JPH09117647A - Operation of air diffusion device - Google Patents

Operation of air diffusion device

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Publication number
JPH09117647A
JPH09117647A JP27460695A JP27460695A JPH09117647A JP H09117647 A JPH09117647 A JP H09117647A JP 27460695 A JP27460695 A JP 27460695A JP 27460695 A JP27460695 A JP 27460695A JP H09117647 A JPH09117647 A JP H09117647A
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Prior art keywords
air
liquid
membrane cartridge
aeration
operation
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Pending
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JP27460695A
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Japanese (ja)
Inventor
Seiji Izumi
Masaharu Nurishi
Yutaka Yamada
清司 和泉
雅治 塗師
山田  豊
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Kubota Corp
株式会社クボタ
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    • 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
    • Y02W10/15Aerobic processes

Abstract

PROBLEM TO BE SOLVED: To prevent an air diffusion hole from being clogged when operating an air diffusion device arranged below a submerged membrane cartridge. SOLUTION: This air diffusion device supplies the required quantity of an air for the aeration treatment of a liquid to be treated and also the quantity of an air for generating the adequate speed of the ascending current of a mixture of air and liquid for cleaning the membrane surface of a membrane cartridge 2 and an adequate air ejection speed for preventing the clogging of an air diffusion hole 5a from occurring at the time of an operation to filter the membrane cartridge. When stopping the operation to filter the membrane cartridge 2, at least, the adequate quantity of an aeration air for preventing the clogging of the air diffusion hole 5a from occurring is supplied. Even when stopping the operation to filter the membrane cartridge 2, the aeration process is not discontinued, so that the clogging of the air diffusion hole 5a is prevented from occurring.

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】本発明は散気装置の運転方法に関し、特に小型合併処理浄化槽などの生活排水処理設備や活性汚泥法を利用した産業排水処理設備において被処理液の濾過を行う浸漬型膜カートリッジの下方に配置される散気装置の運転方法に関する。 The present invention relates to relates to method of operating the air diffuser, immersion type which performs filtering of the liquid to be treated in industrial wastewater treatment facility in particular using domestic wastewater treatment facilities and activated sludge method, such as small combined treatment septic tank a method for the operation of the air diffuser arranged below the membrane cartridges.

【0002】 [0002]

【従来の技術】従来、小型合併処理浄化槽などの生活排水処理設備や活性汚泥法を利用した産業排水処理設備においては、たとえば図1および図2に示したような膜分離装置を被処理液中に浸漬して設置している。 Conventionally, small merger in industrial wastewater treatment facility using domestic wastewater treatment facilities and activated sludge method, such as treatment septic tank, for example, the liquid to be treated in the membrane separation apparatus shown in FIGS. 1 and 2 immersed in is installed on.

【0003】膜分離装置は、上下が開口した箱状の膜ケース1の内部に平板状の膜カートリッジ2を適当間隔で並列に配置し、同じく上下が開口した箱状の散気ケース3の内部に、槽外のブロワ4などの給気手段に連通した散気装置としての散気管5を配置し、膜ケース1と散気ケース3とを互いに上下に分離可能に配置することにより構成されている。 [0003] The membrane separation apparatus, the inside of the upper and lower are arranged in parallel at appropriate intervals a flat membrane cartridge 2 to the interior of the box-shaped membrane casing 1 having an opening, a box-shaped air diffuser case 3 also vertically opened to, to place the diffuser tube 5 as air diffuser in communication with the air supply means such as a blower 4 Sogai, it is constituted by detachably arranging the film casing 1 and the diffuser case 3 vertically together there.

【0004】膜カートリッジ2は、図2に示したように、濾板6の表面に有機濾過膜7,7を配置して濾板6 [0004] film cartridge 2, as shown in FIG. 2, filter plate by placing the organic filtration membrane 7, 7 on the surface of the filtration plate 6 6
と濾過膜7との間を透過水流路8とし、透過水流路8に連通する吸引チューブ9と集水管10を設けることにより構成されている。 And between the filtration membranes 7 and permeate passage 8 is constituted by providing the suction tube 9 and the water collecting pipe 10 which communicates with the permeate flow path 8. そして、集水管10に連通するように集水ヘッダ管や吸引ポンプなどの吸引手段手段(図示せず)が設けられている。 Then, the suction means means such as water collecting header tubes and the suction pump to communicate with the water collecting pipe 10 (not shown) is provided.

【0005】このような膜分離装置を濾過運転する際には、吸引手段によって集水管10,吸引チューブ9を通じて透過水流路8に吸引圧を負荷することにより、あるいは膜カートリッジ2より上方の被処理液の水頭を濾過駆動圧とすることにより、活性汚泥や微粒子などの懸濁物質11を濾過膜7で捕捉し、濾過膜7を透過して透過水流路8内に流入した透過水12を吸引チューブ9,集水管10を通じて処理槽の外部へ取り出している。 [0005] When the filtering operation of such a membrane separation device, water collecting pipe 10 by the suction means, by loading the suction pressure to the permeate flow path 8 through the suction tube 9, or the membrane cartridge 2 from above of the treatment by the water head of the liquid and the filtration driving pressure, the suspended solids 11, such as activated sludge and fine particles captured by the filter membrane 7, transmitted through the permeate 12 which has flowed into the permeate flow passage 8 suction filtration membrane 7 tube 9, is taken out to the outside of the treatment vessel through the water collecting pipes 10.

【0006】このとき、ブロワ4より散気管5の散気孔5aを通じて被処理液に曝気空気を供給するとともに、 [0006] with this time, to supply aeration air into the liquid to be treated through the diffusing pores 5a of the trachea 5 diffusing from the blower 4,
曝気空気の気泡13によって生起される気液混合上昇流14により膜カートリッジ2の膜面全体を均一に擦洗して、濾過膜7の表面にケーキ層が堆積するのを防止している。 Film surface entire membrane cartridge 2 by the gas-liquid mixed upward flow 14 that is caused by the bubbles 13 of the aeration air was uniformly Kosuarai, thereby preventing the cake layer deposited on the surface of the filtration membrane 7.

【0007】 [0007]

【発明が解決しようとする課題】上記したように、膜分離装置に配置される散気管は、被処理液に対して曝気空気を供給するものであり、特に活性汚泥処理の場合は曝気空気中の酸素を微生物に供給することを主たる目的としている。 As described above [0008], membrane diffusing pipe disposed in the separation device is configured to supply the aeration air to the liquid to be treated, in particular aeration air in the case of activated sludge treatment as main purpose of the oxygen supplied to the microorganisms. このため、処理槽への被処理液の流入が少ない場合などは曝気を低減または停止するようにしており、その他の場合でも、曝気動力の節減を図るために曝気を停止することがある。 Thus, for example, if the inflow of the liquid to be treated into the treatment tank is small is to reduce or stop the aeration, even otherwise, may stop the aeration in order to reduce the aeration power.

【0008】しかるに、このような散気管においては、 [0008] However, in such an aeration tube is,
連続して空気が噴き出される時には散気孔の閉塞が防止されるが、曝気が低減または停止された時には被処理液中の活性汚泥や微粒子が管内に逆流して散気孔が閉塞しやすくなる。 While blockage of the diffuser pores is prevented when continuously air expelled, pores dispersed flows back to the active sludge and particulates tube in the liquid to be treated is easily closed when the aeration is reduced or stopped. 一部の散気孔が閉塞すると、給気手段より散気管内に供給された空気は閉塞していない散気孔から噴き出すことになり、曝気空気の気泡やそれにより生起される気液混合上昇流の流れに偏りが生じ、その結果、 When a part of the diffusing pores are closed, the air supplied into the diffusing pipe from the supply means results in spewing from diffusing pores unobstructed, the aeration air bubbles or the gas-liquid mixture upflow thereby is caused deviation occurs in the flow, and as a result,
流れが供給されない位置の膜カートリッジの膜面には活性汚泥などが堆積し、膜間閉塞が生じることにもなる。 The film surface of the membrane cartridge of the position where the flow is not supplied activated sludge is deposited, also in the film between the blockage.

【0009】このため、散気孔の閉塞を防止するための様々な工夫がなされているが満足できる手段はまだなく、閉塞した散気孔を回復させるためには、散気管を下部に配設した膜分離装置全体を処理槽から取り出さねばならず、非常に手間暇がかかっているのが現状である。 [0009] Therefore, aeration is still no means satisfactory although various devices have been made in order to prevent clogging of the pores, in order to restore the occluded dispersed pores were provided with diffuser tubes in the lower layer without must remove the entire separation device from the processing tank, at present, it is very time and effort it takes.

【0010】本発明は上記課題を解決するもので、散気孔の閉塞が生じにくい散気装置の運転方法を提供することを目的とするものである。 [0010] The present invention is intended to solve the above problems, it is an object to provide a method of operating a distributed pores clogging hardly occurs diffuser of.

【0011】 [0011]

【課題を解決するための手段】上記課題を解決するために、本発明の散気装置の運転方法は、被処理液の濾過を行う浸漬型膜カートリッジの下方に配置され、被処理液に曝気空気を供給する散気装置の運転方法であって、膜カートリッジの濾過運転時には、被処理液の処理に必要な空気量と、膜カートリッジの膜面洗浄に必要な気液混合上昇流速度と、散気孔の閉塞が生じない空気噴出速度とを与える量の曝気空気を供給し、膜カートリッジの濾過運転停止時には、少なくとも散気孔の閉塞が生じない空気噴出速度を与える量の曝気空気を供給するようにしたものである。 In order to solve the above problems SUMMARY OF THE INVENTION, operating method of the air diffuser of the present invention is placed below the submerged membrane cartridge that performs filtration of the liquid to be treated, aerated liquid to be treated a method of operating a diffuser for supplying air, at the time of filtration of the membrane cartridge, the amount of air required to process the liquid to be treated, the gas-liquid mixture rising flow velocity required membrane surface cleaning of the membrane cartridge, supplying aeration air amount to provide dispersion and an air blowing speed of clogging does not occur in the pores, the filtration operation is stopped for film cartridges, to supply aeration air amount to provide air ejection speed occlusion of at least diffusing pores does not occur it is obtained by the.

【0012】ここで、被処理液の処理に必要な空気量とは、活性汚泥処理の場合は、少なくとも活性汚泥混合液を攪拌混合して活性汚泥に必要な酸素を供給できる空気量を意味し、その他の場合は、少なくとも被処理液を攪拌混合して被処理液中の気体を大気中に放出させるなどの周知の処理に必要な空気量を意味する。 [0012] Here, the amount of air required for the processing of the liquid to be treated, activated when the sludge treatment means an amount of air can supply oxygen necessary for the activated sludge stirring and mixing at least activated sludge mixture , otherwise, it means an amount of air required to known processes such as the release of gas in at least the liquid to be treated and mixed by stirring with the liquid to be treated in the atmosphere.

【0013】上記した運転方法によれば、膜カートリッジの濾過運転時と濾過運転停止時とにおいて、散気装置が停止されることなく曝気空気量が変更されることで、 According to the operation method described above, in the filtration operation of the membrane cartridge and filtration operation is stopped, by aeration amount of air without an air diffuser is stopped is changed,
濾過運転停止時における散気孔の閉塞が防止される。 Occlusion of the pores distributed in the filtration operation is stopped is prevented.

【0014】 [0014]

【発明の実施の形態】以下、本発明の実施形態を説明する。 BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention. 本発明の散気装置の運転方法は、図1と図2を用いて説明した膜分離装置などにおいて実施されるので、図示および詳細な説明を省略し、図1と図2に示した符号を引用して説明する。 Method of operating the air diffuser of the present invention, because it is carried out in such a membrane separation apparatus described with reference to FIGS. 1 and 2, not shown and detailed description, the reference numerals shown in FIGS. 1 and 2 cited it will be described.

【0015】膜分離装置は、活性汚泥処理槽の内部に設置されて活性汚泥等の微粒子を分離するものであり、膜ケース1の内部に膜カートリッジ2を配列し、膜ケース1の下方に配置した散気ケース3の内部に、ブロワ4などの給気手段に連通した散気装置としての散気管5を配設している。 The membrane separation unit is installed inside the bioreactor tank and is intended to separate fine particles such as activated sludge, the film cartridge 2 is arranged in the interior of the film casing 1, disposed below the membrane chassis 1 inside the diffuser casing 3 that has been disposed diffusing pipe 5 as air diffuser in communication with the air supply means such as a blower 4. 膜カートリッジ2は、活性汚泥等の微粒子を分離するのに適した孔径1μ以下の精密濾過膜7を備えており、膜ケース1の内部に50〜150枚を1セットとして配列されている。 Film cartridge 2 is provided with a microfiltration membrane 7 pore diameter 1μ following suitable for separating fine particles such as activated sludge, it is arranged 50 to 150 sheets in the interior of the film casing 1 as one set. 散気管5は、1セットの膜カートリッジ3に対応するものであって、十〜数十の散気孔5aを有している。 Diffusing pipe 5, which corresponds to a set of membrane cartridge 3, and a diffusing pores 5a of ten to several tens.

【0016】以下、散気装置の運転方法を説明する。 [0016] The following describes the method of operating the air diffuser. 活性汚泥処理槽の内部において、被処理液を活性汚泥処理しつつ、膜カートリッジ2を濾過運転して活性汚泥等の微粒子を分離する。 Inside the bioreactor tank, while activated sludge treatment liquid to be treated to separate the fine particles such as activated sludge membrane cartridge 2 by filtration operation.

【0017】その際には、ブロワ4を運転して散気管5 [0017] In that case, the trachea 5 diffusing driving a blower 4
より、槽内の活性汚泥混合液を攪拌混合して活性汚泥に必要な酸素を供給できる空気量を与え、かつ、膜カートリッジ2の膜面洗浄に必要な気液混合上昇流速度を与え、かつ、散気孔5aの閉塞が生じない空気噴出速度を与える量の曝気空気を供給する。 More gives the amount of air activated sludge mixture capable of supplying oxygen necessary for the activated sludge and mixing and stirring in the tank, and provide a gas-liquid mixed upward flow speed required membrane surface cleaning of the membrane cartridge 2, and supplies aeration air amount to provide air ejection speed of clogging does not occur in the aeration pore 5a.

【0018】そして、活性汚泥処理槽への被処理液の流入が少なくなったら、膜カートリッジ2の濾過運転を停止する。 [0018] Then, when the inflow of the liquid to be treated to the bioreactor tank is low, to stop the filtration operation of the membrane cartridge 2. その際には、ブロワ4の運転を調節して散気管5より、少なくとも散気孔5aの閉塞が生じない空気噴出速度を与え、必要に応じてさらに、槽内の活性汚泥混合液を攪拌混合して活性汚泥に必要な酸素を供給できる量の曝気空気を供給する。 At that time, from the trachea 5 diffusing to adjust the operation of the blower 4, giving an air ejection speed of closure of at least diffusing pores 5a does not occur, further optionally, stirred and mixed activated sludge mixture in the tank supplying aeration air quantity which can supply the oxygen necessary for activated sludge Te.

【0019】上記したような運転方法によれば、膜カートリッジ2の濾過運転停止時においても、散気装置が停止されることなく必要量の曝気空気が供給され、散気孔5aの閉塞が防止される。 According to the driving method as described above, even when the filtration operation is stopped for film cartridges 2 are supplied the desired amount of aeration air without air diffuser is stopped, clogging of the diffusing pores 5a is prevented that.

【0020】曝気空気量の変更は、ブロワ4などの給気手段の運転台数を変更してもよいし、あるいは1台の給気手段を使用してインバータ等で流量を変更してもよい。 The aeration air quantity changes, may change the number of operating air supply means such as a blower 4, or may be changed flow in the inverter or the like using a single air supply means. 濾過運転時と濾過運転停止時の曝気空気量の比は、 The ratio of the filtration operation when the filtration operation is stopped when the aeration air quantity,
活性汚泥を構成する微生物に必要な酸素量等に関連するので一意的に決定できないが、通常、濾過運転時2に対して濾過運転停止時1以下となる。 Can not be uniquely determined as it relates to microorganisms oxygen necessary for constituting the active sludge, usually, the filtration operation is stopped when 1 or less with respect to the filtration operation at 2. 最小の曝気空気量は、散気孔の閉塞を防止するためには空気噴出速度を3 Minimum aeration air amount, the air ejection speed in order to prevent the clogging of the diffuser pores 3
m/秒未満にできないという観点より決定される。 Is determined from the viewpoint of not be less than m / sec. 濾過運転時の曝気空気量は、膜面洗浄のための気液混合上昇流速度を0.5m/秒以上とする曝気空気量を一因子として決定される。 Aeration air quantity during filtration operation is determined aeration amount of air a gas-liquid mixed upward flow speed is 0.5 m / sec or more for the membrane surface washing as one factor.

【0021】たとえば、200人の生活排水を処理する処理槽を設置した生活排水処理設備では、処理槽の内部に150枚の膜カートリッジを設置し、散気装置を、濾過運転時の曝気空気量を2.0m 3 /分とし、濾過運転停止時の曝気空気量を0.75m 3 /分として運転するようにしている。 [0021] For example, in the two hundred domestic wastewater processing a processing tank installation was domestic wastewater treatment facility, the 150 sheets of the membrane cartridge into the processing tank is installed, the air diffuser, the aeration air quantity during filtration operation it a 2.0 m 3 / min, so that to operate the aeration air quantity during filtration operation is stopped as 0.75 m 3 / min.

【0022】なお、上記においては、活性汚泥処理について説明したが、その他の場合でも、曝気空気によって被処理液を攪拌混合し、被処理液中の気体を大気中に放出させるなどの処理を行なっている場合は、そのような処理に必要な空気量を供給すればよい。 [0022] In the above, it has been described activated sludge treatment, even if the other liquid to be treated are mixed and stirred by aeration air, performs processing such as to release the gas in the liquid to be treated into the atmosphere If it is, it is only necessary to supply the amount of air necessary for such processing.

【0023】 [0023]

【発明の効果】以上のように、本発明によれば、浸漬型膜カートリッジの下方に配置した散気装置を運転するに際し、膜カートリッジの濾過運転時と濾過運転停止時とにおいて、散気装置を停止することなく曝気空気量を変更するようにしたので、濾過運転停止時においても散気孔の閉塞を防止できる。 As is evident from the foregoing description, according to the present invention, upon operating the air diffuser arranged below the immersion type membrane cartridge in the filtration operation of the membrane cartridge and filtration operation is stopped, the air diffuser since to change the aeration air quantity without stopping, and can prevent clogging of even diffusing pores during filtration operation is stopped.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の散気装置の運転方法が実施される従来の膜分離装置の全体構成を示した説明図である。 1 is an explanatory diagram method of operating an air diffuser apparatus showing the overall structure of a conventional membrane separation apparatus of the invention is implemented.

【図2】図1に示した膜分離装置の一部を構成する膜カートリッジを示した説明図である。 FIG. 2 is an explanatory view showing a film cartridge which constitutes a part of a membrane separation apparatus shown in FIG.

【符号の説明】 DESCRIPTION OF SYMBOLS

2 浸漬型膜カートリッジ 4 ブロワ 5 散気管 5a 散気孔 2 submerged membrane cartridge 4 blower 5 diffuser tubes 5a diffusing pores

Claims (1)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 被処理液の濾過を行う浸漬型膜カートリッジの下方に配置され、被処理液に曝気空気を供給する散気装置の運転方法であって、膜カートリッジの濾過運転時には、被処理液の処理に必要な空気量と、膜カートリッジの膜面洗浄に必要な気液混合上昇流速度と、散気孔の閉塞が生じない空気噴出速度とを与える量の曝気空気を供給し、膜カートリッジの濾過運転停止時には、少なくとも散気孔の閉塞が生じない空気噴出速度を与える量の曝気空気を供給することを特徴とする散気装置の運転方法。 1. A disposed below the immersion type membrane cartridge that performs filtration of the liquid to be treated, method of operating a diffuser for supplying aeration air into the liquid to be treated, during filtration operation of the membrane cartridge is to be treated and air quantity required to process the liquid, the membrane surface gas-liquid mixture upflow speed required for cleaning the membrane cartridge, the dispersion amount of aeration air to provide occluding the air ejection speed which does not cause the pores to feed, the membrane cartridge during the filtration operation is stopped, the method operation of an air diffuser apparatus characterized by supplying the amount of aeration air to provide the air ejection speed occlusion of at least diffusing pores does not occur.
JP27460695A 1995-10-24 1995-10-24 Operation of air diffusion device Pending JPH09117647A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6511602B1 (en) 1997-12-05 2003-01-28 Mitsubishi Rayon Co., Ltd. Apparatus and method for treating water
WO2008144826A1 (en) * 2007-05-29 2008-12-04 Siemens Water Technologies Corp. Membrane cleaning using an airlift pump
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
US8840783B2 (en) 2007-05-29 2014-09-23 Evoqua Water Technologies Llc Water treatment membrane cleaning with pulsed airlift pump
US9764289B2 (en) 2012-09-26 2017-09-19 Evoqua Water Technologies Llc Membrane securement device
US9764288B2 (en) 2007-04-04 2017-09-19 Evoqua Water Technologies Llc Membrane module protection
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

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6511602B1 (en) 1997-12-05 2003-01-28 Mitsubishi Rayon Co., Ltd. Apparatus and method for treating water
US8377305B2 (en) 2004-09-15 2013-02-19 Siemens Industry, Inc. Continuously variable aeration
US9764288B2 (en) 2007-04-04 2017-09-19 Evoqua Water Technologies Llc Membrane module protection
WO2008144826A1 (en) * 2007-05-29 2008-12-04 Siemens Water Technologies Corp. Membrane cleaning using an airlift pump
EP2152393A1 (en) * 2007-05-29 2010-02-17 Siemens Water Technologies Corp. Membrane cleaning using an airlift pump
EP2152393A4 (en) * 2007-05-29 2012-07-25 Siemens Industry Inc Membrane cleaning using an airlift pump
US8840783B2 (en) 2007-05-29 2014-09-23 Evoqua Water Technologies Llc Water treatment membrane cleaning with pulsed airlift pump
US8382981B2 (en) 2008-07-24 2013-02-26 Siemens Industry, Inc. Frame system for membrane filtration modules
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
US9764289B2 (en) 2012-09-26 2017-09-19 Evoqua Water Technologies Llc Membrane securement device
US9962865B2 (en) 2012-09-26 2018-05-08 Evoqua Water Technologies Llc Membrane potting methods
US9815027B2 (en) 2012-09-27 2017-11-14 Evoqua Water Technologies Llc Gas scouring apparatus for immersed membranes

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