… In third-generation algae biodiesels, the oil extraction process plays a beneficial role in which the solid form of dried algae powder/flakes is transferred into a liquid (algae oil) form known as the extraction process (Topare et al., 2011).
Why is oil extraction from wet microalgae important?
In this direction, it is convenient to remark that the study of oil extraction from wet microalgae is fundamental because the presence of water acts as a barrier between the solvent and the intracellular oil, but the dry step also implies additional costs and energy consumption ( Park et al., 2020 ).
Can microalgae be extracted from wet biomass?
In the case of microalgae, the solvent is generally added to dry biomass, although the utilization of wet biomass can decrease the overall cost of the process because it is an energy-saving extraction procedure with the disadvantage that usually affects the separation process causing a low extraction efficiency ( Xu et al., 2021 ).
How is algal biomass extracted?
Extraction of algal biomass consists of the following steps: pretreatment, extraction, formulation. Since algal biomass does notcontainlignin,butcellulose,extractionofbiologicallyactive compounds is facilitated . Nevertheless, high content of cell wall polysaccharides complicates the extraction of metabolites from algae .