In particular, pharmaceutical applications often require sterilization between each cycle of the freeze-drying process. A common method of sterilization is pressurized steam, which requires the freeze dryer chamber to be a certified pressure vessel, rated at 2 atmospheres at 131oC.
Food and pet food are delicate commodities that require optimal processing. Product integrity and safety are paramount during the drying process.
Pressurized steam sterilization adds significant complexity and cost to freeze dryers. On the other hand, the hydrogen peroxide method generally reduces costs.
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