Development of a Biotechnological Strategy for CO2 Capture in Coke Plant Emissions Using Microalgae
2025
Antonio Zuorro | Jefferson E. Contreras-Ropero | Renso J. Parada-Solano | Janet B. García-Martínez | Germán L. López-Barrera | Néstor A. Urbina-Suarez | Andrés F. Barajas-Solano
Coke production generates up to 400 m3/min of flue gases containing 4% CO2. This study evaluated the capacity of the microalga Halochlorella rubescens_UFPS013 to capture CO2 from emissions generated by Excomin SAS (Colombia). A Central Composite Design and response surface methodology were employed to analyze the effects of CO2 concentration and light&ndash:dark cycles on biomass production. The statistical model explained 99% of the observed variability, suggesting a robust foundation with room for further improvement. In situ test showed that H. rubescens_UFPS013 tolerated a flue gas flow rate of up to 0.587 L/min, achieving an optimal predicted biomass yield of 2 g/L under a 12.6 h photoperiod on day 20. The generated biomass exhibited significant protein (48.5%) and lipid (9.6%) content, highlighting its potential for industrial applications in the food and energy sectors. These findings underscore the role of H. rubescens_UFPS013 as a viable biotechnological tool for CO2 capture in industrial processes, with prospects for scale-up and continuous optimization, contributing to sustainable solutions in emission reduction and the production of high-value bioproducts.
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