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Simulations of reactive settling of activated sludge with a reduced biokinetic model

Bürger, Raimund; Careaga, Julio; Diehl, Stefan LU ; Mejías, Camilo; Nopens, Ingmar; Torfs, Elena and Vanrolleghem, Peter A. (2016) In Computers and Chemical Engineering 92. p.216-229
Abstract

Denitrification during the sedimentation process in secondary settlers in waste-water treatment plants has been reported to be still a significant problem. The modelling of such a process with the conservation of mass leads to a nonlinear convection–diffusion–reaction partial differential equation, which needs non-standard numerical methods to obtain reliable simulations. The purpose of this study is to provide a first extension of the Bürger–Diehl settler model, which models sedimentation without reactions, to include biological reactions. This is done with a reduced biokinetic model that contains only the relevant particulate and soluble components. Furthermore, the development is limited to batch settling. The final model describes... (More)

Denitrification during the sedimentation process in secondary settlers in waste-water treatment plants has been reported to be still a significant problem. The modelling of such a process with the conservation of mass leads to a nonlinear convection–diffusion–reaction partial differential equation, which needs non-standard numerical methods to obtain reliable simulations. The purpose of this study is to provide a first extension of the Bürger–Diehl settler model, which models sedimentation without reactions, to include biological reactions. This is done with a reduced biokinetic model that contains only the relevant particulate and soluble components. Furthermore, the development is limited to batch settling. The final model describes the last settling stage of a sequencing batch reactor with denitrification. The main result of the paper is a numerical scheme that is tested for simulations with several initial conditions.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Batch sedimentation, Degenerate parabolic PDE, Numerical scheme, Sequencing batch reactor
in
Computers and Chemical Engineering
volume
92
pages
14 pages
publisher
Elsevier
external identifiers
  • scopus:84975788840
  • wos:000380513500017
ISSN
0098-1354
DOI
10.1016/j.compchemeng.2016.04.037
language
English
LU publication?
yes
id
50a89f6b-cb57-4014-9c1c-3c3d5b9a48b0
date added to LUP
2016-11-09 13:01:06
date last changed
2017-10-22 05:21:45
@article{50a89f6b-cb57-4014-9c1c-3c3d5b9a48b0,
  abstract     = {<p>Denitrification during the sedimentation process in secondary settlers in waste-water treatment plants has been reported to be still a significant problem. The modelling of such a process with the conservation of mass leads to a nonlinear convection–diffusion–reaction partial differential equation, which needs non-standard numerical methods to obtain reliable simulations. The purpose of this study is to provide a first extension of the Bürger–Diehl settler model, which models sedimentation without reactions, to include biological reactions. This is done with a reduced biokinetic model that contains only the relevant particulate and soluble components. Furthermore, the development is limited to batch settling. The final model describes the last settling stage of a sequencing batch reactor with denitrification. The main result of the paper is a numerical scheme that is tested for simulations with several initial conditions.</p>},
  author       = {Bürger, Raimund and Careaga, Julio and Diehl, Stefan and Mejías, Camilo and Nopens, Ingmar and Torfs, Elena and Vanrolleghem, Peter A.},
  issn         = {0098-1354},
  keyword      = {Batch sedimentation,Degenerate parabolic PDE,Numerical scheme,Sequencing batch reactor},
  language     = {eng},
  month        = {09},
  pages        = {216--229},
  publisher    = {Elsevier},
  series       = {Computers and Chemical Engineering},
  title        = {Simulations of reactive settling of activated sludge with a reduced biokinetic model},
  url          = {http://dx.doi.org/10.1016/j.compchemeng.2016.04.037},
  volume       = {92},
  year         = {2016},
}