JP5704867B2 - Aeration equipment for water treatment, water treatment equipment - Google Patents

Aeration equipment for water treatment, water treatment equipment Download PDF

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JP5704867B2
JP5704867B2 JP2010199048A JP2010199048A JP5704867B2 JP 5704867 B2 JP5704867 B2 JP 5704867B2 JP 2010199048 A JP2010199048 A JP 2010199048A JP 2010199048 A JP2010199048 A JP 2010199048A JP 5704867 B2 JP5704867 B2 JP 5704867B2
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water
contact member
water treatment
air supply
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JP2012055801A (en
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市成　剛
剛 市成
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FUJICLEAN CO., LTD.
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    • 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

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Description

本発明は、被処理水を処理する水処理装置に装着される水処理用散気装置の構築技術に関するものである。   The present invention relates to a technique for constructing a water treatment air diffuser installed in a water treatment apparatus for treating water to be treated.

従来、一般家庭等から排出される生活排水や、産業廃水等の汚水などの被処理水を処理
する水処理装置において、水貯留領域に貯留された被処理水に対し散気処理を行なう場合があり、このような場合には、例えば下記特許文献１に記載のように、供給空気を散気孔を通じて気泡として吐出する散気装置を用いるのが一般的とされる。この場合、更に水貯留領域全体に空気を分散させるためには、散気装置の散気孔から吐出された気泡を、散気装置の上方に配置した接触ろ材によって分散させるのが有効とされる。 Conventionally, in a water treatment apparatus that treats treated water such as domestic wastewater discharged from ordinary households and sewage such as industrial wastewater, aeration treatment may be performed on the treated water stored in the water storage area. In such a case, for example, as described in Patent Document 1 below, it is common to use an air diffuser that discharges supply air as bubbles through air diffuser holes. In this case, in order to further disperse the air in the entire water storage region, it is effective to disperse the bubbles discharged from the air diffuser holes of the air diffuser by the contact filter medium disposed above the air diffuser.

特開２００５−３４２６５２号公報JP-A-2005-342652

ところで、この種の水処理装置においては、散気孔に目詰まりが生じたような散気装置の閉塞状態になると、散気装置を水処理装置から取り出して洗浄することが必要とされる。しかしながら、上記特許文献１に記載のような散気装置を用いた場合には、散気装置の散気孔から吐出された気泡を分散させる接触ろ材が散気装置の上方に配置される構成ゆえ、当該接触ろ材が邪魔になって、散気装置を水処理装置から取り出すのが困難とされる。かといって、接触ろ材を設置しないと、散気装置の散気孔から吐出された気泡を貯留領域全体に空気を分散させるという本来の目的を全うできないという問題が生じる。   By the way, in this kind of water treatment apparatus, when the diffuser is in a closed state in which the diffuser holes are clogged, it is necessary to remove the diffuser from the water treatment apparatus and clean it. However, in the case of using the air diffuser as described in Patent Document 1, the contact filter medium that disperses the bubbles discharged from the air diffuser of the air diffuser is disposed above the air diffuser. The contact filter medium becomes an obstacle, and it is difficult to take out the air diffuser from the water treatment device. However, if the contact filter medium is not installed, there arises a problem that the original purpose of dispersing the air in the entire storage region of the air bubbles discharged from the air diffuser of the air diffuser cannot be achieved.

そこで本発明は、上記の問題点に鑑みてなされたものであり、被処理水を処理する水処理装置に装着される従来の水処理用散気装置の構造を改良することを課題とする。   Then, this invention is made | formed in view of said problem, and makes it a subject to improve the structure of the conventional diffuser for water treatment with which the water treatment apparatus which processes to-be-processed water is mounted | worn.

前記課題を解決するために、本発明が構成される。なお、本発明は、一般家庭、集合住宅、商業施設、公共施設、工場等の設備から排出される生活排水や産業廃水等の原水の浄化処理を行う水処理装置に対し好適に用いられる。   The present invention is configured to solve the above problems. In addition, this invention is used suitably with respect to the water treatment apparatus which performs purification | cleaning processing of raw | natural water, such as domestic waste water discharged from facilities, such as a general household, an apartment house, a commercial facility, a public facility, a factory, industrial wastewater.

本発明にかかる水処理用散気装置は、被処理水を処理する水処理装置に装着される散気装置であり、空気供給管、吐出開口、網状の接触部材及び取り付け機構を含む。
空気供給管は、空気供給源に接続され、前記水処理装置のうち被処理水が貯留される水貯留領域に配設される管状部材として構成される。吐出開口は、空気供給管の管壁に形成され、空気供給管内を流れた空気を吐出する開口部として構成される。この吐出開口は、空気供給管の管壁に貫通状に設けられて、当該空気供給管の長手延在方向と交差する方向に空気を吐出する構成であってもよいし、或いは空気供給管の先端に設けられて、当該空気供給管の長手延在方向に沿って空気を吐出する構成であってもよい。網状の接触部材は、吐出開口から吐出された空気と接触して当該空気を細分化する接触部材として構成される。吐出開口を通じて水中に吐出された空気は、典型的には水中で気泡となって網状の接触部材に接触し、その際の接触作用によって気泡径が細かく細分化（微細化）される。この網状の接触部材は、全体として円筒形状（パイプ形状）、板片形状、ボール形状（球形状）などの形態を取り得る。取り付け機構は、網状の接触部材を空気供給管に一体状に取り付ける手段として構成される。この取り付け機構を用いることによって、網状の接触部材が空気供給管に一体状に取り付けられる。
さらに、接触部材は、空気供給管が挿設される中空部分を有するとともに、ヘチマ状の骨格部からなる網状骨格体として構成されている。この水処理用散気装置が水処理装置に装着された状態では、空気供給管が水貯留領域内を鉛直方向に長尺状に延在する。さらに、空気供給管は、空気供給源から供給された空気を流通させる流通管として、鉛直方向に延在する鉛直部分と、鉛直部分に連通するとともに鉛直方向に交差する方向に延在する交差部分と、を有する。吐出開口は、鉛直部分と交差部分のうち、少なくとも交差部分に設けられている。そして、取り付け機構は、鉛直部分が接触部材の中空部分を貫通した状態で、交差部分が接触部材の下方領域に配置され、これにより接触部材が空気供給管の交差部分に支持されて当該空気供給管に一体状に取り付けられるように構成されている。そのため、接触部材には、接触部材の下方から前記吐出開口から吐出された空気が供給され、当該空気が接触部材内を鉛直方向に移動して接触部材によって細分化される。 The aeration apparatus for water treatment according to the present invention is an aeration apparatus attached to a water treatment apparatus that treats water to be treated, and includes an air supply pipe, a discharge opening, a net-like contact member, and an attachment mechanism.
The air supply pipe is connected to an air supply source, and is configured as a tubular member disposed in a water storage area in which water to be treated is stored in the water treatment apparatus. The discharge opening is formed in the tube wall of the air supply pipe and is configured as an opening for discharging the air that has flowed through the air supply pipe. The discharge opening may be provided in a penetrating manner on the tube wall of the air supply pipe, and may discharge air in a direction intersecting the longitudinal extension direction of the air supply pipe. The structure which is provided in the front-end | tip and discharges air along the longitudinal extension direction of the said air supply pipe | tube may be sufficient. The mesh-shaped contact member is configured as a contact member that contacts air discharged from the discharge opening and subdivides the air. The air discharged into the water through the discharge opening typically forms bubbles in the water and contacts the net-like contact member, and the bubble diameter is finely divided (miniaturized) by the contact action at that time. This net-like contact member can take the form of a cylindrical shape (pipe shape), a plate piece shape, a ball shape (spherical shape) or the like as a whole. The attachment mechanism is configured as means for attaching the mesh-like contact member to the air supply pipe integrally. By using this attachment mechanism, the mesh contact member is integrally attached to the air supply pipe.
Further, the contact member has a hollow portion into which the air supply pipe is inserted, and is configured as a reticulated skeleton body including a loofah skeleton portion. In a state where the water treatment air diffuser is mounted on the water treatment device, the air supply pipe extends in the vertical direction in the water storage region. Further, the air supply pipe is a flow pipe that circulates air supplied from an air supply source, and a vertical portion that extends in the vertical direction, and a cross portion that communicates with the vertical portion and extends in a direction that intersects the vertical direction. And having. The discharge opening is provided at least at the intersecting portion of the vertical portion and the intersecting portion. Then, the attachment mechanism has the vertical portion penetrating the hollow portion of the contact member, and the intersection portion is disposed in the lower region of the contact member, whereby the contact member is supported by the intersection portion of the air supply pipe and the air supply is performed. It is configured to be integrally attached to the tube . Therefore, the air discharged from the discharge opening from below the contact member is supplied to the contact member, and the air moves vertically in the contact member and is subdivided by the contact member.

上記構成によれば、少なくとも空気供給管及び網状の接触部材を、取り付け機構を介して一体状に構成することによって、例えば散気装置に目詰まりが生じたような場合に、網状の接触部材を空気供給管と共に一緒に引き上げることが可能となる。また、このような構成は、空気の散気機能と空気の細分化機能を併せ持つ散気装置として、任意の水処理装置に手軽に設置することができ汎用性が高いというメリットがある。また、ヘチマ状の骨格部からなる網状骨格体の接触部材を用いることによって、酸素溶解効率を高めることができ、また散気装置からの散気エア風量を抑えることができるため、当該散気装置に係るエネルギーの省力化が図られる。   According to the above configuration, at least the air supply pipe and the mesh-like contact member are integrally formed via the attachment mechanism, so that, for example, when the air diffuser is clogged, the mesh-like contact member is It becomes possible to pull up together with the air supply pipe. In addition, such a configuration has an advantage that it can be easily installed in any water treatment apparatus as an air diffuser having both an air diffuser function and an air subdivide function, and is highly versatile. In addition, since the oxygen dissolution efficiency can be increased and the amount of air diffused from the air diffuser can be suppressed by using the contact member of the reticulated skeleton composed of the loofah skeleton, the air diffuser can be reduced. Labor saving of energy related to.

また本発明の水処理用散気装置にかかる更なる形態では、網状の接触部材は、少なくとも吐出開口において空気供給管の全周を被覆する円筒形状として構成されるのが好ましい。これにより空気供給管の吐出開口から吐出された空気は、水中で気泡となって接触部材と接触しつつ上向きに流れ、この接触時に効率的に細分化される。このような構成によれば、空気供給管の周りに円筒形状の接触部材を配置する構造を採用することによって、散気装置の構造を簡素化することが可能となる。   Moreover, in the further form concerning the air diffusion apparatus for water treatment of this invention, it is preferable that a mesh-shaped contact member is comprised as a cylindrical shape which coat | covers the perimeter of an air supply pipe at least in discharge opening. Thereby, the air discharged from the discharge opening of the air supply pipe becomes bubbles in water and flows upward while contacting the contact member, and is efficiently subdivided at the time of this contact. According to such a configuration, the structure of the air diffuser can be simplified by adopting a structure in which a cylindrical contact member is disposed around the air supply pipe.

また、本発明の更なる形態の水処理用散気装置は、接触部材の底面を被覆する被覆部材を備える構成であるのが好ましい。このような構成によれば、空気供給管の吐出開口から空気が吐出される際に、接触部材と水貯留領域のうち被覆部材の下方領域とが被覆部材を介して遮蔽されることなり、被覆部材の下方領域から異物が吸入されるのを防止するのに有効である。   Moreover, it is preferable that the air diffusion apparatus for water treatment of the further form of this invention is a structure provided with the coating | coated member which coat | covers the bottom face of a contact member. According to such a configuration, when air is discharged from the discharge opening of the air supply pipe, the contact member and the lower region of the covering member in the water storage region are shielded via the covering member. This is effective in preventing foreign matter from being inhaled from the lower region of the member.

また、本発明の更なる形態の水処理用散気装置は、接触部材の周面を被覆する円筒形状の第２の被覆部材を備える構成であるのが好ましい。この場合、接触部材は、鉛直方向に関する下方側の先端領域と、先端領域よりも上方側の基端領域とを有する。そして、第２の被覆部材は、接触部材のうち先端領域の周面を被覆する。このような構成によれば、吐出開口から空気が吐出される際に、接触部材と水貯留領域のうち被覆部材の側方領域とが第２の被覆部材を介して遮蔽されることとなり、被覆部材の側方領域から異物が吸入されるのを防止するのに有効である。また、接触部材に接触した空気を、第２の被覆部材の管壁を介して上方へと誘導することが可能となる。   Moreover, it is preferable that the water treatment air diffuser according to a further embodiment of the present invention includes a cylindrical second covering member that covers the peripheral surface of the contact member. In this case, the contact member has a lower end region in the vertical direction and a proximal end region above the front end region. And a 2nd coating | coated member coat | covers the surrounding surface of a front-end | tip area | region among contact members. According to such a configuration, when air is discharged from the discharge opening, the side region of the covering member among the contact member and the water storage region is shielded via the second covering member. This is effective in preventing foreign matter from being inhaled from the side region of the member. Moreover, it becomes possible to guide the air that has contacted the contact member upward through the tube wall of the second covering member.

本発明にかかる水処理装置は、処理槽本体に、水貯留領域、流入管、流出管及び散気装置を含む構成とされる。水貯留領域は、被処理水が貯留される領域として構成される。流入管は、原水が水貯留領域に流入するのを許容する開口部分として構成される。流出管は、水貯留領域にて処理された後の水が処理槽本体から流出するのを許容する開口部分として構成される。散気装置は、水貯留領域に空気を散気する機構を果たす。この水処理装置の散気装置は特に、前述の各水処理用散気装置を用いた構成とされる。
従って、上記構成の水処理装置によれば、少なくとも空気供給管及び接触部材を一体状に構成することによって、例えば散気装置に目詰まりが生じたような場合に、接触部材を空気供給管と共に一緒に引き上げることが可能となり、以ってメンテナンス作業が円滑化される。 The water treatment device according to the present invention includes a treatment tank body including a water storage region, an inflow pipe, an outflow pipe, and an air diffuser. The water storage area is configured as an area in which treated water is stored. The inflow pipe is configured as an opening that allows raw water to flow into the water storage area. An outflow pipe is comprised as an opening part which accept | permits that the water after processing in a water storage area | region flows out from a processing tank main body. The air diffuser serves to diffuse air into the water storage area. In particular, the water diffuser of this water treatment apparatus is configured to use the above-described water treatment aeration apparatuses.
Therefore, according to the water treatment apparatus having the above-described structure, at least the air supply pipe and the contact member are integrally formed, so that, for example, when the air diffuser is clogged, the contact member is attached together with the air supply pipe. They can be lifted together, which facilitates maintenance work.

また本発明の水処理装置にかかる更なる形態では、水貯留領域は、被処理水に含まれる汚泥の好気消化を行なう好気消化部を含み、当該好気消化部に水処理用散気装置の空気供給管が配設された構成であるのが好ましい。このような構成によれば、散気装置を用いることによって、特に被処理水中の汚泥の好気消化に酸素を効率良く使用することが可能となる。   Moreover, in the further form concerning the water treatment apparatus of this invention, a water storage area | region contains the aerobic digestion part which performs the aerobic digestion of the sludge contained in to-be-processed water, and the aeration for water treatment in the said aerobic digestion part It is preferable that the air supply pipe of the apparatus is arranged. According to such a structure, it becomes possible to use oxygen efficiently for the aerobic digestion of the sludge in to-be-processed water by using a diffuser.

以上のように、本発明によれば、被処理水を処理する水処理装置に装着される従来の水処理用散気装置の構造を改良することが可能となった。   As described above, according to the present invention, it is possible to improve the structure of a conventional water treatment air diffuser attached to a water treatment device for treating water to be treated.

本発明の「水処理装置」にかかる一実施の形態の水処理装置１００の概要を示す図である。It is a figure which shows the outline | summary of the water treatment apparatus 100 of one Embodiment concerning the "water treatment apparatus" of this invention. 図１中の第２散気装置２２０の側面図である。It is a side view of the 2nd air diffuser 220 in FIG. 図２中の第２散気装置２２０の断面図である。It is sectional drawing of the 2nd air diffuser 220 in FIG. 図３中の第２散気装置２２０の接触部材２２３の部分拡大図である。It is the elements on larger scale of the contact member 223 of the 2nd air diffusion apparatus 220 in FIG. 本実施例としてのＣＡＳＥ−１（□プロット）と、比較例としてのＣＡＳＥ−２（●プロット）とについて、被処理水に対する酸素溶解効率を示す図である。It is a figure which shows the oxygen dissolution efficiency with respect to to-be-processed water about CASE-1 (□ plot) as a present Example, and CASE-2 (● plot) as a comparative example. 別実施の形態の水処理装置３００の概要を示す図である。It is a figure which shows the outline | summary of the water treatment apparatus 300 of another embodiment.

以下に、本発明における一実施の形態の水処理装置の構成等を図面に基づいて説明する。なお、本実施の形態は、一般家庭、集合住宅、商業施設、公共施設、工場等の設備から排出される原水（「排水」ないし「被処理水」ともいう）を水処理領域に受け入れて処理する水処理装置について説明するものである。   Below, the structure of the water treatment apparatus of one Embodiment in this invention is demonstrated based on drawing. In this embodiment, raw water (also referred to as “drainage” or “treated water”) discharged from equipment such as ordinary households, apartment houses, commercial facilities, public facilities, factories, etc. is received and treated in the water treatment area. The water treatment apparatus which performs is demonstrated.

本発明の「水処理装置」にかかる一実施の形態の水処理装置１００の概要が図１に示される。図１に示すように、本実施の形態の水処埋装置１００は、当該水処埋装置１００の躯体としての処理槽本体１０１を有する。この水処埋装置１００は、屎尿と併せて雑排水（生活系の汚水）を処理する構成の水処理装置であり、「浄化槽」ないし「合併処理浄化槽」とも称呼される。   An outline of a water treatment apparatus 100 according to an embodiment of the “water treatment apparatus” of the present invention is shown in FIG. As shown in FIG. 1, the water treatment apparatus 100 of the present embodiment has a treatment tank body 101 as a casing of the water treatment apparatus 100. This water treatment device 100 is a water treatment device configured to treat miscellaneous wastewater (living sewage) together with manure, and is also referred to as a “septic tank” or a “merged treatment septic tank”.

処理槽本体１０１は、典型的には、いずれも半割れ状に成形された上槽及び下槽を互いに突き合わせることによって槽状とされる。この処理槽本体１０１は、流入管１０２、流出管１０３及びマンホール部１０４を備える。流入管１０２は、被処理水（原水）を処理槽本体１０１の内部空間に導入するための開口部分として構成される。流出管１０３は、処理後の水が処理槽本体１０１の内部空間から導出するための開口部分として構成される。マンホール部１０４は、入槽用、内部点検用、清掃用のマンホールが形成された部位として構成される。ここでいう処理槽本体１０１、流入管１０２及び流出管１０３がそれぞれ、本発明における「処理槽本体」、「流入管」及び「流出管」に相当する。   The processing tank body 101 is typically formed into a tank shape by abutting an upper tank and a lower tank, both of which are formed in a half-cracked shape. The processing tank main body 101 includes an inflow pipe 102, an outflow pipe 103, and a manhole portion 104. The inflow pipe 102 is configured as an opening for introducing the water to be treated (raw water) into the internal space of the treatment tank main body 101. The outflow pipe 103 is configured as an opening for the treated water to be led out from the internal space of the treatment tank main body 101. The manhole portion 104 is configured as a portion where manholes for tank entry, internal inspection, and cleaning are formed. The processing tank main body 101, the inflow pipe 102, and the outflow pipe 103 here correspond to the “processing tank main body”, the “inflow pipe”, and the “outflow pipe” in the present invention, respectively.

なお、本明細書中では、処理槽本体１０１のうちのマンホール部１０４側が槽上方ないし槽上部として規定され、またその反対側が槽下方、槽下部ないし槽底部として規定される。また、処理槽本体１０１のうちの流入管１０２側が上流側として規定され、また流出管１０３側が下流側として規定される。また、マンホール部１０４の延在面と交差する方向（典型的には、直交する方向）が鉛直方向として規定される。   In the present specification, the manhole part 104 side of the treatment tank body 101 is defined as the tank upper part or the tank upper part, and the opposite side is defined as the tank lower part, the tank lower part or the tank bottom part. Further, the inflow pipe 102 side of the processing tank body 101 is defined as the upstream side, and the outflow pipe 103 side is defined as the downstream side. In addition, a direction (typically, a direction orthogonal) intersecting the extending surface of the manhole portion 104 is defined as the vertical direction.

処理槽本体１０１の内部収容空間は、流入管１０２を通じて受け入れた原水を貯留しつつ所定の水処理がなされる水貯留領域ないし水処理領域とされる。この水貯留領域には、水処理機構１０１ａとして、嫌気濾床槽１１０、接触ばっ気槽１３０、第１沈殿槽１５０、消毒槽１７０、好気消化槽２１０、第２沈殿槽２３０が収容されている。この水処理機構１０１ａによって、本発明における「水貯留領域」が構成される。本実施の形態では、この水処理機構１０１ａは、嫌気濾床槽１１０、接触ばっ気槽１３０、第１沈殿槽１５０、消毒槽１７０を含む第１の処理経路と、好気消化槽２１０及び第２沈殿槽２３０を含む第２の処理経路とに分類される。   The internal storage space of the treatment tank main body 101 is a water storage area or a water treatment area where a predetermined water treatment is performed while storing raw water received through the inflow pipe 102. In this water storage area, an anaerobic filter bed tank 110, a contact aeration tank 130, a first settling tank 150, a disinfection tank 170, an aerobic digestion tank 210, and a second settling tank 230 are accommodated as the water treatment mechanism 101a. Yes. This water treatment mechanism 101a constitutes a “water storage area” in the present invention. In the present embodiment, the water treatment mechanism 101a includes an anaerobic filter bed tank 110, a contact aeration tank 130, a first settling tank 150, a disinfection tank 170, an aerobic digestion tank 210 and a first aeration tank. 2 and the second processing path including the sedimentation tank 230.

（第１の処理経路）
嫌気濾床槽１１０は、被処理水中に含まれる夾雑物やＳＳ（浮遊物質）成分等の分離・除去、及び被処理水中の有機汚濁物質を嫌気処理（還元）する機能を有する処理槽として構成される。この嫌気濾床槽１１０は、有機汚濁物質を嫌気処理（還元）する嫌気性微生物が付着する所定量の濾材１１２が濾床１１１に充填された構成を有する。この濾材１１２としては、例えば球状の濾材を好適に用いることができる。嫌気濾床槽１１０に流入した被処理水が、この濾床１１１を上向きに流れる際に被処理水中の有機汚濁物質が嫌気処理（還元）され、ＢＯＤの低減と汚泥の減量化が図られる。また、濾床１１１に充填された濾材１１２によって、被処理水中に含まれる夾雑物やＳＳ等の分離・除去が行われることとなる。この嫌気濾床槽１１０にて汚泥（図１中の汚泥Ｓ）が分離された後の水は、嫌気濾床槽１１０の槽上部に形成された移流開口１１４を通じて接触ばっ気槽１３０へ移流する。なお、嫌気濾床槽１１０の濾床１１１における水の流れについては、製品の仕様等に応じて適宜の選択が可能であり、濾床１１１を上向きに流れる構成にかえて、濾床１１１を下向きに流れる構成を採用することもできる。 (First processing path)
The anaerobic filter bed tank 110 is configured as a treatment tank having a function of separating and removing impurities and SS (floating matter) components contained in the water to be treated and anaerobic treatment (reduction) of organic pollutants in the water to be treated. Is done. The anaerobic filter bed tank 110 has a configuration in which a predetermined amount of a filter medium 112 to which anaerobic microorganisms for anaerobic treatment (reduction) of organic pollutants adhere is packed in the filter bed 111. For example, a spherical filter medium can be suitably used as the filter medium 112. When the water to be treated flowing into the anaerobic filter bed tank 110 flows upward through the filter bed 111, the organic pollutants in the water to be treated are anaerobically treated (reduced), thereby reducing BOD and reducing sludge. In addition, the filter medium 112 filled in the filter bed 111 separates and removes impurities, SS, and the like contained in the water to be treated. The water after the sludge (sludge S in FIG. 1) is separated in the anaerobic filter bed tank 110 is transferred to the contact aeration tank 130 through the advection opening 114 formed in the upper part of the anaerobic filter bed tank 110. . In addition, about the flow of the water in the filter bed 111 of the anaerobic filter bed tank 110, it can select suitably according to the specification etc. of a product, and it changes to the structure which flows through the filter bed 111 upwards, and the filter bed 111 is turned down It is also possible to adopt a configuration that flows through

接触ばっ気槽１３０は、嫌気濾床槽１１０で固液分離されたあとの水の好気処理を行う機能を有する処理槽として構成される。この接触ばっ気槽１３０では、有機汚濁物質を好気処理（酸化）する好気性微生物が付着する所定量の接触材１３２が充填部１３１に充填されている。また、充填部１３１の下方には、好気処理に用いるエア散気用の第１散気装置１３４が配置されている。この接触ばっ気槽１３０において、第１散気装置１３４から散気された散気エアが、その第１散気装置１３４の上方に配置された充填部１３１に向けて上向きに流れた状態で、その流れとは反対の下向き流れの被処理水が接触材１３２に接触することによって、この被処理水中の有機汚濁物質が好気処理されることとなる。この接触ばっ気槽１３０で処理された後の水は、充填部１３１の底部に形成された開口部１３５を通じて第１沈殿槽１５０へと移流する。   The contact aeration tank 130 is configured as a treatment tank having a function of performing an aerobic treatment of water after being subjected to solid-liquid separation in the anaerobic filter bed tank 110. In the contact aeration tank 130, a predetermined amount of contact material 132 to which aerobic microorganisms for aerobic treatment (oxidation) of organic pollutants adhere is filled in the filling portion 131. A first air diffuser 134 for air diffuser used for the aerobic treatment is disposed below the filling unit 131. In the contact aeration tank 130, the diffused air diffused from the first diffuser 134 flows upward toward the filling portion 131 disposed above the first diffuser 134. When the water to be treated of the downward flow opposite to the flow comes into contact with the contact material 132, the organic pollutant in the water to be treated is aerobically treated. The water that has been treated in the contact aeration tank 130 is transferred to the first settling tank 150 through the opening 135 formed in the bottom of the filling section 131.

第１沈殿槽１５０は、接触ばっ気槽１３０で処理された後の水の沈降分離作用（「沈殿作用」ともいう）によって固液分離を行う処理槽として構成される。ここでいう沈降分離作用は、第１沈殿槽１５０において、汚泥を含む被処理水を滞留させたときの水と汚泥との間の比重差によって得られる。これにより、接触ばっ気槽１３０から第１沈殿槽１５０に移流した水は、この第１沈殿槽１５０において滞留する際に、汚泥等の固形分と上澄水とに固液分離されることとなる。この第１沈殿槽１５０にて固液分離されたあとの水（上澄水）は、当該第１沈殿槽１５０の上部から開口部１５１を通じて消毒槽１７０へ移流する。   The first sedimentation tank 150 is configured as a treatment tank that performs solid-liquid separation by the sedimentation action (also referred to as “precipitation action”) of water that has been treated in the contact aeration tank 130. The sedimentation action here is obtained by the specific gravity difference between the water and the sludge when the treated water containing sludge is retained in the first sedimentation tank 150. As a result, when the water transferred from the contact aeration tank 130 to the first settling tank 150 is retained in the first settling tank 150, it is solid-liquid separated into solids such as sludge and supernatant water. . The water (supernatant water) after the solid-liquid separation in the first sedimentation tank 150 is transferred from the upper part of the first sedimentation tank 150 to the disinfection tank 170 through the opening 151.

一方、この第１沈殿槽１５０における固液分離によって発生する汚泥（固形物）は、当該第１沈殿槽１５０の底部領域１５３に吸入口が配設され、また第２沈殿槽２３０に向けて吐出口が配設された第１エアリフト１５２によって、第２沈殿槽２３０へと返送（循環）される。第１エアリフト１５２によって返送されるこの汚泥には、接触ばっ気槽１３０における好気処理に由来の好気汚泥（活性汚泥や生物膜）が含まれる。この第１エアリフト１５２は、詳細な構成については説明を省略するが、配管内に供給されたエアのエア流れによって吸入口から移送物を吸入して吐出口で吐出する既知の構成のエアリフト式ポンプとして構成される。なお、必要に応じては、この第１エアリフト１５２に代えて水中ポンプを用いることもできる。   On the other hand, the sludge (solid matter) generated by the solid-liquid separation in the first sedimentation tank 150 is provided with a suction port in the bottom region 153 of the first sedimentation tank 150 and discharged toward the second sedimentation tank 230. It is returned (circulated) to the second settling tank 230 by the first air lift 152 provided with an outlet. The sludge returned by the first air lift 152 includes aerobic sludge (activated sludge and biofilm) derived from aerobic treatment in the contact aeration tank 130. The first air lift 152 is an air lift pump having a known configuration in which the detailed configuration is omitted, but the transferred material is sucked from the suction port by the air flow of air supplied into the pipe and discharged from the discharge port. Configured as If necessary, a submersible pump can be used instead of the first air lift 152.

消毒槽１７０は、第１沈殿槽１５０から流入した水を消毒処理する機能を有する処理槽として構成される。この消毒槽１７０は、消毒処理を行うための消毒剤（固形塩素剤）が充填された薬剤筒１７１を備えている。この消毒槽１７０において薬剤筒１７１からの消毒剤によって消毒処理された後の水は、処理槽本体１０１に設けられた流出管１０３を通じて処理槽本体１０１の外部へと放流される。   The disinfection tank 170 is configured as a treatment tank having a function of disinfecting water flowing from the first sedimentation tank 150. The disinfecting tank 170 includes a medicine cylinder 171 filled with a disinfectant (solid chlorine agent) for performing disinfection processing. The water after being sterilized by the disinfectant from the medicine cylinder 171 in the sterilization tank 170 is discharged to the outside of the processing tank body 101 through the outflow pipe 103 provided in the processing tank body 101.

（第２の処理経路）
好気消化槽２１０は、第２沈殿槽２３０から第２エアリフト２３２によって移送された被処理水中の汚泥を分解するための好気性消化を行う処理槽として構成される。第２エアリフト２３２は、前述の第１エアリフト１５２と同様の構成とされる。この好気消化槽２１０は、好気消化部２１１の下方にエア散気用の第２散気装置２２０が設置された構成を有する。なお、好気消化部（「好気処理部」ともいう）２１１に、前述の嫌気濾床槽１１０の濾材１１２と同様の球状の濾材や、円柱状、円筒状、板状、網状などの形状の濾材が充填された構成を採用することもできるが、図１に示す実施形態では、第２散気装置２２０の散気性能（詳細については、後述する）を高めることによって、当該濾材を省略することが好ましい。第２散気装置２２０からその上方に配置された好気消化部２１１に向けてエア散気がなされた好気雰囲気下（酸素存在下）において、被処理水が好気消化部２１１を下向きに流れることによって当該被処理水中の汚泥の好気性消化がなされることとなる。ここでいう「好気性消化」とは、汚泥中の有機物を微生物の働きによって分解する処理であって、特に好気雰囲気下において好気性微生物の働きによって汚泥中の有機物を分解する処理とされる。この好気消化槽２１０にて汚泥の好気性消化がなされた後の水は、好気消化槽２１０の槽底部に形成された開口部２１４を通じて第２沈殿槽２３０へと移流（循環）することとなる。ここでいう好気消化槽２１０が、本発明における「好気消化部」に相当する。 (Second processing path)
The aerobic digestion tank 210 is configured as a treatment tank that performs aerobic digestion for decomposing sludge in the water to be treated transferred from the second sedimentation tank 230 by the second air lift 232. The second air lift 232 has the same configuration as the first air lift 152 described above. The aerobic digestion tank 210 has a configuration in which a second aeration device 220 for air aeration is installed below the aerobic digestion unit 211. The aerobic digestion section (also referred to as “aerobic treatment section”) 211 has a spherical filter medium similar to the filter medium 112 of the anaerobic filter bed tank 110 described above, or a columnar, cylindrical, plate-like, or net-like shape. In the embodiment shown in FIG. 1, the filter medium is omitted by improving the air diffusion performance (details will be described later) of the second air diffuser 220 in the embodiment shown in FIG. 1. It is preferable to do. In an aerobic atmosphere (in the presence of oxygen) in which air is diffused from the second air diffuser 220 toward the aerobic digester 211 disposed above, the water to be treated faces the aerobic digester 211 downward. By flowing, aerobic digestion of the sludge in the treated water is performed. “Aerobic digestion” as used herein refers to a process of decomposing organic substances in sludge by the action of microorganisms, and in particular, a process of decomposing organic substances in sludge by the action of aerobic microorganisms in an aerobic atmosphere. . The water after the aerobic digestion of sludge in the aerobic digestion tank 210 is transferred (circulated) to the second sedimentation tank 230 through the opening 214 formed at the bottom of the aerobic digestion tank 210. It becomes. The aerobic digester 210 here corresponds to the “aerobic digester” in the present invention.

第２沈殿槽２３０は、流入管１０２を通じて流入した原水、第１沈殿槽１５０の底部領域１５３から第１エアリフト１５２によって返送（循環）された水、更には、好気消化槽２１０において汚泥の好気性消化がなされたあとの水を共に受け入れ、沈降分離作用（沈殿作用）によって固液分離する処理槽である。ここでいう沈降分離作用は、第２沈殿槽２３０において、汚泥を含む被処理水を滞留させたときの水と汚泥との間の比重差によって得られる。被処理水がこの第２沈殿槽２３０において滞留する際に、汚泥等の固形分と上澄み水とに固液分離されることとなる。この第２沈殿槽２３０にて固液分離された後の水（上澄水）は、当該第２沈殿槽２３０の上部から移流開口２３１を通じて嫌気濾床槽１１０へ移流する。一方、この第２沈殿槽２３０における固液分離によって発生する汚泥（「固形物」ともいう）は、当該第２沈殿槽２３０の底部に配設された第２エアリフト２３２によって好気消化槽２１０へとポンプ移送（循環）される。   The second sedimentation tank 230 is the raw water that has flowed in through the inflow pipe 102, the water returned (circulated) by the first air lift 152 from the bottom region 153 of the first sedimentation tank 150, and the sludge in the aerobic digestion tank 210. It is a treatment tank that accepts water after aerobic digestion and separates it into solid and liquid by sedimentation and separation (precipitation). The sedimentation action here is obtained by the specific gravity difference between the water and the sludge when the treated water containing sludge is retained in the second sedimentation tank 230. When the water to be treated stays in the second settling tank 230, it is separated into solid and liquid such as sludge and supernatant water. The water (supernatant water) after the solid-liquid separation in the second settling tank 230 is transferred from the upper part of the second settling tank 230 to the anaerobic filter bed tank 110 through the transfer opening 231. On the other hand, sludge (also referred to as “solid matter”) generated by solid-liquid separation in the second sedimentation tank 230 is transferred to the aerobic digestion tank 210 by the second air lift 232 disposed at the bottom of the second sedimentation tank 230. And pumped (circulated).

特に、本実施の形態では、第１沈殿槽１５０の底部領域１５３に存在する好気汚泥（活性汚泥や生物膜）を含む水を循環水として第２沈殿槽２３０へと移送する構成であるため、この好気汚泥中に多く含まれる捕食性の高い原生動物や後生動物などの微生物は、第２沈殿槽２３０にて沈降濃縮されたのち、第２エアリフト２３２によって好気消化槽２１０へと移送されることとなる。これにより、汚泥の自己酸化作用に加えて、第１沈殿槽１５０から移送された微生物の捕食作用によって、好気消化槽２１０における汚泥消化速度（「汚泥消化効率」、「汚泥削減率」、「汚泥減量化率」とすることもできる）を高めることが可能となる。また、本構成に関しては、第１沈殿槽１５０からの循環水を直接的に好気消化槽２１０へ移送するのではなく、一旦第２沈殿槽２３０に移送してこの第２沈殿槽２３０にて微生物を沈降濃縮させたのち、好気消化槽２１０へと間接的に移送するため、この好気消化槽２１０のＨＲＴ（水理学的滞留時間）が短くなり汚泥消化速度が下がるのを抑えることが可能となる。   In particular, in the present embodiment, water including aerobic sludge (activated sludge and biofilm) present in the bottom region 153 of the first sedimentation tank 150 is transferred to the second sedimentation tank 230 as circulating water. Microorganisms such as highly predatory protozoa and metazoans contained in the aerobic sludge are concentrated in the second sedimentation tank 230 and then transferred to the aerobic digestion tank 210 by the second air lift 232. Will be. Thereby, in addition to the self-oxidation action of sludge, by the predatory action of the microorganisms transferred from the first sedimentation tank 150, the sludge digestion rate ("sludge digestion efficiency", "sludge reduction rate", " It is possible to increase the sludge reduction rate). In addition, regarding this configuration, the circulating water from the first sedimentation tank 150 is not directly transferred to the aerobic digestion tank 210, but once transferred to the second sedimentation tank 230 and then in the second sedimentation tank 230. Since the microorganisms are settled and concentrated and then indirectly transferred to the aerobic digestion tank 210, the HRT (hydraulic residence time) of the aerobic digestion tank 210 is shortened and the sludge digestion rate is prevented from decreasing. It becomes possible.

ここで、上記の第２散気装置２２０の具体的な構成について、図２〜図４を参照しつつ説明する。図２には図１中の第２散気装置２２０の側面図が示されており、図３には図２中の第２散気装置２２０の断面図が示されている。また、図４には、図３中の第２散気装置２２０の接触部材２２３の構造を示す部分拡大図である。   Here, a specific configuration of the second air diffuser 220 will be described with reference to FIGS. 2 shows a side view of the second air diffuser 220 in FIG. 1, and FIG. 3 shows a cross-sectional view of the second air diffuser 220 in FIG. 4 is a partially enlarged view showing the structure of the contact member 223 of the second air diffuser 220 in FIG.

図２及び図３に示すように、本実施の形態の第２散気装置２２０は、空気供給管２２１と、網状の接触部材２２３、誘導部材２２５、キャップ部材２２７及び取り付け部材２２９に大別され、これらの各構成部材が一体状に構成されている。ここでいう第２散気装置２２０が、本発明における「水処理用散気装置」に相当する。   As shown in FIGS. 2 and 3, the second air diffuser 220 according to the present embodiment is roughly divided into an air supply pipe 221, a net-like contact member 223, a guide member 225, a cap member 227, and a mounting member 229. Each of these constituent members is integrally formed. Here, the second air diffuser 220 corresponds to the “water diffuser for water treatment” in the present invention.

空気供給管２２１は、処理槽本体１０１の外部に設けられた空気供給源に接続される長尺状の配管部材として構成される。この空気供給管２２１は、処理槽本体１０１に装着された装着状態では、処理槽本体１０１内の水貯留領域を構成する好気消化槽２１０に配設されるとともに、処理槽本体１０１の槽上下方向（鉛直方向）に延在しており、その下側の端部（「先端部分」ともいう）に一対の吐出開口２２２，２２２を備えている。従って、この空気供給管２２１は、空気供給源から供給された空気を、吐出開口２２２に向けて下向きに流通させる流通管としての機能を果たす。この空気流れが、例えば図３中の矢印Ｆａによって示される。各吐出開口２２２は、空気供給管２２１に設けられ、空気供給管２２１内を流れた空気を気泡として吐出する吐出開口部分として構成される。この吐出開口２２２は、空気供給管２２１の管壁に貫通状に設けられて、当該空気供給管２２１の長手延在方向と交差する方向に空気を吐出する構成であってもよいし、或いは空気供給管２２１の先端に設けられて、当該空気供給管２２１の長手延在方向に沿って空気を吐出する構成であってもよい。また、この空気供給管２２１の先端側の領域は、第１の先端領域２２１ａと、第１の先端領域２２１ａのうちの更なる先端側の領域である第２の先端領域２２１ｂとして規定される。ここでいう空気供給管２２１及び吐出開口２２２がそれぞれ、本発明における「空気供給管」及び「吐出開口」に相当する。   The air supply pipe 221 is configured as a long piping member connected to an air supply source provided outside the processing tank main body 101. The air supply pipe 221 is disposed in the aerobic digestion tank 210 that constitutes a water storage area in the processing tank main body 101 in the mounted state of the processing tank main body 101, and the upper and lower tanks of the processing tank main body 101. It extends in the direction (vertical direction), and is provided with a pair of discharge openings 222 and 222 at its lower end (also referred to as “tip portion”). Therefore, the air supply pipe 221 functions as a flow pipe that allows the air supplied from the air supply source to flow downward toward the discharge opening 222. This air flow is indicated, for example, by an arrow Fa in FIG. Each discharge opening 222 is provided in the air supply pipe 221 and is configured as a discharge opening portion that discharges air flowing through the air supply pipe 221 as bubbles. The discharge opening 222 may be provided in a penetrating manner in the tube wall of the air supply pipe 221 so as to discharge air in a direction intersecting with the longitudinal extension direction of the air supply pipe 221 or air. It may be configured to be provided at the tip of the supply pipe 221 and to discharge air along the longitudinal extension direction of the air supply pipe 221. The region on the distal end side of the air supply pipe 221 is defined as a first distal end region 221a and a second distal end region 221b that is a region on the further distal end side of the first distal end region 221a. The air supply pipe 221 and the discharge opening 222 here correspond to the “air supply pipe” and the “discharge opening” in the present invention, respectively.

網状の接触部材２２３は、空気供給管２２１の吐出開口２２２，２２２から吐出された空気（「気泡」ともいう）との接触によって、当該空気を細分化（「微細化」ともいう）する機能を果たす。ここでいう網状の接触部材２２３が、本発明における「網状の接触部材」に相当する。この接触部材２２３は、空気供給管２２１の第１の先端領域２２１ａの全周を覆うように設けられた長尺状の被覆部材として構成されており、骨格部２２３ａ及び空間部２２３ｂを含む（図４参照）。典型的には、この接触部材２２３は、円筒形状（パイプ形状）とされその中心部の中空部分に空気供給管２２１が挿設されるように構成される。   The net-like contact member 223 has a function of subdividing the air (also referred to as “miniaturization”) by contact with the air (also referred to as “bubbles”) discharged from the discharge openings 222 and 222 of the air supply pipe 221. Fulfill. The net-like contact member 223 here corresponds to the “net-like contact member” in the present invention. The contact member 223 is configured as a long covering member provided so as to cover the entire circumference of the first tip region 221a of the air supply pipe 221, and includes a skeleton portion 223a and a space portion 223b (see FIG. 4). Typically, the contact member 223 has a cylindrical shape (pipe shape) and is configured such that an air supply pipe 221 is inserted into a hollow portion at the center thereof.

接触部材２２３の骨格部２２３ａは、接触部材２２３の骨格部分、いわゆる「ヘチマ状（ヘチマ様）」ないし「立体網状」の骨格部分を形成している。この骨格部２２３ａが、本発明における「ヘチマ状の骨格部」に相当する。従って、本実施の形態の接触部材２２３は、ヘチマ状の骨格部からなる網状骨格体と云うこともできる。なお、本実施の形態の接触部材２２３では、骨格部２２３ａは、一定の形状が複数組み合わせられて規則的に配設されることによって形成されてもよいし、或いは不規則な形状の組み合わせによって形成されてもよい。   The skeleton portion 223 a of the contact member 223 forms a skeleton portion of the contact member 223, that is, a so-called “hetch-like (hegima-like)” or “three-dimensional net-like” skeleton portion. This skeleton portion 223a corresponds to the “hedge-like skeleton portion” in the present invention. Therefore, the contact member 223 of the present embodiment can also be referred to as a reticulated skeleton body composed of a loofah skeleton portion. In the contact member 223 of the present embodiment, the skeleton portion 223a may be formed by regularly arranging a plurality of fixed shapes in combination, or formed by a combination of irregular shapes. May be.

一方、接触部材２２３の空間部２２３ｂは、骨格部２２３ａによって区画された中空空間とされ、水及び空気の流通を許容する空間部分を形成している。この場合、空気供給管２２１の吐出開口２２２が接触部材２２３によって被覆される構成であってもよいし、或いは空気供給管２２１の吐出開口２２２が接触部材２２３よりも下方に配置される構成であってもよい。本実施の形態では、空気供給管２２1の周りに円筒形状の接触部材２２３を配置する構造を採用することによって、散気装置の構造を簡素化することが可能となる。   On the other hand, the space part 223b of the contact member 223 is a hollow space defined by the skeleton part 223a, and forms a space part that allows the flow of water and air. In this case, the discharge opening 222 of the air supply pipe 221 may be configured to be covered with the contact member 223, or the discharge opening 222 of the air supply pipe 221 may be disposed below the contact member 223. May be. In the present embodiment, the structure of the air diffuser can be simplified by adopting a structure in which the cylindrical contact member 223 is arranged around the air supply pipe 221.

図３に示されるように、誘導部材２２５は、空気供給管２２１の吐出開口２２２から吐出された空気を、接触部材２２３の内部を槽上方へと所定高さまで誘導する機能を果たす。また、この誘導部材２２５は、空気供給管２２１の吐出開口２２２から吐出された空気を定められた領域内で接触部材２２３に確実に接触させる機能をも有する。これらの機能のための具体的な構成として、この誘導部材２２５は、空気供給管２２１の第２の先端領域２２１ｂ（空気供給管２２１の吐出開口２２２から上方に向けて所定高さまでの範囲）において接触部材２２３の全周を覆うように設けられる円筒形状（パイプ形状）とされる。すなわち、接触部材２２３はその長尺方向に関し中央分よりも下側（概ね下半分）が誘導部材２２５によって被覆されている。この場合、接触部材２２３の外表面２２３ｃと誘導部材２２５の内壁面２２５ａとが密着するように構成されてもよいし、或いは接触部材２２３の外表面２２３ｃと誘導部材２２５の内壁面２２５ａとの間に微小のクリアランスが形成されてもよい。ここでいう誘導部材２２５が、本発明における「第２の被覆部材」に相当する。   As shown in FIG. 3, the guide member 225 functions to guide the air discharged from the discharge opening 222 of the air supply pipe 221 up to a predetermined height inside the contact member 223 upward of the tank. Further, the guide member 225 also has a function of reliably bringing the air discharged from the discharge opening 222 of the air supply pipe 221 into contact with the contact member 223 within a predetermined region. As a specific configuration for these functions, the guide member 225 is provided in the second tip region 221b of the air supply pipe 221 (range from the discharge opening 222 of the air supply pipe 221 upward to a predetermined height). A cylindrical shape (pipe shape) is provided so as to cover the entire circumference of the contact member 223. That is, the contact member 223 is covered with the guide member 225 on the lower side (generally the lower half) with respect to the longitudinal direction of the contact member 223. In this case, the outer surface 223c of the contact member 223 and the inner wall surface 225a of the guide member 225 may be configured to closely contact each other, or between the outer surface 223c of the contact member 223 and the inner wall surface 225a of the guide member 225. A minute clearance may be formed. The guide member 225 here corresponds to the “second covering member” in the present invention.

キャップ部材２２７は、この誘導部材２２５の両端部のうちの下側端部２２５ｂを閉鎖する機能を果たすべく、誘導部材２２５或いは空気供給管２２１に取り付け固定される。このキャップ部材２２７は、有底筒状の部材として構成され、その開口側から誘導部材２２５に被せられることによって、誘導部材２２５の下側端部２２５ｂが閉鎖されて、接触部材２２３の底面（下面）が被覆される。ここでいうキャップ部材２２７が、本発明における「被覆部材」に相当する。   The cap member 227 is attached and fixed to the guide member 225 or the air supply pipe 221 so as to perform a function of closing the lower end 225b of both ends of the guide member 225. The cap member 227 is configured as a bottomed cylindrical member, and the lower end portion 225b of the guide member 225 is closed by covering the guide member 225 from the opening side, so that the bottom surface (lower surface) of the contact member 223 is closed. ) Is coated. The cap member 227 here corresponds to the “coating member” in the present invention.

上記構成によれば、吐出開口２２２から吐出された空気は、誘導部材２２５の内壁面２２５ａによって空気供給管２２１の延在方向と交差する方向の流れが規制された状態で、吐出開口２２２よりも上方へと誘導されつつ、この誘導の間は、接触部材２２３の内部を上向きに通過する。この空気流れが、例えば図３中の矢印Ｆｂによって示される。このとき、空気は接触部材２２３の網状の骨格部２２３ａとの接触作用によって細分化され、被処理水に対する空気中の酸素の溶解効率が高められつつ、接触部材２２３の空間部２２３ｂを通過しつつ上向きに流れる。   According to the above configuration, the air discharged from the discharge opening 222 is more than the discharge opening 222 in a state where the flow in the direction intersecting the extending direction of the air supply pipe 221 is regulated by the inner wall surface 225 a of the guide member 225. While being guided upward, the inside of the contact member 223 passes upward during this guidance. This air flow is indicated, for example, by an arrow Fb in FIG. At this time, the air is subdivided by the contact action of the contact member 223 with the net-like skeleton portion 223a, and the efficiency of dissolution of oxygen in the air with respect to the water to be treated is increased while passing through the space portion 223b of the contact member 223. Flows upward.

その後、水中に溶存することなく誘導部材２２５の上側端部２２５ｃよりも上方に達した空気は、誘導部材２２５の内壁面２２５ａによる空気供給管２２１の延在方向と交差する方向の流れ規制が解除されるため、その空気の一部がそのまま接触部材２２３の内部を上向きに流れる一方、残りの空気は接触部材２２３の外部を上向きに流れる。この空気流れが、例えば図３中の矢印Ｆｃによって示される。かくして、図１に模式的に示すように、第２散気装置２２０から好気消化槽２１０の全体に気泡が概ね均一に供給されることとなる。   After that, the air that has reached the upper end 225c of the guide member 225 without being dissolved in water is released from the flow restriction in the direction intersecting the extending direction of the air supply pipe 221 by the inner wall surface 225a of the guide member 225. Therefore, a part of the air flows upward in the contact member 223 as it is, while the remaining air flows upward in the outside of the contact member 223. This air flow is indicated by, for example, an arrow Fc in FIG. Thus, as schematically shown in FIG. 1, the air bubbles are substantially uniformly supplied from the second air diffuser 220 to the entire aerobic digester 210.

第２散気装置２２０の一体化構造について、典型的には、空気供給管２２１の周りに円筒形状の接触部材２２３を配設し、更に接触部材２２３の周りに円筒形状の誘導部材２２５を配設した状態で、空気供給管２２１が貫設される開口部を有するキャップ部材２２７によって接触部材２２３及び誘導部材２２５を下方から支持し、当該キャップ部材２２７の下方から取り付け部材２２９を空気供給管２２１に接続する接続構造を用いることができる。この接続構造によって、少なくとも接触部材２２３を空気供給管２２１に一体状に取り付けられる。空気供給管２２１と取り付け部材２２９との接続構造に関しては、両者を螺合、溶接、接着等によって互いに接続する構成を採用することができる。従って、取り付け部材２２９を空気供給管２２１に接続するこの接続構造によって、本発明における「取り付け機構」が構成される。この場合、空気供給管２２１、接触部材２２３、誘導部材２２５及びキャップ部材２２７は、互いに同心状に構成されるのが好ましい。   Regarding the integrated structure of the second air diffuser 220, typically, a cylindrical contact member 223 is disposed around the air supply pipe 221, and a cylindrical guide member 225 is disposed around the contact member 223. In this state, the contact member 223 and the guide member 225 are supported from below by a cap member 227 having an opening through which the air supply pipe 221 passes, and the attachment member 229 is supported from below the cap member 227. A connection structure for connecting to can be used. With this connection structure, at least the contact member 223 is integrally attached to the air supply pipe 221. Regarding the connection structure between the air supply pipe 221 and the attachment member 229, a configuration in which both are connected to each other by screwing, welding, adhesion, or the like can be employed. Therefore, this connection structure for connecting the attachment member 229 to the air supply pipe 221 constitutes the “attachment mechanism” in the present invention. In this case, the air supply pipe 221, the contact member 223, the guide member 225, and the cap member 227 are preferably configured concentrically with each other.

なお、空気供給管２２１に対しキャップ部材２２７を直接的に接続することが可能であれば、取り付け部材２２９を省略することもできる。このときの空気供給管２２１とキャップ部材２２７との接続については、前述の空気供給管２２１と取り付け部材２２９との接続構造と同様の接続構造を採用することができる。この場合には、キャップ部材２２７を空気供給管２２１に接続するこの接続構造によって、本発明における「取り付け機構」が構成される。   Note that the attachment member 229 can be omitted if the cap member 227 can be directly connected to the air supply pipe 221. For connection between the air supply pipe 221 and the cap member 227 at this time, a connection structure similar to the connection structure between the air supply pipe 221 and the mounting member 229 described above can be employed. In this case, this connection structure that connects the cap member 227 to the air supply pipe 221 constitutes the “attachment mechanism” in the present invention.

上記構成の第２散気装置２２０を用いることによって得られる作用効果として、前述のような空気（気泡）の微細化によって、好気消化槽２１０の被処理水に対する空気中の酸素の溶解効率が高められる（散気エア中の酸素を被処理水により多く溶解させる）という第１の作用効果が挙げられる。この作用効果を確実に達成するための接触部材２２３の具体的な仕様に関し、好ましくは比表面積が４５〜２５０［ｍ２／ｍ３］（更に好ましくは、比表面積が１００〜２００［ｍ２／ｍ３］）であって、空隙率が７０［％］以上（更に好ましくは、空隙率が９０［％］以上）の網状部材を用いることができる。 As an operational effect obtained by using the second air diffuser 220 having the above-described configuration, the efficiency of dissolving oxygen in the air with respect to the water to be treated in the aerobic digestion tank 210 is obtained by the fine air (bubbles) as described above. The first effect is that it is increased (the oxygen in the diffused air is more dissolved in the water to be treated). Regarding the specific specification of the contact member 223 for reliably achieving this effect, the specific surface area is preferably 45 to 250 [m 2 / m 3 ] (more preferably, the specific surface area is 100 to 200 [m 2 / m 3 ]), and a mesh member having a porosity of 70% or more (more preferably, a porosity of 90% or more) can be used.

また、上記構成の第２散気装置２２０によれば、誘導部材２２５及びキャップ部材２２７によって接触部材２２３の概ね下半分が被覆され、特にキャップ部材２２７によって誘導部材２２５の底面が被覆されるため、空気供給管２２１の吐出開口２２２から空気が吐出される際に、接触部材２２３と水貯留領域のうちキャップ部材２２７の下方領域とがキャップ部材２２７を介して遮蔽されることなり、キャップ部材２２７の下方領域から異物を吸入するのが防止されるという第２の作用効果が得られる。なお、第２散気装置２２０の下側の部位からの異物の吸入を考慮しない設計の場合には、必要に応じてキャップ部材２２７を省略することもできる。   Further, according to the second air diffuser 220 configured as described above, the lower half of the contact member 223 is covered with the guide member 225 and the cap member 227, and in particular, the bottom surface of the guide member 225 is covered with the cap member 227. When air is discharged from the discharge opening 222 of the air supply pipe 221, the contact member 223 and a region below the cap member 227 in the water storage region are shielded via the cap member 227, and the cap member 227 A second effect is obtained that foreign matter is prevented from inhaling from the lower region. In addition, in the case of a design that does not consider inhalation of foreign matter from the lower part of the second air diffuser 220, the cap member 227 can be omitted as necessary.

また、上記構成の第２散気装置２２０によれば、少なくとも空気供給管２２１及び接触部材２２３を一体状に構成することによって、例えば第２散気装置２２０に目詰まりが生じたような場合に、接触部材２２３を空気供給管２２１と共に一緒に引き上げることが可能となるという第３の作用効果が得られる。これにより、第２散気装置２２０及び水処理装置１００のメンテナンス作業が円滑化される。また、このような構成は、空気の散気機能と空気の細分化機能を併せ持つ散気装置として、任意の水処理装置に手軽に設置することができ汎用性が高いというメリットがある。   Further, according to the second air diffuser 220 configured as described above, when at least the air supply pipe 221 and the contact member 223 are integrally formed, for example, when the second air diffuser 220 is clogged. As a result, a third function and effect that the contact member 223 can be lifted together with the air supply pipe 221 can be obtained. Thereby, the maintenance work of the 2nd air diffuser 220 and the water treatment apparatus 100 is smoothed. In addition, such a configuration has an advantage that it can be easily installed in any water treatment apparatus as an air diffuser having both an air diffuser function and an air subdivide function, and is highly versatile.

ここで、上記第１の作用効果に関して、具体的には図５が参照される。図５には、本実施例としてのＣＡＳＥ−１（□プロット）と、比較例としてのＣＡＳＥ−２（●プロット）とについて、被処理水に対する酸素溶解効率が示される。ＣＡＳＥ−１は、本実施の形態の第２散気装置２２０を用いて散気する場合とされる一方、ＣＡＳＥ−２は、接触部材２２３のような部材が設けられていない散気装置、すなわち空気供給管２２１のような部材のみからなる散気装置を用いて散気する場合とされる。この酸素溶解効率は、第２散気装置２２０から実際に供給された空気供給量（「送気量」ともいう）Ｑ［Ｌ／ｍｉｎ］と、そのときに水中に溶存した酸素供給量Ｗ［ｋｇ−Ｏ２／ｍ３／ｄ］との関係に基づいて評価される。このときの酸素供給量は、その具体的な記載は省略するが、公知の測定方法（例えば、財団法人日本建築センター、通水試験要領に記載の試験Ｄ：ＤＯ，ＫＬａの測定）にしたがって導出することができる。本発明者は、容量８００［Ｌ］、水深１４００［ｍｍ］の実験槽の槽底部に評価対象の散気装置を設置し、実験水温１５［℃］で測定を行なった。なお、図５中の酸素供給量Ｗは、測定値を既知の補正式によって２０［℃］に換算した値として示している。 Here, FIG. 5 is specifically referred to for the first operational effect. FIG. 5 shows the oxygen dissolution efficiency for water to be treated for CASE-1 (□ plot) as the present example and CASE-2 (● plot) as the comparative example. CASE-1 is assumed to be diffused using the second air diffuser 220 of the present embodiment, while CASE-2 is an air diffuser in which a member such as the contact member 223 is not provided, that is, It is assumed that air is diffused by using an air diffuser composed only of members such as the air supply pipe 221. The oxygen dissolution efficiency is determined by the air supply amount (also referred to as “air supply amount”) Q [L / min] actually supplied from the second air diffuser 220 and the oxygen supply amount W [ It is evaluated based on the relationship between kg-O 2 / m 3 / d]. Although the specific description of the oxygen supply amount at this time is omitted, it is derived according to a known measurement method (for example, test D: measurement of DO, KLa described in Japan Building Center, Water Flow Test Procedure). can do. The present inventor installed an aeration apparatus to be evaluated at the bottom of an experimental tank having a capacity of 800 [L] and a water depth of 1400 [mm], and measured at an experimental water temperature of 15 [° C.]. The oxygen supply amount W in FIG. 5 is shown as a value obtained by converting the measured value to 20 [° C.] by a known correction formula.

図５に示されるように、本実施の形態の第２散気装置２２０を用いることにより、接触部材２２３での気泡細分化作用（「気泡微細化作用」ともいう）によって、被処理水に対する空気中の酸素の溶解効率が高められることが確認された。例えば、本実施の形態に係るＣＡＳＥ−１では、空気供給量Ｑ［Ｌ／ｍｉｎ］が２０〜４０の範囲では、酸素供給量Ｗ［ｋｇ−Ｏ２／ｍ３／ｄ］が１．２〜２．３の範囲で変化し、比較例に係るＣＡＳＥ−２に対して酸素供給量Ｗを概ね０．６〜０．８の範囲で増やすことが可能となる。これにより、汚泥の好気消化に酸素を効率良く使用することが可能となるとともに、酸素溶解効率を高めることで、第２散気装置２２０からの散気エア風量を抑えることができ、第２散気装置２２０に係るエネルギーの省力化が図られる。 As shown in FIG. 5, by using the second air diffuser 220 according to the present embodiment, the air to the water to be treated is caused by the bubble fragmentation action (also referred to as “bubble refinement action”) at the contact member 223. It was confirmed that the dissolution efficiency of oxygen therein was increased. For example, in CASE-1 according to the present embodiment, when the air supply amount Q [L / min] is in the range of 20 to 40, the oxygen supply amount W [kg-O 2 / m 3 / d] is 1.2 to. It changes in the range of 2.3, and it becomes possible to increase the oxygen supply amount W in the range of approximately 0.6 to 0.8 with respect to CASE-2 according to the comparative example. Accordingly, oxygen can be efficiently used for aerobic digestion of sludge, and by increasing the oxygen dissolution efficiency, the amount of air diffused from the second air diffuser 220 can be suppressed. Labor saving of energy related to the air diffuser 220 is achieved.

〔他の実施の形態〕
なお、本発明は上記の実施の形態のみに限定されるものではなく、種々の応用や変形が考えられる。例えば、上記実施の形態を応用した次の各形態を実施することもできる。 [Other Embodiments]
In addition, this invention is not limited only to said embodiment, A various application and deformation | transformation can be considered. For example, each of the following embodiments to which the above embodiment is applied can be implemented.

上記実施の形態の好気消化槽２１０では、好気消化部２１１に濾材が充填されない場合について記載したが、第２散気装置２２０の散気性能等、必要に応じて好気消化部２１１に濾材が充填された構成を採用することができる。本構成については、別実施の形態の水処理装置３００の概要を示す図６が参照される。なお、この図６において図１に示す構成要素と同一の構成要素には同一の符号を付しており、当該同一の構成要素についての説明は省略する。   In the aerobic digestion tank 210 of the above-described embodiment, the case where the filter medium is not filled in the aerobic digestion unit 211 has been described, but the aeration performance of the second aeration device 220 and the like can be changed to the aerobic digestion unit 211 as necessary. A configuration filled with a filter medium can be employed. About this structure, FIG. 6 which shows the outline | summary of the water treatment apparatus 300 of another embodiment is referred. In FIG. 6, the same components as those shown in FIG. 1 are denoted by the same reference numerals, and the description of the same components is omitted.

本発明の「水処理装置」にかかる水処理装置３００では、好気消化部２１１に濾材２１２を充填した構成を採用している。この濾材２１２は、典型的には、前述の嫌気濾床槽１１０の濾材１１２と同様の球状の濾材として構成される。その他として、円筒状、板状、網状などの形状の濾材を用いて濾材２１２を構成してもよい。本構成によれば、嫌気濾床槽１１０から移送される汚泥に含まれる夾雑物がこの濾材２１２によって捕捉されることとなり、第２散気装置２２０や後述する第２エアリフト２３２における目詰まり防止や閉塞防止を図ることが可能となる。また、第２散気装置２２０と、この第２散気装置２２０の上方に配置された濾材２１２との協働によって、第２散気装置２２０で微細化された空気を、更に濾材２１２を通過させることによって微細化作用を高めることが可能となる。   The water treatment apparatus 300 according to the “water treatment apparatus” of the present invention employs a configuration in which the aerobic digestion section 211 is filled with the filter medium 212. The filter medium 212 is typically configured as a spherical filter medium similar to the filter medium 112 of the anaerobic filter bed tank 110 described above. In addition, the filter medium 212 may be configured using a filter medium having a cylindrical shape, a plate shape, a net shape, or the like. According to this configuration, contaminants contained in the sludge transferred from the anaerobic filter bed tank 110 are captured by the filter medium 212, and clogging is prevented in the second air diffuser 220 and the second air lift 232 described later. It becomes possible to prevent occlusion. In addition, by the cooperation of the second air diffuser 220 and the filter medium 212 disposed above the second air diffuser 220, the air refined by the second air diffuser 220 further passes through the filter medium 212. By doing so, it is possible to enhance the miniaturization effect.

また、上記実施の形態では、処理槽本体１０１に装着された装着状態では、第２散気装置２２０の空気供給管２２１が鉛直方向に延在する場合について記載したが、本発明では、空気供給管の延在方向はこの方向に限定されるものではなく、鉛直方向と交差する方向に空気供給管が延在する構成を採用することもできる。   Moreover, in the said embodiment, although the air supply pipe | tube 221 of the 2nd air diffuser 220 extended in the perpendicular direction was described in the mounting state mounted | worn with the processing tank main body 101, in this invention, air supply The extending direction of the pipe is not limited to this direction, and a configuration in which the air supply pipe extends in a direction crossing the vertical direction can also be adopted.

また、上記実施の形態の第２散気装置２２０は、空気供給管２２１と、接触部材２２３、誘導部材２２５及びキャップ部材２２７を備える場合について記載したが、本発明では、少なくとも空気供給管２２１及び接触部材２２３を含む散気装置を用いることができ、必要に応じて誘導部材２２５及びキャップ部材２２７の少なくとも一方を省略することもできる。空気供給管２２１及び接触部材２２３のみからなる散気装置の場合、例えば空気供給管２２１に外表面に接着剤を介して接触部材２２３を直接的に、或いは別部材を介して間接的に接着する構成、空気供給管２２１及び接触部材２２３をボルト・ナット、リベットなどの固定手段によって互いに固定する構成等を用いることによって、散気装置の一体化構造を実現することができる。   Moreover, although the 2nd air diffuser 220 of the said embodiment described the case provided with the air supply pipe 221, the contact member 223, the guide member 225, and the cap member 227, in this invention, at least air supply pipe 221 and An air diffuser including the contact member 223 can be used, and at least one of the guide member 225 and the cap member 227 can be omitted as necessary. In the case of an air diffuser including only the air supply pipe 221 and the contact member 223, for example, the contact member 223 is directly bonded to the outer surface of the air supply pipe 221 via an adhesive or indirectly via another member. By using a configuration, a configuration in which the air supply pipe 221 and the contact member 223 are fixed to each other by fixing means such as bolts, nuts, and rivets, an integrated structure of the air diffuser can be realized.

また、上記実施の形態の第２散気装置２２０では、空気供給管２２１の周りに円筒形状の接触部材２２３を配置する場合について記載したが、本発明では、接触部材は、全体として板片形状、ボール形状（球形状）などの形態であってもよく、例えば円筒状やボール状（球状）の担体ないしろ材が複数充填された充填容器を空気供給管に一体状に取り付けた構成を採用することもできる。   In the second air diffuser 220 according to the above embodiment, the case where the cylindrical contact member 223 is disposed around the air supply pipe 221 has been described. However, in the present invention, the contact member has a plate-like shape as a whole. For example, a configuration in which a packed container filled with a plurality of cylindrical or ball-shaped (spherical) carriers or filter media is integrally attached to the air supply pipe is adopted. You can also

また、上記実施の形態では、第２散気装置２２０が好気性消化を行う好気消化槽２１０に装着される場合について記載したが、本発明では、この第２散気装置２２０のような水処理用散気装置を、特にＳＳ（浮遊物質）成分の多い処理槽に好適に装着することができる。   Moreover, in the said embodiment, although the case where the 2nd air diffuser 220 was mounted | worn with the aerobic digester 210 which performs aerobic digestion was described, in this invention, water like this 2nd air diffuser 220 is used. The treatment air diffuser can be suitably mounted particularly on a treatment tank having a lot of SS (floating matter) components.

また、上記実施の形態の水処理装置１００では、水処理機構１０１ａが、嫌気処理槽１１０、接触ばっ気槽１３０、第１沈殿槽１５０、消毒槽１７０、好気消化槽２１０及び第２沈殿槽２３０の処理要素によって構成される場合について記載したが、処理要素の数や種類に関しては必要に応じて種々選択が可能である。   Moreover, in the water treatment apparatus 100 of the said embodiment, the water treatment mechanism 101a has the anaerobic treatment tank 110, the contact aeration tank 130, the 1st precipitation tank 150, the disinfection tank 170, the aerobic digestion tank 210, and the 2nd precipitation tank. Although the case of 230 processing elements has been described, various numbers and types of processing elements can be selected as necessary.

１００…水処理装置
１０１…処理槽本体
１０２…流入管
１０３…流出管
１０４…マンホール部
１１０…嫌気濾床槽
１１１…濾床
１１２…濾材
１１４…移流開口
１３０…接触ばっ気槽
１３１…充填部
１３２…接触材
１３４…第１散気装置
１３５…開口部
１５０…第１沈殿槽
１５１…開口部
１５２…第１エアリフト
１５３…底部領域
１７０…消毒槽
１７１…薬剤筒
２１０…好気消化槽
２１１…好気消化部
２１２…濾材
２１４…開口部
２２０…第２散気装置
２２１…空気供給管
２２１ａ…第１の先端領域
２２１ｂ…第２の先端領域
２２２…吐出開口
２２３…接触部材
２２３ａ…骨格部
２２３ｂ…空間部
２２３ｃ…外表面
２２５…誘導部材
２２５ａ…内壁面
２２５ｂ…下側端部
２２５ｃ…上側端部
２２７…キャップ部材
２２９…取り付け部材
２３０…第２沈殿槽
２３１…移流開口
２３２…第２エアリフト
３００…水処理装置 DESCRIPTION OF SYMBOLS 100 ... Water treatment apparatus 101 ... Treatment tank main body 102 ... Inflow pipe 103 ... Outflow pipe 104 ... Manhole part 110 ... Anaerobic filter bed tank 111 ... Filter bed 112 ... Filter medium 114 ... Advection opening 130 ... Contact aeration tank 131 ... Filling part 132 ... Contact material 134 ... First air diffuser 135 ... Opening part 150 ... First sedimentation tank 151 ... Opening part 152 ... First air lift 153 ... Bottom area 170 ... Disinfection tank 171 ... Chemical cylinder 210 ... Aerobic digestion tank 211 ... Good Air digester 212 ... Filter medium 214 ... Opening part 220 ... Second air diffuser 221 ... Air supply pipe 221a ... First tip region 221b ... Second tip region 222 ... Discharge opening 223 ... Contact member 223a ... Skeletal part 223b ... Space 223c ... outer surface 225 ... guide member 225a ... inner wall surface 225b ... lower end 225c ... upper end 227 ... cap member 2 9 ... mounting members 230 ... second precipitation tank 231 ... advection opening 232 ... second air-lift 300 ... water treatment apparatus

Claims (6)

被処理水を処理する水処理装置に装着される水処理用散気装置であって、
空気供給源に接続され、前記水処理装置のうち被処理水が貯留される水貯留領域に配設される空気供給管と、
前記空気供給管に設けられ、前記空気供給管内を流れた空気を吐出する吐出開口と、
前記吐出開口から吐出された空気と接触して当該空気を細分化する網状の接触部材と、
前記網状の接触部材を前記空気供給管に一体状に取り付ける取り付け機構と、
を含む構成であり、
前記接触部材は、前記空気供給管が挿設される中空部分を有するとともに、ヘチマ状の骨格部からなる網状骨格体として構成されており、
前記水処理装置に装着された状態では、前記空気供給管が前記水貯留領域内を鉛直方向に長尺状に延在し、
前記空気供給管は、前記空気供給源から供給された空気を流通させる流通管として、前記鉛直方向に延在する鉛直部分と、前記鉛直部分に連通するとともに前記鉛直方向に交差する方向に延在する交差部分と、を有し、
前記吐出開口は、前記鉛直部分と前記交差部分のうち、少なくとも前記交差部分に設けられており、
前記取り付け機構は、前記鉛直部分が前記接触部材の中空部分を貫通した状態で、前記交差部分が前記接触部材の下方領域に配置され、これにより前記接触部材が前記空気供給管の前記交差部分に支持されて当該空気供給管に一体状に取り付けられるように構成されており、
前記接触部材には、前記接触部材の下方から前記吐出開口から吐出された空気が供給され、当該空気が前記接触部材内を前記鉛直方向に移動して前記接触部材によって細分化されるように構成されていることを特徴とする水処理用散気装置。 A water treatment air diffuser attached to a water treatment device for treating water to be treated,
An air supply pipe connected to an air supply source and disposed in a water storage region in which water to be treated is stored in the water treatment device;
A discharge opening that is provided in the air supply pipe and discharges air flowing through the air supply pipe;
A net-like contact member that contacts air discharged from the discharge opening and subdivides the air;
An attachment mechanism for integrally attaching the mesh-shaped contact member to the air supply pipe;
Including
The contact member has a hollow portion into which the air supply pipe is inserted, and is configured as a reticulated skeleton body including a loofah skeleton portion,
In the state attached to the water treatment device, the air supply pipe extends in the vertical direction in the water storage region,
The air supply pipe is a flow pipe that circulates air supplied from the air supply source, and a vertical portion that extends in the vertical direction, and communicates with the vertical portion and extends in a direction that intersects the vertical direction. a cross portion and a,
The discharge opening is provided at least in the intersecting portion of the vertical portion and the intersecting portion,
In the mounting mechanism, the intersecting portion is disposed in a lower region of the contact member in a state where the vertical portion penetrates the hollow portion of the contact member, whereby the contact member is disposed at the intersecting portion of the air supply pipe. It is configured to be supported and attached integrally to the air supply pipe ,
The contact member is configured such that air discharged from the discharge opening is supplied from below the contact member, and the air moves in the contact member in the vertical direction and is subdivided by the contact member. An air diffuser for water treatment, characterized in that 請求項１に記載の水処理用散気装置であって、
前記接触部材は、少なくとも前記吐出開口において前記空気供給管の全周を被覆する円筒形状として構成されていることを特徴とする水処理用散気装置。 A water treatment aeration device according to claim 1,
The air diffusion device for water treatment, wherein the contact member is configured in a cylindrical shape covering the entire circumference of the air supply pipe at least in the discharge opening. 請求項２に記載の水処理用散気装置であって、
前記接触部材の底面を被覆する被覆部材を備える構成であることを特徴とする水処理用散気装置。 A water treatment aeration device according to claim 2,
An air diffuser for water treatment, comprising a covering member that covers the bottom surface of the contact member. 請求項２又は３に記載の水処理用散気装置であって、
前記接触部材の周面を被覆する円筒形状の第２の被覆部材を備え、
前記接触部材は、前記鉛直方向に関する下方側の先端領域と、前記先端領域よりも上方側の基端領域とを有し、
前記第２の被覆部材は、前記接触部材のうち前記先端領域の周面を被覆する構成であることを特徴とする水処理用散気装置。 It is a diffuser for water treatment according to claim 2 or 3,
A cylindrical second covering member covering the peripheral surface of the contact member;
The contact member has a lower distal end region with respect to the vertical direction, and a proximal end region above the distal end region,
The second covering member is configured to cover a peripheral surface of the tip region of the contact member. 処理槽本体に、被処理水が貯留される水貯留領域と、原水が前記水貯留領域に流入するのを許容する流入管と、前記水貯留領域にて処理された後の水が前記処理槽本体から流出するのを許容する流出管と、前記水貯留領域に空気を散気する散気装置と含む水処理装置であって、
前記散気装置として、請求項１〜４のうちのいずれか一項に記載の水処理用散気装置を用いた構成であることを特徴とする水処理装置。 The treatment tank main body has a water storage area in which treated water is stored, an inflow pipe that allows raw water to flow into the water storage area, and water that has been treated in the water storage area is the treatment tank. A water treatment device including an outflow pipe that allows outflow from the main body, and an air diffuser that diffuses air into the water storage region,
The water treatment apparatus characterized by using the water treatment aeration apparatus according to any one of claims 1 to 4 as the aeration apparatus. 請求項５に記載の水処理装置であって、
前記水貯留領域は、被処理水に含まれる汚泥の好気消化を行なう好気消化部を含み、当該好気消化部に前記水処理用散気装置の前記空気供給管が配設された構成であることを特徴とする水処理装置。

The water treatment device according to claim 5,
The water storage area includes an aerobic digester that performs aerobic digestion of sludge contained in the water to be treated, and the air supply pipe of the water treatment air diffuser is disposed in the aerobic digester. The water treatment apparatus characterized by being.

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