One of the major problems with the generalised use of microalgae as a feedstock for biofuels resides in the energy consumption
associated with biomass culturing and harvesting/dewatering with
consequently prohibitive costs, so far [15,16]. These costs are
mainly related to technology constrains which are expected to be
overcome in a near future [9], such as the use of LEDs as light
source for microalgae culture in photobioreactors or the use of
solar ovens and wind tunnels for biomass dewatering [17]. Being
low energy consuming and based on renewable energy sources,
these possibilities confer a sustainability gain to the whole process
of producing microalgae biomass for bioconversion purposes.