PILOT EXPERIMENTS USED FOR DESIGN OF ACTIVATED SLUDGE SYSTEMS – SOME POSSIBILITIES AND PITFALLS / Pilotförsök som grund for dimensionering – nagra fällor och mojiigheter
Two pilot plant set-ups, used to obtain information on a denitrifying non-nitrifying activated sludge system and its usefulness in full-scale, are compared and evaluated. The pilot plant data are used to illustrate effects of simplification of a complex problem in pilot scale. A simple pilot plant supplied with a constant How of wastewater was useful in order to obtain some kinetic data and give a general idea of the usefulness of the process. However, unwanted systematic effects were caused by the varying quality of the wastewater. When predicting the results of full-scale operation a controlled pilot plant where full-scale operation was simulated was found to be superior. In this system a reasonable security against unexpected systematic effects remaining concealed could be obtained.