• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention provides a method of in-line water mineralization in which demineralized water is circulated in a channel within which enzymes are immobilized to catalyze the reaction of carbon dioxide and water to form bicarbonate, carbon dioxide is introduced into the channel, and a predetermined quantity of solid minerals, preferably calcium and / or magnesium carbonate, is introduced into the circulating water. The process makes it possible to accelerate the dissolution of carbon dioxide in the water which makes it possible to optimize the dissolution of minerals to mineralize the water in line, that is to say without stopping the circulation of the water. The invention also proposes a system making it possible to implement the method.
    公开号:BE1026873B1
    申请号:E20195240
    申请日:2019-04-11
    公开日:2020-07-13
    发明作者:Philippe Tob
    申请人:Aqvita Srl；
    IPC主号:
    专利说明:

    Inline carbonation and mineralization process of demineralized water. The invention lies in the field of (re-) mineralization of water. Some water purification or sanitation techniques include a demineralization step. This is particularly the case, for example, on an industrial scale, for the desalination of seawater, or on a domestic scale for the demineralization of city water.
    Water that has been, at least in part, purified of its minerals is usually slightly acidic, making it corrosive and in the long run can damage the pipes it runs through.
    It also has a very bland flavor which makes it unpleasant to consume.
    It is therefore common to remineralize desalinated or demineralized water, in particular with magnesium and calcium carbonates, in order to raise the pH and / or modify its flavor.
    Nevertheless, the low rate of dissolution of these minerals in water is a limiting factor and it is necessary to stir, for several hours, fine mineral powders in a volume of water to reach a determined concentration of calcium and / or magnesium carbonates. , concentration which nevertheless remains limited. This method is not industrially efficient, nor applicable to domestic appliances whose dimensions must remain limited. The concentrations of calcium and / or magnesium carbonates obtained by this method remain, moreover, much lower than that of mineral water.
    It has been demonstrated in Desalinisation 396, (2016) 39-47, that it is possible to improve the dissolution rate of magnesium and calcium carbonates by first acidifying the water with carbon dioxide (CO,) or sulfuric acid, the latter allowing to dissolve 8 to 9 times more minerals than with carbon dioxide. This difference is mainly due to the fact that a lower pH can be achieved with sulfuric acid, a strong acid, and with carbon dioxide, forming a weak acid when dissolved in water. This is also the consequence of the low rate of dissolution of carbon dioxide in water.
    However, it is not desirable, either industrially or in domestic installations, to use sulfuric acid, because of the well-known risks associated with its handling (burns, corrosion, etc.).
    It has therefore been deemed necessary by the Applicant to develop a process as well as a system allowing the instantaneous mineralization in line and in a controlled manner, of previously demineralized water, at least in part.
    Solution of the invention To this end, the present invention provides an instant process for in-line water mineralization according to which: demineralized water is circulated in a channel inside which enzymes are immobilized to catalyze the reaction of carbon dioxide and water to form bicarbonate - introducing carbon dioxide into the channel, and - introducing into the circulating water a predetermined amount of solid minerals, preferably calcium carbonate and / or of magnesium. The attributes "instant" and "online" mean that the water is constantly circulating along the canal and is not at any time stored in a reservoir to undergo a mineral processing or dissolution stage. The term “demineralized water” is understood here to mean water with a low mineral content or even devoid of minerals, and in particular of magnesium and calcium. The low mineral content can be obtained naturally, for example for spring water, or artificially, by desalination processes such as reverse osmosis, the use of resins, evaporation and recondensation. A low mineral content preferably corresponds to a dry mineral residue of less than 500 mg / L and more preferably of less than 100 mg / L.
    The channel in question generally designates a pipe with a water inlet and a water outlet between which water can circulate, that is to say have a calculable flow.
    Carbon dioxide can be introduced into the channel by bubbling carbon dioxide gas through it through the use of a conventional bubbler or through a membrane. Alternatively, the channel is permeable to carbon dioxide and impermeable to water over at least a part of its length and the carbon dioxide is introduced into the channel by applying carbon dioxide pressure to the outer wall of the channel. .
    The channel can for example be a pipe, the wall of which is a membrane permeable to carbon dioxide. It may also be a plurality of parallel bundles, such as, for example, hollow fibers whose walls are membranes permeable to carbon dioxide. This configuration has the advantage of increasing the contact surface between the water and the walls, that is to say with the pores allowing the adsorption of carbon dioxide in the water circulating in the channel, without water does leak out of the fiber, and with the enzymes immobilized inside the channel. The enzymes that catalyze the reaction of carbon dioxide and water to form carbonic acid and then bicarbonate are preferably carbonic anhydrase. This enzyme, of class EC 4.2.1.1, is well known to improve the rate of dissolution of CO in water but has never been used in combination with injection means of mineral powder, nor other means of dissolving minerals, to optimize their dissolution.
    The means for immobilizing enzymes within the channel are the conventional means for immobilizing enzymes on polymeric surfaces, well known to those skilled in the art.
    It may for example be an immobilization by grafting enzymes on the inner face of the wall / membrane or on beads or particles held inside the channel by filters or grids whose mesh allows passage. water but not beads / particles.
    The term "circulating water" refers here to the fact that there is no tank in which water would be immobilized while it is stirred with mineral powder.
    The method of the invention is instantaneous, online, and thus allows industrial implementation, for example downstream of a desalination unit, which is particularly advantageous, for example, for supplying a city water network.
    It also allows a domestic implementation, saving space.
    The lack of a mixing tank also limits the risk of bacterial growth in standing water.
    Preferably, a predetermined amount of solid minerals, preferably calcium and / or magnesium carbonate, is introduced into the circulating water by injecting a mineral powder or by circulating the water through a mineral bed.
    By solid minerals, it should be understood here that the water to be remineralized comes into contact with the mineral in its solid form, and not pre-dissolved in a solution.
    The channel of the invention can therefore be connected to a powder injector or include a mineral column.
    In the case of injection, the injected powder is a very fine or fluidized powder, composed of particles having diameters of the order of a few microns, for example 5 to 1000 microns, which have great fluidity and which can be measured. a volume, very similar to liquid solutions.
    These powders have the advantage of being packable in space-saving cartridges. Dosing of small amounts of powder, i.e. a few microliters is possible using, for example, technologies developed for laser 5 or 3D printing, where layers of powders are deposited. Those skilled in the art can nevertheless use any other suitable technology for the dosage of fine powders.
    These techniques allow the injection of a predetermined amount of powder, that is, an amount defined in advance in order to obtain an equally predetermined amount of dissolved minerals.
    In the case of the use of a mineral column, this comprises a bed of mineral granules or balls, the particle size of which may for example be between 0.5 and 4.5 mm.
    Advantageously, mineral beads are combined / mixed with beads onto which are grafted the enzymes catalyzing the reaction of carbon dioxide and water to form carbonic acid and then bicarbonate.
    The present invention also provides a system for implementing the method of the invention. This is a water remineralization system, at least partially demineralized, comprising a channel for circulating water from an inlet to an outlet along which are arranged: - means for introducing carbon dioxide carbon in the channel; - enzymes capable of catalyzing the reaction of carbon dioxide and water to form bicarbonate immobilized inside said channel, and - means for introducing a predetermined quantity of calcium carbonate and / or magnesium in solid form. Preferably, the means for introducing carbon dioxide into the channel comprise a wall permeable to carbon dioxide over at least a part of the length of the channel and means for applying a pressure of carbon dioxide to the outer face of said wall. permeable to carbon dioxide. The means for applying a pressure of carbon dioxide to the outer face of the wall permeable to carbon dioxide may comprise a hermetic chamber connected to an inlet of carbon dioxide under pressure and traversed by at least the part of the channel comprising the permeable wall. to carbon dioxide.
    Advantageously, a static mixer, for example a helical insert, making it possible to create a turbulence of the water which circulates therein is arranged at the outlet of the channel in order to optimize the mixing between the water, the dissolved carbon dioxide, and the added minerals.
    The means for introducing a predetermined quantity of calcium carbonate and / or magnesium are for example a powder injector and / or a mineral column.
    The powder injector may for example be a microdosing device which dispenses micro-volumes of powders, depending on the flow rate of the water passing through the channel. The frequency at which the concentrated solution or the powders are dispensed, as well as the dispensed volume is predetermined according to the circulation rate of the water to be remineralized in order to optimize the efficiency of the helical insert and obtain, at the outlet of the system, water of substantially constant concentration over time.
    The mineral column can for example be a column of the Akdolit® CM type, comprising a bed of dolomite particles (rock comprising at least 50% dolomite).
    Advantageously, the system for implementing the method of the invention is a cartridge comprising the inlet of water to be remineralized and the outlet of remineralized water and the means for introducing carbon dioxide into the cartridge, said cartridge containing a mixture of mineral beads and beads on which are grafted the enzymes catalyzing the reaction of carbon dioxide and water to form carbonic acid and then bicarbonate. Preferably, the means for introducing carbon dioxide into the cartridge are arranged to allow the circulation of carbon dioxide through the bed of mixed beads and the water inlet and outlet are arranged to allow the circulation of the water. water through a bed of mixed beads.
    The mineral beads preferably comprise calcium and / or magnesium carbonate but can also include magnesium hydroxide or / and calcium hydroxide and / or dolomite or / and magnesite (MgO).
    The term ball does not imply a spherical shape, a ball can have an irregular shape.
    The mineral beads and the beads onto which the enzymes are grafted preferably have the same order of size, but can also have different dimensions.
    Mineral balls, for example, have a grain size between
    0.5 and 4.5 mm, as in the products Akdolit® Hydro-Calcit, which mainly comprises calcium carbonate, or Akdolit® CM (Magno Dol), sold by Rheinkalk Akdolit GmbH & Co. KG.
    The beads onto which the enzymes are grafted may for example have a particle size of between 10 microns and 3.5 mm.
    If the dissolution of CO in water using an enzyme such as carbonic anhydrase is known, it is indeed the combination of this step with the introduction of minerals, in particular calcium carbonate and / or of magnesium, preferably in solid form, which is the heart of the invention, to instantly and online remineralize water with a low mineral content at a predetermined mineral concentration. These are mainly calcium and magnesium as well as carbonates, the dissolution of which is crucial for the hardness and flavor of the water. Many methods have been described for dissolving chlorides or hydroxides of calcium and magnesium. However, these salts do not allow the introduction of carbonates, the content of which is particularly high, and they must then be introduced through other salts which make total mineral balancing complicated. The process of the invention thus makes it possible to obtain water rich both in calcium and / or magnesium and in bicarbonates. The method of the invention also makes it possible to obtain clear water at the outlet of the system allowing it to be implemented. Whether on a domestic or industrial scale, obtaining clear water is essential, so that the pipes and / or pipes that the remineralized water must pass through do not clog by accumulation of particles. solids, which could cause variations in water flow rates, reduced system efficiency and high maintenance costs. Clear water is also desired by the end user.
    The invention will be better understood with the aid of the following description of several embodiments of the invention, with reference to the accompanying drawing, in which: Figure 1 illustrates a first embodiment of the invention; Figure 2 illustrates a second embodiment of the invention, Figure 3 illustrates a third embodiment of the invention, Figure 4 illustrates a fourth embodiment of the invention, and Figure 5 illustrates a cartridge according to invention.
    With reference to FIG. 1, a system 1 for remineralizing at least partly demineralized water comprises a channel 2, for circulating water from an inlet 3 to an outlet 4 between which an inlet 5 of carbon dioxide is arranged. , a compartment or cartridge 6 containing beads 9 onto which are grafted enzymes 10 capable of catalyzing the reaction of carbon dioxide, for example carbonic anhydrase, a powder injector 7 a static mixer 8.
    The arrival of carbon dioxide (CO 3) can be any means of introducing CO, into a water flow well known to those skilled in the art such as, for example, a pipe connected to a source. carbon dioxide under pressure, for example a bottle or a CO generator, and comprising a valve to regulate the flow of CO ,. The type of installation for the CO inlet depends mainly on the size of the system, in particular the flows and volumes of water to be managed.
    The compartment 6 containing beads 9 onto which are grafted enzymes 10 capable of catalyzing the reaction of carbon dioxide, for example carbonic anhydrase, is typically similar in structure to any column of ion exchange resins. commonly used in water treatment. The beads can be made of polyamide resin, cellulose derivative, polysaccharide derivatives or any other polymer suitable for enzymatic grafting, a technique well known to those skilled in the art.
    The powder injector 7 is a means for injecting a predetermined amount of powder. It can for example be a microdosing device, such as for example a pump or microdosing valve or a device for microdosing micronized powder. Such a device may for example comprise an ultrasound system comprising a metering nozzle with a diameter of 100 to 400 microns, or a system similar to those used in 3D printing, such as for example those described by X Lu, S Yanget JRG Evans (Microfeeding with different ultrasonic nozzle designs; - Ultrasonics, 2009; Dry powder microfeeding system for solid {freeform fabrication: Solid Freeform Fabrication Symposium, Austin, TX, 2006; Metering and dispensing of powder: the quest for new solid freeforming techniques, Powder Technology , 178 (1), 56-72. DOI: 10.1016 / j.powtec.2007.04.004). The powder injected by the injector 7 is preferably calcium carbonate and / or magnesium carbonate.
    For example, a synthetic powder or micronized aragonite can be used. Aragonite is the high temperature, high pressure stable polymorphic form of calcium carbonate, the two other ambient stable polymorphs being calcite and vaterite. Marine oolitic aragonite originates in particular from the Bahamas and Florida. Synthetic powders here denote very specific inorganic salts, such as, for example, calcium carbonate, obtained by precipitation under particular conditions giving the particles specific dimensions and properties. For example, the article by Brecevié, L. and Kralj, D. (2007; on calcium carbonates: from fundamental research to application. Croatica Chemica Acta, 80 (3-4), 467- 484) reviews the techniques allowing to obtain polymorphic forms of calcium carbonate. This article describes in particular the formation of amorphous calcium carbonate, which is less stable than the crystalline (calcite, vaterite) or hydrated forms, but exhibiting a higher dissolution rate and which can advantageously be used for the implementation of the process. 'invention. Aragonite can also be obtained synthetically. Synthetic powders of calcium carbonate and / or of magnesium carbonate can for example be used, preferably at least partly in amorphous form.
    Depending on the nature or the amount of minerals you want to dissolve in the water, several successive powder injectors can be placed along channel 2.
    The static mixer 8 is for example a helical mixer. It increases the turbidity in the water flow and improves the dissolution of the injected powder.
    In practice, water with a low mineral content, for example spring water, demineralized water or desalinated water enters channel 2 at inlet 3.
    CO is injected in gaseous form at the level of the CO inlet 5, The water becomes charged with CO, which dissolves in it in small proportion before entering compartment 6. In this compartment 6, in contact with and under the action of enzymes, the dissolved part of CO reacts with water to form carbonic acid and / or bicarbonate according to the equation H, 0 + CO, © H, C04 + HCO, + Ht. Bicarbonate is soluble in water in its ionic form and its formation lowers the pH of the water.
    Preferably, the pH reached by the action of carbonic anhydrase is between 4.5 and 5.5, and more preferably between 4.9 and 5.4.
    The action of the enzyme makes it possible to shift the equilibrium of dissolution of CO in water and to reach a concentration of bicarbonate that is not possible to reach by other in-line techniques, such as 'i.e. without stopping the flow of water in compartment 6.
    On leaving compartment 6, the water with a low mineral content and a high bicarbonate content is remineralized by injection, at a regular frequency determined by the water flow rate and the desired mineral content, with a determined quantity of powder 7, typically magnesium and / or calcium carbonate. The powder dissolves in the circulating water at an optimized rate thanks to the pH of the water which has been reduced by the dissolution of the CO ,. Carbonic anhydrase is essential for sufficient dissolution of CO to take place online, that is, without stopping the water in a tank until it is completely dissolved. These two chemical species, magnesium and calcium, are indeed particularly difficult to dissolve online, that is to say without having to stir the powder for a long time with the water to be remineralized. Concentrations similar to those found in mineral waters rich in calcium and magnesium are notably impossible to achieve without the action of the enzyme described above.
    The system of the invention may thus prove to be particularly advantageous for in-line production systems for mineral water with a predetermined mineral content as described in application PCT / EP2018 / 057868.
    For example, to reproduce a mineral water of the Geroldsteiner® type, the composition of which is described in Table 1 of the aforementioned document, from a previously demineralized water, it is necessary to provide 1816 mg / L of bicarbonate, 348 mg / L of calcium and 108 mg / L of magnesium. In view of the results obtained in Desalinisation 396, (2016) 39- 47, (table 1, run 6), it would be at best possible to obtain the final pH of 5.9, but a maximum concentration of 20 mg / L of calcium ( 0.53 mm Ca *) and 8 mg / L of magnesium (0.36 mm Mg ”') by passing a solution in which CO has been introduced, in gaseous form, over dolomite for more than 12 minutes. We would therefore be far from being able to reproduce the composition of Geroldsteiner® water.
    Gerolsteiner Mineral element (mg / L) Total dissolved matter 2488 Table 1.
    There are other ways besides the direct addition of CO, in gaseous form, to introduce carbon dioxide into the channel.
    With reference to FIG. 2, a system 21 for remineralizing at least partially demineralized water comprises, as described in FIG. 1, a channel 2, for circulating water from an inlet 3 to an outlet 4 between which are arranged means 25 for introducing carbon dioxide, a cartridge 6 containing balls 9 on which are grafted enzymes 10 capable of catalyzing the reaction of carbon dioxide, for example carbonic anhydrase, a powder injector 7 a static mixer 8.
    The means 25 for introducing carbon dioxide here consist of a chamber 22 equipped with an inlet 23 and an outlet 24 of CO ,. Channel 2, after entry 3, continues into an anastomosis compartment 27 where the channel is divided into a plurality or bundle of hollow fibers 26 (four are shown here) extending along chamber 22 to 'to a second anastomosis compartment 28 where the hollow fibers 26 join together before the channel leaves the chamber 25. The hollow fibers 26 are here tubes made from a membrane permeable to CO ,. The CO inlet 23 and outlet 24 are equipped with valves (not shown) making it possible to adjust the pressure in the chamber 22. Such a module can for example be the MiniModule® from the company 3M comprising forty hollow polypropylene fibers. / epoxy running through a cartridge which can be pressurized with a gas.
    As a general rule, the CO pressure applied to the outer wall of the CO permeable membrane is preferably between 1 and 6 bar, at ambient temperature.
    In practice, the water circulating in the channel 2 passes through the hollow fibers 26. The anastomosis compartments 27 and 28 make it possible to manage the flow rate and the pressure of the water during the division of the channel into bundles and the gathering of the bundles. in a single current.
    Carbon dioxide is introduced into the chamber 22 through the inlet 23 so that there is a pressure greater than the pressure of CO, in the circulating water, in order to promote the passage of CO, in the water circulating in the bundles.
    The valves placed at the inlet 23 and the outlet 24 of CO, make it possible to adjust this pressure as a function of the quantity of CO, which it is desirable to introduce into the water as a function of the desired result, it is that is to say of the quantity of CO, which can react in contact with the enzymes in the cartridge 6 and of the pH to be reached downstream for the good dissolution of the powdered minerals.
    This type of chamber traversed by a bundle of membranes permeable to carbon dioxide is known and used to extract CO from industrial fumes in order to limit the release of CO into the atmosphere.
    In general, CO, is adsorbed by an aqueous solution comprising various solvents improving the dissolution of CO ,. However, these systems do not provide for taking a specific amount of CO, as is the case here.
    In addition, in the context of water treatment, for human consumption, it is impossible here to use solvents to improve the removal of CO :. The division of the channel into a bundle allows a greater contact surface between the circulating water and the CO, in the chamber, via the pores of the CO permeable membrane. The optimal contact surface can be calculated depending on the applications (industrial or domestic) and the volume of water to be treated. The materials which can be used for membranes permeable to CO2 are for example polypropylene, PTFE (Teflon), polyimide, polyolefins, etc. Such membranes are commercial, such as for example Superphobic ® Contactors by Membrana GmbH or Celgard X40- 200 gold x30-240. As with the bubbling of CO, this technique allows the water to be treated continuously, without immobilizing the water in a tank.
    The processing chain can be further optimized, in particular by dispensing with the cartridge 6 and by immobilizing the enzymes 10 directly inside the bundles of hollow fibers 26, for example by using standard techniques for immobilizing enzymes on a polymeric material. Referring to Figure 3, where the elements common to the previous figures are numbered identically, a system 31 for remineralization of at least partially demineralized water comprises a channel 2, for circulating water from an inlet 3 to a outlet 4, between which is disposed a chamber 22 similar to that described with reference to FIG. 2, traversed by a bundle of hollow fibers 26. Enzymes 10 capable of catalyzing the reaction of carbon dioxide, for example carbonic anhydrase , are immobilized inside the hollow fibers, on the internal wall of the membrane. Thus, the water flowing through channel 2 is charged with CO, along the bundles of hollow fibers 26. The CO, being converted into bicarbonate under the action of enzymes 10 as the water passes through the hollow fiber 26 , CO absorption along the fiber can be optimized and higher amounts of bicarbonates can be produced. By dispensing with the cartridge 6, it is thus possible to limit the length of the channel and reduce the overall cost of the installation. The powder injector 7 and the mixer 8 are here installed downstream of the unit 25. The static mixer has been described as being a helical mixer, but could be any other type of mixer known to those skilled in the art.
    The powder injector is not the only way to introduce minerals, in solid form, into the water flowing through the channel.
    The device of FIG. 4 illustrates a device similar to that of FIG. 3 where the powder injector 7 and the helical insert 8 are replaced by a mineral column 47, here for example an Akdolit® CM column (Magno Dol), or any other column operating on the same principle. The column is part of channel 2, it represents a portion of channel 2.
    The same modification could also be made on the other systems described above.
    The water circulating in channel 2 crosses the bed of dolomite granules and, on contact with them, becomes loaded with magnesium, calcium and hydrogen carbonates. The dissolution of these species in water is optimized thanks to the pH of the water, which has been reduced by the dissolution of CO ,. Carbonic anhydrase is essential for sufficient dissolution of CO2 to take place online, that is, without stopping water in a tank.
    In all the embodiments described, it is conceivable to have more than one powder injector and / or more than one mineral column or a combination of the two, placed upstream and / or downstream of the means for introducing the powder. CO2 in the channel. For example, an injector could be placed upstream of the CO introduction, to inject part of the powders to be dissolved, a mineral column could for example be installed downstream to supplement the mineral content.
    The dissolution could thus be carried out in several stages and distributed over a longer part of the system.
    Depending on the nature of the minerals to be dissolved in the water, some could be injected separately, before or after the introduction of CO, or the injection of calcium carbonate and / or magnesium powders.
    It is conceivable, for a domestic installation such as that described in PCT / EP2018 / 057868, to provide the unit 25 in the form of a consumable cartridge, to be changed after a few months, when the enzymatic activity is reduced.
    For an industrial installation, it is also possible to provide the unit 25 in the form of interchangeable columns, possibly recyclable.
    FIG. 5 illustrates another embodiment of the invention, in the form of a cartridge 51. The cartridge 51 comprising an inlet 53 of water to be remineralized, here at the top of the cartridge, and an outlet 54 of remineralized water , here at the bottom of the cartridge.
    The introduction of carbon dioxide 55 into the cartridge is not made by an inlet 56 of carbon dioxide, here in the lower section of the cartridge, via a compartment 61. The compartment 61 has an interface 63 with a bed 67 of balls 59. and 57 mixed.
    Beads 57 are mineral beads, while beads 59 support enzymes 60 that catalyze the reaction of carbon dioxide and water to form carbonic acid and then bicarbonate.
    The bed 67 of mixed beads is here a cylinder which occupies most of the cartridge.
    At the top of the cartridge, bed 67 of mixed beads has an interface 64 with a compartment 62 connected to a carbon dioxide outlet 58.
    The water entering the cartridge 51 circulates through the bed 67 but does not enter the compartments 61 and 62. The carbon dioxide passes through the compartment 61, then the bed 67 of mixed beads and finally the compartment 62. The carbon dioxide inlet 61 and outlet 62 compartments are optional, but may be used to regulate the flow and pressure of carbon dioxide passing through bed 67. Other systems may be provided, for example with a carbon dioxide system. valves and / or manometer.
    The interfaces between the bed 67 of mixed beads and the carbon dioxide inlet 61 and outlet 62 compartments can for example be membranes allowing carbon dioxide to bubble through the bed, but not allowing the passage of the carbon dioxide. 'water. It could also be a simple pipe, possibly fitted with a valve. Note that here the carbon dioxide is introduced against the flow of water. This increases the residence time of carbon dioxide in bed 67 of mixed beads. The cartridge 51 can be provided, at the water inlet 53 and the water outlet 54, with easy connection means to a domestic or industrial water circuit, possibly downstream of other units such as a softener. or a demineralization unit, so that it can be easily replaced. Any suitable means known to those skilled in the art can be considered here. The same is true for the inflow and outflow of carbon dioxide.
    权利要求:
    Claims (15)
    [1]
    1. A process for in-line water mineralization according to which: - demineralized water is circulated in a channel (2; 67) inside which enzymes (10, 60) are immobilized to catalyze the reaction of the dioxide of carbon and water to form bicarbonate, - carbon dioxide is introduced into the channel (2), and - a predetermined quantity of solid minerals is introduced into the circulating water.
    [2]
    2. The method of claim 1, wherein to introduce a quantity of minerals: - injecting a mineral powder (7) and / or - circulating the water in the channel through a mineral column (67).
    [3]
    3. Method according to one of claims 1 and 2, according to which the nature and quantity of enzymes are chosen, as well as the quantity of carbon dioxide introduced so as to obtain a pH of predetermined value.
    [4]
    4. Method according to one of claims 1 to 3, wherein the channel (2; 67) is permeable to carbon dioxide over at least part of its length and wherein the carbon dioxide is introduced by application to the wall. outside the channel of carbon dioxide pressure.
    [5]
    5. The method of any of claims 1 to 4 wherein the enzymes catalyzing the reaction of carbon dioxide and water to form bicarbonate are carbonic anhydrase.
    [6]
    6. Method according to one of claims 1 to 5, in which the demineralized water is circulated through a mineral column
    (51) comprising, mixed, beads (57) of minerals and beads (59) on which the enzymes (60) are grafted.
    [7]
    7. Method according to one of claims 1 to 6, according to which carbon dioxide is introduced by bubbling.
    [8]
    8. The method of claim 7, wherein the carbon dioxide is bubbled against the flow of water.
    [9]
    9. Method according to one of claims 1 to 8, wherein the minerals comprise calcium and / or magnesium carbonate.
    [10]
    10. System (1, 21, 31, 51) of demineralized water remineralization comprising a channel (2) for circulating water from an inlet (3, 53) to an outlet (4, 54) along which are arranged: - means (25, 56) for introducing carbon dioxide into the channel; - enzymes (10, 60) capable of catalyzing the reaction of carbon dioxide and water to form bicarbonate immobilized inside said channel, and - means (7, 67) for introducing a quantity predetermined solid mineral, preferably comprising calcium carbonate and / or magnesium.
    [11]
    11. The system of claim 10, wherein the means for introducing carbon dioxide into the channel comprises a wall (26, 63) permeable to carbon dioxide over at least part of the length of the channel (2, 51). and means (24, 61) for applying carbon dioxide pressure to the exterior face of said carbon dioxide permeable wall.
    [12]
    12. The system of claim 11, wherein the means for applying carbon dioxide pressure to the outer face of the carbon dioxide permeable wall comprises a sealed chamber (22, 61) connected to an inlet (54, 56). of carbon dioxide under pressure and crossed by at least the part of the channel comprising the wall permeable to carbon dioxide.
    [13]
    13. System according to one of claims 10 to 12, wherein the means for introducing a predetermined quantity of minerals comprise a powder injector (7) and / or a mineral column (47, 67).
    [14]
    14. System according to one of claims 10 to 13, arranged in the form of a cartridge (51) comprising an inlet (53) of water to be remineralized and an outlet (54) of remineralized water, introduction means (56). ) carbon dioxide in the cartridge, said cartridge containing a mixture of mineral balls (57) and balls (59) on which are grafted the enzymes (60) catalyzing the reaction of carbon dioxide (55) and water to form carbonic acid and then bicarbonate.
    [15]
    15. The system of claim 14 wherein the means (56) for introducing carbon dioxide into the cartridge are arranged to allow the circulation of carbon dioxide (55) through the bed (67) of mixed beads, preferably against the flow of water.
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    同族专利:
    公开号 | 公开日
    BE1026873A1|2020-07-10|
    BE1026871A1|2020-07-10|
    EP3894361A1|2021-10-20|
    BE1026871B1|2020-07-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CN1101626A|1993-10-09|1995-04-19|胡元强|Method for producing hard mineral water by carbonic anhydrase catalysis|
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    JPH0938476A|1995-08-01|1997-02-10|Mitsubishi Rayon Co Ltd|Water making equipment provided with calcium solvency|
    KR20140023600A|2012-08-16|2014-02-27|재단법인 포항산업과학연구원|Apparatus for neutralization of alkali waste water using carbonic anhydrase and method using thereof|
    法律状态:
    2020-08-26| FG| Patent granted|Effective date: 20200713 |
    优先权:
    申请号 | 申请日 | 专利标题
    BE20185889A|BE1026871B1|2018-12-14|2018-12-14|Process of carbonation and mineralization in line of demineralized water.|PCT/EP2019/085146| WO2020120759A1|2018-12-14|2019-12-13|Method for in-line carbonation and mineralization of demineralized water|
    EP19816805.6A| EP3894361A1|2018-12-14|2019-12-13|Method for in-line carbonation and mineralization of demineralized water|
    US17/413,288| US20220055932A1|2018-12-14|2019-12-13|Process for in-line mineralisation and carbonation of demineralised water|
    JP2021533349A| JP2022513451A|2018-12-14|2019-12-13|Methods for in-line mineralization and carbonation of demineralized water|
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