THE ON-LINE COMPARISON OF A MEASURED VS CALCULATED OXYGEN MASS TRANSFER COEFFICIENT - A USEFUL PARAMETER FOR FAULT DIAGNOSIS

摘要

The equations for the derivation of a measured and calculated oxygen transfer coefficient are briefly described. It is then shown how an on-line comparison of these two values can be used to obtain process information for run optimisation, instrument fault detection, overdosing of reagents such as antifoam and irregular changes of broth rheology. A single example showing the unambiguous detection of fouling on a dissolved oxygen probe is finally presented and discussed.