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Improving oxygen concentration control in activated sludge process with estimation of respiration and scheduling control

Gerksic, S; Vrecko, D and Hvala, N (2006) In Water Science and Technology 53(4-5). p.283-291
Abstract
The paper presents an efficient and simple model-based method of on-line estimation of respiration from the current values of dissolved oxygen concentration and airflow signals. Fast estimation of respiration is important because respiration appears as the most important disturbance signal in the control of dissolved oxygen concentration, and could therefore be used for improving control efficiency. A parameter scheduling PI (proportional and integral) control scheme is proposed, where the estimated respiration signal is used for scheduling of the PI controller parameters, by using local linearization of the process dynamics. The performance of the scheduling controller is compared to a conventional PI controller in simulation using the... (More)
The paper presents an efficient and simple model-based method of on-line estimation of respiration from the current values of dissolved oxygen concentration and airflow signals. Fast estimation of respiration is important because respiration appears as the most important disturbance signal in the control of dissolved oxygen concentration, and could therefore be used for improving control efficiency. A parameter scheduling PI (proportional and integral) control scheme is proposed, where the estimated respiration signal is used for scheduling of the PI controller parameters, by using local linearization of the process dynamics. The performance of the scheduling controller is compared to a conventional PI controller in simulation using the COST simulation benchmark, and experimentally on an activated sludge process pilot plant. (Less)
Please use this url to cite or link to this publication:
author
publishing date
type
Contribution to journal
publication status
published
subject
in
Water Science and Technology
volume
53
issue
4-5
pages
283 - 291
publisher
IWA Publishing
external identifiers
  • Scopus:33646717309
ISSN
0273-1223
DOI
10.2166/wst.2006.133
language
English
LU publication?
no
id
453f49c9-51b2-403c-939a-503676163995 (old id 609696)
date added to LUP
2007-12-01 11:35:51
date last changed
2016-11-15 09:23:12
@misc{453f49c9-51b2-403c-939a-503676163995,
  abstract     = {The paper presents an efficient and simple model-based method of on-line estimation of respiration from the current values of dissolved oxygen concentration and airflow signals. Fast estimation of respiration is important because respiration appears as the most important disturbance signal in the control of dissolved oxygen concentration, and could therefore be used for improving control efficiency. A parameter scheduling PI (proportional and integral) control scheme is proposed, where the estimated respiration signal is used for scheduling of the PI controller parameters, by using local linearization of the process dynamics. The performance of the scheduling controller is compared to a conventional PI controller in simulation using the COST simulation benchmark, and experimentally on an activated sludge process pilot plant.},
  author       = {Gerksic, S and Vrecko, D and Hvala, N},
  issn         = {0273-1223},
  language     = {eng},
  number       = {4-5},
  pages        = {283--291},
  publisher    = {ARRAY(0xcf75128)},
  series       = {Water Science and Technology},
  title        = {Improving oxygen concentration control in activated sludge process with estimation of respiration and scheduling control},
  url          = {http://dx.doi.org/10.2166/wst.2006.133},
  volume       = {53},
  year         = {2006},
}