China's sustainable aviation fuel sector is intensifying competition for used cooking oil, squeezing biodiesel producers who depend on the same feedstock, ChemAnalyst reports.

The dynamics are straightforward: SAF refineries and biodiesel plants both rely on waste oils as their primary raw material. As China's SAF capacity ramps up, the two industries now bid against each other for a finite pool of collected cooking waste.

Why does SAF demand pressure biodiesel makers?

Aviation fuel producers entering the used-cooking-oil market bring purchasing power that established biodiesel operators struggle to match. The result is upward pressure on feedstock prices and thinner margins for biodiesel output.

For airlines and fuel buyers, the shift signals a reallocation of China's waste-oil supply toward aviation, where SAF mandates and long-term offtake agreements anchor demand.

What comes next?

Expect continued feedstock competition as China's SAF buildout progresses, with biodiesel producers facing the choice of paying more for supply or restructuring their input sourcing.