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Microalgae Cultivation for the Biotransformation of Birch Wood Hydrolysate and Dairy Effluent
Swedish University of Agricultural Sciences, Umeå.
Swedish University of Agricultural Sciences, Umeå.
Umeå University, Umeå.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0002-3687-6173
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2019 (English)In: Catalysts, ISSN 2073-4344, Vol. 9, no 2, article id 150Article in journal (Refereed) Published
Abstract [en]

In order to investigate environmentally sustainable sources of organic carbon and nutrients, four Nordic green microalgal strains, Chlorella sorokiniana, Chlorella saccharophila, Chlorella vulgaris, and Coelastrella sp., were grown on a wood (Silver birch, Betula pendula) hydrolysate and dairy effluent mixture. The biomass and lipid production were analysed under mixotrophic, as well as two-stage mixotrophic/heterotrophic regimes. Of all of the species, Coelastrella sp. produced the most total lipids per dry weight (~40%) in the mixture of birch hydrolysate and dairy effluent without requiring nutrient (nitrogen, phosphorus, and potassium-NPK) supplementation. Overall, in the absence of NPK, the two-stage mixotrophic/heterotrophic cultivation enhanced the lipid concentration, but reduced the amount of biomass. Culturing microalgae in integrated waste streams under mixotrophic growth regimes is a promising approach for sustainable biofuel production, especially in regions with large seasonal variation in daylight, like northern Sweden. To the best of our knowledge, this is the first report of using a mixture of wood hydrolysate and dairy effluent for the growth and lipid production of microalgae in the literature.

Place, publisher, year, edition, pages
MDPI, 2019. Vol. 9, no 2, article id 150
Keywords [en]
Birch hydrolysate, Chlorella, Coelastrella, Dairy wastewater, Fatty acid methyl esters, Green algae, Heterotrophic, Lipids, Mixotrophic
National Category
Bioprocess Technology
Research subject
Biochemical Process Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-73233DOI: 10.3390/catal9020150ISI: 000460702200044Scopus ID: 2-s2.0-85062564536OAI: oai:DiVA.org:ltu-73233DiVA, id: diva2:1296992
Note

Validerad;2019;Nivå 2;2019-03-18 (svasva)

Available from: 2019-03-18 Created: 2019-03-18 Last updated: 2019-04-12Bibliographically approved

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Matsakas, LeonidasRova, Ulrika

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