CA2021411A1 - Method and contrivance for sterilizing, disinfecting and/or drying - Google Patents
Method and contrivance for sterilizing, disinfecting and/or dryingInfo
- Publication number
- CA2021411A1 CA2021411A1 CA002021411A CA2021411A CA2021411A1 CA 2021411 A1 CA2021411 A1 CA 2021411A1 CA 002021411 A CA002021411 A CA 002021411A CA 2021411 A CA2021411 A CA 2021411A CA 2021411 A1 CA2021411 A1 CA 2021411A1
- Authority
- CA
- Canada
- Prior art keywords
- vessel
- fact
- contrivance
- mixing mechanism
- vacuum
- 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.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
- F26B5/048—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum in combination with heat developed by electro-magnetic means, e.g. microwave energy
-
- 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
- A61L11/00—Methods specially adapted for refuse
-
- 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
- A61L2/12—Microwaves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B7/00—Drying solid materials or objects by processes using a combination of processes not covered by a single one of groups F26B3/00 and F26B5/00
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/78—Arrangements for continuous movement of material
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2206/00—Aspects relating to heating by electric, magnetic, or electromagnetic fields covered by group H05B6/00
- H05B2206/04—Heating using microwaves
- H05B2206/045—Microwave disinfection, sterilization, destruction of waste...
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Veterinary Medicine (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- Epidemiology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
- Drying Of Solid Materials (AREA)
Abstract
ABSTRACT
The invention concerns a method for sterilizing, disinfecting and/or drying pourable, pasty or liquid materials in loose form using microwave energy in a closed vessel, and using pressure or vacuum together with the microwave energy.
The invention concerns a method for sterilizing, disinfecting and/or drying pourable, pasty or liquid materials in loose form using microwave energy in a closed vessel, and using pressure or vacuum together with the microwave energy.
Description
Method and Contrivance for Sterilizing, Disinfecting and/or Drying The invention concerns a method for sterilizing, disinfecting and/or drying of pourable, pasty or liquid materials in loose form using microwave energy in a closed vessel, along with a contrivance for carrying out the method.
Already known per se is how to disinfect hospital waste by microwave heating. A system of this kind is described in a promotional brochure of the firm Vetco Sanitec GmbH. The hospital waste in a system of this type is first mechanically comminuted, next moistened and then run past microwave units by means of a worm conveyor in order to disinfect the waste by rapid, targeted heating to the boiling point of water, and to push it out to the depository in this comminuted form. It is clear that the material to be disinfected does not have to be carefully handled here since it actually next lands in a refuse depository or the like, so that the desired disin-fection can always be achieved by strong comminuting and high tem-peratures.
However, if pourable, pasty or liquid materials are to be carefully made germ-free or if pourable or pasty materials are to be dried without the properties and the quality of these materials being im-paired, then the known method is often not usable because of the J required comminuting and high temperatures.
.
Known from DE-OS 3,612,606 is a method for sterilizing and/or disin-fecting pharmaceutical preparations wherewith treatment is carried out in closed ampoules with the aid of microwaves at a temperature that is required for sterilization. However, because of this raising of the temperature, there occurs in the ampoule an overpres-sure, so that there exists here the danger of destruction. For this reason, proposed in the case of this known method is to undertake the microwave treatment of materials found in ampoules in a pressure vessel under an overpressure, so that the ampoules can not burst.
Known from DE-OS 2,446,471 is a method for drying and sterilizing by means of microwaves, with the product to be treated likewise being accommodated in ampoules. To increase the drying action' treatment is done in a closed vessel using continuous change in pressure, and indeed beginning with atmospheric pressure, then vacuum, then overpressure, etc. By doing this, the vapors contained in the product to be treated are removed in a closed housing without the effectiveness of the microwaves utilized being impaired thereby.
The object of the present invention is to propose a method - along with an appropriate contrivance - wherewith is guaranteed a particu-larly careful but nevertheless effective treatment of materials in loose form.
In accordance with the invention, the method of the initially-men-tioned type is characterized by using pressure or vacuum together with microwave eneryy, whereby the materials in the vessel are simultaneously rolled around.
Sterilizing or disinfecting of materials can be accomplished either under pressure or under vacuum. In the case of utilization of pres-sure, steam can advantageously be introduced into the closed vessel.
If the method in accordance with the invention is used for drying pourable or pasty materials, vacuum is used so that, in particular in connection with the rolling around of the materials inside the ~J vessel, the moisture is effectively extracted.
, One advantageous contrivance for carrying out the method in accord-ance with the invention is characterized by the fact that the vessel is constructed pressure- and/or vacuum-tight as well as microwave-tight and that one or several microwave units are disposed outside the vessel, and that their microwave energy can be fed into the ves-sel from the outside via injection openings. This injection of microwave energy from the outside has the essential advantage that the microwave units can be disposed outside the vessel and therewith ,are not exposed to the pressure or vacuum prevailing inside the ves-~,~ sel, as well as to the possibly disadvantageous influence of the ,: .
materials to be treated; furthermore, it is possible to maintain theinside space of the vessel free of projections and dead corners in which the materials to be treated could otherwise clog. The injec-tion openings for the microwave units can be closed off in simple fashion by closure pieces made of dielectric material in order to also close off the vessel at these places in a pressure- and/or vacuum-tight fashion.
In order to expose the materials to be treated in the vessel to the microwave energy as uniformly as possible, preferably arranged in-~J side the vessel is a mixing mechanism. Additionally achieved bymeans of a mixing mechanism of this type is that the materials to be treated can be conveyed, in a desired manner, from the region of a filling opening into the region of an emptying shaft.
According to an advantageous form of embodiment, the vessel is con-structed as a horizontal, cylindrical container. This method of construction enables not only the use of a double-worm counterflow mixing mechanism for the very effective rolling about of the materi-als to be treated inside the vessel, the vessel along with the entire contrivance rather being capable of being clamped in the region of the face walls of the vessel in a simple manner by means of brac~ets.
J
In practical fashion, the mixing mechanism is driven from the out-side at selectable, different speeds, with the bearing shaft of the mixing mechanism being brought out through pressure- and/or vacuum-tight stuffing boxes. A simple loading and emptying of the material to be treated into andtor out from the vessel is then possible if the vessel is provided at one end with a closable filling opening and on the underside with a closable emptying shaft. Furthermore, it is practical to provide, laterally, closable cleaning openings.
The microwave units are preferably arranged on the top side in the middle region of the vessel.
The method of construction with brackets for supporting the entire contrivance has the advantage, in accordance with another advanta-geous form of embodiment, that the brackets can be supported on four foot points in which are mounted weighing cells. In this manner, it is possible to determine the quantity of material to be treated.
The invention will be explained in more detail in the following with the aid of an example of embodiment, while referring to the accom-panying drawings.
J Fig. 1 shows a side view of the contrivance in accordance with the invention, and Fig. 2 shows a cut along the line II-II of Fig. 1.
The contrivance shown in Fig. 1 and 2 contains a cylindrical vessel 1 that is disposed in horizontal fashion. Attached to the front walls 2 are brackets 3 that rest by means of four weighing cells 4 on a mounting base 5. By means of these weighing cells 4 it is possible to weigh out the weight of the entire contrivance in the empty condition and in the filled condition, and therewith to deter-mine the weight of the poured-in materials. Provided on the top side of the cylindrical vessel 1 are several microwave units 6, the J microwave energy of which can be fed into the cylindrical inner space of the vessel 1 via the injection openings 17. The injection openings 17 are closed off in pressure- and/or vacuum-tight fashion by closure pieces 14 made of a dielectric material.
Located at one end of the cylindrical vessel 1 is a filling opening 9 and/or a filling stub to which is connected a filling hopper 11 for easier pouring in of the materials to be treated. Disposed on the underside of the vessel 1 is an emptying shaft 10 via which the treated materials can be emptied out. The filling opening 9 as well as the emptying shaft 10 are both capable of being closed off, in the case of the emptying shaft 10 by means of an appropriate hinged cover. The materials to the treated are present in loose form, i.e.
they are not in containers or bundles.
Provided inside the cylindrical vessel 1 is a mixing mechanism 16 which, in the present example, is constructed as a double-worm counterflow mixing mechanism, in order to enable an effective rolling about of the materials to be treated inside the container 1.
This leads to a particularly uniform and careful treatment. The mixing mechanism 16 is supported on the face sides of the vessel 1, and the bearing shaft 18 is brought out through pressure-tight ~J and/or vacuum-tight stuffing boxes. Connected at the one end of the bearing shaft 18, via a gear train 13, is a drive motor 12 with which the mixing mechanism 16 can be driven at a suitable speed.
The rotational speed (rpm) of the mixing mechanism 16 can be varied by an appropriate adjusting or regulating contrivance.
Since the vessel l is closed on ail sides, but occasionally a clean-ing or an inspection of the inside, in particular of the mixing mechanism 16, can be required, provided laterally are two cleaning openings 7 that are closed via pressure- and/or vacuum-tight covers.
i Provided at the filler stub of the filling opening 9 is a vacuum/
pressure connection 15 via which the inside of the vessel 1 can be placed under pressure or be evacuated. AdditionaLly provided, pre-ferentailly in the lower region, is a steam connection 19, via which steam can also be introduced selectably when removing germs or sterilizing for the purpose of wetting and additionally heating the product to be treated.
The vessel 1 of the contrivance in accordance with the invention is preferably constructed both pressure-tight and vacuum-tight; this also applies for the other components such as stuffing boxes, covers, etc. With a contrivance of this type , the materials to be treated can then be treated selectably either under pressure removal of germs and/or sterilizing) or vacuum ~drying as well as , ' '~ ' '~' removal of germs or sterilizing also), depending upon effectiveness and compatibility. However, it is also possible to design the vessel 1 to be only pressure-tight or only vacuum-tight; in this case, only the one or the other type of treatment is possible.
Instead of the double-worm counterflow mixing mechanism used in the example of embodiment, it is also possible to use other types of mixing mechanisms or roller contrivances, e.g. an impact-beater mixing mechanism.
~J
Already known per se is how to disinfect hospital waste by microwave heating. A system of this kind is described in a promotional brochure of the firm Vetco Sanitec GmbH. The hospital waste in a system of this type is first mechanically comminuted, next moistened and then run past microwave units by means of a worm conveyor in order to disinfect the waste by rapid, targeted heating to the boiling point of water, and to push it out to the depository in this comminuted form. It is clear that the material to be disinfected does not have to be carefully handled here since it actually next lands in a refuse depository or the like, so that the desired disin-fection can always be achieved by strong comminuting and high tem-peratures.
However, if pourable, pasty or liquid materials are to be carefully made germ-free or if pourable or pasty materials are to be dried without the properties and the quality of these materials being im-paired, then the known method is often not usable because of the J required comminuting and high temperatures.
.
Known from DE-OS 3,612,606 is a method for sterilizing and/or disin-fecting pharmaceutical preparations wherewith treatment is carried out in closed ampoules with the aid of microwaves at a temperature that is required for sterilization. However, because of this raising of the temperature, there occurs in the ampoule an overpres-sure, so that there exists here the danger of destruction. For this reason, proposed in the case of this known method is to undertake the microwave treatment of materials found in ampoules in a pressure vessel under an overpressure, so that the ampoules can not burst.
Known from DE-OS 2,446,471 is a method for drying and sterilizing by means of microwaves, with the product to be treated likewise being accommodated in ampoules. To increase the drying action' treatment is done in a closed vessel using continuous change in pressure, and indeed beginning with atmospheric pressure, then vacuum, then overpressure, etc. By doing this, the vapors contained in the product to be treated are removed in a closed housing without the effectiveness of the microwaves utilized being impaired thereby.
The object of the present invention is to propose a method - along with an appropriate contrivance - wherewith is guaranteed a particu-larly careful but nevertheless effective treatment of materials in loose form.
In accordance with the invention, the method of the initially-men-tioned type is characterized by using pressure or vacuum together with microwave eneryy, whereby the materials in the vessel are simultaneously rolled around.
Sterilizing or disinfecting of materials can be accomplished either under pressure or under vacuum. In the case of utilization of pres-sure, steam can advantageously be introduced into the closed vessel.
If the method in accordance with the invention is used for drying pourable or pasty materials, vacuum is used so that, in particular in connection with the rolling around of the materials inside the ~J vessel, the moisture is effectively extracted.
, One advantageous contrivance for carrying out the method in accord-ance with the invention is characterized by the fact that the vessel is constructed pressure- and/or vacuum-tight as well as microwave-tight and that one or several microwave units are disposed outside the vessel, and that their microwave energy can be fed into the ves-sel from the outside via injection openings. This injection of microwave energy from the outside has the essential advantage that the microwave units can be disposed outside the vessel and therewith ,are not exposed to the pressure or vacuum prevailing inside the ves-~,~ sel, as well as to the possibly disadvantageous influence of the ,: .
materials to be treated; furthermore, it is possible to maintain theinside space of the vessel free of projections and dead corners in which the materials to be treated could otherwise clog. The injec-tion openings for the microwave units can be closed off in simple fashion by closure pieces made of dielectric material in order to also close off the vessel at these places in a pressure- and/or vacuum-tight fashion.
In order to expose the materials to be treated in the vessel to the microwave energy as uniformly as possible, preferably arranged in-~J side the vessel is a mixing mechanism. Additionally achieved bymeans of a mixing mechanism of this type is that the materials to be treated can be conveyed, in a desired manner, from the region of a filling opening into the region of an emptying shaft.
According to an advantageous form of embodiment, the vessel is con-structed as a horizontal, cylindrical container. This method of construction enables not only the use of a double-worm counterflow mixing mechanism for the very effective rolling about of the materi-als to be treated inside the vessel, the vessel along with the entire contrivance rather being capable of being clamped in the region of the face walls of the vessel in a simple manner by means of brac~ets.
J
In practical fashion, the mixing mechanism is driven from the out-side at selectable, different speeds, with the bearing shaft of the mixing mechanism being brought out through pressure- and/or vacuum-tight stuffing boxes. A simple loading and emptying of the material to be treated into andtor out from the vessel is then possible if the vessel is provided at one end with a closable filling opening and on the underside with a closable emptying shaft. Furthermore, it is practical to provide, laterally, closable cleaning openings.
The microwave units are preferably arranged on the top side in the middle region of the vessel.
The method of construction with brackets for supporting the entire contrivance has the advantage, in accordance with another advanta-geous form of embodiment, that the brackets can be supported on four foot points in which are mounted weighing cells. In this manner, it is possible to determine the quantity of material to be treated.
The invention will be explained in more detail in the following with the aid of an example of embodiment, while referring to the accom-panying drawings.
J Fig. 1 shows a side view of the contrivance in accordance with the invention, and Fig. 2 shows a cut along the line II-II of Fig. 1.
The contrivance shown in Fig. 1 and 2 contains a cylindrical vessel 1 that is disposed in horizontal fashion. Attached to the front walls 2 are brackets 3 that rest by means of four weighing cells 4 on a mounting base 5. By means of these weighing cells 4 it is possible to weigh out the weight of the entire contrivance in the empty condition and in the filled condition, and therewith to deter-mine the weight of the poured-in materials. Provided on the top side of the cylindrical vessel 1 are several microwave units 6, the J microwave energy of which can be fed into the cylindrical inner space of the vessel 1 via the injection openings 17. The injection openings 17 are closed off in pressure- and/or vacuum-tight fashion by closure pieces 14 made of a dielectric material.
Located at one end of the cylindrical vessel 1 is a filling opening 9 and/or a filling stub to which is connected a filling hopper 11 for easier pouring in of the materials to be treated. Disposed on the underside of the vessel 1 is an emptying shaft 10 via which the treated materials can be emptied out. The filling opening 9 as well as the emptying shaft 10 are both capable of being closed off, in the case of the emptying shaft 10 by means of an appropriate hinged cover. The materials to the treated are present in loose form, i.e.
they are not in containers or bundles.
Provided inside the cylindrical vessel 1 is a mixing mechanism 16 which, in the present example, is constructed as a double-worm counterflow mixing mechanism, in order to enable an effective rolling about of the materials to be treated inside the container 1.
This leads to a particularly uniform and careful treatment. The mixing mechanism 16 is supported on the face sides of the vessel 1, and the bearing shaft 18 is brought out through pressure-tight ~J and/or vacuum-tight stuffing boxes. Connected at the one end of the bearing shaft 18, via a gear train 13, is a drive motor 12 with which the mixing mechanism 16 can be driven at a suitable speed.
The rotational speed (rpm) of the mixing mechanism 16 can be varied by an appropriate adjusting or regulating contrivance.
Since the vessel l is closed on ail sides, but occasionally a clean-ing or an inspection of the inside, in particular of the mixing mechanism 16, can be required, provided laterally are two cleaning openings 7 that are closed via pressure- and/or vacuum-tight covers.
i Provided at the filler stub of the filling opening 9 is a vacuum/
pressure connection 15 via which the inside of the vessel 1 can be placed under pressure or be evacuated. AdditionaLly provided, pre-ferentailly in the lower region, is a steam connection 19, via which steam can also be introduced selectably when removing germs or sterilizing for the purpose of wetting and additionally heating the product to be treated.
The vessel 1 of the contrivance in accordance with the invention is preferably constructed both pressure-tight and vacuum-tight; this also applies for the other components such as stuffing boxes, covers, etc. With a contrivance of this type , the materials to be treated can then be treated selectably either under pressure removal of germs and/or sterilizing) or vacuum ~drying as well as , ' '~ ' '~' removal of germs or sterilizing also), depending upon effectiveness and compatibility. However, it is also possible to design the vessel 1 to be only pressure-tight or only vacuum-tight; in this case, only the one or the other type of treatment is possible.
Instead of the double-worm counterflow mixing mechanism used in the example of embodiment, it is also possible to use other types of mixing mechanisms or roller contrivances, e.g. an impact-beater mixing mechanism.
~J
Claims (15)
1. Method for sterilizing, disinfecting and/or drying of pourable, pasty or liquid materials in loose form using microwave energy in a closed vessel, characterized by the use of pressure or vacuum together with the microwave energy.
2. Method for sterilizing or disinfecting using pressure in accordance with Claim 1, characterized by the fact that steam is additionally introduced into the closed vessel.
3. Method for drying pourable or pasty materials in accordance with Claim 1, characterized by the fact that a vacuum is employed.
4. Method according to one of the Claims 1 to 3, characterized by the fact that the materials in the vessel in loose form are simulta-neously rolled about.
5. Contrivance for carrying out the method based on one of the preceding Claims, characterized by the fact that the vessel (1) is constructed pressure- and/or vacuum-tight as well as microwave-tight and that one or several microwave units (6) are disposed outside the vessel (1) and their microwave energy can be fed into the vessel (1) from the outside via injection openings (17).
6. Contrivance according to Claim 5, characterized by the fact that the injection openings (17) are closed off by closure pieces (14) made of dielectric material.
7. Contrivance according to Claim 5 or 6, characterized by the fact that there is disposed in the vessel (1) a mixing mechanism (16).
8. Contrivance according to one of the Claims 5 to 7, character-ized by the fact that the vessel (1) is constructed as a horizontal, cylindrical container.
9. Contrivance according to Claim 7, characterized by the fact that the mixing mechanism (16) can be externally driven at selecta-bly different speeds and that the bearing shaft (18) of the mixing mechanism (16) is brought out through pressure- and/or vacuum-tight stuffing boxes (8).
10. Contrivance according to Claim 8, characterized by the fact that the vessel (1) is provided on the top side, at one end, with a closable filling opening (9) and on the underside with a closable emptying shaft (10).
11. Contrivance according to Claim 10, characterized by the fact that provided laterally are closable cleaning openings (7).
12. Contrivance according to Claim 10 or 11, characterized by the fact that the microwave units (6) are disposed at the top side, in the center region of the vessel (1).
13. Contrivance according to one of the Claims 8 to 12, character-ized by the fact that the mixing mechanism (16) is constructed as a double-worm counterflow mixing mechanism.
14. Contrivance according to Claim 8, characterized by the fact that fastened in the region of the face walls (2) of the vessel (1) are brackets (3) for supporting the entire contrivance.
15. Contrivance according to Claim 14, characterized by the fact that the brackets (3) are supported on four foot-points in which are installed weighing cells (4).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3923841.5-41 | 1989-07-19 | ||
| DE3923841A DE3923841C2 (en) | 1989-07-19 | 1989-07-19 | Sterilization method and apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2021411A1 true CA2021411A1 (en) | 1991-01-20 |
Family
ID=6385349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002021411A Abandoned CA2021411A1 (en) | 1989-07-19 | 1990-07-18 | Method and contrivance for sterilizing, disinfecting and/or drying |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0408946B1 (en) |
| CA (1) | CA2021411A1 (en) |
| DE (2) | DE3923841C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10882798B2 (en) | 2014-07-24 | 2021-01-05 | Fasthum S.R.L. | Plant and process for fast humification and biostabilization and product obtained therefrom |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4103455A1 (en) * | 1991-02-06 | 1992-08-13 | Krauss Maffei Ag | MIXER DRYERS |
| DE4115408A1 (en) * | 1991-05-10 | 1992-11-12 | Sicowa Verfahrenstech | METHOD AND DEVICE FOR DRYING SLUDGE OR DAMP DUMP |
| DE4201491A1 (en) * | 1992-01-21 | 1993-07-22 | Telemit Electronic Gmbh | Disinfecting appts. using microwave energy - has locking bolt and seal assembly to give sealed lid locking action, useful for medical material |
| WO1994007545A1 (en) * | 1992-10-02 | 1994-04-14 | Belinox Ag | Medical waste disinfecting and sterilising apparatus and process for operating the same |
| FR2717083B1 (en) * | 1994-03-11 | 1996-05-31 | Sgn Soc Gen Tech Nouvelle | Sterilization process by high frequency treatment of hazardous waste, in particular hospital waste and associated device. |
| EP0705608B1 (en) * | 1994-10-05 | 1999-02-03 | Helmut Dr. Katschnig | Installation for sterilizing and/or disinfecting pumpable or free-flowing matter |
| FR2757063A1 (en) * | 1996-12-13 | 1998-06-19 | Eskom | METHOD AND DEVICE FOR TREATING MATERIALS, ESPECIALLY STERILIZING INFECTIOUS MEDICAL WASTE |
| SE518999C2 (en) * | 1999-03-01 | 2002-12-17 | Milproc Miljoeprocesser Ab | Procedure for hygienizing and drying organic material |
| FR2900224B1 (en) * | 2006-04-21 | 2008-07-04 | Bearn Innovation Bernard Dedie | METHOD FOR DRYING SLUDGE AND DEVICE FOR IMPLEMENTING THE METHOD |
| EP2139827A1 (en) * | 2007-04-13 | 2010-01-06 | Tecnoimpianti SRL | Plant and process for transformation of organic material |
| US8216623B2 (en) | 2009-04-07 | 2012-07-10 | Frito-Lay North America, Inc. | Flavor infused nut snack |
| CN107965992A (en) * | 2017-12-29 | 2018-04-27 | 天津莱沃真空干燥设备制造有限公司 | The device and application method of a kind of superfines of dried recovered containing volatile solvent |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3670891A (en) * | 1970-05-04 | 1972-06-20 | Wallace Peyton Allen | Microwave sewage treatment system |
| BE803292A (en) * | 1973-08-07 | 1973-12-03 | Vandekerckhove Constr | MIXING GEAR, MORE SPECIAL FOR STERLISERS AS USED FOR MEAT WASTE AND SUCH PROCESSING INRINCHATION |
| FR2247388B1 (en) * | 1973-10-12 | 1977-08-05 | Anrep Rene | |
| DE7905742U1 (en) * | 1979-03-02 | 1982-10-21 | Göldner, Helmut, 8967 Oy-Mittelberg | DEVICE FOR DISINFECTING AND STERILIZING OBJECTS WITH BODIES |
| GB8428470D0 (en) * | 1984-11-10 | 1984-12-19 | Wales College Of Medicine Univ | Sterilising procedures and equipment |
| JPS62186770A (en) * | 1986-02-12 | 1987-08-15 | Toppan Printing Co Ltd | Sterilization of white sauce |
| DE3612606A1 (en) * | 1986-04-15 | 1988-02-18 | Ruediger Prof Dr Groening | Method of disinfecting base materials and formulations used in the fields of pharmacy, technology and foodstuff technology, using microwaves |
| US4829679A (en) * | 1987-12-07 | 1989-05-16 | Micro Dry, Incorporated | Microwave drying and sanitizing of fabric |
| DE8904885U1 (en) * | 1989-04-19 | 1989-06-15 | Vetco Sanitec GmbH, 3100 Celle | Microwave chamber for thermal treatment of particulate, moistened objects |
| DE3913472A1 (en) * | 1989-04-24 | 1990-10-25 | Pilema S R L | METHOD FOR STERILIZING MEDICAL WASTE |
-
1989
- 1989-07-19 DE DE3923841A patent/DE3923841C2/en not_active Expired - Fee Related
-
1990
- 1990-06-29 DE DE90112403T patent/DE59005066D1/en not_active Expired - Fee Related
- 1990-06-29 EP EP90112403A patent/EP0408946B1/en not_active Expired - Lifetime
- 1990-07-18 CA CA002021411A patent/CA2021411A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10882798B2 (en) | 2014-07-24 | 2021-01-05 | Fasthum S.R.L. | Plant and process for fast humification and biostabilization and product obtained therefrom |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3923841C2 (en) | 1997-04-24 |
| EP0408946A2 (en) | 1991-01-23 |
| EP0408946B1 (en) | 1994-03-23 |
| EP0408946A3 (en) | 1992-04-01 |
| DE59005066D1 (en) | 1994-04-28 |
| DE3923841A1 (en) | 1991-01-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |