Biodrying performance and bacterial community structure under variable and constant aeration regimes during sewage sludge biodrying

This study investigated biodrying performance under variable and constant aerations. The matrix-related properties, air-related parameters, and bacterial community were assessed. Under variable aeration, the velocity and temperature of the air above the pile surface were high; bacterial diversity indicated that the biodrying was achieved during an established period; Proteobacteria was dominant throughout the biodrying; and there was better performance of the biodrying product intended for direct incineration or for postcuring land use. Different aeration conditions led different biomass percentages, but the dominant phyla were similar.