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Simultaneous oxygen and carbon variation within an RBC biofilm as function of different operating conditions / Sergio A. Martinez-Delgadillo in Industrial & engineering chemistry research, Vol. 48 N°3 (Février 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°3 (Février 2009) . - p. 1270–1276 Titre : Simultaneous oxygen and carbon variation within an RBC biofilm as function of different operating conditions Type de document : texte imprimé Auteurs : Sergio A. Martinez-Delgadillo, Auteur ; Denis Cantú-Lozano, Auteur ; Carlos Montalvo, Auteur Année de publication : 2009 Article en page(s) : p. 1270–1276 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Biological  contactors  Biofilm  Oxygen  Carbon Résumé : In this work, a model that considers the change in biofilm density at different biofilm depths was applied. Two correlations, describing the variations of the oxygen and substrate effective diffusivities as functions of the biofilm density and depth, were introduced. The model was validated with experimental data of oxygen concentrations measured with a microelectrode at different biofilm depths in a laboratory-scale rotating biological contactor (RBC) system at different rotational speeds (1.25, 2.75, and 5.25 rpm.), using municipal wastewater. The oxygen and substrate concentration profiles depend on the position on the biodisk. Comparisons between the COD and oxygen concentration profiles obtained with the model and those obtained considering the microorganism density and diffusivities to be constant were performed. The effects of the biokinetic parameters μmax, KS, and KO2 on the COD and oxygen concentration profiles inside the biofilm were tested. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8005885 [article] Simultaneous oxygen and carbon variation within an RBC biofilm as function of different operating conditions [texte imprimé] / Sergio A. Martinez-Delgadillo, Auteur ; Denis Cantú-Lozano, Auteur ; Carlos Montalvo, Auteur . - 2009 . - p. 1270–1276. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°3 (Février 2009) . - p. 1270–1276 Mots-clés : Biological  contactors  Biofilm  Oxygen  Carbon Résumé : In this work, a model that considers the change in biofilm density at different biofilm depths was applied. Two correlations, describing the variations of the oxygen and substrate effective diffusivities as functions of the biofilm density and depth, were introduced. The model was validated with experimental data of oxygen concentrations measured with a microelectrode at different biofilm depths in a laboratory-scale rotating biological contactor (RBC) system at different rotational speeds (1.25, 2.75, and 5.25 rpm.), using municipal wastewater. The oxygen and substrate concentration profiles depend on the position on the biodisk. Comparisons between the COD and oxygen concentration profiles obtained with the model and those obtained considering the microorganism density and diffusivities to be constant were performed. The effects of the biokinetic parameters μmax, KS, and KO2 on the COD and oxygen concentration profiles inside the biofilm were tested. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8005885