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Modelling the activated sludge flocculation process combining laser light diffraction particle sizing and population balance modelling (PBM)

Author
Organization
Abstract
A technique based on laser light diffraction is shown to be successful in collecting on-line experimental data. Time series of floc size distributions (FSD) under different shear rates (G) and calcium additions were collected. The steady state mass mean diameter decreased with increasing shear rate G and increased when calcium additions exceeded 8 mg/l. A so-called population balance model (PBM) was used to describe the experimental data, This kind of model describes both aggregation and breakage through birth and death terms. A discretised PBM was used since analytical solutions of the integro-partial differential equations are non-existing. Despite the complexity of the model, only 2 parameters need to be estimated: the aggregation rate and the breakage rate. The model seems, however, to lack flexibility. Also, the description of the floc size distribution (FSD) in time is not accurate.
Keywords
floc size distribution, activated sludge flocculation, laser light diffraction, population balance modelling, SETTLING TANKS, FLOC SIZE, SHEAR, DENSITY

Citation

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Chicago
Nopens, Ingmar, CA Biggs, Bob De Clercq, Ruxandra Govoreanu, BM Wilen, P Lant, and Peter Vanrolleghem. 2002. “Modelling the Activated Sludge Flocculation Process Combining Laser Light Diffraction Particle Sizing and Population Balance Modelling (PBM).” Water Science and Technology 45 (6): 41–49.
APA
Nopens, I., Biggs, C., De Clercq, B., Govoreanu, R., Wilen, B., Lant, P., & Vanrolleghem, P. (2002). Modelling the activated sludge flocculation process combining laser light diffraction particle sizing and population balance modelling (PBM). WATER SCIENCE AND TECHNOLOGY, 45(6), 41–49. Presented at the 5th Seminar on Activated Sludge Modelling.
Vancouver
1.
Nopens I, Biggs C, De Clercq B, Govoreanu R, Wilen B, Lant P, et al. Modelling the activated sludge flocculation process combining laser light diffraction particle sizing and population balance modelling (PBM). WATER SCIENCE AND TECHNOLOGY. 2002;45(6):41–9.
MLA
Nopens, Ingmar, CA Biggs, Bob De Clercq, et al. “Modelling the Activated Sludge Flocculation Process Combining Laser Light Diffraction Particle Sizing and Population Balance Modelling (PBM).” WATER SCIENCE AND TECHNOLOGY 45.6 (2002): 41–49. Print.
@article{157756,
  abstract     = {A technique based on laser light diffraction is shown to be successful in collecting on-line experimental data. Time series of floc size distributions (FSD) under different shear rates (G) and calcium additions were collected. The steady state mass mean diameter decreased with increasing shear rate G and increased when calcium additions exceeded 8 mg/l. A so-called population balance model (PBM) was used to describe the experimental data, This kind of model describes both aggregation and breakage through birth and death terms. A discretised PBM was used since analytical solutions of the integro-partial differential equations are non-existing. Despite the complexity of the model, only 2 parameters need to be estimated: the aggregation rate and the breakage rate. The model seems, however, to lack flexibility. Also, the description of the floc size distribution (FSD) in time is not accurate.},
  author       = {Nopens, Ingmar and Biggs, CA and De Clercq, Bob and Govoreanu, Ruxandra and Wilen, BM and Lant, P and Vanrolleghem, Peter},
  issn         = {0273-1223},
  journal      = {WATER SCIENCE AND TECHNOLOGY},
  keyword      = {floc size distribution,activated sludge flocculation,laser light diffraction,population balance modelling,SETTLING TANKS,FLOC SIZE,SHEAR,DENSITY},
  language     = {eng},
  location     = {Kollekolle, Denmark},
  number       = {6},
  pages        = {41--49},
  title        = {Modelling the activated sludge flocculation process combining laser light diffraction particle sizing and population balance modelling (PBM)},
  url          = {http://www.iwaponline.com/wst/04506/wst045060041.htm},
  volume       = {45},
  year         = {2002},
}

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