A crucial factor for the quality and results of the on-line simulation of a
municipal sewage treatment system is the provision of the requisite data i
n adequate quality and density, Since the measured data cannot be incorpora
ted in a simulation model without prior processing, it should be prepared i
n such a way that it can be converted to the model-related input quantities
. If individual input measuring signals fail, substitute value concepts mus
t be developed which are based on the remaining information. With this it i
s possible to ensure the continuous provision of data. Various approaches a
re possible in seeking a solution to this problem. At the Wupperverband a d
etailed programme of investigation on the subject area of the processing of
inflow data is being implemented as a component of future on-line simulati
on at Wuppertal-Buchenhofen STP.