DE102004015381B4 - Disinfection of Nutzgas-Leitungssytemen - Google Patents

Abstract

Apparatus for contacting or displacing a liquid food with a useful gas, comprising:
- A container (7) for receiving the liquid food
- A common source (1, 3) for a Nutzgas and a disinfecting gas
- A line system (5) for the useful gas, which connects the Nutzgas- and disinfecting gas source (1, 3) with the container (7) for contacting or displacing the liquid food after introduction into the container with the Nutzgas and the disinfecting gas,
wherein the useful gas is selected from the group consisting of CO ₂ , O ₂ , N ₂ and mixtures thereof
and the disinfecting gas is selected from the group consisting of chlorine dioxide, chlorine and mixtures thereof.

Description

The The invention relates to a device for contacting or displacing a liquid Food with a Nutzgas, comprising a container for Intake of the liquid Food, a source for a Nutzgas, a line system for the Nutzgas; which the Nutzgasquelle so with the container that connects the liquid Food after being introduced into the container there contacted with the useful gas or is or can be offset. The invention further relates a method for disinfecting a Nutzgas-line system of a Apparatus for contacting or displacing a liquid food with a useful gas.

at the preparation, production or supply of liquid food, especially drinks, These are often with Nutzgasen such. As carbon dioxide, nitrogen or oxygen is applied. These Nutzgase find for example as propellant or Zapfgase z. For example the promotion alcoholic and non-alcoholic beverages from containers such as barrels or Keg use or are to supply appropriate facilities from a central pressure vessel via pressure piping systems to disposal posed. Carbon dioxide and oxygen are also used to manufacture of carbonated or enriched with oxygenated beverages. It will be the liquid ones Food though often mixed with microorganisms, eg. B. hygienic due to the use improper starting materials, such as contaminated gases, or through contaminated gas supply lines or gas storage tanks. This can cause health problems consumers or spoil liquid foods.

The Contamination of natural gas piping systems in devices of The type mentioned above is often based also on ascending germs coming from other areas of the device such as a sampling device into the system and penetrate spread in this. Even check valves or filter devices offer experience, no reliable Protection against contamination with microorganisms, so that in Many devices regularly disinfect required are.

It are cases become known in which in Nutzgas piping systems extremely dangerous Microorganisms such. B. Legionella could spread to the Lead legionellosis can, a disease often fatal Output. This also applies to systems in which carbon dioxide is used becomes. Although carbon dioxide has a certain disinfecting effect across from z. B. Aerobics. On the other hand, carbon dioxide is a carbon source for anaerobic, Algae and other microorganisms available, their unwanted proliferation promote can.

The in gas-carrying Conduits often forming condensed water can also an ideal propagation room for Represent microorganisms.

This Problem is especially known from hospitals that have central Gas production facilities feature, in which pathogenic germs over distribute large areas of the hospital and in different Departments can infect patients. The can Microorganisms u. a. through a so-called retrograde contamination from the point of the withdrawal fitting "backwards" into the pipe system grow.

Oxygen, Nitrogen and carbon dioxide have only a weak disinfecting Effect, in the case of oxygen at its low redox potential rests while the effect of nitrogen and carbon dioxide is due to that for Aerobes necessary oxygen for displaces cellular respiration and, in the case of carbon dioxide, it also causes a reduction the pH in aqueous Media is coming. An effective disinfection, however, is through this very weak disinfectant not expected. Oxygen, Nitrogen, carbon dioxide and other gases with no more disinfecting Effect are therefore not "disinfecting gases" in the sense of the present Text. See the definition below.

Thus, there is basically the problem that gas line systems can be contaminated with microorganisms and therefore - especially if the gas from these piping systems comes into contact with food or drink - a disinfection would be necessary or at least desirable. Nevertheless, disinfection is often dispensed with altogether - as is the case, for example, with carbon dioxide cartridges used for carbonating tap water in domestic use, or even with the carbonator itself and the associated PET bottles. In more complex systems is often the introduction of the known liquid disinfectants such. As hydrogen peroxide problematic, because these liquids can only be removed from the gas-conducting systems insufficient and there lead to contamination of the gases or to increased corrosion. Furthermore, z. B. hydrogen peroxide according to current Drinking water ordinance are completely flushed out and must therefore not be left behind in the drinking water. This rinsing is extremely expensive: large amounts of water are needed and the time required for rinsing is high. The same applies to other liquid disinfectants.

The DE 37 34 025 A1 and the DE 199 48 681 A1 each reveal the preservation of food.

The DE 698 18 441 T2 describes a release system for ClO ₂ gas.

in the Area of beverage production be disinfection measures today often using 120 ° C hot Steam is carried out in an autoclave. Accordingly, for example for the Disinfection of containers for beer (especially for those with integrated Nutzgasreservoir) not only a considerable operational effort necessary to autoclave the above Water vapor temperature of over 100 ° C too reach, but also a considerable expenditure of energy and time, because the whole system brought up to the appropriate temperatures, on this for held a not insignificant period and then again one cooling process must be subjected.

moreover owns this procedure - like Also other disposable disinfection without subsequent Rinse - the significant Disadvantage that, although the microorganisms killed (or significantly reduced) but their organic matter as a biofilm in the apparatus remains and thus provides an ideal breeding ground for recontamination. But also in cases in which a disinfection measure with subsequent rinsing carried out virtually no disinfectant remains in the disinfected system, so later (New) Contaminations or residual contamination caused by the disinfection measures no or only insufficiently recorded, no growth inhibition is opposed.

The described contaminations are particularly for systems for the treatment of liquid Food problematic with a useful gas, especially then when these systems are used repeatedly or over a longer period of time become. Object of the present invention was therefore an apparatus of the type mentioned above, the treatment, d. H. To contact or putting liquid Food with a useful gas allows, with the Nutzgas line system be subjected to disinfection in a technically simple manner can, which reduces the above-described disinfection problems or dissolves.

These Task is solved by a device as described in claim 1.

there Under a food is a substance to be understood, for consumption is determined by human or animal (food or stimulant), a liquid Food is one such, at the time of contacting or displacing with a useful gas due to its liquid content liquid is, such. As cream, drinking water or other drinks. There the predominant Number of measures for contacting or adding liquid food with a Nutzgas drinks Unless otherwise indicated, the term "drink" will be used in the following text instead of the term "liquid food".

One In the context of the present text, useful gas is a gas which has to be added is intended to have a physical or chemical effect on a drink exercise. Preferred functions of the Nutzgases are the use as a propellant, the use for carbonation (carbonated drinks) or for oxygenation (oxygenated drinks) or a combination from these functions.

One Disinfection gas is a gas in the context of the present text, that is capable of producing a biocidal or biostatic effect Exercise microorganisms, the stronger is as the corresponding effects of carbon dioxide, nitrogen or oxygen. Preferred disinfecting gases are chlorine dioxide, Chlorine and ozone.

sources for use and disinfecting gas can in principle all known from the prior art gas sources such. B. Gas storage tank (z. As gas cylinders or cartridges) or gas-forming chemical reactions be.

Due to the presence of a Nutzgasquelle it is possible to control the disinfecting effect as needed. Thus, accordingly already germinated objects such. As drinks, surfaces (eg of containers) and lines to be disinfected as needed. In particular, it is possible to disinfect the Nutzgase and the Nutzgasleitungssystem permanently, ie, for example, for 5, 10, 24 hours or 5, 10 or more than 14 days. The disinfecting effect does not diminish, as after a disposable disinfectant on, but is even flexible nachdosierbar, depending on the need and risk of contamination.

there must be the disinfectant gas and its concentration during treatment of drinks such as B. drinking water in accordance with statutory regulations for additives for food or with the Drinking Water Ordinance and also with the provisions on maximum Workplace concentrations are. The skilled person is able considering the disinfectant gas used the appropriate regulations observed. It is also possible for him, by suitable choice of material make sure that the staggered with the disinfecting gas Nutzgase not to increased corrosion of the container or Conduct lead material and / or with each other in undesirable Way react. The same applies to the selection of the combination of useful and disinfecting gases. Can be used as disinfectant gases are in particular all gases that are approved for the food industry are and have a sufficient disinfecting effect. Prefers are oxidative disinfectant gases.

The Devices for contacting or displacing the liquid food can with the useful gas diverse On the one hand, it can be large-scale Installations for displacing, for example, mineral waters with carbon dioxide or oxygen, on the other hand, are also for home use provided carbonation systems such devices. And also Kegs ("pressurized Beverages- and basic container ", in particular small kegs) and barrels with an integrated, structurally separated gas tank are such devices, in which case, the line system for the useful gas on the short Connecting path between the Nutzgasquelle (the gas supply in upper part of the barrel or keg) and in the lower part of the barrel or keg arranged containers for receiving the beverage limited. Such compounds can z. B. valves.

Prefers is the liquid Food a drink. (Here is explicitly between liquid Food and drink distinguished.)

Prefers is a device according to the invention, in which the Nutzgasquelle and the disinfection source are identical, So z. B. a single compressed gas cartridge. The advantage of such Device is that with a corresponding adjustment of the ratio between useful gas and disinfecting gas without further regulation ensures permanent disinfection is.

Prefers is also an inventive or a device according to the invention described as preferred in which the container for receiving the liquid Food a beverage barrel, a pressure vessel or a keg (without integrated Nutzgasquelle) is. Preferred pressure vessels are Bottles for Carbonators for Domestic use, particularly preferably made of PET or other plastics and / or glass.

Prefers is also a device according to the invention, one with the container connected outlet pipe for the liquid Foodstuffs, wherein (a) the line system for the useful gas, which connects the Nutzgasquelle with the container, and (b) the Outlet line are arranged so that an operating condition adjustable is one in the container introduced liquid Food under the pressure of the Nutzgases through the outlet pipe from the container is squeezed out.

Such Devices can z. B. dispensers for the gastronomy, big industrial Equipment for the treatment of beverages or keg with integrated Nutzgas- / disinfection gas tank.

• – Durchleiten einer Mischung des Nutzgases mit einem Desinfektionsgas durch das Nutzgas-Leitungssystem, wobei die Konzentration des Desinfektionsgases und die Strömungsgeschwindigkeit der Gasmischung so eingestellt ist, dass einzelne oder sämtliche im Nutzgas-Leitungssystem vorhandenen Keime abgetötet werden.

Preferably, with the device according to the invention can be carried out a method for disinfecting a Nutzgas-line system for contacting or placing a liquid food with a Nutzgas, with the following step:

• - Passing a mixture of the Nutzgas with a disinfecting gas through the Nutzgas line system, wherein the concentration of the disinfecting gas and the flow rate of the gas mixture is adjusted so that individual or all present in the Nutzgas line system germs are killed.

Of the Advantage of this method is based in particular on the long-lasting and constantly in operation renewed disinfection (see above for example periods). there is the expert capable - like also already noted above - the individual components of the system, ie in particular the materials, to vote on the used Nutzgase and disinfecting gases.

Preferred is a method, wherein the device comprises a container for holding the liquid food (such as a device according to the invention) and that ge by the Nutzgas line system led gas mixture is introduced into the container so that any or all existing bacteria in the container are killed.

Of the The advantage of such a method is that not only that Useful gas-line system disinfected, but also a reduction in microbial contamination in the container and in particular in the container possibly contained drinks is reached. It is preferred that a liquid food at least in part of the container located.

Prefers is also a method in which the device is connected to the container Outlet pipe for the liquid Food includes and (a) by the Nutzgas piping system and (b) into the container introduced gas mixture also (c) in or through the outlet is directed to single or all in the outlet line kill existing germs.

Of the Advantage of this method is that it is possible to the entire system with the disinfecting gas for a longer period z. B. for the above mentioned periods to disinfect. This is particularly possible or useful if the container no liquid Contains food.

• – das Desinfektionsgas ausgewählt ist aus der Gruppe bestehend aus: ClO₂, Cl₂, O₃ und deren Mischungen

und/oder

• – das Nutzgas ausgewählt ist aus der Gruppe bestehend aus: CO₂, O₂, N₂ und deren Mischungen.

In particular, a device according to the invention is preferred, wherein

• - The disinfecting gas is selected from the group consisting of: ClO ₂ , Cl ₂ , O ₃ and mixtures thereof

and or

• - The Nutzgas is selected from the group consisting of: CO ₂ , O ₂ , N ₂ and mixtures thereof.

Table 1 below shows useful combinations of disinfecting gas and working gas for various applications Table 1 Disinfection Gas / useful gas CO ₂ N ₂ O ₂ CO ₂ / N ₂ CO ₂ / O ₂ N ₂ / O ₂ CO ₂ / N ₂ / O ₂ ClO ₂ XXX XX XX XX XX XX XX Cl ₂ X X X X X X X O ₃ X X X X X X X ClO ₂ / Cl ₂ X X X X X X X ClO ₂ / O ₃ X X X X X X X Cl ₂ / O ₃ X X X X X X X ClO ₂ / Cl ₂ / O ₃ X X X X X X X

Where:
X = combination may be useful depending on the application
XX = preferred combination (multiple use)
XXX = particularly preferred combination

Preferred combinations are the combination of the disinfecting gas ClO ₂ with CO ₂ , O ₂ , N ₂ , or mixtures of CO ₂ and O ₂ , CO ₂ and N ₂ , O ₂ and N ₂ , or mixtures of CO ₂ , O ₂ and N ₂ as a useful gas. The person skilled in the art will adjust the ratio of the individual gases within the useful gas as well as of the individual gases within the disinfecting gas and also the ratio of useful gas to disinfectant gas depending on the application.

Particularly preferred is a device according to the invention, wherein the disinfecting gas is ClO ₂ and the useful gas CO ₂ .

Prefers is also a device according to the invention, wherein the Nutzgasquelle is a commercial gas cartridge.

• 1. Chlor kann in gasförmigen Zustand mit Kohlendioxid, Sauerstoff und Stickstoff bevorzugt in einem solchen Mengenverhältnis vermischt werden, dass die maximale Arbeitsplatzkonzentration (MAK-Wert) für Chlor von 0,5 ppm (ml/cbm) bei Einleiten des Kohlendioxids, Sauerstoffs oder Stickstoffs in den vorbestimmten Raum bzw. der Grenzwert gemäß Trinkwasserverordnung für Chlor von 0,3 mg/L nicht überschritten wird. Die so erhaltenen Gasmischungen können im Anschluss in Gasflaschen abgefüllt oder direkt in die Anwendung eingebracht werden.
• 2. Chlor kann aus einer sauren wässrigen Lösung, die Chlor in der Oxidationsstufe +1 und/oder 0 enthält, mit einem pH-Wert < 5 durch Durchleiten des Nutzgases, insbesondere von O₂, N₂, CO₂ oder deren Mischungen, in den Gasstrom gebracht werden. Die Konzentration des aufgenommenen Chlors im Nutzgasstrom lässt sich hierbei sehr genau über den pH-Wert aufgrund der Konzentrationsabhängigkeit des elementaren Chlors vom pH-Wert einstellen.
• 3. Die Konzentration des Chlors im Nutzgasstrom lässt sich dadurch einstellen, dass man Chlor durch eine Reaktion eines Chlorids mit einem starken Oxidationsmittel wie z.B. Kaliumperoxomonosulfat, Natriumperoxodisulfat u.a. herstellt und die Menge des sich entwickelnden Chlors pro Zeiteinheit über die Konzentration der Eduktkomponenten regelt.
• 4. Des Weiteren kann eine mit Carbonaten versetzte Lösung von Hypochlorit und/oder hypochloriger Säure auf einen pH < 5 (Chlorentwicklung) eingestellt werden, so dass sich gleichzeitig entwickelndes Kohlendioxid, welches nach Sättigung des Wassers aus dem System entweicht, die gewünschte Menge Chlor aufnehmen kann.
• 5. Chlordioxid kann in gasförmigen Zustand mit Kohlendioxid in einem solchen Mengenverhältnis vermischt werden, dass die Maximale Arbeitsplatzkonzentration (MAK-Wert) für Chlordioxid von 0,1 ppm (ml/cbm) bei Einleiten des Kohlendioxids in den vorbestimmten Raum bzw. der Grenzwert gemäß Trinkwasserverordnung für Chlordioxid von z.B. in Deutschland von 0,2 mg/L in Trinkwasser und auch Getränken, die aus Trinkwasser hergestellt werden, nicht überschritten wird. Das so entstehende Kohlendioxid-Chlordioxid-Gemisch kann in Gasflaschen abgefüllt oder direkt in die Anwendung eingebracht werden.
• 6. Kohlendioxid kann mit Chlordioxid beladen werden, indem durch eine sauer eingestellte Chloritlösung Kohlendioxid geleitet wird, welches das sich aus der Reaktion der sich im sauren bildenden instabilen schwachen chlorigen Säure gemäß 5 HClO₂ → 4 ClO₂ + HCl + 2 H₂O bildende Chlordioxid ausstrippt. Besonders vorteilhaft ist die Anwesenheit von Chloridionen, die die oben genannte Reaktion katalytisch beschleunigen. Das Einstellen des pH der Chloritlösung kann bereits durch fortwährendes Durchleiten von Kohlendioxid durch die chlorithaltige Lösung erfolgen. Die sich bei < pH 5,5 bildende chlorige Säure zerfällt dann gemäß obenstehender Gleichung. Das Gleichgewicht dieser Reaktion wird durch den fortwährenden Entzug des Chlordioxids aus dem System zur Seite des Chlordioxids verschoben. Kohlendioxid hat eine stabilisierende Wirkung auf Chlordioxid, so dass eine entsprechende Mischung besonders vorteilhaft auf übliche Gasflaschen gezogen werden kann, ohne nennenswerten Verlust ihrer Aktivität durch z.B. Disproportionierungsreaktionen.
• 7. Es kann auch feuchtes Kohlendioxid durch/über feste Salze der chlorigen Säure geführt werden, die auch zum Schutz gegen Verbackung der Schüttung durch Zumischen von Sand, Quarz, Glas oder aber auch mineralischen Trägermaterialien für Chlorite z.B. Sodalithen vorbehandelt sind, so dass das saure Gas Kohlendioxid die chlorige Säure freisetzt und sich Chlordioxid aufgrund des Zerfalls gemäß der unter 6. angegebenen Gleichung bilden kann.
• 8. Kohlendioxid (aber entsprechend auch Sauerstoff oder Stickstoff) kann durch eine chlordioxidhaltige, wässrige Lösung geleitet werden, so dass sich bei diesem Vorgang das Nutzgas durch Ausstrippen des gasförmigen Chlordioxids aus seiner Lösung mit diesem belädt.
• 9. Um Sauerstoff und Stickstoff mit Chlordioxid zu beladen ist es ferner möglich, diesen Gasen ein oxidativ wirkendes Gas zuzumischen, wie z.B. Chlor oder Ozon, und dieses Gasgemisch durch/über feste Salze der chlorigen Säue zu leiten. Auch hier kann zum Schutz gegen Verbackung der Schüttung das Zumischen von Sand, Quarz, Glas oder aber auch mineralischen Trägermaterialien für Chlorite z.B. Sodalithen vorteilhaft sein. Das im Gasgemisch vorhandene starke Oxidationsmittel ist dann in der Lage, durch Oxidation der Chlorite Chlordioxid freizusetzen, wobei es selbst vollständig durch Reaktion aus dem Gasgemisch entfernt wird.

Here are some examples of ways in which carbon dioxide, oxygen or nitrogen can be treated with oxidative disinfectant gases:

• 1. Chlorine may be mixed in a gaseous state with carbon dioxide, oxygen and nitrogen preferably in such a proportion that the maximum workplace concentration (MAK value) for chlorine of 0.5 ppm (ml / cbm) with the introduction of carbon dioxide, oxygen or nitrogen in the predetermined space or the limit value according to the Drinking Water Ordinance for chlorine of 0.3 mg / L is not exceeded. The gas mixtures obtained in this way can subsequently be filled into gas cylinders or introduced directly into the application.
• 2. Chlorine can from an acidic aqueous solution containing chlorine in the oxidation state +1 and / or 0, with a pH <5 by passing the Nutzgases, in particular O ₂ , N ₂ , CO ₂ or mixtures thereof, in the gas flow are brought. The concentration of the absorbed chlorine in the Nutzgasstrom can be set very precisely on the pH due to the concentration dependence of the elemental chlorine from the pH.
• 3. The concentration of the chlorine in the Nutzgasstrom can be adjusted by chlorine by a reaction of a chloride with a strong oxidizing agent such as potassium peroxomonosulfate, sodium peroxodisulfate, etc. and controls the amount of chlorine evolved per unit time on the concentration of the educt components.
• 4. Furthermore, a solution of hypochlorite and / or hypochlorous acid mixed with carbonates can be adjusted to a pH <5 (chlorine evolution), so that simultaneously developing carbon dioxide, which escapes from the system after saturation of the water, absorb the desired amount of chlorine can.
• 5. Chlorine dioxide may be mixed in a gaseous state with carbon dioxide in such proportions that the maximum workplace concentration (MAK value) for chlorine dioxide is 0.1 ppm (ml / cbm) when the carbon dioxide is introduced into the predetermined space or limit, respectively Drinking water ordinance for chlorine dioxide of eg 0.2 mg / L in Germany in drinking water and drinks, which are produced from drinking water, is not exceeded. The resulting carbon dioxide-chlorine dioxide mixture can be filled into gas cylinders or introduced directly into the application.
• 6. Carbon dioxide can be loaded with chlorine dioxide by passing carbon dioxide through an acidified chlorite solution, which is the result of the reaction of the acid forming unstable weak chlorous acid according to 5 HClO ₂ → 4 ClO ₂ + HCl + 2 H ₂ O forming chlorine dioxide ausstrippt. Particularly advantageous is the presence of chloride ions, which catalytically accelerate the above reaction. Adjusting the pH of the chlorite solution can already be done by continuously passing carbon dioxide through the solution containing chlorite. The chlorous acid formed at <pH 5.5 then decomposes according to the equation above. The balance of this reaction is shifted to the side of the chlorine dioxide by the continuous removal of the chlorine dioxide from the system. Carbon dioxide has a stabilizing effect on chlorine dioxide, so that a corresponding mixture can be drawn on conventional gas cylinders particularly advantageously, without appreciable loss of their activity by, for example, disproportionation reactions.
• 7. Moist carbon dioxide can also be passed through / over solid salts of the chlorous acid, which are also pretreated to protect against caking of the bed by admixing sand, quartz, glass or even mineral support materials for chlorites, eg sodalites, so that the acidic Gas carbon dioxide releases the chlorous acid and chlorine dioxide can form due to decomposition according to the equation given in 6..
• 8. Carbon dioxide (but also corresponding to oxygen or nitrogen) can be passed through a chloro-dioxide-containing, aqueous solution, so that in this process, the useful gas by stripping the gaseous chlorine dioxide from his solution loaded with this.
• 9. In order to charge oxygen and nitrogen with chlorine dioxide, it is also possible to mix these gases with an oxidative gas, such as chlorine or ozone, and to pass this gas mixture through / through solid salts of the chlorous acids. Again, to protect against caking of the bed, the admixture of sand, quartz, glass or even mineral support materials for chlorites such as sodalites may be advantageous. The strong oxidant present in the gas mixture is then able to liberate chlorine dioxide by oxidation of the chlorites, whereby it itself is completely removed by reaction from the gas mixture.

The gas mixtures produced in such or other ways (useful gas + disinfecting gas) can to the subsequent Storage in gas containers still be dried by passing them over / through suitable desiccants conducts such as conc. Sulfuric acid, Aluminosilicates (zeolites) or cold traps.

The gas containers / lines should be made of a chlorine-resistant material or with Be provided with internal coatings such as chlorine-resistant paints.

All explained (as well as those not explained) Method for loading the useful gases carbon dioxide, oxygen and Nitrogen can also be carried out in partial streams, i. that is part of the Treated useful gas in the said (or other) way and the treated partial flow with the main flow of the Nutzgas again together becomes.

following The invention is based on attached Drawings closer described, the preferred embodiments affect

It represent:

1 A schematic representation of a device according to the invention for contacting or displacing a beverage with a useful gas;

2 a particular embodiment of a device according to the invention.

In the 1 and 2 identical reference numerals are used for elements that substantially correspond to each other in their function.

In the 1 illustrated device comprises a source of a useful gas ( 1 ), a source of a disinfecting gas ( 3 ), a pipeline system ( 5 ) for the useful gas, a container ( 7 ) for a drink and (optionally) an outlet line connected to the container ( 9 ) for a drink. Furthermore, control devices can be provided which regulate the inflow velocity and / or quantity of the useful and disinfecting gas into the line system for the useful gas ( 5 ) regulate. The entire device can be designed so that it can be operated under overpressure. The device according to the invention is designed in such a way that, when used as intended, the disinfection gas is at the same time as the useful gas in the line system for the useful gas ( 5 ) is located.

2 schematically represents a barrel such. B. a beer keg or keg with an internal Nutzgasreservoir. In this Nutzgasreservoir ( 1 . 3 ), the useful gas and the disinfecting gas are contained as a mixture, so that the reservoir simultaneously forms a Nutzgasquelle and a disinfection gas source (hence the use of two reference numerals 1 and 3 ). The Nutzgasreservoir ( 1 . 3 ) is structurally of a container ( 7 ) for receiving the beverage separately, which may be filled with a drink. The connection between the Nutzgasreservoir ( 1 . 3 ) and the container ( 7 ) for receiving the beverage provides a piping system ( 5 ) For the useful gas, which may optionally consist of a single valve. As a rule, the Nutzgasreservoir ( 1 . 3 ) are under pressure, so that when opening the outlet ( 9 ) optionally in the container ( 7 ) existing beverage from the outlet pipe ( 9 ) is driven off, wherein a mixture of useful and disinfecting gas from the reservoir for Nutzgas ( 1 . 3 ) by the line system for the useful gas ( 5 ) passes into the container for receiving the beverage.

Claims (6)

Device for contacting or displacing a liquid food with a useful gas, comprising: - a container ( 7 ) for the consumption of the liquid food - a common source ( 1 . 3 ) for a useful gas and a disinfecting gas - a piping system ( 5 ) for the useful gas, which the Nutzgas- and disinfection gas source ( 1 . 3 ) with the container ( 7 ), for contacting or displacing the liquid food after introduction into the container with the useful gas and the disinfecting gas, wherein the Nutzgas is selected from the group consisting of CO ₂ , O ₂ , N ₂ and mixtures thereof and the disinfecting gas is selected from the Group consisting of chlorine dioxide, chlorine and mixtures thereof. Device according to claim 1, wherein the container ( 7 ) is a beverage keg, pressure vessel or keg. Apparatus according to claim 1 or claim 2, characterized in that a liquid food after introduction into the container ( 7 ) by one with the container ( 7 ) connected outlet line ( 9 ) Is herauspressbar by the Nutzgas / disinfection mixture. Device according to one of the preceding claims, wherein a liquid food in at least a part of the container ( 7 ) is located. Device according to one of the preceding claims, wherein the disinfecting gas is ClO ₂ and the useful gas is CO ₂ . Device according to one of the preceding claims, wherein the Nutzgas- and disinfection gas source a single compressed gas cartridge is.