JPH07256281A - Waste water purifying method and tank - Google Patents
Waste water purifying method and tankInfo
- Publication number
- JPH07256281A JPH07256281A JP5548994A JP5548994A JPH07256281A JP H07256281 A JPH07256281 A JP H07256281A JP 5548994 A JP5548994 A JP 5548994A JP 5548994 A JP5548994 A JP 5548994A JP H07256281 A JPH07256281 A JP H07256281A
- Authority
- JP
- Japan
- Prior art keywords
- waste water
- wastewater
- membrane
- chamber
- treatment chamber
- 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
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)
- Treatment Of Biological Wastes In General (AREA)
- Activated Sludge Processes (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は便所、洗面所、風呂、厨
房などからの廃水を浄化する方法と浄化槽に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a septic tank for purifying waste water from a toilet, washroom, bath, kitchen or the like.
【０００２】[0002]
【従来の技術】活性汚泥による生物的な処理と分離膜に
よる物理的な処理とを組み合わせることで、廃水を処理
する浄化槽として、実開平４−９９２９７号公報に開示
されるものが知られている。この公報に開示される浄化
槽は、高濃度活性汚泥処理槽内に設けた分離膜モジュー
ルが粗大固形物によって目詰りを起こすことを防止する
ために、高濃度活性汚泥処理槽に流入する廃水中の粗大
固形物を予めスクリーンによって除去するようにしてい
る。2. Description of the Related Art As a septic tank for treating wastewater by combining biological treatment with activated sludge and physical treatment with a separation membrane, one disclosed in Japanese Utility Model Publication No. 4-99297 is known. . The septic tank disclosed in this publication discloses that the separation membrane module provided in the high-concentration activated sludge treatment tank does not cause clogging due to coarse solid matter, so that the wastewater flowing into the high-concentration activated sludge treatment tank is treated. Coarse solids are previously removed by a screen.
【０００３】[0003]
【発明が解決しようとする課題】上述した膜分離装置を
組み込んだ浄化槽の高濃度活性汚泥処理槽内には、粗大
固形物を除いても好気性菌や嫌気性菌を主体とする微生
物や有機物等の被濾過物粒子が浮遊しており、これら被
濾過物粒子が分離膜の廃水側表面に濃縮されてゲル状に
堆積し、この被濾過物層が厚くなると急激に膜の透過流
束が低下する。ここで、被濾過物層の堆積を抑制するに
は、廃水中の微生物の濃度を少なくして粘度を下げれば
よいが、微生物の濃度を少なくすると生物処理効率が低
下してしまう。In the high-concentration activated sludge treatment tank of the septic tank in which the above-mentioned membrane separation device is incorporated, microorganisms and organic substances mainly composed of aerobic bacteria and anaerobic bacteria are removed even if coarse solid matters are removed. Particles to be filtered such as are suspended, these particles to be filtered are concentrated on the surface of the separation membrane on the wastewater side and are deposited in a gel form.When the layer to be filtered becomes thick, the permeation flux of the membrane suddenly increases. descend. Here, in order to suppress the deposition of the material layer to be filtered, it is sufficient to reduce the concentration of microorganisms in the wastewater to reduce the viscosity, but reducing the concentration of microorganisms lowers the biological treatment efficiency.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決すべく本
発明に係る廃水の浄化方法は、廃水を生物的に処理した
後の廃水の粘度を予め所定値以下に下げ、この粘度が下
がった廃水を分離膜によって透過液と保持液あるいは濃
縮液とに分離するようにした。ここで、好ましい粘度は
２００ｃｐ以下であり、この粘度にするには分離膜に供
給される廃水の微生物濃度を３０ｋｇ／ｍ3以下とす
る。In order to solve the above problems, the method for purifying wastewater according to the present invention reduces the viscosity of wastewater after biologically treating the wastewater to a predetermined value or less, and the viscosity is lowered. The waste water was separated by a separation membrane into a permeate and a retentate or a concentrate. Here, the preferable viscosity is 200 cp or less, and in order to achieve this viscosity, the microbial concentration of the waste water supplied to the separation membrane is set to 30 kg / m 3 or less.
【０００５】また、本発明に係る浄化装置は、隔壁にて
浄化槽内を上流側の生物処理室と下流側の膜処理室とを
画成するとともに、これら生物処理室と膜処理室との間
に粘度調整室を設けた。Further, in the purifying apparatus according to the present invention, the partition wall defines an upstream biological treatment chamber and a downstream membrane treatment chamber in the septic tank, and the space between the biological treatment chamber and the membrane treatment chamber is defined. A viscosity adjusting chamber was set up.
【０００６】更に本発明に係る別の浄化装置は、浄化槽
は生物処理室内に膜分離装置を浸漬し、また廃水中には
その表面に浮遊懸濁成分を吸着するか、或いは微生物が
付着するキャッチャー粒子を混入した。Further, in another purifying apparatus according to the present invention, the septic tank is a catcher in which the membrane separator is immersed in the biological treatment chamber, and the surface of the waste water adsorbs suspended suspended components or microorganisms adhere. Incorporated particles.
【０００７】[0007]
【作用】膜分離装置を配置した室では廃水中を浮遊する
微生物の量を少なくすることで、膜分離装置に供給され
る廃水の粘度が低くなり、その結果、分離膜表面に形成
される被濾過物層も厚くならない。By reducing the amount of microorganisms floating in the wastewater in the chamber where the membrane separation device is placed, the viscosity of the wastewater supplied to the membrane separation device is lowered, and as a result, the coating formed on the surface of the separation membrane is reduced. The filtrate layer also does not become thick.
【０００８】[0008]
【実施例】以下に本発明の実施例を添付図面に基づいて
説明する。ここで、図１は本発明に係る浄化槽の断面
図、図２は廃水中の微生物濃度（ＭＬＳＳ）と透過流束
（Ｊ）及び粘度（η）との関係を示すグラフであり、浄
化槽本体１内は隔壁２，３によって生物処理室Ｓ１、粘
度調整室Ｓ２及び膜処理室Ｓ３に画成されている。Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a cross-sectional view of the septic tank according to the present invention, and FIG. 2 is a graph showing the relationship between the microbial concentration (MLSS) in the wastewater, the permeation flux (J) and the viscosity (η). The interior is partitioned by partition walls 2 and 3 into a biological treatment chamber S1, a viscosity adjusting chamber S2, and a membrane treatment chamber S3.
【０００９】生物処理室Ｓ１の上部には廃水の導入パイ
プ４が取り付けられ、生物処理室Ｓ１の底部には散気管
５が設けられ、この散気管５から生物処理室Ｓ１内にエ
アを間欠的に供給するようにしている。尚、エアを供給
している間は生物処理室Ｓ１内では好気性処理が行わ
れ、エアの供給を停止している間は嫌気性処理が行われ
る。A wastewater introduction pipe 4 is attached to the upper part of the biological treatment chamber S1, and an air diffuser pipe 5 is provided at the bottom of the biological treatment chamber S1. Air is intermittently supplied from the diffuser pipe 5 into the biological treatment chamber S1. I am trying to supply it to. The aerobic treatment is carried out in the biological treatment chamber S1 while the air is being supplied, and the anaerobic treatment is carried out while the supply of the air is stopped.
【００１０】ここで、好気性処理では吹込まれた酸素を
利用して活性汚泥に含まれる硝化菌により原液中に含ま
れるアンモニア態窒素（ＮＨ4 +）が硝酸態窒素（Ｎ
Ｏ3 -）や亜硝酸態窒素（ＮＯ2 -）に酸化分解され、また
未分解有機物は活性汚泥中に取り込まれる。また嫌気性
処理では活性汚泥に含まれる酸生成菌によって合併排水
中の有機物を酢酸（ＣＨ3ＣＯＯＨ）やプロピオン酸
（ＣＨ3ＣＨ2ＣＯＯＨ）等の有機酸に低分子化し、更に
これら有機酸をメタン菌などによってメタン（ＣＨ4）
や二酸化炭素（ＣＯ2）のガスに変換し、更に、タンパ
ク質や尿素などの窒素分の分解物であるアンモニア態窒
素（ＮＨ4 +）を生成する。Here, in the aerobic treatment, the nitrogen nitrogen (N 4 + ) contained in the stock solution is converted to nitrate nitrogen (N 4 + ) by the nitrifying bacteria contained in the activated sludge by utilizing the blown oxygen.
O 3 − ) and nitrite nitrogen (NO 2 − ) are oxidatively decomposed, and undecomposed organic matter is taken into activated sludge. In the anaerobic treatment, acid-producing bacteria contained in the activated sludge reduce the organic matter in the combined wastewater into organic acids such as acetic acid (CH 3 COOH) and propionic acid (CH 3 CH 2 COOH). Methane (CH 4 ) due to methane bacteria
It is converted into a gas of carbon dioxide (CO 2 ) or carbon dioxide (CO 2 ), and further, ammonia nitrogen (NH 4 + ) which is a decomposition product of nitrogen components such as protein and urea is generated.
【００１１】また、粘度調整室Ｓ２を画成する隔壁３の
下部は生物処理室Ｓ１側に傾斜壁３ａとし、粘度調整室
Ｓ２が沈降分離室としても機能するように構成されてい
る。Further, the lower portion of the partition wall 3 which defines the viscosity adjusting chamber S2 is an inclined wall 3a on the biological treatment chamber S1 side, and the viscosity adjusting chamber S2 is also configured to function as a sedimentation separation chamber.
【００１２】更に膜処理室Ｓ３内には、膜分離装置とし
て中空糸状膜モジュール６を配置し、この中空糸状膜モ
ジュール６の下方に散気管７を設け、中空糸状膜モジュ
ール６の上端からは配管８を導出し、ポンプ９を介して
透過液を排出するようにし、また膜処理室Ｓ３底部に溜
まった汚泥を配管１０およびポンプ１１を介して生物処
理室Ｓ１に戻すようにしている。Further, in the membrane processing chamber S3, a hollow fiber membrane module 6 is arranged as a membrane separation device, an air diffusing pipe 7 is provided below the hollow fiber membrane module 6, and a pipe is provided from the upper end of the hollow fiber membrane module 6. 8 is led out so that the permeated liquid is discharged through the pump 9, and the sludge accumulated at the bottom of the membrane treatment chamber S3 is returned to the biological treatment chamber S1 through the pipe 10 and the pump 11.
【００１３】ここで、中空糸状膜モジュール６の下方に
配置した散気管７は、中空糸状膜モジュール６に沿って
気液二相流を形成し、経時的に中空糸状膜の表面に堆積
した被濾過物層を振動等によって掻き取って除去するた
めのものであり、斯かる掻き取りを効果的に行う気体量
（Ｖ1）は、中空糸状膜モジュール６の膜処理室Ｓ３底
面への単位投影面積当り且つ単位時間当り、０．５≦Ｖ
1≦３００（m3m-2h-1）とするのが好ましく、最適範囲
は１．０≦Ｖ1≦２００（m3m-2h-1）である。Here, the air diffusing pipe 7 arranged below the hollow fiber membrane module 6 forms a gas-liquid two-phase flow along the hollow fiber membrane module 6 and is deposited on the surface of the hollow fiber membrane over time. The filtration material layer is for scraping and removing it by vibration or the like, and the gas amount (V 1 ) for effectively scraping the filtration layer is a unit projection on the bottom surface of the membrane processing chamber S3 of the hollow fiber membrane module 6. 0.5 ≦ V per area and per unit time
It is preferable that 1 ≤ 300 (m 3 m -2 h -1 ), and the optimum range is 1.0 ≤ V 1 ≤ 200 (m 3 m -2 h -1 ).
【００１４】以上において、導入パイプ４から生物処理
室Ｓ１内に導入された廃水は、生物処理室Ｓ１内で好気
性処理及び嫌気性処理が施された後に粘度調整室Ｓ２に
入る。粘度調整室Ｓ２内では生物処理後の廃水中に浮遊
する微生物等の懸濁成分を沈降分離し、廃水の粘度を低
下せしめる。In the above, the wastewater introduced into the biological treatment chamber S1 from the introduction pipe 4 enters the viscosity adjusting chamber S2 after being subjected to aerobic treatment and anaerobic treatment in the biological treatment chamber S1. In the viscosity adjusting chamber S2, suspended components such as microorganisms floating in the wastewater after biological treatment are separated by sedimentation to reduce the viscosity of the wastewater.
【００１５】そして、粘度が低下した廃水は膜処理室Ｓ
３内に送られ、中空糸状膜モジュール６によって濃縮液
と透過液に分離される。ここで、図２にも示すように、
廃水の粘度が高いと、分離膜表面に形成される被濾過物
層が厚くなり透過流束が低下するので、廃水の粘度は２
００ｃｐ以下とし、好ましくは５０ｃｐ以下、最適は３
０ｃｐ以下とする。また廃水の粘度を２００ｃｐ以下と
するには廃水の微生物濃度を３０ｋｇ／ｍ3以下とす
る。Then, the waste water whose viscosity has decreased is treated in the membrane treatment chamber S.
It is sent into the inside 3 and is separated into the concentrated liquid and the permeated liquid by the hollow fiber membrane module 6. Here, as shown in FIG.
If the viscosity of the wastewater is high, the layer of the substance to be filtered formed on the surface of the separation membrane becomes thick and the permeation flux decreases, so that the viscosity of the wastewater is 2%.
00cp or less, preferably 50cp or less, optimally 3
It should be 0 cp or less. Further, in order to reduce the viscosity of the wastewater to 200 cp or less, the microbial concentration of the wastewater is set to 30 kg / m 3 or less.
【００１６】尚、実施例にあっては沈降分離室が粘度調
整室Ｓ２を兼ねるようにしたが、沈降分離の代りに濾床
を配置し、濾床によって微生物を捕獲することで微生物
濃度を３０ｋｇ／ｍ3以下とすることもできる。In the embodiment, the sedimentation separation chamber also serves as the viscosity adjusting chamber S2. However, instead of sedimentation separation, a filter bed is arranged and microorganisms are captured by the filter bed to obtain a microorganism concentration of 30 kg. / M 3 or less can be used.
【００１７】図３は生物処理室に膜分離装置を配置した
浄化槽の断面図、図４は図３に示した浄化槽の作用を示
す図であり、この浄化槽は生物処理室Ｓ１内に平膜モジ
ュール１３を浸漬し、配管１４及びポンプ１５を介して
透過液を取り出すようにし、また廃水中にはキャッチャ
ー粒子１６を浮遊せしめ、キャッチャー粒子１６を散気
管１８からのエアにて生物処理室Ｓ１内を循環せしめ、
この間にキャッチャー粒子１６表面に浮遊懸濁成分１９
を吸着する或いは微生物を付着させることで、廃水の粘
度を低下せしめるようにしている。また、キャッチャー
粒子１６が気液固三相流を形成することで、平膜モジュ
ール１３表面に被濾過物層が厚く形成されるのを掻き取
り効果によって防止できる。FIG. 3 is a sectional view of a septic tank in which a membrane separation device is arranged in the biological treatment chamber, and FIG. 4 is a view showing the operation of the septic tank shown in FIG. 3, which is a flat membrane module in the biological treatment chamber S1. 13 is immersed, the permeate is taken out through the pipe 14 and the pump 15, the catcher particles 16 are suspended in the waste water, and the catcher particles 16 are blown into the biological treatment chamber S1 by air from the air diffuser 18. Circulate,
During this time, the suspended suspended components 19 on the surface of the catcher particles 16
The viscosity of the wastewater is reduced by adsorbing or adsorbing microorganisms. Further, since the catcher particles 16 form a gas-liquid solid three-phase flow, it is possible to prevent a thick layer of the substance to be filtered from being formed on the surface of the flat sheet membrane module 13 by the scraping effect.
【００１８】キャッチャー粒子１６としては例えば菌体
の担体等が考えられ、その粒径は０．００１ｍｍ以上１
００ｍｍ以下とする。また掻き取りを効果的に行う気体
量（Ｖ1）は、平膜モジュール１３の膜処理室Ｓ３底面
への単位投影面積当り且つ単位時間当り、０．２≦Ｖ1
≦２８０（m3m-2h-1）とし、好ましくは０．５≦Ｖ1≦
１００（m3m-2h-1）とする。The catcher particles 16 may be, for example, a carrier of bacterial cells, and have a particle size of 0.001 mm or more 1
It is set to 00 mm or less. The amount of gas (V 1 ) for effectively scraping is 0.2 ≦ V 1 per unit projected area of the flat film module 13 onto the bottom surface of the film processing chamber S3 and per unit time.
≦ 280 (m 3 m −2 h −1 ) and preferably 0.5 ≦ V 1 ≦
It is set to 100 (m 3 m -2 h -1 ).
【００１９】[0019]
【発明の効果】以上に説明した如く本発明によれば、微
生物による生物的な処理と分離膜による物理的な処理と
を１つの装置内で行うようにした浄化方法或いはこの方
法を実施する浄化槽として、生物処理室と膜分離処理室
とを別々に設ける場合には、膜分離装置の上流側に粘度
調整室を設け、また膜分離装置を生物処理室に配置する
場合には、浮遊懸濁成分を吸着する或いは微生物を付着
させるキャッチャー粒子を廃水中に混入することで、生
物処理の段階では菌体濃度を高く維持し、膜分離の段階
では廃水の粘度を低くすることができ、その結果、分離
膜表面に形成される被濾過物層も厚くならず、透過流束
を一定に維持できる。As described above, according to the present invention, a purification method in which a biological treatment with microorganisms and a physical treatment with a separation membrane are performed in one apparatus, or a purification tank for carrying out this method. As an example, when a biological treatment chamber and a membrane separation treatment chamber are provided separately, a viscosity adjusting chamber is provided on the upstream side of the membrane separation device, and when the membrane separation device is placed in the biological treatment chamber, a floating suspension is used. By mixing catcher particles that adsorb components or attach microorganisms to wastewater, it is possible to maintain a high bacterial cell concentration during the biological treatment stage and reduce the viscosity of the wastewater during the membrane separation stage. The layer to be filtered formed on the surface of the separation membrane does not become thick, and the permeation flux can be maintained constant.
【図１】本発明に係る浄化槽の断面図FIG. 1 is a sectional view of a septic tank according to the present invention.
【図２】廃水中の微生物濃度と透過流束及び粘度との関
係を示すグラフFIG. 2 is a graph showing the relationship between microbial concentration in wastewater, permeation flux and viscosity.
【図３】生物処理室に膜分離装置を配置した浄化槽の断
面図FIG. 3 is a sectional view of a septic tank in which a membrane separation device is arranged in a biological treatment chamber.
【図４】図３に示した浄化槽の作用を示す図FIG. 4 is a diagram showing the operation of the septic tank shown in FIG.
１…浄化槽本体、２，３…隔壁、５，７…散気管、６，
１３…膜モジュール、１６…キャッチャー粒子、Ｓ１…
生物処理室、Ｓ２…粘度調整室、Ｓ３…膜処理室。1 ... septic tank main body, 2, 3 ... partition wall, 5, 7 ... air diffuser, 6,
13 ... Membrane module, 16 ... Catcher particles, S1 ...
Biological processing room, S2 ... Viscosity adjusting room, S3 ... Membrane processing room.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 辻 隆正 福岡県北九州市小倉北区中島２丁目１番１ 号 東陶機器株式会社内 (72)発明者 野口 朋子 福岡県北九州市小倉北区中島２丁目１番１ 号 東陶機器株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takamasa Tsuji 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu, Fukuoka Prefecture Totoki Kikai Co., Ltd. (72) Tomoko Noguchi 2 Nakajima, Kokurakita-ku, Kitakyushu, Fukuoka 1st-1st Totoki Equipment Co., Ltd.
Claims (5)
後、この廃水を分離膜によって透過液と保持液あるいは
濃縮液とに分離するようにした廃水の浄化方法におい
て、前記分離膜に供給する廃水中の微生物濃度を３０ｋ
ｇ／ｍ3以下として廃水の粘度を２００ｃｐ以下にする
ことを特徴とする廃水の浄化方法。1. A method for purifying wastewater, which comprises biologically treating wastewater with microorganisms and then separating the wastewater into a permeate and a retentate or a concentrate by means of a separation membrane. Microbial concentration in the 30k
A method for purifying wastewater, characterized in that the viscosity of the wastewater is set to g / m 3 or less and the viscosity of the wastewater is set to 200 cp or less.
浄化槽において、この浄化槽は隔壁にて上流側の生物処
理室と下流側の膜処理室とを画成するとともに、これら
生物処理室と膜処理室との間に粘度調整室を設けたこと
を特徴とする浄化槽。2. A septic tank for biologically treating wastewater with microorganisms. The septic tank defines a biological treatment chamber on the upstream side and a membrane treatment chamber on the downstream side with a partition wall, and the biological treatment chamber and the membrane treatment. A septic tank characterized in that a viscosity adjusting chamber is provided between the chamber and the chamber.
粘度調整室とを画成する隔壁３の下部は生物処理室側へ
の傾斜壁となっていることを特徴とする浄化槽。3. The septic tank according to claim 2, wherein a lower part of the partition wall 3 which defines the viscosity adjusting chamber is an inclined wall toward the biological treatment chamber side.
浄化槽において、この浄化槽は生物処理室内に膜分離装
置を浸漬し、また廃水中にはその表面に浮遊懸濁成分を
吸着するか微生物が付着するキャッチャー粒子を混入し
たことを特徴とする浄化槽。4. In a septic tank for biologically treating wastewater with microorganisms, the septic tank is immersed in a membrane separator in the biological treatment chamber, and the surface of the wastewater is adsorbed by suspended suspended components or microorganisms are attached. A septic tank characterized by containing catcher particles.
キャッチャー粒子は微生物の担体とし、その粒子径は
０．００１ｍｍ以上１００ｍｍ以下としたことを特徴と
する浄化槽。5. The septic tank according to claim 4, wherein the catcher particles serve as a carrier for microorganisms, and the particle size is 0.001 mm or more and 100 mm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5548994A JPH07256281A (en) | 1994-03-25 | 1994-03-25 | Waste water purifying method and tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5548994A JPH07256281A (en) | 1994-03-25 | 1994-03-25 | Waste water purifying method and tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07256281A true JPH07256281A (en) | 1995-10-09 |
Family
ID=13000050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5548994A Pending JPH07256281A (en) | 1994-03-25 | 1994-03-25 | Waste water purifying method and tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07256281A (en) |
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| KR100371313B1 (en) * | 2000-10-23 | 2003-02-07 | 주식회사 한스환경엔지니어링 | A Sewage And Waste water Treating Filter |
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| JP2006082024A (en) * | 2004-09-16 | 2006-03-30 | Kurita Water Ind Ltd | Biological treatment apparatus |
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| JP2010042329A (en) * | 2008-08-08 | 2010-02-25 | Sumitomo Electric Fine Polymer Inc | Hollow fiber membrane module |
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| JP2013515605A (en) * | 2010-03-08 | 2013-05-09 | 仁何大学 産学協力団 | Fluidized bed separation membrane bioreactor |
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