WO1999033539A1 - Filtre purificateur d'eau - Google Patents

Filtre purificateur d'eau Download PDF

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Publication number
WO1999033539A1
WO1999033539A1 PCT/US1998/026317 US9826317W WO9933539A1 WO 1999033539 A1 WO1999033539 A1 WO 1999033539A1 US 9826317 W US9826317 W US 9826317W WO 9933539 A1 WO9933539 A1 WO 9933539A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
composition
filter
filter cartridge
absorbent granules
Prior art date
Application number
PCT/US1998/026317
Other languages
English (en)
Inventor
Judith Y. Ikawa
Original Assignee
The Clorox Company
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 The Clorox Company filed Critical The Clorox Company
Priority to AU18171/99A priority Critical patent/AU1817199A/en
Publication of WO1999033539A1 publication Critical patent/WO1999033539A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/18—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being cellulose or derivatives thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J47/00—Ion-exchange processes in general; Apparatus therefor
    • B01J47/02—Column or bed processes
    • B01J47/022—Column or bed processes characterised by the construction of the column or container
    • B01J47/024—Column or bed processes characterised by the construction of the column or container where the ion-exchangers are in a removable cartridge
    • 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
    • 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
    • C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
    • 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
    • C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
    • 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
    • C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
    • 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
    • C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
    • C02F1/505—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment by oligodynamic treatment
    • 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
    • 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
    • C02F2307/00—Location of water treatment or water treatment device
    • C02F2307/04—Location of water treatment or water treatment device as part of a pitcher or jug

Definitions

  • WATER PURIFICATION FILTER TECHNICAL FIELD This invention relates generally to the field of water purification, and particularly relates to methods, materials and devices for use in purifying water.
  • Activated carbon has been used for decades in water filters as a means of improving the quality of water by removing objectionable tastes and odors and particles such as dirt, rust, and sand.
  • Activated carbon filters are also capable of producing water free from microbial contamination for a period of time, until the buildup of organic material and concentration of microorganisms combine to foster growth and shedding of the microorganisms into the treated water.
  • filtration assemblies utilizing activated carbon remove many undesirable materials, such as chlorine, metals (e.g. iron, lead, copper, manganese and aluminum), and bacteria, the filtrates are not as effective against a broader range of metals and microorganisms.
  • Many activated carbon filters give unsatisfactory removal of total chlorine, trihalomethanes, total organic carbon, and certain metals.
  • Adsorbent materials have been used in conjunction with activated carbon filtering methods in attempts to further purify water. These materials cannot be easily integrated into a single filtration composition, however, since they present certain limitations with respect to compatibility limitations with other components of filter systems.
  • bentonite clays and attapulgite clays are well known in the art. Both bentonite clay and attapulgite clay are known to have exchangeable cations (Mg, Ca and NH 4 ) in their lattice structure that would be expected to interfere with the functioning of other components.
  • exchangeable cations Mg, Ca and NH 4
  • both attapulgite and bentonite clays develop negative charges, and would be expected to repulse rather than adsorb negatively charged ions due to forces between like charged materials.
  • compositions for use in purifying water are disclosed along with a methods for use of such compositions in the process of water purification. Also disclosed are structural embodiments for utilization of the composition in the practice of the methods.
  • Another object of the invention is to produce a water purification filter that will reduce the amount of metals and organic contaminants found in the purified product.
  • Another object of the invention is to produce a water purification filter that will reduce the amount of microorganisms in the purified product.
  • One advantage of this system is that it is able to increase the efficiency of removal of impurities compared to filters presently used in the art.
  • the invention features a composition for purifying water comprised of an effective amount of absorbent granules, an ion exchange resin and a biostatic-coated carbon material.
  • the invention features a composition for purifying water comprised of an effective amount of biocide-treated absorbent granules, an ion exchange resin, and a biostatic-coated carbon material.
  • One feature of the invention is a water filter cartridge comprised of a structure defining .an interior cavity having an upper inlet and a lower inlet through which water can pass and a filtration bed positioned within the cavity between the upper inlet and the lower inlet.
  • the filtration bed is comprised of an effective amount of absorbent granules, an ion exchange resin, .and a biostatic-coated carbon material.
  • Another feature of the invention is the use of a water filter cartridge in a water purifying device.
  • the water purifying device is comprised of a water filter cartridge, a top chamber connected to the device above the filter cartridge with .an opening at the bottom for transferal of water to the filter cartridge, a bottom chamber connected to the device below the filter cartridge having an opening for collecting treated water exiting the filter cartridge, and a side chamber adjacent to the filter cartridge and connected to the bottom chamber to access the treated water.
  • the invention features a water purifying device comprised of a water filter cartridge, a chamber containing the filter cartridge having an opening in the forward and back portions of the chamber for the passage of water, and a means for attachment of the back portion of the chamber to a water pressure system. The water is purified when the water pressure causes water to enter the back portion of the chamber, flow through the filter cartridge, and exit the chamber through the forward portion of the chamber, exposing the water to the materials in the filter devices.
  • Another feature of the invention provides a method for the treating water to remove metals and organic contaminants from the water.
  • the method comprises exposing the water to a filter containing biocide-treated absorbent granules, an ion exchange resin and a biostatic-coated carbon material, and providing a means for passing the water through the filter.
  • the exposure of the water to the filter will result in the adsorption of contaminants to the absorbent granules.
  • Another feature of the invention provides a method for treating water to inhibit growth of microorganisms in the filter.
  • the method comprises exposing the water to a filter containing biocide-treated absorbent granules, an ion exchange resin and a biostatic-coated carbon material, and providing a means for passing the water through the filter.
  • the exposure of the water to the filter will result in the killing or inhibition of microorganisms present in the untreated water.
  • Figures 1 A -and IB are two views of the water filter cartridge as it is placed in the cylindrical holding cup of the gravity-driven water device.
  • Figure 1 A is the filter cartridge as viewed from above the device.
  • Figure IB is a cross-sectional view illustrating the filter cartridge as it sits in the holding cup.
  • Figure 2 is a general side view of the gravity-driven water purification device.
  • Figure 3 is a general side view of the pressure-driven water purification device.
  • an "adsorbent granule” is a chemically inert particle of a material having a low or medium sorptive capacity.
  • the preferred sorptive capacity is approximately 0.85 ml/g water absorbency, 0.64 ml/g oil absorbency, with a corresponding attrition resistance of 99.0%
  • an "effective amount” refers to a sufficient amount of a material to achieve a desired result.
  • an "effective amount” may be sufficient material in a filter to reduce the bacterial content of water treated to below a certain desired concentration.
  • an "effective amount" of a material in a filter may reduce the concentration of a particular metal in the purified water product to below a certain concentration.
  • biocide or “biocidic” as used herein refers to any substance that inhibits the growth of microorganisms such as bacteria, molds, slimes, fungi, etc.
  • Biocides include, but .are not limited to, quaternary ammonium salts, halogen-releasing compounds, aldehyde derivatives, halogenated styrenes, thiocyanates, carbarnates, azo chlorides, and modified phenols.
  • the preferred biocide is magnesium hydroperoxyacetate (MPHA).
  • biostatic-coated in reference to the carbon material refers to a coating of the carbon material with a substance that suppresses the growth and colonization of microorganisms, and in particular bacteria, on the carbon material.
  • slurry refers to a particles suspended in an aqueous solution.
  • a “plant material slurry” refers to an aqueous suspension of insoluble plant material Plant material slurry may also include suspended filler substances.
  • Primary de-inked sludge is a slurry of waste material from recycled newsprint and other papers. Primary de-inked sludge normally has a content of between 40-90% plant fibers and 10-60% filler. De-inked paper sludge in its raw form is approximately 90% water, and may contain suspended filler substances.
  • a “filler substance” is a substance present in the slurry that affect parameters of the slurry such as color (e.g. dyes or titanium dioxide) or density (e.g. kaolin clay or barytes).
  • the filler substance does not significantly affect the substantially inert nature of the resulting absorbent granule.
  • incorporación in a filter means including as a functional element of a device or apparatus. Incorporation in a filter may be permanent, as in the case of a nonremovable filter cartridge in a disposable water purification device, or temporary, e.g. a replaceable filter cartridge in a permanent or semi-permanent water purification device.
  • the filtration composition contained within the filtration bed is comprised of an effective amount of absorbent granules, an ion exchange resin, and an activated carbon material.
  • the water is passed through the filtration composition to eliminate undesirable contaminants present in the water.
  • One aspect of the present invention comprises a single composition that is capable of removing numerous cont.amin.ants from the water with a single treatment.
  • the activated carbon functions to remove organic compounds of health concern and to remove undesirable contaminants that affect the taste and odor of the water.
  • the activated carbon can be coated with a biostatic agent, preferably zinc or copper, more preferably silver.
  • the carbon removes impurities by acting as an adsorbent; most organic materials, including natural, synthetic, disinfection by-products .and volatile organics. Taste, odor and color producing organic compounds are readily adsorbed by activated carbon.
  • Certain inorganic materials having adverse health effects, such as mercury, lead, arsenic, chlorine and chlorine by-products are also be removed by adsorption to activated carbon.
  • the silver coating releases silver ions into the water, not exceeding 50 ⁇ g/liter in effluent. The silver works as a biostatic agent to prevent the build-up of microorganisms on the activated carbon.
  • the ion exchange resin is a mixture of synthetic anion .and cation exchange resins. Water passed through the mixed bed of synthetic resins is deionized, since cations have been replaced by hydrogen ions and anions by hydroxyl ions. Water passed through such an ion exchange resin depleted of mineral contaminants, and if the efficiency of the ion exchange is very great the treated water will have a quality comparable with distilled water.
  • This exchanger has the advantage of producing water with resistance approximating theoretical perfection and a more balanced and consistent pH ranging between 7.0 to 7.5.
  • the absorbent granules used in the filtration composition are derived from any of a number of fibrous plant materials, including sugar beet slurry, sugar cane slurry, citrus pulp slurry, grain slurry, and potato slurry. These materials may be in a variety of forms, including primary sulfite pulp, secondary sulfite pulp, primary sulfate pulp, secondary sulfate pulp, paper sludge.
  • the adsorbent granules are derived from de-inked fiber sludge.
  • the composition of the filter in the preferred embodiment of the invention preferably contains
  • the adsorbent granule is treated with a biocide before being added to the water purifying composition.
  • the biocidic agent may either be incorporated into the granule during production of the granule, or the granule may be treated with a biocide subsequent to its production.
  • US Patent 5,019,564 is herein incorporated by reference to describe the methods by which the biocide is integrated with the granule.
  • the biocide used may be quaternary ammonium salts, halogen-releasing compounds, aldehyde derivatives, halogenated styrenes, thiocyanates, carbarnates, azo chlorides, or modified phenols.
  • the biocide is MPHA.
  • the adsorbent granules of the present invention are chemically neutral to a wide range of chemicals, and thus the biocides will retain much of their activity and be immobilized. Exposure to a granule treated with the biocidic agent will allow the water to be purified without releasing the biocide directly into the water. The potential need for a deactivator of the biocide is thus eliminated.
  • the composition of the present invention is contained within a filtration cartridge for easy use of the composition in the water purification process. Since the composition is contained within a single cartridge, it can easily and conveniently be replaced when the purifying capacity of the composition becomes exhausted. Alternatively, the cartridge may be an integral part of a filter device, in which case the entire device is replaced once the filtration composition has exhausted its efficacy.
  • the first embodiment of the water filter cartridge 1 is constructed to be removably inserted into a cylindrical holding cup 2. A more detailed view of the filter cartridge is shown in Figs. 1 A .and IB.
  • the filter cartridge is generally cylindrical in nature, and circular in cross-section (See Fig. 1 A), with the circumference of the cartridge being larger at the top of the cartridge than at the bottom.
  • a covering 3 for the upper inlet of water into the cartridge is constructed of a rigid material with slots 4 through which the water enters the filtration composition bed 5.
  • the slots in the inlet cover can vary in size depending on the desired rate of flow of the water through the filter cartridge.
  • the inlet cover slots 4 should be arranged such that it provides adequate flow-through of the water, but also allows the water sufficient contact time with the purification composition to allow the purification process to take place.
  • the filtration bed 5 is contained between the inlet cover and the filter cartridge bottom 6.
  • the filter cartridge bottom is constructed from a water permeable material to allow passage of the purified water pass.
  • the material is stainless steel mesh.
  • the second embodiment of the filter cartridge is a cartridge that is an integral part of the filtration device, i.e., it is permanently attached to the device.
  • a filter contains generally the same components as the filter described above.
  • the filtration cartridge would contain a covering for control of the inlet of water into the cartridge, a filtration composition bed, and a filter cartridge bottom.
  • the cartridge could be varied in shape, depending on the nature and use of the device.
  • the components of the filter cartridge are layered sequentially for treatment of the water.
  • the water would first be exposed to the biostatic activated carbon to remove suspended solids, organic matter, chlorine, etc.
  • the water would then be exposed to the anion and cation exchange resin as described in Example
  • the prior activated carbon treatment greatly reduces the chance of fouling during the ion exchange process.
  • the water would contact the adsorbent granules.
  • the adsorbent granules may either be biocide treated, or not, depending on the nature of the water to be purified. Interspersed filter composition bed
  • the components of the purifying composition in the filter cartridge are interspersed, allowing exposure to each of the purifying agents simultaneously.
  • Three filters are prepared using Biodac cellulosic granules (GranTek, Inc.).
  • adsorbent granules are soaked in a sterile water solution containing 10% magnesium hydroperoxyacetate (MPHA), briefly rinsed in deionized water to remove any unbound MPHA, and air dried.
  • MPHA magnesium hydroperoxyacetate
  • the filter sample is prepared using 4g of the 10% MPHA-treated granules in a first, bottom layer and 65g (approximately 130 ml) of a carbon-ion exchange resin (USA Lot 38-116-6, Drum #25).
  • the resin material contains approximately 160 ppm of silver as a biostatic agent. Filters are then exposed to ultra-sonic sealing and soaked in sterile water.
  • the filters are then used in travel canisters, which are sanitized with 220 ppm bleach and subjected to multiple rinses with sterile water prior to use.
  • the second filter is also prepared using Biodac cellulosic granules. Granules are soaked in a solution containing 5% MPHA dissolved in sterile water, briefly rinsed to remove excess MPHA, and air dried.
  • the filter sample is prepared using 13g of the 5% MPHA granules intermixed with 52g of carbon-ion exchange resin (USA Lot 38-116-6, Drum #25).
  • a third filter is prepared using 65g of the carbon-ion exchange resin. This filter is to serve as a control for determining the efficacy of the filters containing the MPHA-treated Biodac.
  • each filter in inhibiting microbiological organisms in filter effluent is determined by measuring levels of three bacteria: Pseudomonas aer ginosa (ATCC 15442), Pseudomonas aeruginosa ERC- 1 , .and Pseudomonas flour escens.
  • Non-sterile tap water is inoculated with a composite of the three bacteria to a concentration of approximately lxl0 4r /Ml of water.
  • 100 ml of the inoculated water is passed through each filter, and the effluent plated at a series of dilutions: 1 :1, 1 :10, 1 :100, and 1:1000.
  • the effluent is also plated onto sterile petri dishes containing 10 ml of R2A medium and grown for at least 10 hours at 37°C. This procedure will be repeated each day for seven consecutive days, and levels of cultured organisms determined for both the sterile and the inoculated water. After one week, a final rinse with sterile distilled water will be sampled to examine an internal build-up of bacteria will be determined.
  • the purification device 7 is generally cylindrical in shape, and is comprised of three interconnected chambers: a top chamber 8, into which untreated water is first placed for purification; a bottom chamber 9, which is the holding area for the purified water; and a side chamber 10, which provides access to the purified water without causing the water to flow back through the filter cartridge (Fig. 2).
  • the device is constructed from clear plastic or a similar material.
  • a cylindrical holding cup 2 is rigidly attached to the inside wall of the device between the top and bottom chambers. The cylindrical holding cup defines the boundary between the top chamber and the bottom chamber, and at least in part defines the inside wall of the side chamber.
  • a filter cartridge 1 is designed as an insert that is removably inserted in the cylindrical holding cup.
  • the side chamber is oriented such that the treated water can be poured from the bottom chamber, into the side chamber, and through an open spout at the top of the side chamber.
  • a handle 11 for pouring is attached to the device opposite the side chamber to aid in removing the purified water by pouring.
  • Example 3 Pressure-driven purification device
  • the pressure-driven purification device is located linearly aligned and attached in line with a pressurized water supply (Fig. 3).
  • the device of this invention can be installed generally in stationary water purification situations but can also be adapted for portable use.
  • the device can be conveniently installed, for example, in a kitchen sink faucet with an easy interchange of the entire device once its purifying capabilities have been exhausted.
  • the purification device 12 is comprised of a cylindrical pipe-like housing 13 that is made of a rigid material, preferably stainless steel.
  • the housing contains a permanently attached filtration cartridge 14.
  • the filtration cartridge is comprised of: a covering 15 for the upper inlet of water having slots to control the flow of the water into the filter; a filtration composition bed 16 containing the components of the filtration composition; and a covering for the outflow of the purified water 17.
  • the filter cartridge bottom is constructed from a water permeable material to allow passage of the purified water pass.
  • the material is stainless steel mesh.
  • the back portion of the housing is rigidly connected to an attachment means 18 for removably attaching an inlet tube 19 to the housing.
  • the attachment means tapers to a thinner opening just smaller th.an the circumference of the inlet tube.
  • the inlet tube 19 is connected to the tapered end of the attachment means, and can be easily assembled and disassembled from the water supply without the need of a tool at the time of replacement of the filtration cartridge.
  • the end of the inlet tubing opposite the filter device 20 is connected to a pressurized water supply, such as a sink faucet. This provides the means by which the water is forced through the filtration device.
  • the inlet tubing is preferably made from a flexible material, such as rubber.
  • the flow through the inlet tubing can be controlled through an inlet valve 23 located on the attachment means.
  • the front portion of the housing is connected to a long outlet tubing 21 that serves
  • the outlet tubing is preferably made from a flexible material, such as rubber.
  • Such tubing is perm-anently attached to the filter device by a exit piece 22 that connects to the housing, and tapers to the point where the outlet tubing connects to the device.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Water Treatment By Sorption (AREA)

Abstract

La présente invention concerne une composition, destinée à la purification d'eau, et constituée de composants qui éliminent effectivement de l'eau un large spectre de contaminants. L'invention est particulièrement utile dans la mesure où la durée de vie effective des filtres à eau qui contiennent la composition est accrue par rapport à celle obtenue avec les compositions actuellement disponibles. La composition est constituée d'une quantité suffisante de granules d'absorbant, d'une résine échangeuse d'ions et d'un matériau à base de carbone revêtu d'un agent biostatique. L'invention concerne également des éléments structurels permettant l'utilisation de la composition, ainsi que les procédés de traitement de l'eau avec cette composition.
PCT/US1998/026317 1997-12-30 1998-12-11 Filtre purificateur d'eau WO1999033539A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU18171/99A AU1817199A (en) 1997-12-30 1998-12-11 Water purification filter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US125097A 1997-12-30 1997-12-30
US09/001,250 1997-12-30

Publications (1)

Publication Number Publication Date
WO1999033539A1 true WO1999033539A1 (fr) 1999-07-08

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AU (1) AU1817199A (fr)
WO (1) WO1999033539A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002083266A2 (fr) * 2001-04-11 2002-10-24 The Procter & Gamble Company Filtres et materiaux filtrants destines a l'elimination de microorganismes et processus d'utilisation correspondants
WO2005019115A1 (fr) * 2003-08-19 2005-03-03 Pur Water Purification Products, Inc. Dispositif de filtration d'eau
CN103799812A (zh) * 2013-12-20 2014-05-21 成都佳美嘉科技有限公司 加压助力式净水杯
EP3418259A3 (fr) * 2017-06-22 2019-03-20 Hamilton Sundstrand Corporation Système de traitement de l'eau avec barrière halogène passive
CN110143687A (zh) * 2019-04-19 2019-08-20 浙江双林环境股份有限公司 一种具有净水功能的农村饮用水水箱及其安装方法

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Publication number Priority date Publication date Assignee Title
US4741828A (en) * 1985-06-27 1988-05-03 Alhaeuser Erich Filter cartridge for the improvement of the quality of drinking water
US4969996A (en) * 1988-03-26 1990-11-13 Brita Wasser-Filter-Systeme Gmbh Water purification device with an intake funnel
US5019564A (en) * 1986-03-31 1991-05-28 Edward Lowe Industries, Inc. Non-clay agricultural granule
US5071587A (en) * 1990-05-31 1991-12-10 Aquatechnica, Inc. Composition and method for purifying water
EP0496905A1 (fr) * 1991-01-28 1992-08-05 Rhone-Poulenc Chimie Lignosufonates pour combattre les dépôts mucilagineux dans les installations à circuit d'eau, procede de preparation et leur utilisation
US5552057A (en) * 1993-06-01 1996-09-03 Hughes; Doug Water-purifying device
US5656037A (en) * 1995-12-28 1997-08-12 The United States Of America As Represented By The Secretary Of Agriculture Reaction products of magnesium acetate and hydrogen peroxide for imparting antibacterial activity to fibrous substrates

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4741828A (en) * 1985-06-27 1988-05-03 Alhaeuser Erich Filter cartridge for the improvement of the quality of drinking water
US5019564A (en) * 1986-03-31 1991-05-28 Edward Lowe Industries, Inc. Non-clay agricultural granule
US4969996A (en) * 1988-03-26 1990-11-13 Brita Wasser-Filter-Systeme Gmbh Water purification device with an intake funnel
US5071587A (en) * 1990-05-31 1991-12-10 Aquatechnica, Inc. Composition and method for purifying water
EP0496905A1 (fr) * 1991-01-28 1992-08-05 Rhone-Poulenc Chimie Lignosufonates pour combattre les dépôts mucilagineux dans les installations à circuit d'eau, procede de preparation et leur utilisation
US5552057A (en) * 1993-06-01 1996-09-03 Hughes; Doug Water-purifying device
US5656037A (en) * 1995-12-28 1997-08-12 The United States Of America As Represented By The Secretary Of Agriculture Reaction products of magnesium acetate and hydrogen peroxide for imparting antibacterial activity to fibrous substrates

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002083266A2 (fr) * 2001-04-11 2002-10-24 The Procter & Gamble Company Filtres et materiaux filtrants destines a l'elimination de microorganismes et processus d'utilisation correspondants
WO2002083266A3 (fr) * 2001-04-11 2003-04-10 Procter & Gamble Filtres et materiaux filtrants destines a l'elimination de microorganismes et processus d'utilisation correspondants
WO2005019115A1 (fr) * 2003-08-19 2005-03-03 Pur Water Purification Products, Inc. Dispositif de filtration d'eau
CN103799812A (zh) * 2013-12-20 2014-05-21 成都佳美嘉科技有限公司 加压助力式净水杯
EP3418259A3 (fr) * 2017-06-22 2019-03-20 Hamilton Sundstrand Corporation Système de traitement de l'eau avec barrière halogène passive
US10427952B2 (en) 2017-06-22 2019-10-01 Hamilton Sundstrand Corporation Water treatment system with passive halogen barrier
CN110143687A (zh) * 2019-04-19 2019-08-20 浙江双林环境股份有限公司 一种具有净水功能的农村饮用水水箱及其安装方法

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