A study underway in Illinois is examining whether food waste can serve as a viable feedstock for producing sustainable aviation fuel, adding a major Midwest state to the roster of regions assessing non-conventional SAF pathways.

The research, reported by Biomass Magazine, focuses on feasibility — the practical question of whether the volumes of food waste generated in Illinois can be collected, processed and converted into jet fuel at a scale and cost that make sense for fuel producers and, ultimately, airlines.

Food waste sits among the more complex feedstock categories under consideration for SAF production. Unlike used cooking oil or tallow, which already flow through established collection chains, food waste is dispersed, heterogeneous and moisture-heavy, all characteristics that raise both logistics costs and conversion challenges. Studies of the type now underway in Illinois are intended to establish whether those obstacles can be cleared.

The state brings real feedstock potential to the question. Illinois anchors a dense metropolitan food system in Chicago and sits within the country's most productive agricultural region, a combination that generates substantial volumes of waste streams from processing, distribution and consumption. Quantifying those streams — and mapping them against potential processing sites — is the core analytical work such feasibility studies perform.

For airlines, the outcome matters in straightforward commercial terms. SAF remains several times more expensive than conventional Jet A, and feedstock availability is the binding constraint on production scale-up. Every additional viable feedstock category widens the supply pool and gives fuel producers more room to bid down costs. Carriers across the US and Europe have signed offtake agreements on the assumption that supply will grow fast enough to meet rising blending mandates and voluntary targets; feedstock studies like Illinois' are the groundwork that determines whether those agreements convert into delivered gallons.

The regulatory backdrop adds urgency. US federal incentives for SAF production, alongside state-level clean fuel programs, have pushed producers and researchers to certify new pathways and qualify new feedstocks under accepted lifecycle-emissions methodologies. A feedstock that clears those hurdles becomes bankable; one that does not remains a laboratory exercise.

The Illinois effort also reflects a broader pattern in SAF development: much of the near-term progress is happening at state and regional level, where universities, agriculture departments and local industry can assess feedstock economics with a specificity national assessments cannot match.

What the study ultimately produces — a cost curve, a volume estimate, a recommended conversion pathway or a verdict that the economics do not close — will determine whether food waste joins ethanol-to-jet, fatty acid pathways and e-fuels as a certified route to renewable jet fuel, or stays on the margin of the industry's decarbonisation effort.