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頁籤選單縮合
題名 | Comparison between Model-and pH/ORP-Based Process Control for an AAA System |
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作者 | Kim,Hyunook; Hao,Oliver J.; McAvoy,Thomas J.; | 書刊名 | 淡江理工學刊 |
卷期 | 3:3 2000.11[民89.11] |
頁次 | 頁165-172 |
分類號 | 445.463 |
關鍵詞 | 氮去除; 製程控制; 廢水處理; Nitrogen removal; Process control; pH/ORP; Model; |
語文 | 英文(English) |
英文摘要 | Model-based on-line sensor control schemes in an alternating aerobic/anoxic system for nitrogen removal were applied and compared for system performance. A linear model was developed by simplifying the well known Activated sludge Model No. 1 and incorporated into an optimization scheme. A program was developed to detect control points on the pH and ORP profiles to control aeration duration in an alternating system. Both systems demonstrate good COD (85%) and nitrogen (76-80%) removal efficiencies, with a range of the aeration ratio (aeration cycle time/total cycle time) 0.23 to 0.3. Both systems could save significant aeration energy, in addition to handling the variation of influent nitrogen loading. The model-based optimization approach has some advantages over the pH and ORP sensor control scheme, since the effluent ammonia level can be set by a operator according to the effluent regulation. Conversely, the online sensor based control scheme can be easily applied into a real system, since it does not require calibration or measurements of influent compositions. |
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