Halamphora coffeaeformis: a source of lipids for biodiesel and value-added co-products

SCODELARO BILBAO, P; MARTIN, L; POPOVICH, C; SALVADOR, G; LEONARDI, P

Cordoba

Congreso; 52 Reunion Anual de SAIB; 2016

SAIB

Halamphora coffeaeformis: A SOURCE OF LIPIDS FOR BIODIESEL AND VALUE-ADDED CO-PRODUCTSScodelaro Bilbao P12; Martín L2; Popovich C12; Salvador G13; Leonardi P121Dpto. Biología, Bioquímica y Farmacia - UNS, 2CERZOS, 3 INIBIBB. CONICET. Bahía Blanca, Argentina.E-mail: pscodela@criba.edu.arRecent studies have indicated that the sustainable production of biodiesel from microalgae requires the use of a biorefinery approach. In the present work, Halamphora coffeaeformis, a marine benthic diatom native from Bahía Blanca Estuary, was cultured in order to evaluate the simultaneous production of triacylglycerols (TAG) for biodiesel and value-added co-products. For this end, the species was grown in a raceway pond in f/2 medium without the addition of vitamins. Total lipid content was 25.2% (dry weight (dw)) and neutral lipids represented the 86%. Coincidently, TAG content was 17% (dw). Palmitoleic (26%), eicosapentanoic (23.6%) and palmitic (16.9%) fatty acids were the main components of the neutral lipid fraction, suggesting that H. coffeaeformis oil meets biodiesel standards. In addition, phytosterols were present at 0.22% (dw) while proteins represented 18.5% (dw). Finally, as the cell wall of H. coffeaeformis contains mainly silica, its amount was analyzed in the residue obtained after the lipid extraction. Results revealed that H. coffeaeformis contains 25% (dw) of silica. These findings provide baseline information and are the starting point for future scaling-up of this species under a biorefinery approach.