RESUMO
In this study, Chlorella vulgaris NIOCCV was cultivated in seafood processing industry wastewater with continuous supply of 5%, 10%, and 20% CO2. The optimum CO2 fixation efficiency ( [Formula: see text] ), biomass productivity, specific growth rate (SGR), and lipid content recorded were 0.43â¯mgâ¯L-1â¯d-1, 264.58⯱â¯8.8â¯mgâ¯L-1â¯d-1, 0.46â¯d-1, and 38⯱â¯2.6% on dry weight basis, respectively at CO2 supply of 10%. The fatty acid methyl ester-derived biodiesel properties determined at same condition were in compliance with national and international fuel standards. The higher calorific value (HHV) of the resultant biomass was 11.14, 16.41 and 12.83â¯MJ Kg-1 for CO2 enrichment of 5%, 10%, and 20%, respectively. The synergistic environmental benefit of nutrients removal from wastewater is shown as an additional advantage of microalgal cultivation. Thus, integration of algae-based CO2 fixation with wastewater treatment and biodiesel production may realize microalgal CO2 capture technology as environmentally sustainable and economically more attractive.