WO2009118789A1 - 膜エレメントおよび膜モジュール - Google Patents
膜エレメントおよび膜モジュール Download PDFInfo
- Publication number
- WO2009118789A1 WO2009118789A1 PCT/JP2008/000757 JP2008000757W WO2009118789A1 WO 2009118789 A1 WO2009118789 A1 WO 2009118789A1 JP 2008000757 W JP2008000757 W JP 2008000757W WO 2009118789 A1 WO2009118789 A1 WO 2009118789A1
- Authority
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- WIPO (PCT)
- Prior art keywords
- membrane
- filtration
- filtration membrane
- liquid
- support
- Prior art date
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- 239000012528 membrane Substances 0.000 title claims abstract description 272
- 238000001914 filtration Methods 0.000 claims abstract description 106
- 239000007788 liquid Substances 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 44
- 239000003566 sealing material Substances 0.000 claims description 18
- 238000011144 upstream manufacturing Methods 0.000 claims description 10
- 239000000126 substance Substances 0.000 abstract description 17
- 238000011001 backwashing Methods 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 239000012466 permeate Substances 0.000 description 22
- 238000004140 cleaning Methods 0.000 description 17
- 238000005273 aeration Methods 0.000 description 13
- 238000000926 separation method Methods 0.000 description 10
- 239000011347 resin Substances 0.000 description 9
- 229920005989 resin Polymers 0.000 description 9
- 239000000243 solution Substances 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000010802 sludge Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000967 suction filtration Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000007654 immersion Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/06—Flat membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/18—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/08—Flat membrane modules
- B01D63/081—Manufacturing thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/08—Flat membrane modules
- B01D63/082—Flat membrane modules comprising a stack of flat membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/003—Membrane bonding or sealing
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
- C02F3/1273—Submerged membrane bioreactors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/04—Specific sealing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/04—Specific sealing means
- B01D2313/042—Adhesives or glues
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2315/00—Details relating to the membrane module operation
- B01D2315/06—Submerged-type; Immersion type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2317/00—Membrane module arrangements within a plant or an apparatus
- B01D2317/02—Elements in series
- B01D2317/022—Reject series
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
-
- 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
Definitions
- the present invention relates to a membrane element and a membrane module used for filtration or concentration in general water treatment such as clean water and wastewater.
- an immersion type membrane device in which a plurality of membrane elements are arranged in parallel at appropriate intervals is known.
- the membrane element include those shown in FIGS. 9 to 10, the membrane element has a filter plate 2 made of an organic membrane covering a surface of a rectangular flat filter plate 1 that is a membrane support, and the filter membrane 2 is disposed at the peripheral portion thereof.
- the filter plate 1 is joined, and the filter plate 1 has a water collection port 3.
- the resin filter plate 1 is illustrated as the membrane support, but a flexible material such as a nonwoven fabric or a net may be used as the membrane support.
- the membrane element receives the driving pressure and filters the water to be treated by the filtration membrane 2.
- the membrane element performs gravity filtration using the head pressure in the tank as the driving pressure, or applies a negative pressure as the driving pressure to the inside of the filtration membrane 2. Used for suction filtration.
- the joining method of the filter plate 1 and the filtration membrane 2 with such a membrane element includes, for example, welding and adhesion.
- welding the resin of the filter plate 1 is melted by using ultrasonic waves to form the welded portion 4, and the filter plate 1 and the filtration membrane 2 are joined at the welded portion 4.
- Adhesion joins the filter plate 1 and the filter membrane 2 using an adhesive.
- Japanese Patent Publication Japanese Patent Laid-Open No. 11-33370 describes that two flat films are laminated via a spacer, and both end portions are welded or bonded to both sides of the two flat films. Thus, a filtration membrane body is formed.
- Patent No. 3815645 is a bonding member in which a separator unit is attached to both sides of a member having a water flow function through a spacer and a membrane end is joined. A hollow part is formed.
- the membrane separation device when using the above-mentioned membrane separation device, the membrane separation device is immersed in the activated sludge mixed liquid in the aeration tank, and aeration air is ejected from the aeration device. In this state, a driving pressure is applied to the membrane element to filter the activated sludge mixed solution, and the permeated solution that has permeated the filtration membrane is led out of the tank as treated water.
- This chemical solution cleaning is performed by supplying the chemical solution from the water collection port 3 to the permeate flow path between the filter plate 1 and the filtration membrane 2.
- the filtration membrane 2 expands outward and exerts a peeling action on the joint between the filter plate 1 and the filtration membrane 2.
- the present invention solves the above-described problems, and even when aeration is performed while the filtration operation is stopped, or even when a high internal pressure is applied in chemical cleaning, a membrane element that does not easily break or peel off the filtration membrane and An object is to provide a membrane module.
- the membrane element of the present invention is arranged so as to cover the main surface of the membrane support, which is arranged along the flow direction of the liquid to be treated, and the front and back surfaces of the membrane support.
- a filtration membrane made of a flat membrane having a looped shape including an inverted portion including the upstream and downstream ends, and a filtration membrane on both sides of the membrane support along the flow direction of the liquid to be treated. It consists of the sealing material formed watertight on the edge part.
- the filtration membrane has at least one junction, and the junction is arranged by overlapping the ends of the filtration membrane on the main surface or the end surface of the membrane support, It is characterized in that the back surface at the other end is bonded to the surface at one end.
- the other end portion facing the downstream side among the end portions of the filtration membrane overlapping at the joint portion is arranged outside.
- the membrane module of the present invention includes at least one membrane element and at least one water collecting case, and the membrane element is disposed along the flow direction of the liquid to be treated, and the main and front sides of the membrane support
- a filtration membrane made of a flat membrane having a loop shape with an inverted portion including the upstream and downstream ends of the membrane support, and covering the surface in the flow direction of the liquid to be treated
- a sealing material formed in a watertight manner on the edge of the filtration membrane on both sides of the membrane support along, the water collection case has an opening communicating with the internal water collection space, and the opening The side of the inserted membrane element is kept watertight.
- the present invention forms the sealing material on the edge of the filtration membrane on both sides of the membrane support along the flow direction of the liquid to be treated in a watertight manner. Since the opening edge is held on the membrane support, there is no portion for directly fixing the filtration membrane and the membrane support. It is not always necessary for the sealing material to strongly press the filtration membrane against the filter plate. However, the membrane element directly connects the filter plate and the filtration membrane in the region where the membrane surface of the filtration membrane does not come into contact with the liquid to be treated, such as the region corresponding to the sealing material or the region located inside the water collection case. It is also possible to join them. However, the condition is that the joining does not disturb the permeate channel.
- the filtration membrane may be formed in a loop shape by joining the end portions of one or a plurality of membrane sheets, or may be formed by a membrane sheet that forms a seamless loop shape.
- the sealing material is formed watertight on the filtration membrane, so even if the filtration membrane bulges outward due to internal pressure, Strength can be secured.
- the permeate between the membrane support and the filtration membrane is pushed downstream of the flow of the liquid to be treated and gathers in the reversal section, and is filtered.
- the membrane swells flexibly at the reversal part to allow the permeate to move. Furthermore, since the bulge of the reversal part occurs in the downstream region of the downstream end of the membrane support, the bulge of the reversal part does not become a resistance to the flow of the liquid to be processed flowing along the membrane support, and the inversion Vibration and stress do not occur in the filtration membrane due to the swelling of the part.
- the load acting on the filtration membrane can be suppressed and the filtration membrane can be prevented from breaking.
- positioned outside faces the downstream and does not oppose the flow of a to-be-processed liquid, the peeling of a filtration membrane junction part can be suppressed.
- the perspective view which shows the membrane cassette in embodiment of this invention Sectional drawing which shows the principal part in the membrane module of the membrane cassette
- the perspective view which shows the membrane element in embodiment of this invention Front view showing the membrane element
- the perspective view which shows the membrane element in other embodiment of this invention The perspective view which shows the membrane element in Embodiment 3 of this invention
- Schematic diagram showing the action of the membrane element of the present invention Schematic diagram showing the action of a conventional membrane element
- An exploded perspective view showing a configuration of a conventional membrane element A perspective view showing a conventional membrane element Side view showing a conventional membrane element Side view showing a conventional membrane element
- a membrane cassette 11 constituting a membrane separation apparatus is composed of a plurality of membrane modules 12 stacked one above the other, and is immersed in a liquid to be treated in a treatment tank (not shown).
- a treatment tank not shown
- an air diffuser 11 a is arranged at a position below the lower membrane module 12.
- the membrane module 12 has a plurality of membrane elements 13 arranged in parallel at a predetermined interval, and both lateral sides of each membrane element 13 are sealed in a water collecting case 14 in a watertight manner. A flow path is formed.
- Each water collecting case 14 is hollow and has a water collecting space inside, and forms a rectangular box.
- the shape of the water collecting case 14 may be other than a rectangular shape.
- the water collecting case 14 can be provided only on one side of the membrane element 13. In this case, the other side portion of the membrane element 13 is sealed with a resin or the like to be described later.
- the membrane element 13 is arranged in the vertical direction.
- the arrangement direction of the membrane element 13 is not limited to the vertical direction, and any arrangement is possible as long as it is arranged along the flow direction of the liquid to be processed. Therefore, as will be described later, it can be arranged in the horizontal direction or can be arranged obliquely.
- the membrane module 12 has an upper connecting portion 23 provided on the upper end surface of the water collecting case 14 and a lower connecting portion 24 provided on the lower end surface, and the upper connecting portion 23 and the lower connecting portion 24 form a flow path to collect. It communicates with the water collection space of the water case 14.
- the lower connecting portion 24 of the upper membrane module 12 and the upper connecting portion 23 of the lower membrane module 12 are connected, and the upper connecting portion 23 of the water collecting case 14 of the upper membrane module 12 is collected via the tube 25. It communicates with the water pipe 26.
- the lower connecting portion 24 of the lower membrane module 12 communicates with the water collecting pipe 26 via the tube 25, and further, the lower connecting portion 24 or the upper connecting portion 23 does not directly pass through the tube 25. It is also possible to communicate with the water collecting pipe 26.
- the lower connecting portion 24 of the lower membrane module 12 is closed by a plug (not shown), but it is also possible to use a lower membrane module 12 that does not have the lower connecting portion 24. is there.
- the permeate may be taken out from at least one of the left and right upper connecting portions 23 of the upper membrane module 12 and the left and right lower connecting portions 24 of the lower membrane module 12.
- each water collecting case 14 holds a plurality of membrane elements 13 in a watertight manner via a sealing material (resin or the like) 16 potted in the opening 15.
- a sealing material 16 such as a resin is potted in the slit.
- a sealing material such as rubber can be disposed around the membrane element 13.
- the membrane element 13 is a filtration membrane comprising a resin filter plate 17 that forms a membrane support, and a flat membrane (organic membrane) that is disposed so as to cover the main surfaces of the front and back surfaces of the filter plate 17. 18, and each membrane element 13 communicates with the water collection space of the water collection case 14 through a permeate passage formed between the front and back main surfaces of the filter plate 17 and the filtration membrane 18.
- the resin filter plate 1 is exemplified as the membrane support, but a flexible material such as a nonwoven fabric or a net may be used as the membrane support.
- the upper end side of the membrane element 13 is positioned downstream in the flow direction of the liquid to be processed, and the lower end side thereof is positioned upstream in the flow direction of the liquid to be processed.
- the filtration membrane 18 has a downstream inversion portion 20 that is folded back including the downstream end portion 19 of the filter plate 17 and an upstream inversion portion 29 that is folded back including the upstream end portion 27.
- the end parts of the filter membrane 18 are overlapped with each other on the main surface or the end face of the filter plate 17, the back face at the other end part is joined to the surface at the one end part, and the other facing toward the downstream side
- the joint part 30 is formed by positioning the end of the outer part on the outside.
- the joint portion 30 is formed by welding with ultrasonic waves or adhesion with an adhesive.
- the membrane elements 13 having this structure are arranged in parallel at a predetermined interval, and a plurality of membrane elements 13 are sealed in a watertight manner to the opening 15 of the water collection case 14 with a sealing material (resin or the like) 16 arranged between them. .
- the membrane element 13 has a structure in which the filter plate 17 and the filtration membrane 18 are not directly fixed and joined, and the filtration membrane 18 and the filter plate 17 are not directly fixed on the four sides of the filter plate 17 by adhesion or welding.
- the structure is realized.
- the membrane element 13 it is also possible to join the filtration membrane 18 directly. However, the condition is that the joining does not disturb the permeate channel.
- the sealing material 16 can be formed for each individual membrane element 13, and on each side of the filter plate 17 along the flow direction of the liquid to be treated for each membrane element 13.
- the edge of the filtration membrane 18 is held by the sealing material 16.
- the membrane elements 13 having this structure can be arranged in parallel at a predetermined interval, and a plurality of membrane elements 13 can be bound by a sealing material (resin or the like) 16 arranged between them.
- a sealing material such as a rubber material can be disposed on the filtration membrane 18 to join the filtration membrane 18 to the filter plate 17.
- the loop-shaped filtration membrane 18 is formed by one membrane sheet.
- the filtration membrane 18 may be formed in a loop shape with a plurality of membrane sheets.
- one of the two membrane sheets constituting the filtration membrane 18 forms a downstream inversion portion 20 that is folded back including the upper end edge 19 of the filter plate 17, and the other membrane sheet is on the upstream side.
- An upstream reversing portion 29 that includes the end 27 and is folded back is formed.
- the end portions of both membrane sheets are arranged on the main surface of the filter plate 17 so as to overlap each other, and the end portions of both membrane sheets are joined to form two joint portions 30.
- the joint portion 30 is formed by welding with ultrasonic waves or adhesion with an adhesive.
- the filtration membrane 18 can be formed of a membrane sheet having a seamless loop shape.
- the membrane module 12 of the present invention has the following effects.
- Normal operation Air is diffused as an aeration gas from the diffuser 11a arranged at the lower position of the lower membrane module 12, and an upward flow of gas-liquid mixed phase is generated inside the membrane cassette 11 by the air lift action of air bubbles. .
- the liquid to be processed in the treatment tank (not shown) is supplied between the membrane elements 13 to form a flow of the liquid to be treated along the membrane surface of the membrane element 13 and permeate the filtration membrane 18.
- the liquid to be treated is supplied in a cross flow with respect to the flow of permeate flowing in
- the membrane element 13 is arranged in the vertical direction.
- the membrane elements 13 can be arranged in a horizontal direction or an oblique direction.
- the activated sludge mixed liquid in the tank is gravity filtered by each membrane element 13 using the water head in the tank as the driving pressure.
- suction filtration is performed by applying a suction pressure as a driving pressure to each membrane module 12 of the membrane cassette 11 through the water collection pipe 26 and the tube 25 by a suction pump.
- the permeate that has permeated the filtration membrane 18 of the membrane element 13 under the driving pressure flows into the water collection space of the water collection case 14 through the permeate flow path between the filtration membrane 18 and the filter plate 17.
- the permeate flowing into the water collecting case 14 of the lower membrane module 12 passes through the upper connecting portion 23 and flows into the water collecting case 14 of the upper membrane module 12 from the lower connecting portion 24.
- the permeate flowing into the water collecting case 14 of the upper membrane module 12 is led out of the tank as treated water from the upper connecting portion 23 through the tube 25 and the water collecting pipe 26.
- the activated sludge mixed liquid is supplied by crossflow to the flow path between the membrane elements 13 by the upward flow, and the membrane surface of the membrane element 13 is aerated and washed by the upward flow.
- aeration cleaning a decrease in the separation function due to fouling is suppressed, and the membrane separation apparatus is prevented from malfunctioning.
- the end portion arranged on the outer side faces the downstream side and does not face the flow of the liquid to be treated, peeling of the filtration membrane joined portion can be suppressed.
- Aeration cleaning operation In the case of gravity filtration, a valve (not shown) provided in the water collecting pipe 26 is closed. In the case of suction filtration, the suction pump is stopped to stop the filtration operation. If the diffuser 11a is operated in this state to perform aeration cleaning, an excellent cleaning effect can be obtained.
- the upward flow pushes the permeate inside each membrane element 13 to the upper downstream side between the filter plate 17 and the filtration membrane 18.
- the filtration membrane 18 has an inverted portion 20 that is folded back including the downstream end portion 19 of the filter plate 17, so that the filter membrane 18 and the filtration membrane 18 are located upstream and downstream.
- the pushed permeate collects in the reversing unit 20 and the filtration membrane 18 swells flexibly in the reversing unit 20 to allow the permeate to move.
- the bulge 20a of the reversing part 20 is formed in the downstream region of the end 19 on the downstream side of the filter plate 17, the bulge 20a of the reversing part 20 does not become a resistance to the upward flow flowing along the filter plate 17, Vibration and stress are not generated in the filtration membrane 18 due to the bulge 20a of the reversing unit 20.
- the reversing part 20 swells flexibly and allows the permeate to move, and the swell 20a does not become a resistance against the upward flow, thereby suppressing the load acting on the filtration membrane 18 and breaking the filtration membrane 18.
- Chemical liquid cleaning At the time of chemical liquid cleaning, the chemical liquid is supplied to each membrane module 12 of the membrane cassette 11 through the water collection pipe 26 and the tube 25, and the chemical liquid is supplied to the permeate flow path between the filter plate 17 and the filtration membrane 18 at a predetermined pressure. . At this time, the filtration membrane 18 receives the internal pressure and swells outward. In this state, the tensile stress along the membrane surface acts on the filtration membrane 18.
- the end portions of the filtration membrane 18 are joined at the joining portion 30 to form the loop-shaped filtration membrane 18.
- the separation of the filtration membrane 18 from the plate 17 cannot occur, and only the tensile stress acts on the joint portion 30, so that the joint portion 30 can sufficiently withstand, and a high internal pressure can be applied in chemical cleaning. .
- the end portions of both membrane sheets are arranged to overlap each other on the main surface of the filter plate 17.
- the joining portion 30 is formed by joining the back surface at the other end on the surface at the one end.
- the sealing material 16 is formed in a watertight manner on the filtration membrane 18 at both sides along the flow direction of the liquid to be treated of the membrane element 13, the filtration membrane 18 receives the internal pressure and swells outward. Even if it becomes a state, big intensity
Abstract
Description
以下、本発明の実施の形態を図面に基づいて説明する。図1~図4において、膜分離装置をなす膜カセット11は上下に積み重ねた複数の膜モジュール12からなり、処理槽(図示省略)内の被処理液に浸漬して設置している。膜カセット11は下段の膜モジュール12の下方位置に散気装置11aが配置してある。
(膜エレメントの構成)
図3および図4に示すように、膜エレメント13は膜支持体をなす樹脂製のろ板17と、ろ板17の表裏の主面を覆って配置する平膜(有機膜)からなるろ過膜18を有しており、各膜エレメント13はろ板17の表裏の主面とろ過膜18との間に形成した透過液流路が集水ケース14の集水空間に連通している。本実施の形態では、膜支持体として樹脂製のろ板1を例示するが、膜支持体としては不織布やネット等のフレキシブルな材質のものを使用する場合もある。
通常運転
下段の膜モジュール12の下方位置に配置した散気装置11aから曝気用気体として空気を散気し、空気の気泡のエアリフト作用により膜カセット11の内部に気液混相の上昇流を生じさせる。この上昇流により処理槽(図示省略)内の被処理液を膜エレメント13の相互間に供給し、膜エレメント13の膜面に沿った被処理液の流れを形成し、ろ過膜18を透過して流れる透過液の流れに対して被処理液をクロスフローで供給する。
曝気洗浄運転
重力ろ過の場合には、集水管26に設けたバルブ(図示省略)を閉栓し、吸引ろ過の場合には、吸引ポンプを止めてろ過運転を停止する。この状態で散気装置11aを運転して曝気洗浄を行うと、優れた洗浄効果を得ることができる。
薬液洗浄
薬液洗浄時には、集水管26およびチューブ25を通して膜カセット11の各膜モジュール12に薬液を供給し、ろ板17とろ過膜18との間の透過液流路に所定圧力で薬液を供給する。このとき、ろ過膜18は内圧を受けて外側に膨らんだ状態となる。この状態において、ろ過膜18には膜面に沿った引張応力が作用する。
Claims (4)
- 被処理液の流れ方向に沿って配置する膜支持体と、膜支持体の表裏の主面を覆って配置するとともに、膜支持体の上流側および下流側の端部を含んで折り返した反転部を有してループ状をなす平膜からなるろ過膜と、被処理液の流れ方向に沿った膜支持体の両側部においてろ過膜の縁辺部上に水密に形成した封止材とからなることを特徴とする膜エレメント。
- ろ過膜は少なくとも1つの接合部を有し、接合部が膜支持体の主面上もしくは端面上でろ過膜の端部どうしを重ねて配置し、ろ過膜の一方の端部における表面上に他方の端部における裏面を接合してなることを特徴とする請求項1に記載の膜エレメント。
- 接合部において重なるろ過膜の端部うち、下流側に向いた他方の端部を外側に配置したことを特徴とする請求項2に記載の膜エレメント。
- 少なくとも1つの膜エレメントと、少なくとも1つの集水ケースを備え、
膜エレメントが、被処理液の流れ方向に沿って配置する膜支持体と、膜支持体の表裏の主面を覆って配置するとともに、膜支持体の上流側および下流側の端部を含んで折り返した反転部を有してループ状をなす平膜からなるろ過膜と、被処理液の流れ方向に沿った膜支持体の両側部においてろ過膜の縁辺部上に水密に形成した封止材を有し、
集水ケースが、内部の集水空間に連通する開口部を有し、前記開口部に挿入した前記膜エレメントの側部を水密に保持することを特徴とする膜モジュール。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010505033A JP5611032B2 (ja) | 2008-03-27 | 2008-03-27 | 浸漬型膜分離装置 |
EP08720636.3A EP2260930A4 (en) | 2008-03-27 | 2008-03-27 | MEMBRANE ELEMENT, AND MEMBRANE MODULE |
PCT/JP2008/000757 WO2009118789A1 (ja) | 2008-03-27 | 2008-03-27 | 膜エレメントおよび膜モジュール |
CN2008801283424A CN101980766A (zh) | 2008-03-27 | 2008-03-27 | 膜元件以及膜组件 |
US12/736,238 US20110011787A1 (en) | 2008-03-27 | 2008-03-27 | Membrane element and membrane module |
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PCT/JP2008/000757 WO2009118789A1 (ja) | 2008-03-27 | 2008-03-27 | 膜エレメントおよび膜モジュール |
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PCT/JP2008/000757 WO2009118789A1 (ja) | 2008-03-27 | 2008-03-27 | 膜エレメントおよび膜モジュール |
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US (1) | US20110011787A1 (ja) |
EP (1) | EP2260930A4 (ja) |
JP (1) | JP5611032B2 (ja) |
CN (1) | CN101980766A (ja) |
WO (1) | WO2009118789A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9333464B1 (en) | 2014-10-22 | 2016-05-10 | Koch Membrane Systems, Inc. | Membrane module system with bundle enclosures and pulsed aeration and method of operation |
USD779631S1 (en) | 2015-08-10 | 2017-02-21 | Koch Membrane Systems, Inc. | Gasification device |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP6294592B2 (ja) * | 2013-03-27 | 2018-03-14 | 株式会社クボタ | 膜カートリッジの製造方法 |
US9324120B2 (en) * | 2013-06-07 | 2016-04-26 | Emergency University, Inc. | Method and apparatus for emergency response notification |
US10332385B2 (en) * | 2016-11-23 | 2019-06-25 | Sap Se | Location based support request messages responsive to alert recommendation |
US10744465B2 (en) | 2017-10-10 | 2020-08-18 | Tangent Company Llc | Filtration unit |
CN107617341A (zh) * | 2017-10-16 | 2018-01-23 | 陈永石 | 可改善处理均度的膜组件清洗装置 |
NL2021249B1 (en) * | 2018-07-04 | 2020-01-15 | Redstack Bv | Membrane stack, stack assembly and foldable membrane |
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- 2008-03-27 US US12/736,238 patent/US20110011787A1/en not_active Abandoned
- 2008-03-27 CN CN2008801283424A patent/CN101980766A/zh active Pending
- 2008-03-27 EP EP08720636.3A patent/EP2260930A4/en not_active Withdrawn
- 2008-03-27 WO PCT/JP2008/000757 patent/WO2009118789A1/ja active Application Filing
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JPH10258220A (ja) * | 1997-03-19 | 1998-09-29 | Matsushita Electric Works Ltd | 汚水処理装置 |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9333464B1 (en) | 2014-10-22 | 2016-05-10 | Koch Membrane Systems, Inc. | Membrane module system with bundle enclosures and pulsed aeration and method of operation |
US9956530B2 (en) | 2014-10-22 | 2018-05-01 | Koch Membrane Systems, Inc. | Membrane module system with bundle enclosures and pulsed aeration and method of operation |
US10702831B2 (en) | 2014-10-22 | 2020-07-07 | Koch Separation Solutions, Inc. | Membrane module system with bundle enclosures and pulsed aeration and method of operation |
USD779631S1 (en) | 2015-08-10 | 2017-02-21 | Koch Membrane Systems, Inc. | Gasification device |
USD779632S1 (en) | 2015-08-10 | 2017-02-21 | Koch Membrane Systems, Inc. | Bundle body |
Also Published As
Publication number | Publication date |
---|---|
JP5611032B2 (ja) | 2014-10-22 |
CN101980766A (zh) | 2011-02-23 |
JPWO2009118789A1 (ja) | 2011-07-21 |
EP2260930A1 (en) | 2010-12-15 |
US20110011787A1 (en) | 2011-01-20 |
EP2260930A4 (en) | 2013-12-18 |
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