WO2021070172A1 - Système de dosage de liquide autonome - Google Patents

Système de dosage de liquide autonome Download PDF

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Publication number
WO2021070172A1
WO2021070172A1 PCT/IL2020/051012 IL2020051012W WO2021070172A1 WO 2021070172 A1 WO2021070172 A1 WO 2021070172A1 IL 2020051012 W IL2020051012 W IL 2020051012W WO 2021070172 A1 WO2021070172 A1 WO 2021070172A1
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WO
WIPO (PCT)
Prior art keywords
water
flexible container
magnesium
tap
water stream
Prior art date
Application number
PCT/IL2020/051012
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English (en)
Inventor
Gal BROWN
Original Assignee
Brown Gal
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Filing date
Publication date
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Publication of WO2021070172A1 publication Critical patent/WO2021070172A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • C02F1/685—Devices for dosing the additives
    • C02F1/686—Devices for dosing liquid additives
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
    • A23L33/10—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
    • A23L33/10—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
    • A23L33/15—Vitamins
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
    • A23L33/10—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
    • A23L33/16—Inorganic salts, minerals or trace elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
    • A61J1/14—Details; Accessories therefor
    • A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
    • A61J1/14—Details; Accessories therefor
    • A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
    • A61J1/2003—Accessories used in combination with means for transfer or mixing of fluids, e.g. for activating fluid flow, separating fluids, filtering fluid or venting
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • C02F1/685—Devices for dosing the additives
    • 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
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/722—Oxidation by peroxides
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/005—Processes using a programmable logic controller [PLC]
    • C02F2209/008—Processes using a programmable logic controller [PLC] comprising telecommunication features, e.g. modems or antennas
    • 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
    • C02F2209/03—Pressure
    • 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
    • C02F2209/40—Liquid flow rate

Definitions

  • the invention pertains to the fields of chemical and/or medicine dosing and water treatment. More particularly, the invention pertains to adding a beneficial compound to drinking water or any water consumed by humans, animals or plants, especially for dosing beneficial chemicals (e.g. mineral salts, including ions of magnesium, iodine, potassium and fluoride, vitamins, such as ascorbic acid and vitamin B12, and beneficial food additives such as citric acid, etc.) in low rates to small water systems, (e.g. to a water tap in a residence, office, or factory) or to the main water inlet of a residential unit, building or irrigation system.
  • beneficial chemicals e.g. mineral salts, including ions of magnesium, iodine, potassium and fluoride, vitamins, such as ascorbic acid and vitamin B12, and beneficial food additives such as citric acid, etc.
  • desalination systems have been increasingly used for drinking water supply.
  • the desalinated water is deficient in many beneficial minerals that are important or deemed essential or beneficial for consumers’ health.
  • the water suppliers do not fortify the water with important minerals that were removed by desalination, and many households wish to install a simple dosing device to fortify the tap water with a small amount of the deficient minerals while still assuring that the level of the fortified ingredients will be carefully controlled and will not be excessive.
  • a remineralization system can be a beneficial addition not just to desalinated water sources, but to any water source with nutrient deficiencies (e.g. surface water after treatment).
  • the very same system can be used to fortify household water supplies with important nutrients or small irrigation systems with dissolved pesticides or nutrients, including, for example, magnesium, phosphorous and nitrogen containing species.
  • the system can also be implemented in animal drinking water systems.
  • Water dosing systems consist of a tank or another water reservoir with a solution to be added to the water.
  • the dosage to the water is usually done by pumps which require an external power source (e.g. an electro-mechanical, centrifugal, peristaltic or diaphragm pump) or by a venturi pump that operates on the Bernoulli principle.
  • an external power source e.g. an electro-mechanical, centrifugal, peristaltic or diaphragm pump
  • a venturi pump that operates on the Bernoulli principle.
  • Conventional water dosing systems used in water treatment i.e.
  • venturi pump does not require external power, venturi dosage is not accurate and dosing depends very much on the pressure in the distribution system or the boundary condition (such as the water speed) in the venturi pump.
  • This invention provides dosing of magnesium chloride without using a pressurized system, oversaturated solutions, additional pumping systems, electric power or a venturi suction pump. Feeding the fortifying solution into the water stream can be done at the pressure of the water distribution system.
  • the present invention is directed to a system for adding a quantity of a chemical to a water stream, the system comprising: a rigid container through which the water stream flows; a flexible container containing a solution of the chemical, the flexible container disposed within the rigid container such that pressure from the water stream compresses the flexible container thus expelling a portion of the solution from the flexible container; and a mixing chamber having a first inlet connected to the flexible container, a second inlet connected to the rigid container, and an outlet.
  • the rigid container is a polyvinylchloride tube.
  • the flexible container is a silicone tube.
  • the flexible container is an aluminum bag.
  • the system additionally includes one or more of the following components: a flowmeter, a pressure gauge, an inlet pressure regulator, an ion exchange column, a column of activated carbon or beta alumina.
  • the outlet is connected to a water tap.
  • the water tap preferably includes a first tap for dispensing water from said outlet and a second tap for dispensing water from said water stream.
  • the system includes a mixer for mixing water from said outlet with said water stream.
  • the water stream is for human consumption.
  • the chemical may be a vitamin or mineral.
  • the chemical is magnesium.
  • the magnesium is in the form of magnesium chloride or magnesium sulfate, most preferably, magnesium chloride.
  • the water stream is for animal consumption.
  • the chemical is a vitamin, mineral or medicine, such as antibiotic.
  • the water stream is for agricultural use.
  • the chemical is an ammonium compound, a phosphate, a pesticide or an herbicide.
  • the solution may comprise a disinfectant such as active chlorine or hydrogen peroxide.
  • the flexible container is connected to the first inlet via a microtube.
  • the flexible container contains a flow adjusting element to control the flow of the solution out of the flexible container.
  • the the flow adjusting element is a preferably a screw.
  • the flow adjusting element may be smart faucet that can be controlled remotely by WiFi or Bluetooth.
  • Fig. 1 is a perspective view of a dosing system in accordance with an embodiment of the present invention
  • Fig. 2 is another perspective view of a dosing system in accordance with an embodiment of the present invention.
  • Fig. 3 is a cross-sectional view along the axis of a dosing system in accordance with an embodiment of the present invention
  • Fig. 4 is a cross-sectional view along the axis of a dosing system in accordance with an embodiment of the present invention showing the flow of different solutions in the dosing system;
  • Fig. 5 is an isometric view of an outlet end of a dosing system in accordance with an embodiment of the present invention.
  • Fig. 6 is a simplified schematic of a nutrient fortification system in accordance with an embodiment of the present invention.
  • Fig. 7 is a simplified schematic the flow of water from a nutrient fortification system in accordance with an embodiment of the present invention to a domestic water tap.
  • Dosing unit 10 comprises a main tube 12 having an inlet cup 14 and an inlet port 16 for connecting to the domestic water supply.
  • Main tube 12 may be a standard polyvinylchloride (PVC) tube.
  • Inlet port 16 can be any standard hose fast connection made of plastic or stainless steel such as Lergis series LF3000.
  • Main tube 12 also comprises an outlet cup 18 with an outlet cup cover 20.
  • Outlet cup 18 includes an inner mixing compartment for mixing of a fortifying nutrient solution with the water from the water supply flowing to the tap, which will be described below with reference to Fig. 3.
  • Dosing unit 10 does not include any electrical connector and is operational as long as the pressure at the inlet of dosing unit 10 is at least 2 bar, preferably between 2 and 3 bar, most preferably about 2.5 bar.
  • Main tube 12 preferably has a diameter of 20-100 mm and a length of 150-750 mm. However, the size of main tube 12 is not limited to these values and can be larger or smaller as well.
  • FIG. 2 is a perspective view of dosing unit 10 from the side of outlet cup 18.
  • Outlet cup cover 20 includes an outlet port 22 through which water fortified with the nutrient flows to a tap.
  • Outlet cup 18 and outlet cup cover 20 are preferably made of PVC.
  • Outlet port 22 is preferably made of plastic or stainless steel such as Lergis series LF3000
  • Fig. 3 shows a cross section along the longitudinal axis of dosing system 10 shown in Figs. 1 and 2.
  • inlet port 16 is preferably coupled to an inlet non-return valve system to prevent leakage of the nutrient solution back to the water supply and to stop the fortification of the nutrient to the water when the flow to the tap stops.
  • the non-return valve system preferably includes a flow accessory tube 24 to prevent back-flow of water from main tube 12 out though inlet port 16 in case of pressure loss in the water supply to dosing system 10.
  • Flexible portion 26 may be made of silicone or another elastic polymer, or may be a mechanical non-return valve (NRV).
  • NAV mechanical non-return valve
  • flexible portion 26 shrinks back on flow accessory tube 24 and seals it, preventing water from flowing backward.
  • Main tube 12 includes in its interior a flexible inner container 30 filled with a fortifying nutrient solution.
  • Flexible inner container 30 is preferably made from silicone or another elastic polymer or aluminum compliant with drinking water or other water end-use requirements.
  • flexible inner container 30 may be a standard silicone tube.
  • flexible inner container 30 is an aluminum bag.
  • the diameter of the flexible inner container 30 is preferably in the range of 15 mm to 80 mm, but it can have a smaller or larger diameter. In one embodiment, the diameter of flexible inner container 30 is about 40 mm.
  • Flexible inner container 30 is smaller than main tube 12, preferably having a volume of 60-90% of the volume of main tube 12. A size that is too small will lower the amount of the nutrient held within, and a size that is too large can cause flexible inner container 30 to cling to main tube 12.
  • Flexible inner container 30 is preferably a round tube with one end closed and the other end open for coupling to outlet cup 18.
  • channel 32 is a microtube.
  • the diameter of the microtube can be in the range of 0.1 mm- 1.5 mm, preferably about 0.5 mm, and the length can be in the range of 5 mm to 200 mm, preferably about 10 mm.
  • the head loss caused by the small diameter of the microtube results in a limited flow of fortifying nutrient solution from flexible inner container 30 in order to achieve the desired dilution ratio.
  • flexible inner container includes a flow adjusting element 36 which controls the flow of the fortifying nutrient solution into channel 32.
  • Flow adjusting element 36 can be in the form of an adjusting screw made of e.g. stainless steel, titanium or plastic. The adjusting screw constricts channel 32 from flexible inner container 30 to the mixing volume where the fortifying and fortified water streams are mixed.
  • the adjusting screw is not visible to the end consumer and can be adjusted only by a technician.
  • flow adjusting element 36 is a smart faucet which can be controlled remotely by Wi-Fi or Bluetooth.
  • Channel 32 includes a no-retum valve 38 to prevent flow of water back into flexible inner container 30 and dilution of the fortifying nutrient solution.
  • the fortifying nutrient solution flows through valve 38 to a mixing chamber 40.
  • Water from main tube 12 flows through a channel 42 to mixing chamber 40 and is mixed with the fortifying nutrient solution.
  • Channel 42 includes a no-return valve 43 to prevent back flow into main tube 12.
  • the solution from the mixing chamber flows out of dosing unit 10 to a tap through outlet port 22.
  • the solution flowing from outlet port 22 may be mixed with water from the water supply flowing in parallel to the water in dosing unit 10 as another means to control the mixing ratio of the fortifying nutrient solution and the water.
  • Fig. 4 shows the flow of the water from the water supply, the fortifying nutrient solution and the fortified water in dosing system 10.
  • the blue dashed line shows the flow of water from the water supply.
  • the red arrows show the flow of the fortifying nutrient solution.
  • the dark blue triangles show the flow of the fortified water.
  • Fig. 5 is an isometric view of the outlet end of dosing system 10. The connections between channel 32 which provides the fortifying nutrient solution and channel 42 which provides water from main tube 12 with mixing chamber 40 can be seen in Fig. 5.
  • a used flexible inner container 30 will be replaced by a new, full one or refilled after its content drops below approximately 10% of its initial volume.
  • Flexible inner container 30 may contain only one nutrient or several nutrients. The concentration of the nutrients should be set to such a concentration that after dilution with water coming from the water supply their concentration in mg/L times 2 liters will provide equal to or less than the daily recommended consumption of each nutrient.
  • the concentration of each of the nutrients should not exceed the solubility limit under the anticipated working temperature (e.g. between 0 and 60 °C or between 0 and 40 °C) unless solubilization of the nutrients and formation of a stable aqueous microemulsion is attained.
  • the water supply may be a domestic water supply for providing water for human consumption in residential, commercial or industrial areas.
  • the water supply may be for farming use, such as for consumption by livestock and poultry.
  • the water supply may be for agricultural use, such as for irrigation.
  • nutrients and their concentration range include minerals such as magnesium salts having a concentration of 1 g/L to 75 g/L, preferably 5 g/L to 15 g/L, as magnesium; water soluble vitamins including vitamin Bl, B2, B4, B5, B6, and B12 at concentrations below 0.5 g/L each; vitamin B3 at a concentration of up to 10 g/L; vitamin C at a concentration up to 30 g/L; iodide at a concentration of up to 75 mg/L; and fluoride at a concentration of up to 1 g/L.
  • minerals such as magnesium salts having a concentration of 1 g/L to 75 g/L, preferably 5 g/L to 15 g/L, as magnesium; water soluble vitamins including vitamin Bl, B2, B4, B5, B6, and B12 at concentrations below 0.5 g/L each; vitamin B3 at a concentration of up to 10 g/L; vitamin C at a concentration up to 30 g/L; iodide at a
  • the solution can also contain a disinfectant such as active chlorine (in the form of hypochlorite salt) at a concentration of up to 4 mg/L or hydrogen peroxide at a concentration lower than 30 mg/L to prevent microorganism growth in the flexible container.
  • a disinfectant such as active chlorine (in the form of hypochlorite salt) at a concentration of up to 4 mg/L or hydrogen peroxide at a concentration lower than 30 mg/L to prevent microorganism growth in the flexible container.
  • the concentration range is not limited to these values and can be higher or lower as well.
  • the magnesium salt can be magnesium chloride, magnesium sulfate, magnesium bicarbonate or magnesium nitrate at a concentration that will not exceed, after dilution, the maximum allowable concentration in drinking water. More preferably, the magnesium salt is magnesium chloride or magnesium sulfate. Most preferably, the magnesium salt is magnesium chloride.
  • the dilution ratio of the nutrient coming from the flexible container and water coming from the tap should be between 1:50 to 1:10000, more preferably between 1:50 and 1:1000, most preferably from 1:50 to 1:500.
  • the dilution ratio depends on the dilution requirements in each field of use, with higher dilution for agriculture and lower dilution for medical applications. However, the dilution ratio is not limited to these values and can be higher or lower as well.
  • flexible inner container 30 may contain a phosphorous source (e.g. a phosphate salt) or a nitrogen source (e.g. nitrate, ammonia or urea) at a concentration which is below the solubility limit.
  • a phosphorous source e.g. a phosphate salt
  • a nitrogen source e.g. nitrate, ammonia or urea
  • a combination of one, several or all of the abovementioned nutrients can be used.
  • a combination of nutrients e.g. ammonium compounds, phosphates), minerals (magnesium, iodine, iron, etc.), pesticides (e.g. nematocides) or herbicides
  • a nutrient or medicine such as an antibiotic, can be provided by introduction of a solution containing a mixture of the chemicals into the dosing system.
  • FIG. 6 depicts a nutrient fortification system 50 in accordance with a preferred embodiment of the present invention.
  • Water flows from a domestic water supply 51 through a check valve 52 and then optionally through a flowmeter 54 and a pressure gauge 56.
  • dosing unit 10 can accurately dose the fortifying nutrient solution under a wide range of inlet pressures, nevertheless nutrient fortification system 50 preferably includes an inlet pressure regulator 58 such as a 3/4" PRV pressure regulator made by BARMAD, Israel. Pressure at the inlet to dosing unit 10 should be regulated to the range of ⁇ 5 atm and preferably to a range of 2-3 atm.
  • a check valve 59 is preferably installed at the outlet 60 of nutrient fortification system 50 from which nutrient fortified water flows to a tap.
  • Nutrient fortification system 50 may also include an ion exchange resin in a column (not shown) to remove chloride ions and positively charged counter ions (mostly calcium and sodium) from the water and replace them partially or entirely by hydroxyl and/or hydronium ions or another pair of ions.
  • Complete removal of a chemical compound by the ion exchange resin is preferred in some cases (e.g. arsenic in drinking water) and in others only partial removal of a nutrient by the ion exchange resin is preferred (e.g., partial removal of fluoride or sodium from drinking water). It is preferable to place the ion exchange resin before the dosing system so that the removal of chloride is proportional to the original concentration of chloride before the mixing with the magnesium chloride additive. In this way, no exchange will take place when desalinated water devoid of chloride is supplied in the grid.
  • Nutrient fortification system 50 may also include a column of activated carbon, beta alumina or any specific ion exchange resins (not shown) for the removal of unwanted contaminants or undesirable compounds from the water. The installation of such columns would not have negative effect on the operation of the dosing unit described herein.
  • Figure 7 depicts a system wherein two different water lines are supplied to the same tap 62.
  • Tap 62 is fed hot water 66 and cold water 68 from the domestic water supply 51.
  • Tap 62 includes an additional water supply 64 from nutrient fortification system 50. In this manner, the same tap can be used for drinking water including a fortifying nutrient and for applications such as cleaning which do not require the fortifying nutrient.
  • a magnesium fortification system was constructed and tested for dosing of magnesium chloride to intermittently opened tap with different flowrates (50 - 100 liters per hour) which are characteristic for kitchen water taps or whole house water supplies.
  • Water from a residential water supply flowed through a digital flow meter (Endress+Hauser model Promag 10), a pressure gauge (ABB model 2600T), and a flow and pressure regulator (3/4" PRV pressure regulator made by BARMAD), and then to a fast hose connector (Lergis series LF3000) of a PVC main tube (part number or size).
  • a fast hose connector Ligis series LF3000
  • the fortification system was operated under different magnesium solution flowrates resulting in different concentrations of magnesium at the outlet.
  • the tap water flowrate during the series of experiments was set in between 98-102 L/h at a pressure of approximately 2-2.5 bar.
  • the magnesium solution flowrate was adjusted between experiments using an adjusting screw according to the required magnesium dosing level, tap water flowrate and initial magnesium chloride concentration in the flexible inner container as described in Table 1 below.
  • Magnesium concentration in the fortified water was measured using a HACH DR 1900 spectrometer with Magnesium kit LCK 326.
  • the flowrate of the magnesium chloride solution was calculated based on the flowrate of the tap water and the concentrations of magnesium in the tap water, in the magnesium chloride solution and in the fortified water. The results are shown in Table 1.
  • Table 1 Of note is that the even at the same tap, the background level of magnesium is subject to variation. This is probably due to the different sources of water used to supply the water. This variation must be considered when setting the level of fortification so that the consumption of the fortified water does not lead to surpassing the recommended consumption of the fortifying nutrient.
  • the recommended daily allowance of magnesium is 300-400 mg/day for adults. In view of the background levels of magnesium in the water supply, 10-35 mg/L of magnesium fortification is appropriate. Under different background conditions, a different level of fortification may be used. The level of fortification may be changed by adjusting the concentration of the magnesium in the flexible inner container of adjusting the flow rate of the fortifying nutrient solution using a flow adjusting element as described above.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Organic Chemistry (AREA)
  • Mycology (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Nutrition Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Inorganic Chemistry (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Treatment Of Water By Ion Exchange (AREA)

Abstract

L'invention concerne un procédé et un système pour fortifier de l'eau avec une solution aqueuse contenant un ou plusieurs minéraux ou additifs bénéfiques. Le système permet un dosage précis sans qu'il soit nécessaire de recourir à une connexion électrique. Le système contient un récipient flexible contenant la solution fortifiante qui est mise en contact avec un récipient externe à travers lequel l'eau s'écoule vers un robinet. L'écoulement de l'eau depuis l'alimentation en eau vers le robinet comprime le récipient flexible et force un écoulement de la solution fortifiante hors du récipient flexible. Des clapets antiretour sont installés pour empêcher un reflux.
PCT/IL2020/051012 2019-10-07 2020-09-16 Système de dosage de liquide autonome WO2021070172A1 (fr)

Applications Claiming Priority (2)

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IL269867 2019-10-07
IL269867A IL269867B (en) 2019-10-07 2019-10-07 Autonomous liquid dosing system

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WO2021070172A1 true WO2021070172A1 (fr) 2021-04-15

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0036307A2 (fr) * 1980-03-14 1981-09-23 Peter Leonard George Pharaoh Appareil et méthode de mesure de liquide
US20100270399A1 (en) * 2007-10-16 2010-10-28 Methven Limited Dispenser and a method of filling a liquid additive container

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0036307A2 (fr) * 1980-03-14 1981-09-23 Peter Leonard George Pharaoh Appareil et méthode de mesure de liquide
US20100270399A1 (en) * 2007-10-16 2010-10-28 Methven Limited Dispenser and a method of filling a liquid additive container

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