Comparative life cycle assessment of marine microalgae, <i>Nannochloropsis</i> sp. and fishmeal for sustainable protein ingredients in aquaculture feeds
نویسندگان
چکیده
Fishmeal from small marine pelagic fishes reduces their availability for wildlife forage and artisanal fishing catches that support food security in lower income coastal nations. is primarily used feeds aquaculture, the world’s fastest-growing sector. Replacing fishmeal aquafeeds with more environmentally responsible alternative ingredients can help feed aquaculture transition to sustainable production methods. Protein defatted microalga, Nannochloropsis sp., produced alongside polyunsaturated fatty acids (PUFAs) nutraceutical market lacks a comprehensive open-access analysis of environmental impacts producing these products biorefineries. This study compared life cycle (global warming potential, water use, land eutrophication freshwater biotic resource use) protein fish biorefinery meal. We conducted an attributional assessment using primary data provided by Cellana LLC model biomass cultivation harvesting at Kona Demonstration Facility (Hawaii, USA) literature downstream processing into high-protein replacement aquafeed concentrated PUFAs market. Material energy inputs included 2 scenarios (wet dry biomass) oil extraction (i.e., fractionation concentration PUFAs): solvents or supercritical carbon dioxide. Results were processes had largest overall effect all scenarios; urea pure liquid dioxide hot spots; scenario involving followed solvent significantly than global but not use. These results suggest microalgae be if high-value metabolites are coproduced biorefinery.
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ژورنال
عنوان ژورنال: Elementa
سال: 2023
ISSN: ['2325-1026']
DOI: https://doi.org/10.1525/elementa.2022.00083