Carbon Sequestration Mechanics: Moving Beyond Theoretical Microalgae Biomass Yields
Dear Bioprocess Engineers, Sustainability Consultants, and Carbon Capture Researchers, Mitigating industrial carbon emissions through biological sequestration represents one of the most promising frontiers in sustainable engineering. However, scaling microalgae cultures within photobioreactors (PBR) often relies on idealized laboratory constants that fail to survive real-world operational variables. Unlike static open ponds vulnerable to contamination and microclimatic shifts, closed photobioreactor systems operate as highly dynamic kinetic ecosystems. The actual carbon fixation limits are governed by interconnected variables across the fluid-gas interface. When flue gas or concentrated CO2 is injected into the culture medium, gas-liquid mass transfer kinetics determine how much dissolved inorganic carbon becomes bioavailable to the microalgae strain. Balancing the gas-liquid mass transfer coefficient (kLa) with photosynthetic photon flux density (PPFD), temperature-dependen...