THE GROWTH AND LIPID EXTRACTION FROM FRESH WATER MICROALGAE - SCENEDESMUS QUADRICAUDA

Recently, microalgae becomes a promising feedstock for biofuel, specially for
biodiesel, due to their fast growing and high lipid content. The present study was
conducted in order to investigate the effect of different culture mediums, air injection
rates, nitrogen concentrations, and CO2 concentrations by using a flat plate and a
column photobioreactor on growth rate, cell biomass concentration, and composition
of cell biomass of Scenedesmus quadricauda. The result about the effect of different
medium shows that, from column photobioreactor, BG-11 medium resulted in higher
growth rate, cell biomass concentration and lipid content than Lefebvre-Czarda
medium. The result about the effect of air injection rate shows that, at low air
injection rate range, from both the photobioreactors, growth rate and cell biomass
concentration were enhanced significantly by the increase of air injection rate.