초록
The chemical absorption of carbon dioxide (CO<SUB>2</SUB>) is a technique used for the mitigation of the greenhouse effect. However, this process consumes high amounts of energy to regenerate the absorbent and to separate the CO<SUB>2</SUB>. CO<SUB>2</SUB> removal by microalgae can be obtained via the photosynthesis process. The objective of this study was to investigate the cultivation and the macromolecules production by Spirulina sp. LEB 18 with the addition of monoethanolamine (MEA) and CO<SUB>2</SUB>. In the cultivation with MEA, were obtained higher results of specific growth rate, biomass productivity, CO<SUB>2</SUB> biofixation, CO<SUB>2</SUB> use efficiency, and lower generation time. Besides this, the carbohydrate concentration obtained at the end of this assay was approximately 96.0% higher than the control assay. Therefore, Spirulina can be produced using medium recycle and the addition of MEA, thereby promoting the reduction of CO<SUB>2</SUB> emissions and showing potential for areas that require higher concentrations of carbohydrates, such as in bioethanol production.