Aqua Plant Systems | Aquaculture nutrient recycling

Overfishing of the oceans and in freshwater fishing grounds led in recent decades to a global rethinking and conclusively to an increasing number of land-based aquaculture facilities. However, these need fish feed in large quantities and good quality. This results in a huge environmental burden to the environment due to their  high amounts of inorganic wastewater emissions. Therefore, it is necessary for this industry to find intelligent solutions to reduce costs and ensure sustainability.

Together with our partner, the fish farm Christophersen in Bornhöved, we combine fish aquaculture with microalgae production to close the biogeochemical carbon, nitrogen, and phosphate cycle as far as possible. Within this project, we still feed fish with conventional feed but with the longterm goal to substitute this food by algae feed. The solid fish wastes are used as starting material for further needs. Similar to higher plants, algae need sunlight, water, carbon dioxide, and inorganic nutrients for a sufficient growth. Inorganic wastes from the fish farm effluent can be used as a valuable substrate for the cultivation of algae.

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  • Financed by the European Union, European Regional Development Fund (ERDF), The Federal Republic of Germany and the Land of Schleswig Holstein