Figure 4From: Biogenic hydrogen and methane production from Chlorella vulgaris and Dunaliella tertiolectabiomassChemical oxygen demand (COD) concentrations in cultures with algal biomass. Total COD (CODtot) concentrations and the percentage of soluble COD (CODs) at the beginning and end of the cultivation in the cultures with Chlorella vulgaris and Dunaliella tertiolecta biomass.Back to article page