MW13093A1 - Wastewater treatment process with cooperating velocity equalization, aeration and decanting means - Google Patents
Wastewater treatment process with cooperating velocity equalization, aeration and decanting meansInfo
- Publication number
- MW13093A1 MW13093A1 MW13093A MW13093A MW13093A1 MW 13093 A1 MW13093 A1 MW 13093A1 MW 13093 A MW13093 A MW 13093A MW 13093 A MW13093 A MW 13093A MW 13093 A1 MW13093 A1 MW 13093A1
- Authority
- MW
- MALAWI
- Prior art keywords
- aeration
- wastewater treatment
- cooperating
- treatment process
- disclosed
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0208—Separation of non-miscible liquids by sedimentation
- B01D17/0214—Separation of non-miscible liquids by sedimentation with removal of one of the phases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0208—Separation of non-miscible liquids by sedimentation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/02—Settling tanks with single outlets for the separated liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/2405—Feed mechanisms for settling tanks
- B01D21/2416—Liquid distributors with a plurality of feed points
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/2444—Discharge mechanisms for the classified liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/30—Control equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/30—Control equipment
- B01D21/34—Controlling the feed distribution; Controlling the liquid level ; Control of process parameters
-
- 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
- C02F3/006—Regulation methods for biological treatment
-
- 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
- C02F3/1242—Small compact installations for use in homes, apartment blocks, hotels or the like
-
- 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
- C02F3/1263—Sequencing batch reactors [SBR]
-
- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
-
- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- 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
- C02F2209/42—Liquid level
-
- 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
- C02F2209/44—Time
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Health & Medical Sciences (AREA)
- Activated Sludge Processes (AREA)
- Physical Water Treatments (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Removal Of Specific Substances (AREA)
- Control Of Electric Motors In General (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Emergency Protection Circuit Devices (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/753,860 US5186821A (en) | 1991-09-03 | 1991-09-03 | Wastewater treatment process with cooperating velocity equalization, aeration and decanting means |
CA 2095731 CA2095731C (en) | 1991-09-03 | 1992-09-03 | Wastewater treatment process |
PCT/US1992/007638 WO1993004759A1 (en) | 1991-09-03 | 1992-09-03 | Wastewater treatment process |
Publications (1)
Publication Number | Publication Date |
---|---|
MW13093A1 true MW13093A1 (en) | 1994-10-12 |
Family
ID=25676156
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MW13093A MW13093A1 (en) | 1991-09-03 | 1993-11-22 | Wastewater treatment process with cooperating velocity equalization, aeration and decanting means |
Country Status (15)
Country | Link |
---|---|
US (1) | US5186821A (de) |
EP (1) | EP0575567B1 (de) |
AT (1) | ATE130526T1 (de) |
AU (1) | AU673656B2 (de) |
CA (1) | CA2095731C (de) |
DE (1) | DE69206261T2 (de) |
DK (1) | DK0575567T3 (de) |
ES (1) | ES2082506T3 (de) |
FI (1) | FI933177A0 (de) |
GR (1) | GR3019039T3 (de) |
HU (1) | HU214473B (de) |
MW (1) | MW13093A1 (de) |
NO (1) | NO931999D0 (de) |
RU (1) | RU2097102C1 (de) |
WO (1) | WO1993004759A1 (de) |
Families Citing this family (72)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5207896A (en) * | 1990-02-09 | 1993-05-04 | Norwalk Wastewater Equipment Company | Wastewater treatment mechanism |
US5234580A (en) * | 1991-09-03 | 1993-08-10 | Murphy D Thomas | Decanting apparatus with float supported submerged pump |
US5384049A (en) * | 1991-09-03 | 1995-01-24 | Murphy; D. Thomas | Wastewater treatment process |
US5759415A (en) * | 1991-10-02 | 1998-06-02 | Vortechnics, Inc. | Method and apparatus for separating floating and non-floating particulate from rainwater drainage |
US5374353A (en) * | 1993-01-21 | 1994-12-20 | Murphy; D. Thomas | Aeration train and aeration apparatus for biological purification of wastewater |
US5316671A (en) * | 1993-01-21 | 1994-05-31 | Murphy D Thomas | Submersible aeration train and aeration apparatus for biological purification of sewage |
US5421995A (en) * | 1993-07-01 | 1995-06-06 | Jmo Holding, Inc. | Sludge blanket level detector suspended from floating decanter |
WO1995019938A1 (en) * | 1994-01-24 | 1995-07-27 | Murphy Thomas D | Wastewater treatment process |
AUPM435594A0 (en) * | 1994-03-11 | 1994-03-31 | Crc For Waste Management And Pollution Control Limited | Method of operating sequencing batch reactors |
US5468375A (en) * | 1994-05-09 | 1995-11-21 | Nova Power Systems, Ltd. | Wastewater pretreatment tank assembly |
SE504228C2 (sv) * | 1995-04-24 | 1996-12-09 | Team Aqua Laeckeby Ab | Dekanteringsanordning |
US6638424B2 (en) | 2000-01-19 | 2003-10-28 | Jensen Enterprises | Stormwater treatment apparatus |
AU721064B2 (en) * | 1996-12-20 | 2000-06-22 | Evoqua Water Technologies Llc | Scouring method |
EP0963352B1 (de) * | 1997-02-28 | 2001-11-21 | Rudolf Kahr | Modulare kläranlage und verfahren zu ihrem betrieb |
US6047724A (en) * | 1998-02-11 | 2000-04-11 | Nurse, Jr.; Harry L. | Risers for a waste water treatment facility |
US6012020A (en) * | 1998-05-21 | 2000-01-04 | Gardell; Steven E | Apparatus and method for monitoring the condition of septic tanks |
EP1113997B1 (de) | 1998-07-24 | 2009-07-01 | Paques Bio Systems B.V. | Verfahren zur behandlung eines ammoniak enthaltenden abwassers |
CA2345694C (en) | 1998-09-28 | 2008-12-09 | Glen D. Lindbo | Wastewater treatment tank with influent gates and pre-react zone with an outwardly flared lower portion |
US6110383A (en) * | 1999-01-28 | 2000-08-29 | Coombs Industrial Services, Inc. | Oil/water separator |
DE19907980C2 (de) * | 1999-02-25 | 2002-09-05 | Markus Baumann | Integrierte Vorrichtung zum Behandeln von Abwasser in Kleinkläranlagen, insbesondere Einbecken-Kläranlagen |
US6315131B1 (en) | 1999-03-22 | 2001-11-13 | Universal Separators, Inc. | Multi-directional flow gravity Separator |
US6261452B1 (en) | 1999-12-23 | 2001-07-17 | American Manufacturing Company, Inc. | Laminar flow collar for use in a wastewater management system |
US7638065B2 (en) * | 2000-01-19 | 2009-12-29 | Jensen Precast | Stormwater treatment apparatus and method |
US6350374B1 (en) | 2000-01-19 | 2002-02-26 | Jensen Enterprises, Inc. | Stormwater treatment apparatus |
FR2808455B1 (fr) * | 2000-05-03 | 2003-02-14 | Schlumberger Services Petrol | Installation et procede pour la separation d'effluents multiphasiques |
US6409914B1 (en) | 2000-08-22 | 2002-06-25 | Crystal River Industries, Inc. | Waste treatment unit |
AUPR421501A0 (en) | 2001-04-04 | 2001-05-03 | U.S. Filter Wastewater Group, Inc. | Potting method |
AUPR692401A0 (en) * | 2001-08-09 | 2001-08-30 | U.S. Filter Wastewater Group, Inc. | Method of cleaning membrane modules |
US7247238B2 (en) * | 2002-02-12 | 2007-07-24 | Siemens Water Technologies Corp. | Poly(ethylene chlorotrifluoroethylene) membranes |
US7544302B2 (en) * | 2004-11-08 | 2009-06-09 | Darin Merle Harding | Method and apparatus for removing cuttings from drilling fluids |
US7160474B2 (en) * | 2004-11-08 | 2007-01-09 | Darin Merle Harding | Method and apparatus for removing cuttings from drilling fluids |
AUPS300602A0 (en) | 2002-06-18 | 2002-07-11 | U.S. Filter Wastewater Group, Inc. | Methods of minimising the effect of integrity loss in hollow fibre membrane modules |
ATE542593T1 (de) * | 2002-10-10 | 2012-02-15 | Siemens Industry Inc | Membranfilter und rückspülverfahren dafür |
NZ545206A (en) | 2003-08-29 | 2009-03-31 | Siemens Water Tech Corp | Backwash |
WO2005046849A1 (en) | 2003-11-14 | 2005-05-26 | U.S. Filter Wastewater Group, Inc. | Improved module cleaning method |
US8758621B2 (en) | 2004-03-26 | 2014-06-24 | Evoqua Water Technologies Llc | Process and apparatus for purifying impure water using microfiltration or ultrafiltration in combination with reverse osmosis |
US7243802B2 (en) * | 2004-05-13 | 2007-07-17 | Enviro Enterprises, Inc. | Inlet structure for clarifiers |
AU2005282211B2 (en) * | 2004-09-07 | 2011-04-21 | Evoqua Water Technologies Llc | Reduction of backwash liquid waste |
NZ553742A (en) | 2004-09-14 | 2010-09-30 | Siemens Water Tech Corp | Methods and apparatus for removing solids from a membrane module |
EP1807181A4 (de) | 2004-09-15 | 2009-04-22 | Siemens Water Tech Corp | Stufenlos verstellbare belüftung |
CN101623599B (zh) | 2004-12-24 | 2013-01-16 | 西门子工业公司 | 膜过滤系统中的清洗 |
NZ555987A (en) | 2004-12-24 | 2009-08-28 | Siemens Water Tech Corp | Simple gas scouring method and apparatus |
DE102005007408A1 (de) | 2005-02-18 | 2006-08-24 | Holm, Niels Christian, Dr. | Verfahren zur Verbesserung der Denitrifikation und Bio-P-Elimination beim SBR-Verfahren |
US9675938B2 (en) | 2005-04-29 | 2017-06-13 | Evoqua Water Technologies Llc | Chemical clean for membrane filter |
EP1945333B1 (de) * | 2005-08-22 | 2011-06-08 | Siemens Industry, Inc. | Anordnung zur wasserfiltration zur minimierung des rückspülvolumen |
US20070138090A1 (en) * | 2005-10-05 | 2007-06-21 | Jordan Edward J | Method and apparatus for treating wastewater |
WO2007054912A1 (en) * | 2005-11-10 | 2007-05-18 | Paterson & Cooke Consulting Engineers (Proprietary) Limited | A de-watering apparatus |
WO2008051546A2 (en) | 2006-10-24 | 2008-05-02 | Siemens Water Technologies Corp. | Infiltration/inflow control for membrane bioreactor |
US7674372B2 (en) * | 2007-01-26 | 2010-03-09 | Graves Jan D | Wastewater flow equalization system and method |
EP2129629A1 (de) | 2007-04-02 | 2009-12-09 | Siemens Water Technologies Corp. | Verbesserte infiltrations-/flusssteuerung für einen membranbioreaktor |
US9764288B2 (en) | 2007-04-04 | 2017-09-19 | Evoqua Water Technologies Llc | Membrane module protection |
ES2384694T3 (es) | 2007-05-29 | 2012-07-11 | Siemens Industry, Inc. | Limpieza de membranas con bomba impulsada por aire |
US7972505B2 (en) * | 2008-07-22 | 2011-07-05 | Trans Terra Corporation | Primary equalization settling tank |
WO2010009518A1 (en) | 2008-07-24 | 2010-01-28 | Siemens Water Technologies Corp. | Frame system for membrane filtration modules |
EP2315625B1 (de) | 2008-08-20 | 2018-05-16 | Evoqua Water Technologies LLC | Verbesserte energieeffizienz für eine membranensystem-rückspülung |
WO2010142673A1 (en) | 2009-06-11 | 2010-12-16 | Siemens Water Technologies Corp. | Methods for cleaning a porous polymeric membrane and a kit for cleaning a porous polymeric membrane |
HUE045642T2 (hu) | 2010-04-30 | 2020-01-28 | Evoqua Water Tech Llc | Folyadékáramlás elosztó készülék |
WO2012040412A1 (en) | 2010-09-24 | 2012-03-29 | Siemens Industry, Inc. | Fluid control manifold for membrane filtration system |
US20140360933A1 (en) * | 2011-09-16 | 2014-12-11 | Babak Rezania | Methods and apparatus for nitrogen removal from wastewater |
KR101964484B1 (ko) | 2011-09-30 | 2019-04-01 | 에보쿠아 워터 테크놀로지스 엘엘씨 | 개선된 매니폴드 배열 |
EP2760567B1 (de) | 2011-09-30 | 2021-12-01 | Rohm & Haas Electronic Materials Singapore Pte. Ltd | Isolierventil |
EP2866922B1 (de) | 2012-06-28 | 2018-03-07 | Evoqua Water Technologies LLC | Eintopfungsverfahren |
AU2013231145B2 (en) | 2012-09-26 | 2017-08-17 | Evoqua Water Technologies Llc | Membrane potting methods |
GB2520871B (en) | 2012-09-26 | 2020-08-19 | Evoqua Water Tech Llc | Membrane securement device |
EP2900356A1 (de) | 2012-09-27 | 2015-08-05 | Evoqua Water Technologies LLC | Gaswäscher für tauchmembranen |
CN104003571B (zh) * | 2013-02-27 | 2016-04-06 | 宁波市恒洁水务发展有限公司 | 生物脱氮系统的工艺 |
RU2553875C2 (ru) * | 2013-08-16 | 2015-06-20 | Сергей Васильевич Лузан | Устройство для насыщения воды кислородом |
AU2014329869B2 (en) | 2013-10-02 | 2018-06-14 | Evoqua Water Technologies Llc | A method and device for repairing a membrane filtration module |
CN107847869B (zh) | 2015-07-14 | 2021-09-10 | 罗门哈斯电子材料新加坡私人有限公司 | 用于过滤系统的通气装置 |
EP3516123A4 (de) * | 2016-09-22 | 2020-04-29 | Flow Control LLC. | Duschablaufkasten |
CN112221214A (zh) * | 2020-10-12 | 2021-01-15 | 湖南创大玉兔化工有限公司 | 澄清钛液与沉淀泥浆自动分层吸送装置 |
RU209814U1 (ru) * | 2021-10-04 | 2022-03-23 | Роман Николаевич Михайлов | Установка биологической очистки стоков |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2140059A (en) * | 1936-05-12 | 1938-12-13 | Simonsen Arntz | Decanting mechanism |
US3907672A (en) * | 1972-04-21 | 1975-09-23 | George A Milne | Aerobic sewage digestion system |
US3834536A (en) * | 1973-10-10 | 1974-09-10 | Northern Purification Services | Aerobic wastewater treatment apparatus |
US4278541A (en) * | 1978-03-14 | 1981-07-14 | Amstar Corporation | Separator employing an annular vertical feedwell with associated concentric annular baffle plate and method of using same to separate solids from liquids |
US4230578A (en) * | 1979-04-09 | 1980-10-28 | Jet, Inc. | Sewage effluent volume control and alarm arrangement for pressurized sewage disposal system |
US4695376A (en) * | 1986-10-20 | 1987-09-22 | Aqua-Aerobic Systems, Inc. | Floating decanter |
US5104528A (en) * | 1990-09-24 | 1992-04-14 | Christie Stanley E | Floating decanter |
-
1991
- 1991-09-03 US US07/753,860 patent/US5186821A/en not_active Expired - Lifetime
-
1992
- 1992-09-03 WO PCT/US1992/007638 patent/WO1993004759A1/en active IP Right Grant
- 1992-09-03 DE DE69206261T patent/DE69206261T2/de not_active Expired - Fee Related
- 1992-09-03 ES ES92920583T patent/ES2082506T3/es not_active Expired - Lifetime
- 1992-09-03 RU RU93056860A patent/RU2097102C1/ru active
- 1992-09-03 CA CA 2095731 patent/CA2095731C/en not_active Expired - Fee Related
- 1992-09-03 HU HU9301908A patent/HU214473B/hu not_active IP Right Cessation
- 1992-09-03 AT AT92920583T patent/ATE130526T1/de not_active IP Right Cessation
- 1992-09-03 AU AU26527/92A patent/AU673656B2/en not_active Ceased
- 1992-09-03 DK DK92920583T patent/DK0575567T3/da active
- 1992-09-03 EP EP92920583A patent/EP0575567B1/de not_active Expired - Lifetime
-
1993
- 1993-06-02 NO NO931999A patent/NO931999D0/no unknown
- 1993-07-12 FI FI933177A patent/FI933177A0/fi not_active Application Discontinuation
- 1993-11-22 MW MW13093A patent/MW13093A1/xx unknown
-
1996
- 1996-02-21 GR GR960400442T patent/GR3019039T3/el unknown
Also Published As
Publication number | Publication date |
---|---|
EP0575567B1 (de) | 1995-11-22 |
AU2652792A (en) | 1993-04-05 |
ATE130526T1 (de) | 1995-12-15 |
ES2082506T3 (es) | 1996-03-16 |
EP0575567A1 (de) | 1993-12-29 |
DE69206261D1 (de) | 1996-01-04 |
WO1993004759A1 (en) | 1993-03-18 |
EP0575567A4 (de) | 1994-01-19 |
US5186821A (en) | 1993-02-16 |
FI933177A (fi) | 1993-07-12 |
CA2095731A1 (en) | 1994-03-04 |
CA2095731C (en) | 1998-12-08 |
FI933177A0 (fi) | 1993-07-12 |
AU673656B2 (en) | 1996-11-21 |
DK0575567T3 (da) | 1996-04-09 |
HU9301908D0 (en) | 1993-11-29 |
RU2097102C1 (ru) | 1997-11-27 |
NO931999D0 (no) | 1993-06-02 |
HUT68998A (en) | 1995-08-28 |
DE69206261T2 (de) | 1996-07-04 |
HU214473B (hu) | 1998-03-30 |
GR3019039T3 (en) | 1996-05-31 |
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