Advanced

Automatic control of the effluent turbidity from a chemically enhanced primary treatment with microsieving

Väänänen, J. LU ; Memet, S.; Gunther, Torsten; Lilja, M. LU ; Cimbritz, M. LU and La Cour Jansen, J. LU (2017) In Water Science and Technology 76(7). p.1770-1780
Abstract

For chemically enhanced primary treatment (CEPT) with microsieving, a feedback proportional integral controller combined with a feedforward compensator was used in large pilot scale to control effluent water turbidity to desired set points. The effluent water turbidity from the microsieve was maintained at various set points in the range 12-80 NTU basically independent for a number of studied variations in influent flow rate and influent wastewater compositions. Effluent turbidity was highly correlated with effluent chemical oxygen demand (COD). Thus, for CEPT based on microsieving, controlling the removal of COD was possible. Thereby incoming carbon can be optimally distributed between biological nitrogen removal and anaerobic... (More)

For chemically enhanced primary treatment (CEPT) with microsieving, a feedback proportional integral controller combined with a feedforward compensator was used in large pilot scale to control effluent water turbidity to desired set points. The effluent water turbidity from the microsieve was maintained at various set points in the range 12-80 NTU basically independent for a number of studied variations in influent flow rate and influent wastewater compositions. Effluent turbidity was highly correlated with effluent chemical oxygen demand (COD). Thus, for CEPT based on microsieving, controlling the removal of COD was possible. Thereby incoming carbon can be optimally distributed between biological nitrogen removal and anaerobic digestion for biogas production. The presented method is based on common automation and control strategies; therefore fine tuning and optimization for specific requirements are simplified compared to model-based dosing control.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Coagulation, Control, Flocculation, Microsieving, Turbidity
in
Water Science and Technology
volume
76
issue
7
pages
11 pages
publisher
IWA Publishing
external identifiers
  • scopus:85030860284
ISSN
0273-1223
DOI
10.2166/wst.2017.358
language
English
LU publication?
yes
id
a902bc5a-23ae-4e23-8f4c-bcf5987f913f
date added to LUP
2017-10-18 08:03:57
date last changed
2017-10-19 03:00:02
@article{a902bc5a-23ae-4e23-8f4c-bcf5987f913f,
  abstract     = {<p>For chemically enhanced primary treatment (CEPT) with microsieving, a feedback proportional integral controller combined with a feedforward compensator was used in large pilot scale to control effluent water turbidity to desired set points. The effluent water turbidity from the microsieve was maintained at various set points in the range 12-80 NTU basically independent for a number of studied variations in influent flow rate and influent wastewater compositions. Effluent turbidity was highly correlated with effluent chemical oxygen demand (COD). Thus, for CEPT based on microsieving, controlling the removal of COD was possible. Thereby incoming carbon can be optimally distributed between biological nitrogen removal and anaerobic digestion for biogas production. The presented method is based on common automation and control strategies; therefore fine tuning and optimization for specific requirements are simplified compared to model-based dosing control.</p>},
  author       = {Väänänen, J. and Memet, S. and Gunther, Torsten and Lilja, M. and Cimbritz, M. and La Cour Jansen, J.},
  issn         = {0273-1223},
  keyword      = {Coagulation,Control,Flocculation,Microsieving,Turbidity},
  language     = {eng},
  month        = {10},
  number       = {7},
  pages        = {1770--1780},
  publisher    = {IWA Publishing},
  series       = {Water Science and Technology},
  title        = {Automatic control of the effluent turbidity from a chemically enhanced primary treatment with microsieving},
  url          = {http://dx.doi.org/10.2166/wst.2017.358},
  volume       = {76},
  year         = {2017},
}