African Journal of
Microbiology Research

  • Abbreviation: Afr. J. Microbiol. Res.
  • Language: English
  • ISSN: 1996-0808
  • DOI: 10.5897/AJMR
  • Start Year: 2007
  • Published Articles: 5232

Full Length Research Paper

Biofixation of CO2 on a pilot scale: Scaling of the process for industrial application

Felipe Camerini
  • Felipe Camerini
  • Laboratory of Biochemical Engineering, College of Chemical and Food Engineering, Federal University of Rio Grande, Rio Grande, RS, Brazil.
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Michele da Rosa Andrade Zimmermann de Souza
  • Michele da Rosa Andrade Zimmermann de Souza
  • Laboratory of Biochemical Engineering, College of Chemical and Food Engineering, Federal University of Rio Grande, Rio Grande, RS, Brazil.
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Michele Greque de Morais
  • Michele Greque de Morais
  • Laboratory of Biochemical Engineering, College of Chemical and Food Engineering, Federal University of Rio Grande, Rio Grande, RS, Brazil.
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Bruna da Silva Vaz
  • Bruna da Silva Vaz
  • Laboratory of Biochemical Engineering, College of Chemical and Food Engineering, Federal University of Rio Grande, Rio Grande, RS, Brazil.
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Etiele Greque de Morais
  • Etiele Greque de Morais
  • Laboratory of Biochemical Engineering, College of Chemical and Food Engineering, Federal University of Rio Grande, Rio Grande, RS, Brazil.
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Jorge Alberto Vieira Costa*
  • Jorge Alberto Vieira Costa*
  • Laboratory of Biochemical Engineering, College of Chemical and Food Engineering, Federal University of Rio Grande, Rio Grande, RS, Brazil.
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  •  Received: 23 June 2015
  •  Accepted: 18 February 2016
  •  Published: 07 June 2016

Abstract

The use of Spirulina in CO2 biofixation, aside from its contribution to reducing the greenhouse effect, enables the use of the biomass to obtain biocompounds. In this work, Spirulina platensis was used for CO2 biofixation under different conditions of inorganic carbon. S. platensis was inoculated into 200 L bioreactors containing modified Zarrouk’s medium (concentration of the carbon was from 1.0 to 2.0 g.L-1). CO2 (12% v/v) was injected into the culture medium intermittently to maintain the inorganic carbon concentration and pH levels favorable for growth. The values of the maximum specific growth rate obtained for both conditions were the same (0.76 day-1). However, the culture in which a concentration of 2.0 g.L-1 of NaHCO3 was maintained allowed higher concentrations of biomass (1.0 g.L-1) and higher productivity (0.11 g.L-1.d-1) to be obtained as compared to the same parameters obtained in cultures containing 1.0 g.L-1 of NaHCO3.

Key words: Bioreactor, cyanobacteria, microalgae, Spirulina.