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Impact of reactive settler models on simulated WWTP performance

Gernaey, K V ; Jeppsson, Ulf LU ; Batstone, D J and Ingildsen, P (2006) In Water Science and Technology 53(1). p.159-167
Abstract
Including a reactive settler model in a wastewater treatment plant model allows representation of the biological reactions taking place in the sludge blanket in the settler, something that is neglected in many simulation studies. The idea of including a reactive settler model is investigated for an ASM1 case study. Simulations with a whole plant model including the non-reactive Takacs settler model are used as a reference, and are compared to simulation results considering two reactive settler models. The first is a return sludge model block removing oxygen and a user-defined fraction of nitrate, combined with a non-reactive Takacs settler. The second is a fully reactive ASM1 Takacs settler model. Simulations with the ASM1 reactive settler... (More)
Including a reactive settler model in a wastewater treatment plant model allows representation of the biological reactions taking place in the sludge blanket in the settler, something that is neglected in many simulation studies. The idea of including a reactive settler model is investigated for an ASM1 case study. Simulations with a whole plant model including the non-reactive Takacs settler model are used as a reference, and are compared to simulation results considering two reactive settler models. The first is a return sludge model block removing oxygen and a user-defined fraction of nitrate, combined with a non-reactive Takacs settler. The second is a fully reactive ASM1 Takacs settler model. Simulations with the ASM1 reactive settler model predicted a 15.3% and 7.4% improvement of the simulated N removal performance, for constant (steady-state) and dynamic influent conditions respectively. The oxygen/nitrate return sludge model block predicts a 10% improvement of N removal performance under dynamic conditions, and might be the better modelling option for ASM1 plants: it is computationally more efficient and it will not overrate the importance of decay processes in the settler. (Less)
Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
wastewater, sedimentation, ASM1, reactive settler, activated sludge, modelling
in
Water Science and Technology
volume
53
issue
1
pages
159 - 167
publisher
IWA Publishing
external identifiers
  • pmid:16532746
  • wos:000236011600019
  • scopus:33644624753
ISSN
0273-1223
DOI
10.2166/wst.2006.018
language
English
LU publication?
yes
id
1e39a816-6c11-4dd6-8086-2e55b0960942 (old id 415891)
date added to LUP
2016-04-01 16:02:35
date last changed
2020-09-02 02:34:51
@article{1e39a816-6c11-4dd6-8086-2e55b0960942,
  abstract     = {Including a reactive settler model in a wastewater treatment plant model allows representation of the biological reactions taking place in the sludge blanket in the settler, something that is neglected in many simulation studies. The idea of including a reactive settler model is investigated for an ASM1 case study. Simulations with a whole plant model including the non-reactive Takacs settler model are used as a reference, and are compared to simulation results considering two reactive settler models. The first is a return sludge model block removing oxygen and a user-defined fraction of nitrate, combined with a non-reactive Takacs settler. The second is a fully reactive ASM1 Takacs settler model. Simulations with the ASM1 reactive settler model predicted a 15.3% and 7.4% improvement of the simulated N removal performance, for constant (steady-state) and dynamic influent conditions respectively. The oxygen/nitrate return sludge model block predicts a 10% improvement of N removal performance under dynamic conditions, and might be the better modelling option for ASM1 plants: it is computationally more efficient and it will not overrate the importance of decay processes in the settler.},
  author       = {Gernaey, K V and Jeppsson, Ulf and Batstone, D J and Ingildsen, P},
  issn         = {0273-1223},
  language     = {eng},
  number       = {1},
  pages        = {159--167},
  publisher    = {IWA Publishing},
  series       = {Water Science and Technology},
  title        = {Impact of reactive settler models on simulated WWTP performance},
  url          = {http://dx.doi.org/10.2166/wst.2006.018},
  doi          = {10.2166/wst.2006.018},
  volume       = {53},
  year         = {2006},
}