Integrated energy efficient microwave and unique fermentation processes for pilot scale production of high value chemicals from lignocellulosic waste

A single microwave step breaks down wood chips, straw, and other plant waste into sugars that a hardy yeast can turn into valuable chemicals. The UK needs a “bioeconomy” that turns waste into useful products instead of relying on fossil fuels. But current methods for breaking down tough plant fibres require multiple acid treatments and expensive enzymes, making the process too costly for industry. The researchers discovered that a one-step microwave process uses far less energy to release sugars from waste, though it also creates compounds that kill most yeasts. One yeast species, *Metschnikowia pulcherrima*, thrives in that environment and converts the sugars into three marketable products: a rose-scented alcohol used in perfumes and flavours, a sugar alcohol for sweeteners, and oils for biofuels or cosmetics. If this works at pilot scale, it could turn agricultural waste—straw, husks, sawdust—into a cheap feedstock for chemical manufacturing, replacing petroleum-based processes. The biorefinery would produce multiple products from a single waste stream, improving economics for rural industries and reducing landfill. This is applied engineering, not fundamental science: the team is building and testing a working pilot plant to prove the process can leave the lab.