Dried fish sludge from Andfjord Salmon’s land-based aquaculture facility has the potential to be used in growth media such as organic fertiliser and organo-mineral fertiliser for agriculture and gardening, a new report has found.
The Norwegian Institute of Bioeconomy Research (NIBIO) produced the report on behalf of Andøytorv AS and Andfjord Salmon AS. The research institution explored both opportunities and limitations related to the use of fish sludge from Andfjord Salmon as a CO2-reducing component in products like growth media, soil improvers and fertiliser products for agriculture, gardening and other relevant areas of application.
In the context of the research, fish sludge means fish faeces and leftover fish feed that sinks to the bottom of the land-based farming facility at Andøya, which in turn is collected by cleaning robots.
“Put plainly, we can make money from the salmon’s faeces,” said Martin Rasmussen, CEO at Andfjord Salmon. “To treat biological waste as a sustainable resource rather than a problem has been a key objective for us. The NIBIO report confirms that this is possible, taking us one step closer to building the world’s most sustainable and fish-friendly aquaculture facility.”
Valuable faecal properties
The NIBIO report concludes that dried fish sludge from Andfjord Salmon’s land-based farming facility has the properties required to satisfy the treatment requirements set in current regulations. This will still be valid after the expected upcoming revision of Norway’s fertiliser regulations.
Andfjord Salmon’s sustainable flow through land-based facility for Atlantic salmon farming is escape-proof, lice-free and its cleaning system avoids polluting marine life. The facility will be partly powered by solar panels and wind turbines.