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WO2003002468A1 - Procede visant a reduire la concentration de cheveux, de dechets ou de matieres fibreuses dans des eaux usees - Google Patents

Procede visant a reduire la concentration de cheveux, de dechets ou de matieres fibreuses dans des eaux usees Download PDF

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Publication number
WO2003002468A1
WO2003002468A1 PCT/CA2001/000968 CA0100968W WO03002468A1 WO 2003002468 A1 WO2003002468 A1 WO 2003002468A1 CA 0100968 W CA0100968 W CA 0100968W WO 03002468 A1 WO03002468 A1 WO 03002468A1
Authority
WO
WIPO (PCT)
Prior art keywords
mixed liquor
screen
waste water
water treatment
treatment system
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.)
Ceased
Application number
PCT/CA2001/000968
Other languages
English (en)
Inventor
Deonarine Phagoo
Pierre Cote
Hidayat Husain
Doug Thompson
Boaqiang Liao
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.)
GE Zenon ULC
Original Assignee
Zenon Environmental Inc
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 Zenon Environmental Inc filed Critical Zenon Environmental Inc
Priority to PCT/CA2001/000968 priority Critical patent/WO2003002468A1/fr
Publication of WO2003002468A1 publication Critical patent/WO2003002468A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • B01D61/145—Ultrafiltration
    • 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
    • B01D61/147—Microfiltration
    • 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
    • B01D61/16—Feed pretreatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/04—Specific process operations in the feed stream; Feed pretreatment
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/40—Liquid flow rate
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C02F2301/043—Treatment of partial or bypass streams
    • 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
    • C02F2303/24—Separation of coarse particles, e.g. by using sieves or screens
    • 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 process for reducing concentrations of hair, trash, or fibrous materials, in a waste water treatment system, particularly a membrane bioreactor.
  • the screenings generated can be high in undigested organic materials that require special equipment to return the undigested organic materials from the screenings to the waste water treatment system. Moreover, screening raw 0 sewage before it enters the waste water treatment system does not remove hair, trash, or fibrous materials that can form within the system itself, such as, for example, re-roped or re-balled fibrous materials. [0005] Screening the entire sludge stream before it enters the membrane filter of the waste water treatment system must also accommodate high flow rates (typically four or more times the average design flow rate of the system) again requiring the use of large duty screens and full capacity standby screens.
  • high flow rates typically four or more times the average design flow rate of the system
  • Waste water treatment systems of this invention have a filter, such as, for example, a membrane filter or a hollow fibre membrane filter, in conjunction with a bioreactor to produce a treated effluent from the filter and waste sludge from material rejected by the filter or otherwise remaining in the bioreactor.
  • the bioreactor can be located upstream of the filter in the waste water treatment system or alternatively the filter can be in the bioreactor or a part of the bioreactor. In the latter instances the membrane of the filter is submerged directly in the bioreactor.
  • the process comprises flowing water to be treated to the waste water treatment system.
  • a portion of mixed liquor from the waste water treatment system is removed and passed through a screen to remove hair, trash, or fibrous materials from the mixed liquor.
  • the screened mixed liquor is then flowed to the waste water treatment system.
  • the flow rate of the mixed liquor through the screen is not more than about the average design flow rate of the waste water treatment system.
  • the flow rate of the mixed liquor through the screen can be about 0.10 to about 1.0 of the average design flow rate of the waste water treatment system.
  • the flow rate of the mixed liquor through the screen can be not more than about half the average design flow rate of the waste water treatment system.
  • the mixed liquor can pass through the screen at a substantially constant flow rate and can pass through the screen substantially continuously.
  • the mixed liquor to be screened can be removed from the recycle mixed liquor stream in the waste water treatment system.
  • recycled mixed liquor is recycled to the head of the waste water treatment system, and the mixed liquor to be passed through the screen can be removed from the recycle mixed liquor stream.
  • the mixed liquor to be passed through the screen can be removed from the recycle mixed liquor stream downstream of where the screened mixed liquor flows back to the recycle mixed liquor stream.
  • the mixed liquor to be screened can be removed from the waste water treatment system at various other locations.
  • the screened mixed liquor can be flowed back to the wastewater treatment system directly or to the recycle mixed liquor stream and the screenings can be either treated or disposed of directly or in combination with the waste activated sludge.
  • the openings of the screen can be not more than about 1.0 mm. Particularly, the openings can be not more than about 0.75 mm. More particularly, the openings can be not more than about 0.50 mm.
  • One screen suitable for use in this invention is, for example, a rotary drum screen.
  • the invention can be used, without limitation, with waste water treatment systems with existing screens or clarifiers on raw sewage that do not meet minimum screening requirements for membrane filters, with systems meeting minimum screening requirements where the operator desires added protection for a membrane filter, with new systems where the invention can be used in place of any other screening and in new or existing plants that will use the invention to provide both screening and sludge thickening.
  • Figure 1 is a schematic diagram illustrating a first process
  • Figure 2 is a schematic diagram illustrating a second process
  • Figure 3 is a schematic diagram illustrating a third process
  • Figure 4 is a schematic diagram illustrating a fourth process; and [0015] Figure 5 is a graph of experimental results. DETAILED DESCRIPTION OF THE INVENTION
  • a first process of the present invention is shown in Figure 1.
  • a waste water treatment system 10 is illustrated comprising a filter 12, such as, for example, a membrane filter or a hollow fibre membrane filter, and a bioreactor 14, located upstream of filter 12.
  • a filter 12 such as, for example, a membrane filter or a hollow fibre membrane filter
  • bioreactor 14 located upstream of filter 12.
  • Bioreactor 14 can comprise, without limitation, alone or in various combinations, one or more anaerobic zones, one or more anoxic zones, and one or more aerobic zones.
  • the bioreactor has a continuously stirred anoxic tank 15 at the head of the waste water treatment system 10 followed by an aeration tank 16.
  • An influent 18 of water to be treated by the waste water treatment system 10 enters the anoxic tank 15. Influent 18 can optionally be screened or clarified (not illustrated) prior to entering bioreactor 14 to remove hair, trash, or fibrous materials, and other particulate material.
  • An anoxic tank exit stream 20 carries mixed liquor from anoxic tank 15 to aeration tank 16.
  • An aerated exit stream 22 carries an aerated mixed liquor from the aeration tank 16 to the retentate or feed side of filter 12.
  • a treated effluent stream 24 exits from a permeate side of filter
  • waste sludge stream 26 consisting of material rejected by filter 12 or otherwise produced in the bioreactor 14 also exits from the filter 12. Some of the mixed liquor from waste sludge stream 26 can be recycled to bioreactor 14 through a retentate recycle stream 28.
  • a side stream 30 removes a portion of the mixed liquor from recycle stream 28 and carries the removed mixed liquor through a screen 32.
  • Screen 32 removes hair, trash, or fibrous materials, in the mixed liquor passing through it including, but not limited to, hair, trash, or fibrous materials, that can form within the bioreactor itself, such as, for example, re-roped or re- balled fibrous materials.
  • Such re-roped or re-balled fibrous materials are made from fine fibrous materials that may not be large enough to be removed by a typical screen 32 themselves but that can aggregate into larger materials in the mixed liquor.
  • a screened mixed liquor stream 34 exits from screen 32 to re- enter the waste water treatment system 10 upstream of filter 12.
  • the screened mixed liquor stream 34 carries the screened mixed liquor to retentate recycle stream 28 downstream of side stream 30.
  • Retentate recycle stream 28 carries the screened mixed liquor to bioreactor 14 at the anoxic tank 15.
  • the side stream can be taken from and returned to any portion of the waste water treatment system, however, since screen 32 removes hair, trash, or fibrous materials in the mixed liquor based on an average removal of these materials over a solids retention time of the entire bioreactor.
  • the screen openings (not illustrated) of screen 32 are typically between about 0.25 mm and 1.0 mm. Screen openings of 0.5 mm can be used when the screenings will be sent to a digester or when the screen 32 is used for sludge thickening.
  • Screen openings of 0.75 mm can be used when the screenings will be disposed of directly, for example, to a landfill.
  • the screen 32 typically blinds partly which reduces the effective screen size to increase the amount of screenings removed by the screen 32.
  • Screen 32 can be an internally fed rotary drum screen (not illustrated) equipped with a woven wire mesh or punch hole screening media.
  • Screen 32 can be equipped with external outside-in spray bars to keep the screen media clean, and diverter flights to continuously move solids to a discharge end of the screen 32.
  • Screen 32 can be, however, any fine screen with a screen size opening typically between about 0.25 mm and 1.0 mm, for example, a wedge wire screen.
  • a screenings stream 36 exits from screen 32.
  • Screening stream 36 is "stabilized” since it has been exposed to biodegradation.
  • screenings stream 36 carries hair, trash, or fibrous materials, removed from the mixed liquor by screen 32 to the waste sludge stream 26 downstream of retentate recycle stream 28.
  • screen 32 is a rotary drum screen
  • adjusting the drum speed can produce a liquid screenings stream having biodegradable solids suitable for mixing with a waste sludge stream 26 to produce a single sludge stream 37.
  • Figure 2 shows a second process (similar to the process shown in Figure 1) where the screenings stream may be further treated or disposed of directly without being returned to the waste sludge stream.
  • screening stream 36' can be compacted and dewatered and disposed without further treatment, for example, to a landfill. If the screenings stream 36' is to be disposed of without further treatment, screen 32 can be fitted with a dual sprayer system to wash the screening and reduce the amount of biomass that can be trapped or otherwise collected in the screenings before the screenings are discharged from the screen 32.
  • the amount of biomass discharged in the screenings can be less than about 15% of the dried weight of the screenings and less than about 2% of the total waste activated sludge and so will have minimal impact on biological processes in the system 10.
  • the screenings stream 36' can be equipped with compacting and dewatering means, such as a screw compactor, to provide screenings with over 40% dried solids (i.e., that passes a "paint filter test").
  • a bagging system may be used to reduce or eliminate human contact and odours.
  • Figure 3 shows a third process (similar to the processes shown in Figures 1 and 2) where the screen 32 can be used to thicken sludge so that screenings stream can, if desired, serve as the waste stream and remove biomass from the system. Except where noted and described below the same reference characters will be used to identify the same parts in Figure 3 as in Figures 1 and 2.
  • the screenings stream 36" may be a thickened sludge and may contain high solids content, for example, 10-12% dried weight for the wet screenings.
  • Screen 32 can remove additional biomass by adding to the side stream 30 upstream of the screen 32, at scheduled times, a polymer that increases the biodegradable solids content of the screenings.
  • screenings stream 36" is able to remove sufficient biomass from the system and serve as the waste stream for the system. Accordingly, the process in Figure 3 can replace the waste sludge stream 26 of Figures 1 and 2 with the retentate recycle stream 28.
  • a typical process as shown in Figure 3 generates about 0.04 kg. dried screenings per m 3 of sewage feed in the waste water treatment system with a 0.5 mm screen and a single sprayer. In contrast a 0.75 mm screen with a dual sprayer system used in the process shown in Figure 2 produces about 40% less dried screenings.
  • the mixed liquor may be passed through the screen 32 at a substantially constant flow rate without increasing substantially during peak flow conditions of the waste water treatment system.
  • the flow rate of the mixed liquor through the screen 32 can be about no more than the average design flow rate of the waste water treatment system.
  • the flow rate of the mixed liquor through the screen can be no more than about half the average design flow rate of the waste water treatment system. More particularly, the flow rate of the mixed liquor through the screen can be about 0.10 to about 0.50 of the average design flow rate of the waste water treatment system.
  • the relatively low flow rate through the screen 32 (compared to systems which screen the influent 18 directly) keeps the size of the screen 32 small while the substantially constant flow rate allows the screen 32 to be used efficiently.
  • the flow rate through the screen can be substantially continuous, however, since screen 32 removes hair, trash, or fibrous materials, in the mixed liquor based on an average removal of these materials over a solids retention time of the entire bioreactor, an interruption in flow can be tolerated without significantly impacting performance.
  • flow can be interrupted to allow for screen 32 to be replaced or repaired or to allow for other elements in the system to be checked and maintained.
  • the retentate recycle stream 28 for a water waste treatment system as illustrated in Figure 1 is typically 4-5 times the flow of influent 18 (Q).
  • the flow of influent, Q is generally equal to the average design flow of the waste water treatment system.
  • Q is equal to the volume (V) of the entire bioreactor 14 divided by HRT of the entire bioreactor.
  • Q w is equal to the volume (V) of the entire bioreactor divided by SRT of the entire bioreactor. Therefore:
  • the concentration of hair, trash, or fibrous materials, in the bioreactor 14 (X ) is:
  • the hair, trash, or fibrous materials, concentration in the bioreactor 14 (X b ) will be sixty times the hair, trash, or fibrous materials, concentration in the influent 18 (X f ).
  • the hair, trash, or fibrous materials, concentration in the bioreactor 14 will be 3.75 times the hair, trash, or fibrous materials, concentration in the influent.
  • Using a screen under these conditions should reduce the hair, trash, or fibrous materials, content in the mixed liquor by approximately 94% compared to not using a screen 32.
  • a screen 32 By using a screen 32 a substantial amount of hair, trash, or fibrous materials, is removed from the mixed liquor without having to screen the entire recycled sludge stream or the entire peak flow coming into the plant.
  • a typical plant operating at a 6 hour HRT, operating screen 32 at a flow rate of 0.25Q will process the equivalent of the total sludge volume once per day.
  • the entire sludge volume will be screened 10-20 times over a typical solids retention time which allows many opportunities for the screen 32 to capture re-roped or re-balled fibrous materials in the mixed liquor.
  • the screen 32 can be placed in a wide variety of locations. For example, Figure 4 shows a fourth process.
  • the fourth process is similar to the first process but with modifications as discussed below.
  • the filter 38 is located in a single tank bioreactor 40 with the membrane of filter 38 submerged directly in the single tank bioreactor 40.
  • side stream 30 removes a portion of the mixed liquor from waste sludge stream 26 and carries the removed mixed liquor through screen 32. Screen 32 removes hair, trash, or fibrous materials, from the mixed liquor passing through the side screen.
  • the screened mixed liquor stream 34 exits from screen 32 to re-enter single tank bioreactor 40.
  • side stream 30 can be taken directly from the single tank bioreactor 40 at a location distinct from the waste sludge stream 26. Flow rates through the side stream 30 are as described for Figure 1.
  • a pilot plant was set up (as in Figure 4) using two ZW500c-3 filtration cassettes having a filter pore size of 0.04 ⁇ m, surface area of 1320 m 3 , and a flux of 25-40 l_/m 2 /h.
  • the pilot plant was operated at a SRT of 10 days, an HRT of 3.3 hours and an MLSS of 15 g/L.
  • the screened side stream flow rate was about 1Q.
  • the plant was run under a variety of conditions as shown in Figure 5. During the side stream screening tests, a 3.0 mm screen remained on the feed. All screens used were rotary drum screens.
  • the trash (including hair or fibrous materials) concentrations in the mixed liquor for the various tests are shown in Figure 5.
  • a 0.5 mm side stream screen reduced the trash concentration from about 105 g/kg MLSS to about 7 g/kg MLSS after 23 days. This is less than the trash concentration in the mixed liquor produced by a 0.5 mm screen on the feed which was about 12 g/kg MLSS.
  • the inventors believe that this improvement is the result of the side stream screen removing re-balled or re-roped fibers.
  • the 0.5 mm side stream screen removed about 45 g of trash from the mixed liquor per cubic metre of feed.
  • Dried solids content was about 10-13% for the drained screenings.
  • the biomass fraction of the screenings varied from about 7% to 30% depending on the mixed liquor flow rate, mixed liquor concentration and rotating speed of the screen.
  • About 0.04 kg. dried screenings per m 3 of sewage feed in the waste water treatment system were generated.
  • the screenings removed consisted primarily of paper fibres, trash, sludge, hair and other stringy materials.

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Treatment Of Sludge (AREA)

Abstract

Procédé visant à réduire la concentration de cheveux, de déchets ou de matières fibreuses dans un système de traitement d'eaux usées, qui utilise un filtre à membrane conjointement avec un bioréacteur et comprend l'étape consistant à faire passer une partie de liqueur mélangée à travers un tamis dans un flux latéral. Le débit de la liqueur mélangée à travers le tamis ne dépasse approximativement pas le débit moyen normal du système de traitement d'eaux usées. Les détritus retenus par le tamis peuvent être traités ou éliminés, directement ou en combinaison avec les boues activées des eaux usées. Les ouvertures du tamis ont des dimensions comprises entre environ 0,10 mm et environ 1,0 mm, et le tamis peut être par exemple un tamis rotatif. L'invention peut servir à mettre en oeuvre à la fois un dégrillage et un épaississement des boues.
PCT/CA2001/000968 2001-06-28 2001-06-28 Procede visant a reduire la concentration de cheveux, de dechets ou de matieres fibreuses dans des eaux usees Ceased WO2003002468A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CA2001/000968 WO2003002468A1 (fr) 2001-06-28 2001-06-28 Procede visant a reduire la concentration de cheveux, de dechets ou de matieres fibreuses dans des eaux usees

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CA2001/000968 WO2003002468A1 (fr) 2001-06-28 2001-06-28 Procede visant a reduire la concentration de cheveux, de dechets ou de matieres fibreuses dans des eaux usees

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1568662A1 (fr) * 2004-02-25 2005-08-31 Passavant-Roediger Umwelttechnik GmbH Bioreacteur à membrane et méthode de traitement des eaux résiduelles
FR2893935A1 (fr) * 2005-11-28 2007-06-01 Degremont Sa Procede et installation de traitement d'effluents charges en micro-organismes.
WO2009140892A1 (fr) * 2008-05-20 2009-11-26 北京汉青天朗水处理科技有限公司 Dispositif et procédé de traitement d'eaux usées
CN102344227A (zh) * 2011-08-05 2012-02-08 波鹰(厦门)科技有限公司 一种发制品废水循环利用装置及其处理方法
US8910799B2 (en) 2011-08-01 2014-12-16 Enveera, Inc. Integrated membrane system for distributed water treatment
CN104743752A (zh) * 2015-04-17 2015-07-01 湛江紫荆羽绒制品有限公司 一种污水处理系统及其污水处理方法
DE112010000428B4 (de) * 2009-10-30 2015-09-03 Jiangsu Jinshan Environmental Protection Engineering Co., Ltd. Programmsteuergerät für den intermittierenden Filtrierbetrieb eines Membranbioreaktormoduls
CN110573461A (zh) * 2017-04-21 2019-12-13 Bl 科技公司 用于升级传统的活性污泥设备的系统和方法

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WO2001039869A1 (fr) * 1999-12-03 2001-06-07 Degremont Sa Procede de filtration membranaire de liquides et dispositif de mise en oeuvre dudit procede

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JPH0342019A (ja) * 1989-07-06 1991-02-22 Kurita Water Ind Ltd 膜分離装置
JPH06126281A (ja) * 1992-10-14 1994-05-10 Daiki Kk 中空糸膜のモジュールを用いた汚水再利用装置
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DE4443091C1 (de) * 1994-12-03 1996-01-25 Metallgesellschaft Ag Trommelsieb
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WO2001039869A1 (fr) * 1999-12-03 2001-06-07 Degremont Sa Procede de filtration membranaire de liquides et dispositif de mise en oeuvre dudit procede

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1568662A1 (fr) * 2004-02-25 2005-08-31 Passavant-Roediger Umwelttechnik GmbH Bioreacteur à membrane et méthode de traitement des eaux résiduelles
FR2893935A1 (fr) * 2005-11-28 2007-06-01 Degremont Sa Procede et installation de traitement d'effluents charges en micro-organismes.
WO2007063198A1 (fr) * 2005-11-28 2007-06-07 Degremont Procede et installation de traitement d'effluents charges en micro-organismes.
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