Development of Activated Sludge Process Control System By Using Advantages of Mathematical Models

最近的要求活性污泥法inclide引进氮和/或磷去除废水，高性能和紧凑的尺寸，节能操作等这些高度先进的系统需要良好的组织过程控制和监测，这反过来又提高了活性污泥法的结构化模拟模型的需要。本研究旨在开发一种基于结构化数学模型的活性污泥控制系统。其中，（1）研究了过程控制策略，开发了实用的过程模拟程序;（2）开发了连接过程控制硬件和活性污泥法数学模型的人机界面。在此基础上，建立了基于黑板概念的过程控制系统，将在线数据、实验室分析结果、快速专家模型和数学仿真模型集成在一起，对过程进行监控。该系统的有效性进行了测试，对高负荷脱氮工艺。此外，通过引入活性污泥絮体结构，开发了新的模拟程序。通过改进，对硝化-反硝化过程的模拟得到了较好的结果。

Recent demands for activated sludge processes inclide introduction of nitrogen and/or phosphorus removal from wastewaters, high performance and compact size, energy saving operation, etc. These highly advanced systems require well organized process control and monitoring, which in turn raise the need for a structured simulation model of activated sludge process. The present study aimed at developing an activated sludge control system based on structured mathematical models. Especially, (1) investigation of process control strategy resulting in development of a practical program for process simulation, and(2) development of man-machine interface which connect process control hardwares and the mathmatical model of activated sludge process, were atempted. As the result, a procerss control system based on the blackboard concept was constructed, in which on-line data, analytical results from chmical laboratory, fassy-expert model and mathematical simulation model are integrated to monitor and control the process. The effectiveness of the system was tested against a high loading nitrogen removal process. In addition, a new simulation program was developed by introducing activated sludge floc structure. By this modification, a better simulation results were obtained for nitrification-denitrification processes.