relatively less unevenness in the rectifying device. The ceramic honeycomb body 41 has a structure having a plurality of cell holes 42 (see FIG. 2) communicating with upper and lower end surfaces and serving as a flow path of water to be treated, and is formed of a ceramic material. Although the number of the ceramic honeycomb bodies 41 is four in FIG. 1, the present invention is not limited to this.
[0011]
In addition, the ceramic honeycomb body 41 of the present invention may have a circular or polygonal outer cross-section, and the cross-sectional shape of the cell hole 42 formed therein may be appropriately applied such as a triangle, a quadrangle, and a hexagon in addition to a circle. Is done. In addition, the height of the ceramic honeycomb body 41 is selected from a range of 50 mm to 1000 mm, and more preferably, a range of 200 to 500 mm.
[0012]
Further, it is preferable that the effective diameter of the cell holes 42 of the ceramic honeycomb body 41 be at most three times the average diameter of the reaction packed particles 31 in the fluidized bed 3 formed at the upper stage. The reason is that if the effective diameter of the cell holes 42 is set to be three times the average diameter of the reaction packed particles, a part of the reaction packed particles 31 will flow into the cell holes 42 when the processing tank is stopped, but will be close to the inlet. This is because a bridging phenomenon occurs, the inside is not filled, and when the operation is restarted, it can be easily blown up and opened, so that it is possible to prevent the occurrence of uneven water flow with the blockage.
[0013]
In addition, the average diameter of the reaction-filled particles used is generally about 0.5 mm to 10 mm, but in the case of fine particles, there is an advantage that the processing efficiency is high, but it is easy to cause blockage of the rectifier, There are drawbacks such as easy carrier out of the system. In the case of coarse particles, the opposite behavior is exhibited. Therefore, even in the case of fine particles, it is appropriate to set the average diameter to 0.5 mm or more.
[0014]
Further, an embodiment of the present invention will be specifically described with reference to FIG. 2. In a rectifying device 4 provided below the fluidized bed 3 of the upward flow fluidized bed type processing tank 2, a large number of cells are used as rectifying elements. A plurality of monolithic ceramic honeycomb bodies 41 having holes 42 are erected, and the ceramic honeycomb bodies 41 are preferably formed of a porous ceramic material having water permeability.
[0015]
The upper and lower end faces of the ceramic honeycomb body 41 made of a porous ceramic material are closed up and down with a space 45 between the honeycomb bodies, and the upper and lower end faces of the honeycomb body are opened. An upper packing plate 43 and a lower packing plate 44 are provided. Thus, by supplying the water to be treated a from the cell hole inlet 42a on the lower end surface, a rectified water flow can be supplied to the reaction fluidized bed 3 from the cell hole outlet 42b on the upper end surface.
[0016]
Accordingly, the reaction fluidized bed 3 flows by an evenly distributed upward flow in which each of the reaction fluidized beds 3 is uniformly dispersed, and the reaction packed particles 31 and the water to be treated a can be effectively contacted with each other, thereby improving the treatment efficiency such as purification. You can do it. As described above, the flow is rectified by the cell holes 42 of the integrated ceramic honeycomb body 41, so that the height is reduced to about 1/3 as compared with the case where the conventional fired beads 13, gravel 14, etc. are used. The great benefits that can be obtained are obtained.
[0017]
The linear velocity of the treated water flow in the reaction fluidized bed 3 obtained by the ceramic honeycomb body 41 is a minimum of 200 m / day when the reaction packed particles 31 are granular activated carbon, and a maximum of 3000 m / day when the particle is a granular manganese catalyst. Since it is days, it is preferable to set the supply capacity of the water to be treated a so that it can be adjusted to a range of 200 to 3000 m / day.
[0018]
Furthermore, in the upward flow fluidized bed type processing tank of the present invention, as the processing operation progresses, the cell holes 42 of the honeycomb body 41 gradually accumulate pollutants in the water a to be treated and impair the rectification effect. It is necessary to wash and remove as appropriate. In such a case, in the present invention, since the upper packing plate 43 and the lower packing plate 44 are provided, air, ozone gas, cleaning water, cleaning water is used as the cleaning fluid c in the space 45 between the honeycomb bodies 41. When a chemical solution or the like is supplied, the contaminants that pass through the walls of the porous ceramic material having water permeability constituting the honeycomb body 41 and are accumulated on the inner wall of the cell hole 42 can be extruded and easily peeled off. There are advantages that can be done. Note that the washed fluid may be drawn upward or downward.
[0019]
【The invention's effect】
Since the upward flow fluidized bed treatment tank of the present invention is configured as described above, an upward water flow with less unevenness by the rectifier can be obtained, and the treatment efficiency of the reaction fluidized bed is improved. The rectifying element is hardly clogged by the reaction packed particles, does not hinder the restart of operation, and can be easily cleaned even if the contaminants in the water to be treated accumulate in the rectifying element, so that maintenance and management are easy. There are excellent effects such as the compactness of the entire device. Therefore, the present invention has an extremely high technical value as an upward flow fluidized bed treatment tank which has solved the conventional problems.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view showing an upward flow fluidized bed type processing tank of the present invention.
FIG. 2 is a schematic perspective view showing the relationship between the rectifier and the fluidized bed according to the present invention.
FIG. 3 is a schematic sectional view showing a conventional upward flow fluidized bed type processing tank.
[Explanation of symbols]
2 Upflow fluidized bed treatment tank, 3 reaction fluidized bed, 31 reaction packed grains, 4 rectifier, 41 ceramic honeycomb body, 42 cell hole, 42a cell hole inlet, 42b cell hole outlet, 43 upper packing plate, 44 lower Packing plate, 45
Space, a water to be treated, b treated water, c cleaning fluid.

Claims (2)

整流装置の上段に上向流反応流動層を形成し、前記整流装置から上向きに導入される被処理水を処理する上向流流動層式処理槽であって、前記整流装置の整流要素がセラミックハニカム体であることを特徴とする上向流流動層式処理槽。An upward-flow fluidized-bed treatment tank for forming an upward-flow reaction fluidized bed in the upper stage of a rectifier, and for treating water to be treated introduced upward from the rectifier, wherein the rectifier element of the rectifier is ceramic. An upward flow fluidized bed treatment tank characterized by being a honeycomb body. 前記整流装置が、通水性を有する多孔質セラミック素材からなり、多数のセル孔を有するモノリス型ハニカム体を複数個立設し、その上端面および下端面には、該ハニカム体相互間の空間を閉鎖するパッキングプレートを配設し、下端面のセル孔から被処理水を送給し、上端面のセル孔から整流された水流を反応流動層に供給するとともに、前記ハニカム体相互間の空間に洗浄用流体を供給して前記セル孔内壁を洗浄可能としたものである請求項1に記載の上向流流動層式処理槽。The rectifying device is made of a porous ceramic material having water permeability, and a plurality of monolithic honeycomb bodies having a large number of cell holes are erected, and a space between the honeycomb bodies is formed on the upper end face and the lower end face. Disposing a packing plate to be closed, feeding the water to be treated from the cell holes on the lower end face, supplying the rectified water flow from the cell holes on the upper end face to the reaction fluidized bed, and also into the space between the honeycomb bodies The upward flow fluidized bed treatment tank according to claim 1, wherein a cleaning fluid is supplied to enable the inner wall of the cell hole to be cleaned.
JP2002374498A 2002-12-25 2002-12-25 Ascending flow fluidized bed type treatment tank Withdrawn JP2004202366A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4860008B1 (en) * 2011-06-02 2012-01-25 株式会社アサカ理研 Hydrogen peroxide decomposition apparatus and hydrogen peroxide decomposition method
JP2012161728A (en) * 2011-02-04 2012-08-30 Toru Kitagawa Fluidized bed type antibacterial device
JP2015134314A (en) * 2014-01-16 2015-07-27 水ing株式会社 Operation method of upward flow type reactor, and water treatment equipment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012161728A (en) * 2011-02-04 2012-08-30 Toru Kitagawa Fluidized bed type antibacterial device
JP4860008B1 (en) * 2011-06-02 2012-01-25 株式会社アサカ理研 Hydrogen peroxide decomposition apparatus and hydrogen peroxide decomposition method
WO2012164948A1 (en) * 2011-06-02 2012-12-06 株式会社アサカ理研 Hydrogen peroxide decomposition device and decomposition method for hydrogen peroxide
JP2015134314A (en) * 2014-01-16 2015-07-27 水ing株式会社 Operation method of upward flow type reactor, and water treatment equipment

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