Considering that the Brazilian semi-arid region still suffers from water scarcity and lack of access to drinking water, Anna (now 20) developed when she was 15 years old a filter (Aqualuz) based on SODIS (solar disinfection). It is composed of an inlet filter filled with fibers capable of retaining physical particles, a reservoir made of polyethylene with a glass cover and a monitoring indicator. It is now made for rain harvesting systems, and can be adapted to any water source.

Two years ago, Anna created SDW (Safe Drinking Water For All), a company that provides water supply solutions to rural areas. SDW is now piloting Aqualuz and distributing it to vulnerable communities in Brazil and beyond.