Unlocking Flavor: How Ancient Fermentation Techniques Transform Food Waste

At Stanford University in California, bioengineer Vayu Hill-Maini is redefining the boundaries of dairy alternatives. His laboratory has developed a novel cheese—or at least a product that closely mimics its taste—derived entirely from food waste. By utilizing fungi to drive fermentation, Hill-Maini has managed to convert discarded materials into a savory delicacy. "One of the most amazing things that we found recently is that we could take waste and add a few other ingredients in a fungal fermentation and create this delicious cheese that is like a Pecorino or Parmigiano," he explains.

Fermentation is a biological mechanism in which organisms transform carbohydrates, such as starches or sugars, into compounds like alcohol in the absence of oxygen. While most people associate this process with baking and brewing—where yeast converts sugar into ethanol and carbon dioxide—it is far more versatile. Any substance suitable for this process is known in biology as a substrate. Leveraging modern biotechnology, companies are now repurposing food industry by-products, which are often discarded or deemed low-value, using fermentation to create valuable new products.

In the UK, Fermtech is applying this technology to cocoa shells, a waste product typically thrown away. The result is a cocoa powder substitute. Andy Clayton, Fermtech’s CEO, highlights the potential inherent in this waste: "If you were to sniff a bag of cocoa shells, you would be really struck by the intense chocolatey nature of it." Clayton argues that it is a missed opportunity to compost or burn these by-products. Instead, he advocates for using microorganisms to break down plant structures, making nutrients bioavailable for humans while preserving their natural flavors. According to Clayton, expanding the range of substrates used in fermentation can reduce costs, benefit the environment, and enhance flavor profiles. "We're kind of like flavour miners," he says.

Consider the pea, which is composed of approximately 25% protein. As pea protein becomes a staple in plant-based diets, the remaining 75% poses a disposal challenge. However, Bosco Emparanza, CEO of Spain’s MOA Foodtech, views this remainder as ideal for fermentation. "That makes 'a perfect substrate for fermentation,'" Emparanza notes. His company collects data on environmental conditions and available substrates, while also sequencing the genomes of microorganisms relevant to the food sector. Using this information, MOA has trained artificial intelligence to determine the optimal pairings of substrates and microorganisms to maximize yields.

Emparanza is impressed by the efficiency of this AI-driven approach. "When we started the company, we were able to develop one bioprocess in two weeks," he recalls, referring to the use of living cells to produce goods. "Nowadays, the platform can develop 300 bioprocesses per hour." By applying this technology, MOA Foodtech identified the best microorganisms to utilize leftover starch and fiber from the pea protein industry. These by-products are often sold at negligible prices for animal feed or discarded entirely. MOA is now working to reintegrate these materials into the human food supply chain.

Meanwhile, Germany’s MicroHarvest has engineered a proprietary method to accelerate fermentation. The company utilizes sugar industry by-products, such as molasses, which is not commonly consumed by humans in Germany. Instead of selling molasses to farmers for cattle feed, MicroHarvest collaborates with sugar producers and pet food manufacturers to transform these side streams into high-quality pet food. Katelijne Bekers, co-founder and CEO of MicroHarvest, describes their cat snack, Vegcat, as having a rich umami flavor, avoiding the bitterness often associated with plant-based proteins.

In Singapore, Mottainai Food Tech shares a similar mission: to valorize unconventional and underappreciated ingredients that are both nutritious and widely accessible across Asia. The company’s name is derived from the Japanese word mottainai, expressing regret over waste—a sentiment akin to the English proverb "waste not, want not." The company has successfully produced a meat substit

Source: BBC News Generated at: 2026-06-04 23:10:26 UTC