Grey-box modelling is a new methodology which can be used for obtainin
g important information from online data. This information can be used
in control for optimizing the performance of the sewer system as well
as the treatment plant during rain events. The objective is to minimi
ze the effect from discharges on the receiving water without increasin
g the risk of flooding. This is the concept used in the control part o
f the EUREKA-financed project MUST. Copyright (C) 1996 IAWQ. Published
by Elsevier Science Ltd.