Fjell onboard fishmeal plant and fish oil plant

Grinding - Cooking - Pressing - Separation - Oil-polishing - Drying - Milling and cooling - Storage

Process description

• Grinding : This first step ensures that even bits of residue are passed on - and is important as the first barrier to fishing hooks and other elements that are not wanted in the further process.
• Cooking : The screw cooker is designed as a large slowly rotating screw conveyor with steam heated outer pipe and hollow steam heated flighting allowing heating of the raw material to about 90°C to secure complete coagulation.
• Pressing: Depending on layout coagulated material is then pressed through a screw press for squeezing out press liquids, and the press cake is dropped or conveyed directly into the drier.
• Separation: The liquid from the press is directed to the tricanter, which in one single step is able to separate the liquid into solids, stickwater and fish oil. Alternatively for better separation a decanter is used in combination with a separator.
• Oil-polishing: Oil can be further treated in a polisher for optimum quality (optional). After polishing the oil is stored at cooled tanks.
• Evaporation: The evaporator system evaporates and concentrates the decanter liquids, containing up to 20% of the total proteins (water soluble), producing a concentrate.
• Drying: The dryer evaporates the water from the solids (press cake, decanter solids, and concentrate). The combination of gentle rotation and evaporations result in a fishmeal with approximately 10 % residual water.
• Milling and cooling: Warm and bony fish meal is conveyed to the hammer mill before cooling and transporting to meal silo as reservoir for bagging. Transport may be by means of cooling screw conveyors or pneumatic system.
• Energy saving and durability : Patented solutions for energy saving will be comined with world class equipment and competence in the design of state of the art fishmeal and fish oil plants.