WO2011147656A1 - Dispositif de purification de l'eau - Google Patents

Dispositif de purification de l'eau Download PDF

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Publication number
WO2011147656A1
WO2011147656A1 PCT/EP2011/056693 EP2011056693W WO2011147656A1 WO 2011147656 A1 WO2011147656 A1 WO 2011147656A1 EP 2011056693 W EP2011056693 W EP 2011056693W WO 2011147656 A1 WO2011147656 A1 WO 2011147656A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
membrane
purification device
water purification
filtration
Prior art date
Application number
PCT/EP2011/056693
Other languages
English (en)
Inventor
Suresh Murigeppa Nadakatti
Abhinandan Narendran
Original Assignee
Unilever Nv
Unilever Plc
Hindustan Unilever Limited
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 Unilever Nv, Unilever Plc, Hindustan Unilever Limited filed Critical Unilever Nv
Publication of WO2011147656A1 publication Critical patent/WO2011147656A1/fr

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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
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C02F1/003—Processes for the treatment of water whereby the filtration technique is of importance using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices
    • 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
    • B01D63/10—Spiral-wound membrane modules
    • 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
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • 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
    • B01D2311/26—Further operations combined with membrane separation processes
    • B01D2311/2626—Absorption or adsorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/40—Adsorbents within the flow path
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/006—Cartridges
    • 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

Definitions

  • the present invention relates to an inline or online water purification device for making water suitable for human
  • the present invention relates to a water
  • the invention has been developed primarily for use in drinking water
  • WHO For water to be microbially safe, WHO recommends 6 log removal of bacteria, 4 log removal of viruses and 3 log removal of cysts.
  • chemical disinfection e.g. by contacting with halogen/chlorine
  • UV radiation-based disinfection e.g. by exposure to ultraviolet radiation
  • Membranes are effective in removing suspended particles from water as well as microorganisms such as bacteria, viruses and cysts. Generally there are two types of membranes used for the purpose of effective removal of suspended particles as well as
  • microorganisms such as bacteria, viruses and cysts from water viz. ultrafiltration (UF) membrane and reverse osmosis (RO) membrane. Both the membranes are capable of effective removal of microorganisms from water.
  • UF membrane ultrafiltration
  • RO membranes require more inlet pressure than UF membranes.
  • RO membranes are also capable of reducing total dissolved solids (TDS) of water, which makes it a suitable process for water purification where water has high TDS. High TDS water can have a detrimental effect on health.
  • ultrafiltration are also known. These systems are too complex to be operated by a consumer for domestic purpose and also these are relatively expensive. So there is a need for a method and apparatus for removing microorganisms including bacteria, viruses and cysts that is convenient to use with an efficient rate of filtration.
  • Fouling of ultrafiltration membranes is one of the key issues associated with using the technology for water purification. Fouling results in reduced flow of water through the membrane. Fouling of an ultrafiltration membrane is primarily due to suspended particles and dissolved organic matter. A prefilter is generally used before the filtration through an
  • a prefilter which is highly efficient in removing suspended particles, reduces the fouling of the ultrafiltration membrane and also the number of interventions but the prefilter itself gets clogged resulting in the reduction of flow rate and ultimately the choking of the prefilter.
  • RO membranes Water purification using RO membranes is also quite well known. Filtration methods and apparatus based on RO membranes need an efficient method for removing suspended particulates, organics etc. so that there will be less load on the RO membrane thereby increasing the life of the membrane.
  • One of the problems associated with currently available water filtration devices using the RO process is that either the life of the membrane is too low or it uses a number of different stages to reduce the load on the RO membrane.
  • US2009008318 discloses a modular filter system which is provided with one or more modules that can be interchangeable, depending upon the specific application or specific health or environmental issue presented.
  • Disclosed combinations can include one or more of any of the following modules in any relative position to one another: (a) a microbiological contaminant mitigation module, preferably in the form of an inverted u-shaped hollow fiber filter module wherein the fibers have ends potted on the downstream side and that consists essentially of hydrophilic fibers for water filtration with a small amount of hydrophobic fibers for venting of entrapped air; (b) a first chemical mitigation module, preferably in the form of an adsorption module comprising carbon or the combination of carbon and a deionization resin; and (c) a second chemical mitigation module, preferably in the form of a deionization resin module.
  • Modules including a carbon bed or a resin bed may be equipped with a pair of hydrophobic foam bed restraints that apply opposing
  • WO2008/028734 (HomeFlow Switzerland Distribution, 2005), discloses reliable filtration of particulate solids especially cysts and suspended solids in water, giving a high filtration flow rate, and which is effective for extended periods of time as compared to similar filters of the prior art using a filter comprising layers of filtration media comprising a non-pleated layer and a pleated layer but the maximum amount of cyst that could be removed was limited viz. the log removal of cyst, when the filter was new, was in the range of 1.8 to 3.6 without compromising on the flow rate. However, the cyst removal was found to drop to less than 3 log after some use.
  • the main limitation of this prior art is that it does not remove bacteria and viruses from water which will not make it microbiologically safe for consumption.
  • a filter comprising a carbon block especially of an annular cylindrical shape enveloped with spirally wound layer of non-pleated fabric enveloped with spirally wound layer of pleated fabric that ensures reliable filtration of particulate solids including cysts while giving a high filtration flow rate and longer life. It is particularly preferred that the carbon block is of annular cylindrical shape.
  • the water treatment system may include two prefliters, for example, both a rriul.ti-la.yer nonwoven prefilter and a. pleated fabric prefilter.
  • the microbiological interception filter includes carbon particles and a binder, and the carbon particles have a mean particle diameter ranging from about 60 microns to about 80 microns and with a particle size distribution in which no more than, about 10 percent by weight of the particles are larger than about 140 mesh and no more than about 10 percent by weight are smaller than about 500 mesh. This refers only to a prefliter and does not have an ultrafiltration membrane. Using this type of water treatment system one will not be able to achieve 4 log reduction in viruses from the water to be
  • interception filter is between 60 microns to about 80 microns the flow rate through the filter will be very low. To use this system with an ultrafiltration membrane use of a pump would be essential to achieve the required flow rate.
  • WO20070105 9 discloses a house hold reverse osmosis based drinking water purifier having controlled natural mineral content in purified water. This system essentially requires the use of a pump as it is reverse osmosis based purification and will not function at pressures in the range 5- 20 psi. As the system discloses a simple sediment filter and a carbon filter it will not be very efficient and the number of interventions will be many.
  • WO2003068689 Innova Pure Water Inc., 2003), discloses a portable filtration assembly that includes a housing containing a sub-micron filter disposed, in. the housing having hydrophilic sub-micron rated membrane filter elements.
  • the sub-micron filter is configured to effect a six log reduction of bacteria (99.9999 percent) and a. four log reduction of protozoa (99.99 percent) at a. flow rate between 10-30 mL/sec requiring a pressure of 1.5-10 psi .
  • the present inventors have now been able to design a filtration system that comprises a filtration unit comprising a carbon block along with a non-pleated layer and a pleated layer of fabric and a filtration membrane unit and provides water that is microbiologically safe in respect of bacteria, viruses and cysts and also free of organics, dissolved salts and other particulates. This provides flexibility of flow rate and pressure of input water.
  • the water purification device comprises a filtration unit comprising a carbon block along with a non-pleated layer and a pleated layer of fabric and a filtration membrane unit and provides water that is microbiologically safe in respect of bacteria, viruses and cysts and also free of organics, dissolved salts and other particulates. This provides flexibility of flow rate and pressure of input water.
  • the water purification device comprises a filtration unit comprising a carbon block along with a non-pleated layer and a pleated layer of fabric and a filtration membrane unit and provides water that is microbiologically safe in respect of bacteria, viruses and cysts
  • One of the objects of the present invention is to overcome or ameliorate at least one of the disadvantages of the prior art or to provide a useful alternative.
  • Another object of the invention is to provide an inline water purification device with very few interventions.
  • the present invention provides a water
  • purification device comprising:
  • a filtration unit including a carbon block enveloped with a spirally wound layer of non-pleated fabric which in turn is enveloped with spirally wound layer of pleated fabric, encased in a housing having an inlet and an outlet and ii. a filtration membrane in series and in fluid
  • filtration membrane is a reverse osmosis
  • the invention provides a method of filtering water comprising passing water successively through a
  • filtration unit including a spirally wound layer of non-pleated fabric enveloped with spirally wound layer of pleated fabric comprising a carbon block and then through a filtration
  • the membrane unit wherein the filtration unit is connected to a faucet and the water passing into the filtration unit is at an inline pressure from 5 to 20 psig.
  • the invention provides the use of a device according to the invention for 6 log removal of bacteria, 4 log removal of viruses and 3 log removal of cysts from water over 15000 litres of water without the requirement of any
  • a water purification device comprising:
  • a filtration unit including a carbon block enveloped with a spirally wound layer of non-pleated fabric which in turn is enveloped with spirally wound layer of pleated fabric, encased in a housing having an inlet and an outlet and ii.a filtration membrane in series and in fluid
  • filtration membrane is a reverse osmosis
  • the filtration unit according to the present invention requires a spirally wound non-pleated layer of fabric to first overlay the carbon block.
  • fabric is meant a woven, knitted or non- woven fabric.
  • the fabric may be made of natural fibers or material or may be of synthetic origin.
  • Preferred fabric is non-woven.
  • Preferred material of the fabric is synthetic preferably polymeric. Suitable polymeric materials of construction of the fabric are cotton, polyester,
  • the average pore size of the non- pleated fabric is preferably in the range of 1 to 400
  • the fabric forming the non-pleated layers has a thickness preferably in the range of 1 to 10 mm, more preferably in the range of 2 to 6 mm.
  • the number of spiral windings of non-pleated layers is preferably in the range of 1 to 10, more preferably in the range of 1 to 7.
  • the total thickness of the spirally wound layers of non-pleated fabric is preferably from 1 to 30 mm more preferably 2 to 20 mm.
  • the total surface area of non-pleated layer is preferably from 100 to 2500 cm 2 more preferably from 200 to 1500 cm 2 .
  • the non-pleated fabric has zeta potential preferably greater than -40 mV, more preferably greater than -30 mV. Zeta
  • Zeta Potential is the electrical potential that exists at the "shear plane" of a particle, which is some small distance from its surface.
  • Zeta Potential is derived from measuring the mobility distribution of a dispersion of charged particles as they are subjected to an electric field. Mobility is defined as the velocity of a particle per electric field unit and is measured by applying an electric field to the dispersion of particles and measuring their average velocity.
  • the non-pleated fabric has specific liquid permeability
  • the permeability is defined as the volumetric flow rate of liquid passed through a unit surface area of fabric per unit time at a constant unit differential pressure of water.
  • the intrinsic permeability also called the specific
  • permeability or absolute permeability of a fabric is a characteristic feature of the fabric structure and represents the void capacity through which a fluid can flow.
  • the specific liquid permeability k is defined by Darcy' s law as:
  • q volumetric flow rate of the fluid in a unit flow area (m/s)
  • k is the specific permeability (m 2 )
  • dp is the
  • ⁇ is the liquid viscosity (Pa.s)
  • the non-pleated fabric has surface porosity preferably less than 20%, more preferably less than 15% and most preferably less than 12%.
  • Surface porosity is defined as the ratio of voids in the plane cross section of the porous medium to the total area of cross section.
  • the invention requires that the pleated fabric envelopes the non-pleated layers.
  • the filter of the invention comprises a carbon block which is enveloped with spirally wound layer of non-pleated fabric enveloped with spirally wound layer of pleated fabric. It is preferred that the filter comprises multiple layers of the non- pleated fabric.
  • the carbon block used in the filter of invention comprises activated carbon particles bound together with a polymeric binder.
  • Activated carbon particles are preferably selected from one or more of bituminous coal, coconut shell, wood and
  • the activated carbon preferably has an Iodine number greater than 800, more preferably greater than 1000.
  • the activated carbon particles are in the size range of 5 to 300 mesh, more preferably in the size range of 16 to 200 mesh and most preferably in the size range of 30 to 200 mesh.
  • the activated carbon particles in carbon block are bonded to each other using a polymeric binder.
  • Polymeric binders having a Melt Flow Rate (MFR) of less than 5 g/10 minutes are further more preferred.
  • the binder material preferably has an MFR of less than 2g/10 minutes, more preferably less than 1 g/ 10 minutes. Optimally the MFR is near zero.
  • the melt-flow rate (MFR) is measured using ASTM D 1238 (ISO 1133) test where the tests are done at 190 oC at 15 kg load. The amount of polymer collected after a specific interval is weighed and normalized to the number of grams that would have been extruded in 10 minutes: melt flow rate is expressed in grams per reference time.
  • the binder is preferably a thermoplastic polymer.
  • Suitable examples include ultra high molecular weight polymer preferably polyethylene, polypropylene and combinations thereof, which have these low MFR values.
  • the molecular weight is preferably in the range of 10 s to 10 9 g/mole.
  • Binders of this class are commercially available under the trade names HOSTALEN from Tycona GMBH, GUR, Sunfine (from Asahi, Japan) , Hizex (from Mitsubishi) and from Brasken Corp (Brazil) .
  • Other suitable binders include LDPE sold as Lupolen (from Basel Polyolefins) and LLDPE from Qunos (Australia) .
  • Bulk density of the binder used as per the invention is preferably less than or equal to 0.6 g/cm 3 , more preferably less than or equal to 0.5 g/cm 3 , and further more preferably less than or equal to 0.25 g/cm 3 .
  • the binder content can be measured by any known method and is preferably measured by
  • Thermo-gravimetric analysis The particle size of the polymeric binder is preferably in the range of 20 to 200 micrometers, more preferably in the range of 40 to 60 micrometers.
  • the weight ratio of polymeric binder to activated carbon particles is preferably in the range of 1:1 to 1:20, more preferably in the range of 1:2 to 1:10.
  • the carbon block is preferably in the shape of an annular cylinder, a dome, a hemisphere or a frustocone.
  • the annular cylindrical shape is more preferred. It is preferred that the shortest path length across the carbon block i.e. the shortest distance from the inlet surface where the water enters the carbon block to the outlet surface where the water exits the carbon block is from 5 to 50 mm, more preferably 10 to 30 mm.
  • the carbon block is preferably prepared by a process which comprises the following steps:
  • the mixing is carried out to prepare a uniform mix.
  • the mixing time is preferably from 0.5 to 30 minutes.
  • amount of water used in preparing the moist mixture is not more than 4 times the amount of particles, more preferably not more than 3 times the amount of particles.
  • the amount of water used is from 0.5 to 1.5 times the weight of the carbon
  • the binder is then added to the above mixture and is further mixed.
  • the most preferred mixer is sigma mixer.
  • the material in the mould before heating is preferably
  • Compaction pressure may be from 0 to 15 kg/cm 2 . Suitable compaction pressures are not more than 12 kg/cm 2 , preferably from 3 to 10 kg/cm 2 and most preferably from 4 to 8 kg/cm 2 .
  • the pressure is preferably applied using either a hydraulic press or a pneumatic press, more preferably a
  • the mould is usually made of aluminum, cast iron, steel or any material capable of withstanding temperatures exceeding 400°C.
  • a mould release agent is preferably coated on the inside surface of the mould.
  • the mould release agent is preferably selected from silicone oil or aluminum foil, or Teflon or any other commercially available mould release agent that has little or no adsorption onto the filter medium.
  • the mould is then heated to a temperature of 150°C to 350°C, preferably in the range of 200°C to 300°C.
  • the mould is kept heated for more than 60 minutes, preferably 90 to 300 minutes.
  • the mould is preferably heated in an oven using a non- convection, forced air or forced inert-gas convection oven.
  • the mould is then cooled and the moulded filter released from the mould.
  • the present invention requires the use of a filtration membrane following the filtration unit.
  • the filtration membrane used can either be an ultrafiltration membrane or a reverse osmosis membrane .
  • Ultrafiltration membranes can be manufactured in the form of a flat sheet, spiral or in the form of hollow fibres.
  • the hollow fibre form is particularly preferred for the present invention.
  • Ultrafiltration separates particles and microorganisms on the basis of their size. Size may be co related with molecular weight. The concept of molecular weight cut-off may be used to characterize the membranes.
  • the ultrafiltration hollow fibre membrane is characterized by a molecular weight cut-off of less than 100 kD and more
  • the ultrafiltration membrane is preferably a hollow fiber ultrafiltration membrane.
  • the material of construction of the hollow fiber is preferably a hollow fiber ultrafiltration membrane.
  • ultrafiltration membrane is polysulfone, polyvinylidene
  • the hollow fibre modules are selected such that the flow rate of output water should at least be 100 milliliters per minute, preferably between 200 milliliters per minute to 1 liter per minute .
  • the inline pressure of the water line should be in between 5 and 20 psig
  • the present invention provides an RO module following after the filtration unit.
  • the material of construction of the RO membrane is polysulfone, polyvinylidene fluoride (PDVF) , cellulose acetate and all other standard material. These RO modules are commercially available for industrial and domestic use.
  • the present invention uses these commercially available hollow fibre modules. RO membranes are made in a variety of configurations, with the two most common configurations being spiral-wound and a hollow-fiber.
  • the invention also provides a method of filtering water by the water purification device, comprising passing water
  • the output water from the filtration membrane unit is microbiologically safe and free from organic substances and particulates.
  • the device according to the present invention is capable of achieving 6 log removal of bacteria, 4 log removal of viruses and 3 log removal of cysts from the input water.
  • the device can either be used as a gravity fed device using a tank of stored water as input water to be fed into the
  • the water purification device consisted of a filtration unit encased in a housing and an ultrafiltration membrane module downstream. Water was first passed through the filtration unit then passed through the filtration membrane. In operation the water entering into the housing of the filtration unit first filled up the space between the housing and the filtration unit and then flowed radially through the filtration unit where it first passed through the pleated layer then the non-pleated layer and finally the carbon block. The water then filled up the space around the ultrafiltration membrane and by the pressure build up inside the module was pushed through the hollow fibers before it exits. Test of efficacy of the gravity fed water purification device:
  • Test water having 2 -5 ppm organics, 15 - 20 ppm particulates and -1200 ppm total dissolved solids was used to test the efficacy of the device.
  • the following filtration units along with the ultrafiltration membrane were used and the data on bacteria, virus and cyst removal efficiency, number of interventions to get the required flow rate through the
  • Example 1 The filtration unit had a cylindrical carbon block made of 78% powdered activated carbon of particle size 75 - 250 ym and 22% polyethylene binder.
  • the water exiting the filtration unit was passed through a 67 kDa Ultrafiltration (UF) membrane obtained from M/s Aquaplus, India. In this case, a more efficient filtration unit + UF membrane was used which is known in prior art.
  • UF Ultrafiltration
  • Example 2 The filtration unit was pleated fabric that had a thickness of 1.2 mm, weight of 78 grams and a total of 25 - 26 pleats.
  • the water exiting the filtration unit was passed through a 67 kDa Ultrafiltration (UF) membrane obtained from M/s Aquaplus, India. In this case a less efficient filtration unit + UF was used which is also a known technology.
  • UF Ultrafiltration
  • Example 3 The filtration unit had 3 parts. It had a central cylindrical carbon block made of 78% powdered activated carbon of particle size 75 - 250 ym and 22% polyethylene binder. The carbon block was covered by 2 layers of spirally wound fabric which was covered by a layer of pleated fabric. The spiral fabric had a thickness of 1.8 mm, surface area of ⁇ 1000 sq. cm and a total weight of about 50 grams. The pleated fabric had a thickness of 1.2 mm, weight of 78 grams and a total of 25 - 26 pleats. The flow of water was radially through the device where it first passed through the pleated layer, then the spiral layer and finally the carbon layer. The water exiting the filtration unit was passed through a 67 kDa Ultrafiltration (UF) membrane obtained from M/s Aquaplus, India. This was according to the present invention.
  • UF Ultrafiltration
  • Example 4 Filtration unit as described in Example 3 consisting of a central cylindrical carbon block made of 78% powdered activated carbon of particle size 75 - 250 ym and 22%
  • the carbon block was covered by 2 layers of spirally wound fabric which was covered by a layer of pleated fabric.
  • the spiral fabric had a thickness of 1.8 mm, surface area of ⁇ 1000 sq. cm and a total weight of about 50 grams.
  • the pleated fabric had a thickness of 1.2 mm, weight of 78 grams and a total of 25 - 26 pleats. The flow of water was radially through the device where it first passed through the pleated layer, then the spiral layer and finally the carbon layer, but no ultrafiltration membrane was present.
  • the filtration unit selected for use in the device of the present invention when used alone does not provide the required virus removal and will not be capable of removal of total dissolved solids. Thus the combination of this filtration unit with an ultrafiltration membrane will provide a device with good flow rate requiring minimal
  • the water purified using the device according to the invention will be microbiologically safe and will have a good taste, and large amount of water can be purified with minimal effort.
  • the water purification device consisted of a filtration unit upstream and an ultrafiltration membrane module downstream. Water was first passed through the filtration unit then passed through the filtration membrane. The filtration unit was connected to the faucet. The water fed into the device was ground water. It was found that more than 15000 L of water could be passed in the device according to the invention without the requirement of any intervention at the filtration membrane.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

La présente invention concerne un dispositif de purification de l'eau destiné à éliminer efficacement des particules, des produits organiques, des microorganismes et des sels dissous. Le dispositif de purification de l'eau comprend une unité de filtration comprenant une plaquette de carbone enveloppée d'une couche enroulée en spirale d'un tissu non-plissé qui a son tour est enveloppée d'une couche enroulée en spirale d'un tissu plissé, placée dans un boîtier présentant une entrée et une sortie et une membrane de filtration en série et en communication fluidique avec l'unité de filtration, l'eau sortant de l'unité de filtration circulant à travers la membrane de filtration. Le dispositif de purification de l'eau selon la présente invention est capable de filtrer 15 000 litres d'eau sans avoir besoin d'une quelconque intervention au niveau de la membrane.
PCT/EP2011/056693 2010-05-24 2011-04-28 Dispositif de purification de l'eau WO2011147656A1 (fr)

Applications Claiming Priority (2)

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IN1592MU2010 2010-05-24
IN1592/MUM/2010 2010-05-24

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000020093A1 (fr) * 1998-10-08 2000-04-13 Cuno Incorporated Unite de filtrage
WO2002036248A1 (fr) * 2000-10-26 2002-05-10 Prime Water Systems Gmbh Dispositif de filtration comportant un prefiltre cylindrique entourant une unite de filtration par membrane
JP2002331286A (ja) * 2001-05-10 2002-11-19 Toray Ind Inc 浄水器
WO2003068689A1 (fr) 2002-02-12 2003-08-21 Innova Pure Water Inc. Filtre biologique a cartouche d'hydratation en ligne
JP2006015199A (ja) * 2004-06-30 2006-01-19 Toto Ltd 水栓内蔵型浄水カートリッジ
WO2007010549A1 (fr) 2005-07-20 2007-01-25 Mahesh Gupta Purificateur d'eau de boisson domestique a osmose inverse
WO2008028734A1 (fr) 2006-09-07 2008-03-13 Unilever N.V. Filtre
US20080087596A1 (en) * 2006-10-13 2008-04-17 Filtrex Holdings Pte Ltd. Universal water purifier unit assembly device
US20090008318A1 (en) 2006-12-04 2009-01-08 Prismedical Corporation Modular Water Purification and Delivery System
US20090045106A1 (en) 2007-08-15 2009-02-19 Access Business Group International Llc Water treatment system

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000020093A1 (fr) * 1998-10-08 2000-04-13 Cuno Incorporated Unite de filtrage
WO2002036248A1 (fr) * 2000-10-26 2002-05-10 Prime Water Systems Gmbh Dispositif de filtration comportant un prefiltre cylindrique entourant une unite de filtration par membrane
JP2002331286A (ja) * 2001-05-10 2002-11-19 Toray Ind Inc 浄水器
WO2003068689A1 (fr) 2002-02-12 2003-08-21 Innova Pure Water Inc. Filtre biologique a cartouche d'hydratation en ligne
JP2006015199A (ja) * 2004-06-30 2006-01-19 Toto Ltd 水栓内蔵型浄水カートリッジ
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