From July 2011 newsletter
Pasteurisation of dry ingredients
* image used with permission
We have installed a major new piece of equipment for pasteurising
dry ingredients.This will allow us to work with clients to quantify the
heat processing that their products require to achieve the desired
microbiological reduction. The system can be used for any product
that can be conveyed via vibration, that is not water soluble and that
does not become too sticky if brought into contact with steam.
There has been growing interest in problems associated with
uncooked nuts, seeds, spices and other dry ingredients, which
potentially carry Salmonella. The equipment heats these ingredients
to kill vegetative pathogens. It consists of two spirals, one for heating
and one for drying and cooling. Steam is introduced into the
heating coil as desired, typically in the first few loops of the spiral.
The pipe walls are electrically heated to a maximum of 400°C, while
the steam can be superheated to 180°C. After steam injection the
heated pipe can be used to remove residual moisture.
This new system complements the long-standing expertise at
Campden BRI in heat processing and microbiological heat resistance.
Contact: Craig Leadley
+44(0)1386 842059
craig.leadley@campdenbri.co.uk