Interestingly the consortium grown at different CO2 dosage showed different biovolume of algal strains. The biovolume of the strains in consortium were examined on 5th and 10th day of culture with all three different concentrations of CO2. The inoculum of consortium had equal amount of all the strains. For ambient and 5% CO2 the bio-volume of strains did not show any change in the ratio (data not provided), however at 10% CO2Scenedesmus sp dominated in term of bio-volume and followed by Chlorella sp. The biovolume ratio of Scenedesmus sp. increased by 50.2% than inoculum and most of their cells shown 8 cells colony on 10th days. The morphological changes occurred in the presence of high dosage CO2 and the formation of these colonies was not the result of lumping of free cells, because of the nicely arranged flat colonies, which strongly advocated that it was due to the reproduction. Previous research [27] also reported that Scenedesmus sp. are high CO2 tolerant algae.
Mainly green algae of consortium community shown increase in their bio-volume ratio except C. humicola, while cyanobacteria reflected their weak credibility towards high CO2 dosage ( Fig. 6). This study revealed that the strains which can increase or withstand their bio-volume ratio during culture at high CO2 dosage might be use as for CO2 sequestration from flue gas.