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Updated: Jun 28, 2026

A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities
Published on: December 25, 2015
Utilization of activated sludge plants for enhanced treatment of combined sewage
B Nikolavcic1, K Svardal, G Wandl
1Vienna University of Technology, Institute of Water Quality, Resources and Waste Management, Karlsplatz 13/226, 1040 Vienna, Austria. bnikolav@iwag.tuwien.ac.at
Abstract:
A process is introduced which utilizes secondary clarifiers for the treatment of combined sewage. Under storm water conditions, surplus sewage bypasses the aeration tanks after primary treatment and is directly introduced into the secondary clarifiers. The hydraulic capacity of existing activated sludge plants can be increased without additional tank volume. Particulate matter as well as dissolved compounds are removed to a high extent. Investigations on a full scale treatment plant (100,000 p.e.) show that the effluent quality is comparable with full biological treatment, even if the hydraulic loading is increased by 50%.
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