Cultivo fototrófico, mixotrófico e heterotrófico de microalgas em esgoto doméstico visando a produção de biodiesel.

Abstract

Improvement of technologies in the cultivation of microalgae using domestic wastewater implies the reduction of the costs involved in the decontamination of the polluted waters by these effluents, as well as generating inputs for obtaining clean energy sources. The biodiesel production from microalgae has the main advantages: (i) not competing for arable land, (ii) not needing pesticides and excessive water consumption, and (iii) presenting high growth rates and high lipid biomass intracellular. Thus, the present research promoted the cultivation of microalgae D. subspicatus in domestic wastewater under different energy metabolism, in order to optimize growth rates, concentrations of cells in culture, and therefore, identify the crop conditions that promotes better intracellular lipid production, making biofuel production from microalgae, more economically and environmentally sustainable.