Sequencing Batch Reactor Operation for Treating Wastewater with Aerobic Granular Sludge

Sequencing Batch Reactor Operation for Treating Wastewater with Aerobic Granular Sludge

Sequencing Batch Reactor Operation for Treating Wastewater with Aerobic Granular Sludge

M. K. Jungles,
J. L. Campos
R. H. R. Costa
 

In this work, the performance of a sequencing batch reactor (SBR) on aerobic granular sludge was studied for urban wastewater treatment. The system was inoculated with aerobic activated sludge collected from a wastewater treatment plant and, after 30 days of operation, the first granules observed had an average diameter of 0.1 mm. The biomass concentration reached a maximum value around 4 g VSS L-1, and COD removal and nitrification efficiency achieved stable values of 90%. The predominant oxidizing ammonium bacteria in the granules were identified as Nitrosomonas spp .