Grapevine Waste Shows Promise as Biodegradable Alternative to Plastic
A new study from South Dakota State University (SDSU) suggests that grapevine canes — the woody prunings discarded after each harvest — could help address one of the world’s most persistent environmental challenges: plastic waste, EastFruit writes.
Plastic Waste Crisis and the Search for Alternatives
Global reliance on plastics, particularly for single-use packaging, continues to generate alarming levels of pollution. Most conventional plastics are derived from crude oil, take centuries to decompose, and are rarely recycled: only about 9% worldwide is reused. The rest accumulates in landfills, oceans, and increasingly, in the human body in the form of micro- and nanoplastics, with largely unknown long-term health consequences.
Plastic bags are among the biggest contributors to waste in the United States, according to South Dakota State University (SDSU) researcher Srinivas Janaswamy, associate professor in the Department of Dairy and Food Science. His long-term goal: to create a plastic-like bag that decomposes naturally and leaves no toxic residue.
A Global Trend in Turning Waste into Value
Experts note that this research fits into a much broader trend of using agricultural residues to create sustainable packaging solutions.
“Today we see multiple breakthroughs worldwide: Indian researchers are developing biodegradable films from orange peels; in Chennai, IIT scientists use agricultural waste combined with mushroom mycelium to produce strong compostable materials; in Australia, universities are testing bioplastics for berry packaging made from PHA and wood fibers; while European and international projects convert fruit and vegetable byproducts into antioxidant and antimicrobial films that extend shelf life. Grapevine cellulose is another powerful addition to this global toolbox – showing how horticultural waste can move from being a disposal challenge to a high-value resource in the circular bioeconomy,” says Kateryna Zvierieva, director of Ukrainian Horticulture Association, agribusiness marketing expert and sustainable agriculture consultant.
Read also: Plastic-free packaging for apples, potatoes and citrus fruits launched
Grapevine Canes as a Cellulose Source
Cellulose, the most abundant organic polymer on Earth, is at the heart of this research. It gives plants their structural strength and can be extracted from agricultural byproducts ranging from avocado peels to spent coffee grounds. Janaswamy has previously produced cellulose-based films resembling traditional plastic wrapping, though each material had varying strength and transparency.
According to University website, the breakthrough came after Anne Fennell, Distinguished Professor in the Department of Agronomy, Horticulture and Plant Science, suggested grapevine canes as a feedstock. Vineyards generate large amounts of these cellulose-rich prunings annually, which are usually mulched, composted, or burned. Unlike other residues, grape canes have low water content and high cellulose density -making them particularly suitable for processing.
Stronger than Plastic – and Biodegrades in 17 Days
Working with doctoral candidates Sandeep Paudel and Sumi Regmi, along with Purdue University researcher Sajal Bhattarai, the team extracted cellulose from SDSU’s research vineyard canes and produced transparent, durable films.
According to results published in Sustainable Food Technology, the films are stronger than traditional plastic bags in tensile strength and biodegrade fully in just 17 days when placed in soil. High light transmittance also makes them suitable for food packaging, enhancing product visibility without the need to open the package.
Towards a Circular Bioeconomy
The implications are twofold: first, vineyards could turn a low-value byproduct into a raw material for sustainable packaging; second, such films could reduce reliance on petroleum-based plastics, contributing to a circular bioeconomy.
“Using underutilized grapevine prunings as a cellulose source for packaging films enhances waste management in the field and addresses the global issue of plastic pollution,” Janaswamy noted.
Funding for the research was provided by the U.S. Department of Agriculture’s National Institute of Food and Agriculture and the National Science Foundation.
While commercial scalability remains a challenge, the study represents a step closer to what Janaswamy calls his “dream” – a plastic-like shopping bag that decomposes quickly and safely in the environment.
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