The effect of flow rates and composition of culture medium in Chlorella Pyrenoidosa cultivation by CO2 injection method

Abstract

Carbon dioxide emission is one of the main causes of global warming, which is caused by the evolution of the atmosphere from a mixture of gases originating from the interior of the earth. To overcome the problem of CO₂ gas emissions, efforts have been made to reduce CO₂ emissions by capturing CO₂ with the Carbon Capture Storage (CCS) method, which aims to reduce carbon emissions released into the atmosphere. Biological CO₂ capture generally uses microalgae cultivation. Previous research has used an open pond development system, with varied types of microalgae. In this study, CO₂ capture was carried out using microalgae species Chlorella pyrenoidosa in a photobioreactor (PBR). This study results an optimum biomass productivity for Chlorella pyrenoidosa, the variation of NaHCO₃ 0 ppm is 4.090 g. l⁻¹. d⁻¹ on day 7, followed by variation of flow rate is is 2.844 g. l⁻¹. d⁻¹ on day 7. Suggestions for further research is to calculate the optimal cost incurred at the optimal CO₂ concentration that can be captured by microalgae and the resulting increase in the value of the biomass microalgae that can be produced so that the use of microalgae can carried out comprehensively.