Artículo
Bioconversion of commercial and crude glycerol to single-cell oils by the Antarctic yeast Rhodotorula glutinis R4 as a biodiesel feedstock
Angelicola, María Virginia
; Fernandez, Pablo Marcelo
; Aybar, Manuel Javier
; Van Nieuwenhove, Carina Paola
; Castellanos, Lucia Ines
; Viñarta, Silvana Carolina
Fecha de publicación:
01/2023
Editorial:
Elsevier
Revista:
Biocatalysis and Agricultural Biotechnology
ISSN:
1878-8181
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Ability of the oleaginous yeast Rhodotorula glutinis R4 to produce single-cell oils (SCO) using different concentrations (25–100 g L−1) of commercial and crude glycerol as substrate was evaluated. R. glutinis R4 reached 44–57% and 41–52% (w/w) of lipid accumulation when grown with 25–100 g L−1of crude and commercial glycerol, respectively. R4 grown with 35 and 50 g L−1 of crude glycerol reached a lipid accumulation of 44–45% (w/w) at 120 h corresponding to 6 g L−1 of lipid concentration, with a yield YL/S ∼ 0.45 g g−1, lipid productivity (QL) of 0.05 g L−1h−1, and a glycerol consumption of 31 and 37.2 g L−1, respectively. Regarding the volumetric productivities at the different concentrations, the QL (0.05 g L−1 h−1) and QX (0.11 g L−1 h−1), did not differ statistically from the control (glucose). Lipid accumulation was higher at 216 h of culture using 100 g L−1 of glycerol (51 and 57% for commercial and crude, respectively), but a significant decrease of QL (from 0.05 to 0.03 g L−1 h−1) and Qx (0.11 to 0.09 g L−1 h−1) was observed. A negative effect on yield, Qx and QL was observed at glycerol concentrations above 50 g L−1. R4 SCO showed a fatty acid profiles rich in oleic acid and suitable for biodiesel production, and were efficiently transformed into biodiesel with yields above 90% by acid transesterification. Biodiesels derived from R4 using crude glycerol are fully complies with international biodiesel standards. This allows advance in a process of circular economy for biodiesel industry.
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Articulos(CERELA)
Articulos de CENTRO DE REFERENCIA PARA LACTOBACILOS (I)
Articulos de CENTRO DE REFERENCIA PARA LACTOBACILOS (I)
Citación
Angelicola, María Virginia; Fernandez, Pablo Marcelo; Aybar, Manuel Javier; Van Nieuwenhove, Carina Paola; Castellanos, Lucia Ines; et al.; Bioconversion of commercial and crude glycerol to single-cell oils by the Antarctic yeast Rhodotorula glutinis R4 as a biodiesel feedstock; Elsevier; Biocatalysis and Agricultural Biotechnology; 47; 1-2023; 1-15
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