6000-SX extruder cutter fitted with salmon feed die inserts

Typical aquaculture extrusion process




Aquaculture is an important industry that is destined to continue to expand as the global native fish stocks are finite and the demand for seafood of all types is on the rise.

The production of feeds for aquaculture has several challenges, the feed must be water stable, have high conversion rates while ensuring a low ecological impact. For these reasons extrusion technology is the best choice for the production of aquaculture feeds.

One of the main requirements when producing a fish feed is obtaining the correct density of the pellet to suit the particular fish species, whether it needs to be floating for top feeding fish, sinking for bottom feeders or slow sinking for mid level feeding fish.

JSC extrusion use several strategies to adjust and control the pallet density. The extruder barrel and screw elements are modular and come in various designs to allow for different shear/temperature profiles. Our machines utilise cooling jackets on the barrels to help control the product temperature. In addition conical sections can be added to the end of the extruder before the die plate to increase product density.

Additional means of control include water injection into the product, as well as being able to alter the main extruder screw speed and feed rate.

We are able to supply a complete aquaculture production system from extrusion, drying, oil coating (if required) and final pellet cooling along with air handling and conveying systems.

We have systems installed around the world producing aquaculture feeds such as prawn & shrimp feed, floating fin fish feed, abalone feed, salmon feed, catfish... and more