Does Lyophilization Kill Bacteria?

Freeze-drying foods doesn't kill most bacteria or viruses, though many become dormant during the freeze-drying and storage process. ... Freeze-drying is a low-temperature dehydration process that takes place through three interdependent and distinct stages – namely freezing, sublimation, and desorption.

Can bacteria survive lyophilization?

Lyophilization Medium - Bacteria need a lyoprotectant which helps them survive the freeze drying process. This medium can be very simple, such as 10% skim milk, or complicated such as those that use animal sera.

How does lyophilization completely destroys microbial life?

Desiccation. ... Lyophilization combines both exposure to cold temperatures and desiccation, making it quite effective for controlling microbial growth. The water content of foods and materials, called the water activity, can be lowered without physical drying by the addition of solutes such as salts or sugars.