Overview
- The team from Southern Illinois University presented 3D‑printed prototype µBites cookies at the American Chemical Society meeting on Monday, showing a complete lab workflow from waste to baked biscuit.
- The process breaks PET and agricultural biomass into a liquid feedstock using oxidative hydrothermal dissolution, feeds that broth to engineered yeast strains, and combines the microbes’ proteins, fats and flavor compounds into a printable food slurry.
- Lab analyses and accredited third‑party tests reported no detectable toxins, heavy metals, allergens or food pathogens, and simulated digestion studies are under way; formal human taste tests have not yet been approved.
- In current demonstrations the system converts more than 50% of feedstock carbon with about 10% potentially unconverted or released, takes roughly a day or two to run, and the reported prototype cost is about $60 per kilogram as researchers work to cut cost and boost yield.
- Researchers frame µBites as a portable, near‑zero‑waste concept for disaster relief, submarines and long missions to the Moon or Mars, but stress major hurdles remain on safety validation, regulatory approval, scale up and simplifying the roughly 33‑step process.