ABSTRACT
The renewable bioethanol fuel used at present originated from agricultural and forest biomass. An alternate possibility was brought to study, and refers to the use of algae biomass as a source of sugars or fat materials to the biorefinery purpose. Biomass is rich in fat materials and/or carbohydrates, which can be converted into liquid biofuels. It is expected that the electric automotive substitution along the century, however conventional, will last for a long time. M. Daroch et al. collected some work of bioethanol production by pretreatment and fermentation of micro and macroalgae biomass, reporting yields in ethanol in the range of 0.47 to 40.0% yield. The macroalgal biomass usually requires drying to some extent and grinding. After these physical operations, mainly two processes are used: a preliminary sacharification of macroalgae biomass involving or no several pretreatments, after which the fermentation is made.
