São Francisco mill also produces fuel alcohol, a clean and renewable source that currently represents the only viable alternative to fossil fuels in automotive vehicles in the world. Ethanol can be made from both sugarcane juice and molasses resulting from sugar production. Such substances are submitted to a biologic fermentation process, which becomes a fermented must.
The yeast, or biological ferment, is then recovered through centrifuges, resulting in a product called wine. The majority of the recovered yeast returns to the fermentation process, while a small fraction is taken off the process, dried and traded as a high quality proteic supplement to animal feed. The wine is then sent to distillation, where hydrated alcohol is obtained.