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Control of Wastewater Treatment Removing Phosphate Based on ASM No. 2 Simplified Model and Investigation of Luxury Uptake Limitation  

Kim, Shin-Geol (Department of Environmental Engineering, University of Seoul)
Choi, In-Su (Department of Environmental Engineering, University of Seoul)
Koo, Ja-Yong (Department of Environmental Engineering, University of Seoul)
Publication Information
Journal of Korean Society of Environmental Engineers / v.30, no.2, 2008 , pp. 181-189 More about this Journal
Abstract
Phosphate is the limiting factor leading to the eutrophication in nature and has been usually removed by the luxury uptake of PAOs(Phosphate accumulating organisms). The purpose of this study was the control of wastewater treatment removing phosphorus. The control of wastewater treatment process was performed by optimal and adaptive control. They were performed as followings. Firstly the inflow phosphate concentration was measured and the optimal aeration time was calculated by simplified ASM No. 2 for the phosphate to be 1.0 mg/L in effluent. It was optimal control. But when the phosphate concentration in effluent was not 1.0 mg/L, adaptive control was necessary to coincide the objective of control with real value. Then it was performed as the objective phosphate concentration in effluent was changed according to calculation of errors and it was adaptive control. The wastewater treatment process had been controlled by them for about one month. The range of phosphate concentration in effluent 0.2$\sim$3.2 mg/L and the average of it was 1.0 mg/L. The limitation of luxury uptake occurred two times while wastewater treatment process was running. After the analysis of laboratory tests, we knew the reasons were the shortage of ammonia nitrogen and the excessive aeration.
Keywords
Adaptive Control; Limitation of Luxury Uptake; Optimal Control; Simplified ASM No. 2;
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Times Cited By KSCI : 1  (Citation Analysis)
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