Botryococcus braunii lipid production pathways and biorefinery potential

Botryococcus braunii is a colonial microalga recognized for its ability to produce and secrete long-chain hydrocarbons, positioning it as a promising feedstock for biofuel and bioproduct applications. This review synthesizes current knowledge on race-specific hydrocarbon profiles, genetic markers for classification, and the biochemical pathways underlying lipid biosynthesis. It evaluates cultivation strategies alongside stress-based approaches to enhance productivity. Lipid recovery technologies are discussed with emphasis on sustainable, non-destructive methods such as milking and switchable solvents, which reduce energy demands and preserve cell viability. The integration of these processes within biorefinery frameworks highlights opportunities for the co-production of fuels and high-value compounds. By linking molecular insights with process engineering, this work underscores the potential of B. braunii to contribute to sustainable energy systems.