A 3-DIMENSIONAL AERATION TANK MODEL FOR ACTIVATED SLUDGE SIMULATION, USING OFF-LINE COMPUTATIONAL FLUID DYNAMICS (CFD) DATA
Authors: Snowling, S.; Belia, E.; Copp, J.; Schraa, O.
Source: Proceedings of the Water Environment Federation, WEFTEC 2005: Session 71 through Session 80 , pp. 5987-5993(7)
Publisher: Water Environment Federation
Abstract:Conventional activated sludge modeling approaches have assumed that reactors are either completely mixed, or equivalent to a group of completely mixed reactors in series. In most cases this is sufficient, as most well-aerated tanks (aerated either mechanically or with diffused air) achieve a good level of mixing through the aeration process. In some cases, however, a lack of complete mixing can have a significant effect on the biological activity. To accurately model these less-than-completely-mixed tanks, a more sophisticated, spatially-discrete aeration tank model is required.
This paper discusses the development and application of a dynamic 3-dimensional activated sludge model. This new approach is contrasted against a typical completely mixed approach, highlighting the differences in nitrification.
Document Type: Research Article
Publication date: January 1, 2005
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