Mass transfer in a membrane aerated biofilm

被引：20
|
作者：
Picard, C. [1 ,2 ,3 ]
Logette, S. [3 ]
Schrotter, J. C. [3 ]
Aimar, P. [1 ,2 ]
Remigy, J. C. [1 ,2 ]
机构：
[1] Univ Toulouse, INPT, UPS, Lab Genie Chim, F-31062 Toulouse, France
[2] CNRS, Lab Genie Chim, F-31062 Toulouse, France
[3] Veolia Environm, Rech & Innovat, F-78603 Maisons Laffitte, France
来源：
WATER RESEARCH | 2012年 / 46卷 / 15期
关键词：
Mass transfer; Convection; Membrane aerated biofilm; Wastewater treatment; Effective diffusivity; WASTE-WATER; REACTOR; FLOW; DENITRIFICATION; DIFFUSIVITY; OXYGEN; NITRIFICATION; COEFFICIENTS; TORTUOSITY;
D O I：
10.1016/j.watres.2012.05.056
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
We present experimental results of mass transfer of a non reactive tracer gas (neon) measured in aerobic heterotrophic biofilm developed from activated sludge. Biofilms are grown in various hydrodynamic conditions and the effective diffusivity is used to quantify the mass transfer through the biofilm. Beyond some cross-flow conditions, the effective diffusivity through the biofilm seems larger than in the bulk. This can be explained by a dispersion generated by convection inside the biofilm, as supported by an analytical flow model and in accordance to the numerical simulation proposed by Aspa et al. (2011). (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：4761 / 4769
页数：9
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