Modeling of full-scale drinking water treatment plants with embedded plant control

摘要

In general, the available control actions in drinking water treatment plants are not directly relatednto the process objectives for water quality. Model based optimization of operation of a drinkingnwater treatment plant by direct control of water quality objectives is discussed. Plant control withnPID controllers is embedded in the model of a drinking water treatment plant and the ozonationnprocess in the plant is used as a case study. It is concluded that direct control of water qualitynobjectives, e.g. Giardia inactivation for ozonation, can largely reduce uncertainty and variationnin process performance and leads to improvements of drinking water quality. In the discussedncase it led to less bromate formation at the same disinfection capacity. Embedded plant controlnwith PID controllers in the model of drinking water treatment plants through the use of codenfor writing control functionality has a large potential for model based optimization of operation.