Chemical apparatus and process disinfecting – deodorizing – preser – Process disinfecting – preserving – deodorizing – or sterilizing – Using microwave energy
Patent
1992-04-14
1994-06-14
Housel, James C.
Chemical apparatus and process disinfecting, deodorizing, preser
Process disinfecting, preserving, deodorizing, or sterilizing
Using microwave energy
422 25, 422108, 422112, 422116, 422307, 219759, 219686, A61L 212
Patent
active
053208048
ABSTRACT:
A process for rapidly sterilizing biological media, such as broths and gels used as incubation or growth media to test the presence of microorganisms, such as bacteria, includes applying microwave radiation to such an aqueous biological medium contained in a microwave transmissive pressure retaining container, such as a capped cylinder made of polytetrafluoroethylene, which cap is preferably equipped with ports, by directing the microwave radiation through the container and onto the medium in such amount that the pressure in the container and the temperature of the medium are raised above ambient pressure and temperature, and maintaining such raised pressure and temperature for a time sufficient to sterilize the medium. In a preferred operation the microwave heating at elevated pressure and temperature takes place for about five minutes, the pressure during that time is 30 to 50 psig, the microwave heating of the medium takes place in a radiation confining chamber of a microwave apparatus, a plurality of containers for the biological medium is present in such chamber, the containers are kept in motion by an oscillating turntable, and the pressure in at least one container is monitored and the application of microwave radiation is controlled in response to that pressure. In a broader process aspect the contained material is heated but not necessarily sterilized. Also within the invention is the apparatus utilized in the described process.
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Neas Edwin D.
Zakaria Zairani
CEM Corporation
Housel James C.
Kramer Raymond F.
Snay Jeffrey R.
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