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dc.contributor.author Gonzo, Elio Emilio
dc.contributor.author Wuertz, Stefan
dc.contributor.author Rajal, Verónica Beatriz
dc.date.available 2016-03-11T19:32:57Z
dc.date.issued 2014-11
dc.identifier.citation Gonzo, Elio Emilio; Wuertz, Stefan; Rajal, Verónica Beatriz; The Continuum Heterogeneous Biofilm Model With Multiple Limiting Substrate Monod Kinetics; Wiley; Biotechnology and Bioengineering; 111; 11; 11-2014; 2252-2264
dc.identifier.issn 1097-0290
dc.identifier.uri http://hdl.handle.net/11336/4742
dc.description.abstract We describe a novel procedure to estimate the net growth rate of biofilms on multiple substrates. The approach is based on diffusion-reaction mass balances for chemical species in a continuum biofilm model with reaction kinetics corresponding to a Double-Monod expression. This analytical model considers a heterogeneous biofilm with variable distributions of biofilm density, activity, and effective diffusivity as a function of depth. We present the procedure to estimate the effectiveness factor analytically and compare the outcome with values obtained by the application of a rigorous numerical computational method using several theoretical examples and a test case. A comparison of the profiles of the effectiveness factor as a function of the Thiele modulus, φ, revealed that the activity of a homogeneous biofilm could be as much as 42% higher than that of a heterogeneous biofilm, under the given conditions. The maximum relative error between numerical and estimated effectiveness factor was 2.03% at φ near 0.7 (corresponding to a normalized Thiele modulus φ* = 1). For φ < 0.3 or φ > 1.4, the relative error was less than 0.5%. A biofilm containing aerobic ammonium oxidizers was chosen as a test case to illustrate the model's capability. We assumed a continuum heterogeneous biofilm model where the effective diffusivities of oxygen and ammonium change with biofilm position. Calculations were performed for two scenarios; Case I had low dissolved oxygen (DO) concentrations and Case II had high DO concentrations, with a concentration at the biofilm–fluid interface of 10 g O2/m3. For Case II, ammonium was the limiting substrate for a biofilm surface concentration, CNs, ≤13.84 g of N/m3. At these concentrations ammonium was limiting inside the biofilm, and oxygen was fully penetrating. Conversely, for CNs > 13.84 g of N/m3, oxygen became the limiting substrate inside the biofilm and ammonium was fully penetrating. Finally, a generalized procedure to estimate the effectiveness factor for a system with multiple (n > 2) limiting substrates is given.
dc.format application/pdf
dc.language.iso eng
dc.publisher Wiley
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject BIOFILM
dc.subject CONTINUUM HETEROGENEPOUS MODEL
dc.subject MULTIPLE SUBSTRATE MONOD KINETICS
dc.subject.classification Biotecnología Medioambiental
dc.subject.classification Biotecnología del Medio Ambiente
dc.subject.classification INGENIERÍAS Y TECNOLOGÍAS
dc.title The Continuum Heterogeneous Biofilm Model With Multiple Limiting Substrate Monod Kinetics
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion
dc.date.updated 2016-03-30 10:35:44.97925-03
dc.journal.volume 111
dc.journal.number 11
dc.journal.pagination 2252-2264
dc.journal.pais Estados Unidos
dc.journal.ciudad Hoboken
dc.description.fil Fil: Gonzo, Elio Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Salta. Instituto de Investigación para la Industria Química (i); Argentina
dc.description.fil Fil: Wuertz, Stefan. Nanyang Technological University. School of Biological Sciences. Singapore Centre on Environmental Life Sciences Engineering; Singapur. University Of California At Davis; Estados Unidos. Nanyang Technological University. School of Civil and Environmental Engineering; Singapur
dc.description.fil Fil: Rajal, Verónica Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Salta. Instituto de Investigación para la Industria Química (i); Argentina
dc.journal.title Biotechnology and Bioengineering
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/wol1/doi/10.1002/bit.25284/abstract
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/bit.25284
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/issn/1097-0290


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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)