Could a practice which began decades ago,
primarily for increasing palatability in extruded pet foods, transform aquatic
feed manufacture over the coming decades? Extruded aquafeed manufacture
currently relies on utilisation of processed animal meals. The ability to do
away with the rendering process and utilise fresh fish, terrestrial animal
by-product, de-watered algae or other wet by-products directly through the
extrusion process has the potential to reduce/replace requirement for rendering,
lower process energy requirements, increase palatability, lower protein/nutrient
damage, increase feed value, improve FCR and lower cost. Whilst fresh meat
inclusion is not new to extrusion, its inclusion has previously been limited.
Wenger Manufacturing have developed the “Thermal Twin” extruder, designed to
maximise thermal energy inputs and allow for inclusion of high moisture content
raw materials at inclusion rates in excess of 50%, in a revolutionary process
which could change the way we utilise raw material sources.
This blog is maintained by The Aquaculturists staff and is supported by the magazine International Aquafeed which is published by Perendale Publishers Ltd.
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