The Bio-based Aviation Fuel ecosystem spans upstream feedstock sourcing, midstream conversion and blending, and downstream distribution to airlines and airports. Upstream participants secure agricultural residues, waste oils, or dedicated energy crops and deliver them to technology providers that operate thermochemical or biochemical conversion processes. Midstream integrators manage scale‑up, certification, and blending with conventional jet fuel to meet ASTM specifications. Downstream channels—including fuel distributors, airport fuel farms, and airline procurement units—handle logistics, storage, and final delivery. Value is captured through feedstock contracts, technology licensing, fuel sales, and compliance credits, while risk is allocated across each segment.