Figure 4From: The effect on growth of Chlamydomonas reinhardtii of flue gas from a power plant based on waste combustionMean effective PFD at different threshold values of daylight useable for the growth of the microalgae. PFD values above the threshold value were set to the threshold value, i.e. if PFD values above 300 μmol m-2 s-1 are recognised as having no effect, the effective PFD was set to 300 μmol m-2 s-1.Back to article page