Indian Journal of Science and Technology
Year: 2018, Volume: 11, Issue: 7, Pages: 1-18
P. A. Sanguino-Barajas1, A. F. Barajas-Solano1 *, N. A. Urbina-Suarez1 , A. D. Gonzalez-Delgado2 and C. Barajas-Ferreira3
1 Departamento de Ciencias del Medio Ambiente, Universidad Francisco de Paula Santander UFPS, Cucuta, Colombia; [email protected], [email protected], [email protected]
2 Department of Chemical Engineering, University of Cartagena, Cartagena, Bolivar, Colombia; [email protected]
3 Department of Chemical Engineering, Industrial University of Santander, Bucaramanga, Colombia; [email protected]
*Author for correspondence
A. F. Barajas-Solano,
Departamento de Ciencias del Medio Ambiente, Universidad Francisco de Paula Santander UFPS, Cucuta, Colombia; [email protected], [email protected], [email protected]
Background: The production of biofuel and high value products from microalgae exhibits difficulties that have been widely studied to develop viable, efficient and economic methods for recovering metabolites. Objectives: This work is focused on evaluating experimental methods to obtain carbohydrates, proteins and lipids by varying process variables (solvent concentration, temperature, biomass/solvent ratio and moisture content). Methods/Analysis: Carbohydrate and proteins were extracted by acid and alkaline hydrolysis to study the effect of biomass moisture on recovery of these metabolites. Lipids were obtained using hexane and methanol-chloroform methods and its quantification was performed by gravimetric analysis. Findings: It was found that 41.96% and 49.77% of carbohydrates were recovered from C. vulgaris using biomass without thermal pretreatment by acid and alkaline hydrolysis, respectively. Regarding to lipid extraction, hexane was used as solvent for recovering 18.22% of lipids from C. vulgaris. In addition, results suggested that dehydrating biomass at 105°C reduces recovery of high value products. Novelty/Improvement: This study proposes a selective method for extracting metabolites, which enhances efficiency of recovery when is carried out under suitable conditions of biomass moisture, time and solvent volume.
Keywords: Carbohydrates, Flocculation, Lipids, Microalgae, Proteins
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