• Twin Screw Extruder / Thermo-mechanical
cooking
The preconditioned feed mix is submitted to the
controlled thermo-mechanical cooking which is
the main stage in extruding aquafeeds.
Thermo-mechanical cooking of the feed mix in an
extruder requires two energy inputs :
- Mechanical energy input defined mainly by
screw speed and screw configuration which can
be varied extensively to modulate this energy and,
- Thermal energy input determined by direct steam
heating and indirect barrel heating.