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WO1990002572A1 - Gas scrubber for produce storage - Google Patents

Gas scrubber for produce storage Download PDF

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Publication number
WO1990002572A1
WO1990002572A1 PCT/AU1989/000389 AU8900389W WO9002572A1 WO 1990002572 A1 WO1990002572 A1 WO 1990002572A1 AU 8900389 W AU8900389 W AU 8900389W WO 9002572 A1 WO9002572 A1 WO 9002572A1
Authority
WO
WIPO (PCT)
Prior art keywords
ethylene
ozone
atmosphere
produce
catalyst
Prior art date
Application number
PCT/AU1989/000389
Other languages
French (fr)
Inventor
Mark Anthony Cammiss
Gaetano Russo
Original Assignee
Mark Anthony Cammiss
Gaetano Russo
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mark Anthony Cammiss, Gaetano Russo filed Critical Mark Anthony Cammiss
Publication of WO1990002572A1 publication Critical patent/WO1990002572A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A61L2/08—Radiation
    • A61L2/10—Ultraviolet radiation
    • 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
    • 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
    • A23B7/144—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of gases, e.g. fumigation; Compositions or apparatus therefor
    • 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
    • A23B7/144—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of gases, e.g. fumigation; Compositions or apparatus therefor
    • A23B7/152—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere comprising other gases in addition to CO2, N2, O2 or H2O ; Elimination of such other gases
    • 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
    • A23B7/157—Inorganic compounds

Definitions

  • This invention relates to an apparatus that increases the storage life of produce such as fruits, vegetables and cut flowers by destroying bacteria, fungi and harmful gases such as ethylene from the atmosphere surrounding the produce.
  • ethylene is a natural hormone produced by the produce as it ages.
  • the effects of ethylene are to initiate and increase the rate of aging and give a diseased appearance in produce if it is present in high concentrations. It has been known for many years by Post Harvest researchers that the aging of produce can be significantly reduced by maintaining low ethylene concentrations in the atmosphere surrounding the produce.
  • the prior art in scrubbing ethylene from produce storage rooms consists of potassium permanganate scrubbers in which the active ingredient potassium permanganate is absorbed on a silicate or activated alumina base and the potassium permanganate oxidises ethylene into harmless carbon dioxide and water.
  • Another prior art ethylene scrubber uses a high temperature catalyst to catalytically oxidise ethylene into carbon dioxide and water.
  • Potassium permanganate scrubbers suffer from high operating costs, reduced ethylene scrubbing performance as the active ingredient is consumed and the fact that bacteria and fungi are not effectively controlled.
  • Catalytic oxidation scrubbers suffer from high capital and operating costs and the limitation of destroying only the bacteria and fungi passing through the scrubber rather than destroying bacteria.and fungi present on the surface of the produce and on surfaces within the storage room.
  • SHEET Most fruits, vegetables and cut flowers are attacked and destroyed by bacteria and fungi and many methods are used in the post harvest storage and transport of produce to reduce spoilage due to bacteria and fungi.
  • the methods include a large number of chemical dips and sprays, the use of ozone as a powerful oxidising agent and the use of ultraviolet lights.
  • the object of this invention is to provide an ethylene scrubber that also effectively destroys bacteria and fungi in the atmosphere surrounding the produce and on the produce surfaces.
  • the invention comprises an apparatus that combines the effects of ultraviolet lights emitting radiation at desired wavelengths for ethylene destruction and an ozone destruction catalyst to control the ozone concentration in a produce storage room at a predetermined level.
  • the apparatus consists of an enclosure that contains a fan to circulate the atmosphere from a produce storage room past one or more ultraviolet lights. As the atmosphere passes- the lights, bacteria, fungi and ethylene are destroyed and ozone is produced. Excessive levels of ozone in the storage room can be harmful to some produce and a bed of catalyst is provided to reduce the ozone concentration to levels that destroy bacteria and fungi but do not damage the produce. By this means, the apparatus can maintain a desired level of ozone within the storage room atmosphere and this ozone can destroy bacteria and fungi on the produce surfaces on a continuous basis. The desired ozone level is in the range 0.1 to 10 vol ppm and varies with the type of produce and bacteria or fungi to be controlled.
  • the ethylene concentration .in the surrounding atmosphere should be kept below 1 ppm to prolong storage life whereas ' for some fruits and most vegetables and cut flowers, the ethylene concentration
  • ultraviolet lights that are manufactured are designed to emit most of their energy at the 254 nm wavelength.
  • ultraviolet radiation at this wavelength is ineffective at destroying ethylene whereas ultraviolet radiation at 185 n is highly effective at destroying ethylene.
  • specially designed and manufactured mercury vapour lights which emit much of their radiation at 185 nm with the remainder predominantly at 254 nm effectively destroy ethylene.
  • the ultraviolet lights which emit strongly at 185 nm produce large amounts of ozone from oxygen in the circulated atmosphere. It is believed that photons of ultraviolet radiation, oxygen free radicals and ozone all contribute to the destruction of bacteria, fungi and ethylene as the atmosphere passes through the apparatus. Emission of 254 nm wavelength radiation is particularly effective at destroying bacteria.
  • Ozone is a highly reactive unstable gas. It will oxidise many things including bacteria, fungi, ethylene and complex odour molecules. Depending on conditions within a storage room such as temperature, humidity and room contamination, the half life of ozone in the storage room atmosphere will be between 5 and 30 minutes.
  • the apparatus has a bed of catalyst that rapidly converts ozone into harmless oxygen.
  • the ozone concentration leaving the apparatus can be altered by varying the catalyst bed height.
  • Many types of catalyst were tested in experiments by the Inventors. The best catalyst was found to be pellets of ferro manganese aluminium oxide with particle sizes in the range 1 to 10 mm mean diameter.
  • the composition of the catalyst is as follows:
  • Atmosphere from the produce storage room enters the apparatus via the inlet nozzle (1 ) .
  • the atmosphere may be air or may be air modified to controlled atmosphere storage conditions.
  • the atmosphere flows through a channel (2) and past one or more ultraviolet lights (3).
  • the ultraviolet lights are powered by transformer ballasts (4).
  • the atmosphere then flows through another channel (5) and through a catalyst support grate (6).
  • the channels and grate are sized to minimize the pressure drop of the flowing gas.
  • the atmosphere then passes through the catalyst bed (7).
  • the size of the catalyst pellets and the height of the catalyst bed are determined by the flow rate of atmosphere, the inlet concentration of ozone, the desired outlet concentration of ozone and the head characteristics ' of the fan.
  • Catalyst pellets can be in the size range 1mm to 10mm mean diameter but more preferably in the range 5mm to 10mm mean diameter.
  • a fan (8) is used * to circulate the atmosphere from the storage room through the apparatus. Atmosphere leaves the apparatus via the outlet nozzle (9).
  • the inlet nozzle (1) and outlet nozzle (9) may be connected to piping to allow the apparatus to be located outside of and remote from the storage room.
  • a lid (10) is bolted to the main body (11) of the apparatus and can be removed for access to components and catalyst.
  • a gasket seal (12) is provided between the lid and the main body to ozone and ethylene bypass within the apparatus.
  • An electric control box (13) is provided to operate the apparatus.
  • a pressure switch (14) is provided which turns the ultraviolet lights off if flow through the apparatus falls below predetermined value. This is a safety measure to prevent excessive ozone from entering the storage room should the fan fail.
  • An access panel (15) is provided to install the ultraviolet lights.
  • the design of the apparatus provides automatic weatherproofing of the fan, lights and ballasts.
  • the use of granular catalyst of the type disclosed permits a compact design. Because the fan is inside the apparatus and gasket seals are used, the apparatus is suitable for use in controlled atmosphere stores where leaks must be minimized.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Polymers & Plastics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Food Science & Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Storage Of Fruits Or Vegetables (AREA)
  • Storage Of Harvested Produce (AREA)

Abstract

The invention relates to an apparatus which achieves the destruction of ethylene, bacteria, fungi and odours in the atmosphere of fresh fruit and vegetable storage rooms and also causes the admission of controlled amounts of ozone into the said rooms to provide surface sterilization of the produce without impairing their keeping qualities. The apparatus is depicted in Figures 1 to 3. These figures illustrate the orientation of the essential elements of the invention, principally ultraviolet light source(s); ozone destruction catalyst and circulating fan in an enclosure with means of attachment of the apparatus to the fruit and vegetable storage room for the purpose of circulating the storage room atmosphere through the enclosure past the elements of the invention in the order given above.

Description

GAS SCRUBBER FOR PRODUCE STORAGE
This invention relates to an apparatus that increases the storage life of produce such as fruits, vegetables and cut flowers by destroying bacteria, fungi and harmful gases such as ethylene from the atmosphere surrounding the produce.
Most fruits, vegetables and cut flowers are affected by the hydrocarbon known as ethylene which is a natural hormone produced by the produce as it ages. The effects of ethylene are to initiate and increase the rate of aging and give a diseased appearance in produce if it is present in high concentrations. It has been known for many years by Post Harvest Researchers that the aging of produce can be significantly reduced by maintaining low ethylene concentrations in the atmosphere surrounding the produce.
The prior art in scrubbing ethylene from produce storage rooms consists of potassium permanganate scrubbers in which the active ingredient potassium permanganate is absorbed on a silicate or activated alumina base and the potassium permanganate oxidises ethylene into harmless carbon dioxide and water. Another prior art ethylene scrubber uses a high temperature catalyst to catalytically oxidise ethylene into carbon dioxide and water.
Potassium permanganate scrubbers suffer from high operating costs, reduced ethylene scrubbing performance as the active ingredient is consumed and the fact that bacteria and fungi are not effectively controlled.
Catalytic oxidation scrubbers suffer from high capital and operating costs and the limitation of destroying only the bacteria and fungi passing through the scrubber rather than destroying bacteria.and fungi present on the surface of the produce and on surfaces within the storage room.
SHEET Most fruits, vegetables and cut flowers are attacked and destroyed by bacteria and fungi and many methods are used in the post harvest storage and transport of produce to reduce spoilage due to bacteria and fungi. The methods include a large number of chemical dips and sprays, the use of ozone as a powerful oxidising agent and the use of ultraviolet lights.
The object of this invention is to provide an ethylene scrubber that also effectively destroys bacteria and fungi in the atmosphere surrounding the produce and on the produce surfaces.
The invention comprises an apparatus that combines the effects of ultraviolet lights emitting radiation at desired wavelengths for ethylene destruction and an ozone destruction catalyst to control the ozone concentration in a produce storage room at a predetermined level.
The apparatus consists of an enclosure that contains a fan to circulate the atmosphere from a produce storage room past one or more ultraviolet lights. As the atmosphere passes- the lights, bacteria, fungi and ethylene are destroyed and ozone is produced. Excessive levels of ozone in the storage room can be harmful to some produce and a bed of catalyst is provided to reduce the ozone concentration to levels that destroy bacteria and fungi but do not damage the produce. By this means, the apparatus can maintain a desired level of ozone within the storage room atmosphere and this ozone can destroy bacteria and fungi on the produce surfaces on a continuous basis. The desired ozone level is in the range 0.1 to 10 vol ppm and varies with the type of produce and bacteria or fungi to be controlled.
For many fruits the ethylene concentration .in the surrounding atmosphere should be kept below 1 ppm to prolong storage life whereas ' for some fruits and most vegetables and cut flowers, the ethylene concentration
SUBSTITUTE SH£ET should be kept below 0.1 ppm. Our experiments show that the gas flow rate past the ultraviolet lights becomes a limiting factor at these low concentrations and the flow rate must be maintained above certain limits. To effectively control ethylene at 1 ppm, the gas flow should be greater than 20 m3/hr per ultraviolet light in the apparatus whilst ethylene control at 0.1 ppm requires the gas flow to be greater than 60 m3/hr per light.
Most ultraviolet lights that are manufactured are designed to emit most of their energy at the 254 nm wavelength. Experiments show that ultraviolet radiation at this wavelength is ineffective at destroying ethylene whereas ultraviolet radiation at 185 n is highly effective at destroying ethylene. Hence, specially designed and manufactured mercury vapour lights which emit much of their radiation at 185 nm with the remainder predominantly at 254 nm effectively destroy ethylene. The ultraviolet lights which emit strongly at 185 nm produce large amounts of ozone from oxygen in the circulated atmosphere. It is believed that photons of ultraviolet radiation, oxygen free radicals and ozone all contribute to the destruction of bacteria, fungi and ethylene as the atmosphere passes through the apparatus. Emission of 254 nm wavelength radiation is particularly effective at destroying bacteria.
Ozone is a highly reactive unstable gas. It will oxidise many things including bacteria, fungi, ethylene and complex odour molecules. Depending on conditions within a storage room such as temperature, humidity and room contamination, the half life of ozone in the storage room atmosphere will be between 5 and 30 minutes.
To ensure that the ozone level in the storage room is controlled at a predetermined level, the apparatus has a bed of catalyst that rapidly converts ozone into harmless oxygen.
The ozone concentration leaving the apparatus can be altered by varying the catalyst bed height. Many types of catalyst were tested in experiments by the Inventors. The best catalyst was found to be pellets of ferro manganese aluminium oxide with particle sizes in the range 1 to 10 mm mean diameter. The composition of the catalyst is as follows:
Figure imgf000006_0001
One embodiment of the apparatus is described in Figures 1, 2 and 3.
Atmosphere from the produce storage room enters the apparatus via the inlet nozzle (1 ) . The atmosphere may be air or may be air modified to controlled atmosphere storage conditions. The atmosphere flows through a channel (2) and past one or more ultraviolet lights (3). The ultraviolet lights are powered by transformer ballasts (4). The atmosphere then flows through another channel (5) and through a catalyst support grate (6). The channels and grate are sized to minimize the pressure drop of the flowing gas. The atmosphere then passes through the catalyst bed (7). The size of the catalyst pellets and the height of the catalyst bed are determined by the flow rate of atmosphere, the inlet concentration of ozone, the desired outlet concentration of ozone and the head characteristics' of the fan.
Catalyst pellets can be in the size range 1mm to 10mm mean diameter but more preferably in the range 5mm to 10mm mean diameter. A fan (8) is used *to circulate the atmosphere from the storage room through the apparatus. Atmosphere leaves the apparatus via the outlet nozzle (9). The inlet nozzle (1) and outlet nozzle (9) may be connected to piping to allow the apparatus to be located outside of and remote from the storage room. A lid (10) is bolted to the main body (11) of the apparatus and can be removed for access to components and catalyst. A gasket seal (12) is provided between the lid and the main body to ozone and ethylene bypass within the apparatus. An electric control box (13) is provided to operate the apparatus.
A pressure switch (14) is provided which turns the ultraviolet lights off if flow through the apparatus falls below predetermined value. This is a safety measure to prevent excessive ozone from entering the storage room should the fan fail. An access panel (15) is provided to install the ultraviolet lights.
The design of the apparatus provides automatic weatherproofing of the fan, lights and ballasts. The use of granular catalyst of the type disclosed permits a compact design. Because the fan is inside the apparatus and gasket seals are used, the apparatus is suitable for use in controlled atmosphere stores where leaks must be minimized.

Claims

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:
1. An apparatus for destroying bacteria, fungi, odours and ethylene from a gas stream comprising a body (11), a lid (10), a fan (8) to circulate the gas, an assembly of 1 or more ultraviolet lights (3) that emit much of their radiation at 185 nm wavelength and catalyst (7) to control ozone in a produce storage room.
2. An apparatus as claimed in Claim 1 in which the catalyst has the composition and particle sizes as detailed in this patent specification.
3. An apparatus as claimed in Claims 1 and 2 in which the fan has been sized to give a minimum gas flow of 20m3/hr per light when controlling ethylene at 1 ppm and a minimum gas flow of 60 m3/hr per light when controlling ethylene at 0.1 ppm.
"
PCT/AU1989/000389 1988-09-13 1989-09-13 Gas scrubber for produce storage WO1990002572A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPJ040788 1988-09-13
AUPJ0407 1988-09-13

Publications (1)

Publication Number Publication Date
WO1990002572A1 true WO1990002572A1 (en) 1990-03-22

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Country Status (1)

Country Link
WO (1) WO1990002572A1 (en)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2666742A1 (en) * 1990-09-17 1992-03-20 Decupper Jean Device for equipping cold rooms used for the storage of food products
WO1993010664A1 (en) * 1990-10-01 1993-06-10 Clover Eletrônica Ltda. Process, installation and chamber for reducing biological activity in an enclosure, particularly for a storage space
EP0560690A1 (en) * 1992-03-13 1993-09-15 Jean Decupper Device for cold rooms used for storage of foodstuff
DE4426648A1 (en) * 1994-07-16 1996-01-18 Bundschuh Gerhard Dr Treatment of food prods. by fumigating with ozone-contg. gas
US6503547B1 (en) * 1999-11-18 2003-01-07 Grupo Interozone Method for diffusing ozone in a closed environment
EP1483972A1 (en) * 2003-06-02 2004-12-08 Université Catholique de Louvain Method and apparatus for preserving agricultural products
WO2005013729A1 (en) * 2003-07-19 2005-02-17 Biofresh Ltd Apparatus and method for the ozone preservation of crops
WO2008127315A2 (en) * 2006-11-21 2008-10-23 Primaira, Llc Apparatus and method for treating impurities in air and materials
EP2488223A2 (en) * 2009-10-14 2012-08-22 Primaira, LLC Apparatus and method for treating impurities in air and materials
US8388900B2 (en) 2007-11-21 2013-03-05 Primaira, Llc Apparatus and method for treating impurities in air and materials
WO2013119815A1 (en) * 2012-02-07 2013-08-15 Arrigo Vincent M Counter-top produce refrigeration and ozonation system and method
CN103536939A (en) * 2013-10-28 2014-01-29 厦门环宇卫生处理有限公司 Intelligent multifunctional disinfection box
US8936563B2 (en) 2008-03-28 2015-01-20 Vitalmex International S.A. de C.V. Method for connecting a blood pump without trapping air bubbles
US9480267B2 (en) 2011-01-25 2016-11-01 Vincent Arrigo Refrigerator crisper and ozonation system and method
US10201809B2 (en) 2013-07-05 2019-02-12 Nitto Denko Corporation Photocatalyst sheet
US10391482B2 (en) 2013-07-05 2019-08-27 Nitto Denko Corporation Transparent photocatalyst coating and methods of manufacturing the same
US10549268B2 (en) 2013-07-05 2020-02-04 Nitto Denko Corporation Filter element for decomposing contaminants, system for decomposing contaminants and method using the system
US10702623B2 (en) 2006-11-21 2020-07-07 Bluezone Ip Holding Llc Apparatus and method for treating impurities in air and materials
US10898604B2 (en) 2017-03-16 2021-01-26 Bluezone Ip Holding Llc Air treatment system
US10933159B2 (en) 2017-03-16 2021-03-02 Bluezone Ip Holding Llc Air treatment method
US10933158B2 (en) 2017-03-16 2021-03-02 Bluezone Ip Holding Llc Air treatment system and method of use

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56144725A (en) * 1980-04-11 1981-11-11 Mitsubishi Electric Corp Method for scrubbing and deodorizing malodorant gas
JPS57177324A (en) * 1981-04-24 1982-11-01 Mitsubishi Electric Corp Air purifier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56144725A (en) * 1980-04-11 1981-11-11 Mitsubishi Electric Corp Method for scrubbing and deodorizing malodorant gas
JPS57177324A (en) * 1981-04-24 1982-11-01 Mitsubishi Electric Corp Air purifier

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, C-147, page 161; & JP,A,57 177 324 (MITSUBISHI DENKI K.K.), 1 November 1982. *
PATENT ABSTRACTS OF JAPAN, C-91, page 13; & JP,A,56 144 725 (MITSUBISHI DENKI K.K.), 11 November 1981. *

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2666742A1 (en) * 1990-09-17 1992-03-20 Decupper Jean Device for equipping cold rooms used for the storage of food products
WO1993010664A1 (en) * 1990-10-01 1993-06-10 Clover Eletrônica Ltda. Process, installation and chamber for reducing biological activity in an enclosure, particularly for a storage space
US5326543A (en) * 1990-10-01 1994-07-05 Clover Electronica Ltda. Process, installation and chamber for reducing biological activity in an enclosure, particularly for a storage space
EP0560690A1 (en) * 1992-03-13 1993-09-15 Jean Decupper Device for cold rooms used for storage of foodstuff
FR2693259A1 (en) * 1992-03-13 1994-01-07 Decupper Jean Device for equipping cold rooms used for the storage of food products.
DE4426648A1 (en) * 1994-07-16 1996-01-18 Bundschuh Gerhard Dr Treatment of food prods. by fumigating with ozone-contg. gas
US6503547B1 (en) * 1999-11-18 2003-01-07 Grupo Interozone Method for diffusing ozone in a closed environment
EP1483972A1 (en) * 2003-06-02 2004-12-08 Université Catholique de Louvain Method and apparatus for preserving agricultural products
WO2004105497A1 (en) * 2003-06-02 2004-12-09 Certech Asbl Method and device for preserving agricultural products
WO2005013729A1 (en) * 2003-07-19 2005-02-17 Biofresh Ltd Apparatus and method for the ozone preservation of crops
WO2008127315A2 (en) * 2006-11-21 2008-10-23 Primaira, Llc Apparatus and method for treating impurities in air and materials
WO2008127315A3 (en) * 2006-11-21 2009-01-15 Primaira Llc Apparatus and method for treating impurities in air and materials
US8114358B2 (en) 2006-11-21 2012-02-14 Primaira, Llc Apparatus and method for treating impurities in air and materials
US10702623B2 (en) 2006-11-21 2020-07-07 Bluezone Ip Holding Llc Apparatus and method for treating impurities in air and materials
US8388900B2 (en) 2007-11-21 2013-03-05 Primaira, Llc Apparatus and method for treating impurities in air and materials
US8936563B2 (en) 2008-03-28 2015-01-20 Vitalmex International S.A. de C.V. Method for connecting a blood pump without trapping air bubbles
US9220849B2 (en) 2008-03-28 2015-12-29 Vitalmex Internacional S.A. De C.V. Device and method for connecting a blood pump without trapping air bubbles
EP2488223A2 (en) * 2009-10-14 2012-08-22 Primaira, LLC Apparatus and method for treating impurities in air and materials
EP2488223A4 (en) * 2009-10-14 2014-06-25 Primaira Llc Apparatus and method for treating impurities in air and materials
US9480267B2 (en) 2011-01-25 2016-11-01 Vincent Arrigo Refrigerator crisper and ozonation system and method
WO2013119815A1 (en) * 2012-02-07 2013-08-15 Arrigo Vincent M Counter-top produce refrigeration and ozonation system and method
CN104285112A (en) * 2012-02-07 2015-01-14 文森特·M·阿里戈 Countertop product refrigeration and ozonation system and method
US10391482B2 (en) 2013-07-05 2019-08-27 Nitto Denko Corporation Transparent photocatalyst coating and methods of manufacturing the same
US10201809B2 (en) 2013-07-05 2019-02-12 Nitto Denko Corporation Photocatalyst sheet
US10549268B2 (en) 2013-07-05 2020-02-04 Nitto Denko Corporation Filter element for decomposing contaminants, system for decomposing contaminants and method using the system
US10710063B2 (en) 2013-07-05 2020-07-14 Nitto Denko Corporation Transparent photocatalyst coating and methods of manufacturing the same
CN103536939A (en) * 2013-10-28 2014-01-29 厦门环宇卫生处理有限公司 Intelligent multifunctional disinfection box
US10898604B2 (en) 2017-03-16 2021-01-26 Bluezone Ip Holding Llc Air treatment system
US10933159B2 (en) 2017-03-16 2021-03-02 Bluezone Ip Holding Llc Air treatment method
US10933158B2 (en) 2017-03-16 2021-03-02 Bluezone Ip Holding Llc Air treatment system and method of use
US11730849B2 (en) 2017-03-16 2023-08-22 Bluezone Ip Holding Llc Air treatment method

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