Recirculating Aquaculture Is Possible without Major Energy Tradeoff: Life Cycle Assessment of Warmwater Fish Farming in Sweden
| Autor: | Malin Jonell, Kristina Bergman, Louisa Borthwick, Max Troell, Friederike Ziegler, Sara Hornborg, Patrik J. G. Henriksson, Gaspard Philis |
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| Rok vydání: | 2020 |
| Předmět: |
Sweden
Life Cycle Stages Land use business.industry Fish farming Fisheries Climate change Aquaculture General Chemistry 010501 environmental sciences Animal Feed 01 natural sciences Article Environmental protection Animals Environmental Chemistry Environmental science Environmental impact assessment Water quality business Eutrophication Life-cycle assessment 0105 earth and related environmental sciences |
| Zdroj: | Environmental Science & Technology |
| ISSN: | 1520-5851 0013-936X |
| DOI: | 10.1021/acs.est.0c01100 |
| Popis: | Seafood is seen as promising for more sustainable diets. The increasing production in land-based closed Recirculating Aquaculture Systems (RASs) has overcome many local environmental challenges with traditional open net-pen systems such as eutrophication. The energy needed to maintain suitable water quality, with associated emissions, has however been seen as challenging from a global perspective. This study uses Life Cycle Assessment (LCA) to investigate the environmental performance and improvement potentials of a commercial RAS farm of tilapia and Clarias in Sweden. The environmental impact categories and indicators considered were freshwater eutrophication, climate change, energy demand, land use, and dependency on animal-source feed inputs per kg of fillet. We found that feed production contributed most to all environmental impacts (between 67 and 98%) except for energy demand for tilapia, contradicting previous findings that farm-level energy use is a driver of environmental pressures. The main improvement potentials include improved by-product utilization and use of a larger proportion of plant-based feed ingredients. Together with further smaller improvement potential identified, this suggests that RASs may play a more important role in a future, environmentally sustainable food system. |
| Databáze: | OpenAIRE |
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