THE CHALLENGES OF BIODIESEL PRODUCTION FROM OSCILLATORIA SP.

Abstract

Microalgae are the most promising sources for biodiesel. At constant light and temperature, four different Oscillatoria sp. were cultured in sterilized BG-11 medium for a long period. Nitrate concentration was measured each couple of days to conclude that oscillatoria sp. did not suffer from nitrogen starvation for short culture periods. Then Osci.2 chosen for its highest dry cell weight; 450, 534, 1140, 2843, 2519 mg 100ml -1 in days 3, 7, 22, 36 and 39, respectively. Osci.2 cultivated for 21 days in BG-11 medium with different nitrate concentrations;(1500, 375, 186, 94, 47, 23 and 0.0 mgl -1 NaNO 3 . Biomass productivity (mgl -1 d -1), DCW (mgl -1) and target fatty acids percent (%TFAs; (C14:0, C16:0, C18:0, C16:1, C18:1, C18:2, C18:3) for biodiesel production detected per seven - da s cultures . With different nitrogen concentrations , Oscillatoria sp . produced diverse of fatty acid patterns . BecauseofthemaintargetsforbiodieselproductionarebothbiomassandTFAs,375mgl-1NaNO3isthesuitablenitrateconcentrationtocultivateOscillatoriafor21daysforbiodieselproduction.CopyRight,IJAR,2017,.Allrightsreserved.