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PubMed · 11385849

Closed-loop identification and control application for dissolved oxygen concentration in a full-scale coke wastewater treatment plant.

C K Yoo·J H Cho·H J Kwak·S K Choi·H D Chun·I Lee
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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.

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BiomassCoalComputer SimulationEquipment DesignIndustrial WasteModels, TheoreticalOxygenSoftwareWaste Disposal, FluidJournal ArticleResearch Support, Non-U.S. Gov't

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C K Yoo, J H Cho, H J Kwak, S K Choi, H D Chun, I Lee. 2001. Closed-loop identification and control application for dissolved oxygen concentration in a full-scale coke wastewater treatment plant.. https://pubmed.ncbi.nlm.nih.gov/11385849/

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