| Simulation and control strategy for the variational influent of WWTP |
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| 作者姓名： | LIU Yan-chen FAN Long SHI Han-chang WANG Zhi-qiang |
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| 作者单位： | State Key Joint Laboratory of Environment Simulation and Pollution Control, Department of Environmental Science and Engineering, TsinghuaUniversity, Beijing 100084, China |
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| 摘 要： | With the development of activated sludge model, the simulation software for the design and operation of wastewater treatment plant （WWTP） was produced and has been widely used. The dynamic change of the quality and flow of influent are major factors causing the unstable operation of wastewater treatment process. As a basic model, ASMI model was used for the simulation of activated sludge process, and double exponential model was selected for the simulation of secondary sedimentation tank. The influences of influent change to the aeration tank and secondary sedimentation tank were investigated, and the relationship among influent change, the quality of effluent and the level of sludge blanket in secondary sedimentation tank was established. On the basis of the simulation results, the operation of the WWTP could be adjusted under the dynamic change of the influent. Furthermore, the controlling strategy combined the feed-forward on the influent flow and the feedback on the level of sludge blanket in the secondary sedimentation tank was studied.
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| 关 键 词： | 废水处理 动力模拟 统计模型 环境控制 WWTP |
| 文章编号： | 1001-0742（2006）01-0062-07 |
| 收稿时间： | 2005-05-11 |
| 修稿时间： | 2005-09-14 |
Simulation and control strategy for the variational influent of WWTP |
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| LIU Yan-chen,FAN Long,SHI Han-chang,WANG Zhi-qiang.Simulation and control strategy for the variational influent of WWTP[J].Journal of Environmental Sciences,2006,18(1):62-68. |
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| Authors: | LIU Yan-chen FAN Long SHI Han-chang and WANG Zhi-qiang |
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| Affiliation: | State Key Joint Laboratory of Environment Simulation and Pollution Control, Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | With the development of activated sludge model, the simulation software for the design and operation of wastewater treatment plant(WWTP) was produced and has been widely used. The dynamic change of the quality and flow of influent are major factors causing the unstable operation of wastewater treatment process. As a basic model, ASM1 model was used for the simulation of activated sludge process, and double exponential model was selected for the simulation of secondary sedimentation tank. The influences of influent change to the aeration tank and secondary sedimentation tank were investigated, and the relationship among influent change, the quality of effluent and the level of sludge blanket in secondary sedimentation tank was established. On the basis of the simulation results, the operation of the WWTP could be adjusted under the dynamic change of the influent. Furthermore, the controlling strategy combined the feed-forward on the influent flow and the feedback on the level of sludge blanket in the secondary sedimentation tank was studied. |
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| Keywords: | modeling dynamic simulation static simulation controlling strategy influent |
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