The feedstock properties for each extracted raw material are
shown inTable 6. Samples derived from wastewater irrigated cultivations were found to contain lower concentrations of free fatty
acids, compared to samples derived from freshwater-irrigated
cultivations. The difference in acidity makes wastewater irrigated
cultivation favorable to biodiesel production as it simplifies the
transformation process. However, in some olive oil it some researchers note that there is no significant differences in the FFA
content of the oils from the compared treatments (wastewater and
freshwater)[19].In addition to this, wastewater irrigation has a slight positive
effect on viscosity, as samples derived from those cultivations have
lower values