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Marine microalgae for outdoor biomass production—A laboratory study simulating seasonal light and temperature for the west coast of Sweden
University of Gothenburg, Sweden.
RISE Research Institutes of Sweden, Material och produktion, Kemi, biomaterial och textil.ORCID-id: 0000-0001-6496-0586
University of Gothenburg, Sweden.
RISE Research Institutes of Sweden, Material och produktion, Kemi, biomaterial och textil.ORCID-id: 0000-0001-6383-8319
Vise andre og tillknytning
2021 (engelsk)Inngår i: Physiologia Plantarum, ISSN 0031-9317, E-ISSN 1399-3054, Vol. 173, nr 2, s. 543-554Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

At Nordic latitudes, year-round outdoor cultivation of microalgae is debatable due to seasonal variations in productivity. Shall the same species/strains be used throughout the year, or shall seasonal-adapted ones be used? To elucidate this, a laboratory study was performed where two out of 167 marine microalgal strains were selected for intended cultivation at the west coast of Sweden. The two local strains belong to Nannochloropsis granulata (Ng) and Skeletonema marinoi (Sm142). They were cultivated in photobioreactors and compared in conditions simulating variations in light and temperature of a year divided into three growth seasons (spring, summer and winter). The strains grew similarly well in summer (and also in spring), but Ng produced more biomass (0.225 vs. 0.066 g DW L−1 day−1) which was more energy rich (25.0 vs. 16.6 MJ kg−1 DW). In winter, Sm142 grew faster and produced more biomass (0.017 vs. 0.007 g DW L−1 day−1), having similar energy to the other seasons. The higher energy of the Ng biomass is attributed to a higher lipid content (40 vs. 16% in summer). The biomass of both strains was richest in proteins (65%) in spring. In all seasons, Sm142 was more effective in removing phosphorus from the cultivation medium (6.58 vs. 4.14 mg L−1 day−1 in summer), whereas Ng was more effective in removing nitrogen only in summer (55.0 vs. 30.8 mg L−1 day−1). Our results suggest that, depending on the purpose, either the same or different local species can be cultivated, and are relevant when designing outdoor studies. © 2021 The Authors. 

sted, utgiver, år, opplag, sider
Blackwell Publishing Ltd , 2021. Vol. 173, nr 2, s. 543-554
HSV kategori
Identifikatorer
URN: urn:nbn:se:ri:diva-53026DOI: 10.1111/ppl.13412Scopus ID: 2-s2.0-85104504824OAI: oai:DiVA.org:ri-53026DiVA, id: diva2:1557369
Merknad

Funding details: CTS 16:437, KF 17:19; Funding details: Carl Tryggers Stiftelse för Vetenskaplig Forskning; Funding details: Energimyndigheten; Funding text 1: This work was supported by the Swedish Energy Agency and Carl Tryggers Foundation (Cornelia Spetea). Otilia Cheregi was a recipient of a postdoctoral fellowship from the Carl Tryggers Foundation during 2016–2018. We acknowledge Olga Kourtchenko (Department Marine Sciences, University of Gothenburg) for providing the strains from the GUMACC collection as well as feedback to the manuscript. We thank Mathias Berglund at RISE for the elementary content and calorific value determination. We are grateful to the reviewers for their constructive suggestions.; Funding text 2: Carl Tryggers Foundation for Scientific Research, Grant/Award Numbers: CTS 16:437, KF 17:19; Swedish Energy Council, Grant/Award Number: P45907‐1 

Tilgjengelig fra: 2021-05-25 Laget: 2021-05-25 Sist oppdatert: 2022-07-12bibliografisk kontrollert

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