Hasegawa Flavors and Yokohama National University Present Upcycling Research on Coffee Grounds into Nanofibers

Transforming Coffee Waste into Innovation

Hasegawa Flavors, a leader in flavor creation based in Chuo-ku, Tokyo, has embarked on an exciting venture in collaboration with Yokohama National University. Together, they've developed groundbreaking research focusing on the upcycling of spent coffee grounds, a common food waste, into holocellulose nanofibers (HCNF). These nanofibers serve as emulsifying stabilizers in flavor formulations. The findings were unveiled at the 2026 Annual Meeting of the Japanese Society of Agricultural and Food Chemistry, held from March 9th to 12th in Kyoto.

The research project, titled Preparation of Cellulose Nanofibers Derived from Coffee Grounds and Their Application as Emulsifying Stabilizers in Flavor Formulations, saw contributions from esteemed researchers including Takahiro Sakai and Yuya Ueda from Hasegawa Flavors, along with Nako Higuchi, Ayaka Mitsumegawa, Noriko Kanai, and Ikki Kawamura from Yokohama National University.

Every year, over 6 million tons of spent coffee grounds are discarded worldwide, creating a significant environmental challenge. This collaborative research highlights the urgent need for sustainable technologies to address food waste. By utilizing holocellulose, which is abundant in coffee grounds, the researchers employed a low-impact physical shock method to produce HCNF. The study then analyzed its application as an emulsifying stabilizer for flavor formulations.

Advanced imaging techniques, such as Atomic Force Microscopy (AFM), were employed to analyze the properties of the produced nanofibers. The results revealed that the HCNF exhibited an exceptionally fine fiber width ranging from 2 to 3 nanometers. Moreover, these nanofibers demonstrated a remarkably high emulsifying and dispersing ability for oil-soluble components, including medium-chain triglycerides and d-limonene.

This remarkable achievement signifies a tangible transformation of previously discarded resources into valuable components for flavor formulations, embodying the concept of upcycling. The research is not only innovative but also holds promise for contributing to sustainable product development.

Moving forward, Hasegawa Flavors is committed to further exploring the potential applications of this technology. Their goal is to ensure the creation of environmentally friendly, high-quality flavor formulations that cater to the tastes of consumers while simultaneously addressing sustainability challenges. This project exemplifies how academia and industry can collaborate effectively, forging a path toward a more responsible approach to resource utilization in the food and flavor industry.

In conclusion, this research delivers encouraging insights into the upcycling of food waste into valuable products, paving the way for future developments that prioritize environmental considerations without sacrificing product quality.