Computational fluid dynamics modelling of hydraulics and sedimentation in process reactors during aeration tank settling.

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ID: 67700
2006
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Ranked #21 of 69 articles by views in water science and technology : a journal of the international association on water pollution research

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Abstract
Aeration tank settling is a control method allowing settling in the process tank during high hydraulic load. The control method is patented. Aeration tank settling has been applied in several waste water treatment plants using the present design of the process tanks. Some process tank designs have shown to be more effective than others. To improve the design of less effective plants, computational fluid dynamics (CFD) modelling of hydraulics and sedimentation has been applied. This paper discusses the results at one particular plant experiencing problems with partly short-circuiting of the inlet and outlet causing a disruption of the sludge blanket at the outlet and thereby reducing the retention of sludge in the process tank. The model has allowed us to establish a clear picture of the problems arising at the plant during aeration tank settling. Secondly, several process tank design changes have been suggested and tested by means of computational fluid dynamics modelling. The most promising design changes have been found and reported.
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jensen2006computationalwater Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Jensen, M D;Ingildsen, P;Rasmussen, M R;Laursen, J;
Journal water science and technology : a journal of the international association on water pollution research
Year 2006
DOI
DOI not found
URL URL not found
Keywords
wastewater clarifier limit of stokesian settling sedimentation sewage sludge volume index threshold of flocculation

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