Abstract
Process data are acquired and used to control treatment plants in order to optimize sewage treatment. The basis of any automation is operationally safe measuring instruments. Practical experience with treatment plant automation has shown that presently available analytical possibilities do not allow the waste water treatment process to be depicted in such a way that a comprehensive waste water treatment model could be derived from these. Automation of the operation of waste water treatment plants is, therefore, usually limited to the use of individual, appropriate control systems and control loops for specific process segments. Data acquisition and processing is predominantly used in sewage treatment plants for process control, emphasis being placed on operation, monitoring and recording of the process. Decentralized automation systems by means of which relatively complex monitoring tasks are carried out by intelligent substations without causing a load on the central system, have proven effective.
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