Brazilian teen Lucas Tadao makes eco trays from cassava peels to fight

As global concern mounts over plastic pollution and the environmental damage caused by non-biodegradable materials, innovative solutions are emerging from unexpected quarters. In Brazil, 14-year-old student Lucas Tadao Sugahara Wernick is drawing national attention with his development of a biodegradable alternative to conventional Styrofoam food trays, using agricultural waste sourced from the country’s own backyard. The project, developed as a school science initiative in Curitiba, the capital of Paraná state, seeks to address the environmental impact of single-use plastics by using cassava peels and araucaria tree residues that would otherwise be discarded.

Lucas began exploring sustainable packaging materials after confronting the grim reality that Styrofoam, widely used for packaging fruits, vegetables, and meats, can persist in the environment for centuries. According to project documentation, Styrofoam can take up to 700 years to decompose, contributing significantly to long-term plastic pollution. Seeking environmentally responsible alternatives, Lucas turned to cassava peels, a by-product of Brazil’s well-established food industry, and to araucaria tree residues, which naturally fall from Paraná pine trees and are typically treated as waste.

The trays are produced by combining dried, ground cassava peels and processed araucaria residues with water and cassava starch. After cleaning and grinding the raw materials into fine particles, the mixture is heated and pressed into molds before undergoing a drying process. The use of cassava starch, a natural binding agent derived from the abundant local crop, eliminates the need for petroleum-based plastics or synthetic additives. The resulting trays are intended to replace traditional Styrofoam containers for packaging fresh produce.

Experimental results suggest the biodegradable trays offer a dramatic improvement in environmental performance compared to Styrofoam. Lucas reported that under suitable conditions, the trays decompose in roughly 30 days - a stark contrast to the centuries-long persistence of conventional alternatives. To confirm the packaging’s real-world viability, the project included tests for compression strength, pressure resistance, torsion, water absorption, and biodegradability. The trays demonstrated sufficient mechanical strength for use in food packaging while successfully breaking down in moist soil.

Cassava peels are a particularly promising resource for such innovations, given that Brazil is one of the world’s largest producers of cassava. The peels contain valuable natural starch that can serve as an adhesive, supporting the formation of lightweight composites when combined with fibrous tree residues. This approach reduces reliance on new raw materials, aligning with the principles of a circular economy by giving new life to materials that would otherwise be wasted.

Lucas’s invention has brought recognition at Brazilian science fairs, including the PUCPR Science Fair, and has been published in the proceedings of a scientific initiation symposium. The success of the project underlines the broader potential of agricultural waste as a raw material for biodegradable packaging, a solution that is gaining prominence as countries worldwide seek to curb their reliance on petroleum-based plastics. While additional development is needed to enable large-scale manufacturing and deployment, the project demonstrates how grassroots innovation, using local resources and waste streams, could play a key role in reducing plastic pollution and shaping a more sustainable future.