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Aerobic Granules Formation in Dual-Layer Percolating Filters | OMICS International | Abstract
ISSN: 2165-784X

Journal of Civil & Environmental Engineering
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Research Article

Aerobic Granules Formation in Dual-Layer Percolating Filters

Christian Drakides and Meiling Lay-Son*
Hydrosciences Laboratory, Université Montpellier II, 34095 Montpellier Cedex 05, France
Corresponding Author : Meiling Lay-Son
Hydrosciences Laboratory, Université Montpellier II
34095 Montpellier Cedex 05, France
Tel: +33-467-14- 36-24
Fax: +33-467-14-47-74
E-mail: [email protected]
Received December 20, 2011; Accepted March 29, 2012; Published March 31, 2012
Citation: Drakides C, Lay-Son M (2012) Aerobic Granules Formation in Dual- Layer Percolating Filters. J Civil Environment Engg 2:112. doi:10.4172/2165-784X.1000112
Copyright: © 2012 Drakides C, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


Aerobic spherical granules were observed in zeolitic dual-layer intermittent percolating ï»¿filters ï»¿treating domestic septic tank effluent. The diameter of the granules ranged from 0.05 to 0.5 mm and when they predominate in the biofilms the mean SVI value was of 54 ml g-1 instead of 232 ml g-1 when they were absent. Flow behavior in these filters was characterized by the dimensionless Reynolds number. The values obtained (40


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