Bakkafrost is set to introduce a treatment system that converts by-products into fertilizer at its recirculating aquaculture system (RAS) facility in Applecross, in Scotland.
The project has received the first Waste Management Licence for a hatchery pyrolysis unit from the Scottish Environmental Protection Agency.
The new system will turn surplus by-products, known as hatchery "sludge," from the wastewater treatment process into biochar, a form of fertilizer and soil enhancer for improving soil structure and water retention.
Initially, the sludge, which is around 97% water, undergoes filtration to reduce the water content to 80%, increasing the dry matter to 20%. The next stage involves drying the sludge at 300 degrees Celsius, producing pellets that are then heated to 700 degrees in a pyrolysis unit without oxygen, transforming the waste into biochar.
"Traditionally, this material was considered waste, but technological advancements now allow us to manage it sustainably, which is great news for the environment," said Ian Lannister, managing director of Bakkafrost Scotland
The initiative aligns with Bakkafrost Scotland's long-term sustainability goals and its commitment to reducing waste and promoting renewable energy use. The company plans to reduce waste by 90%, cut water consumption by 90%, and transition to 100% sustainable power at its RAS facilities through the use of hydro, solar, and heat recovery systems.
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