JPH04310291A - Submerged aeration apparatus - Google Patents

Submerged aeration apparatus

Info

Publication number
JPH04310291A
JPH04310291A JP3071292A JP7129291A JPH04310291A JP H04310291 A JPH04310291 A JP H04310291A JP 3071292 A JP3071292 A JP 3071292A JP 7129291 A JP7129291 A JP 7129291A JP H04310291 A JPH04310291 A JP H04310291A
Authority
JP
Japan
Prior art keywords
liquid
treated
separation membrane
pipe
tank
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.)
Granted
Application number
JP3071292A
Other languages
Japanese (ja)
Other versions
JP2704970B2 (en
Inventor
Masatsugu Yamagata
山縣 昌継
Yoshihisa Narukami
善久 鳴上
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.)
Kubota Corp
Original Assignee
Kubota Corp
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 Kubota Corp filed Critical Kubota Corp
Priority to JP3071292A priority Critical patent/JP2704970B2/en
Publication of JPH04310291A publication Critical patent/JPH04310291A/en
Application granted granted Critical
Publication of JP2704970B2 publication Critical patent/JP2704970B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

Abstract

PURPOSE:To reduce power for circulating a liquid to be treated and to discharge a clean treated liquid from a treatment tank in a submerged aeration apparatus. CONSTITUTION:A head tank 11 is provided to the upper part of an outer cylindrical pipe 1, and an external pressure type separation membrane 12 for filtering a liquid 4 to be treated and the air diffusing pipe 15 positioned under the separation membrane 12 are immersed in the liquid 4 to be treated which as been received in the head tank 11. When air is injected from the air diffusing pipe 15, the level of the liquid 4 to be treated above the separation membrane 12 rises. Therefore, the liquid 4 to be treated overflows the upper end opening edge of an inner cylindrical pipe 2 to flow in the inner cylindrical pipe 2.

Description

【発明の詳細な説明】[Detailed description of the invention]

【0001】0001

【産業上の利用分野】本発明は深層曝気装置の運転方法
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of operating a deep aeration system.

【0002】0002

【従来の技術】活性汚泥処理装置の一つとして、従来か
ら深層曝気装置が利用されている。図2はこのような従
来の深層曝気装置を示す。ここで1は上下方向の有底の
外筒管で、その内部には、上下両端が開口された内筒管
2が同心状に配置されて、深井戸構造の処理槽3を構成
している。処理槽3の内部には活性汚泥混合液からなる
被処理液4が満たされており、内筒部2の内部は被処理
液4のための下降流部5を、また内筒管2と外筒管1と
の間は上昇流部6を、それぞれ形成している。7は循環
ポンプで、外筒管1の中の上部に存在する被処理液を、
循環液として円筒管2の上端開口からこの内筒管2の中
へ供給可能である。8はブロワで、内筒管2の水面近く
における被処理液4の中に空気を吹き込み可能である。 また9は原水で、内筒管2の上端開口からこの内筒管2
の中に供給される。
2. Description of the Related Art A deep aeration system has been used as one type of activated sludge treatment system. FIG. 2 shows such a conventional deep aeration device. Here, 1 is an outer cylindrical tube with a bottom in the vertical direction, and inside the outer cylindrical tube 2, an inner cylindrical tube 2 with both upper and lower ends open is arranged concentrically, forming a processing tank 3 having a deep well structure. . The inside of the treatment tank 3 is filled with a liquid to be treated 4 made of an activated sludge mixed liquid, and the inside of the inner cylinder part 2 has a downward flow part 5 for the liquid to be treated 4, and also connects the inner cylinder pipe 2 and the outside. An ascending flow section 6 is formed between the cylindrical pipe 1 and the cylindrical pipe 1. 7 is a circulation pump that circulates the liquid to be treated present in the upper part of the outer cylindrical pipe 1;
The circulating fluid can be supplied into the inner cylindrical tube 2 from the upper end opening of the cylindrical tube 2. A blower 8 is capable of blowing air into the liquid to be treated 4 near the water surface of the inner tube 2. In addition, 9 is raw water, which flows from the upper end opening of the inner cylinder pipe 2 to the inner cylinder pipe 2.
is supplied within.

【0003】このような構成によれば、循環ポンプ7を
運転して循環液を内筒管2の中に供給すると、この内筒
管2の中の被処理液4は、ブロワ8から吹き込まれた空
気とともに下降流部5の中を下降する。この下降により
水深にもとづく圧力が加わるため、空気中の酸素は被処
理液4の中に溶解し、高濃度の活性汚泥微生物により消
費される。次に被処理液4が上昇流部6に移ると、上昇
するにつれ水圧の減少により気泡が再遊離する。
According to such a configuration, when the circulation pump 7 is operated to supply circulating liquid into the inner cylinder pipe 2, the liquid to be treated in the inner cylinder pipe 2 is blown from the blower 8. The air flows down through the downflow section 5 together with the air. Since pressure based on the water depth is applied due to this descent, oxygen in the air is dissolved in the liquid to be treated 4 and consumed by the highly concentrated activated sludge microorganisms. Next, when the liquid to be treated 4 moves to the upward flow section 6, the air bubbles are released again due to the decrease in water pressure as it rises.

【0004】このようにして処理槽3の中を下降および
上昇する間に微生物処理され、上昇流部6の最上部に到
達した被処理液4は、循環ポンプ7により循環液として
下降流部5へ供給されるものを除き、処理液10として
次工程へ送られる。
In this way, the liquid 4 to be treated is treated with microorganisms while descending and rising in the treatment tank 3 and reaches the top of the upward flow section 6. The remaining liquid is sent to the next step as the processing liquid 10.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、このよ
うな従来のものでは、被処理液4の循環のためにポンプ
7を運転する必要があることから、そのために大きな動
力を要するという問題点がある。また、深層曝気装置で
処理されただけの処理液10は、まだ汚泥濃度が高く、
次工程以降で固液分離や凝集沈殿などの処理をさらに行
わなければならないという問題点もある。
[Problems to be Solved by the Invention] However, in such a conventional system, it is necessary to operate the pump 7 in order to circulate the liquid 4 to be treated, so there is a problem in that a large amount of power is required for this purpose. . In addition, the treated liquid 10 that has only been treated with the deep aeration device still has a high sludge concentration.
There is also the problem that further treatments such as solid-liquid separation and coagulation and precipitation must be performed in subsequent steps.

【0006】そこで本発明はこのような問題点を解決し
、被処理液の循環のための動力を低減できるようにし、
しかも処理槽から清浄な処理液を排出することができる
ようにすることを目的とする
The present invention solves these problems by reducing the power required for circulating the liquid to be treated.
Moreover, the purpose is to enable clean processing liquid to be discharged from the processing tank.

【0007】[0007]

【課題を解決するための手段】上記目的を達成するため
本発明は、外筒管の上部にヘッドタンクを設け、このヘ
ッドタンク内の被処理液中に、このタンク内の被処理液
を濾過するセラミック製外圧型分離膜と、この分離膜の
下方に位置する散気管とを浸漬させて、散気管より噴出
される空気により分離膜の上方における被処理液の液面
を上昇させ、この液面の上昇した被処理液を、内筒管の
上端開口縁を越流させてこの内筒管の中へ流下させるも
のである。
[Means for Solving the Problems] In order to achieve the above object, the present invention provides a head tank in the upper part of the outer tube, and filters the liquid to be treated in the tank into the liquid to be treated in the head tank. A ceramic external pressure separation membrane and an aeration tube located below the separation membrane are immersed, and the air ejected from the aeration tube raises the level of the liquid to be treated above the separation membrane. The liquid to be treated whose surface has risen is allowed to flow over the upper opening edge of the inner tube and flow down into the inner tube.

【0008】[0008]

【作用】このようなものであると、深層曝気処理された
後被処理液が分離膜のマイクロフィルタリング作用によ
って濾過され、濾過液のみが槽外へ排出される。分離膜
を運転する際には、散気管から噴出される空気にもとづ
くエアリフト効果により、槽内の被処理液を分離膜に向
けて流動させることが必要不可欠であるが、この散気管
からの空気により液面が上昇される被処理液を内筒管の
内へ越流させることによって、槽内の被処理液の循環が
行われる。したがって循環のために特にポンプを設ける
必要がなくなり、そのための動力が低減される。
[Function] With such a system, the liquid to be treated after deep aeration treatment is filtered by the microfiltering action of the separation membrane, and only the filtrate is discharged to the outside of the tank. When operating a separation membrane, it is essential that the liquid to be treated in the tank flow toward the separation membrane using the air lift effect based on the air ejected from the aeration tube. By overflowing the liquid to be treated whose liquid level is raised into the inner cylinder pipe, the liquid to be treated in the tank is circulated. Therefore, there is no need to provide a special pump for circulation, and the power required for this purpose is reduced.

【0009】[0009]

【実施例】図1において、内筒管2と外筒管1との間に
形成される上昇流部6の上部には、外筒管1の一部分を
膨出させた形のヘッドタンク11が形成されている。そ
して、このヘッドタンク11の中には、多数のチューブ
状の濾過膜をユニット化した構成のセラミック製外圧型
分離膜12が、被処理液4の中に没するようにして設け
られている。分離膜12には槽外への管路13が接続さ
れ、この管路13には吸引用のポンプ14が設けられて
いる。分離膜12よりも下方におけるヘッドタンク11
の内部には散気管15が設けられ、槽外からこの散気管
15に接続される管路16には、散気管15へ空気を圧
送するためのブロワ17が設けられている。
[Embodiment] In FIG. 1, a head tank 11 in the form of a part of the outer tube 1 bulged is provided at the upper part of the upward flow section 6 formed between the inner tube 2 and the outer tube 1. It is formed. In the head tank 11, a ceramic external pressure type separation membrane 12, which is constructed by unitizing a large number of tubular filtration membranes, is provided so as to be submerged in the liquid to be treated 4. A conduit 13 to the outside of the tank is connected to the separation membrane 12, and this conduit 13 is provided with a pump 14 for suction. Head tank 11 below the separation membrane 12
A diffuser pipe 15 is provided inside the tank, and a blower 17 for pressure-feeding air to the diffuser pipe 15 is provided in a conduit 16 connected to the diffuser pipe 15 from outside the tank.

【0010】内筒管2の上端開口縁18は、所定レベル
になるように制御される被処理液4の液面よりもやや上
方に位置するように構成されている。このような構成に
よれば、上昇流室6の中を上昇してきた被処理液4はヘ
ッドタンク11の中に入り込むのであるが、ポンプ14
を運転して外圧型分離膜12の内部に負圧を作用させる
と、被処理液4の濾過が行われ、マイクロフィルタリン
グ効果によって清浄化された濾過液のみが、管路13を
経て槽外に排出され、その後に次工程へ送られる。分離
膜12の稼働に際しブロワ12を運転すると、散気管1
5から被処理液4の中へ上向きに空気が噴出され、この
空気にもとづくエアリフト効果により被処理液4が分離
膜12に向け上昇されて、ヘッドタンク11の中を循環
する。
The upper opening edge 18 of the inner tube 2 is configured to be located slightly above the level of the liquid to be treated 4, which is controlled to be at a predetermined level. According to such a configuration, the liquid to be treated 4 that has risen in the upward flow chamber 6 enters the head tank 11, but the pump 14
When a negative pressure is applied to the inside of the external pressure type separation membrane 12, the liquid to be treated 4 is filtered, and only the filtrate purified by the microfiltering effect is passed through the pipe 13 to the outside of the tank. It is discharged and then sent to the next process. When the blower 12 is operated when the separation membrane 12 is operated, the air diffuser 1
Air is ejected upward from 5 into the liquid to be treated 4, and due to the air lift effect based on this air, the liquid to be treated 4 is lifted toward the separation membrane 12 and circulated in the head tank 11.

【0011】散気管15から空気を噴出させると、この
空気の体積分だけ、図1の仮想線で示すように被処理液
4の液面が上昇し、この液面が内筒管2の上端開口縁1
8よりも高くなる。したがって、分離膜12にて濾過さ
れなかった被処理液4は、上端開口縁18を越流して内
筒管2の中に入り込み、次々と流れ込んでくる被処理液
4により流動されて、槽内を循環される。
When air is blown out from the aeration pipe 15, the liquid level of the liquid to be treated 4 rises by the volume of this air as shown by the imaginary line in FIG. Opening edge 1
It will be higher than 8. Therefore, the liquid to be treated 4 that has not been filtered by the separation membrane 12 flows over the upper opening edge 18 and enters the inner tube 2, and is fluidized by the liquid to be treated 4 that flows in one after another into the tank. is circulated.

【0012】このように、被処理液4を循環させるため
に特にポンプを用いることなく、散気管15から空気を
噴出させることにより必然的に生じる液位の上昇を利用
して循環を行うようにしたため、循環のための所要動力
を低減させることが可能になる。また、散気管15から
被処理液4の中へ空気が供給されるため、被処理液4へ
の酸素の溶解が良好に行われる。
[0012] In this way, the liquid to be treated 4 can be circulated by utilizing the rise in liquid level that inevitably occurs when air is blown out from the aeration pipe 15, without using a particular pump. Therefore, it becomes possible to reduce the power required for circulation. In addition, since air is supplied from the aeration pipe 15 into the liquid to be treated 4, oxygen is well dissolved into the liquid to be treated 4.

【0013】[0013]

【発明の効果】以上述べたように本発明によると、槽内
に被処理液を循環させるに必要な動力を著しく低減する
ことができるのみならず、外圧型分離膜により濾過され
た清浄な濾過液のみを槽外に排出することができる。
[Effects of the Invention] As described above, according to the present invention, not only can the power required to circulate the liquid to be treated in the tank be significantly reduced, but also the clean filtration caused by the external pressure type separation membrane can be achieved. Only the liquid can be discharged outside the tank.

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

【図1】本発明の一実施例の深層曝気装置の概略構成図
である。
FIG. 1 is a schematic configuration diagram of a deep aeration device according to an embodiment of the present invention.

【図2】従来の深層曝気装置の概略構成図である。FIG. 2 is a schematic configuration diagram of a conventional deep aeration device.

【符号の説明】[Explanation of symbols]

1    外筒管 2    内筒管 4    被処理液 11    ヘッドタンク 12    分離膜 15    散気管 18    上端開口縁 1 Outer tube 2 Inner tube 4. Liquid to be treated 11 Head tank 12 Separation membrane 15    Air diffuser pipe 18 Top opening edge

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】  有底外筒管と、上下両端が開口されて
外筒管の中に配置される内筒管とを有した深井戸構造の
深層曝気装置であって、外筒管の上部にヘッドタンクを
設け、このヘッドタンク内の被処理液中に、このタンク
内の被処理液を濾過するセラミック製外圧型分離膜と、
この分離膜の下方に位置する散気管とを浸漬させて、散
気管より噴出される空気により分離膜の上方における被
処理液の液面を上昇させ、この液面の上昇した被処理液
を、内筒管の上端開口縁を越流させてこの内筒管の中へ
流下させることを特徴とする深層曝気装置。
1. A deep aeration device having a deep well structure, comprising a bottomed outer tube and an inner tube opened at both upper and lower ends and disposed inside the outer tube, the upper part of the outer tube being A head tank is provided in the head tank, and a ceramic external pressure type separation membrane is provided in the liquid to be treated in the head tank to filter the liquid to be treated in the tank;
The aeration pipe located below this separation membrane is immersed, and the liquid level of the liquid to be treated above the separation membrane is raised by the air ejected from the aeration pipe, and the liquid to be treated whose liquid level has risen is A deep aeration device characterized in that the flow overflows the upper opening edge of an inner cylindrical pipe and flows down into the inner cylindrical pipe.
JP3071292A 1991-04-04 1991-04-04 Deep aeration equipment Expired - Lifetime JP2704970B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3071292A JP2704970B2 (en) 1991-04-04 1991-04-04 Deep aeration equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3071292A JP2704970B2 (en) 1991-04-04 1991-04-04 Deep aeration equipment

Publications (2)

Publication Number Publication Date
JPH04310291A true JPH04310291A (en) 1992-11-02
JP2704970B2 JP2704970B2 (en) 1998-01-26

Family

ID=13456468

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3071292A Expired - Lifetime JP2704970B2 (en) 1991-04-04 1991-04-04 Deep aeration equipment

Country Status (1)

Country Link
JP (1) JP2704970B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19702461C2 (en) * 1996-10-07 1999-11-18 Taiseikozai Co All-round flexible cutting line for a mower or lawn trimmer and mower or lawn trimmer with all-round flexible cutting line
JP2008168220A (en) * 2007-01-12 2008-07-24 Mitsubishi Rayon Eng Co Ltd Membrane separation treatment device
CN102838205A (en) * 2012-08-31 2012-12-26 乐金电子研发中心(上海)有限公司 External continuous flow aerobic granular sludge membrane bioreactor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5532159U (en) * 1978-08-25 1980-03-01
JPS611199A (en) * 1984-06-14 1986-01-07 Matsushita Electric Ind Co Ltd Speaker
JPS62129432A (en) * 1985-11-29 1987-06-11 倉真木材株式会社 Building method and laminated member for wall

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5532159U (en) * 1978-08-25 1980-03-01
JPS611199A (en) * 1984-06-14 1986-01-07 Matsushita Electric Ind Co Ltd Speaker
JPS62129432A (en) * 1985-11-29 1987-06-11 倉真木材株式会社 Building method and laminated member for wall

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19702461C2 (en) * 1996-10-07 1999-11-18 Taiseikozai Co All-round flexible cutting line for a mower or lawn trimmer and mower or lawn trimmer with all-round flexible cutting line
JP2008168220A (en) * 2007-01-12 2008-07-24 Mitsubishi Rayon Eng Co Ltd Membrane separation treatment device
CN102838205A (en) * 2012-08-31 2012-12-26 乐金电子研发中心(上海)有限公司 External continuous flow aerobic granular sludge membrane bioreactor

Also Published As

Publication number Publication date
JP2704970B2 (en) 1998-01-26

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