WO1992002151A1 - Procede de traitement d'un materiau biodegradable - Google Patents

Procede de traitement d'un materiau biodegradable Download PDF

Info

Publication number
WO1992002151A1
WO1992002151A1 PCT/GB1991/001353 GB9101353W WO9202151A1 WO 1992002151 A1 WO1992002151 A1 WO 1992002151A1 GB 9101353 W GB9101353 W GB 9101353W WO 9202151 A1 WO9202151 A1 WO 9202151A1
Authority
WO
WIPO (PCT)
Prior art keywords
biodegradable material
oxygen
biodegradable
concentration
contacted
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.)
Ceased
Application number
PCT/GB1991/001353
Other languages
English (en)
Inventor
Richard Lawrence Sperring
Peter Jonathan Fryer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SOUS CHEF Ltd
Original Assignee
SOUS CHEF Ltd
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 SOUS CHEF Ltd filed Critical SOUS CHEF Ltd
Publication of WO1992002151A1 publication Critical patent/WO1992002151A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/20—Activated sludge processes using diffusers
    • C02F3/201—Perforated, resilient plastic diffusers, e.g. membranes, sheets, foils, tubes, hoses
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B2/00—Preservation of foods or foodstuffs, in general
    • A23B2/05—Preservation of foods or foodstuffs, in general by heating using irradiation or electric treatment
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B2/00—Preservation of foods or foodstuffs, in general
    • A23B2/10—Preservation of foods or foodstuffs, in general by treatment with pressure variation, shock, acceleration or shear stress
    • A23B2/103—Preservation of foods or foodstuffs, in general by treatment with pressure variation, shock, acceleration or shear stress using sub- or super-atmospheric pressures, or pressure variations transmitted by a liquid or gas
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B2/00—Preservation of foods or foodstuffs, in general
    • A23B2/40—Preservation of foods or foodstuffs, in general by heating loose unpacked materials
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B2/00—Preservation of foods or foodstuffs, in general
    • A23B2/40—Preservation of foods or foodstuffs, in general by heating loose unpacked materials
    • A23B2/405—Preservation of foods or foodstuffs, in general by heating loose unpacked materials in solid state
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B2/00—Preservation of foods or foodstuffs, in general
    • A23B2/40—Preservation of foods or foodstuffs, in general by heating loose unpacked materials
    • A23B2/42—Preservation of foods or foodstuffs, in general by heating loose unpacked materials while they are progressively transported through the apparatus
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B2/00—Preservation of foods or foodstuffs, in general
    • A23B2/70—Preservation of foods or foodstuffs, in general by treatment with chemicals
    • A23B2/704—Preservation of foods or foodstuffs, in general by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/06—Treatment of sludge; Devices therefor by oxidation
    • C02F11/08—Wet air oxidation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/26—Activated sludge processes using pure oxygen or oxygen-rich gas
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the present invention relates to a method of treating a biodegradable material.
  • the present invention relates to a method of treating a human, or animal foodstuff, which subsequently is to be packaged in a substantially sealed container.
  • the invention also relates to apparatus for carrying out such a method.
  • the ohmic heating process was developed for heat treating flowable or mobile foodstuffs, prior to their being packed, and involves pumping a continuous flow of foodstuff through a heating chamber, containing electrodes, and passing an alternating electric current through the foodstuff to raise its temperature sufficiently for sterilization to take place.
  • the food is held under a nitrogen blanket at approximately 4bar.
  • ohmic heating causes less degradation of the food than conventional thermal pasturising processes, it nevertheless will cause a certain amount of degradation.
  • a method of treating a biodegradable material, for subsequent packaging or storage comprising entraining an amount of oxygen in the material, which is sufficient to have an inhibitory effect on the growth of anaerobic microorganisms in, or on the material.
  • the present invention provides a method of treating a biodegradable material, for subsequent packaging or storage, comprising contacting the biodegradable material with gaseous oxygen.
  • the first and second aspects of the invention are combined.
  • biodegradable is used herein to define a material which can be degraded or decomposed by microorganisms such as anaerobic bacteria, or which can provide sustenance to harmful or pathogenic microorganisms, again including anaerobic bacteria.
  • biodegradable material treated thereby may be sufficiently sterile to be packaged immediately, for example in a substantially sealed container. In most circumstances, however, immediate packing will not be possible, but the material may be rendered sufficiently sterile for packing by a shorter than usual heat treatment, or one carried out at a lower than usual temperature. This feature is particularly advantageous where the biodegradable material is a foodstuff which, as suggested above, is highly susceptible to being degraded during heating.
  • the oxygen is caused to dissolve in a portion of the biodegradable material, at a concentration sufficient to have an inhibitory effect on the growth of anaerobic microorganisms in or on the material.
  • the biodegradable material is contacted with gaseous oxygen under a greater pressure than that at which it is to be subsequently packed or stored.
  • oxygen gas is contacted with the biodegradable material under conditions selected to cause the oxygen to dissolve, in at least a portion of the biodegradable material, at a concentration of 2-14 mg/1.
  • the conditions are selected to cause the oxygen to dissolve at a concentration of 2-9 mg/1 and, more preferably, at a concentration of about 7 mg/1.
  • the oxygen is brought into contact with the biodegradable material at a pressure of at least 1 bar, preferably between 1 and 6 bar and, more preferably, at a pressure of approximately 4 bar.
  • the gaseous oxygen is in a substantially pure state.
  • the temperature of the oxygen and biodegradable material are held at less than 150°C and preferably at less than or equal to 100°C. It is desirable that the oxygen should remain in contact with the biodegradable material for at least 1 or 2 minutes and the oxygen is most preferably bubbled into the biodegradable material via sparging means.
  • methods in accordance with the present invention include a subsequent step of heating the treated biodegradable material to a temperature of 100°C or over, preferably to about 150°C and, preferably, at a pressure. in excess of 1 bar.
  • the material is then packed in a substantially sealed container.
  • the preferred form of heat treatment is ohmic heating in which the biodegradable material is heated by the passage of an electric current. It is preferred that the biodegradable material is mobile in the sense that, when subjected to the operating conditions of the present invention, the substance is flowable and has liquid, slurry, or dough like physical properties and, for example, may comprise solid matter dispersed in a liquid or the like.
  • Biodegradable materials which are most suited to being treated by a method in accordance with the invention include foodstuffs, fermentation broths, pharmaceutical preparations and other aqueous solutions and suspensions.
  • the inventive method is most useful when the biodegradable material treated is a mobile foodstuff and the inhibited microorganisms are anaerobic bacteria or bacterial spores.
  • the inventive method comprises bubbling gaseous oxygen into a flow of biodegradable material, maintaining the resulting dispersion under conditions selected to cause the concentration of oxygen, in a portion of the biodegradable material, to reach a value sufficient to have an inhibitory effect on the growth of anaerobic microorganisms in, or on the material, and, preferably, thereafter removing excess undissolved oxygen.
  • the present invention provides apparatus for carrying out a method in accordance with the first or second aspect of the invention, comprising a treatment chamber for retaining oxygen in contact with the biodegradable material at an elevated pressure, pump means for causing mobile biodegradable material to flow through the treatment chamber and, means for bubbling gaseous oxygen into the biodegradable material, to be carried with the biodegradable material flowing through the chamber.
  • the present invention also extends to packaged foodstuff which has been treated in accordance with the inventive method and, to packaging methods which include the inventive method.
  • packaging methods include plastic wrapping and canning processes.
  • Figure 1 shows a schematic diagram of apparatus in accordance with the third aspect of the present invention, which is suitable for practicing a method in accordance with both the first and second aspects of the invention.
  • An upright circular cross section tubular column 1 is located in a food processing plant between an input conduit 2 and an outlet conduit 3.
  • the outlet conduit 3 extends from an upper portion 4 of the column 1, to a further apparatus, which is preferably an ohmic heating column, within the processing plant.
  • the input conduit 2 communicates between a lower portion 5 of the column 1 and a different piece of apparatus in the processing plant, for example a mixing apparatus or the like.
  • a pump means (not shown) is arranged in the input conduit 2, for forcing material along the input conduit 2, into and up the column 1.
  • the lower portion 5 of the column 1 includes a porous sleeve 6 which is located within a chamber 7.
  • the chamber 7 is defined by an outer sleeve 12, located around and radially outwardly from the sleeve 6 and in sealing engagement with the remainder of the column 1.
  • a disengaging chamber 8 is defined above the outlet conduit 3, substantially vertically above the upper end portion 4 of the column 1.
  • a third conduit 9, provided with pump means 10, extends between the disengaging chamber 8 and the inlet chamber 7.
  • the column 1 has a volume of 25 litres and the pump means is arranged to force foodstuff through the column 1 at about 750 litres per hour, so that the foodstuff and oxygen are together in the column 1 for about 2 minutes.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Zoology (AREA)
  • Food Science & Technology (AREA)
  • Wood Science & Technology (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
  • General Preparation And Processing Of Foods (AREA)

Abstract

Procédé de traitement d'un matériau biodégradable, dans le but de le conditionner ou de le stocker, qui comprend l'introduction d'une certaine quantité d'oxygène dans ledit matériau, suffisante pour créer un effet inhibiteur de croissance de micro-organismes anaérobies à l'intérieur ou sur ledit matériau. L'invention décrit également un dispositif servant à traiter un écoulement continu du matériau. Le dispositif comprend une colonne verticale (1), disposée pour transporter un écoulement de matériau biodégradable et pourvue d'une section poreuse (6) à travers laquelle on peut introduire de l'oxygène dans ledit écoulement de matériau, sous forme d'un flux composé de bulles fines. L'oxygène non dissous est recueilli à partir d'une chambre (8) située à l'extrémité supérieure de la colonne.
PCT/GB1991/001353 1990-08-08 1991-08-08 Procede de traitement d'un materiau biodegradable Ceased WO1992002151A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9017400.4 1990-08-08
GB9017400A GB9017400D0 (en) 1990-08-08 1990-08-08 Oxygenation of foods

Publications (1)

Publication Number Publication Date
WO1992002151A1 true WO1992002151A1 (fr) 1992-02-20

Family

ID=10680358

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1991/001353 Ceased WO1992002151A1 (fr) 1990-08-08 1991-08-08 Procede de traitement d'un materiau biodegradable

Country Status (3)

Country Link
AU (1) AU8336191A (fr)
GB (1) GB9017400D0 (fr)
WO (1) WO1992002151A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR366752A (fr) * 1906-06-01 1906-10-11 Edward Janitzky Procédé perfectionné pour la conservation des substances animales
FR509242A (fr) * 1920-01-29 1920-11-04 Philippe Malvezin Procédé de stérilisation des substances alimentaires solides ou liquides par l'oxygène ou l'ozone sous toutes leurs formes
FR812903A (fr) * 1936-08-17 1937-05-20 Metra Procédé pour stériliser ou conserver la fraicheur des produits alimentaires et comestibles
GB726953A (en) * 1952-09-30 1955-03-23 George Montague Jennings Improvements in or relating to a process for the preservation of liquid or semi-solid foodstuffs
DE3540033C1 (de) * 1985-11-12 1986-11-20 Ottmar 6967 Buchen Tallafus Verfahren zum Haltbarmachen von Speisefruechten und -pflanzen
WO1989002221A1 (fr) * 1987-09-21 1989-03-23 Michael Aloysius Tracey Lait gazeifie

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR366752A (fr) * 1906-06-01 1906-10-11 Edward Janitzky Procédé perfectionné pour la conservation des substances animales
FR509242A (fr) * 1920-01-29 1920-11-04 Philippe Malvezin Procédé de stérilisation des substances alimentaires solides ou liquides par l'oxygène ou l'ozone sous toutes leurs formes
FR812903A (fr) * 1936-08-17 1937-05-20 Metra Procédé pour stériliser ou conserver la fraicheur des produits alimentaires et comestibles
GB726953A (en) * 1952-09-30 1955-03-23 George Montague Jennings Improvements in or relating to a process for the preservation of liquid or semi-solid foodstuffs
DE3540033C1 (de) * 1985-11-12 1986-11-20 Ottmar 6967 Buchen Tallafus Verfahren zum Haltbarmachen von Speisefruechten und -pflanzen
WO1989002221A1 (fr) * 1987-09-21 1989-03-23 Michael Aloysius Tracey Lait gazeifie

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 4, no. 93 (C-17)(575) 5 July 1980 & JP,A,55 054 855 ( OKUMURA ) 22 April 1980 see abstract *
PATENT ABSTRACTS OF JAPAN vol. 5, no. 120 (C-65)(792) 4 August 1981 & JP,A,56 058 481 ( ISHIKAWA ) 21 May 1981 see abstract *

Also Published As

Publication number Publication date
AU8336191A (en) 1992-03-02
GB9017400D0 (en) 1990-09-19

Similar Documents

Publication Publication Date Title
EP2181612B1 (fr) Procede de traitement d'aliment et appareil de traitement d'aliment
Ballestra et al. Influence of pressurized carbon dioxide on the thermal inactivation of bacterial and fungal spores
WO2005000364B1 (fr) Procedes et dispositif de sterilisation utilisant un sterilisant supercritique au dioxyde de carbone
JPH07102119B2 (ja) 果汁の高圧処理方法
JPS6269969A (ja) 高圧殺菌方法
Kim Ozone as an antimicrobial agent in minimally processed foods
CZ373798A3 (cs) Způsob snižování životaschopnosti mikroorganismů
JPH0346102B2 (fr)
Spilimbergo et al. INACTIVATION OF MICROORGANISMS BY SUPERCRITICAL CO
US20040101438A1 (en) Method and apparatus for sterilizing food containers
JPH0657236B2 (ja) 高圧液体殺菌装置
EP0395010B1 (fr) Procédé et dispositif pour la désodorisation de liège
JPH02203982A (ja) 静菌化水の製造方法
JP2736605B2 (ja) 液状物の殺菌方法
US5352417A (en) Apparatus for deodorization of cork
WO1992002151A1 (fr) Procede de traitement d'un materiau biodegradable
CA2013622A1 (fr) Procede de desaeration pour la production de jus de fruits
CN1245663A (zh) 降低液体制品中微生物活力的连续方法与装置
Hata et al. Rate analysis of the sterilization of microbial cells in high pressure carbon dioxide
JP4256562B2 (ja) 殺菌方法及び装置
EP0231333A1 (fr) Systeme et dispositif de fermentation dans des conteneurs souples
JP2007509617A (ja) 胞子不活性化プロセス
JPH05328950A (ja) 低温高圧殺菌方法
JP3397148B2 (ja) 液状物質の連続処理方法、連続処理装置及びそれらにより処理された液状飲食物
JPH08168515A (ja) 高圧殺菌装置

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU CA JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LU NL SE

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA