Microalgae Cultivation for the Biotransformation of Birch Wood Hydrolysate and Dairy Effluent

Catalysts

Leonidas Matsakas¹  Ulrika Rova¹  Christiane Funk²  Lorenza Ferro²  FrancescoG. Gentili³  Sandra Lage³  NirupaP. Kudahettige⁴ 

[1] Biochemical Process Engineering, Division of Chemical Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, 97187 Luleå, Sweden;Department of Chemistry, Umeå University, 90187 Umeå, Sweden;Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences, 90183 Umeå, Sweden;Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences, 90183 Umeå, Sweden;

关键词: mixotrophic;    heterotrophic;    lipids;    fatty acid methyl esters;    dairy wastewater;    birch hydrolysate;    green algae;    Coelastrella;    Chlorella;   

DOI  :  10.3390/catal9020150

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown