So the aim of the study is to propose
a new discrete-time control model that will be suitable for
on-line implementation of different control condition by the
PLC in the complex uncertainty system. The discrete-time
dynamic control model enabled the feedforward and feedback
control of the operational condition that was obtained
by the non-line simulation based on the Activated Sludge
Model (ASM) and Computation Fluid Dynamics (CFD). As
simple rules are given for straightforward tuning of this
controller, the control model is easy to operate and suitable
in practice for on-line implementation of control strategy by
the PLC system at a WWTP.