The Aga Khan Award for Architecture (AKAA) has announced its 20 shortlisted projects for the 2022 award cycle. Competing for the US$ 1 million prize, one of the largest rewards in architecture, the 20 architectural developments located in 16 different countries, were selected by a Master Jury from a pool of 463 projects nominated for the 15th Award Cycle (2020-2022). The jury, among which are Anne Lacaton, Francis Kéré, Nader Tehrani, and Amale Andraos, will meet again this summer to examine the on-site reviews and determine the final recipients of the Award.

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The LIMPAR SANTANA project involves constructing a sustainable basic sanitation system to clean up the waterways of Quilombo de Santana, in the state of Rio de Janeiro, aiming to improve the quality of drinking water in local homes.

Based on an assessment of the area's topography, geotechnics, and geography, the proposal suggests using evapotranspiration basins—a system that treats effluent through natural filtration and evaporation via banana leaves—and biodigester tank systems that convert wastewater into a usable byproduct for agriculture.