2026-06-06T04:58:57Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/249792026-02-03T11:23:23Zcom_10630_2254col_10630_37953

00925njm 22002777a 4500 dc Morillas-España, Ainoa author Bermejo, Ruperto author Abdala-Díaz, Roberto Teófilo author Ruiz, Ángela author Lafarga, Tomás author Acién-Fernández, Francisco Gabriel author Fernández-Sevilla, José María author 2022-08-22 In this study, a biorefinery based on Oscillatoria sp. is developed to produce high-value compounds such as C-phycocyanin, used in food colourant applications, and biostimulants, used in agriculture-related applications. First, the Oscillatoria biomass production was optimized at a pilot scale in an open raceway reactor, with biomass productivities equivalent to 52 t/ha·year being achieved using regular fertilizers as the nutrient source. The biomass produced contained 0.5% C-phycocyanins, 95% of which were obtained after freeze–thawing and extraction at pH 6.5 and ionic strength (FI) 100 mM, with a purity ratio of 0.71 achieved in the final extract. This purity ratio allows for use of the extract directly as a food colourant. Then, the extract’s colourant capacity on different beverages was evaluated. The results confirm that C-phycocyanin concentrations ranging from 22 to 106 mg/L produce colours similar to commercial products, thus avoiding the need for synthetic colourants. The colour remained stable for up to 12 days. Moreover, the safety of the extracted C-phycocyanin was confirmed through toxicity tests. The waste biomass was evaluated for use as a biostimulant, with the results confirming a relevant auxin-like positive effect. Finally, an economic analysis was conducted to evaluate different scenarios. The results confirm that the production of both C-phycocyanin and biostimulants is the best scenario from an economic standpoint. Therefore, the developed biomass processing scheme provides an opportunity to expand the range of commercial applications for microalgae-related processes. Morillas-España A, Bermejo R, Abdala-Díaz R, Ruiz Á, Lafarga T, Acién G, Fernández-Sevilla JM. Biorefinery Approach Applied to the Production of Food Colourants and Biostimulants from Oscillatoria sp. Biology. 2022; 11(9):1278. https://doi.org/10.3390/biology11091278 https://hdl.handle.net/10630/24979 https://doi.org/10.3390/biology11091278 Microalgas Biorefinery Approach Applied to the Production of Food Colourants and Biostimulants from Oscillatoria sp