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The Hydroclave high level of sterilization The Hydroclave was
thoroughly tested by the University of Ottawa, Department of
Microbiology and Immunology, with the following results: The researches found the Hydroclave "highly suitable" for the treatment of infectious waste.
The Ontario Ministry of Health noted that "the data would indicate that
the Hydroclave is capable of sterilizing biomedical waste after 15
minutes and 132 C".
The Ontario Ministry of Environment/Energy
agreed that: "waste which is treated to this degree is deemed to be
sterilized and can be disposed of as municipal waste at a municipal
landfill site".
The protocol for the testing was submitted to the Ontario Ministry of Health. Once the approval was given, the testing was conducted according to the submitted protocol, at the Kingston General Hospital, on the prototype Hydroclave vessel between October 1995 and November 1995. The biological indicators used were the Bacillus Stearothermophilus and Bacillus Subtilis var. niger at population levels of 4 log10, 5 log10, 6 log10. Although a 4 log10 reduction is acceptable for the treatment of biomedical waste, the Hydroclave achieved a 6 log10 reduction (sterility) which is well beyond the capability of other non-incinerative treatment methods using the same treatment time.
The concluding remarks from the University of Ottawa report
state that:
"the Hydroclave appears to be highly suitable for the treatment of
biomedical waste and can achieve an inactivation of microbial load
of 106 equivalent of B. Stearothermophilus within 30 minutes @ 121°
C. or within 15 minutes @ 132° C. Although the cycle time may be
able to be shortened even further @ 132° C., 15 minutes is a
relatively practical time frame and a shorter exposure may be
unnecessary."
- State of the Art Tracking System - Hydroclave Disposal
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