| Experimental and numerical investigations of sedimentation of porous wastewater sludge flocs. | |
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MedLine Citation:
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PMID: 21144545 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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The paper studies the properties and sedimentation characteristics of sludge flocs, as they appear in biological wastewater treatment (BWT) plants. The flocs are described as porous and permeable bodies, with their properties defined based on conducted experimental study. The derivation is based on established geometrical properties, high-speed camera data on settling velocities and non-linear numerical model, linking settling velocity with physical properties of porous flocs. The numerical model for derivation is based on generalized Stokes model, with permeability of the floc described by the Brinkman model. As a result, correlation for flocs porosity is obtained as a function of floc diameter. This data is used in establishing a CFD numerical model of sedimentation of flocs in test conditions, as recorded during experimental investigation. The CFD model is based on Euler-Lagrange formulation, where the Lagrange formulation is chosen for computation of flocs trajectories during sedimentation. The results of numerical simulations are compared with experimental results and very good agreement is observed. |
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Authors:
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M Hriberšek; B Zajdela; A Hribernik; M Zadravec |
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Publication Detail:
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Type: Journal Article Date: 2010-11-20 |
Journal Detail:
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Title: Water research Volume: 45 ISSN: 1879-2448 ISO Abbreviation: Water Res. Publication Date: 2011 Feb |
Date Detail:
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Created Date: 2011-01-17 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0105072 Medline TA: Water Res Country: England |
Other Details:
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Languages: eng Pagination: 1729-35 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Elsevier Ltd. All rights reserved. |
Affiliation:
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Faculty of Mechanical Engineering, University of Maribor, Slovenia. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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