EP3570684A1 - Dispositif et procede de traitement par des ondes acoustiques de haute frequence - Google Patents
Dispositif et procede de traitement par des ondes acoustiques de haute frequenceInfo
- Publication number
- EP3570684A1 EP3570684A1 EP18700419.7A EP18700419A EP3570684A1 EP 3570684 A1 EP3570684 A1 EP 3570684A1 EP 18700419 A EP18700419 A EP 18700419A EP 3570684 A1 EP3570684 A1 EP 3570684A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- enclosure
- treatment
- cleaning
- plant
- khz
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
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- 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
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/26—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by irradiation without heating
- A23L3/30—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by irradiation without heating by treatment with ultrasonic waves
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C1/00—Apparatus, or methods of use thereof, for testing or treating seed, roots, or the like, prior to sowing or planting
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G7/00—Botany in general
- A01G7/04—Electric or magnetic or acoustic treatment of plants for promoting growth
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B7/00—Preservation or chemical ripening of fruit or vegetables
- A23B7/015—Preserving by irradiation or electric treatment without heating effect
-
- 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
- A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
- A23L5/30—Physical treatment, e.g. electrical or magnetic means, wave energy or irradiation
- A23L5/32—Physical treatment, e.g. electrical or magnetic means, wave energy or irradiation using phonon wave energy, e.g. sound or ultrasonic waves
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23N—MACHINES OR APPARATUS FOR TREATING HARVESTED FRUIT, VEGETABLES OR FLOWER BULBS IN BULK, NOT OTHERWISE PROVIDED FOR; PEELING VEGETABLES OR FRUIT IN BULK; APPARATUS FOR PREPARING ANIMAL FEEDING- STUFFS
- A23N12/00—Machines for cleaning, blanching, drying or roasting fruits or vegetables, e.g. coffee, cocoa, nuts
- A23N12/02—Machines for cleaning, blanching, drying or roasting fruits or vegetables, e.g. coffee, cocoa, nuts for washing or blanching
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
- A47J43/24—Devices for washing vegetables or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B7/00—Preservation or chemical ripening of fruit or vegetables
- A23B7/14—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10
- A23B7/153—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of liquids or solids
- A23B7/158—Apparatus for preserving using liquids
-
- 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
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/015—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with pressure variation, shock, acceleration or shear stress or cavitation
Definitions
- the invention relates to a device and a method of treatment for example cleaning and / or decontamination of foods such as plant foods, by high frequency acoustic waves.
- Fruits and vegetables are an essential part of the diet of people around the world, contributing to a supply of vitamins and essential minerals; they can be consumed raw in the first and fourth range or processed according to the processes of the food industry in second, third and fifth ranges.
- fruits and vegetables grown under conventional farming methods are subject to microbiological contamination and food-borne diseases associated with the consumption of these products are widely present throughout the world and can lead to public health problems. These risks are further increased when agricultural practices minimize inputs as is the case in organic farming. Indeed, many bacteria, such as Bacillus, Salmonella, Listeria, Staphylococcus, Escherichia, are able to adhere and form a biofilm on different surfaces, for example on the surface of fruits and vegetables (Elhariry, 201 1, " Bacillus cereus on green-leafy vegefables: cabbage and leffuce, Food Microbiology 28, 1266-1274). Fresh fruits and vegetables are particularly exposed during harvesting, packaging and storage in the cold room during transport, and finally during transformations such as pre-cutting operations, to these various risks of pathogenic contamination.
- the control of sanitary quality is one of the essential stakes, both for the marketing of fresh fruits and vegetables and for the raw materials used in the fruit and vegetable processing industries, especially the fourth-line industries.
- sanitary quality is one of the essential stakes, both for the marketing of fresh fruits and vegetables and for the raw materials used in the fruit and vegetable processing industries, especially the fourth-line industries.
- a reduction in the initial microbial load minimizes the risks of contamination throughout the conservation and processing chain. It is therefore imperative for agri-food industries to ensure sanitary quality upstream of processes and at each stage of processing to ensure the safety of products.
- the decontamination operations are essentially aimed at controlling the sanitary quality, ie eliminating pathogenic microorganisms for humans, but also they participate, in fact, in the elimination of chemical substances (pesticides, fungicides) resulting from phytosanitary treatments. They also aim to control phytopathogenic or opportunistic contamination, non - pathogenic for humans, which develops after harvest, alters the products in storage and renders them unfit for consumption and marketing.
- production conditions that aim to limit the use of plant protection products (pesticides, fungicides) before harvest are more favorable for the development of microorganisms during storage, which is currently the main cause of losses after the harvest. harvest. This issue, which is essential for all types of production, is one of the main factors limiting production in organic farming.
- washing fruits and vegetables for fresh marketing, fourth-line industries and processing industries is a major step.
- the main purpose of washing is to minimize microbiological, biological and chemical contaminants on the surface of plants.
- Chlorine and chlorinated compounds have been used as disinfectants for decades, and are still the only disinfectants that are acceptable for the agri-food industry. Much work has been done on the effects of chlorine and sanitary quality (2007, “Comparison of disinfection by product formation from chlorine and alternative disinfectants", Water Research 41, 1 667-1678, Al-Zenki et al., 2012 "Microbial safety and sanitation of fruit and fruit products", In: Handbook of Fruit and Fruit Processing (Wiley-Blackwell, USA, pp. 339-340). Most methods of washing fresh raw materials therefore use chlorine and large quantities of water, the renewal of chlorinated water being the basis of washing efficiency.
- ultrasound is used for the decontamination of processed products (such as juices, mashed potatoes, etc.) that do not require maintaining the integrity of living tissues.
- processed products such as juices, mashed potatoes, etc.
- ultrasound with frequencies of 20-100 kHz have the ability to cause cavitation, used in the food industry to inactivate microorganisms (Piyasena et al., 2003, "Inactivation of microbes using ultrasound: has rev / 'ew "International Journal of Food Microbiology 87 (3), 207-216).
- a major advantage of ultrasound over other techniques in the food industry is that waves are generally considered safe, non-toxic and environmentally friendly (entish and Ashok Umar, 201 1, 'The physical and chemical effects of ultrasound In: Feng, H., Barbosa-Canovas, GV, Weiss, J. (Eds.), Ultrasound Technologies for Food and Bioprocessing, Springer, London, pp. 1-12).
- the Applicant has developed a new equipment and a new technology, environmentally friendly for cleaning and / or an optimized disinfection of products, preferably foods, while limiting the undesirable effects observed in the prior art.
- Such a technology implemented is advantageously called “green”, that is to say without addition of chemical contaminant, without rejection for the environment and without production of by-products harmful to health.
- This technology advantageously allows decontamination as effective as that obtained by chlorine. It also eliminates some of the chemical residues. It can therefore meet the expectations of professionals throughout the agri-food processing chain and in particular the fourth-range processing industries.
- the invention therefore has as its first object a device for processing by high frequency acoustic waves, comprising at least one chamber, which is preferably an overflow tank comprising a liquid, and at least one ultrasound transducer, characterized in that the The waves produced by the ultrasonic transducer in the chamber have a frequency greater than 100 kHz, preferably greater than 200 kHz.
- the second object of the invention is the use of a device according to the invention, for the treatment of a plant or for the non-therapeutic treatment of an animal, inserted in the enclosure.
- the third object of the invention is the use of a device according to the invention for the ex vivo modification of the metabolism of an organism, an organ or a tissue inserted into the chamber.
- the subject of the invention is a method of cleaning and / or decontamination by high frequency acoustic waves, characterized in that it comprises the following steps according to which:
- a product to be cleaned and / or decontaminated by at least one polluting particle is introduced into an enclosure which is preferably an overflow tank;
- high frequency acoustic waves greater than 100 kHz, preferably greater than 200 kHz, are generated in said enclosure by an ultrasonic transducer;
- the acoustic waves propagate in the chamber and reach the product to be cleaned and / or decontaminated;
- the cleaned and / or decontaminated product is recovered.
- Figures 1a, 1b and 1c show schematic diagrams of preferred embodiments of a device for the decontamination of plant foods by high frequency acoustic waves according to the invention.
- Figure 2 shows the effect of the use of high frequency ultrasound (megasons) in a device according to the invention on the microbial load of salads compared with a treatment with chlorine or water.
- the invention relates to a device for treating products or organisms, preferably foods, with high frequency acoustic waves.
- treatment is understood to mean the modification of the product or the organism to be treated, for example cleaning, stimulation, decontamination, sterilization, solubilization or mineralization, with the exception of the therapeutic treatment of an animal, including the man.
- the Applicant has been able to demonstrate that the use of the device that is the subject of the invention notably makes it possible to clean and decontaminate foods, preferably plant foods, by high frequency acoustic waves propagating in a liquid, preferably water, without addition of chemical compound.
- one of the features of the device is not to alter the living structures. It will therefore be mainly used with living plant organisms, but can also be used with various matrices whose integrity is to be advantageously preserved.
- the device 1 object of the invention essentially comprises at least one chamber 2 and an ultrasonic transducer 3.
- the chamber 2 according to the invention is a closed space suitable for to contain the product or products 4 to be treated, preferably to clean and / or decontaminate.
- the enclosure is a container intended to receive the products to be treated, preferably to clean and / or decontaminate. As illustrated in FIG. 1, said container may for example be reclosable by a cover 5.
- the enclosure 2 may be of any geometric shape, for example cylindrical, diamond, oval, ovoid, inverted ovoid, parallelepipedal, frustoconical, inverted frustoconical. It is preferably of cylindrical or parallelepipedal shape.
- the enclosure 2 is a tank having one or more openings for filling, emptying, setting up treatment operations, preferably cleaning and / or decontamination.
- the openings may be valves possibly provided with a thread allowing, for example, to connect filling or emptying pipes.
- the diameter of the valves is for example about 40 mm, 50 mm or 70 mm.
- the openings may also be faucets for taking a sample of the liquid contained in the enclosure, for example for analysis or tasting.
- the volume of the chamber is preferably greater than 0.001 m 3 , for example between 0.001 m 3 and 500 m 3 .
- the volume of the chamber is greater than 0.5 m 3 , for example between 0.5 m 3 and 50 m 3 .
- the volume of the chamber is greater than 2.5 m 3 , for example between 2.5 m 3 and 25 m 3 .
- the device that is the subject of the invention can be in the form of a tray adapted for use in the kitchen, whose size is comparable to the salad spinner currently on the market, with a capacity of approximately 1 to 5 liters and whose diameter is generally between 20 cm and 45 cm.
- the device which is the subject of the invention can integrate a dewatering module that couples the cleaning and / or decontamination of the food to its spin before use or packaging.
- the chamber 2 which is preferably a tank, is advantageously made of concrete, fiberglass, stainless steel or coated metal.
- the chamber 2 which is optionally an overflow tank, comprises a liquid 6.
- the liquid 6 allows the diffusion of the acoustic waves within the chamber 2.
- the liquid 6 contained in the enclosure is a treatment liquid, preferentially cleaning comprising for example:
- alcohol which is usually either ethanol or isopropanol
- organic acids such as calcium lactate,
- the liquid 6 contained in the chamber is used in solution, very diluted.
- the treatment or cleaning liquid 6 is water, soft or saline. More preferably, the treatment or cleaning liquid 6 is fresh water.
- usable freshwater mention may be made of drinking water such as mineral water, spring water or osmosis water.
- the water used in the device 1 according to the invention is a drinking water.
- the water of the treatment liquid may contain one or more other cleaning agent (s) and / or decontamination chosen from detergents and / or disinfectants.
- Detergents are agents whose mode of action is physical or physicochemical.
- Non-limiting examples of detergents that can be used include:
- alkalis such as in particular sodium hydroxide, potassium hydroxide, carbonate and trisodium phosphate
- acids such as in particular phosphoric, nitric and acetic acids
- chelating agents such as sodium pyrophosphate and EDTA (ethylene diamine tetraacetic acid).
- halogens in particular chlorine and its derivatives, which are particularly easy to use and inexpensive, in particular bleach (sodium hypochlorite) and sodium chlorocyanurates; , or the iodine derivatives;
- oxides and peroxides such as hydrogen peroxide, ozone and peracetic acid
- aldehydes such as formaldehyde and glutaraldehyde
- surfactants and in particular quaternary ammoniums
- the device 1 further comprises at least one ultrasonic transducer 3, that is to say a device converting electrical energy into acoustic energy in the ultrasonic range.
- the transducer 3 according to the invention is composed of a single ceramic made from a homogeneous material or piezo-composite.
- Transducers 3 are resonant elements, such as tuning forks.
- the ultrasonic transducer 3 of the device 1 produces in the chamber 2, waves with a frequency greater than 100 kHz, preferably greater than 200 kHz. More preferably, the wave frequency is greater than 500 kHz. Particularly advantageously, the frequency of the waves produced in the chamber is between 1 MHz and 5 MHz. Such high frequency ultrasound higher than 1 MHz are also called megasons.
- the wave frequency is between 1.6 MHz and 2.3 MHz.
- the wave frequency is 1 MHz, 1.5 MHz, 1.6 MHz, 1.7 MHz, 1.8 MHz, 1.9 MHz, 2.0 MHz, 2.1 MHz, 2.2 MHz, 2.3 MHz, 2.5 MHz or 3 MHz.
- the frequency of the ultrasound or ultrasonic waves generated by the ultrasonic transducer 3 is fundamental. Indeed, the principle of treatment, cleaning and / or decontamination using the device 1 according to the invention is based on the mechanical effects of the acoustic wave.
- the first effect of the presence of acoustic waves for example in the vicinity of the epidermis of a plant is to promote the dissolution of soluble products deposited on the plant. Indeed, the particle velocity of the acoustic wave renews the liquid in contact with the soiled part.
- the solid parts hung on the plant, generally small, are excited by the waves that propagate in the treatment liquid or cleaning.
- the size of the particles is compared to the dimensions that characterize the acoustic wave in the tank 2.
- the characteristic quantities are the wavelength (distance between two pressure maxima) and the acoustic boundary layer, also called the viscous boundary layer (distance between the plant surface and the area where the particle velocity is no longer subject to adhesion conditions). These two quantities are related to the frequency of the wave. The higher the frequency, the smaller these quantities are.
- the wavelength is of the order of 0.5 mm to 2 mm in the water, and the acoustic boundary layer is about 1 micron in water if the frequency is 1 MHz.
- the particle placed on the product 4 to be treated, cleaned and / or decontaminated which is for example a plant
- the particle has part of its surface (the part farther from the support) subjected to the acoustic velocity field, but it is also subjected to the acoustic pressure field (alternation pressure / depression).
- the forces resulting from this environment make the particle vibrate and facilitate the stall.
- the particles deposited on the product 4 to be treated, cleaned and / or decontaminated are associated with trapped air microbubbles.
- the acoustic wave makes this bubble vibrate and makes it change volume which contributes to destabilize the particle and unhook it.
- the megas with their very short wavelength can penetrate the crevices of the epidermis of plants to dislodge any type of soil.
- the efficiency of cleaning is even better than the sound power is strong.
- the sound power is too strong and exceeds a certain threshold, the phenomenon of cavitation can appear.
- Cavitation threshold means the acoustic power required to obtain cavitation, that is to say the creation and implosion of a gas bubble.
- the bubble contains the gaseous phase of the liquid support of the acoustic wave.
- the bubble subjected to variations in acoustic pressure oscillates and then implodes. At the time of the implosion, very intense pressures are generated, as well as high temperature rises. We can then see light emissions.
- This "strong cavitation” is to be compared to the “weak cavitation” for which the bubble consists of dissolved gases present in the cleaning liquid 6, the pressures and temperatures due to this phenomenon are safe for plants. In this case there is no light radiation.
- the use of very high frequency ultrasound, preferably megasons, makes it possible to have a very wide range of acoustic power without reaching cavitation strong.
- the device according to the invention makes it possible to control the presence of strong cavitation, thanks to the acoustic signature characteristic of strong cavitation.
- the Applicant has thus been able to demonstrate that treatment, cleaning and / or decontamination by megasonic waves are thus particularly well suited to fragile substrates such as plant foods, and more particularly fruits and vegetables.
- the device 1 envisaged uses ultrasonic waves of very high frequency, preferably megasons, without ever reaching high cavitation.
- the ultrasonic transducer 3 according to the invention is preferably composed of at least one piezoelectric ceramic. More preferably, the ultrasonic transducer 3 is composed of a set of piezoelectric ceramics.
- the family of piezoelectric ceramics contains many elements, such as in particular barium titanates (BaTiO3) or Lead Zircono Titanates (PZT or LZT for Lead Zirconate Titanate), which are the most widespread and which alone six different compositions.
- the ceramics used are PZT ceramics (Titano-Lead Zirconate) such as ceramics PZT-4, PZT-5 or PZT-8. More preferably, the ceramics used are ceramics intended for acoustic emission having a quality factor greater than 500 such as PZT-5.
- the ultrasonic transducer 3 which is preferably a set of piezoelectric ceramics, may be arranged on the outer and / or inner walls of the enclosure 2.
- Piezoelectric ceramics can be present on any type of wall, both horizontal walls and vertical walls.
- the waves are well distributed in the chamber 2 thanks to the fact that the ceramics 3 are placed homogeneously on the walls of the tank. All the walls of the enclosure 2, which is preferably a tank, can be equipped. Preferably, the piezoelectric ceramics 3 are present on one, two, three, four or five walls of the enclosure 2.
- ceramics of small sizes that is to say less than 10 cm and preferably between 2 cm and 4 cm are used. This allows optimal paving. Their shape is usually circular or polygonal. Each ceramic is powered by an independent generator calibrated on the resonance frequency of the ceramic.
- each ceramic has its own resonance frequency.
- Two ceramics of the same batch do not have the same resonance frequency.
- the ultrasonic transducer 3 which is preferably a set of ceramics, preferably comprises an adjustment module 7.
- each ceramic when each ceramic is powered by its own electronics, a random phase shift is created by said adjustment module 7.
- the ceramics are previously desynchronized, thus avoiding the appearance of stationary waves and allowing to have a diffuse field.
- the adjustment module 7 of the transducer 3, which is preferably made of piezoelectric ceramics, is an electronic power card.
- each piezoelectric ceramic is preferably powered by an electronic power card providing an AC voltage corresponding to its own mode of vibration.
- the shape and material of the diffractor are adapted to the desired acoustic directivity.
- a hydrophone immersed in the tank advantageously makes it possible to constantly monitor the presence of cavitation. Indeed the implosion of cavitating bubbles generates a characteristic frequency spectrum. Thus, upon detection of cavitation presence, the acoustic power is reduced until the cavitation phenomenon is no longer detected by hydrophone 21.
- the device which is the subject of the invention advantageously comprises an immersed hydrophone 21.
- the circles 31 of the ultrasonic transducer 3 represent an acoustic diffraction device.
- the device according to the invention preferably comprises a gasification system of the treatment or cleaning liquid, not shown in the figures, advantageously comprising a semipermeable membrane.
- the gas is preferably introduced through a semipermeable membrane separating the gas to be dissolved and the treatment or cleaning liquid.
- the nature of the gas is adapted to the product to be treated, cleaned and / or decontaminated. For example a mixture of nitrogen, oxygen and carbon dioxide, taken alone or as a mixture, in which the concentrations chosen make it possible to limit breathing.
- the gas dissolved in the treatment or cleaning liquid may, for example, be treated in a sonochemical reactor and, depending on its nature, may contribute to the destruction of microorganisms.
- the high frequency acoustic waves make it possible in particular to eliminate, by limiting the damage to the products to be treated, clean and / or decontaminate, even the most fragile micro-organisms (bacteria, viruses, fungi), organic molecules (various deposits, pesticides) present on the surface and in the microcracks of the products.
- micro-organisms bacteria, viruses, fungi
- organic molecules variable deposits, pesticides
- This effect applies to all situations where microbiological or chemical decontamination is necessary or can be helpful. It can also be used to remove unwanted products from plants (eg oxidation products) during various agro-processing processes, for example.
- the acoustic waves by creating convection movements, promote the circulation of the treatment liquid or cleaning, preferably water. They therefore have a homogenizing effect of the aqueous media in contact with the products to be treated, clean and / or decontaminate.
- the device can also be used to avoid the creation of concentration gradient (in plant culture substrates in hydroponics, for example, in washing water during agrifood processes). It can also be used in all cases where improved wettability improves the process (eg germination of seeds, absorption of water or any other substance).
- the number of surface sites, in which the weak cavitation appears is increased by the introduction of dissolved gases into the treatment or cleaning liquid.
- the gas is introduced through a semi-permeable membrane separating the gas to be dissolved and the treatment liquid or cleaning.
- the nature of the gas is adapted to the matrix to be treated.
- the gas dissolved in the treatment or cleaning liquid is generally neutral and has an effect on the number of cavitation sites. It may also, depending on its nature, contribute to the effectiveness of treatment.
- pollutant particle (s) to be destroyed present on the products to be treated include for example microorganisms, bacteria, fungi, viruses, pesticides, fungicides, or solid particles.
- the Applicant has been able to highlight that, in spore form, fungi are very resistant to many decontamination processes (chemical decontaminants, UV radiation).
- the device which is the subject of the invention makes it possible to eliminate from the surface both the sporulated forms of the fungi and the non-sporulated forms.
- the device 1 according to the invention thus also allows to unhook the polluting particles, which will be in suspension or in solution in the treatment liquid or cleaning 6 if the particle is soluble.
- the soiled cleaning liquid 6 flows in the tank from bottom to top and overflows the vessel.
- the device which is the subject of the invention comprises a flow circuit for the treatment or cleaning liquid.
- Said circuit comprises at least one additional additional module chosen from a sonochemical reactor 8, a weir 9, a filter 10 and / or a circulation pump 11.
- the device according to the invention and / or the flow circuit of the treatment or cleaning liquid of said device comprises a sonochemical reactor 8.
- the sonochemical reactor 8 allows in particular the mineralization of all the organic substances present in the aqueous medium. It therefore advantageously destroys both organic molecules (such as pesticides, fungicides, ...) that microorganisms (viruses, fungi in spore form or not, bacteria). It is preferably used in addition to acoustic waves in all cases where the substances resulting from acoustic treatment, must be eliminated. It is thus particularly useful for example for the recycling of process water.
- the Applicant has been able to demonstrate that when the device according to the invention further comprises a sonochemical reactor, it makes it possible to have multiple applications in various sectors of agronomy and agro-food.
- the device is particularly suitable for the processing of fruit and vegetables for the fresh market and agri-food processing, but it is also suitable for growing above ground.
- the device allows the elimination of microorganisms and surface chemicals and contributes to the sanitary quality of products for fresh storage and agri-food processing.
- the device allows the homogenization of nutrient solutions (acoustic megasons) and the reduction of the formation of biofilms on the culture supports.
- the mineralization (sonochemistry) of the organic matter and the microorganisms of the nutritive solutions is ensured by the sonochemical reactor, which has an effect on the sanitary quality of the cultures and allows the recycling of the waters.
- the device also has effects on the physiology of plants: by eliminating the microgradients of concentrations in the very near neighborhood of roots, it facilitates the absorption of water and / or nutritive solutions and thus improves the growth of plants.
- the sonochemical reactor 8 is essentially intended to produce the active ingredients necessary for the destruction of microorganisms and / or pesticides.
- This reactor 8 is preferably located in the flow circuit or in a circulation loop of the cleaning device.
- the sonochemical reactor 8 is an enclosure comprising a liquid inlet and an outlet.
- ultrasonic waves "cavitate" dirty water (strong cavitation). Indeed, it has been shown that acoustic cavitation results in the creation of microbubbles of dissolved gas, the oscillation of these bubbles leads to their implosion. This implosion is reflected in the vicinity of the bubble by overpressures (of the order of 500 atm), solar temperatures (2000 ° C to 5000 ° C) and UV light radiation.
- the sonochemical reactor 8 also allows the creation of free radicals OH- according to the reaction:
- sonochemical reactors 8 that can be used according to the invention, mention may be made of Langevin-type transducers such as the model STC 8HS 3528 manufactured by Sunnytech piezoelectric technology. This model consists of two piezoelectric discs 5 mm thick, 35 mm outer diameter and 5 mm inner diameter mechanically connected in series and electrically in parallel. These discs are compressed between two metal masses. On the one hand, they are in contact with an aluminum metal cone 35 mm in diameter on the ceramic side, 55 mm in diameter on the other side and 40 mm in length. On the other side, they are bounded by a stainless steel cylinder 35 mm in diameter and 18 mm long. The entire structure is maintained by a screw Ml 0 which passes through the component.
- a screw Ml 0 which passes through the component.
- the flow circuit of the treatment or cleaning liquid of said device further comprises one or more filters 10, 12, which are advantageously:
- porous filter 10 for the filtration of large particles and / or
- the porous microparticle filter 12 of the device according to the invention comprising a sonochemical reactor 8 advantageously makes it possible to obtain a recirculation water that is potable and capable of treating, cleaning and / or decontaminating the food after passing through said reactor. Indeed, the solid particles are stopped by the filter (s) 10, 12, whereas the organic substances are preferentially destroyed by the sonochemical reactor 8.
- the filter or filters 10, 12 used according to the invention are chosen from carbon filters.
- the filter 10, 12 is not a cold-plasma activated carbon filter such as the 02PRO TM module developed by Cartis TM.
- the flow circuit of the treatment or cleaning liquid of the device may also contain an evacuation system which is advantageously a weir 9 and / or a circulation pump 11.
- the device according to the invention and / or the flow circuit of the treatment liquid or cleaning said device further comprises a weir 9.
- the weir 9 is a structure allowing to divert or evacuate the treatment liquid or 6 behind a winnowing or fixed dam, the height of which exceeds a certain limit.
- the device according to the invention and / or the flow circuit of the treatment or cleaning liquid of said device further comprises a circulation pump 1 1.
- Said circulation pump 1 1 is mainly intended to force the circulation of the treatment or cleaning liquid.
- the flow circuit of the treatment or cleaning fluid of the device which is the subject of the invention comprises two modules chosen from a sonochemical reactor.
- the invention relates to a device coupled with high frequency acoustic waves, sonochemistry and dissolved gas inputs which advantageously applies to post harvest processing of fruits, vegetables (leaves, roots, tubers, bulbs) and seeds (cereals, legumes and others); to above-ground crops, nurseries or in vitro culture.
- the device can be used at all stages of plant development (seed germination, explant development, vegetative growth and fruit formation and development). In the food industry, the device can also be applied to meat products, fish and may have applications in the dairy industry.
- the flow circuit of the treatment or cleaning liquid of the device which is the subject of the invention comprises three modules chosen from a sonochemical reactor 8, a filter 1 0, 1 2, a weir 9, and a circulation pump 10.
- the device according to the invention and / or the flow circuit of the treatment or cleaning fluid of said device comprise all of the following elements: a gasification system for the treatment or cleaning liquid 6,
- the device that is the subject of the invention also has the advantage of reducing the consumption of treatment or cleaning liquid or of water that is useful for treating, cleaning and / or decontaminating the products.
- the interest is particularly present for the washing of certain vegetables such as salads with a device comprising a closed flow circuit.
- tanks 2 can be used with larger or smaller volumes.
- the device of the invention allows the treatment of products or organisms, preferably food, by high frequency acoustic waves.
- the invention thus also relates to the use of a device according to the invention, for the treatment of a plant or for the treatment, non-therapeutic, of an animal, inserted into the enclosure.
- treatment is understood to mean the modification of the product, the food or the organism to be treated, for example cleaning, stimulation, decontamination, sterilization, solubilization or mineralization, with the exception of therapeutic treatment of an animal.
- the device of the invention has applications also in the infant food ("baby food” in English) for which the regulation prohibits the use of pesticides (heavy metals, nitrates, ...) or decontamination products (quaternary ammonium, chlorate ).
- the device of the invention is associated with additional modules, not shown in the figures, allowing for example the control of raw materials, washing, peeling, removal of unwanted pieces by a refiner, the preparation of the recipe , packaging, encapsulation for example by steam jet, sterilization or pasteurization, control, and / or coding for traceability.
- the device object of the invention finds applications also in the value chain of marketing meat such as poultry.
- the device which is the subject of the invention is then optionally associated with modules additional, not shown in the figures, allowing for example the attachment, anesthesia or bleeding of animals, the opening of the pores to facilitate plucking (scalding tank), plumage, evisceration and / or cutting some members, internal and external washing, and / or conditioning.
- the device which is the subject of the invention has applications also in above-ground cultures, in particular for actively combating the appearance of biofilms.
- the invention also relates to the use of the device for the treatment of food inserted in the enclosure, preferably plant foods.
- the device according to the invention is used for cleaning and / or decontaminating food inserted in the enclosure (2), preferably plant foods.
- the plants to be decontaminated are preferably selected from fruits, vegetables, seeds, tubers or any part of an edible plant.
- the device that is the subject of the invention is also particularly suitable for plants that are sensitive to transport desiccation, intended for the fourth range, the soil and fruits to be peeled. Plants cleaned and / or decontaminated with the device according to the invention advantageously have a longer life and improved quality.
- the device can be used for the treatment of food of animal origin inserted in the enclosure.
- the device is particularly suitable for brining food, preferably brining food of animal origin, more preferably still ham.
- the fluid By exciting the interface by an acoustic wave, the fluid is constantly renewed, the migration of active molecules will then be increased since in this case the concentration of active product is fixed at its initial value and it is invariable in time. The overall result is to reduce the treatment time to reach the desired dosage.
- the Applicant has been able to demonstrate that the use of brine in the tank or chamber 2, followed by a food treatment by the device according to the invention, in particular reduces the brining time.
- the Applicant has also been able to demonstrate that the device which is the subject of the invention makes it possible to modify the metabolism of an organism, an organ or a tissue, preferentially the modification ex vivo when the organism, organ or the tissue is inserted into the chamber 2.
- An organism according to the invention is a complex, organized system, which is the product of successive variations during evolution. It consists of one or more cells (unicellular or multicellular organism).
- an organ is a set of specific tissues of an organism capable of performing one or more specific functions.
- a living tissue is the intermediate level of organization between the cell and the organ.
- a fabric forms a functional whole, that is to say that its cells contribute to the same function.
- the organism, organ or tissue is of animal or plant origin.
- the Applicant has in particular been able to show that the device made it possible to create on the plants tensile forces in the boundary layer of certain plants.
- the adsorption of molecules or macromolecules on the cell surface will also be modified by the device according to the invention.
- the device according to the invention can therefore be used to modify the exchanges between the organisms, the organs or the tissues 4 and the treatment liquid 6.
- the device which is the subject of the invention thus makes it possible to modify the metabolism of an organism, an organ or a tissue, preferentially the modification ex vivo when the organism, organ or tissue is inserted into the chamber 2, said modification allowing for example the neosynthesis of primary and / or secondary metabolites.
- the device according to the invention can thus advantageously be used to modify the metabolism of organisms, organs or tissues either by stimulating or by repressing the synthesis of cellular compounds.
- the device according to the invention can be used to modify the metabolism of an organism, an organ or a tissue by stimulating its growth.
- the organism is a plant organism
- the organ is a plant organ
- the tissue is a plant tissue.
- the device according to the invention can also be used to increase the defenses of a plant organism, a plant organ or a plant tissue, in the face of infection by a pathogenic agent which is preferably a fungus.
- the Applicant has been able to demonstrate that root treatment by the device according to the invention stimulates the growth of plants and increases the defenses of the leaves against infection by a pathogenic fungus.
- These two examples show that the effects of the treatment are not limited to the organ treated, but induce an overall systemic response of the plant and a change in metabolism.
- the invention finally relates to a method of cleaning and / or decontamination by high frequency acoustic waves, characterized in that it comprises the following steps according to which:
- a product to be cleaned and / or decontaminated 4 by at least one polluting particle is introduced into an enclosure 2 which is preferably an overflow tank;
- High frequency acoustic waves greater than 100 kHz, preferably greater than 200 kHz are generated in said chamber 2 by an ultrasonic transducer 3;
- the acoustic waves propagate in the chamber 2 and reach the product to be cleaned and / or decontaminated 4;
- the object of the invention is a method for cleaning and / or decontaminating a product by using the device according to the invention described above.
- the process is characterized in that the enclosure 2 comprises a cleaning liquid 6 and in that said process comprises an additional treatment step, by a flow circuit of the cleaning liquid soiled and loaded with pollutant particles.
- the cleaning liquid contaminated with pollutant particles is passed through a filter 10;
- the liquid thus filtered enters a recirculation pump 1 1 and then into a sonochemical reactor 8 of frequency between 40 kHz and 400 kHz, in which the polluting particle is destroyed;
- the liquid free of polluting particle is either reintroduced into the chamber 2, or introduced into a secondary circuit 13.
- the cleaning liquid soiled and loaded with polluting particles may be introduced into a secondary circuit as of the first step above, that is to say before the optional step of passage through a filter 10.
- the method may further comprise an additional step of filtering the cleaning liquid by a microparticle filter 12.
- the method which is the subject of the invention preferably comprises a step of desynchronization of the piezoelectric ceramics of the ultrasonic transducers 3 which makes it possible to avoid the formation of stationary waves and to obtain a diffuse field.
- Example 1 Effects of a treatment by measons on the cleaning and decontamination of salads
- the plant decontamination tests were carried out on a typical leaf vegetable, the salad for a fourth-level preservation.
- the lettuce leaves are removed and placed in a sterile STOMACHER TM bag, under sterile air in a laminar flow hood, in a solution of tryptone-salt (18g.L->) which contains 0.2% tween 80 (2- [2- [3,4-bis (2-hydroxyethoxy) oxolan-2-yl] -2- (2-hydroxyethoxy) ethoxy] ethyl octadec-9-enoate.
- tryptone-salt solution mixture of tryptone and sodium chloride
- Tryptone Sel (or Peptone Sel) medium is a low peptone isotonic diluent used for dilutions in food or cosmetic analyzes.
- the ratio of amount of vegetable matter to tryptone-salt solution was optimized to 10 g of material per 90 ml of solution.
- the sample is then milled in a STOMACHER TM mill with alternating blade movements, which allows homogenization of the samples directly in sterile bags.
- a sample of the grinding solution is then inoculated into a petri dish in order to count the microorganisms.
- Three different nutrient media are used:
- This medium is preferably adapted to the mushroom culture and is composed of glucose potato extract and bacteriological agar agar.
- This medium is preferably adapted to the culture of bacteria and contains yeast extract, enzymatic digestion of casein, glucose and bacteriological agar agar.
- Glucamphenicol and glucose agar medium consisting of 5g of yeast extract, 20g of glucose, 0.1 g of chloramphenicol, 15g of agar per liter of solution, this medium does not allow bacterial growth. All media are autoclaved at 121 ° C for 15 min. The grinding solution is then diluted 10 " to 10 " . Seeding is carried out in petri dishes containing PDA and PCA media at the rate of ⁇ ⁇ of the grinding solution or the diluted solution, per dish. Each seeding is repeated three times. The boxes are isolated from the outside by PARAFILM TM and are incubated at 25 ° C for 72h.
- N ⁇ colonies / Vml x (n 1 +0.1 n 2) x d 1
- N number of CFU per gram or per ml of initial product
- Vml volume of solution deposited (0.1 ml)
- ni number of boxes considered at the first dilution selected
- n2 number of boxes considered at the second dilution retained
- results are presented as mean with standard deviation and the analysis of variance (ANOVA) is used as a statistical test.
- a cleaning device and / or decontamination as shown in Figure 1b is used.
- High frequency acoustic waves are applied during washing and used in order to pick up polluting particles such as microorganisms located mainly on the surface of plant foods, which are in this case salads, variety lettuce butter .
- the ceramics of the device used have a resonance frequency of about 1.6 MHz.
- the diameter of ceramics is 20mm.
- the individual power is about 30W per ceramic.
- salads, lettuce butter variety are trimmed, cut, and then soaked for 3 minutes in a chlorine solution (80 ppm). They are then rinsed for 5 minutes, wrung out and stored in sachets at 6 ° C for 7 days.
- the permeability of the used sachets makes it possible to obtain an internal atmosphere comparable to that of the air, this in order to avoid that an atmosphere enriched in CO2 can slow down the development of microorganisms.
- the tests (not included in this example) have shown that the preferred duration of treatment is between 0.5 and 5 minutes.
- the results were obtained with a mega-treatment time of 3, 6 or 12 minutes, a rinse time of 5 minutes, a rinse rate of 0.5 L / min and a lettuce load of 65. g / L.
- Microbiological analyzes were performed before bagging and after 3 and 7 days of storage.
- Figure 2 compares bacterial contamination of lettuce after washing with water, chlorine and after treatment with megas in water for three minutes.
- the letters a and b indicate that the results are significantly different - Mann and Whitney test threshold of significance 5%)
- the quality of the fourth row lettuce is not modified by the treatment with megasons and this throughout the shelf life.
- megasons are an alternative to using chlorine for fourth-range transformation processes.
- the use of the device according to the invention not only allows effective decontamination and comparable to chlorine, but it avoids the problems associated with such use of chlorine which can lead to the appearance of toxic chlorate residues or by-products such as trihalomethanes, methylene bromides and other molecules considered to be toxic in the diet.
- the use of the device according to the invention makes it possible to maintain the initial quality of the products.
- Example 2 Effects of a treatment by measons on the decontamination of apples and strawberries
- the plant decontamination tests were carried out on two types of fruit, the shape of the epidermis is very different, the apple and the strawberry.
- Example 1 As for the lettuce leaves of Example 1, the epidermis of apples or whole strawberries are removed and placed in a sterile STOMACHER TM bag. The methodology for determining the microbiological contamination of fruits is identical to that described in Example 1 above.
- a cleaning device and / or decontamination as shown in Figure 1b is also used.
- High frequency acoustic waves are applied during washing and used in particular to pick up polluting particles such as microorganisms located mainly on the surface of foods that are in this case apples and strawberries.
- the ceramics of the device used have a resonance frequency varying between 1.5 MHz and 2.5 MHz.
- the diameter of ceramics is 20mm.
- the individual power is about 30W per ceramic.
- Apples and strawberries were treated substantially under the same conditions as those described in Example 1.
- the negative control of this example is the unwashed fruit. It is compared with washing with water and treatment with the device according to the invention as illustrated in FIG.
- Chlorine is not used in this example because it does not enter the processes of washing fruit for consumption or preservation in fresh.
- the results of the study are shown in Table 1 below, which compares the microbial load (log (cfu) / 10g) of apples and strawberries before washing, after washing with water for three minutes and after treatment. by the system with megasons for three minutes.
- the letters a and b indicate that the results are significantly different - Mann and Whitney test threshold of significance 5%
- Table 1 Microbial load of apples and strawberries before washing and after washing with water and after a treatment according to the invention
- the device according to the invention makes it possible in particular to improve the decontamination of fruits of a CFU Log and can be applied to all fruits and vegetables.
- the Applicant has shown that the device object of the invention could also be used to homogenize the hydroponic culture media, limit the accumulation of exudates in the vicinity of the roots and thus promote the absorption of water and mineral salts. Homogenization also makes it possible to limit the appearance of biofilms.
- the invention can be used provided that it does not have negative effects on the growth of the plants.
- Example 3 was therefore performed to determine the effects of megasons on plant growth.
- a batch of 30 young cotyledonary stage lettuce plantlets were treated with megas for five minutes.
- the height of the plants and the number of leaves 10 and 20 days after the treatment are shown in Table 2 below.
- the letters a and b indicate that the results are significantly different - Mann and Whitney test threshold of significance 5%.
- Table 2 Height and number of seedling leaves of lettuce treated according to the invention for five minutes at the cotyledonary stage Duration of 10 days after treatment 20 days after culture treatment
- the treatment with the device object of the invention stimulates the growth of plants and their tolerance vis-à-vis various biotic and abiotic stresses. This effect is maintained until twenty days after treatment.
- Example 4 Process for decontaminating plant foods by high frequency acoustic waves according to the invention
- the decontamination process uses the device that is the subject of the invention as illustrated in FIG. 1b.
- the cleaning phase is provided by megasonic waves (frequencies greater than or equal to 1 MHz) coupled with a dissolved gas supply.
- the decontamination phase is performed by traditional acoustic frequency of the order of 40 kHz to 400 Hz.
- the method comprises the following steps wherein:
- plant foods 4 possibly contaminated with at least one pollutant particle are immersed in an overflow tank comprising a cleaning liquid 6 and megasonic acoustic wave sources 3 with a frequency greater than or equal to 1 MHz;
- the propagation of megasons creates spatial and temporal alternations of compression and depression that are able to mechanically stress the plant foods to decontaminate and unhook the pollutant particle (s) from the food;
- the mechanical effect according to d) is amplified by low cavitation when the polluting particle (s) is associated with a trapped air bubble at the moment when the plant foods have been immersed in the tank in that the acoustic wave vibrates and changes the volume of said air bubble and destabilizes the polluting particle (s) which is unhooked; the dissolved gas favors the appearance of cavitation sites;
- a recirculation pump 1 1.
- the tank 2 is an overflow cleaning tank containing the plants to be cleaned 4, the plants are fully immersed in the cleaning liquid.
- the cleaning liquid arrives from the bottom of the tank 2. Thus a flow is established from the bottom to the top of the tank.
- the liquid fills the tank and then overflows on the upper edges of the tank in a weir 9.
- the soiled liquid 6 is then filtered by the porous filter 10.
- the circulation of the liquid 6 is ensured by the pump 1 1.
- the liquid 6 freed of particles enters the sonochemical reactor 8 where acoustic cavitation destroys microorganisms and pesticides.
- the liquid 6 may advantageously enter a gasification device equipped with a semi-permeable membrane, the gas dosage is managed by the pressure exerted on the gas.
- the liquid 6 returns to the cleaning tank 2 freed from any pollutant and possibly gasified.
- the recirculation flow rate is adapted to the acoustic performance of the cleaning tank 2 and to the performance of the reactor 8.
- the cleaning liquid 6 preferably chosen is water, it is optionally possible to add soluble products or to dissolve gases therein.
- the ceramics generating the acoustic waves in the tank 2 may be glued to the inner or outer walls of the tank. Alternatively, a removable and immersible device is also possible.
- Each piezoelectric ceramic is powered by a power electronic card 7, providing it with an alternating voltage corresponding to its own mode of vibration.
- the acoustic field generated which propagates in the cleaning liquid 6 is homogeneous, the plants immersed in the liquid 6 are uniformly insonnified, so that the flipping of the plant foods to be decontaminated is less preponderant.
- the cleaning efficiency is such that the treatment is done under standard conditions 20 ° C, atmospheric pressure.
- the duration of the cleaning cycle is short, which allows to consider an online treatment.
- Example 5 Effect of treatment by meason on tolerance of lettuce leaves to infection with Botrytis cinerea. Lots of young cotyledonary stage, and five leaf, lettuce plantlets were treated with the device for five minutes.
- Treatment with the device was performed at the cotyledonary stage and at the five-leaf stage two days prior to contact with the fungus.
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Nutrition Science (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Zoology (AREA)
- Wood Science & Technology (AREA)
- Environmental Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Botany (AREA)
- Soil Sciences (AREA)
- Ecology (AREA)
- Forests & Forestry (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
- Catching Or Destruction (AREA)
- Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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FR1770057A FR3061836B1 (fr) | 2017-01-17 | 2017-01-17 | Dispositif et procede de nettoyage et/ou de decontamination d’aliments par des ondes acoustiques de haute frequence |
FR1771277A FR3061835B1 (fr) | 2017-01-17 | 2017-11-29 | Dispositif et procede de traitement par des ondes acoustiques de haute frequence |
PCT/EP2018/050944 WO2018134181A1 (fr) | 2017-01-17 | 2018-01-16 | Dispositif et procede de traitement par des ondes acoustiques de haute frequence |
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EP3570684A1 true EP3570684A1 (fr) | 2019-11-27 |
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EP18700419.7A Withdrawn EP3570684A1 (fr) | 2017-01-17 | 2018-01-16 | Dispositif et procede de traitement par des ondes acoustiques de haute frequence |
Country Status (5)
Country | Link |
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US (1) | US20200205446A1 (fr) |
EP (1) | EP3570684A1 (fr) |
CA (1) | CA3049999A1 (fr) |
FR (2) | FR3061836B1 (fr) |
WO (1) | WO2018134181A1 (fr) |
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US9392805B2 (en) * | 2013-01-16 | 2016-07-19 | 1,4 Group, Inc. | Methods for applying a liquid crop-preservative formulation to a container |
US11700794B2 (en) * | 2020-07-16 | 2023-07-18 | The Human Connexion, Llc | Plant growth via vibrations |
US11986566B2 (en) | 2020-11-02 | 2024-05-21 | Raytheon Company | System and method for decontamination of materials |
CN112890243B (zh) * | 2020-12-25 | 2022-04-29 | 杭州娃哈哈精密机械有限公司 | 一种清洗湿桂圆肉的输送分离装置及其使用方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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US5834871A (en) * | 1996-08-05 | 1998-11-10 | Puskas; William L. | Apparatus and methods for cleaning and/or processing delicate parts |
FR2785558B1 (fr) * | 1998-11-06 | 2001-01-12 | Michel Pierre Bernard Bourdat | Machine de nettoyage pour des plaques, notamment des pochoirs de serigraphie |
US7443079B2 (en) * | 2004-09-17 | 2008-10-28 | Product Systems Incorporated | Method and apparatus for cavitation threshold characterization and control |
JP4442383B2 (ja) * | 2004-10-12 | 2010-03-31 | 国立大学法人 東京大学 | 超音波洗浄装置 |
US20100319725A1 (en) * | 2009-06-18 | 2010-12-23 | Nano Om Technology, Llc | Systems, methods, and compositions for sanitizing food products |
WO2016016873A1 (fr) * | 2014-08-01 | 2016-02-04 | Indian Products Limited | Procédé d'élimination de contaminants à partir de produits agricoles et appareil associé |
-
2017
- 2017-01-17 FR FR1770057A patent/FR3061836B1/fr active Active
- 2017-11-29 FR FR1771277A patent/FR3061835B1/fr active Active
-
2018
- 2018-01-16 WO PCT/EP2018/050944 patent/WO2018134181A1/fr unknown
- 2018-01-16 CA CA3049999A patent/CA3049999A1/fr active Pending
- 2018-01-16 EP EP18700419.7A patent/EP3570684A1/fr not_active Withdrawn
- 2018-01-16 US US16/478,757 patent/US20200205446A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
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CA3049999A1 (fr) | 2018-07-26 |
US20200205446A1 (en) | 2020-07-02 |
FR3061836A1 (fr) | 2018-07-20 |
FR3061836B1 (fr) | 2021-06-04 |
FR3061835B1 (fr) | 2021-08-06 |
FR3061835A1 (fr) | 2018-07-20 |
WO2018134181A1 (fr) | 2018-07-26 |
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