CERZOS   05458
CENTRO DE RECURSOS NATURALES RENOVABLES DE LA ZONA SEMIARIDA
Unidad Ejecutora - UE
artículos
Título:
Lipid quality of Skeletonema costatum and Navicula gregaria from South Atlantic Coast (Argentina): evaluation of its suitability as biodiesel feedstock
Autor/es:
POPOVICH C. A.; DAMIANI, M. C; CONSTENLA, D.; LEONARDI, P. I.
Revista:
JOURNAL OF APPLIED PHYCOLOGY
Editorial:
SPRINGER
Referencias:
Año: 2012 vol. 24 p. 1 - 10
ISSN:
0921-8971
Resumen:
Abstract Since the fatty acid ester profile of a given
biofuel is relatively consistent with the source?s fatty acid
profile, the properties of the biodiesel produced from a
particular feedstock exhibit predictable quality. Thus, lipid
fractions and the fatty acid composition of stationary
growth-phase cultures of the local strains of the diatoms
Skeletonema costatum and Navicula gregaria were analysed
to evaluate their suitability as biodiesel feedstock.
Total lipid content was 20.83 pg cell−1 in S. costatum and
19.17 pg cell−1 in N. gregaria. Neutral lipids were the main
fraction of total lipids in both species, accounting for ca.
65% and 76%, respectively. S. costatum was predominant
in saturated fatty acids (SFAs; 43.48 %) and monounsaturated
fatty acids (MUFAs; 40.11%), while N. gregaria was
predominant in MUFAs (54.85%), followed by SFAs
(33.42%). In S. costatum, the main fatty acids in neutral
lipid fraction were myristic, palmitic, palmitoleic and oleic
acids, while the main ones in N. gregaria were palmitic and
palmitoleic acids. The oils extracted from these species
presented linolenic acid contents within biodiesel?s quality
specifications. However, in neutral lipid fraction both
species showed eicosapentaenoic acid levels higher than
the required limit. The lipid quality analysed in both species
suggests that a biodiesel derived from these oils may
present an acceptable cetane number, but likely poor coldflow
properties. This baseline information is useful for
future research tending to find more suitable conditions in
order to improve oil yield. In addition, both estuarine
species neither compete with agriculture for food nor
require farmland nor fresh water.