Morphologycal response and multiparameter comparison of microalgae oil extraction alternatives for obtaining biodiesel and co-products./Respuesta morfológica y comparación multiparámetro de alternativas de extracción de aceite de microalgas

Ángel Darío González Delgado


DOI: http://dx.doi.org/10.15665/rp.v11i1.23

Resumen


Microalgae biomass emerges as an energy crop of great interest worldwide owing to its potential for obtaining biofuels and high value products and for the development of biorefinery processes owing to their varied composition and high biomass productivities per area unit. Several alternatives of microalgal metabolites extraction and transformation are being studied for the development of novel technologies for biomass using. Microalgae oil extraction is particularly important because is a key stage in microalgal biodiesel production chains and their efficiency contributes significantly to global process efficiency. In this study, a comparison of five oil extraction methods in lab-scale, taking into account extraction efficiency, energy consumption, costs of extraction and toxicity was made using five national bioprospecting microalgae strains. Methods evaluated were Solvent extraction with high speed homogenization (SHE), Continuous efflux solvent extraction (SCE), Hexane based extraction (HBE), Cyclohexane based extraction (CBE) and Ethanol-hexane extraction (EHE), microalgae strains used were Closterium sp., Amphiprora sp., Navicula sp., Nannochloropsis sp., and Guinardia sp., morphologycal response of strains to oil extraction methods was also evaluated using optic microscopy. Results shows that although there is not an unique oil extraction method with the best performance in all evaluated criteria, SCE, SHE and HBE methods presents high oil yields, while HBE method is the more convenient in global terms for use in lab scale and appears as an emerging technology for microalgae oil extraction in large scale.


Palabras clave


Microalgas; Extracción; Eficiencia;Costos;Requerimientos energéticos; Toxicidad;

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Referencias


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