A controller directs the operation of an air pollution control (APC)
system performing a process, having one or more controllable operating
parameters, to control emissions of a pollutant. An interface receives
financial data associated with the operation of the APC system. A control
processor determines a target set point of each of at least one of the
one or more controllable operating parameters that will maximize profits
or minimize losses from the operation of the APC system, based on the
received financial data. The control processor also directs control of
each of the at least one controllable operating parameter based on the
determined target set point for that parameter.