JPH03249995A - Sewage treating device - Google Patents
Sewage treating deviceInfo
- Publication number
- JPH03249995A JPH03249995A JP2048738A JP4873890A JPH03249995A JP H03249995 A JPH03249995 A JP H03249995A JP 2048738 A JP2048738 A JP 2048738A JP 4873890 A JP4873890 A JP 4873890A JP H03249995 A JPH03249995 A JP H03249995A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- membrane module
- microbial
- treatment tank
- mixed solution
- 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
Links
- 239000010865 sewage Substances 0.000 title claims abstract description 11
- 239000012528 membrane Substances 0.000 claims abstract description 39
- 244000005700 microbiome Species 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 238000005273 aeration Methods 0.000 claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000000813 microbial effect Effects 0.000 claims description 37
- 238000001914 filtration Methods 0.000 claims description 22
- 239000011259 mixed solution Substances 0.000 claims description 19
- 239000002351 wastewater Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 5
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000009792 diffusion process Methods 0.000 abstract 1
- 238000004891 communication Methods 0.000 description 5
- 239000010802 sludge Substances 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000000108 ultra-filtration Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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
- Separation Using Semi-Permeable Membranes (AREA)
- Activated Sludge Processes (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、有機系汚水を微生物処理するとともに、処理
された混合溶液を限外ろ過膜によりろ過処理するように
した汚水処理装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a sewage treatment device that processes organic wastewater with microorganisms and filters the treated mixed solution using an ultrafiltration membrane.
従来の技術
従来より、上記のような微生物処理装置においては、た
とえば第２図に示すように、微生物処理槽１の中に限外
ろ過膜からなる膜モジュール２を設けるとともに、この
膜モジュール２の下方に曝気用散気管３を設けている。BACKGROUND ART Conventionally, in the above-mentioned microbial treatment apparatus, for example, as shown in FIG. 2, a membrane module 2 made of an ultrafiltration membrane is provided in a microbial treatment tank 1. An aeration diffuser pipe 3 is provided below.
そして処理槽１の中に原水４が供給されると、この原水
４は槽１の内部で微生物処理され、微生物との混合溶液
５となる。この混合溶液５は、ブロワ６から散気管３を
経て吹き出される空気の気泡によって上昇流となり、吸
引ポンプ７−からの吸引力が作用される膜モジュール２
によりろ過処理される。混合溶液は、さらに上昇して槽
１の内部を循環し、この＠環流によって混合溶液５は撹
拌される。槽１の中の混合溶液の濃度（微生物濃度等）
がある値より上昇しないように余剰分だけ排出路８から
これを排出させる。When the raw water 4 is supplied into the treatment tank 1, the raw water 4 is treated with microorganisms inside the tank 1, and becomes a mixed solution 5 with microorganisms. This mixed solution 5 becomes an upward flow due to the air bubbles blown out from the blower 6 through the aeration pipe 3, and the membrane module 2 receives the suction force from the suction pump 7-.
Filtered by The mixed solution further rises and circulates inside the tank 1, and the mixed solution 5 is stirred by this reflux. Concentration of mixed solution in tank 1 (microbial concentration, etc.)
Only the surplus amount is discharged from the discharge path 8 so that the amount does not rise above a certain value.
発明が解決しようとする課題
ところで微生物処理対象液の量が増大するにつれ微生物
反応槽（活性汚泥処理槽）は幅、長さ、深さともに距離
が長くなるため、微生物反応槽内に浸漬する膜モジユー
ル下部の散気装置からの空気の曝気量は、微生物反応槽
内に生育する微生物に必要な空気量とか、膜モジュール
の膜表面のスケーリング付着を抑えるに必要な空気量よ
りも更に多量な空気を送り、微生物反応槽内の微生物等
の懸濁物質がその槽内すみずみまで浮遊、流動さすため
に多大な曝気動力が必要であるという問題点があった。Problems to be Solved by the Invention However, as the amount of liquid to be treated by microorganisms increases, the width, length, and depth of the microbial reaction tank (activated sludge treatment tank) become longer. The amount of air aerated from the air diffuser at the bottom of the module is greater than the amount of air required for microorganisms growing in the microbial reaction tank or the amount of air required to suppress scaling on the membrane surface of the membrane module. There is a problem in that a large amount of aeration power is required to cause suspended matter such as microorganisms in the microbial reaction tank to float and flow throughout the tank.
このことは微生物反応槽が大きくなればなる程いちじる
しくなる。−例をあげると、微生物反応槽内に浸漬する
膜モジュールのどれかがトラブルした場合に、膜モジュ
ールの点検もしくは洗浄等をしやすいように、たとえば
特願平１−１１３３２８号においては微生物処理部と、
膜モジュールを備えた濾過処理部とを各々独立としやす
い構造とするために分離し、両槽として設けて、かつそ
の両槽を、その上部および下部において、各々バルブ及
び堰を備えた管路及び樋などを用いて連通および遮断可
能にしたものが提案されている。This becomes more serious as the microbial reaction tank becomes larger. - For example, in Japanese Patent Application No. 1-113328, the microbial treatment section and,
The filtration processing section equipped with a membrane module is separated from the filtration processing section to make it easy to make each one independent, and is provided as both tanks, and both the tanks are equipped with a pipe line and a weir each equipped with a valve and a weir in the upper and lower parts of the tank. It has been proposed to use a gutter or the like to enable communication and isolation.
このような構造になると膜モジュールの点検、膜の洗浄
等、維持管理は容易であるが微生物反応槽内全体の液の
循環は膜モジユール下部からの通常の曝気力では不足す
るという問題があった。With this structure, maintenance such as inspecting the membrane module and cleaning the membrane is easy, but there is a problem in that the normal aeration force from the bottom of the membrane module is insufficient to circulate the liquid throughout the microbial reaction tank. .
そこで本発明はこのような問題点を解決するために、微
生物反応槽内に浸漬された膜モジユール下部の曝気によ
って９液中への酸素供給も膜表面のスケール防止も微生
物反応槽内の液の均一なる循環をもすべて満たそうとせ
ずに、微生物反応槽内の液の均一なる循環（又は微生物
等懸濁物質が澱まない流れの確保）はそのための専用の
撹拌装置を設けることにより微生物反応・膜分離に伴な
うトータルの動力（エネルギー）を低減させることを目
的とする。In order to solve these problems, the present invention aims to supply oxygen to the liquid and prevent scale on the membrane surface by aeration at the bottom of the membrane module immersed in the microbial reaction tank. Uniform circulation of the liquid in the microbial reaction tank (or ensuring a flow that does not stagnate suspended substances such as microorganisms) can be achieved by installing a special stirring device for the microbial reaction, without trying to fill all parts of the microbial reaction tank. - The purpose is to reduce the total power (energy) associated with membrane separation.
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、汚水を微生物処理
する微生物処理部と、微生物処理された混合溶液を膜モ
ジュールによりろ過処理するろ過処理部とを１つの槽内
に設け、前記膜モジュールの下方に設けられた曝気用の
散気管と前記微生物処理部に液撹拌用の手段を有する構
成としたものであり、更にまた、もしくは原水を微生物
処理する微生物処理槽と、微生物処理された混合溶液を
膜モジュールによりろ過処理するろ過処理槽と、前記ろ
過処理槽の内部における膜モジュールの下方に設けられ
た曝気用散気管と、前記ろ過処理槽と微生物処理槽とを
その上部および下部において連通および遮断可能に接続
する手段と、前記活性汚泥処理槽の内部を撹拌する手段
とを有する構成としたものである。Means for Solving the Problems In order to achieve the above object, the present invention provides a microbial treatment section that microbially treats wastewater and a filtration processing section that filters the microbially treated mixed solution using a membrane module in one tank. The membrane module is provided with a diffuser pipe for aeration provided below the membrane module, and a means for stirring the liquid in the microbial treatment section; , a filtration treatment tank for filtering a mixed solution treated with microorganisms through a membrane module; an aeration diffuser pipe provided below the membrane module inside the filtration treatment tank; and the filtration treatment tank and the microbial treatment tank. The activated sludge treatment tank is configured to include means for connecting the activated sludge treatment tank so as to be able to communicate and shut off at the upper and lower parts thereof, and means for stirring the inside of the activated sludge treatment tank.
作用
このような構成によれば、散気管から吹き出される空気
によって、ろ過処理槽（部）の中の液がこの空気ととも
に微生物処理槽（部）の中に送り込まれるが、この微生
物処理槽（部）の内部は、これを撹拌する手段によって
撹拌を受けるため、槽内の液が十分に撹拌、Ｉ！環され
、かつ十分に空気と混合されるため、良好な条件下での
微生物処理が可能になる。Function According to this configuration, the liquid in the filtration treatment tank (section) is sent into the microbial treatment tank (section) together with this air by the air blown out from the aeration pipe. Since the inside of the tank is agitated by means of stirring, the liquid in the tank is sufficiently agitated and I! Because it is surrounded and sufficiently mixed with air, microbial treatment is possible under favorable conditions.
実施例
第１図において、１１は微生物処理槽、１２はろ過処理
槽であって９両槽１１，１２は互いに分離して構成され
ている。ろ過処理槽１２の内部には、ろ過膜を有する膜
モジュール１３が複数段に設けられ、これら膜モジュー
ル１３には槽外において吸引ポンプ１４が接続されてい
る。膜モジュール１３の下方には曝気用散気管１５が設
けられ、この曝気用散気管１５には、槽外においてブロ
ワ１６が接続されている。Embodiment In FIG. 1, 11 is a microbial treatment tank, 12 is a filtration treatment tank, and the nine tanks 11 and 12 are configured to be separated from each other. Inside the filtration treatment tank 12, membrane modules 13 having filtration membranes are provided in multiple stages, and a suction pump 14 is connected to these membrane modules 13 outside the tank. An aeration diffuser pipe 15 is provided below the membrane module 13, and a blower 16 is connected to this aeration diffuser pipe 15 outside the tank.
ろ過処理槽１２と微生物処理槽１１との底部どうしは、
バルブ１７を備えた連通管１８によって互いに連通され
ている。また、これら両槽１１，１２の上部どうしは、
堰板１９を有した連通路２０によって互いに連通されて
いる。The bottoms of the filtration treatment tank 12 and the microbial treatment tank 11 are
They are communicated with each other by a communication pipe 18 provided with a valve 17. Moreover, the upper parts of these two tanks 11 and 12 are
They are communicated with each other by a communication path 20 having a dam plate 19.
微生物処理槽１１には撹拌装置２１が設けられ、この撹
拌装置１ｆ２１は、槽内の下部に位置する撹拌羽根２２
と、槽外に設けられた駆動装！！２３と、これら駆動装
置２３と撹拌羽根２２とを連動させる駆動軸２４とを有
している。The microorganism treatment tank 11 is provided with a stirring device 21, and this stirring device 1f21 is equipped with a stirring blade 22 located at the lower part of the tank.
And the drive equipment installed outside the tank! ! 23, and a drive shaft 24 that interlocks these drive devices 23 and stirring blades 22.
なお、第１図において、２５は原水の供給管、２６は槽
内の混合溶液、モして２７は混合溶液の排出管である。In FIG. 1, 25 is a raw water supply pipe, 26 is a mixed solution in the tank, and 27 is a mixed solution discharge pipe.
このような構成において、装置の運転に際しては、バル
ブ１７を開いた状態で槽１１の内部に原水を供給し、吸
引ポンプ１４とブロワ１６と撹拌装置１２１とを運転す
る。すると、この供給された原水は微生物処理槽１１の
内部で微生物（活性汚泥）処理され、混合溶液２６にな
る。この混合溶液２６は、連通管１８を経てろ過処理槽
１２の中に入り、ブロワ１６から散気管Ｉ５を経て槽内
に吹き出される曝気用空気の気泡により上昇流となり、
膜モジュール１３によりろ過されて、濃縮液とろ過液と
に分離される。ろ過液は、吸引ポンプ１４によって槽外
へ排出される。In such a configuration, when operating the apparatus, raw water is supplied into the tank 11 with the valve 17 open, and the suction pump 14, blower 16, and stirring device 121 are operated. Then, this supplied raw water is treated with microorganisms (activated sludge) inside the microorganism treatment tank 11 and becomes a mixed solution 26. This mixed solution 26 enters the filtration treatment tank 12 through the communication pipe 18, and becomes an upward flow due to the aeration air bubbles blown into the tank from the blower 16 through the aeration pipe I5.
It is filtered by the membrane module 13 and separated into a concentrated liquid and a filtrate. The filtrate is discharged out of the tank by the suction pump 14.
濃縮液は、散気管１５からの空気の吹き出しにともなう
液面の上昇によって堰板１９を越流し、連通路２０を経
て微生物処理槽１１へ流れ込む。The concentrated liquid overflows the weir plate 19 due to a rise in the liquid level as air is blown out from the aeration pipe 15, and flows into the microbial treatment tank 11 via the communication path 20.
微生物処理槽重１では、このようにして流れ込んだ濃縮
液と、供給管２５からの汚水（原水）と、槽内の微生物
等とが混合して混合溶液２６となるが、この混合溶液２
６は、撹拌羽根２２を備えた撹拌装置２１によって撹拌
されるとともに槽内を循環され。In the microbial treatment tank 1, the concentrated liquid that has flowed in this way, the sewage (raw water) from the supply pipe 25, and the microorganisms in the tank are mixed to form a mixed solution 26.
6 is stirred by a stirring device 21 equipped with stirring blades 22 and circulated within the tank.
これにより上記王者の混合状態が良好なものになる。ま
た、散気管Ｉ５から吹き呂された気泡中の酸素は濃縮液
中に溶解しつつ濃縮液とともに微生物処理槽１１に流れ
込むが、上記撹拌、循環を受けることで混合溶液２６の
中に十分に分散、混合されるため、良好な微生物の生育
条件の下で微生物処理が行われる。This results in a good mix of the champions. Further, the oxygen in the bubbles blown from the aeration pipe I5 is dissolved in the concentrated liquid and flows into the microbial treatment tank 11 together with the concentrated liquid, but it is sufficiently dispersed in the mixed solution 26 by being subjected to the above stirring and circulation. , are mixed, so microbial treatment is performed under favorable microbial growth conditions.
膜モジュール１３の洗浄の際には、バルブ１７を閉じる
とともに、散気管１５からの空気の吹き出しを停止して
ろ過処理槽１２の液面を堰板１９の上端よりも下げ、そ
の後、このろ過処理槽１２の中の液を槽外に排出して、
代わりに洗浄水や薬液を注入すればよい、ろ過処理槽１
２として、第１図の紙面と垂直な方向に複数の部屋に区
画されたものを利用すると、洗浄を行っている部屋以外
の部屋では通常のろ過処理を何ら支障なく行えるため、
装置全体として運転を休止することなく洗浄を行える０
本発明では対象液を汚水処理装置としているが、微生物
生産装置等微生物による工程への応用も出来る。また、
使用する膜は有機系、無機系であるとを問わない。When cleaning the membrane module 13, close the valve 17 and stop blowing air from the air diffuser 15 to lower the liquid level in the filtration tank 12 below the upper end of the weir plate 19. Drain the liquid in the tank 12 to the outside of the tank,
Filtration treatment tank 1 that can be filled with cleaning water or chemical solution instead
2, if you use a system that is divided into multiple rooms in the direction perpendicular to the plane of the paper in Figure 1, normal filtration processing can be performed without any problems in rooms other than the room where cleaning is being performed.
The entire device can be cleaned without stopping operation.
In the present invention, the target liquid is a sewage treatment device, but it can also be applied to a process using microorganisms such as a microorganism production device. Also,
The membrane used may be organic or inorganic.
第３図は本発明の他の実施例の汚水処理装置を示し、第
１図に示した部材と同一の部材には同一の参照番号を付
している。ここでは、第１図に示されるように微生物処
理槽１１とろ過処理槽１２とを分けるようなことは行わ
れておらず、第２図の場合と同様に、微生物処理槽１１
の中に膜モジュール１３と撹拌装置２１とがともに設け
られている。FIG. 3 shows a sewage treatment apparatus according to another embodiment of the present invention, in which the same members as those shown in FIG. 1 are given the same reference numerals. Here, as shown in FIG. 1, the microbial treatment tank 11 and the filtration treatment tank 12 are not separated, and as in the case of FIG.
A membrane module 13 and a stirring device 21 are both provided in the chamber.
発明の効果
以上述べたように本発明によると、微生物処理槽の内部
の液を十分に撹拌することができるとともに、この液と
空気とを十分に混合させることができ、このため良好な
条件下で微生物処理を行うことができる。Effects of the Invention As described above, according to the present invention, the liquid inside the microbial treatment tank can be sufficiently stirred, and this liquid and air can be sufficiently mixed. Microbial treatment can be performed with
第１図は本発明の一実施例の汚水処理装置の断面図、第
２図は従来の汚水処理装置の断面図、第３図は本発明の
他の実施例の汚水処理装置の断面図である。
１１・・・微生物処理槽、１２・・・ろ過処理槽、１３
・・・膜モジュール、１５・・・曝気用散気管、２１・
・・撹拌装置、２６・・・混合溶液。FIG. 1 is a sectional view of a sewage treatment device according to an embodiment of the present invention, FIG. 2 is a sectional view of a conventional sewage treatment device, and FIG. 3 is a sectional view of a sewage treatment device according to another embodiment of the present invention. be. 11... Microbial treatment tank, 12... Filtration treatment tank, 13
...Membrane module, 15...Aeration diffuser, 21.
... Stirring device, 26... Mixed solution.
Claims (1)
処理された混合溶液をろ過分離する膜モジュールを浸漬
し、この膜モジュールの下方に曝気用散気管を設け、前
記膜モジュールより槽外に吸引もしくは槽内の水圧で混
合溶液を取り出すことが出来るようにした一体型微生物
処理および膜分離装置において、微生物処理槽内の膜モ
ジュールが浸漬された場所以外の場所に前記槽内の混合
溶液を撹拌する手段を有することを特徴とする汚水処理
装置。 ２、汚水を微生物処理する微生物処理槽と、微生物処理
された混合溶液を膜モジュールによりろ過処理するろ過
処理槽と、前記ろ過処理槽の内部における膜モジュール
の下方に設けられた曝気用散気管と、前記ろ過処理槽と
微生物処理槽とをその上部および下部において連通およ
び遮断可能に接続する手段と、前記微生物処理槽の内部
を撹拌する手段とを有することを特徴とする汚水処理装
置。[Scope of Claims] 1. A membrane module for filtering and separating a mixed solution treated with microorganisms is immersed in the liquid of a microbial treatment tank for microbial treatment of wastewater, and an aeration diffuser pipe is provided below this membrane module. In an integrated microbial treatment and membrane separation device in which a mixed solution can be taken out of the tank from the membrane module by suction or by water pressure in the tank, the above-mentioned microbial treatment is carried out at a location other than the location where the membrane module is immersed in the microbial treatment tank. A sewage treatment device characterized by having means for stirring a mixed solution in a tank. 2. A microbial treatment tank that processes wastewater with microorganisms, a filtration tank that filters the microbially treated mixed solution using a membrane module, and an aeration diffuser pipe provided below the membrane module inside the filtration tank. A sewage treatment apparatus, comprising: means for connecting the filtration treatment tank and the microbial treatment tank so that they can communicate and shut off at the upper and lower portions thereof; and means for stirring the inside of the microbial treatment tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2048738A JPH03249995A (en) | 1990-02-28 | 1990-02-28 | Sewage treating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2048738A JPH03249995A (en) | 1990-02-28 | 1990-02-28 | Sewage treating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03249995A true JPH03249995A (en) | 1991-11-07 |
Family
ID=12811630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2048738A Pending JPH03249995A (en) | 1990-02-28 | 1990-02-28 | Sewage treating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03249995A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05154470A (en) * | 1991-12-04 | 1993-06-22 | Ebara Infilco Co Ltd | Membrane filter |
| JP2002205087A (en) * | 2001-01-09 | 2002-07-23 | Kubota Corp | Air diffuser |
| JP2004351247A (en) * | 2003-05-27 | 2004-12-16 | Yanmar Co Ltd | Portable type sewage treatment unit and construction method of this portable type sewage treatment unit |
| JP2016047492A (en) * | 2014-08-27 | 2016-04-07 | Ｊｆｅエンジニアリング株式会社 | Membrane separation active sludge treatment apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6460367A (en) * | 1987-08-31 | 1989-03-07 | Kubota Ltd | Microorganism treating device |
-
1990
- 1990-02-28 JP JP2048738A patent/JPH03249995A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6460367A (en) * | 1987-08-31 | 1989-03-07 | Kubota Ltd | Microorganism treating device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05154470A (en) * | 1991-12-04 | 1993-06-22 | Ebara Infilco Co Ltd | Membrane filter |
| JP2002205087A (en) * | 2001-01-09 | 2002-07-23 | Kubota Corp | Air diffuser |
| JP2004351247A (en) * | 2003-05-27 | 2004-12-16 | Yanmar Co Ltd | Portable type sewage treatment unit and construction method of this portable type sewage treatment unit |
| JP2016047492A (en) * | 2014-08-27 | 2016-04-07 | Ｊｆｅエンジニアリング株式会社 | Membrane separation active sludge treatment apparatus |
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