JPS61242607A - Preparation of hollow yarn type module having slit - Google Patents

Preparation of hollow yarn type module having slit

Info

Publication number
JPS61242607A
JPS61242607A JP8450585A JP8450585A JPS61242607A JP S61242607 A JPS61242607 A JP S61242607A JP 8450585 A JP8450585 A JP 8450585A JP 8450585 A JP8450585 A JP 8450585A JP S61242607 A JPS61242607 A JP S61242607A
Authority
JP
Japan
Prior art keywords
adhesive
slit
flexible body
hollow fiber
case
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
JP8450585A
Other languages
Japanese (ja)
Inventor
Takayuki Yokoyama
高幸 横山
Toshiaki Kikuchi
敏明 菊地
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.)
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry 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 Asahi Chemical Industry Co Ltd filed Critical Asahi Chemical Industry Co Ltd
Priority to JP8450585A priority Critical patent/JPS61242607A/en
Publication of JPS61242607A publication Critical patent/JPS61242607A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To easily form a slit penetrating through a bonded fixing part of a hollow yarn membrane by previously arranging a scarcely adhesive flexible body which has been formed to a same shape as a desired slit to the part for bonding, then removing the flexible body after curing the charged adhesive. CONSTITUTION:A flexible body 2, such as polystyrene foam, comprising a scarcely adhesive material to an adhesive material to be used for bonding, formed to a same shape as a desired slit 7, is previously arranged together with a hollow yarn bundle 3 in a case 1. The adhesive material 6 is charged from a vessel 4 through a hose 5 into the case 1 and a bonded part is formed by the centrifugal bonding method. The flexible body 2 alone is removed from the bonded part after the adhesive material is cured. Thus, a slit 7 is formed to the part left after removal of the flexible body 2.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、汚染物を含む原水等の口過に使用するスリン
トを有する中空糸型モジュールの製造方法に関する。
DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for manufacturing a hollow fiber module having a slint used for filtering raw water containing pollutants.

(従来技術とその問題点) 金属コロイド等のコロイド状物質を含む原水或はその他
の汚染物を含む原水等を中空糸型モジュールを用いて外
圧法で全口過する場合、半透性の膜壁を有する中空糸の
外面にはコロイド物質等の汚染物が付着するので、口過
能力は次第に低ドし、また、中空糸の耐用年数も短くな
る。そこで、中空糸の外面に刺着したコロイド等の汚染
物を取り除くために逆洗等が行なわれているが充分な効
果は得られていない。
(Prior art and its problems) When raw water containing colloidal substances such as metal colloids or raw water containing other contaminants is passed through the entire mouth by an external pressure method using a hollow fiber type module, a semi-permeable membrane is used. Since contaminants such as colloidal substances adhere to the outer surface of the hollow fibers having walls, the filtration ability gradually decreases and the service life of the hollow fibers is also shortened. Therefore, backwashing and the like have been carried out to remove contaminants such as colloids stuck to the outer surface of the hollow fibers, but sufficient effects have not been obtained.

本発明者はこの問題の解決のために、先に実願昭59−
188553号において中空糸型モジュールの接着固定
部に、該接着固定部を貫通するスリ・ントを設け、口過
水量が低下したとき、原水の送給を止めて該スリットよ
り気体又は気体を含む液体を導入することによって、中
空糸に付着したコロイド物質等の汚染物を取り除くこと
を提案した。この提案によれば、コロイド等の除去に顕
著な効果を奏すること、が確認された。しかし、上記先
願では、スリットを設けるために、 (イ)予め接着固定部に、接着剤と同材質の板状体を配
置しておき、接着剤を流し込み硬化した後に、該板状体
にスリット加工をする方法。または(ロ)予めスリット
加工を施した板状体を接着固定部に配置しておいて、ス
リット内に接着剤が入らないように注意しながら接着剤
を流し込み硬化させる方法。を採用している。
In order to solve this problem, the present inventor first applied for
In No. 188553, a slit is provided in the adhesively fixed part of a hollow fiber module to pass through the adhesively fixed part, and when the amount of water passing through the mouth decreases, the feed of raw water is stopped and gas or gas-containing liquid is removed from the slit. We proposed that contaminants such as colloidal substances attached to the hollow fibers be removed by introducing them. It has been confirmed that this proposal has a remarkable effect on removing colloids and the like. However, in the above-mentioned prior application, in order to provide the slits, (a) a plate-like body made of the same material as the adhesive is placed in the adhesive fixing part in advance, and after the adhesive is poured and cured, the plate-like body is How to make slits. Or (b) A method in which a plate-shaped body with slits processed in advance is placed on the adhesive fixing part, and the adhesive is poured and cured while being careful not to get the adhesive into the slits. is adopted.

(イ)の方法では、後加工の際に中空糸が傷ついたり、
切削りカスがモジュール内に残る恐れがあり、(ロ)の
方法では、スリット内に接着剤が入らないようにシール
するのは簡単ではなく、スリット加工を施した板状体を
接着剤が流入する面より上側に突出させておく必要があ
る。一方、接着剤面よりも上側に板状体が突出して固定
シールされると、スリットより気体又は気体を含む液体
を導入して中空糸の外面から汚染物を落下させた際に、
汚染物の取り出しが困難である等の問題点があった。
With method (a), the hollow fibers may be damaged during post-processing,
There is a risk that cutting debris may remain inside the module, and with method (b), it is not easy to seal the slits to prevent adhesive from entering, and adhesive may flow into the slit plate. It is necessary to make it protrude above the surface to be used. On the other hand, if the plate-shaped body protrudes above the adhesive surface and is fixedly sealed, when gas or a liquid containing gas is introduced through the slit to cause contaminants to fall from the outer surface of the hollow fiber,
There were problems such as difficulty in removing contaminated materials.

(発明が解決しようとする問題点) 本発明は、前記した問題点を解決する□もので、スリッ
トの形成が容易で、汚染物を簡単にしかも効率的にモジ
ュール外に除去できる中空糸型モジュールの製造方法を
提供する。
(Problems to be Solved by the Invention) The present invention solves the above-mentioned problems, and is a hollow fiber module in which slits can be easily formed and contaminants can be easily and efficiently removed from the module. Provides a manufacturing method.

(問題点を解決するための手段) 本発明は、中空糸の両端を接着剤でケース内に・固定シ
ールし、中空糸の一端は開口し、他端は閉止した中空糸
型モジュールの製造方法において、閉止端側の中空糸を
固定シールする際に、接着剤と接着し難く、しかも所望
のスリットと同一・形状に成形した可撓性体を、ケース
内の接着部に予め配置しておき、接着剤を流し込み硬化
した後に、該可撓性体を除去して、スリットを形成する
ことを特徴とする。
(Means for Solving the Problems) The present invention provides a method for manufacturing a hollow fiber module in which both ends of the hollow fibers are fixedly sealed in a case with an adhesive, one end of the hollow fibers is open, and the other end is closed. When fixing and sealing the hollow fiber on the closed end side, a flexible body that is difficult to bond with adhesive and is molded in the same shape as the desired slit is placed in advance at the adhesive part inside the case. , the adhesive is poured and cured, and then the flexible body is removed to form a slit.

(実施態様) 次に、本発明の方法を図面によって説明する。(Embodiment) Next, the method of the present invention will be explained with reference to the drawings.

第1図は、中空糸型モジュールの製造方法の1例を示し
、第2図の(a)〜(d)は、スリ7I・の種々の変形
例を示す。
FIG. 1 shows an example of a method for manufacturing a hollow fiber module, and FIGS. 2(a) to 2(d) show various modifications of the pickpocket 7I.

第1図において、ケース(1)内には、予め可撓性体(
2)と中空糸束(3)を配置しておき、容器(4)から
ホース(5) +=よって接着剤(6)を遠心接着法等
によってケース内に注入し接着部を形成する。接着剤が
硬化した後、接着部から可撓性体(2)のみを除去して
除去あとに、スリット(7)を形成する。
In Fig. 1, a flexible body (
2) and the hollow fiber bundle (3) are placed in advance, and the adhesive (6) is injected into the case from the container (4) to the hose (5) by centrifugal bonding or the like to form a bonded portion. After the adhesive has hardened, only the flexible body (2) is removed from the adhesive portion, and after removal, a slit (7) is formed.

可撓性体としては、接着剤と接着し難い材料製のものを
、所望のスリットと同一形状に成形あるい゛は、組立て
て配置する。可撓性体の除去手段としては引き抜き、熱
又は溶剤による除去等がある。可撓性体として、発泡ポ
リスチレン、発泡ウレタン、−発泡゛ポリエチレン、ゴ
ム等の可撓性の材料を単独で用いるか、或は接着剤と剥
離し易いポリエチレンフィルム、ポリエステルフィルム
等で包んで使用すれば、接着剤の硬化後に、引き抜き等
の機械的手段で容易に除去できる。
The flexible body is made of a material that is difficult to adhere to the adhesive and is molded or assembled into the same shape as the desired slit. Examples of means for removing the flexible body include pulling it out, removing it with heat or a solvent, and the like. As the flexible body, a flexible material such as foamed polystyrene, foamed urethane, foamed polyethylene, or rubber may be used alone, or it may be wrapped in a polyethylene film, polyester film, etc. that is easily peeled off from the adhesive. For example, after the adhesive has hardened, it can be easily removed by mechanical means such as pulling.

また、可撓性体としてパラフィン、ホットメルト剤等を
使用すれば、接着剤の硬化後加熱によって溶かし出して
除去できる。さらに、発泡スチロール等を可撓性体とし
て使用し溶剤処理によって除去することもできる。
Furthermore, if paraffin, a hot melt agent, or the like is used as the flexible material, the adhesive can be removed by being melted and removed by heating after hardening. Furthermore, it is also possible to use Styrofoam or the like as a flexible body and remove it by solvent treatment.

第2図の(a)〜(d)に示すように、可撓性体の配置
を変えることによって、種々の形状のスリットを接着部
に形成できる。次に、本発明の特徴を実施例によって説
明する。
As shown in FIGS. 2(a) to 2(d), slits of various shapes can be formed in the bonded portion by changing the arrangement of the flexible body. Next, the features of the present invention will be explained using examples.

(実施例り 厚さ4mm 、長さ30mm、高さ100mmの発泡ス
チロール板を、厚さ15pLmの低密度ポリエチレン袋
で包んで可撓性体(2)を用意り、た。この可撓性体4
&を第2図(a)に示すように、中空糸束(3)と共に
内径3インチの塩ビ製ケース(1)内に配置し、第1図
に示すようにケース底部より2液型のエポキシ樹脂(6
)をヘッド圧によって注入した。
(Example: A flexible body (2) was prepared by wrapping a polystyrene foam board with a thickness of 4 mm, a length of 30 mm, and a height of 100 mm in a low-density polyethylene bag with a thickness of 15 pLm.
& is placed in a PVC case (1) with an inner diameter of 3 inches together with the hollow fiber bundle (3) as shown in Figure 2 (a), and two-component epoxy is poured into the case from the bottom of the case as shown in Figure 1. Resin (6
) was injected by head pressure.

樹脂が硬化後、接着部の高さを規定の寸法に切断し、−
4−記接着部から、発泡スチロール板をポリエチレンの
袋ごと抜き出して、スリットを形成した。
After the resin has hardened, cut the height of the adhesive part to the specified size, and -
4- The Styrofoam board was pulled out along with the polyethylene bag from the bonded area to form a slit.

(実施例2) 1■撓性体として発泡スチロール板のみを使用し、その
他は実施例1と同一条件で接着部を形成した。接着部の
高さを規定の寸法に切断した後、接着部をアセトンに数
分間浸漬することにより、発泡スチロールを溶出させて
スリットを形成した。実施例1および2で得られた中空
糸型モジュールは、いずれも優れた汚染物の除去効果を
示した。
(Example 2) 1. A bonded portion was formed under the same conditions as in Example 1 except that only a foamed polystyrene plate was used as the flexible body. After cutting the bonded portion to a specified height, the bonded portion was immersed in acetone for several minutes to dissolve the polystyrene foam and form a slit. The hollow fiber modules obtained in Examples 1 and 2 both exhibited excellent contaminant removal effects.

(発明の効果) 本発明によれば、汚染物の除去が用意で1口過効率の高
い中空糸型モジュールが得られる。
(Effects of the Invention) According to the present invention, a hollow fiber module can be obtained in which contaminants can be easily removed and the per-port efficiency is high.

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

第1図は、本願方法の1例を示す説明図。第2図は、ス
リットの種々の変形例を示す図である。 1ケース      5ホース 2可撓性体     6接着剤 3中空糸      7スリツト 4容器
FIG. 1 is an explanatory diagram showing an example of the method of the present application. FIG. 2 is a diagram showing various modifications of the slit. 1 case 5 hose 2 flexible body 6 adhesive 3 hollow fiber 7 slit 4 containers

Claims (2)

【特許請求の範囲】[Claims] (1)中空糸の両端を接着剤でケース内に固定シールし
、中空糸の一端は開口し、他端は閉止した中空糸型モジ
ュールの製造方法において、閉止端側の中空糸を固定シ
ールする際に、接着剤と接着し難く、しかも所望のスリ
ットと同一形状に成形した可撓性体を、ケース内の接着
部に予め配置しておき、接着剤を流し込み硬化した後に
、該可撓性体を除去して、スリットを形成することを特
徴とするスリットを有する中空糸型モジュールの製造方
法。
(1) In a method for manufacturing a hollow fiber module in which both ends of the hollow fiber are fixedly sealed in the case with adhesive, one end of the hollow fiber is open, and the other end is closed, the hollow fiber on the closed end side is fixedly sealed. In this case, a flexible body that is difficult to bond with the adhesive and is molded in the same shape as the desired slit is placed in advance at the adhesive part in the case, and after the adhesive is poured and cured, the flexible body is 1. A method for manufacturing a hollow fiber module having slits, the method comprising removing a body to form a slit.
(2)可撓性体を、加熱または溶剤処理によって除去す
る特許請求の範囲第1項記載の方法。
(2) The method according to claim 1, wherein the flexible body is removed by heating or solvent treatment.
JP8450585A 1985-04-22 1985-04-22 Preparation of hollow yarn type module having slit Pending JPS61242607A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8450585A JPS61242607A (en) 1985-04-22 1985-04-22 Preparation of hollow yarn type module having slit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8450585A JPS61242607A (en) 1985-04-22 1985-04-22 Preparation of hollow yarn type module having slit

Publications (1)

Publication Number Publication Date
JPS61242607A true JPS61242607A (en) 1986-10-28

Family

ID=13832498

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8450585A Pending JPS61242607A (en) 1985-04-22 1985-04-22 Preparation of hollow yarn type module having slit

Country Status (1)

Country Link
JP (1) JPS61242607A (en)

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0952885A4 (en) * 1996-12-20 2001-04-04 Usf Filtration & Separations Scouring method
JP2002525197A (en) * 1998-09-25 2002-08-13 ユー・エス・フィルター・ウェイストウォーター・グループ・インコーポレイテッド Cleaning device and cleaning method for filtration membrane module
EP1115474A4 (en) * 1998-09-25 2005-03-30 Us Filter Wastewater Group Inc Apparatus and method for cleaning membrane filtration modules
US6964741B2 (en) 1995-08-11 2005-11-15 Zenon Environmental Inc. Apparatus for withdrawing permeate using an immersed vertical skein of hollow fiber membranes
US7022231B2 (en) 1995-08-11 2006-04-04 Zenon Environmental Inc. Apparatus incorporating potted hollow fiber membranes
US7087173B2 (en) 1995-08-11 2006-08-08 Zenon Environmental Inc. Inverted cavity aerator for membrane module
USRE39294E1 (en) 1995-08-11 2006-09-19 Zenon Environmental Inc. Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate
WO2007040035A1 (en) * 2005-09-30 2007-04-12 Kureha Corporation Hollow fiber bundle, process for producing hollow fiber bundle, tubular hollow fiber membrane module and immersion type hollow fiber membrane module
WO2007040036A1 (en) * 2005-09-30 2007-04-12 Kureha Corporation Hollow fiber bamboo-blind-like article, process for producing hollow fiber bundle, tubular hollow fiber membrane module and immersion type hollow fiber membrane module
US7361274B2 (en) 2002-08-21 2008-04-22 Siemens Water Technologies Corp. Aeration method
WO2008143292A1 (en) * 2007-05-22 2008-11-27 Asahi Kasei Chemicals Corporation Hollow fiber membrane module, process for manufacturing the same, hollow fiber membrane module assembly and method of purifying suspended water with use thereof
US8070947B2 (en) 2005-01-31 2011-12-06 Toyo Boseki Kabushiki Kaisha Permselective membrane module and method for manufacturing the same
US8268176B2 (en) 2003-08-29 2012-09-18 Siemens Industry, Inc. Backwash
US8287743B2 (en) 2007-05-29 2012-10-16 Siemens Industry, Inc. Membrane cleaning with pulsed airlift pump
US8293098B2 (en) 2006-10-24 2012-10-23 Siemens Industry, Inc. Infiltration/inflow control for membrane bioreactor
US8318028B2 (en) 2007-04-02 2012-11-27 Siemens Industry, Inc. Infiltration/inflow control for membrane bioreactor
US8377305B2 (en) 2004-09-15 2013-02-19 Siemens Industry, Inc. Continuously variable aeration
US8382981B2 (en) 2008-07-24 2013-02-26 Siemens Industry, Inc. Frame system for membrane filtration modules
US8852438B2 (en) 1995-08-11 2014-10-07 Zenon Technology Partnership Membrane filtration module with adjustable header spacing
US8858796B2 (en) 2005-08-22 2014-10-14 Evoqua Water Technologies Llc Assembly for water filtration using a tube manifold to minimise backwash
US8956464B2 (en) 2009-06-11 2015-02-17 Evoqua Water Technologies Llc Method of cleaning membranes
US9022224B2 (en) 2010-09-24 2015-05-05 Evoqua Water Technologies Llc Fluid control manifold for membrane filtration system
US9533261B2 (en) 2012-06-28 2017-01-03 Evoqua Water Technologies Llc Potting method
US9604166B2 (en) 2011-09-30 2017-03-28 Evoqua Water Technologies Llc Manifold arrangement
US9675938B2 (en) 2005-04-29 2017-06-13 Evoqua Water Technologies Llc Chemical clean for membrane filter
US9764288B2 (en) 2007-04-04 2017-09-19 Evoqua Water Technologies Llc Membrane module protection
US9764289B2 (en) 2012-09-26 2017-09-19 Evoqua Water Technologies Llc Membrane securement device
US9815027B2 (en) 2012-09-27 2017-11-14 Evoqua Water Technologies Llc Gas scouring apparatus for immersed membranes
US9914097B2 (en) 2010-04-30 2018-03-13 Evoqua Water Technologies Llc Fluid flow distribution device
US9925499B2 (en) 2011-09-30 2018-03-27 Evoqua Water Technologies Llc Isolation valve with seal for end cap of a filtration system
US9962865B2 (en) 2012-09-26 2018-05-08 Evoqua Water Technologies Llc Membrane potting methods
US10322375B2 (en) 2015-07-14 2019-06-18 Evoqua Water Technologies Llc Aeration device for filtration system
US10427102B2 (en) 2013-10-02 2019-10-01 Evoqua Water Technologies Llc Method and device for repairing a membrane filtration module

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61167407A (en) * 1985-01-19 1986-07-29 Sumitomo Bakelite Co Ltd Preparation of hollow yarn filtration membrane module

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
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Publication number Priority date Publication date Assignee Title
US8852438B2 (en) 1995-08-11 2014-10-07 Zenon Technology Partnership Membrane filtration module with adjustable header spacing
US8075776B2 (en) 1995-08-11 2011-12-13 Zenon Technology Partnership Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes
US7708888B2 (en) 1995-08-11 2010-05-04 Zenon Technology Partnership Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes
US6964741B2 (en) 1995-08-11 2005-11-15 Zenon Environmental Inc. Apparatus for withdrawing permeate using an immersed vertical skein of hollow fiber membranes
US7022231B2 (en) 1995-08-11 2006-04-04 Zenon Environmental Inc. Apparatus incorporating potted hollow fiber membranes
US7063788B2 (en) 1995-08-11 2006-06-20 Zenon Environmental Inc. Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes
US7087173B2 (en) 1995-08-11 2006-08-08 Zenon Environmental Inc. Inverted cavity aerator for membrane module
USRE39294E1 (en) 1995-08-11 2006-09-19 Zenon Environmental Inc. Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate
USRE42669E1 (en) 1995-08-11 2011-09-06 Zenon Technology Partnership Vertical cylindrical skein of hollow fiber membranes and method of maintaining clean fiber surfaces
US7615157B2 (en) 1995-08-11 2009-11-10 Zenon Technology Partnership Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes
US7534353B2 (en) 1995-08-11 2009-05-19 Zenon Technology Partnership Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes
EP0952885A4 (en) * 1996-12-20 2001-04-04 Usf Filtration & Separations Scouring method
EP1736234A3 (en) * 1996-12-20 2007-06-13 Siemens Water Technologies Corp. Method for scouring fouled membranes
EP1115474A4 (en) * 1998-09-25 2005-03-30 Us Filter Wastewater Group Inc Apparatus and method for cleaning membrane filtration modules
JP2002525197A (en) * 1998-09-25 2002-08-13 ユー・エス・フィルター・ウェイストウォーター・グループ・インコーポレイテッド Cleaning device and cleaning method for filtration membrane module
US7361274B2 (en) 2002-08-21 2008-04-22 Siemens Water Technologies Corp. Aeration method
US8268176B2 (en) 2003-08-29 2012-09-18 Siemens Industry, Inc. Backwash
US8377305B2 (en) 2004-09-15 2013-02-19 Siemens Industry, Inc. Continuously variable aeration
US8070947B2 (en) 2005-01-31 2011-12-06 Toyo Boseki Kabushiki Kaisha Permselective membrane module and method for manufacturing the same
US9675938B2 (en) 2005-04-29 2017-06-13 Evoqua Water Technologies Llc Chemical clean for membrane filter
US8858796B2 (en) 2005-08-22 2014-10-14 Evoqua Water Technologies Llc Assembly for water filtration using a tube manifold to minimise backwash
US8894858B1 (en) 2005-08-22 2014-11-25 Evoqua Water Technologies Llc Method and assembly for water filtration using a tube manifold to minimize backwash
JPWO2007040035A1 (en) * 2005-09-30 2009-04-16 株式会社クレハ Hollow fiber bundle, method for producing hollow fiber bundle, cylindrical hollow fiber membrane module, and immersion hollow fiber membrane module
WO2007040036A1 (en) * 2005-09-30 2007-04-12 Kureha Corporation Hollow fiber bamboo-blind-like article, process for producing hollow fiber bundle, tubular hollow fiber membrane module and immersion type hollow fiber membrane module
WO2007040035A1 (en) * 2005-09-30 2007-04-12 Kureha Corporation Hollow fiber bundle, process for producing hollow fiber bundle, tubular hollow fiber membrane module and immersion type hollow fiber membrane module
US8293098B2 (en) 2006-10-24 2012-10-23 Siemens Industry, Inc. Infiltration/inflow control for membrane bioreactor
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