Hybrid two-stage culture of Halamphora coffeaeformis for biodiesel production: Growth phases, nutritional stages and biorefinery approach

POPOVICH, CECILIA A.; MARTÍN, LUCAS A.; DAMIANI, MARÍA C.; SCODELARO BILBAO, PAOLA G.; POPOVICH, CECILIA A.; MARTÍN, LUCAS A.; DAMIANI, MARÍA C.; SCODELARO BILBAO, PAOLA G.; MARTÍNEZ, ANA M.; LEONARDI, PATRICIA I.; MARTÍNEZ, ANA M.; LEONARDI, PATRICIA I.

RENEWABLE ENERGY

PERGAMON-ELSEVIER SCIENCE LTD

Año: 2018 p. 984 - 992

0960-1481

The growth, lipid accumulation and bioproducts of the marine diatom Halamphora coffeaeformis wereevaluated in a hybrid two-stage culture using seawater enriched with nutrients and without vitamins.The influence of dissolved and internal nutrients on growth and lipid accumulation was also analyzed.Total lipid content increased in the declining phase up to 33.4% ash-free dry weight, due to an increase inneutral lipids, which reached 87% of total lipids. The observed delay in triacylglycerol (TAG) accumulationcould be explained by the accumulation of large internal pools of nitrogen in H. coffeaeformis. TAG,frustules (silica-containing cell wall) and soluble exopolysaccharides are analyzed and proposed asbioproducts of commercial interest. A biorefinery approach for the economic and environmentallysustainable production of biodiesel from the hybrid two-stage culture of H. coffeaeformis is suggested.