WO2015063147A1 - Procédé de purification d'eau - Google Patents

Procédé de purification d'eau Download PDF

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Publication number
WO2015063147A1
WO2015063147A1 PCT/EP2014/073211 EP2014073211W WO2015063147A1 WO 2015063147 A1 WO2015063147 A1 WO 2015063147A1 EP 2014073211 W EP2014073211 W EP 2014073211W WO 2015063147 A1 WO2015063147 A1 WO 2015063147A1
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WIPO (PCT)
Prior art keywords
stream
oxo
treated effluent
phosphate
unit
Prior art date
Application number
PCT/EP2014/073211
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English (en)
Inventor
Monica PARAVIDINO
Lute Broens
Wilhelmus Johannes Cornelis VAN DE VEN
Original Assignee
Biaqua B.V.
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Publication of WO2015063147A1 publication Critical patent/WO2015063147A1/fr

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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/025—Reverse osmosis; Hyperfiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/145—Ultrafiltration
    • 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
    • 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
    • C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • 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
    • C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
    • 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
    • C02F1/44—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
    • C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/006—Radioactive compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/103—Arsenic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/105—Phosphorus compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/106—Selenium compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/108—Boron compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/06—Contaminated groundwater or leachate
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/08—Seawater, e.g. for desalination
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/06—Controlling or monitoring parameters in water treatment pH
    • 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
    • C02F2303/16—Regeneration of sorbents, filters
    • 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
    • C02F2303/20—Prevention of biofouling
    • 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
    • C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/08—Nanoparticles or nanotubes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination
    • Y02A20/131—Reverse-osmosis

Definitions

  • the present invention related to methods and systems for the purification of water, in particular for the removal of phosphate from water, for example in desalination, the
  • RO Reverse osmosis
  • RO units remain highly sensitive to components in feed water streams , such as chemical and organic foulants and particulate matter, and to biofouling of the RO membrane .
  • the quality of input water is therefore a key parameter in the successful operation of a reverse osmosis unit and extensive pre-treatment is often required in order to avoid rapid flux decline and production losses
  • U11 rafi 11ration has been successfully used as a method of pre-treatment and has been shown to significantly reduce the requirement for chemical pre-treatment and to provide benefits especially during fluctuations in the input water quality, such as during storms and algal blooms ( ⁇ State-of-the-art of reverse osmosis desalination', Desalination, 216, (2007), 1076).
  • the ultrafiltration filtrate still contains dissolved salts and organics which can lead to problems, for example biofouling, scaling or adsorption of material onto the RO membrane surface.
  • a method of water purification comprising the steps of:
  • the feed water stream comprises phosphate
  • the oxo-anion adsorbent adsorbs phosphate, so that the concentration of phosphate in the treated effluent stream is lower than in the first permeate stream.
  • the method of water purification of the invention offers a number of advantages.
  • ultrafiltration and oxo-anion adsorbent prior to the reverse osmosis step offers significant reductions in biofouling and scaling and adsorption of material onto the RO membrane surface.
  • the method of the invention offers greater
  • problematic contaminant ions such as arsenate and borate
  • problematic contaminant ions would reduce the need for separate pre- or post-treatment steps and consequent chemical usage.
  • the treatment unit of the invention comprises an adsorbent that selectively removes oxo-anions.
  • the oxo-anion adsorbent comprises at least one iron oxide.
  • the term iron oxide is to be interpreted to encompass iron oxides, iron hydroxides, iron oxy-hydroxides , and related compounds.
  • the oxo-anion adsorbent comprises as iron (III) oxide, iron hydroxide or iron oxide hydroxide or related compounds.
  • the oxo-anion adsorbent comprises iron oxide micro- or nano-particles .
  • the oxo-anion adsorbent comprises ferritin .
  • the oxo-anion adsorbent comprises a lanthanum-based compound.
  • the oxo-anion adsorbent may be regenerated with a simple procedure.
  • the method additionally comprises the step of passing a regenerating solution through the treatment unit.
  • the regeneration solution is directed from the treatment unit to the
  • the ability to utilise the regeneration solution for cleaning the ultrafiltration unit offers efficiency and environmental benefits relating to reduction in the quantity of chemicals used.
  • the oxo-anion adsorbent is used to selectively adsorb phosphate.
  • one or more of arsenate, arsenite, borate, vanadate, silicate or uranium and selenium oxides are also removed. It will be understood by the skilled person that the adsorbent should be selective for removal of the desired contaminant phosphate oxo-anions over other ionic components of feed water, such as sodium chloride.
  • the concentration of phosphate oxo-anions in the treated effluent stream is lower than in the first permeate stream.
  • the concentration of phosphate in the treated effluent stream is lower than in the first permeate stream.
  • phosphate in the water stream entering a reverse osmosis unit can lead to significant reductions in biofouling.
  • the phosphate concentration in the treated effluent stream is ⁇ 5 ppb as phosphate.
  • the phosphate concentration in the treated effluent stream is ⁇ 1 ppb as phosphate.
  • the pH of the water stream entering the treatment unit may be adjusted to facilitate the adsorption of phosphate oxo- anions .
  • the first permeate stream has a pH > 6 upon entry into the treatment unit.
  • Figure 1 shows a schematic representation of a water
  • a water purification system 10 suitable for use in the purification of water for example desalination, the treatment of waste water,
  • potable water supplies or high quality process water from ground water, surface water, waste water effluent, brackish water or
  • a stream of phosphate-containing feed water 11 enters the water purification system 10.
  • the feed water is directed towards an ultrafiltration unit 12, whereby the feed water is filtered to produce a first permeate stream 13 and a waste stream 14 comprising material rejected by the
  • the feed water stream 11 may be treated before entering the ultrafiltration unit, for example by the addition of coagulants such as iron or aluminium salts, for example ferric chloride, ferric sulphate or aluminium sulphate, with or without additional organic components, such as polymers.
  • coagulants such as iron or aluminium salts, for example ferric chloride, ferric sulphate or aluminium sulphate
  • additional organic components such as polymers.
  • the of the feed water stream 11 may be also adjusted. Means for the addition of additives and for pH adjustment of the feed water stream may therefore be provided 15.
  • the feed water stream 11 may also be pre-filtered, for example using a mechanical screen, media filtration, etc.
  • the first permeate stream 13 is directed towards the treatment unit 16 which comprises a phosphate oxo-anion adsorbent.
  • the first permeate stream 13 is passed through the treatment unit 16 to produce a treated effluent stream 17.
  • the first permeate stream may be treated before entering the treatment unit, for example by the addition of an anti-scalant .
  • the pH of the first permeate stream may also be adjusted. Means for the addition of additives and for pH adjustment of the first permeate stream may therefore be provided 18.
  • Phosphate is selectively removed by the adsorbent.
  • Further anions which are additionally removed may include one or more of arsenate, arsenite, borate, vanadate, silicate and uranium and selenium oxides .
  • iron based adsorbents should be selected so that during operation no significant iron is released in the form of dissolved, fine or particulate matter.
  • the oxo- anion adsorbent requires fast kinetics of oxo-anion removal, for example consistent with a bed contact time of ⁇ 5 minutes.
  • the treatment unit may also comprise a material with io exchange properties, for example an ion exchange resin.
  • the ion exchange material may remove problematic ions and charge organics, for example humic acid which can cause fouling or scaling of RO membranes.
  • the oxo-anion adsorbent comprises iron oxide, e.g., in the form of iron oxide
  • the iron oxide particles may be immobilised on, embedded in, complexed with, or attached to a suitable carrier material, such as an ion exchange resin, or another suitable organic or inorganic carrier material .
  • Suitable adsorbents are composed of or contain iron oxides , such as iron (III) oxide, iron hydroxides, iron oxide hydroxide and may be indicated as granular ferric oxides, hydrous ferric oxides (such as
  • ferrihydrites include commercial products such Bayoxide ® E33 or Lewatit® F036.
  • iron oxides may contain other minerals or additives, be immobilised or blended with carriers such as sand, anthracite, other mineral particles, polymeric beads, ion exchange beads, or other organic or inorganic materials .
  • Immobilisation may be in the form of nano- or microparticles .
  • the iron oxide particles may also be incorporated within a ferritin protein structure and in another embodiment of the invention the oxo-anion adsorbent comprises ferritin.
  • Ferritins are found in a wide variety of organisms as an iron storage protein and comprise a number of sub-units that can self- assemble into a roughly spherical protein nanocage. Two forms of ferritin have been found which are differentiated by the number of sub-units in the spherical structure. Maxi-ferritins are composed of twenty-four identical or homologous subunits and include classical ferritins and bacterioferritins .
  • Mini- ferritins form a cage-like structure similar to a maxi-ferritin but made up of twelve subunits and include the DNA-binding proteins from starved cells (Dps) which appear to arise only in bacteria and archaea.
  • Dps starved cells
  • Ferritin has the ability to oxidize ferrous iron and form a core of ferric iron within the nanocage and it has been shown that ferritin may be used to remove oxo- anions from water and achieve very low solute concentrations .
  • ferritins Techniques for expression and purification of ferritins are known to one skilled in the art, for example the production of recombinant ferritin from Pyrococcus furiosus is described in * Development of a Bionanotechnological Phosphate Removal System with Thermostable Ferritin' Biotechnology and
  • a suitable carrier material for example modified sand or other inorganic or organic carrier materials, including ion exchange resins.
  • Sand may be modified, for example, with APTES (3- arninopropyit riethoxysi lane) in order to provide surface functionality to enable cross-linking to the ferritin protein structure with an agent, such as glutaraldehyde .
  • the oxo-anion adsorbent utilises lanthanum based compounds .
  • Suitable adsorbents include lanthanum modified clays (for example PhosLock, as described in Applied Clay Science, Vol 46, Issue 4, Dec 2009, 369-375), lanthanum oxide nano-particles or trivalent lanthanum salts, such as lanthanum chloride or lanthanum sulphate in soluble form (for example as described in US Patent 3, 956, 118) .
  • the oxo-anion adsorbent may also comprise mixtures of lanthanum based compounds and at least one iron oxide or may comprise a lanthanum-iron complex.
  • the treatment unit may contain more than one layer of material, for example more than one layer of material in a filtration bed, or may comprise a series of filtration beds of the same or different materials.
  • the treatment unit may be run in up-flow or down-flow configurations.
  • the pH of the water stream entering the treatment unit may be adjusted to facilitate adsorption of phosphate oxo-anions.
  • the pH of the water stream entering the treatment unit is > 6 which facilitates the removal of phosphate. pH adjustment may also improve the process operation of the RO unit .
  • the treated effluent stream 17 is directed towards the reverse osmosis unit, whereby the treated effluent stream is filtered to produce a second permeate stream 20 and a waste stream 21 comprising material rejected by the reverse osmosis unit.
  • the treated effluent stream 17 may be further treated before entering the reverse osmosis unit for example by the addition of additives, such as coagulants.
  • additives such as coagulants.
  • the pH of the treated effluent stream 17 may be also adjusted. Means for the addition of additives and for pH adjustment of the treated effluent stream 17 may therefore be provided 22.
  • the water purification system 10 may additionally be provided with a filter element 23 through which the treated effluent stream 17 may be passed before entry into the reverse osmosis unit.
  • This additional filter element may be for example a cartridge filter,, such as a candle filter.
  • the water purification system 10 may also be provided with a means to store a volume of the treated effluent stream 17, for example a storage or buffer tank 24.
  • a means to store a volume of the treated effluent stream 17 for example a storage or buffer tank 24.
  • Storage of a volume of the treated effluent steam enables the reverse osmosis unit to be operated during cleaning of the ultrafiltration unit and / or regeneration of the oxo-anion adsorbent.
  • the volume of the storage means 24 is sufficient to enable the operation of the reverse osmosis unit 19 in a continuous manner .
  • the oxo-anion adsorbent is preferably capable of
  • regeneration with a simple procedure. This regeneration may be carried out in situ, or the adsorbent may be replaced and regeneration may be carried out onsite or offsite.
  • Regeneration may be carried out, for example by flushing the adsorbent with a suitable regeneration solution, such as an aqueous solution of sodium hydroxide and sodium chloride.
  • a suitable regeneration solution such as an aqueous solution of sodium hydroxide and sodium chloride.
  • the adsorbent may then be rinsed with an acidic solution with a pH ⁇ 6 to quickly neutralize the filter bed.
  • the ultrafiltration unit will require regular chemical cleaning.
  • the regeneration of the adsorbent may be integrated with the chemical cleaning, for example by flushing the adsorbent with a regeneration solution and using this solution to clean the ultrafiltration unit. This enables efficient operation of the water purification system and reduces chemical consumption.
  • the quantity of oxo-anion adsorbent in the treatment unit is preferably high enough so that adsorption capacity is not reached between chemical cleaning cycles of the ultrafiltration system.
  • the ultrafiltration unit 12 is cleaned with a solution which may be delivered to the
  • the ultrafiltration unit from a holding means 25, such as a storage vessel.
  • the solution is passed through the ultrafiltration unit and is removed as a waste stream 26.
  • the solution may also be used to regenerate the oxo-anion adsorbent in the treatment unit 16.
  • the solution may be used to regenerate the oxo-anion adsorbent in the treatment unit 16.
  • the solution may be used to
  • the solution may be passed through the treatment unit in a direction concurrent or countercurrent with the usual flow of water during operation.
  • the waste stream 26 may be passed through a chemical recovery unit to isolate chemicals using in the cleaning and / or regeneration process which may be returned to the holding means 25. If a combined oxo-anion adsorbent regeneration and ultrafiltration unit cleaning process is used the waste stream 26 may contain high concentrations of oxo-anions which can be sent for safe disposal or undergo further treatment stages. Variations of the embodiments and examples as described herein will be apparent to the skilled reader and are included within the scope of the invention.

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

Abstract

La présente invention concerne un procédé de purification d'eau comprenant les étapes suivantes : i) guidage d'un courant d'eau d'alimentation dans une unité d'ultrafiltration, et filtrage de l'eau d'alimentation pour produire un premier courant de perméat ; ii) guidage du premier courant de perméat dans une unité de traitement comprenant un adsorbant oxo-anion et passage du premier courant de perméat à travers l'unité de traitement pour produire un courant d'effluent traité ; iii) guidage du courant d'effluent traité dans une unité d'osmose inverse et filtrage du courant d'effluent traité pour produire un second courant de perméat, le courant d'eau d'alimentation comprenant du phosphate, et l'adsorbant oxo-anion adsorbant le phosphate, de sorte que la concentration en phosphate dans le courant d'effluent traité soit inférieure à celle du premier courant de perméat. La présente invention permet de réduire l'apparition de salissure biologique dans l'unité d'osmose inverse.
PCT/EP2014/073211 2013-10-29 2014-10-29 Procédé de purification d'eau WO2015063147A1 (fr)

Applications Claiming Priority (2)

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GB1319078.0 2013-10-29
GBGB1319078.0A GB201319078D0 (en) 2013-10-29 2013-10-29 Water purification systems

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015181206A1 (fr) * 2014-05-27 2015-12-03 Biaqua B.V. Procédé d'élimination de phosphate à partir de courants d'eau par l'intermédiaire d'un procédé intégré
FR3062849A1 (fr) * 2017-02-15 2018-08-17 IFP Energies Nouvelles Procede de traitement de l'eau par adsorption sur un materiau filtrant regenerable
EP3382293A1 (fr) * 2017-03-28 2018-10-03 Koninklijke Philips N.V. Prévention de la croissance microbienne dans un humidificateur par limitation des phosphates
IT201900020550A1 (it) * 2019-11-07 2021-05-07 Gajarda Srl Procedimento per la riattivazione degli Idrossidi Ferrici utilizzati per la rimozione dell’Arsenico dalle acque

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JP2011218267A (ja) * 2010-04-07 2011-11-04 Toray Ind Inc 水処理方法および水処理装置
DE102010043662A1 (de) * 2010-11-09 2012-05-10 Michael Eumann Brauereiabwasseraufbereitungsverfahren sowie Brauereiabwasseraufbereitungsvorrichtung

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Publication number Priority date Publication date Assignee Title
JP2011218267A (ja) * 2010-04-07 2011-11-04 Toray Ind Inc 水処理方法および水処理装置
DE102010043662A1 (de) * 2010-11-09 2012-05-10 Michael Eumann Brauereiabwasseraufbereitungsverfahren sowie Brauereiabwasseraufbereitungsvorrichtung

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015181206A1 (fr) * 2014-05-27 2015-12-03 Biaqua B.V. Procédé d'élimination de phosphate à partir de courants d'eau par l'intermédiaire d'un procédé intégré
FR3062849A1 (fr) * 2017-02-15 2018-08-17 IFP Energies Nouvelles Procede de traitement de l'eau par adsorption sur un materiau filtrant regenerable
EP3382293A1 (fr) * 2017-03-28 2018-10-03 Koninklijke Philips N.V. Prévention de la croissance microbienne dans un humidificateur par limitation des phosphates
WO2018178090A1 (fr) 2017-03-28 2018-10-04 Koninklijke Philips N.V. Prévention de la croissance microbienne dans un humidificateur par limitation des nutriments
CN110520677A (zh) * 2017-03-28 2019-11-29 皇家飞利浦有限公司 通过营养限制预防加湿器中的微生物生长
RU2770626C2 (ru) * 2017-03-28 2022-04-19 Конинклейке Филипс Н.В. Предотвращение микробного роста в увлажнителе за счет ограничения питательных веществ
US11686481B2 (en) 2017-03-28 2023-06-27 Koninklijke Philips N.V. Prevention of microbial growth in a humidifier through nutrient limitation
IT201900020550A1 (it) * 2019-11-07 2021-05-07 Gajarda Srl Procedimento per la riattivazione degli Idrossidi Ferrici utilizzati per la rimozione dell’Arsenico dalle acque

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