For development of an energetic industry from biomass, at the begining is important to determine the more convenient feedstocks, also, for increasing the system sustainability was adapted the biorefinery concept for selecting economically viable products (biofuels and value-added substances)or with less detriment in profit. In previous work, an analysis of the potentially obtainable products in a biorefinery from microalgae biomass was performed, based on the metabolites composition optimization. From the previous results, is desirable perform sensitivities to evaluate points that influence the profitability of the biorefinery as the cost and consumption of raw material in order to establish a configuration of microalgae strain. Finally, based on bibliographic reviews was selected microalgae strain (Nannochloropsis sp.) for better fit the criteria and a detailed chemical composition is reported.