WO2004000732A1 - Water purification system - Google Patents
Water purification system Download PDFInfo
- Publication number
- WO2004000732A1 WO2004000732A1 PCT/EP2003/005468 EP0305468W WO2004000732A1 WO 2004000732 A1 WO2004000732 A1 WO 2004000732A1 EP 0305468 W EP0305468 W EP 0305468W WO 2004000732 A1 WO2004000732 A1 WO 2004000732A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- water
- unit
- chemical purifying
- chemical
- chamber
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
- C02F9/20—Portable or detachable small-scale multistage treatment devices, e.g. point of use or laboratory water purification systems
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
- C02F1/685—Devices for dosing the additives
- C02F1/688—Devices in which the water progressively dissolves a solid compound
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
- C02F1/766—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens by means of halogens other than chlorine or of halogenated compounds containing halogen other than chlorine
-
- 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
- C02F2303/04—Disinfection
-
- 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
- C02F2303/18—Removal of treatment agents after treatment
-
- 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
- C02F2303/18—Removal of treatment agents after treatment
- C02F2303/185—The treatment agent being halogen or a halogenated compound
Definitions
- the present invention relates to a water purification system and in particular to a gravity fed water purification system for the generation and dispensing of purified water of superior quality.
- the biological contaminants may be susceptible to harsher chemical treatment, but such chemicals are, typically, themselves contaminants or can not be easily incorporated in gravity-fed treatment devices, especially those for household use.
- many of these biological contaminants such as protozoan cysts like cryptosporidium, are only a few microns in size.
- Water treatment devices are well known in the art. Such devices are employed directly in a water system, either in-line or at the terminal end, or in self-contained batch systems.
- An example of an in-line system is an under the counter device which filters water prior to reaching the faucet.
- Terminal end devices include counter top and faucet mounted filtration.
- Self-contained batch systems include gravity fed systems or carafe units.
- Iodinated resin systems have also been employed to disinfect drinking water. These systems involve iodide molecules in a resin bed, formed of beads of iodide molecules tightly bound to a base copolymer, ion exchange resin, usually a styrene/divinyl benzene (DVB) copolymer. Water passing through the resin bed becomes turbulent. The turbulence forces the microbes, such as bacteria, protozoan cysts and viruses, into substantial contact with the iodinated beads. As a result of these contacts, iodine is transferred to the microbes as molecular iodine, where it undergoes a redox reaction with the microbes, deactivating them.
- ion exchange resin usually a styrene/divinyl benzene (DVB) copolymer.
- Water passing through the resin bed becomes turbulent. The turbulence forces the microbes, such as bacteria, protozoan cysts and viruses, into substantial contact with
- the iodine is also eluted into the water in minute amounts, typically about 0.5 parts per million (ppm) .
- the exact amount of residual iodine given off is a function of residence time, temperature, flow rate, as well as the level and type of ions in the input water.
- US 5518613 discloses a portable water purifying and drinking device that is designed to eliminate potentially harmful parasites 1-2 microns in size, from the water to be purified.
- the device includes a chemical purifying agent and a residence chamber that allows an induction period for the purifying to take place. This functioning of this device is dependent on the pressure drop required to move the fluid through the conduit, which is in the range of 1-5 psi (generated by the user's mouth by suction) .
- W09529878 (Recovery Engineering Inc. 1995), discloses a water purifying device, comprising a disinfecting unit comprising an iodinated resin unit and an activated charcoal unit.
- the basic principle is that the volume dimensions and liquid flow rate in the wait time chamber are maintained to deactivate bacteria, viruses and other contaminants. It is also essential that the liquid stream proceeds uniformly such that the first portion of liquid to enter the unit leads the liquid stream and does not mix with liquid that entered prior to or after that .
- the present invention provides a simple and cost-effective gravity fed water purification system with the desired high microbiological purity.
- the system is conveniently adaptable for household/residential use in varying dimensions according to user requirements.
- the present invention provides a gravity fed water purification system comprising a filtration unit adapted to filter particulate material, and a chemical purifying unit containing a chemical purifying agent, in which the chemical purifying unit is housed in a sealed chamber and is in fluid communication with the filtration unit such that water treated by the filtration unit is then gravity fed into the chemical purifying unit and retained therein for a predetermined period, after which the water exits the system via a scavenger means which is adapted to recover leached chemical purifying agent.
- the system of the invention effectively combines a filtration unit for particulate material and a chemical purifying unit, so that not only particulates (typically those greater than 2 micron size) are separated, but also the filtered particulate-free water is subjected to subsequent treatment with a chemical purifying agent for a sufficient period to ensure the delivery of microbiologically pure water of high quality whilst maintaining the simplicity and advantages of gravity fed filtration systems.
- the gravity fed water purification system of the invention typically comprises a purification unit comprising a top chamber and a bottom chamber, which are separated by a partition.
- the filtration unit is typically secured to the partition and housed in the top chamber, and the chemical purifying unit is housed in the bottom chamber.
- the filtration unit comprises a carbon block.
- the water exit passage comprises one or more pipes which have an inlet that is positioned just below the partition between the top and bottom chambers.
- the water exit passage is connected to the scavenger means which is adapted to recover leached chemical purifying agent.
- the scavenger means comprises bacteriostatic activated carbon encased by a collection chamber.
- the system comprises a purification unit having a top chamber (TC) and a bottom chamber (BC) separated by a partition (PR) .
- a carbon block (CB) is fitted on the upper side of the partition which is in fluid communication with a resin cartridge (CR) on the bottom chamber (BC) .
- the resin cartridge (CR) contains chemical purifying agent.
- the bottom chamber (BC) is provided with pipes (P) emerging from the bottom sealed side (BS) which extend to a level just below the partition (PR) .
- the dimensions and disposition of the pipes (P) govern the residence time of the water in the bottom chamber (BC) and thus its exposure to the purifying agent in the resin cartridge (CR) .
- Water exiting from the resin cartridge (CR) is guided by a cylindrical downcomer (J) .
- the water collects in the chamber (BC) until the level of the water has reached the inlet (I) of the pipes (P) and flows down into a common header (H) which then leads to the scavenging unit (SC) which is overhanging in the dispensing chamber
- the water collected in collection chamber (CC) can be dispensed through a tap (T) for use.
- Figure 2 is another embodiment of the invention where the system comprises a purification unit with a top chamber (TC) and a bottom chamber (BC) separated by a partition (PR) .
- a carbon block (CB) is fitted on the upper side of the partition (PR) and in fluid communication with a resin cartridge (CR) located on the lower side of the partition (PR) .
- Water collected in the bottom chamber (BC) is transported down to a collection chamber (CC) provided at the base (B) of the unit.
- the water collects in the collection chamber (CC) until the level of the water has reached the scavenging unit (SC) which is in fluid communication with the collection chamber (CC) .
- the water after passing through the scavenging unit (SC) is collected in the dispensing chamber (DC) and can be dispensed through a tap (T) for use.
- Figure 3 is a further embodiment of the invention which can be fitted on to a bubble top dispenser with a pressure equalising device.
- the system comprises a purification unit having a top chamber (TC) and a bottom chamber (BC) which are maintained in air tight sealed conditions and separated by a partition (PR) .
- a carbon block (CB) provides filtration of particulate matter and a cartridge (CR) provides chemical purification.
- PV pressure equalising device/valve
- the chamber (C) is provided with pipes (P) emerging from the bottom sealed side (BS) which extend to a level just below the partition (PR) .
- the water collects in the chamber (C) until the level of the water has reached the inlet (I) of the pipe and flows down into a common header (H) which then leads to the scavenging unit (SC) which is overhanging in the bottom chamber (BC) .
- the purification unit detailed above is installed on top of the dispensing chamber (DC) and is maintained in operative communication with a dispenser via a central opening in the bottom chamber which further extends in the form of a nozzle (NZ) into the dispenser top.
- the dispenser is provided with a tap (T) through which regulated supply of the purified water can be achieved.
- the purification system comprises of a top chamber fitted with a pre-filter made of a coarse sediment filter and activated carbon to enable removal of chlorine, organics, particulate matter and pathogenic cysts .
- the filtered water then goes through a chemical purification unit which has a chemical purifying agent such as iodine or chlorine suitably impregnated on a inert carrier such as ion exchange resin. As the water passes through the chemical purification unit it leaches out a certain amount of the chemical purifying agent from the resin.
- the chemical purifying agent is then scavenged by passing the water through a unit comprising bacteriostatic activated carbon and/or ion exchange resin or any other known means after a residence time which is a period of not less than 30 minutes of its exit from the chemical purifying unit.
- the residence time is in the range 30 to 300 minutes and more preferably 60-180 minutes.
- Example 2 the construction of the water purifier was according to Example 1 but the carbon block was not introduced.
- Example 3 a conventional type filter was used.
Landscapes
- Water Supply & Treatment (AREA)
- Clinical Laboratory Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Biological Treatment Of Waste Water (AREA)
- Filtration Of Liquid (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR0311779-0A BR0311779A (en) | 2002-06-19 | 2003-05-22 | Gravity-fed water purification system |
CNB038140489A CN1331762C (en) | 2002-06-19 | 2003-05-22 | Water purification system |
AU2003240707A AU2003240707A1 (en) | 2002-06-19 | 2003-05-22 | Water purification system |
MXPA04012523A MXPA04012523A (en) | 2002-06-19 | 2003-05-22 | Water purification system. |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IN539MU2002 | 2002-06-19 | ||
IN539/MUM/2002 | 2002-06-19 | ||
EP02255472.9 | 2002-08-05 | ||
EP02255472 | 2002-08-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004000732A1 true WO2004000732A1 (en) | 2003-12-31 |
Family
ID=30001873
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2003/005468 WO2004000732A1 (en) | 2002-06-19 | 2003-05-22 | Water purification system |
Country Status (9)
Country | Link |
---|---|
CN (1) | CN1331762C (en) |
AR (1) | AR039681A1 (en) |
AU (1) | AU2003240707A1 (en) |
BR (1) | BR0311779A (en) |
MX (1) | MXPA04012523A (en) |
MY (1) | MY130646A (en) |
PL (1) | PL212324B1 (en) |
RU (1) | RU2344085C2 (en) |
WO (1) | WO2004000732A1 (en) |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0578512B1 (en) * | 1992-07-09 | 1998-11-11 | Varian Associates, Inc. | Single crystal field emission device |
WO2005095284A1 (en) * | 2004-03-19 | 2005-10-13 | Unilever N.V. | Water purification system |
WO2006134414A1 (en) | 2005-06-13 | 2006-12-21 | Nokia Corporation | Supporting an assisted satellite based positioning |
WO2007000238A1 (en) * | 2005-06-29 | 2007-01-04 | Unilever N.V. | Device for dispensing a unit-dose of disinfecting agent |
US7441665B2 (en) | 2003-10-01 | 2008-10-28 | Halosource, Inc. | Water purification cartridge |
WO2010034687A1 (en) * | 2008-09-23 | 2010-04-01 | Unilever Nv | Water purification device |
US7701387B2 (en) | 2005-06-13 | 2010-04-20 | Nokia Corporation | Supporting an assisted satellite based positioning |
EP2184263A1 (en) | 2008-11-06 | 2010-05-12 | Unilever N.V. | Water purification device |
EP2189421A1 (en) | 2008-11-24 | 2010-05-26 | Unilever N.V. | A total mass flow meter and a water purification device |
WO2010086079A2 (en) | 2009-01-30 | 2010-08-05 | Unilever Nv | A filter |
USD647595S1 (en) | 2007-09-20 | 2011-10-25 | Omnipure Filter Company, Inc. | Filter block for liquid filtration |
WO2012025343A1 (en) | 2010-08-24 | 2012-03-01 | Unilever Nv | Water purification device comprising a gravity- fed filter |
US8167141B2 (en) | 2004-06-30 | 2012-05-01 | Brita Lp | Gravity flow filter |
WO2012059301A1 (en) | 2010-11-01 | 2012-05-10 | Unilever Nv | A residence time chamber |
WO2013053627A1 (en) | 2011-10-10 | 2013-04-18 | Unilever N.V. | A faucet mounted liquid fortificant dosing device and dispension method |
WO2014095344A1 (en) | 2012-12-20 | 2014-06-26 | Unilever N.V. | A tablet composition for an automatic shut off mechanism |
US10035131B2 (en) | 2011-11-24 | 2018-07-31 | Indian Institute Of Technology | Multilayer organic-templated-boehmite-nanoarchitecture for water purification |
US10041925B2 (en) | 2012-04-17 | 2018-08-07 | Indian Institute Of Technology | Detection of quantity of water flow using quantum clusters |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1870381B1 (en) * | 2006-06-12 | 2009-06-24 | Unilever N.V. | A biocide cartridge |
PL1982961T3 (en) * | 2007-04-18 | 2011-05-31 | Unilever Nv | Disinfectant device and process |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4714546A (en) * | 1986-02-10 | 1987-12-22 | Newport Filters, Inc. | Potable water filter |
US5061367A (en) * | 1989-10-13 | 1991-10-29 | Ametek, Inc. | Water purifying filter device |
US5308482A (en) * | 1988-02-29 | 1994-05-03 | Pre-Mac Kent Ltd. | Portable water-purifying devices |
US5562824A (en) * | 1994-10-12 | 1996-10-08 | Wtc/Ecomaster Corporation | Gravity water purifier |
US5897770A (en) * | 1997-10-23 | 1999-04-27 | Plymouth Products, Inc. | Center core cartridge feeder insert |
-
2003
- 2003-05-22 AU AU2003240707A patent/AU2003240707A1/en not_active Abandoned
- 2003-05-22 RU RU2005101082/15A patent/RU2344085C2/en not_active IP Right Cessation
- 2003-05-22 MX MXPA04012523A patent/MXPA04012523A/en active IP Right Grant
- 2003-05-22 WO PCT/EP2003/005468 patent/WO2004000732A1/en not_active Application Discontinuation
- 2003-05-22 BR BR0311779-0A patent/BR0311779A/en not_active IP Right Cessation
- 2003-05-22 PL PL375198A patent/PL212324B1/en unknown
- 2003-05-22 CN CNB038140489A patent/CN1331762C/en not_active Expired - Fee Related
- 2003-06-17 MY MYPI20032249A patent/MY130646A/en unknown
- 2003-06-17 AR ARP030102133A patent/AR039681A1/en not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4714546A (en) * | 1986-02-10 | 1987-12-22 | Newport Filters, Inc. | Potable water filter |
US5308482A (en) * | 1988-02-29 | 1994-05-03 | Pre-Mac Kent Ltd. | Portable water-purifying devices |
US5061367A (en) * | 1989-10-13 | 1991-10-29 | Ametek, Inc. | Water purifying filter device |
US5562824A (en) * | 1994-10-12 | 1996-10-08 | Wtc/Ecomaster Corporation | Gravity water purifier |
US5897770A (en) * | 1997-10-23 | 1999-04-27 | Plymouth Products, Inc. | Center core cartridge feeder insert |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0578512B1 (en) * | 1992-07-09 | 1998-11-11 | Varian Associates, Inc. | Single crystal field emission device |
US7441665B2 (en) | 2003-10-01 | 2008-10-28 | Halosource, Inc. | Water purification cartridge |
CN100556821C (en) * | 2004-03-19 | 2009-11-04 | 荷兰联合利华有限公司 | Water purification system |
WO2005095284A1 (en) * | 2004-03-19 | 2005-10-13 | Unilever N.V. | Water purification system |
US8167141B2 (en) | 2004-06-30 | 2012-05-01 | Brita Lp | Gravity flow filter |
US8878723B2 (en) | 2005-06-13 | 2014-11-04 | Nokia Corporation | Supporting an assisted satellite based positioning |
WO2006134414A1 (en) | 2005-06-13 | 2006-12-21 | Nokia Corporation | Supporting an assisted satellite based positioning |
US7701387B2 (en) | 2005-06-13 | 2010-04-20 | Nokia Corporation | Supporting an assisted satellite based positioning |
US8077084B2 (en) | 2005-06-13 | 2011-12-13 | Nokia Coporation | Supporting an assisted satellite based positioning |
WO2007000238A1 (en) * | 2005-06-29 | 2007-01-04 | Unilever N.V. | Device for dispensing a unit-dose of disinfecting agent |
USD647595S1 (en) | 2007-09-20 | 2011-10-25 | Omnipure Filter Company, Inc. | Filter block for liquid filtration |
WO2010034687A1 (en) * | 2008-09-23 | 2010-04-01 | Unilever Nv | Water purification device |
EA018941B1 (en) * | 2008-09-23 | 2013-11-29 | Юнилевер Нв | Water purification device |
EP2184263A1 (en) | 2008-11-06 | 2010-05-12 | Unilever N.V. | Water purification device |
EP2189421A1 (en) | 2008-11-24 | 2010-05-26 | Unilever N.V. | A total mass flow meter and a water purification device |
WO2010057809A1 (en) * | 2008-11-24 | 2010-05-27 | Unilever Nv | A total mass flow meter and a water purification device |
EP2226108A1 (en) | 2009-01-30 | 2010-09-08 | Unilever N.V. | A filter |
WO2010086079A2 (en) | 2009-01-30 | 2010-08-05 | Unilever Nv | A filter |
WO2012025343A1 (en) | 2010-08-24 | 2012-03-01 | Unilever Nv | Water purification device comprising a gravity- fed filter |
WO2012059301A1 (en) | 2010-11-01 | 2012-05-10 | Unilever Nv | A residence time chamber |
WO2013053627A1 (en) | 2011-10-10 | 2013-04-18 | Unilever N.V. | A faucet mounted liquid fortificant dosing device and dispension method |
US10035131B2 (en) | 2011-11-24 | 2018-07-31 | Indian Institute Of Technology | Multilayer organic-templated-boehmite-nanoarchitecture for water purification |
US10041925B2 (en) | 2012-04-17 | 2018-08-07 | Indian Institute Of Technology | Detection of quantity of water flow using quantum clusters |
WO2014095344A1 (en) | 2012-12-20 | 2014-06-26 | Unilever N.V. | A tablet composition for an automatic shut off mechanism |
Also Published As
Publication number | Publication date |
---|---|
MY130646A (en) | 2007-07-31 |
CN1662449A (en) | 2005-08-31 |
RU2344085C2 (en) | 2009-01-20 |
PL375198A1 (en) | 2005-11-28 |
BR0311779A (en) | 2005-03-08 |
AU2003240707A1 (en) | 2004-01-06 |
RU2005101082A (en) | 2005-07-10 |
CN1331762C (en) | 2007-08-15 |
PL212324B1 (en) | 2012-09-28 |
MXPA04012523A (en) | 2005-02-17 |
AR039681A1 (en) | 2005-03-09 |
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