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dc.contributor.author
Gonzo, Elio Emilio
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dc.contributor.author
Wuertz, Stefan
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dc.contributor.author
Rajal, Verónica Beatriz
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dc.date.available
2021-11-04T19:05:24Z
dc.date.issued
2012-07
dc.identifier.citation
Gonzo, Elio Emilio; Wuertz, Stefan; Rajal, Verónica Beatriz; Continuum heterogeneous biofilm model-A simple and accurate method for effectiveness factor determination; Wiley VCH Verlag; Bioengineering And Biotechnology; 109; 7; 7-2012; 1779-1790
dc.identifier.issn
0006-3592
dc.identifier.uri
http://hdl.handle.net/11336/146056
dc.description.abstract
We present a novel analytical approach to describe biofilm processes considering continuum variation of both biofilm density and substrate effective diffusivity. A simple perturbation and matching technique was used to quantify biofilm activity using the steady-state diffusion-reaction equation with continuum variable substrate effective diffusivity and biofilm density, along the coordinate normal to the biofilm surface. The procedure allows prediction of an effectiveness factor, η, defined as the ratio between the observed rate of substrate utilization (reaction rate with diffusion resistance) and the rate of substrate utilization without diffusion limitation. Main assumptions are that (i) the biofilm is a continuum, (ii) substrate is transferred by diffusion only and is consumed only by microorganisms at a rate according to Monod kinetics, (iii) biofilm density and substrate effective diffusivity change in the x direction, (iv) the substrate concentration above the biofilm surface is known, and (v) the substratum is impermeable. With this approach one can evaluate, in a fast and efficient way, the effect of different parameters that characterize a heterogeneous biofilm and the kinetics of the rate of substrate consumption on the behavior of the biological system. Based on a comparison of η profiles the activity of a homogeneous biofilm could be as much as 47.8% higher than that of a heterogeneous biofilm, under the given conditions. A comparison of η values estimated for first order kinetics and η values obtained by numerical techniques showed a maximum deviation of 1.75% in a narrow range of modified Thiele modulus values. When external mass transfer resistance, is also considered, a global effectiveness factor, η 0, can be calculated. The main advantage of the approach lies in the analytical expression for the calculation of the intrinsic effectiveness factor η and its implementation in a computer program. For the test cases studied convergence was achieved quickly after four or five iterations. Therefore, the simulation and scale-up of heterogeneous biofilm reactors can be easily carried out. © 2012 Wiley Periodicals, Inc.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley VCH Verlag
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
BIOFILM MODEL
dc.subject
CONTINUUM HETEROGENEOUS BIOFILM
dc.subject
EFFECTIVENESS FACTOR
dc.subject.classification
Otras Biotecnología del Medio Ambiente
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dc.subject.classification
Biotecnología del Medio Ambiente
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dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
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dc.title
Continuum heterogeneous biofilm model-A simple and accurate method for effectiveness factor determination
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-10-19T14:26:43Z
dc.identifier.eissn
1097-0290
dc.journal.volume
109
dc.journal.number
7
dc.journal.pagination
1779-1790
dc.journal.pais
Alemania
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dc.journal.ciudad
Weinheim
dc.description.fil
Fil: Gonzo, Elio Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; Argentina
dc.description.fil
Fil: Wuertz, Stefan. Nanyang Technological University. Singapore Centre for Environmental Life Sciences Engineering; Singapur. Nanyang Technological University; Singapur. University of California at Davis; Estados Unidos
dc.description.fil
Fil: Rajal, Verónica Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Investigaciones para la Industria Química. Universidad Nacional de Salta. Facultad de Ingeniería. Instituto de Investigaciones para la Industria Química; Argentina. University of California at Davis; Estados Unidos
dc.journal.title
Bioengineering And Biotechnology
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/bit.24441
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/10.1002/bit.24441
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