Bicarbonate supplementation improves biomass productivity in Scenedesmus obliquus cultivation

Autor(es)

Matsudo, M. C. ; Fukui-de-Sousa, T. ; Carvalho, J. C. M.

• Tipo de documento: Artigo Científico
• Fonte: RESEARCH JOURNAL OF BIOTECHNOLOGY; v. 15, n. 7, p. 6-pg., 2020-07-01.

Resumo

Several studies have focused on the use of CO2 from alcoholic fermentation as carbon source in the cultivation of microalgae. However, considering the quantity of bioethanol produced in Brazil, for example, only part of this gas could be effectively used. In this sense, this inorganic carbon could be stored in the form of sodium bicarbonate and carbonate which can be used for supplementing microalgae growth medium. In the present study, the green microalga Scenedesmus obliquus was cultivated in Erlenmeyer flasks and in bench-scale tubular photobioreactor with the addition of sodium bicarbonate (0.2 similar to 6.4 g.L-1). The supplementation of this inorganic carbon source allowed increasing biomass concentration in Erlenmeyer flasks. In tubular photobioreactor with better conditions for microalgal growth, this supplementation did not allow the increase in maximum biomass concentration, but permitted the growth in shorter time, increasing biomass productivity. Lipid content was not influenced ranging from 26.3 to 30.2 % and the fatty acids showed a satisfactory polyunsaturated fatty acids/saturated fatty acids ratio (PUFA/SFA= 1.0 similar to 1.1) (AU)

• Processo FAPESP: 10/51503-4 - Avaliação do potencial de diferentes microalgas para produção de lipídios de interesse na indústria de alimentos, farmacêutica e de cosméticos
• Beneficiário: João Carlos Monteiro de Carvalho
• Modalidade de apoio: Auxílio à Pesquisa - Regular