Figure 1From: Chlorella for protein and biofuels: from strain selection to outdoor cultivation in a Green Wall Panel photobioreactorGrowth of four selected Chlorella strains cultivated outdoors in 0.25 m2GWP-II under nitrogen starvation and nutrient sufficiency. Growth, expressed as biomass concentration, of four Chlorella strains in 0.25 m2 GWP-II reactors in F medium. Cultures under nutrient sufficiency are indicated by filled symbols, starved cultures by empty symbols. Daily global solar radiation is indicated by an asterisk. Temperature controlled at 40°C.Back to article page