We created a compact, low-energy system that treats and makes kitchen greywater safe to reuse by combining electrocoagulation, UV light, and multi-stage filtration. It fits under the sink and automatically operates with an Arduino Mega board, reducing water use by up to 83%. In our hometown, Belén, Catamarca — a region affected by water scarcity and poor water quality — kitchens consume around one billion liters of water each year. Our system could recover up to 900 million liters annually, offering a sustainable and affordable way to improve water use, reduce the demand for clean drinking water, and minimize pollution.

This is how I came up with the idea for this project:

Belén, Catamarca faces many water issues. Choosing one was easy; solving it wasn’t. Building a treatment plant was out of reach, so we focused on individual homes. We designed an accessible, replicable system that turns personal effort into a powerful, collective impact.

Adaptability and Scalability for Real-World Impact

To make our system truly scalable and applicable in real situations, we designed it to adapt to any reality, regardless of the context. That’s why we created three different versions of the system, making it suitable for a wide range of environments and conditions. Our goal was to ensure flexibility and usefulness beyond a single scenario.