Biotechnological and economic assessment of the productivity of Chlorella vulgaris IBSS-19 microalgae under different cultivation regimes

The production of microalgae biomass and the management of productivity plays an important role in global biotechnology. This research aimed to study the kinetic characteristics of C. vulgaris growth, conduct an economic analysis of biomass production, and develop a simple optimization model for choosing the optimal cultivation regime. The results showed that the additional CO2 supply increased the specific growth rate of C. vulgaris by 35 % and increased productivity by 47 %. Analysis of the batch growth curve of microalgae revealed potentially effective cultivation cycles, which were two, four, and six days. Economic analysis revealed that the greatest biomass yield can be obtained using a two-day cultivation period. Depending on the biomass yield, the cost of production, net income, and profitability of production were calculated according to the cultivation cycles.