Aquaculture Europe 2021

October 4 - 7, 2021

Funchal, Madeira

Add To Calendar 07/10/2021 11:20:0007/10/2021 11:40:00Europe/LisbonAquaculture Europe 2021VALORISATION OF EUROPEAN AQUACULTURE SIDE STREAMS AND BY-PRODUCTS – A COST-BENEFIT ANALYSISLisboa-HotelThe European Aquaculture Societyalistair@aquaeas.eufalseanrl65yqlzh3g1q0dme13067DD/MM/YYYY


Kreiss, C.M.1, Edebohls, I.2*., Brüning, S. 2, Bruckner, C. 3, Vázquez, J.A. 4, Baarset, H. 5, Micallef, G. 6


1Thuenen Institute of Fisheries Ecology, Herwigstr. 31, 27572 Bremerhaven, Germany                                                        Email:

2Thuenen Institute of Sea Fisheries, Herwigstr. 31, 27572 Bremerhaven, Germany    

3Salten Havsbrukpark, 8120 Nygårdsjøen, Norway

4Instituto de Investigaciones Marinas - Spanish National Research Council (IIM-CSIC), 36208 Vigo, Spain                                              

5Waister AS, 3170 Sem, Norway

6Gildeskål Research Station AS (GIFAS), 8140 Inndyr, Norway



 Against the background of the stagnating  EU  aquaculture sector growth  in contrast to the increasing sector size at world level (including Norway) , it is important to address prevailing hindering factors such as import pressure or social pressure due to actual and perceived environmental impacts.  Within the H2020 project Green Aquaculture Intensification (GAIN) innovative production tools based on the principles of circular economy were developed and evaluated in order to facilitate the paradigm shift of eco-intensification in European aquaculture. While the valorisation of side-stream products is beneficial for a more sustainable production, related changes in production practices, may impact capital investment, labour input or energy demand, all of which affect costs. We applied an established benchmarking approach to contrast today’s economic performance of “typical farms” using the conventional ensilage  method with their profitability when processing mortalities within a drying unit. Further, in-depth cost-benefit analyses were conducted for a theoretical decoupled algae aquaponics system ( Ulva lactuca) utilizing disposal water from smolt RAS production; as well as  an input-output based economic analysis for the valorisation of  aquaculture  fish by-products (FBP) on industry scale. The results reveal a promising economic balance  for various market opportunities such as selling dried mortalities to the pet food sector or  Ulva lactuca to the Asian market with the side-effect of reducing the nutrient load of European smolt waste water and potentially increasing smolt production. Processing  various FBP into  secondary products  also proved to be promising approaches for fish protein hydrolysate, peptones and their further use as medium e.g. for lactic acid bacteria . The profitability of the examined pathways were based on accessible market prices. F urther key aspects  for future marketing success will also include market access and consumer demand.