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K. Reid, M. Corena, J. Krampe, A. Keegan, S. Rinck-Pfeiffer, B. van den Akker:
"Increasing Sequencing Batch Reactor Capacity Using Aerobic Granular Sludge Technology";
Vortrag: Ozwater 2014, Brisbane; 29.04.2014 - 01.05.2014; in: "Tagungsband (USB Stick)", (2014), 7 S.

Activated sludge treatment has been the primary biological method of wastewater treatment for the last 100 years; however recent European research has extolled the numerous benefits of a new technology, called granular sludge. Developed for sequencing batch reactors (SBRs), granular sludge technology has the potential to become the new industry standard for the biological treatment of industrial and municipal wastewater. In this work, we investigated whether granular sludge may be developed to treat municipal wastewater under Australian conditions with a focus on identifying the critical operating parameters needed to promote granular sludge formation. Pilot trials were performed in parallel to a full-scale SBR at Bolivar High Salinity WWTP in South Australia, which showed that granular sludge could be readily established by employing an anaerobic feed in plug-flow, and rapid settling time. Within six weeks of start-up, significant improvement in biomass settleability was observed and sludge volume index (SVI) values as low as 38 mL/g were achieved. Simultaneous removal of ammonia, total nitrogen, BOD5 and phosphate were also observed. Phosphate removal however, was lower than expected for this technology. Owing to the rapid settling time, our pilot data also showed that selection of granular sludge could increase SBR hydraulic capacity by 25%.