Three Indian teenagers have developed a device using tamarind seed waste to remove microplastics from drinking water.

The innovation addresses the growing crisis of plastic pollution in water supplies by repurposing organic waste into a functional filtration tool. This approach aligns with global climate-action and recycling goals to reduce the presence of synthetic polymers in human consumption chains.

Vivaan Chhawchharia, Ariana Agarwal, and Avyana Mehta, all 16 years old [1], presented their invention at the Times Network Sustainability Conclave 2026 [3]. The device, referred to as the PLAS-STICK, utilizes tamarind seeds to capture microplastics from water sources [2].

The three winners [2] designed the tool to combat plastic-polluted drinking water by transforming seed waste, which is typically discarded, into a weapon against pollution [2]. By focusing on a bio-based solution, the team aims to provide a sustainable alternative to chemical or energy-intensive filtration methods.

The presentation took place during the conclave in India, where the team detailed how the PLAS-STICK functions to trap microscopic plastic particles [3]. The project has already earned the team recognition through the Earth Prize, highlighting the role of youth-led innovation in environmental science [1].

While the team focused on the efficacy of tamarind seeds, the project emphasizes the broader potential of agricultural waste in environmental remediation. The transition from a laboratory concept to a presented device at a national conclave marks a step toward scalable water purification technology.

“Three Indian teenagers have developed a device using tamarind seed waste to remove microplastics from drinking water.”

The use of tamarind seed waste to filter microplastics represents a shift toward circular economy solutions in water treatment. By leveraging biodegradable agricultural byproducts, this innovation reduces the reliance on synthetic filters that can themselves contribute to waste, potentially lowering the cost of water purification in regions with high plastic pollution.