JP2002126773A - Wastewater treatment apparatus and method - Google Patents

Wastewater treatment apparatus and method

Info

Publication number
JP2002126773A
JP2002126773A JP2000331286A JP2000331286A JP2002126773A JP 2002126773 A JP2002126773 A JP 2002126773A JP 2000331286 A JP2000331286 A JP 2000331286A JP 2000331286 A JP2000331286 A JP 2000331286A JP 2002126773 A JP2002126773 A JP 2002126773A
Authority
JP
Japan
Prior art keywords
wastewater treatment
carrier
movable member
tank
stirring
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP2000331286A
Other languages
Japanese (ja)
Inventor
Eiichi Suzuki
栄一 鈴木
Hiroshi Suzuki
弘 鈴木
Nobuo Sugibayashi
伸夫 杉林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujiclean Co Ltd
Original Assignee
Fujiclean Co Ltd
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 Fujiclean Co Ltd filed Critical Fujiclean Co Ltd
Priority to JP2000331286A priority Critical patent/JP2002126773A/en
Publication of JP2002126773A publication Critical patent/JP2002126773A/en
Pending legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Accessories For Mixers (AREA)
  • Biological Treatment Of Waste Water (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide rational wastewater treatment technique capable of certainly stirring and dispersing the lumpy object accumulated in wastewater. SOLUTION: In a wastewater treatment apparatus 1, a carrier stirring member 60 for stirring and dispersing a granular carrier C3 forming the lumpy object is arranged in a carrier fluidizing biological filter tank 30. The carrier stirring member 60 has a handle part 61, a shaft part 62, a stirring part 63 or the like and the stirring part 63 is arranged so as to be embedded in the granular carrier C3. When a worker grasps the handle part 61 of the carrier stirring member 60 to move the same in the direction shown by the arrow 90 or 92 in a drawing, the stirring part 63 is revolved in the direction shown by the arrow 94 in the drawing or moved up and down in the direction shown by the arrow 96 to generate stirring force in the stirring part 63. By this constitution, when the stirring part 63 comes into contact with the granular carrier C3 forming the lumpy body, the lumpy granular carrier C3 is stirred to be dispersed in water to be treated.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、排水処理技術に係
り、詳しくは排水中に堆積した堆積物の塊状体を攪拌し
て分散させる技術に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wastewater treatment technique, and more particularly, to a technique for stirring and dispersing a lump of sediment deposited in wastewater.

【０００２】[0002]

【従来の技術】例えば、一般家庭から排出された家庭用
排水を処理する排水処理装置として、上流側から順に嫌
気濾床槽、担体流動生物濾過槽、処理水槽および消毒槽
が配置された構成のものがある。このような排水処置装
置の担体流動生物濾過槽では、例えば運転負荷が高い場
合や逆洗運転が正常に行われない場合に、槽内に充填さ
れた粒状担体が排水中に含まれるＳＳ（suspended soli
d）等によって固着する。そして、粒状担体が固着する
と該担体の流動が規制されるうえに被処理水の通過が阻
止され、排水処理自体を行うことができなくなるという
問題が生じる。そこで従来の担体流動生物濾過槽は、粒
状担体の固着が発生した場合に、該担体へポンプ等から
高圧の洗浄水あるいは洗浄エアーを吹き付けることで塊
状の粒状担体を攪拌して分散させるように構成されてい
た。2. Description of the Related Art For example, as a wastewater treatment apparatus for treating domestic wastewater discharged from a general household, an anaerobic filter bed tank, a carrier fluidized biological filtration tank, a treated water tank, and a disinfection tank are arranged in this order from the upstream side. There is something. In such a carrier-flowing biological filtration tank of a wastewater treatment apparatus, for example, when the operation load is high or when the backwashing operation is not performed normally, the SS (suspended) in which the granular carrier filled in the tank is contained in the wastewater. soli
d) etc. When the granular carrier adheres, the flow of the carrier is restricted and the passage of the water to be treated is prevented, so that the wastewater treatment itself cannot be performed. Therefore, the conventional carrier fluidized biological filtration tank is configured such that when sticking of the granular carrier occurs, high-pressure washing water or washing air is sprayed from the pump or the like to the carrier to stir and disperse the massive granular carrier. It had been.

【０００３】[0003]

【発明が解決しようとする課題】しかしながら上記のよ
うな水洗浄装置やエアー洗浄装置は、設備が大掛かりり
になりコストが高くなるという問題がある。なお、粒状
担体の固着のように槽内の堆積物が塊状体を形成すると
いう問題は、上記担体流動生物濾過槽に限らず堆積物が
生成する種々の処理槽に一般に発生するものである。However, the above-mentioned water washing apparatus and air washing apparatus have a problem that the equipment is large and the cost is high. The problem that the sediment in the tank forms a lump, such as the sticking of the granular carrier, generally occurs not only in the above-mentioned carrier fluidized biological filtration tank but also in various treatment tanks where the sediment is generated.

【０００４】そこで、本発明は、以上のような点に鑑み
てなされたものであり、その目的とするところは、排水
中に堆積する堆積物の塊状体を低コストで確実に攪拌し
分散させることができる合理的な排水処理技術を提供す
ることである。Accordingly, the present invention has been made in view of the above points, and an object of the present invention is to reliably stir and disperse a lump of sediment deposited in drainage at low cost. Is to provide reasonable wastewater treatment technology.

【０００５】[0005]

【課題を解決するための手段】前記課題を解決するため
に、本発明の排水処理装置は請求項１〜４に記載の通り
に構成されている。また、本発明の排水処理方法は請求
５〜８に記載の通りである。In order to solve the above-mentioned problems, a wastewater treatment apparatus according to the present invention is configured as described in claims 1 to 4. The wastewater treatment method of the present invention is as described in claims 5 to 8.

【０００６】請求項１に記載の排水処理装置において、
可動部材は支持部材を介して処理槽内に取付けられてい
る。また、可動部材は排水中に堆積した堆積物、例えば
処理槽内に充填された粒状担体に対して移動させること
ができる。そして、堆積物が塊状体を形成した場合に、
この塊状体を可動手段によって攪拌し分散させることが
できる。ここでいう「堆積物」には、例えば、排水処理
で用いられる担体をはじめ、排水中のＳＳ（suspended
solid）や種々のスケールまたこれらが複合したもの
等、排水中に堆積するものを広く含むものとする。ま
た、「塊状体」とは、堆積物が物理的に固着して塊状を
なしている場合や、電気的に引き合って塊状をなしてい
る場合等の形態を広く含むものとする。従って、「攪
拌」とはこれら塊状体の結合の一部あるいは全部を解除
することであり、塊状体を内部から押し崩すような態様
や塊状体を外部から突き崩すような態様等を広く含むも
のとする。また、本発明でいう「可動部材」とは、排水
中に堆積した堆積物に対して移動可能なものであればよ
く、その形状は棒状、パイプ状等種々の形状を採り得
る。例えば、棒状に形成された可動部材は複雑な構造を
必要としないため、安価な可動部材を実現することがで
きる。以上のように、請求項１に記載した排水処理装置
によれば、排水中に堆積する堆積物の塊状体を低コスト
で確実に攪拌し分散させることができる。[0006] In the wastewater treatment apparatus according to claim 1,
The movable member is mounted in the processing tank via a support member. Further, the movable member can be moved with respect to the deposits accumulated in the drainage, for example, the granular carriers filled in the treatment tank. And when the sediment forms a lump,
This lump can be stirred and dispersed by the movable means. The term “sediment” used herein includes, for example, a carrier used in wastewater treatment, and SS (suspended) in wastewater.
solids, various scales, and composites of these, including those that accumulate in wastewater. In addition, the term “lump” broadly includes a form in which the deposit is physically fixed to form a lump, and a form in which the deposit is electrically attracted to form a lump. Therefore, "stirring" is to release a part or all of the connection of these aggregates, and includes a wide range of modes such as pushing the mass from the inside and pushing the mass from the outside. . In addition, the “movable member” in the present invention may be any member that can move with respect to the deposits accumulated in the drainage water, and may take various shapes such as a rod shape and a pipe shape. For example, since a movable member formed in a rod shape does not require a complicated structure, an inexpensive movable member can be realized. As described above, according to the wastewater treatment apparatus of the first aspect, it is possible to reliably stir and disperse the lump of deposits deposited in the wastewater at low cost.

【０００７】また、請求項２に記載の排水処理装置にお
いて、可動部材は、該可動部材を支持する支持部材の挿
通孔に対して回動および挿通させることができる。そし
て、可動部材を、支持部材によって支持された状態で回
動や挿通させることによって堆積物の塊状体を攪拌し分
散させることができる。可動部材は支持部材に支持され
た状態で動作されるため、可動部材は挿通孔に対して円
滑に動作されることとなる。なお、可動部材の回動動作
や挿通動作は手動操作で行われるのが好ましい。これに
より、例えば可動部材の端部に操作用の取っ手を設けた
簡単な構成の可動部材を実現することができる。Further, in the wastewater treatment apparatus according to the second aspect, the movable member can be rotated and inserted into an insertion hole of a support member that supports the movable member. Then, by rotating or inserting the movable member while being supported by the support member, the lump of deposits can be agitated and dispersed. Since the movable member is operated while being supported by the support member, the movable member is smoothly operated with respect to the insertion hole. Note that it is preferable that the turning operation and the insertion operation of the movable member be performed manually. Thereby, for example, a movable member having a simple configuration in which an operation handle is provided at an end of the movable member can be realized.

【０００８】また、請求項３に記載の排水処理装置にお
いて、可動部材は堆積物の塊状体に高圧流体を供給する
機能を備えている。堆積物の塊状体に高圧流体を吹き付
けることによって、塊状体の攪拌が促進されより分散し
易くなる。換言すれば、高圧流体とは、吹き付けによっ
て塊状体を攪拌して分散させることができる程度の圧力
を有する流体であればよい。高圧流体としては、例えば
高圧エアーや高圧水等がある。そして、可動部材による
動作に加えて堆積物の塊状体に高圧エアー流あるいは高
圧水流を付与することによって、より迅速に塊状体を攪
拌し分散させることができる。Further, in the wastewater treatment apparatus according to the third aspect, the movable member has a function of supplying a high-pressure fluid to the sediment mass. By spraying the high-pressure fluid on the sedimentary lump, the agitation of the lump is promoted and the lump is more easily dispersed. In other words, the high-pressure fluid may be a fluid having a pressure enough to agitate and disperse the lump by spraying. Examples of the high-pressure fluid include high-pressure air and high-pressure water. Then, by applying a high-pressure air flow or a high-pressure water flow to the lump of sediment in addition to the operation by the movable member, the lump can be stirred and dispersed more quickly.

【０００９】また、請求項４に記載の排水処理装置にお
いて、可動部材は粒状担体が充填された処理槽に設けら
れている。例えば排水処理においてＳＳ等の被濾過物の
濾過に用いられる粒状担体は、ＳＳ等によって固着を起
こし塊状体を形成し易い。このような場合に可動部材を
用いることで、低コストで確実に堆積物の塊状体を分散
させることができる。Further, in the wastewater treatment apparatus according to the fourth aspect, the movable member is provided in a treatment tank filled with granular carriers. For example, in a wastewater treatment, a granular carrier used for filtration of an object to be filtered such as SS is easily fixed by SS or the like and easily forms a lump. In such a case, by using the movable member, it is possible to reliably disperse the lump of deposits at low cost.

【００１０】また、請求項５に記載の排水処理方法にお
いて、所定の操作を順次実施することによって、排水中
に堆積する堆積物の塊状体を低コストで確実に攪拌し分
散させることができる。[0010] In the wastewater treatment method according to the fifth aspect, by sequentially performing the predetermined operation, it is possible to surely stir and disperse the lump of deposits deposited in the wastewater at low cost.

【００１１】また、請求項６に記載の排水処理方法にお
いて、所定の操作を順次実施することによって、排水中
に堆積する堆積物の塊状体を低コストで確実に攪拌し分
散させることができるうえに可動部材の動作を円滑に行
うことができる。Further, in the wastewater treatment method according to the sixth aspect, by sequentially performing predetermined operations, it is possible to surely stir and disperse a lump of sediment deposited in the wastewater at low cost. The operation of the movable member can be performed smoothly.

【００１２】また、請求項７に記載の排水処理方法にお
いて、所定の操作を順次実施することによって、より迅
速に堆積物の塊状体を攪拌し分散させることができる。Further, in the wastewater treatment method according to the present invention, by sequentially performing a predetermined operation, it is possible to agitate and disperse the lump of sediment more quickly.

【００１３】また、請求項８に記載の排水処理方法にお
いて、所定の操作を順次実施することによって、ＳＳ等
の被濾過物の濾過に用いられる粒状担体が充填された処
理槽において、可動部材を用いることで低コストで確実
に塊状体を攪拌し分散させることができる。[0013] In the wastewater treatment method according to the eighth aspect, by sequentially performing a predetermined operation, the movable member in the treatment tank filled with the particulate carrier used for filtering the material to be filtered such as SS is removed. By using it, it is possible to reliably stir and disperse the lump at low cost.

【００１４】[0014]

【発明の実施の形態】以下に、本発明における一実施の
形態の排水処理槽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、一般家庭等から排出される排水
の処理技術について説明するものである。ここで、図１
は本発明における一実施の形態の排水処理槽の概略を示
す概略図である。図２は担体流動生物濾過槽３０の模式
図である。図３は担体攪拌部材６０の構成を示す斜視図
であり、図４は担体攪拌部材６０の取付構造を示す斜視
図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of a wastewater treatment tank according to an embodiment of the present invention will be described below with reference to the drawings.
The present embodiment describes a technology for treating wastewater discharged from a general household or the like. Here, FIG.
1 is a schematic view showing an outline of a wastewater treatment tank according to an embodiment of the present invention. FIG. 2 is a schematic diagram of the carrier flowing biological filtration tank 30. FIG. 3 is a perspective view showing a configuration of the carrier stirring member 60, and FIG. 4 is a perspective view showing a mounting structure of the carrier stirring member 60.

【００１５】図１に示すように、本発明における排水処
理装置としての排水処理槽１には、例えば一般家庭から
排出された家庭用排水を排水処理槽１へ受入れるための
流入管２と、浄化処理された処理水を排水処理槽１から
放流するための放流管３が設けられ、流入管２から受入
れられた排水は、排水処理槽１で連続的に浄化処理され
るように構成されている。As shown in FIG. 1, a wastewater treatment tank 1 serving as a wastewater treatment apparatus according to the present invention includes, for example, an inflow pipe 2 for receiving domestic wastewater discharged from a general household into the wastewater treatment tank 1, and a purification pipe. A discharge pipe 3 for discharging the treated water from the wastewater treatment tank 1 is provided, and the wastewater received from the inflow pipe 2 is configured to be continuously purified in the wastewater treatment tank 1. .

【００１６】排水処理槽１は、処理行程の順に対応し
て、上流（図１中の左側）から第１嫌気濾床槽１０、第
２嫌気濾床槽２０、担体流動生物濾過槽３０（本発明に
おける処理槽に対応している）、処理水槽４０、消毒槽
５０を備えている。また、第１嫌気濾床槽１０と第２嫌
気濾床槽２０とは仕切壁４によって区画され、第２嫌気
濾床槽２０と担体流動生物濾過槽３０とは仕切壁５によ
って区画されている。また、担体流動生物濾過槽３０と
処理水槽４０とは仕切壁６によって区画され、処理水槽
４０と消毒槽５０とは越流堰７によって区画されてい
る。The wastewater treatment tank 1 comprises a first anaerobic filter bed tank 10, a second anaerobic filter bed tank 20, and a carrier fluidized biological filtration tank 30 (from the upstream (left side in FIG. 1)) in the order of the treatment process. (Corresponding to the processing tank in the present invention), a processing water tank 40, and a disinfecting tank 50. Further, the first anaerobic filter bed tank 10 and the second anaerobic filter bed tank 20 are partitioned by a partition wall 4, and the second anaerobic filter bed tank 20 and the carrier fluidized biological filtration tank 30 are partitioned by a partition wall 5. . The carrier flowing biological filtration tank 30 and the treated water tank 40 are partitioned by the partition wall 6, and the treated water tank 40 and the disinfecting tank 50 are partitioned by the overflow weir 7.

【００１７】すなわち、流入管２から受入れられた排水
は、まず第１嫌気濾床槽１０で処理され、次いで第１嫌
気濾床槽１０から仕切壁４を越えて第２嫌気濾床槽２０
へ移流し、第２嫌気濾床槽２０で処理される。また、第
２嫌気濾床槽２０で処理された処理水は、仕切壁５を越
えて担体流動生物濾過槽３０へ移流し、担体流動生物濾
過槽３０で処理される。また、担体流動生物濾過槽３０
で処理された処理水は処理水槽４０へ移流する。処理水
槽４０内の処理水は、その一部はエアリフトポンプ７
０、配管７２を介して第１嫌気濾床槽１０へ戻され、残
りは越流堰７を越えて消毒槽５０へ移流し、その後、放
流管３から系外へ放流されるように構成されている。処
理水槽４０のエアリフトポンプ７０は、エアーリフト式
の流体移送構造を有している。すなわち、エアリフトポ
ンプ７０にエアー配管（図示省略）が接続されており、
エアリフトポンプ７０にエアーが供給されることで、そ
のエアー流によって処理水槽４０の処理水が第１嫌気濾
床槽１０へ移送されることとなる。That is, the wastewater received from the inflow pipe 2 is first treated in the first anaerobic filter tank 10, and then from the first anaerobic filter tank 10 across the partition wall 4 to the second anaerobic filter tank 20.
And treated in the second anaerobic filter bed tank 20. Further, the treated water treated in the second anaerobic filter bed tank 20 is transferred to the carrier fluidized biological filtration tank 30 over the partition wall 5 and treated in the carrier fluidized biological filtration vessel 30. In addition, the carrier flowing biological filtration tank 30
The treated water treated in the above is transferred to the treated water tank 40. Part of the treated water in the treated water tank 40 is the air lift pump 7
0, it is configured to be returned to the first anaerobic filter bed tank 10 via the pipe 72, the remainder is transferred to the disinfection tank 50 over the overflow weir 7, and then discharged from the discharge pipe 3 to the outside of the system. ing. The air lift pump 70 of the treatment water tank 40 has an air lift type fluid transfer structure. That is, an air pipe (not shown) is connected to the air lift pump 70,
When the air is supplied to the air lift pump 70, the treated water in the treated water tank 40 is transferred to the first anaerobic filter bed tank 10 by the air flow.

【００１８】次に、排水処理槽１の各槽の構成を詳細に
説明する。まず、嫌気濾床槽１０，２０には各々濾床１
１，２１が形成され、この濾床１１，２１には、有機汚
濁物質を嫌気性分解する嫌気性微生物を着床させた所定
量の濾材Ｃ１，Ｃ２が充填されている。そして、嫌気濾
床槽１０，２０で処理された処理水は、各々濾床１１，
２１を図１中の矢印方向へ降流するように構成されてい
る。また、消毒槽５０は消毒剤注入装置（図示省略）を
備えており、放流する前の処理水を消毒するように構成
されている。Next, the configuration of each tank of the wastewater treatment tank 1 will be described in detail. First, each of the anaerobic filter bed tanks 10 and 20 has one filter bed.
The filter beds 11 and 21 are filled with a predetermined amount of filter media C1 and C2 on which anaerobic microorganisms that anaerobically decompose organic pollutants are implanted. Then, the treated water treated in the anaerobic filter bed tanks 10 and 20 is separated into the filter beds 11 and
21 is configured to flow down in the direction of the arrow in FIG. The disinfecting tank 50 includes a disinfectant injection device (not shown), and is configured to disinfect treated water before being discharged.

【００１９】図２に示すように、担体流動生物濾過槽３
０の槽本体３１には上部多孔部材３８および下部多孔部
材３９が設けられ、それら多孔部材間の担体充填部３２
に有機汚濁物質を好気性分解する好気性微生物を着床さ
せた所定量の粒状担体Ｃ３が槽内を流動できる程度に充
填されている。この粒状担体Ｃ３は、例えば粒状の中空
円筒形に形成されている。多孔部材３８，３９は被処理
水の移動は許容するが担体Ｃ３の移動は防止するように
構成されている。また、担体流動生物濾過槽３０には、
槽内へエアーを供給するための第１散気装置３５および
第２散気装置３６が設けられている。第２散気装置３６
は槽内の底部に設けられ、後述する逆洗運転時に用いら
れる。一方第１散気装置３５は第２散気装置３６よりも
上方に設けられ、後述する通常運転時に用いられる。そ
して、これら散気装置からエアーが供給されることで、
担体Ｃ３は被処理水とともに槽内を流動するように構成
されている。なお、第１散気装置３５の散気管よりも上
層に通常運転時における好気性処理領域３３（生物処理
領域）が形成され、第１散気装置３５の散気管よりも下
層に通常運転時における濾過領域３４が形成される。As shown in FIG.
The tank body 31 is provided with an upper porous member 38 and a lower porous member 39, and a carrier filling portion 32 between the porous members.
A predetermined amount of granular carrier C3 in which aerobic microorganisms that aerobicly decompose organic pollutants are implanted is filled to the extent that it can flow in the tank. The granular carrier C3 is formed, for example, in a granular hollow cylindrical shape. The porous members 38 and 39 are configured to allow movement of the water to be treated but prevent movement of the carrier C3. In addition, the carrier flowing biological filtration tank 30 includes:
A first air diffuser 35 and a second air diffuser 36 for supplying air into the tank are provided. Second air diffuser 36
Is provided at the bottom in the tank, and is used at the time of a backwash operation described later. On the other hand, the first air diffuser 35 is provided above the second air diffuser 36, and is used during normal operation described later. And air is supplied from these air diffusers,
The carrier C3 is configured to flow in the tank together with the water to be treated. Note that an aerobic treatment region 33 (biological treatment region) during normal operation is formed above the air diffuser tube of the first air diffuser 35, and a lower layer than the air diffuser tube of the first air diffuser 35 during normal operation. A filtration area 34 is formed.

【００２０】図３に示すように、担体流動生物濾過槽３
０には、金属製の中空パイプによって形成された担体攪
拌部材６０（本発明における可動部材に対応している）
が設けられている。この担体攪拌部材６０は、取っ手部
６１、軸部６２、攪拌部６３等により構成されている。
また、担体攪拌部材６０の攪拌部６３は粒状担体Ｃ３中
に埋設された状態で配置されている。作業者がこの担体
攪拌部材６０の取っ手部６１を掴んで図中の矢印９０方
向あるいは矢印９２方向へ動かすことによって、攪拌部
６３は図中の矢印９４方向へ回動され、あるいは矢印９
６方向へ上下動され、これにより攪拌部６３に攪拌力が
発生する。これにより、ＳＳ（suspended solid）等の
被濾過物の固着によって塊状体を形成した粒状担体Ｃ３
に攪拌部６３が当接した際に、塊状の粒状担体Ｃ３が攪
拌され被処理水中で分散することとなる。[0020] As shown in FIG.
0 is a carrier stirring member 60 formed by a metal hollow pipe (corresponding to a movable member in the present invention).
Is provided. The carrier stirring member 60 includes a handle portion 61, a shaft portion 62, a stirring portion 63, and the like.
Further, the stirring section 63 of the carrier stirring member 60 is disposed so as to be buried in the granular carrier C3. When the operator grips the handle 61 of the carrier stirring member 60 and moves it in the direction of arrow 90 or 92 in the drawing, the stirring section 63 is rotated in the direction of arrow 94 in the drawing or the direction of arrow 9.
It is moved up and down in six directions, thereby generating a stirring force in the stirring section 63. As a result, the granular carrier C3 which has formed a lump by adhering an object to be filtered such as a SS (suspended solid) is formed.
When the agitating section 63 comes into contact with the agglomerated material, the massive granular carrier C3 is agitated and dispersed in the water to be treated.

【００２１】なお、担体攪拌部材６０は、取っ手部６１
にコネクタ等の接続手段を介してエアー供給源や水供給
源（本発明の流体供給手段に対応している）を接続可能
に構成されており、エアー供給源や水供給源から供給さ
れた高圧エアーや高圧水は、担体攪拌部材６０の中空部
を通って攪拌部６３から吹き付けられることとなる。こ
の高圧エアーや高圧水の圧力は、塊状の粒状担体Ｃ３を
攪拌し分散させる程度であればよく、粒状担体Ｃ３の固
着状態等に応じて適宜設定可能である。この高圧エアー
や高圧水の供給を攪拌部６３の作動に合わせて行うこと
で、塊状の粒状担体Ｃ３をより迅速に攪拌し分散させる
ことができる。The carrier agitating member 60 includes a handle 61
An air supply source and a water supply source (corresponding to the fluid supply means of the present invention) can be connected to the air supply source via a connection means such as a connector. Air or high-pressure water is blown from the stirring unit 63 through the hollow portion of the carrier stirring member 60. The pressure of the high-pressure air or high-pressure water only needs to be such that the massive granular carrier C3 is stirred and dispersed, and can be appropriately set according to the state of fixation of the granular carrier C3. By supplying the high-pressure air or high-pressure water in accordance with the operation of the stirring section 63, the massive granular carrier C3 can be stirred and dispersed more quickly.

【００２２】担体攪拌部材６０の取っ手部６１は、図４
に示すように槽本体３１に固定されたアーム部材８０に
着脱可能に構成されている。すなわち、アーム部材８０
は取っ手部６１の外面形状に対応した保持爪体８０ａを
有しており、保持爪体８０ａが弾性変形することで取っ
手部６１が保持爪体８０ａ内に嵌め込まれるようになっ
ている。そして、アーム部材８０によって取っ手部６１
を保持することで、担体攪拌部材６０を使用しない場合
の不用意な動きが阻止される。The handle 61 of the carrier stirring member 60 is shown in FIG.
As shown in FIG. 7, the arm member 80 is fixed to the tank body 31 so as to be detachable. That is, the arm member 80
Has a holding claw 80a corresponding to the outer shape of the handle 61, and the handle 61 is fitted into the holding claw 80a by elastically deforming the holding claw 80a. And the handle part 61 is formed by the arm member 80.
, The careless movement when the carrier stirring member 60 is not used is prevented.

【００２３】担体攪拌部材６０の軸部６２は、上部多孔
部材３８および槽本体３１の内壁に固定されたアングル
部材３７の挿通孔３８ａ，３７ａに挿入され、上部多孔
板３８に対し回動可能および上下動可能に支持されてい
る。従って、担体攪拌部材６０を使用する場合には、図
４中の二点鎖線で示すようにアーム部材８０による取っ
手部６１の保持を解除することで、担体攪拌部材６０は
攪拌のための回動および上下動が可能となる。なお、上
部多孔部材３８、アングル部材３７等によって本発明に
おける支持部材が構成されている。The shaft portion 62 of the carrier stirring member 60 is inserted into insertion holes 38a, 37a of the upper porous member 38 and the angle member 37 fixed to the inner wall of the tank body 31, and is rotatable with respect to the upper porous plate 38. It is supported so that it can move up and down. Accordingly, when the carrier stirring member 60 is used, the holding of the handle portion 61 by the arm member 80 is released as shown by a two-dot chain line in FIG. And vertical movement is possible. The support member in the present invention is constituted by the upper porous member 38, the angle member 37, and the like.

【００２４】なお、本実施の形態では上部多孔部材３８
およびアングル部材３７の挿通孔３８ａ，３７ａに担体
攪拌部材６０の軸部６２が挿入される場合について記載
したが、上部多孔部材３８を有していない処理槽では、
例えば図５に示すように担体攪拌部材６０を取付けるこ
とができる。ここで図５は担体攪拌部材６０の別の実施
の形態の取付構造を示す斜視図である。なお、この図に
おいて図４中の要素と同一の要素には同一の符号を付し
ている。図５に示すように、槽本体３１に内壁にアーム
部材８２およびアングル部材３７が固定されており、担
体攪拌部材６０はアーム部材８２およびアングル部材３
７の挿通孔８２ａ，３７ａに挿入されている。アーム部
材８２は、アーム部材８０と同様に取っ手部６１の外面
形状に対応した保持爪体８２ａを有しており、取っ手部
６１が保持爪体８２ａ内に嵌め込まれることで、担体攪
拌部材６０はアーム部材８２に対して回動可能および上
下動可能に支持されることとなる。このように構成すれ
ば、上部多孔部材３８を有していない処理槽においても
担体攪拌部材６０を簡便に取付けることができる。In this embodiment, the upper porous member 38 is used.
Although the case where the shaft portion 62 of the carrier stirring member 60 is inserted into the insertion holes 38a and 37a of the angle member 37 has been described, in the processing tank having no upper porous member 38,
For example, a carrier stirring member 60 can be attached as shown in FIG. Here, FIG. 5 is a perspective view showing a mounting structure of another embodiment of the carrier stirring member 60. In this figure, the same elements as those in FIG. 4 are denoted by the same reference numerals. As shown in FIG. 5, an arm member 82 and an angle member 37 are fixed to the inner wall of the tank body 31, and the carrier stirring member 60 is connected to the arm member 82 and the angle member 3.
7 are inserted into the insertion holes 82a and 37a. The arm member 82 has a holding claw body 82a corresponding to the outer surface shape of the handle part 61 similarly to the arm member 80, and the carrier stirring member 60 is formed by fitting the handle part 61 into the holding claw body 82a. The arm member 82 is supported so as to be rotatable and vertically movable. With such a configuration, the carrier stirring member 60 can be easily attached even in a processing tank having no upper porous member 38.

【００２５】次に、排水処理槽１における排水処理方法
について図１、図６、図７等を参照しながら説明する。
ここで、図６は担体流動生物濾過槽３０の通常運転の状
態を示す模式図であり、図７は担体流動生物濾過槽３０
の逆洗運転の状態を示す模式図である。図１に示すよう
に排水処理槽１で排水を処理する場合は、流入管２から
第１嫌気濾床槽１０へ排水を受入れ、各槽において順次
処理していく。すなわち、排水中の有機汚濁物質は、嫌
気濾床槽１０，２０の嫌気性微生物によって嫌気性分解
され、次いで、担体流動生物濾過槽３０の好気性微生物
によって好気性分解される。なお、担体流動生物濾過槽
３０では通常運転と逆洗運転とが行われる。Next, a wastewater treatment method in the wastewater treatment tank 1 will be described with reference to FIGS.
Here, FIG. 6 is a schematic diagram showing a normal operation state of the carrier flowing biological filtration tank 30, and FIG.
It is a schematic diagram which shows the state of the backwash operation. When treating wastewater in the wastewater treatment tank 1 as shown in FIG. 1, wastewater is received from the inflow pipe 2 into the first anaerobic filter bed tank 10 and is sequentially processed in each tank. That is, the organic pollutants in the wastewater are anaerobically decomposed by the anaerobic microorganisms in the anaerobic filter tanks 10 and 20 and then aerobicly decomposed by the aerobic microorganisms in the carrier fluidized biological filtration tank 30. In the carrier fluidized biological filtration tank 30, a normal operation and a backwash operation are performed.

【００２６】図６に示すように、担体流動生物濾過槽３
０の通常運転では、第１散気装置３５からエアーを供給
することで好気性処理領域３３の被処理水および粒状担
体Ｃ３を流動化させる。これにより、被処理水中の有機
汚濁物質は、酸素が存在する好気性条件下において好気
性微生物によって分解（酸化）される。また、この分解
の際に発生する汚泥等の被濾過物は、濾過領域３４の粒
状担体Ｃ３によって濾過される。As shown in FIG.
In the normal operation of 0, the air to be treated and the granular carrier C3 in the aerobic treatment region 33 are fluidized by supplying air from the first air diffuser 35. As a result, the organic pollutants in the water to be treated are decomposed (oxidized) by the aerobic microorganisms under the aerobic condition in which oxygen is present. In addition, an object to be filtered such as sludge generated at the time of this decomposition is filtered by the granular carrier C3 in the filtration region 34.

【００２７】また、図７に示すように、担体流動生物濾
過槽３０の逆洗運転では、第１散気装置３５にかえて今
度は第２散気装置３６からエアーを供給することで、槽
内全体の被処理水および粒状担体Ｃ３を流動化させる。
そして、通常運転時に粒状担体Ｃ３によって濾過されま
た粒状担体Ｃ３から剥離した汚泥等の被濾過物は槽本体
３１から抜き出され、槽内が洗浄されることとなる。そ
して、処理水槽４０の処理水は消毒槽５０において消毒
され、放流管３を介して系外へ放流される。As shown in FIG. 7, in the backwashing operation of the carrier fluidized biological filtration tank 30, air is supplied from the second air diffuser 36 instead of the first air diffuser 35. The entire inner water to be treated and the granular carrier C3 are fluidized.
Then, during the normal operation, the object to be filtered such as the sludge which has been filtered by the granular carrier C3 and separated from the granular carrier C3 is extracted from the tank body 31, and the inside of the tank is washed. Then, the treated water in the treated water tank 40 is disinfected in the disinfecting tank 50 and discharged out of the system via the discharge pipe 3.

【００２８】運転負荷が高い場合や逆洗運転が正常に行
われない場合には、担体流動生物濾過槽３０の通常運転
時に、被処理水中のＳＳ等によって濾過領域３４の粒状
担体Ｃ３が固着し塊状体を形成する。この際、担体攪拌
部材６０は塊状体中に埋設された状態となる。そして、
これにより粒状担体Ｃ３の流動が規制されるうえに被処
理水の通過が阻止される。このような場合に、通常運転
を一旦停止し担体攪拌部材６０を用いて塊状体の攪拌処
理を行う。まず、アーム部材８０による取っ手部６１の
保持を解除し、担体攪拌部材６０を回動可能あるいは上
下動可能に設定する。そして、取っ手部６１を手動操作
で回動あるいは上下動させることによって、攪拌部６３
が塊状体を押し崩しこれにより塊状体が攪拌され被処理
水中で分散することとなる。またこの際、必要に応じて
取っ手部６１側にエアー供給源や水供給源を接続し、攪
拌部６３から高圧エアーや高圧水を供給することで、塊
状体を更に迅速に分散させることができる。なお、担体
攪拌部材６０を操作するタイミングは、これに限定され
ず、通常運転時、逆洗運転時等必要に応じて設定可能で
ある。When the operation load is high or the backwashing operation is not performed normally, the particulate carrier C3 in the filtration area 34 is fixed by the SS in the treated water during the normal operation of the carrier fluidized biological filtration tank 30. Form lumps. At this time, the carrier stirring member 60 is in a state of being buried in the lump. And
Thereby, the flow of the granular carrier C3 is restricted and the passage of the water to be treated is prevented. In such a case, the normal operation is temporarily stopped, and the agitation of the mass is performed using the carrier stirring member 60. First, the holding of the handle portion 61 by the arm member 80 is released, and the carrier stirring member 60 is set to be rotatable or vertically movable. Then, by rotating or vertically moving the handle 61 by manual operation, the stirrer 63 is moved.
Crushes the lump, whereby the lump is stirred and dispersed in the water to be treated. At this time, if necessary, an air supply source or a water supply source is connected to the handle portion 61 side, and high-pressure air or high-pressure water is supplied from the stirring portion 63, so that the lump can be more quickly dispersed. . The timing at which the carrier stirring member 60 is operated is not limited to this, and can be set as required during normal operation, backwashing operation, and the like.

【００２９】以上のように構成した本実施の形態の排水
処理槽１を用いた排水処理技術によれば、金属製の中空
パイプによって形成された担体攪拌部材６０を用い、攪
拌部６３を回動および上下動させて粒状担体Ｃ３の塊状
体押し崩すため、粒状担体Ｃ３の塊状体を低コストで確
実に攪拌し分散させることができる。また、担体攪拌部
材６０の軸部６２が、上部多孔部材３８およびアングル
部材３７の挿通孔３８ａ，３７ａによって支持されるよ
うに構成したため、担体攪拌部材６０の動作を円滑に行
うことができる。しかも、担体攪拌部材６０は取っ手部
６１を手動操作するように構成したため構造が簡単にな
る。また、担体攪拌部材６０の中空部を介して高圧エア
ーや高圧水を粒状担体Ｃ３の塊状体に吹き付けることが
できるように構成したため、より迅速に粒状担体Ｃ３の
塊状体を攪拌し分散させることができる。According to the wastewater treatment technique using the wastewater treatment tank 1 of the present embodiment configured as described above, the stirring section 63 is rotated by using the carrier stirring member 60 formed by a hollow metal pipe. In addition, since the mass of the granular carrier C3 is pushed down by moving up and down, the mass of the granular carrier C3 can be reliably stirred and dispersed at low cost. Further, since the shaft portion 62 of the carrier stirring member 60 is configured to be supported by the insertion holes 38a and 37a of the upper porous member 38 and the angle member 37, the operation of the carrier stirring member 60 can be performed smoothly. Moreover, the structure of the carrier stirring member 60 is simplified because the handle portion 61 is manually operated. Further, since the high pressure air or the high pressure water can be blown to the mass of the granular carrier C3 through the hollow portion of the carrier stirring member 60, the mass of the granular carrier C3 can be stirred and dispersed more quickly. it can.

【００３０】〔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] The present invention is not limited to the above-described embodiment, and various applications and modifications are conceivable. For example, each of the following embodiments to which the above embodiment is applied may be implemented.

【００３１】（Ａ）上記実施の形態では、塊状体を形成
した粒状担体Ｃ３を担体攪拌部材６０によって分散させ
る場合について記載したが、分散させる対象物は、排水
処理に用いられる担体等に限定されない。例えば、排水
中のＳＳや種々のスケールまたこれらが複合したもの
等、排水中に堆積するものが存在する種々の処理槽、例
えば夾雑物除去槽に本発明を適用することができる。(A) In the above-described embodiment, the case where the granular carrier C3 formed as a lump is dispersed by the carrier agitating member 60 has been described, but the object to be dispersed is not limited to the carrier used for wastewater treatment. . For example, the present invention can be applied to various treatment tanks in which there is deposited matter in wastewater, such as SS in wastewater, various scales, and composites thereof, for example, a foreign matter removal tank.

【００３２】（Ｂ）また、上記実施の形態では、担体攪
拌部材６０を回動あるいは上下動させる操作を手動操作
で行う場合について記載したが、攪拌部材６０の操作を
機械式に構成することもできる。(B) In the above embodiment, the case where the operation of rotating or vertically moving the carrier stirring member 60 is performed manually is described. However, the operation of the stirring member 60 may be mechanically configured. it can.

【００３３】（Ｃ）また、上記実施の形態では、担体流
動生物濾過槽３０において好気性処理領域３３および濾
過領域３４が槽内の上下に形成される場合について記載
したが、好気性処理領域３３および濾過領域３４が例え
ば槽内の左右に形成される場合であってよい。(C) In the above embodiment, the case where the aerobic treatment area 33 and the filtration area 34 are formed above and below the tank in the carrier fluidized biological filtration tank 30 has been described. And the case where the filtration area | region 34 is formed in the left and right in a tank, for example may be sufficient.

【００３４】[0034]

【発明の効果】以上説明したように、本発明によれば、
排水中に堆積する堆積物の塊状体を低コストで確実に攪
拌し分散させることができる合理的な排水処理技術を実
現することができる。As described above, according to the present invention,
It is possible to realize a rational wastewater treatment technology that can surely stir and disperse a lump of sediment deposited in wastewater at low cost.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明における一実施の形態の排水処理槽の概
略を示す概略図である。FIG. 1 is a schematic view showing an outline of a wastewater treatment tank according to an embodiment of the present invention.

【図２】担体流動生物濾過槽３０の模式図である。FIG. 2 is a schematic view of a carrier-flowing biological filtration tank 30.

【図３】担体攪拌部材６０の構成を示す斜視図である。FIG. 3 is a perspective view showing a configuration of a carrier stirring member 60.

【図４】担体攪拌部材６０の取付構造を示す斜視図であ
る。FIG. 4 is a perspective view showing a mounting structure of a carrier stirring member 60.

【図５】担体攪拌部材６０の別の実施の形態の取付構造
を示す斜視図である。FIG. 5 is a perspective view showing a mounting structure of another embodiment of the carrier stirring member 60.

【図６】担体流動生物濾過槽３０の通常運転の状態を示
す模式図である。FIG. 6 is a schematic diagram showing a state of normal operation of the carrier flowing biological filtration tank 30.

【図７】担体流動生物濾過槽３０の逆洗運転の状態を示
す模式図である。FIG. 7 is a schematic diagram showing a state of a backwash operation of the carrier fluidized biological filtration tank 30.

【符号の説明】[Explanation of symbols]

１…排水処理槽（排水処理装置） １０…第１嫌気濾床槽 ２０…第２嫌気濾床槽 ３０…担体流動生物濾過槽 ３３…好気性処理領域 ３４…濾過領域 ３５…第１散気装置 ３６…第２散気装置 ３７…アングル部材 ３８…上部多孔部材 ３７ａ，３８ａ…挿通孔 ４０…処理水槽 ５０…消毒槽 ６０…担体攪拌部材（可動部材） ６１…取っ手部 ６２…軸部 ６３…攪拌部 ８０，８２…アーム部材 ８０ａ，８２ｂ…保持爪体 Ｃ３…粒状担体 DESCRIPTION OF SYMBOLS 1 ... Wastewater treatment tank (Wastewater treatment apparatus) 10 ... 1st anaerobic filter bed tank 20 ... 2nd anaerobic filter bed tank 30 ... Carrier flow biological filtration tank 33 ... Aerobic treatment area 34 ... Filtration area 35 ... 1st air diffuser 36 second diffusing device 37 angle member 38 upper porous member 37a, 38a insertion hole 40 treatment water tank 50 disinfection tank 60 carrier stirring member (movable member) 61 handle portion 62 shaft portion 63 stirring Part 80, 82: Arm member 80a, 82b: Holding claw body C3: Granular carrier

フロントページの続き (72)発明者 杉林 伸夫 愛知県名古屋市千種区今池四丁目１番４号 フジクリーン工業株式会社内 Ｆターム(参考） 4D003 AA12 AB02 BA02 BA03 CA08 CA10 DA23 EA14 4G036 AC04 AC05 AC61 4G037 DA23 EA10 Continued on the front page (72) Inventor Nobuo Sugibayashi 1-4-4 Imaike, Chigusa-ku, Nagoya-shi, Aichi F-term (reference) in Fuji Clean Industry Co., Ltd. 4D003 AA12 AB02 BA02 BA03 CA08 CA10 DA23 EA14 4G036 AC04 AC05 AC61 4G037 DA23 EA10

Claims (8)

【特許請求の範囲】[Claims] 【請求項１】 排水の処理を行う排水処理装置であっ
て、 処理槽内に支持部材を介して取付けられ排水中に堆積し
た堆積物に対して移動可能に設けられた可動部材を有
し、塊状体を形成した堆積物を前記可動部材によって攪
拌し分散させるように構成されていることを特徴とする
排水処理装置。1. A wastewater treatment apparatus for treating wastewater, comprising: a movable member mounted in a treatment tank via a support member and movably provided for deposits deposited in the wastewater. A wastewater treatment apparatus configured to agitate and disperse a sediment formed as a lump by the movable member. 【請求項２】 請求項１に記載した排水処理装置であっ
て、 前記可動部材は、前記支持部材に形成された挿通孔によ
って支持され、該挿通孔に対して回動自在かつ挿通自在
に構成されていることを特徴とする排水処理装置。2. The wastewater treatment apparatus according to claim 1, wherein the movable member is supported by an insertion hole formed in the support member, and is configured to be rotatable and insertable with respect to the insertion hole. A wastewater treatment device characterized by being performed. 【請求項３】 請求項１または２に記載した排水処理装
置であって、 前記可動部材には、前記堆積物の塊状体へ高圧流体を供
給する流体供給手段が設けられていることを特徴とする
排水処理装置。3. The wastewater treatment device according to claim 1, wherein the movable member is provided with a fluid supply unit that supplies a high-pressure fluid to the lump of the sediment. Wastewater treatment equipment. 【請求項４】 請求項１〜３のいずれかにに記載した排
水処理装置であって、 前記可動部材は粒状担体が充填された処理槽に設けら
れ、塊状体を形成した粒状担体を前記可動部材によって
攪拌し該塊状体を分散させるように構成されていること
を特徴とする排水処理装置。4. The wastewater treatment apparatus according to claim 1, wherein the movable member is provided in a treatment tank filled with a granular carrier, and the movable member moves the granular carrier having a lump formed therein. A wastewater treatment apparatus characterized by being configured to stir by a member to disperse the lump. 【請求項５】 排水の処理を行う排水処理方法であっ
て、 排水中に堆積した堆積物に対して移動可能な可動部材
を、処理槽内に支持部材を介して取付け、塊状体を形成
した堆積物を前記可動部材によって攪拌し分散させるこ
とを特徴とする排水処理方法。5. A wastewater treatment method for treating wastewater, wherein a movable member movable with respect to sediment deposited in the wastewater is attached to a treatment tank via a support member to form a lump. A wastewater treatment method, wherein the sediment is stirred and dispersed by the movable member. 【請求項６】 請求項５に記載した排水処理方法であっ
て、 前記可動部材を前記支持部材に形成された挿通孔によっ
て支持し、前記可動部材を前記挿通孔に対して回動動作
および挿通動作させ、前記塊状体を攪拌し分散させるこ
とを特徴とする排水処理方法。6. The wastewater treatment method according to claim 5, wherein the movable member is supported by an insertion hole formed in the support member, and the movable member is rotated and inserted with respect to the insertion hole. A wastewater treatment method, wherein the method is operated to agitate and disperse the mass. 【請求項７】 請求項５または６に記載した排水処理方
法であって、 前記可動部材に前記堆積物の塊状体へ高圧流体を供給す
る流体供給手段を設け、前記可動部材の動作に合わせて
前記塊状体へ高圧流体を供給し、前記塊状体を攪拌し分
散させることを特徴とする排水処理方法。7. The wastewater treatment method according to claim 5, wherein the movable member is provided with fluid supply means for supplying a high-pressure fluid to the lump of the sediment, and the movable member is provided in accordance with the operation of the movable member. A wastewater treatment method, comprising supplying a high-pressure fluid to the mass and agitating and dispersing the mass. 【請求項８】 請求項５〜７のいずれかに記載した排水
処理方法であって、 前記可動部材を粒状担体が充填された処理槽に設け、塊
状体を形成した粒状担体を前記可動部材によって攪拌し
分散させることを特徴とする排水処理方法。8. The wastewater treatment method according to claim 5, wherein the movable member is provided in a treatment tank filled with a granular carrier, and the granular carrier having a lump is formed by the movable member. A wastewater treatment method characterized by stirring and dispersing.
JP2000331286A 2000-10-30 2000-10-30 Wastewater treatment apparatus and method Pending JP2002126773A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000331286A JP2002126773A (en) 2000-10-30 2000-10-30 Wastewater treatment apparatus and method

Publications (1)

Publication Number Publication Date
JP2002126773A true JP2002126773A (en) 2002-05-08

Family

ID=18807651

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000331286A Pending JP2002126773A (en) 2000-10-30 2000-10-30 Wastewater treatment apparatus and method

Country Status (1)

Country Link
JP (1) JP2002126773A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012187557A (en) * 2011-03-14 2012-10-04 Inc Engineering Co Ltd Wastewater treatment apparatus and wastewater treatment method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012187557A (en) * 2011-03-14 2012-10-04 Inc Engineering Co Ltd Wastewater treatment apparatus and wastewater treatment method

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