Perfil de ácidos graxos de microalgas cultivadas com dióxido de carbono

Abstract

RESUMOAs microalgas são consideradas fontes potenciais de diversos compostos químicos. Os ácidos graxos obtidos da biomassa podem apresentar efeitos terapêuticos em humanos e podem ser usados para produção de biodiesel. Objetivou-se, neste trabalho verificar o conteúdo lipídico e o perfil dos ácidos graxos das microalgas Spirulina sp., Scenedesmus obliquus, Chlorella kessleri e Chlorella vulgaris cultivadas em diferentes concentrações de dióxido de carbono e bicarbonato de sódio. A microalga Chlorella kessleri cultivada com 12% de CO 2 apresentou a maior concentração de lipídios na biomassa seca (9,7% p/p). A máxima concentração de ácidos graxos insaturados foi 72,0% (p/p) para C. vulgaris cultivada com 12% de CO 2 . Para os ácidos graxos saturados o maior valor encontrado foi 81,6% (p/p), quando a microalga Spirulina sp. foi cultivada com 18% de CO 2 e 16,8 g.L -1 de bicarbonato de sódio. Termos para indexação:Ácidos graxos, Chlorella, lipídios, Scenedesmus, Spirulina. ABSTRACTMicroalgae have a great potential as a source of several chemical compounds. The fatty acids have shown therapeutic effects and used to produce biodiesel. The aim of this work was to verify the lipid contents and the fatty acids profile of the microalga Spirulina sp., Scenedesmus obliquus, Chlorella kessleri and Chlorella vulgaris cultived in different carbon dioxide and sodium bicarbonate concentrations. The microalgae Chlorella kessleri cultived with 12% CO 2 showed the highest lipid content in the dry biomass (9.7% p/p). The maximum unsaturated fatty acids concentration was 72.0% (p/p) to C. vulgaris in the culture with 12% CO 2 . The highest saturated fatty acids value was 81.6% (p/p) when microalga Spirulina sp. was cultived with 18% CO 2 and 16.8 g.L -1 sodium bicarbonate.

Biomass Production and Ester Synthesis byIn SituTransesterification/Esterification Using the MicroalgaSpirulina platensis

“…Based on the results of the fatty acid profile, the average molar mass of the fatty acids obtained and the average molar mass of the oil were calculated ( Table 3). The values obtained corroborated the data found in the literature [23,30].…”

Liposomes loaded with phenolic extracts of Spirulina LEB-18: Physicochemical characterization and behavior under simulated gastrointestinal conditions

“…Dried Spirulina LEB-18 biomass, lot 2014, was obtained as described by Morais and Costa (2008). The production was carried out in a pilot plant located on the shores of Lagoa Mangueira (Santa Vitória do Palmar, RS, Brazil).…”

Spirulina sp. LEB-18 culture using effluent from the anaerobic digestion

“…These results were higher than those found by Radmann and Costa (2008): 53.51% UFA and 29.37% of PUFA in the biomass of Spirulina sp. LEB-18 grown with CO 2 , SO 2 and NO in tubular photobioreactors connected in series; and by Morais and Costa (2008): 37.50% UFA and 9.60% PUFA, when cultivating microalgae and replacing the standard carbon source (NaHCO 3 ) with 6% (v/v) of CO 2 .…”