Optimization of gas and nutrient concentrations in the photobioreactor system
DOI:
https://doi.org/10.18537/mskn.16.02.11Keywords:
Combustion gases, gas capture, Scenedesmus sp, nutrients, microalgaeAbstract
Microalgae research provides technological solutions for capturing greenhouse gases by converting industrial CO₂ emissions into commercially valuable microalgal biomass, such as agricultural biostimulants. This process simultaneously combines environmental benefits through emission reduction with the production of industrially relevant bioproducts. To optimize their growth in photobioreactors, determining optimal nutrient levels and CO₂ concentration is critical. In pilot tests, a nitrogen dosage of 100 ppm maximized yield (2.95 g m⁻²d⁻¹ at harvest 5). Additionally, three CO₂ concentrations (500, 1000, and 1500 ppm) were evaluated, supplied via diesel-generated combustion gases, with no significant differences in biomass production observed. The microalga Scenedesmus, enriched with Nitrofoska (1 ml L⁻¹), demonstrated that high CO₂ concentrations did not impair its performance. Thus, captured gases are converted into microalgal biomass, suitable as a biostimulant, proving a sustainable solution for industrial emissions.
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