کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
152955 | 456513 | 2009 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Supervisory control system to enhance partial nitrification in an activated sludge reactor Supervisory control system to enhance partial nitrification in an activated sludge reactor](/preview/png/152955.png)
This work proposes a supervisory control system based on an optimization layer to calculate the optimum pH and dissolved oxygen (DO) set-points for the SISO controller, maintaining the process at stable partial nitrification. Takagi–Sugeno fuzzy multimodels were implemented to estimate ammonium degradation and nitrite accumulation from on-line DO and pH values, and updated using off-line measurements. An activated sludge reactor was operated successfully over 115 consecutive days with the supervisory control system, achieving ammonium degradation and nitrite accumulation values higher than 95% and 80%, respectively. The on-line estimates of the multimodels showed a prediction error of less than 7% at steady state operation, and reflected the tendencies shown in experiment to be caused by changes in pH value and DO concentration.
Journal: Chemical Engineering Journal - Volume 145, Issue 3, 1 January 2009, Pages 453–460