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Stanford bioengineer transforms food waste into cheese-like product
A research team at Stanford University has developed a method to produce a cheese alternative using food waste and fungal fermentation, offering a sustainable solution to food industry byproducts.
How fermentation turns waste into food
Vayu Hill-Maini, a bioengineer leading the project, explains that fermentation-where microorganisms convert carbohydrates into other substances without oxygen-can repurpose waste into edible products. While fermentation is commonly associated with bread and beer, his lab explores unconventional substrates like agricultural byproducts.
"We discovered we could take waste, combine it with a few ingredients, and use fungal fermentation to create a cheese resembling Pecorino or Parmigiano," Hill-Maini said.
Companies leverage biotech to upcycle food waste
Several startups are applying similar techniques to reduce waste and create new food products. UK-based Fermtech ferments discarded cocoa shells into a cocoa powder substitute, preserving the natural chocolate flavor while making the nutrients bioavailable.
"Food industry byproducts are often composted or burned, but microorganisms can break down tough plant materials while retaining their flavors," said Andy Clayton, Fermtech's CEO.
Andy Clayton, Fermtech CEO
AI accelerates fermentation innovation
Spain's MOA Foodtech uses artificial intelligence to optimize fermentation processes. By analyzing environmental data and microbial genomes, the company's AI platform can design 300 bioprocesses per hour-up from just one every two weeks when the company launched.
MOA focuses on repurposing pea industry byproducts, such as starch and fiber, which would otherwise be sold cheaply for animal feed or discarded. "We're like flavor miners," said CEO Bosco Emparanza.
From molasses to pet food and plant-based tuna
Germany's MicroHarvest converts sugar industry byproducts, like molasses, into premium pet food. Their Vegcat snack, made from these side streams, offers an umami taste without the bitterness of some plant-based proteins.
In Singapore, Mottainai Food Tech-named after the Japanese term for waste aversion-uses okara, a soy pulp left from tofu production, to create Jiro Meat, a plant-based meat substitute. The company is also developing a plant-based tuna alternative.
"In five years, we hope to offer a wide range of ingredients through our fermentation platform," said Daryl Pek, Mottainai cofounder.
Daryl Pek, Mottainai Food Tech cofounder
Precision fermentation enhances flavor and digestibility
Hill-Maini's lab employs precision fermentation, genetically engineering microorganisms to produce specific materials. This method can adjust texture, aroma, and even digestibility-for example, breaking down indigestible cellulose into protein.
"Fungi act as bioconversion machines, transforming complex molecules into digestible substances," Hill-Maini explained. The lab collaborates with chefs to ensure their products are appealing to consumers.
Future of sustainable food innovation
While the Stanford team has not disclosed the exact waste substrate used for their cheese-like product, they confirmed it was made with Neurospora mold. The result is a salty, grateable cheese suitable for pasta dishes.
"It's exciting to see fermentation turn waste into something delicious," Hill-Maini said.
Vayu Hill-Maini, Stanford bioengineer
