E3S Web of Conferences (Jan 2023)

Spirulina Cultivation Using Biogas CO2 as the Carbon Source: Preliminary Study on Biomass Growth and Productivity

  • Kumar Oruganti Raj,
  • Kumar Kumara Madhu,
  • Tejavath Rakesh,
  • Sriariyanun Malinee,
  • Bhattacharyya Debraj

DOI
https://doi.org/10.1051/e3sconf/202342801005
Journal volume & issue
Vol. 428
p. 01005

Abstract

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Anthropogenic activities are causing a rapid increase in global carbon dioxide (CO2) emissions, which significantly contribute to global warming. Microalgae can be a sustainable solution for simultaneous wastewater treatment and sequestering CO2 through photosynthesis. The current study reports a comparative evaluation of Spirulina sp. microalgal biomass growth and lipid productivity during its cultivation supplied with air and biogas from an anaerobic digester. It was observed that there was a 4-fold increase in biomass productivity in the reactor sparged with biogas compared to air supply. The reactor sparged with biogas showed a significant increase in lipid content. This increase in biomass productivity could be attributed to the increased availability of CO2, favoring algal growth.

Keywords