Closed-loop identification and control application for dissolved oxygen concentration in a full-scale coke wastewater treatment plant
SCIE
SCOPUS
- Title
- Closed-loop identification and control application for dissolved oxygen concentration in a full-scale coke wastewater treatment plant
- Authors
- Yoo, CK; Cho, JH; Kwak, HJ; Choi, SK; Chun, HD; Lee, I
- Date Issued
- 2001-01
- Publisher
- I W A PUBLISHING
- Abstract
- The objective of this paper is to apply a closed-loop identification to actual dissolved oxygen control system in the coke wastewater treatment plant. It approximates the dissolved oxygen dynamics to a high order model using the integral transform method and reduces it to the first-order plus time delay (FOPTD) or second-order plus time delay (SOPTD) for the PID controller tuning. To experiment the process identification on the real plant, a simple set-point change of the speed of surface aerator under the closed-loop control without any mode change was used as an activation signal of the identification. The full-scale experimental results show a good identification performance and a good tracking ability for set-point change. As a result of improved control performance, the fluctuation of dissolved oxygen concentration variation has been decreased and the electric power saving has been accomplished.
- Keywords
- autotuning; closed-loop identification; dissolved oxygen; FOPTD model; PID controller; SOPTD model; PID CONTROLLERS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/19526
- DOI
- 10.2166/wst.2001.0426
- ISSN
- 0273-1223
- Article Type
- Article
- Citation
- WATER SCIENCE AND TECHNOLOGY, vol. 43, no. 7, page. 207 - 214, 2001-01
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- There are no files associated with this item.
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