Fig. 4
From: Enhancement of microalgal CO2 fixation in photobioreactors by means of spiral flow vortices
Measurement of biomass, pH, ratio of variable to maximal fluorescence (Fv/Fm) and CO2 fixation of microalgae in column PBRs modified with portable conical helix baffles (PCHBs). A Effects of PCHBs on dry mass of Limnospira fusiformis. B Measurement of solution pH during cultivation of Limnospira. C Effects of PCHBs on maximum quantum efficiency of PSII (Fv/Fm) of Limnospira. D Effects of PCHBs on CO2 fixation rate during cultivation of Limnospira