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Quantifying nutrient recovery by element flow analysis: Harvest and use of seven marine biomasses to close N and P loops
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering.ORCID iD: 0000-0002-2459-0311
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Water and Environmental Engineering.ORCID iD: 0000-0002-0354-7189
IVL Svenska Miljoinst, IVL Swedish Environm Res Inst, Kristineberg 566, S-45178 Fiskebackskil, Sweden..
Anthesis Enveco AB, Barnhusgatan 4, SE-11123 Stockholm, Sweden.;Holmboe & Skarp AB, Norr Kallstavagen 9, SE-14896 Sorunda, Sweden..
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2022 (English)In: Resources, Conservation and Recycling, ISSN 0921-3449, E-ISSN 1879-0658, Vol. 178, article id 106031Article in journal (Refereed) Published
Abstract [en]

Anthropogenic consumption of nitrogen (N) and phosphorus (P) has pushed their respective planetary boundaries beyond a safe operating space causing environmental problems, and simultaneously, the depletion of finite mineral P resources is of growing concern. Previous research has found that marine biomass such as kelp, reed and mussels have a high potential for taking up N and P, which could potentially contribute both to alleviating environmental problems and recirculating P from marine environments back to human consumption systems. This paper thus examines these nutrient flows and the extent to which marine biomass can contribute to close the loop. The study utilizes an element flow analysis (EFA) to establish the mapping of N and P flows and explore plausible scenarios of biomass utilisation by 2030 and 2050 for P loop closure in Sweden. The current uptake of P and N through the seven marine biomass cases (mariculture of mussels on both the Swedish east and west coasts, kelp and ascidians and the harvest of wild oysters, beach-cast and reed) contributes to 1.1% and 0.3% respectively of the full loop closure (relative to 2016 loading). Approximately 22% of the total P (and 23% N) uptake (in the biomasses) is currently being used in products, while the rest remains unused. The plausible future scenario for 2050 expects to contribute to around 10% P and 2.8% N loop closure (relative to 2016) if all nutrients in the uptake are used.

Place, publisher, year, edition, pages
Elsevier BV , 2022. Vol. 178, article id 106031
Keywords [en]
Element flow analysis, Blue growth, Circular economy, Nutrient recovery, Phosphorus, Nitrogen
National Category
Ecology Environmental Sciences
Identifiers
URN: urn:nbn:se:kth:diva-310589DOI: 10.1016/j.resconrec.2021.106031ISI: 000767524900013Scopus ID: 2-s2.0-85119441368OAI: oai:DiVA.org:kth-310589DiVA, id: diva2:1649893
Note

QC 20220405

Available from: 2022-04-05 Created: 2022-04-05 Last updated: 2022-06-25Bibliographically approved

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Sinha, RajibThomas, Jean-BaptisteGröndahl, FredrikHasselström, Linus

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