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Concentration-driven models revisited : towards a unified framework to model settling tanks in water resource recovery facilities

(2017) WATER SCIENCE AND TECHNOLOGY. 75(3). p.539-551
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Abstract
A new perspective on the modelling of settling behaviour in water resource recovery facilities is introduced. The ultimate goal is to describe in a unified way the processes taking place both in primary settling tanks (PSTs) and secondary settling tanks (SSTs) for a more detailed operation and control. First, experimental evidence is provided, pointing out distributed particle properties (such as size, shape, density, porosity, and flocculation state) as an important common source of distributed settling behaviour in different settling unit processes and throughout different settling regimes (discrete, hindered and compression settling). Subsequently, a unified model framework that considers several particle classes is proposed in order to describe distributions in settling behaviour as well as the effect of variations in particle properties on the settling process. The result is a set of partial differential equations (PDEs) that are valid from dilute concentrations, where they correspond to discrete settling, to concentrated suspensions, where they correspond to compression settling. Consequently, these PDEs model both PSTs and SSTs.
Keywords
SIMULATION, compression, discrete settling, primary clarifier, secondary clarifier, settling velocity distribution

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Chicago
Torfs, Elena, M Carmen Martí, Florent Locatelli, Sophie Balemans, Raimund Bürger, Stefan Diehl, Julien Laurent, Peter A Vanrolleghem, Pierre François, and Ingmar Nopens. 2017. “Concentration-driven Models Revisited : Towards a Unified Framework to Model Settling Tanks in Water Resource Recovery Facilities.” Water Science and Technology 75 (3): 539–551.
APA
Torfs, E., Martí, M. C., Locatelli, F., Balemans, S., Bürger, R., Diehl, S., Laurent, J., et al. (2017). Concentration-driven models revisited : towards a unified framework to model settling tanks in water resource recovery facilities. WATER SCIENCE AND TECHNOLOGY, 75(3), 539–551.
Vancouver
1.
Torfs E, Martí MC, Locatelli F, Balemans S, Bürger R, Diehl S, et al. Concentration-driven models revisited : towards a unified framework to model settling tanks in water resource recovery facilities. WATER SCIENCE AND TECHNOLOGY. 2017;75(3):539–51.
MLA
Torfs, Elena, M Carmen Martí, Florent Locatelli, et al. “Concentration-driven Models Revisited : Towards a Unified Framework to Model Settling Tanks in Water Resource Recovery Facilities.” WATER SCIENCE AND TECHNOLOGY 75.3 (2017): 539–551. Print.
@article{8517255,
  abstract     = {A new perspective on the modelling of settling behaviour in water resource recovery facilities is introduced. The ultimate goal is to describe in a unified way the processes taking place both in primary settling tanks (PSTs) and secondary settling tanks (SSTs) for a more detailed operation and control. First, experimental evidence is provided, pointing out distributed particle properties (such as size, shape, density, porosity, and flocculation state) as an important common source of distributed settling behaviour in different settling unit processes and throughout different settling regimes (discrete, hindered and compression settling). Subsequently, a unified model framework that considers several particle classes is proposed in order to describe distributions in settling behaviour as well as the effect of variations in particle properties on the settling process. The result is a set of partial differential equations (PDEs) that are valid from dilute concentrations, where they correspond to discrete settling, to concentrated suspensions, where they correspond to compression settling. Consequently, these PDEs model both PSTs and SSTs.},
  author       = {Torfs, Elena and Mart{\'i}, M Carmen and Locatelli, Florent and Balemans, Sophie and B{\"u}rger, Raimund and Diehl, Stefan and Laurent, Julien and Vanrolleghem, Peter A and Fran\c{c}ois, Pierre and Nopens, Ingmar},
  issn         = {0273-1223},
  journal      = {WATER SCIENCE AND TECHNOLOGY},
  keyword      = {SIMULATION,compression,discrete settling,primary clarifier,secondary clarifier,settling velocity distribution},
  language     = {eng},
  number       = {3},
  pages        = {539--551},
  title        = {Concentration-driven models revisited : towards a unified framework to model settling tanks in water resource recovery facilities},
  url          = {http://dx.doi.org/10.2166/wst.2016.485},
  volume       = {75},
  year         = {2017},
}

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