Reference : Gas-liquid mass transfer in a circulating jet-loop nitrifying MBR
Scientific journals : Article
Engineering, computing & technology : Chemical engineering
http://hdl.handle.net/2268/5225
Gas-liquid mass transfer in a circulating jet-loop nitrifying MBR
English
Kouakou, Edouard [> > > >]
Salmon, Thierry mailto [Université de Liège - ULg > Département de chimie appliquée > Département de chimie appliquée >]
Toye, Dominique mailto [Université de Liège - ULg > Département de chimie appliquée > Génie de la réaction et des réacteurs chimiques >]
Marchot, Pierre mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Systèmes polyphasiques >]
Crine, Michel mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Opérations physiques unitaires >]
Nov-2005
Chemical Engineering Science
Pergamon-Elsevier Science Ltd
60
22 Sp. Iss. SI
6346-6353
Yes (verified by ORBi)
International
0009-2509
Oxford
[en] aeration ; bioreactors ; bootstrap ; mass transfer ; membrane ; recirculation reactor
[en] Based on airlift configuration, a novel circulating jet-loop submerged membrane bioreactor (JLMBR) adapted to ammonium partial oxidation has been developed. Membrane technology and combined air and water forced circulation are adopted to obtain a high biomass retention time and to achieve a separate control of mixing and aeration. This study is intended to determine how gas-liquid mass transfer is affected by operating conditions. In a first approximation, liquid was assumed to be perfectly mixed. A classical non-steady state clean water test, known as the "gas out-gas in" method, was used to determine the gas-liquid mass transfer coefficient k(L)a. Air and recirculated liquid superficial velocities were gradually increased from 0.013 to 0.019m s(-1) and 0.0056 to 0.011 m s(-1), respectively. Subsequently, the gas-liquid mass transfer coefficient kLa varied from 0.01 to 0.02 s(-1). It appears to be influenced by the combined action of air and recirculated liquid flowrates in the range 0.72-1.03N m(3) h(-1) and 0.30-0.58 m(3) h(-1), respectively, for air and liquid. Correlations are proposed to describe this double influence. Experiments were performed on tap water and a culture medium used for the autotrophic growth of nitrifying bacteria, respectively. Oxygen transfer appeared to be not significantly affected by the mineral salt (0.48 g 1(-1)) encountered in this medium. (c) 2005 Elsevier Ltd. All rights reserved.
http://hdl.handle.net/2268/5225

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