SciTransfer
SAFE · Project

Circular Waste-to-Feed Systems for Sustainable Freshwater Fish Farming

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Imagine a fish farm that works like a forest, where nothing goes to waste. Instead of throwing away dirty water and sludge, this system turns that 'trash' into food for mushrooms, insects, and algae. It uses smart AI to feed fish more precisely, cutting down on waste and keeping the water clean.

By the numbers
16
Total deliverables
7
SMEs in consortium
44%
Industry ratio
The business problem

What needed solving

Freshwater aquaculture faces high environmental footprints and poor economic viability due to waste management costs and expensive feed. Current systems often struggle with sludge disposal and inefficient water use.

The solution

What was built

An industrial-scale CO2 heat pump sludge dryer and a low-cost straw-brick sediment filtration system. AI-driven tools for automated feeding and water management were also developed.

Audience

Who needs this

Freshwater fish farm operatorsAquaculture equipment manufacturersAlternative protein startupsSustainable feed producers
Business applications

Who can put this to work

Aquaculture Technology
mid-size
Target: RAS (Recirculating Aquaculture System) equipment manufacturers

If you are an equipment manufacturer dealing with high energy costs for waste management — this project developed a transcritical CO2 heat pump dryer that reduces power consumption and eliminates cooling water needs. This allows for more efficient sludge processing at industrial scales.

Animal Feed Production
SME
Target: Alternative protein producers

If you are a feed producer dealing with expensive raw materials — this project developed methods to convert fish sludge and effluents into substrates for insects, worms, and fungi. This creates a new, low-cost source of bioactive feed ingredients.

Precision Farming
SME
Target: Agri-tech software developers

If you are a software provider dealing with inefficient fish feeding and water quality drops — this project developed AI and machine learning tools to optimize grading and feeding. This reduces waste production and improves fish welfare through automation.

Frequently asked

Quick answers

What is the cost of implementing these systems?

Based on available project data, specific pricing for the systems is not provided, though the project emphasizes reducing power consumption and using low-cost materials like straw bricks.

Has this been tested at an industrial scale?

Yes, the project includes the installation of an industrial scale Waister dryer for fish sludge at a freshwater aquaculture site.

How is the IP or licensing handled for the AI tools?

Based on available project data, the specific licensing terms for the AI and machine learning tools are not disclosed.

What regulations does this address?

The project focuses on improving environmental performance and documenting governance conditions required for the wider uptake of circular economy practices in EU aquaculture.

When will these technologies be available for commercial use?

The project period runs until 2026-10-31, suggesting that final validations and transferability documentation are ongoing.

Consortium

Who built it

The consortium is heavily geared toward commercial application, with a 44% industry ratio including 7 SMEs. With 16 partners across 11 countries, the project combines academic research (4 universities, 3 research centers) with practical industrial implementation, ensuring that the developed AI tools and drying hardware are grounded in real-world operational needs.

How to reach the team

Contact the International Organisation for the Development of Fisheries and Aquaculture in Europe (DK)

Next steps

Talk to the team behind this work.

Contact us to find the specific SME partner providing the CO2 heat pump technology.

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