title: Chemical absorption and CO2 biofixation via the cultivation of Spirulina in semicontinuous mode with nutrient recycle.
abstract: The chemical absorption of carbon dioxide (CO2) 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 CO2. CO2 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 CO2. In the cultivation with MEA, were obtained higher results of specific growth rate, biomass productivity, CO2 biofixation, CO2 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 CO2 emissions and showing potential for areas that require higher concentrations of carbohydrates, such as in bioethanol production.
authors.affiliation: Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, RS, Brazil.
authors.forename: Gabriel Martins
authors.initials: GM
authors.lastname: da Rosa
authors.affiliation: Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, RS, Brazil.
authors.forename: Luiza
authors.initials: L
authors.lastname: Moraes
authors.affiliation: Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, RS, Brazil.
authors.forename: Bruna Barcelos
authors.initials: BB
authors.lastname: Cardias
authors.affiliation: Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, RS, Brazil.
authors.forename: Michele da Rosa Andrade Zimmermann
authors.initials: Mda R
authors.lastname: de Souza
authors.affiliation: Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, RS, Brazil. Electronic address: jorgealbertovc@terra.com.br.
authors.forename: Jorge Alberto Vieira
authors.initials: JA
authors.lastname: Costa
mesh_terms: D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D050260:Carbohydrate Metabolism; D002241:Carbohydrates / Q000032:analysis; D002245:Carbon Dioxide / Q000737:chemistry / Q000378:metabolism*; D019856:Ethanolamine / Q000494:pharmacology; D053545:Spirulina / Q000187:drug effects / Q000254:growth & development* / Q000378:metabolism*
chemical_list: D002241:Carbohydrates; D002245:Carbon Dioxide; D019856:Ethanolamine
keywords: CO(2) capture; Microalgae; Monoethanolamine; Nutrient recycling