Waste to value: Valorization of sludge from recirculating aquaculture systems

Wanhe Qi
Natural Resources Institute Finland (Luke)

Recirculating aquaculture systems (RAS) play an important role in sustainable fish farming to meet global food demands, but they generate nutrient-rich sludge in large volumes during the production.

This sludge poses environmental risks if discharge untreated yet offers untapped potential as a valuable resource for agriculture. This research project aims to valorize RAS sludge into high-value products for agriculture use, like fertilizers, cultivation substrates, and soil amendments through novel approaches. The research overcomes the key bottlenecks in converting sludge into agriculture use products, such as sludge potassium deficiency and sludge dewatering efficiency. By developing these practical sludge valorization methods, the project addresses the environmental challenge of sludge disposal while creating economic value, supporting a circular economy for sustainable aquaculture and agriculture.

Programme

Find out the research institutes that implement the Programme and where to find open positions.

Progress

Great start for the Programme! The first 36 postdoctoral researchers have been recruited and started their work. Half of them relocated to Finland from abroad.
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