LV11830B - Wastewater treatment method and plant - Google Patents

Wastewater treatment method and plant Download PDF

Info

Publication number
LV11830B
LV11830B LVP-97-97A LV970097A LV11830B LV 11830 B LV11830 B LV 11830B LV 970097 A LV970097 A LV 970097A LV 11830 B LV11830 B LV 11830B
Authority
LV
Latvia
Prior art keywords
pressure
biological
under pressure
wastewater
waste water
Prior art date
Application number
LVP-97-97A
Other languages
English (en)
Latvian (lv)
Other versions
LV11830A (lv
Inventor
Barnett Kenneth Edward
Original Assignee
Actew Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Actew Corp Ltd filed Critical Actew Corp Ltd
Publication of LV11830A publication Critical patent/LV11830A/xx
Publication of LV11830B publication Critical patent/LV11830B/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/02Aerobic processes
    • C02F3/08Aerobic processes using moving contact bodies
    • C02F3/085Fluidized beds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03DFLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00Flotation
    • B03D1/14Flotation machines
    • B03D1/1431Dissolved air flotation machines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03DFLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00Flotation
    • B03D1/14Flotation machines
    • B03D1/24Pneumatic
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/24Treatment of water, waste water, or sewage by flotation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/02Aerobic processes
    • C02F3/12Activated sludge processes
    • C02F3/26Activated sludge processes using pure oxygen or oxygen-rich gas
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • C02F3/302Nitrification and denitrification treatment
    • 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
    • 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S210/00Liquid purification or separation
    • Y10S210/902Materials removed
    • Y10S210/903Nitrogenous

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Microbiology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Biotechnology (AREA)
  • Physical Water Treatments (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Biological Treatment Of Waste Water (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Activated Sludge Processes (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
LVP-97-97A 1994-11-18 1997-05-16 Wastewater treatment method and plant LV11830B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPM9571A AUPM957194A0 (en) 1994-11-18 1994-11-18 Wastewater treatment method and plant
PCT/AU1995/000764 WO1996015991A1 (en) 1994-11-18 1995-11-17 Wastewater treatment method and plant

Publications (2)

Publication Number Publication Date
LV11830A LV11830A (lv) 1997-08-20
LV11830B true LV11830B (en) 1997-12-20

Family

ID=3784082

Family Applications (1)

Application Number Title Priority Date Filing Date
LVP-97-97A LV11830B (en) 1994-11-18 1997-05-16 Wastewater treatment method and plant

Country Status (28)

Country Link
US (1) US5961830A (ro)
EP (1) EP0790960A4 (ro)
JP (1) JP3358066B2 (ro)
KR (1) KR100320782B1 (ro)
CN (1) CN1099382C (ro)
AU (2) AUPM957194A0 (ro)
BR (1) BR9510353A (ro)
CA (1) CA2205003C (ro)
CZ (1) CZ289983B6 (ro)
EE (1) EE9700114A (ro)
FI (1) FI972093A (ro)
HK (1) HK1008213A1 (ro)
HU (1) HUT77193A (ro)
LT (1) LT4288B (ro)
LV (1) LV11830B (ro)
MD (1) MD970188A (ro)
MX (1) MX9703625A (ro)
MY (1) MY118395A (ro)
NO (1) NO972268L (ro)
NZ (1) NZ295324A (ro)
PL (1) PL320739A1 (ro)
RU (1) RU2135420C1 (ro)
SI (1) SI9520119A (ro)
SK (1) SK60597A3 (ro)
TW (1) TW426642B (ro)
UA (1) UA48153C2 (ro)
WO (1) WO1996015991A1 (ro)
ZA (1) ZA959806B (ro)

Families Citing this family (58)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2551202C (en) 1996-12-20 2010-10-26 Usf Filtration And Separations Group, Inc. Scouring method
MD1637C2 (ro) * 1998-03-20 2001-09-30 Олег ЛАШКОВ Instalaţie pentru epurarea apelor uzate
US6565750B2 (en) 2000-08-31 2003-05-20 O'brien & Gere Engineers, Inc. Trickling filter system for biological nutrient removal
US6444126B1 (en) 2000-09-19 2002-09-03 T. M. Gates, Inc. System and method for treating sanitary wastewater for on-site disposal
US7261811B2 (en) 2000-10-02 2007-08-28 The University Of Western Ontario Liquid-solid circulating fluidized bed waste water treatment system for simultaneous carbon, nitrogen and phosphorus removal
US7736513B2 (en) 2000-10-02 2010-06-15 The University Of Western Ontario Liquid-solid fluidized bed waste water treatment system for simultaneous carbon, nitrogen and phosphorous removal
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
US7097762B1 (en) 2002-03-29 2006-08-29 Icm, Inc. Modular waste water treatment system
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
US6998048B1 (en) * 2002-12-09 2006-02-14 Keith Dobie Method and apparatus for cleaning effluent
KR101115173B1 (ko) 2003-08-29 2012-02-24 지멘스 워터 테크놀로지스 코포레이션 역류
US7022233B2 (en) * 2003-11-07 2006-04-04 Severn Trent Services, Water Purification Solutions, Inc. Biologically active reactor system and method for treating wastewater
EP1687078B1 (en) 2003-11-14 2012-03-14 Siemens Industry, Inc. Improved module cleaning method
WO2005090243A1 (ja) * 2004-03-22 2005-09-29 C & R Co. 加圧式生物的排水浄化処理法
WO2005092799A1 (en) 2004-03-26 2005-10-06 U.S. Filter Wastewater Group, Inc. Process and apparatus for purifying impure water using microfiltration or ultrafiltration in combination with reverse osmosis
AU2005282211B2 (en) 2004-09-07 2011-04-21 Evoqua Water Technologies Llc Reduction of backwash liquid waste
US8506806B2 (en) 2004-09-14 2013-08-13 Siemens Industry, Inc. Methods and apparatus for removing solids from a membrane module
NZ553771A (en) 2004-09-15 2010-11-26 Siemens Water Tech Corp Continuously variable aeration of membrane filtration system and flow control device when used in such application
JP2006082033A (ja) * 2004-09-17 2006-03-30 Oki Electric Ind Co Ltd 有機廃液処理装置及び有機廃液処理方法
NZ583228A (en) 2004-12-24 2012-05-25 Siemens Industry Inc Cleaning in membrane filtration systems
EP1838422A4 (en) 2004-12-24 2009-09-02 Siemens Water Tech Corp EASY GAS FLUSHING PROCESS AND APPROPRIATE DEVICE
EP1885475B1 (en) 2005-04-29 2015-03-25 Evoqua Water Technologies LLC Chemical clean for membrane filter
US7374675B2 (en) * 2005-05-16 2008-05-20 Koopmans Richard J Mixer for use in wastewater treatment processes
CN101287538B (zh) 2005-08-22 2013-03-06 西门子工业公司 使用歧管以减少回洗的水过滤装置
US20070138090A1 (en) 2005-10-05 2007-06-21 Jordan Edward J Method and apparatus for treating wastewater
CA2626941A1 (en) * 2005-11-08 2007-05-18 Siemens Water Technologies Corp. Combination membrane/biolytic filtration
US7520990B2 (en) * 2006-02-28 2009-04-21 Icm, Inc. Anaerobic wastewater treatment system and method
WO2008051546A2 (en) 2006-10-24 2008-05-02 Siemens Water Technologies Corp. Infiltration/inflow control for membrane bioreactor
WO2008123972A1 (en) 2007-04-02 2008-10-16 Siemens Water Technologies Corp. Improved infiltration/inflow control for membrane bioreactor
US9764288B2 (en) 2007-04-04 2017-09-19 Evoqua Water Technologies Llc Membrane module protection
CA2822316A1 (en) 2007-05-29 2008-12-18 Siemens Industry, Inc. Membrane cleaning with pulsed airlift pump
FR2919601B1 (fr) 2007-07-30 2011-05-27 Degremont Procede et installation d'epuration d'eaux residuaires par un traitement biologique.
WO2009033291A1 (en) * 2007-09-14 2009-03-19 Bionest Technologies Inc. Wastewater treatment
US8216472B2 (en) * 2008-01-04 2012-07-10 Murdoch University Biological nitrogen removal
CN106064021B (zh) 2008-07-24 2019-06-04 懿华水处理技术有限责任公司 用于膜过滤模块的框架系统
CN102123784A (zh) 2008-08-20 2011-07-13 西门子水处理技术公司 改进的膜系统反洗能效
EP2165982A1 (en) 2008-09-17 2010-03-24 National University of Ireland, Galway A biological reactor for wastewater
ITMI20090861A1 (it) * 2009-05-15 2010-11-16 Bioenergia S R L Processo per il trattamento biologico dei reflui organici e relativo impianto.
US8734647B2 (en) * 2009-05-15 2014-05-27 Bioenergia S.R.L. Process for the biologic treatment of organic wastes and plant therefor
AU2010101488B4 (en) 2009-06-11 2013-05-02 Evoqua Water Technologies Llc Methods for cleaning a porous polymeric membrane and a kit for cleaning a porous polymeric membrane
EP2563501B1 (en) 2010-04-30 2019-05-15 Evoqua Water Technologies LLC Fluid flow distribution device
EP2588419B1 (en) 2010-07-01 2018-06-06 Alexander Fassbender Wastewater treatment
AU2011305377B2 (en) 2010-09-24 2014-11-20 Evoqua Water Technologies Llc Fluid control manifold for membrane filtration system
RU2477710C2 (ru) * 2011-03-31 2013-03-20 Андрей Андреевич Степкин Способ переработки депонированного илового осадка сточных вод, установка для его осуществления и активатор
KR20140097140A (ko) 2011-09-30 2014-08-06 에보쿠아 워터 테크놀로지스 엘엘씨 아이솔레이션 밸브
EP2763776B1 (en) 2011-09-30 2021-07-28 Rohm & Haas Electronic Materials Singapore Pte. Ltd Improved filtration module assembly
EP2866922B1 (en) 2012-06-28 2018-03-07 Evoqua Water Technologies LLC A potting method
US9962865B2 (en) 2012-09-26 2018-05-08 Evoqua Water Technologies Llc Membrane potting methods
DE112013004713T5 (de) 2012-09-26 2015-07-23 Evoqua Water Technologies Llc Membransicherungsvorrichtung
AU2013101765A4 (en) 2012-09-27 2016-10-13 Evoqua Water Technologies Llc Gas Scouring Apparatus for Immersed Membranes
US9809479B2 (en) * 2012-11-30 2017-11-07 Tangent Company Llc Method and apparatus for residential water recycling
AU2014329869B2 (en) 2013-10-02 2018-06-14 Evoqua Water Technologies Llc A method and device for repairing a membrane filtration module
EP3322511B1 (en) 2015-07-14 2022-09-07 Rohm & Haas Electronic Materials Singapore Pte. Ltd Aeration device for filtration system
FR3061170A1 (fr) * 2016-12-28 2018-06-29 Veolia Water Solutions & Technologies Support Procede de traitement des eaux par biofloculation et flottation,et installation correspondante
US10703658B2 (en) 2017-03-06 2020-07-07 Tangent Company Llc Home sewage treatment system
CN112871462A (zh) * 2021-01-13 2021-06-01 南京银茂铅锌矿业有限公司 一种铅锌硫化矿废水精细化分质回用的选矿工艺方法

Family Cites Families (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3246885A (en) * 1963-05-27 1966-04-19 Fuller Co Saturation tank
CH412734A (de) * 1963-09-02 1966-04-30 Cellulosefabrik Attisholz Ag V Verfahren und Einrichtung zur Reinigung von Abwasser nach dem Belebtschlammverfahren
US3444076A (en) * 1965-10-20 1969-05-13 Kurita Industrial Co Ltd Method of treating organic waste water
US3542675A (en) * 1968-07-26 1970-11-24 Combustion Eng Water treatment
US3574331A (en) * 1968-12-18 1971-04-13 Mitsubishi Kakoki Kk Aeration tank for waste treatment
US3617539A (en) * 1969-05-15 1971-11-02 Standard Oil Co Process for removing contaminants from waste-water
US3576738A (en) * 1969-08-04 1971-04-27 Signal Companies The Process for purification of oil production waste water
US3725264A (en) * 1972-03-13 1973-04-03 Signal Oil & Gas Co Waste water treatment process
US3846289A (en) * 1972-06-19 1974-11-05 Ecolotrol Waste treatment process
US4009099A (en) * 1974-07-12 1977-02-22 Ecolotrol, Inc. Apparatus and process for removing ammonia nitrogen from waste water
US4315821A (en) * 1975-01-06 1982-02-16 Du Pont Canada Inc. Treatment of nitrogenous wastes
AU499407B2 (en) * 1975-07-24 1979-04-12 Taira-Werke Dr. Rer. Nat. Ulrich Baensch Gmbh Removal of impurities dissolved in water
DE2550818C3 (de) * 1975-11-12 1978-05-18 Michael 6600 Saarbruecken Funk Verfahren und Vorrichtung zur biologischen Abwasserreinigung nach dem Schlammbelebungsverfahren
DE2553050A1 (de) * 1975-11-26 1977-06-16 Baensch Tetra Werke Geraet und verfahren zur austreibung von im wasser geloesten verunreinigungen, hauptsaechlich nitraten
DE2554169A1 (de) * 1975-12-02 1976-12-09 Menzel & Co Verfahren zur aeroben behandlung von fluessigen abfallstoffen
US4056465A (en) * 1976-04-12 1977-11-01 Air Products And Chemicals, Inc. Production of non-bulking activated sludge
US4069149A (en) * 1976-05-14 1978-01-17 Idaho Research Foundation, Inc. Continuous fermentation process and apparatus
FR2400489A1 (fr) * 1977-08-17 1979-03-16 Carboxyque Francaise Procede et dispositif de traitement, par voie biologique, d'eaux residuaires
CA1114963A (en) * 1979-10-26 1981-12-22 Canadian Industries Limited Means for separation of gas and solids from waste mixed liquor
JPS57136994A (en) * 1981-02-17 1982-08-24 Mitsui Miike Mach Co Ltd Aeration tank for activated sludge treatment
AT380863B (de) * 1982-06-16 1986-07-25 Sera Aquaristik Gmbh Verfahren und vorrichtung zur biologischen anaeroben denitrifikation von aquariumwasser
EP0193979A3 (fr) * 1985-02-25 1989-01-11 ACEC, Société Anonyme Procédé d'élimination de nitrates au moyen d'une conversion micro-biologique en présence d'hydrogène gazeux
US4948509A (en) * 1988-08-24 1990-08-14 Charles Stack & Associates, Inc. Anaerobic fermentation process
US5075384A (en) * 1989-08-03 1991-12-24 Monsanto Coating compositions containing ethylenically unsaturated carbamates
DE4331927C2 (de) * 1992-09-17 1995-07-13 Mannesmann Ag Verfahren zur biochemischen Entfernung von Stickstoff und Phosphor aus Abwasser
US5310485A (en) * 1992-09-30 1994-05-10 Darling-Delaware Company, Inc. Process for dissolved gas flotation in anaerobic wastewater treatment
US5484534A (en) * 1994-07-08 1996-01-16 Edmondson; Jerry M. Energy conserving method of water treatment
US5516434A (en) * 1995-05-26 1996-05-14 Unicel, Inc. Single cell gas flotation separator with filter media

Also Published As

Publication number Publication date
KR100320782B1 (ko) 2002-06-27
LT4288B (lt) 1998-01-26
CA2205003C (en) 2002-01-29
AU3864495A (en) 1996-06-17
TW426642B (en) 2001-03-21
SI9520119A (en) 1997-12-31
AUPM957194A0 (en) 1994-12-15
LV11830A (lv) 1997-08-20
MX9703625A (es) 1997-08-30
EP0790960A1 (en) 1997-08-27
CZ151397A3 (en) 1997-10-15
WO1996015991A1 (en) 1996-05-30
MD970188A (ro) 1999-01-31
AU682984B2 (en) 1997-10-23
UA48153C2 (uk) 2002-08-15
HUT77193A (hu) 1998-03-02
BR9510353A (pt) 1997-12-23
HK1008213A1 (en) 1999-05-07
FI972093A0 (fi) 1997-05-16
EE9700114A (et) 1997-12-15
CZ289983B6 (cs) 2002-05-15
RU2135420C1 (ru) 1999-08-27
SK60597A3 (en) 1997-11-05
MY118395A (en) 2004-10-30
US5961830A (en) 1999-10-05
NO972268D0 (no) 1997-05-16
CN1171767A (zh) 1998-01-28
CN1099382C (zh) 2003-01-22
NO972268L (no) 1997-07-15
EP0790960A4 (en) 1999-04-21
ZA959806B (en) 1996-06-04
CA2205003A1 (en) 1996-05-30
NZ295324A (en) 1997-06-24
JP3358066B2 (ja) 2002-12-16
PL320739A1 (en) 1997-10-27
FI972093A (fi) 1997-07-02
LT97088A (en) 1997-09-25
JPH10510203A (ja) 1998-10-06

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