Transcript Non-Thermal Preservation

Non-Thermal Preservation
Definition


Involves manipulating the properties
of food or its environment without
using heat.
Examples include:




Irradiation
Ohmic heating
Ozonation
High pressure processing
D 9.01 -- Non-Thermal Preservation
Irradiation


Exposure of food to
ionizing radiation for
preservation
In the U.S.
irradiated foods are
required to be
labeled.
D 9.01 -- Non-Thermal Preservation
Ohmic Heating

Food is subjected to
an alternating
current flow between
two electrodes.
D 9.01 -- Non-Thermal Preservation
Ozonation

Water treatment
process used to
destroy
microorganisms by
ozone, a gas
produced by exposure
of oxygen molecules
to high electric
voltage
D 9.01 -- Non-Thermal Preservation
High Pressure Processing

Preservation method
where liquid and solid
foods are subjected to
pressures of 45,000
pounds per square
inch or higher.
D 9.01 -- Non-Thermal Preservation