As already pointed out, growth rates, biomass composition, C/N ratios, fertilizer require­ments, and energy content of the algae are correlated parameters and hence should not be set according to independent assumptions. We advocate for the definition of chemical properties of each biochemical compartment of the algae (e. g., carbohydrates, lipids, membrane) in or­der to justify the fertilizer budget, the energy content of the raw algae, and the extraction res­idue. This would hopefully reduce the spread of values for very important parameters such as nutrient requirement, lipid content, or growth rate.