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Improved nutrient removal using in situ continuous on-line sensors with short response time

Ingildsen, P and Wendelboe, H LU (2003) In Water Science and Technology 48(1). p.95-102
Abstract
Nutrient sensors that can be located directly in the activated sludge processes are gaining in number at wastewater treatment plants. The in situ location of the sensors means that they can be located close to the processes that they aim to control and hence are perfectly suited for automatic process control. Compared to the location of automatic analysers in the effluent from the sedimentation reactors the in situ location means a large reduction in the response time. The settlers typically work as a first-order delay on the signal with a retention time in the range of 4-12 hours depending on the size of the,settlers. Automatic process control of the nitrogen and phosphorus removal processes means that considerable improvements in the... (More)
Nutrient sensors that can be located directly in the activated sludge processes are gaining in number at wastewater treatment plants. The in situ location of the sensors means that they can be located close to the processes that they aim to control and hence are perfectly suited for automatic process control. Compared to the location of automatic analysers in the effluent from the sedimentation reactors the in situ location means a large reduction in the response time. The settlers typically work as a first-order delay on the signal with a retention time in the range of 4-12 hours depending on the size of the,settlers. Automatic process control of the nitrogen and phosphorus removal processes means that considerable improvements in the performance of aeration, internal recirculation, carbon dosage and phosphate precipitation dosage can be reached by using a simple control structure as well as simple PID controllers. The performance improvements can be seen in decreased energy and chemicals consumption and less variation in effluent concentrations of ammonium, total nitrogen and phosphate. Simple control schemes are demonstrated for the pre-denitrification and the post precipitation,system by means of full-scale plant experiments and model simulations. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
nutrient sensors, nutrient removal, in-situ, control and automation, full-scale control implementation
in
Water Science and Technology
volume
48
issue
1
pages
95 - 102
publisher
IWA Publishing
external identifiers
  • wos:000185292800012
  • pmid:12926625
  • scopus:0041560931
ISSN
0273-1223
language
English
LU publication?
yes
id
3d2a8d7e-4e43-4aa4-8a18-3c6130d4b8d9 (old id 300725)
alternative location
http://www.iwaponline.com/wst/04801/wst048010095.htm
date added to LUP
2007-09-13 12:34:51
date last changed
2018-01-07 09:38:23
@article{3d2a8d7e-4e43-4aa4-8a18-3c6130d4b8d9,
  abstract     = {Nutrient sensors that can be located directly in the activated sludge processes are gaining in number at wastewater treatment plants. The in situ location of the sensors means that they can be located close to the processes that they aim to control and hence are perfectly suited for automatic process control. Compared to the location of automatic analysers in the effluent from the sedimentation reactors the in situ location means a large reduction in the response time. The settlers typically work as a first-order delay on the signal with a retention time in the range of 4-12 hours depending on the size of the,settlers. Automatic process control of the nitrogen and phosphorus removal processes means that considerable improvements in the performance of aeration, internal recirculation, carbon dosage and phosphate precipitation dosage can be reached by using a simple control structure as well as simple PID controllers. The performance improvements can be seen in decreased energy and chemicals consumption and less variation in effluent concentrations of ammonium, total nitrogen and phosphate. Simple control schemes are demonstrated for the pre-denitrification and the post precipitation,system by means of full-scale plant experiments and model simulations.},
  author       = {Ingildsen, P and Wendelboe, H},
  issn         = {0273-1223},
  keyword      = {nutrient sensors,nutrient removal,in-situ,control and automation,full-scale control implementation},
  language     = {eng},
  number       = {1},
  pages        = {95--102},
  publisher    = {IWA Publishing},
  series       = {Water Science and Technology},
  title        = {Improved nutrient removal using in situ continuous on-line sensors with short response time},
  volume       = {48},
  year         = {2003},
}