BIOCHEMICAL RESPONSES OF CHLORELLA VULGARIS AND SCENEDESMUS SP. UNDER NUTRIENT LIMITATION

Increasing microalgae carbohydrate content through nutrient limitation has been regarded as a potential strategy to optimize bioethanol production. This study assessed three different media in which nitrogen, phosphorus and sulfur concentration was decreased by 10-fold with regard the control media. The performance of two robust microalgae, namely Chlorella vulgaris Scenedesmus sp., were evaluated terms growth biochemical composition. At stationary phase, limited supported highest accumulation on respectively (approximately 4-fold). Under these scenarios, biomass did not exhibit arrested while its 10%. decrease attributed photosynthetic that concomitantly affected nutrients uptake. After 15 days cultivation, analysis revealed out total carbohydrates obtained under those (30% DW for 22% Scenedesmus), only 5% starch therefore main fraction contained cell wall. Likewise, profile presented fast changes short periods time importance an appropriate harvesting schedule obtain rich highlighted.