A~2/O中精确曝气控制的节能分析与评估
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摘要
采用传统曝气和精确曝气控制A~2/O工艺中的曝气系统。研究结果表明,精确曝气控制模式优于传统曝气,能够精确控制好氧池的DO含量,DO的质量浓度精确到1.9~2.2 mg/L,稳定度DK_2接近100%,正、负偏移率降低到0,离散度大幅度降低。此外,精确曝气与传统曝气相比能耗节约17.3%,且出水TN含量明显降低。
The DO content in aerobic tank of A2/O process was controlled by the traditional aeration and the exact aeration, respectively. The exact aeration was proved to be better than the exact aeration. It showed that, under exact aeration, the variation range, was precise enough to 1.9~2.2 mg/L, the stability(DK_2) approached 100% and the positive and negative deviation ratio of the DO was reduced to 0, respectively. Besides, the dispersion of DO declined by a large margin. Moreover, compared with the traditional aeration, the energy consumption reduced by approximately 17.3% and the TN content of producing water declined obviously, too.
The DO content in aerobic tank of A2/O process was controlled by the traditional aeration and the exact aeration, respectively. The exact aeration was proved to be better than the exact aeration. It showed that, under exact aeration, the variation range, was precise enough to 1.9~2.2 mg/L, the stability(DK_2) approached 100% and the positive and negative deviation ratio of the DO was reduced to 0, respectively. Besides, the dispersion of DO declined by a large margin. Moreover, compared with the traditional aeration, the energy consumption reduced by approximately 17.3% and the TN content of producing water declined obviously, too.
引文
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[3]曹珊,曹秀芹.城市污水处理厂能耗分析及节能降耗途径研究[J].给水排水,2012,39(S1):90-92.
[4]常江,杨岸明,甘一萍,等.城市污水处理厂能耗分析及节能途径[J].中国给水排水,2011,27(4):33-36.
[5]李久安,周秋玲,汪洋.浅谈精确曝气控制技术及其在废水生物处理中的应用[C].广州:2013全国给水排水技术信息网年会暨技术交流会,2013:3.
[6]Ayesa E,De La Sota A,Grau P,et al.Supervisory control strategies for the new WWTP of Galindo-Bilbao:the long run from the conceptual design to the full-scale experimental validation[J].Instrumentation,Control and Automation for Water and Wastewater Treatment and Transport Systems IX,2006,53(4):193-201.
[7]Qin L,Tay J-H,Liu Y.Selection pressure is a driving force of aerobic granulation in sequencing batch reactors[J].Process Biochemistry,2004,39(5):579-584.
[8]汪善全,原媛,孔云华,等.好氧颗粒污泥处理高含盐废水研究[J].环境科学,2008,29(1):145-151.
[9]Ingildesn P,Olsson G,Yuan Z.A hedging point strategy-balancing effluent quality economy and robustness in the control of wastewater treatment plants[J].Water Sci Technol,2002,45:317-324.
[10]夏文辉,刘芬,周雹.污水处理厂曝气控制[C].苏州:2010年全国给水排水技术信息网年会,2010:5.
[11]王一雯,仓炜玮.精确曝气工艺在无锡太湖新城污水处理厂中的应用[J].能源与环境,2011(5):72-73.
[12]杨岸明,常江,孟春霖,等.DO精确控制技术在A2O工艺中的应用研究[J].中国给水排水,2013,29(23):5-7+13.
[13]张荣兵,文洋,鲍海鹏,等.A2/O工艺DO的空间分布及控制品质评价指标研究[J].中国给水排水,2009,25(9):70-74.
[14]张荣兵,鲍海鹏,白雪,等.AVS系统在A2/O工艺稳定运行及节能优化中的应用[J].中国给水排水,2012,28(12):71-74.
[15]Gillot S,De Clercq B,Defour D,et al.Optimization of wastewater treatment plant design and operation using simulation and cost analysis[C].New Orleans:Proceedings of 72nd Annual WEF Conference and Exposition,1999:9-13.