Silage solution targets high value FPC

Vessel using PG Flow Solutions system PG Flow Solutions' PG Silage adapts to critical temperature levels of different fish proteins and oils, through remote monitoring of tanks, piping and pumps from the bridge or control tower

A new silage solution has been designed to produce high quality fish protein concentrate (FPC) that maximises market value.

Approximately 2,700 tonnes of fish is required to generate 1,000 tonnes of fish fillet. The remaining 1,700 tonnes is fish waste and PG Flow Solutions’ PG Silage has been designed to reduce this to approximately 310m3 of fish oil and 530m3 concentrated FPC.

“It is about exploiting the full potential of white fish. Our aim is to increase the price fishing vessels can obtain for their silage from today’s NOK 2 per kilogram to NOK 12-15 per kilogram. More importantly, our solution does this without taking up valuable cargo space,” said Roy Norum, CEO of PG Flow Solutions.

Minimal space

The company’s treatment system is designed so that treatment and storage tanks are integrated into the vessel hull, to avoid taking up fillet storage space. It is aimed at long-distance fishing vessels, typically 70-100m long, that have quotas that allow them to operate relatively far from home port for weeks at a time. The concentrated product can also be stored up to two months.

PG Silage aims to handle almost all types of white fish as it can easily adapt to critical temperature levels of different fish proteins and oils, through remote monitoring of tanks, piping and pumps from the bridge or control tower.

The PG Silage process gathers fresh raw material in a tank directly under the onboard fillet machine. After milling, the autolysis process takes place and the majority of the fish bone is separated.

Oil separation

The silage is then transported to another tank, which is heated up to its maximum tolerance level in order to separate the fish oil and move it into a separate storage tank. The silage is then moved to a new tank, where remaining liquids are extracted through evaporation.

When sufficiently evaporated, the silage is moved to storage tanks that allows it to be sold as fresh, high quality FPC.

Approximately 30% of a white fish is used for human consumption. The rest of the fish is primarily utilised for animal feed purposes.



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