Fig. 2
Microalgal growth and biomass productivity in small-scale reactor. a Cultivation in 10 L laboratory circular pond; b cultivation in 30 L outdoor tank PBR in June 2012; and c cultivation in 30 L outdoor tank PBR in July 2012. Time evolution of biomass concentrations and biomass productivities are indicated by line and column, respectively. The areal biomass concentration (C biomass, g m−2) was used in all outdoor experiments