| Diphasic transfer of oxygen in vertical flow filters: a modelling approach. | |
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MedLine Citation:
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PMID: 22053464 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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Oxygen renewal, as a prominent phenomenon for aerobic bacterial activity, deeply impacts vertical flow constructed wetland (VFCW) treatment efficiency. The authors introduce a multiphase model able to simulate oxygen transfer in VFCWs. It is based on a two-phase flow module, and a transport module. The transport module is able to deal with convection/diffusion phenomena, inter-phase (air-water) mass exchange, and first-order kinetics. The first results displayed for the air phase allow us to draw the following ideas on the design of vertical filters. The ponding phenomenon is more efficient for oxygen renewal than non-ponding batch loading: it provides a higher value, sooner, and deeper in the filter. In non-colonised filters and for standard batch loading, oxygen convection in the air phase is predominant for oxygen renewal. The seepage front limits oxygen renewal through the bottom of the filter and leads to an insufficient oxygen concentration on the lowest part of the filter. |
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Authors:
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A Petitjean; A Wanko; N Forquet; R Mosé; F Lawniczak; Antoine Sadowski |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Water science and technology : a journal of the International Association on Water Pollution Research Volume: 64 ISSN: 0273-1223 ISO Abbreviation: Water Sci. Technol. Publication Date: 2011 |
Date Detail:
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Created Date: 2011-11-07 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9879497 Medline TA: Water Sci Technol Country: England |
Other Details:
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Languages: eng Pagination: 109-16 Citation Subset: IM |
Affiliation:
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Institut de Mécanique des Fluides et des Solides de Strasbourg UDS/CNRS/ENGEES/INSA, 2 rue Boussingault, 67 000 Strasbourg, France. alain.petitjean@imfs.u-strasbg.fr |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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