In the operation of wastewater treatment plants a key variable is dissolved oxygen (DO)
content in the bioreactors. As oxygen is consumed by the microorganisms, more oxygen has …

In the paper, control possibilities for the nitrogen removal process within activated sludge
wastewater treatment plants are discussed. A predictive controller is introduced which aims …

This paper considers the control of dissolved oxygen concentration in a wastewater
treatment plant. Since the system is nonlinear and multivariable in nature, a complex control …

In this work, we discuss the application of multivariable predictive control for the activated
sludge process in a full-scale municipal wastewater treatment plant. Emphasis is given to …

This paper describes a procedure to find the best controlled variables in an economic sense
for the activated sludge process in a wastewater treatment plant, despite the large load …

Wastewater treatment is a problem known to humankind for centuries. The quality of treated
sewage determines the condition of reservoirs around the world. Control of such a complex …

Activated sludge wastewater treatment processes are difficult to be controlled because of
their complex and nonlinear behavior, however, the control of the dissolved oxygen level in …

The paper deals with the design of a predictive controller for a wastewater treatment
process. In the considered process, the wastewater is treated in order to obtain an effluent …

Two-level controllers for dissolved oxygen reference trajectory tracking for activated sludge
processes is proposed and investigated. Both the nutrient and the phosphorous removal …

The application of a multivariable predictive controller to an activated sludge process is
discussed in this work. Emphasis is given to the model identification and the long term …