INTEGRATION OF ON-LINE INSTRUMENTS IN THE PRACTICAL OPERATION OF THE KLAGSHAMN WASTEWATER TREATMENT PLANT
The Klagshamn wastewater treatment plant is operated with extended BOD, phosphorus and nitrogen removal. A high and stable removal of nitrogen is reached with a process configuration based on pre-precipitation and the use of an external carbon source in a single sludge post-denitrification process. The detention time in the bioreactor is about 7 hours. The comparatively short detention time in combination with the process structure provides a framework where on-line instruments are useful for the overall operation of the plant. The on-line instruments require service and maintenance in order to function properly. Furthermore, some sort of evaluation procedure is needed if they are to be used in a more decisive manner. At the Klagshamn plant, the on-line instruments are useful for process fault detecting and process control. The instruments related to the operation of the bioreactor are primarily used for monitoring the process. “Complete abstract not presented.”