Simulating Activated Sludge System by Simple-to-Advanced Models
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Volume 132, Issue 1
Abstract
Models ranging through simple, intermediate, and International Water Association complex activated sludge models (ASMs) were evaluated to compare their ability to describe biomass growth and substrate removal in an activated sludge system. A membrane-activated sludge bench-scale system was used to treat a complex synthetic wastewater over a wide range of operating conditions, ranging from 1 to 15 days solids retention time and 4 to 12 h hydraulic retention time. Total suspended solids, volatile suspended solids (VSSs), and total and soluble chemical oxygen demands (CODs) were monitored in the influent, the reactor, and the effluent. A variety of substrate removal formulations were used with the simple and intermediate models. Although all models provide excellent prediction of biomass growth, the intermediate model was best. Prediction of substrate removal was good with models that incorporated a nonbiodegradable component in the influent. ASM3 was the best model for predicting effluent soluble COD, but overall, the intermediate model was judged best for prediction of mixed liquor VSS and effluent soluble COD.
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Information
Published In
Journal of Environmental Engineering
Volume 132 • Issue 1 • January 2006
Pages: 42 - 50
Copyright
© 2005 ASCE.
History
Received: Dec 23, 2003
Accepted: May 6, 2005
Published online: Jan 1, 2006
Published in print: Jan 2006
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