EP0912263A1 - Procede de nettoyage en machine d'emballages reutilisables presentant des taches tenaces - Google Patents

Procede de nettoyage en machine d'emballages reutilisables presentant des taches tenaces

Info

Publication number
EP0912263A1
EP0912263A1 EP97930381A EP97930381A EP0912263A1 EP 0912263 A1 EP0912263 A1 EP 0912263A1 EP 97930381 A EP97930381 A EP 97930381A EP 97930381 A EP97930381 A EP 97930381A EP 0912263 A1 EP0912263 A1 EP 0912263A1
Authority
EP
European Patent Office
Prior art keywords
containers
cleaning
treated
agents
container
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
EP97930381A
Other languages
German (de)
English (en)
Inventor
Harald Kluschanzoff
Thomas Wershofen
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.)
Ecolab GmbH and Co oHG
Original Assignee
Henkel Ecolab GmbH and Co KG
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 Henkel Ecolab GmbH and Co KG filed Critical Henkel Ecolab GmbH and Co KG
Publication of EP0912263A1 publication Critical patent/EP0912263A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/08—Cleaning containers, e.g. tanks
    • B08B9/20—Cleaning containers, e.g. tanks by using apparatus into or on to which containers, e.g. bottles, jars, cans are brought

Definitions

  • the invention relates to a method for the mechanical cleaning of reusable containers soiled with stubborn, in particular particulate, impurities, which serve to hold food, the containers being treated in a cleaning system with cleaning agents known per se for the food industry.
  • the food containers intended for multiple use are cleaned mechanically in large systems after the return.
  • cleaning agents used there such as sodium hydroxide solution with the addition of surfactants
  • Such stubborn contaminations are not only typical soiling of the respective containers, but also difficult contaminations that have arisen from the customer storing the containers that are only partially emptied for too long and improperly and using the food containers for other purposes.
  • Examples of such stubborn contaminants are yeasts, molds, baked-on organic residues, glue residues from the labels, oils, fats, foreign tastes and smells, inorganic salts, dyes, etc.
  • the reusable bottles are cleaned in bottle cleaning systems with sodium hydroxide solution at a temperature of up to 85 ° C. with the addition of additives.
  • the reusable bottles contain a large number of microorganisms, especially in the warm season, when they are returned empty by the customer. come. Such bottles are often exposed to the favorable temperatures for the growth of the microorganisms for several days or even weeks. This gives yeasts the opportunity to reproduce and ferment the remains of the beverage, and molds form lawns in the bottle.
  • the bottles are treated with water (pre-cleaning) and subsequent cleaning in caustic baths with about 1, 5 to 3.0% and 50 to 85 ° C hot sodium hydroxide solution.
  • pre-cleaning water
  • caustic baths with about 1, 5 to 3.0% and 50 to 85 ° C hot sodium hydroxide solution.
  • this cleaning is not sufficient to completely remove the microorganisms and other stubborn dirt. Therefore, it is known to use the lye bath complexing agent, e.g. B. EDTA (ethylenediamine-tetraacetic acid) and / or NTA (nitrilotriacetate) to add, whereby a satisfactory removal of the microorganisms in the case of glass bottles is achieved.
  • B. EDTA ethylenediamine-tetraacetic acid
  • NTA nitrilotriacetate
  • the z. B. consist of PET (polyethylene terephthalate), the use of caustic baths to which complexing agents such as those already mentioned have not been successful. After cleaning, non-tolerable remains of mold and dead yeast cells remain on the surfaces of the plastic bottles. The remnants are noticeable, for example, by spot black spots.
  • the inventor has found that the problem of effectively removing the microorganisms from plastic bottles through the use of oxidizing agents that release active oxygen, e.g. B. perborates or hydrogen peroxide can be solved. It is expressly pointed out that the present invention does not relate to disinfection by killing the microorganisms, but rather to the mechanical detachment and removal of impurities adhering firmly to the surface of the surface, e.g. B. the black dot-like contamination occurring in practice, but also other stubborn soiling, is directed. It has been found that with the action of such oxidizing agents, a thorough and satisfactory detachment of the impurities, in particular the microorganisms, from the plastic surfaces is achieved after only a few minutes.
  • oxidizing agents in connection with the cleaning of reusable plastic containers for food is known from DE 43 22 328 A1.
  • the oxidizing agent is not used to clean the containers, but rather to treat the containers that have already been cleaned in order to eliminate migrated constituents, in particular aroma constituents. If, for example, another beverage is filled the next time a plastic bottle is filled, a change in taste can occur due to aroma components migrating into the plastic.
  • the proposal in the cited document when the contents of the container are changed, all cleaned containers are subjected to treatment with oxidizing agents.
  • the known method is therefore not a cleaning of the containers by removing stubborn impurities, but a post-treatment of containers that have already been cleaned.
  • the oxidizing agents that give off active oxygen are the cleaning liquids known per se, for. B. mixed by adding in the cleaning baths of bottle washing machines, further problems occur.
  • the oxidizing agents disintegrate very quickly in the mostly highly polluted cleaning baths, so that larger quantities of oxidizing agents have to be added continuously.
  • the consumption of oxidizing agent is so high that the process for removing the contaminants by means of oxidizing agents cannot be used for economic reasons.
  • a process variant in which one of the Solution containing oxidizing agent is introduced into or into the container through separate spray tubes, because the oxidizing agent is used only once, it is also uneconomical for only one container.
  • the invention is concerned not only with the special problem of achieving a satisfactory removal of microorganisms from the reusable containers used in the food industry in a thorough and at the same time economical manner, but also with the thorough and economical cleaning of such containers from stubborn contaminants which result from cannot be removed for technical or economic reasons in the usual mechanical and automatic cleaning in practice.
  • organic residues glue residues, oils, fats, flavor and odorants, inorganic salts, color, etc.
  • the invention is therefore based on the object in the above-mentioned method to achieve a thorough and satisfactory removal of the stubborn impurities from the reusable containers in a particularly economical and inexpensive and ecological manner, which is not eliminated economically by the usual mechanical cleaning of all containers can be.
  • This object is achieved in that the contaminated with the stubborn, in particular particulate, contaminants before and / or after cleaning with the known cleaning agents in the cleaning system by means of a sensor device, automatically discharged and then in at least one separate step only treat the discharged containers once or several times with at least one agent that is not used in the cleaning system (separate treatment) and that is suitable for removing the contaminants.
  • the invention firstly proposes a treatment separate from the known cleaning for removing these special impurities and secondly a Treatment is limited to containers that have previously been sorted out automatically. Therefore, on the one hand, the consumption of the special agent is reduced extremely compared to the use of these agents in the usual mechanical cleaning process, since some of these agents disintegrate in the presence of the highly loaded cleaning bath. On the other hand, those agents can be used in the method according to the invention which have no effect when added to the cleaning bath, for. B. acids in the case of the usual alkaline cleaning baths, and / or in the usual mechanical cleaning, for. B.
  • the treatment step which is separate from the actual cleaning process, also enables the multiple use of the special agents, be it in a discontinuous or continuous process, and the economical use of otherwise complex mechanical cleaning steps, since only the heavily contaminated containers have to be subjected to this separate treatment.
  • the removed containers are treated in a separate step with oxidizing agents and / or acids and, if appropriate, with the addition of further agents such as surfactants or complexing agents.
  • the containers are made of plastic and in particular are plastic bottles, which are cleaned in bottle cleaning systems, because these containers particularly stubbornly resist thorough and economical cleaning.
  • the invention is therefore proposed that containers are ejected, the stubborn impurities of which consist of microorganisms such as yeasts, molds and the like, and that the ejected containers are treated with at least one oxidizing agent which releases active oxygen.
  • the removed containers are additionally treated with inorganic and / or organic acids and / or surfactants and / or complexing agents.
  • EDTA, NTA, phosphates, gluconates, etc. are suitable as complexing agents.
  • cleaning agent in the present application means the cleaning agent concentrate and the term “cleaning liquid” means the ready-to-use, dilute solution of the cleaning agent concentrate in water.
  • the special agents according to the invention for the separate treatment of the removed containers, the following aspects were taken into account.
  • the agents used in the process and their decay products are readily soluble in water, odorless and tasteless and, moreover, do not pose any environmental pollution.
  • a discoloration of the plastic containers and / or an attack on the surface of the plastic material is avoided.
  • the plastic materials of the containers are only exposed to relatively low or only briefly higher temperatures, so that deformations do not occur.
  • the method according to the invention is suitable for cleaning glass or plastic containers for the absorption of beverages and / or milk products, the containers preferably made of polyethylene terephthalate (PET), polycarbonate (PC), polypropylene (PP), polyacrylonitrile (PAN), polyethylene naphthalate (PEN) or polyvinyl chloride (PVC).
  • PET polyethylene terephthalate
  • PC polycarbonate
  • PP polypropylene
  • PAN polyacrylonitrile
  • PEN polyethylene naphthalate
  • PVC polyvinyl chloride
  • the stubbornly soiled containers are only detected after cleaning in a cleaning system which works with cleaning agents known per se, and in the case of bottles it is also a bottle washing machine which is also known Treatment by.
  • a cleaning system which works with cleaning agents known per se, and in the case of bottles it is also a bottle washing machine which is also known Treatment by.
  • the solution which is preferably used repeatedly for separate treatment, is only slightly contaminated with organic residues.
  • Degradation curves can be used in the case of oxidizing agents to demonstrate that these, e.g. B. solutions containing perborate or peroxide have a very high stability, so that the required amounts of oxidizing agent are relatively small.
  • the separately treated containers are preferably returned to the entrance of the cleaning system.
  • This circulation system ensures that only both cleaned and stubborn soiling and, in particular, microbiologically perfect containers occur at the outlet of the cleaning system.
  • the containers still containing residues go through the treatment step with the oxidizing agent several times.
  • the stubbornly soiled containers are detected in the cleaning system before cleaning, these containers are discharged, the separate treatment is carried out and only then are they passed to the entrance to the cleaning system.
  • the discharged containers are sent directly to the filling and labeling after the separate treatment and, if appropriate, a subsequent rinsing step.
  • the sensor device used in the method according to the invention for detecting the stubbornly soiled and in particular infested with microorganisms can be designed differently. So you can detect these containers with an optical and / or chemical detector. In the first case, a so-called “bottle inspector” works with a screening method. In the second case, the smell is detected using a so-called “sniffer”.
  • These sensor devices are known per se and are therefore not intended are described in more detail. However, other sensor devices can also be suitable for use in the method according to the invention.
  • the agent used in the separate treatment be injected into and / or onto the container and / or that the treatment be carried out in a bath.
  • the spraying process achieves an optimal combination of chemical and mechanical effects.
  • the stubbornly soiled containers are preferably treated with an aqueous solution.
  • the agent used for the separate treatment can advantageously also include surfactants, e.g. B. contain anionic, cationic and / or nonionic surfactants, sugar surfactants, and polyacrylates, phosphates and phosphonates, which facilitate or improve the detachment of stubborn contaminants and in particular the microorganisms from the container surfaces.
  • the additional ingredients can be contained separately or in combination in the liquid phase. In particular, they improve the action of the oxidizing agent to detach the microorganisms from the plastic surfaces.
  • the method according to the invention for separate treatment of the containers can be carried out in a wide temperature range.
  • the general rule here is that, as the temperature rises, better effects can be achieved with regard to the removal of the stubborn impurities from the containers, in particular from the inside of bottles.
  • the higher temperatures in the temperature range specified below can be used.
  • a separate treatment of the containers with oxidizing agents is preferred at temperatures from 0 to 90 ° C., preferably in the range from 20 ° C. to below the softening temperature of the respective plastic material.
  • the upper limit of the temperature range for PET material is below 60 ° C and for PC material up to 80 ° C.
  • the agent for the separate treatment in particular the oxidizing agent, is allowed to act on the container for a period of from 0.5 to 10 min and preferably from 1 to 8 min. These times apply both when the liquid phase is applied in a bath and when the liquid phase is applied by spraying.
  • the oxidizing agents are selected from organic peracids, alkaline hypochlorites, hydrogen peroxide, alkaline perborates and alkaline percarbonates.
  • Perborates e.g. B. sodium perborate are particularly preferred.
  • organic peracids in aqueous solution are used as oxidizing agents, the peracid content of the aqueous solution being 0.001 to 40% by weight, preferably 0.01 to 5% by weight, in particular 0.05 to 2 wt .-% is.
  • the agent for separate treatment can be added to an aqueous treatment solution in the form of an aqueous or powdery concentrate.
  • FIG. 1 shows a schematic flow diagram of a first continuously working exemplary embodiment according to the invention, the containers being discharged before passing through the cleaning system,
  • FIG. 2 shows a flow diagram corresponding to FIG. 1 of a second exemplary embodiment according to the invention, the containers being discharged only after passing through the cleaning system,
  • FIG. 3 shows a flow diagram of a third exemplary embodiment of the invention
  • FIG. 4 shows a flow diagram of a fourth exemplary embodiment of the invention
  • Figure 5 is a flow diagram of a fifth embodiment of the invention corresponding to Figure 2, but the method is carried out discontinuously, and
  • FIG. 6 shows a flow diagram of a fourth exemplary embodiment according to the invention corresponding to FIG. 5, the containers being discharged before they pass through the cleaning system.
  • the reusable plastic bottles to be cleaned are checked with a sniffer 1 to determine whether there are any contaminants in the bottles that are noticeable due to an odor.
  • a sniffer an optically working inspector could also be used that can spot black spots.
  • the sensor device is set in such a way that a certain proportion of the bottles are separated out and fed to a separate treatment 3 with a special agent via an auxiliary conveyor belt 2.
  • the “problem bottles” are returned to the entrance of the sniffer 1 or, alternatively, are led directly to the bottle cleaning system according to the dashed line in FIG. 1. If a sufficient removal of the impurities has been achieved in the first case, the bottles, together with the unproblematic container, reach the bottle cleaning system 4 and are then guided to the packer via a bottle inspector 5 known per se.
  • the separate treatment 3 can be designed as a small cleaning machine, but also as a simple immersion bath or a device with a spray system, possibly together with an immersion bath.
  • FIG. 2 A similar procedure is used in the particularly preferred method according to FIG. 2, which is particularly suitable for removing particulate contaminants.
  • a separate treatment 3 which, on the one hand, have already been cleaned in the bottle cleaning system 4 and, on the other hand, nevertheless contain a certain amount of stubborn impurities.
  • the bath used in the separate treatment 3 is only minimally loaded with organic residual components, so that the stability of the special agent also repeated use is not affected. Therefore, this method works particularly economically with regard to the consumption of the required special agent, for. B. the oxidizing agent.
  • An advantage of the sensor device 5 arranged behind the cleaning system 4 is that labels or the like sticking to the containers cannot interfere, since they have already been removed in the cleaning system 4.
  • the sensor device is implemented as a bottle inspector 5, which detects particulate contaminants.
  • the bottles contaminated with stubborn impurities are detected by a sniffer 1, similar to the process according to FIG. 1, passed to a separate treatment 3 via a secondary conveyor belt 2 and finally - in contrast to the process according to FIG. 1 - directly led to the entrance of the bottle inspector 5, which is connected behind the bottle cleaning system 4.
  • the method variants according to the invention according to FIGS. 5 and 6 work discontinuously.
  • the highly contaminated bottles are recognized by the bottle inspector 5 or sniffer 1, discharged and, from time to time, subjected to a separate, discontinuous treatment.
  • the method according to FIG. 5 is particularly well suited to removing particulate contaminants.
  • the sorted bottles are guided to a packer 6 via a secondary conveyor belt 2.
  • the contaminated bottles are collected.
  • the collected, stubbornly contaminated bottles and only these are passed through the bottle cleaning system 4 at regular intervals, the separate treatment being carried out.
  • the special means e.g. B. oxidizing agents and / or acids of the treatment liquid in the bottle cleaning system 4 added.
  • the treatment liquid is preferably freshly prepared in order to ensure the stability - in particular in the case of the oxidizing agent - with certainty over the entire treatment period.
  • the method according to FIG. 6 is carried out in a manner corresponding to the method according to FIG. 5.
  • This method is preferably used to remove odoriferous substances from the containers.

Abstract

Selon l'invention, on détecte des emballages présentant des taches tenaces avant ou après le nettoyage dans une installation de nettoyage (4), le nettoyage étant effectué au moyen d'agents de nettoyage connus en soi, au moyen d'un dispositif de détection (1, 5), et lesdits emballages sont automatiquement extraits. Ensuite, seuls les emballages extraits sont traités une ou plusieurs fois, en au moins une étape séparée, avec au moins un agent non utilisé dans l'installation de nettoyage (4) (traitement spécial (3)), qui est approprié pour l'élimination des salissures. Le procédé présenté est particulièrement économique du fait que seul les emballages fortement salis doivent être soumis au traitement spécial (3).
EP97930381A 1996-07-01 1997-06-23 Procede de nettoyage en machine d'emballages reutilisables presentant des taches tenaces Ceased EP0912263A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19626137 1996-07-01
DE1996126137 DE19626137A1 (de) 1996-07-01 1996-07-01 Verfahren zum maschinellen Reinigen von mit hartnäckigen Verunreinigungen verschmutzten Mehrweg-Gebinden
PCT/EP1997/003278 WO1998000245A1 (fr) 1996-07-01 1997-06-23 Procede de nettoyage en machine d'emballages reutilisables presentant des taches tenaces

Publications (1)

Publication Number Publication Date
EP0912263A1 true EP0912263A1 (fr) 1999-05-06

Family

ID=7798397

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97930381A Ceased EP0912263A1 (fr) 1996-07-01 1997-06-23 Procede de nettoyage en machine d'emballages reutilisables presentant des taches tenaces

Country Status (5)

Country Link
EP (1) EP0912263A1 (fr)
AU (1) AU714410B2 (fr)
DE (1) DE19626137A1 (fr)
NO (1) NO986197D0 (fr)
WO (1) WO1998000245A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE19827739C2 (de) * 1998-06-22 2003-09-18 Ludwig Bohrer Anlage zum Reinigen von Flaschenkästen
DE10141239C2 (de) * 2001-08-23 2003-12-18 Korn Gmbh Verwendung flüssiger, wasserverdünnbarer Pre-Rinsing Zusammensetzungen und Verfahren zum Aufbringen derselben
DE102006049937A1 (de) * 2006-10-19 2008-04-30 Quinting, René Verfahren zum Reinigen von wiederverwendbaren transportablen Behältern
EP1935972A1 (fr) * 2006-12-21 2008-06-25 JohnsonDiversey, Inc. Procédé de lavage d'un élément polycarbonate
EP2091997B1 (fr) * 2006-12-21 2016-08-17 Diversey, Inc. Procédé de lavage d'un article en polycarbonate
DE102009003847A1 (de) 2009-04-29 2010-11-04 Krones Ag Vorrichtung und Verfahren zum Ausleiten von Objekten von einer sich bewegenden Transporteinrichtung
DE102009039762A1 (de) * 2009-09-02 2011-03-03 Krones Ag Verfahren zum Reinigen von Behältern und Reinigungsmaschine
IT1396699B1 (it) * 2009-11-19 2012-12-14 Unitec Spa Impianto perfezionato per la pulizia di contenitori per prodotti vegetali.
DE102010031564A1 (de) 2010-07-20 2012-01-26 Krones Aktiengesellschaft Intelligente Steuerung einer Flaschenwaschmaschine
DE102012200612A1 (de) * 2011-09-20 2013-03-21 Dürr Ecoclean GmbH Reinigungsanlage für Werkstücke mit automatischer Prozessparameter-Einstellung
DE102012214582A1 (de) * 2012-08-16 2014-02-20 Adelholzener Alpenquellen Gmbh Detektion von Flaschen mit Fehlgeschmack
DE102013011193B3 (de) * 2013-07-04 2013-12-05 Walter Mick Verfahren zum Reinigen und/oder Desinfizieren von Gefäßen, Flaschen, Kanistern und ähnlichen Behältern und deren Verschlüssen; abgefülltes flüssiges alkoholhaltiges Füllgut und Herstellverfahren hierfür

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US4830192A (en) * 1986-08-04 1989-05-16 The Coca-Cola Company Methods of discriminating between contaminated and uncontaminated containers
JPH0776759B2 (ja) * 1989-01-19 1995-08-16 ザ・コカ‐コーラ・カンパニー 回収容器選別方法
US5352611A (en) * 1992-06-01 1994-10-04 The Coca-Cola Company Method and system for sampling and determining the presence of compounds in containers
DE4322328A1 (de) * 1993-07-05 1995-01-12 Henkel Kgaa Verfahren zur Eliminierung migrierter Bestandteile aus Mehrweg-Kunststoffgebinden für Lebensmittel
DE4408842C2 (de) * 1994-03-16 1996-11-21 Till Gea Gmbh & Co Verfahren und Anlage zur Steuerung von Gebinden in Reinigungs- und/oder Abfüllanlagen
DE4427577C2 (de) * 1994-08-04 2000-07-20 Krones Ag Verfahren und Vorrichtung zur Kontrolle einer thermischen Behandlung von Flaschen oder dgl.

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Also Published As

Publication number Publication date
NO986197L (no) 1998-12-30
AU3435897A (en) 1998-01-21
DE19626137A1 (de) 1998-01-08
WO1998000245A1 (fr) 1998-01-08
AU714410B2 (en) 2000-01-06
NO986197D0 (no) 1998-12-30

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