Experiences with aerobic granular sludge for large urban wastewater treatment plants
Andreas Giesen (Haskoning)
Mark C.M. van Loosdrecht (TU Delft - Applied Sciences)
Debby Berends (Haskoning)
Asher Buchbut (Jerusalem Sewage Water and Purification Enterprises)
Marisa Buyers–Basso (Haskoning)
Brett Quimby (Aqua-Aerobic Systems Inc.)
Erik Rekswinkel (Hoogheemraadschap De Stichtse Rijnlanden)
Dara White (Uisce Éireann)
M. Pronk (TU Delft - Applied Sciences)
W.Y. Victoria Chan (The Government of the Hong Kong Special Administrative Region of the People’s Republic of China)
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Abstract
Practical experiences demonstrating the implementation of aerobic granular sludge (AGS) and its economic and technical suitability for large wastewater treatment plants (WWTPs) across various climate regions are presented. Applications include hybrid AGS configuration, in which AGS surplus sludge is directed into activated sludge reactors. This approach enhances and intensifies the processes of both continuous-flow or sequencing batch reactor (SBR) activated sludge systems. Additionally, the study compares ultrafiltration of AGS effluent with membrane bioreactor with membranes integrated in the activated sludge system. In the examined application case, AGS with downstream ultrafiltration achieved 39% lower operational costs, while providing a greater treatment capacity within a similar footprint. Overall, these findings confirm that AGS has matured into a fully developed technology, now also successfully applied worldwide within large and very large WWTPs.
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