# A simple and efficient feedback control strategy for wastewater denitrification

## TL;DR

This paper introduces a model-free feedback control strategy for wastewater denitrification, combining intelligent control with open-loop knowledge-based control to improve performance over traditional open-loop methods.

## Contribution

A novel model-free control approach with an intelligent controller and open-loop knowledge-based control for better wastewater denitrification management.

## Key findings

- Improved control performance demonstrated through computer simulations.
- Effective regulation of multiple output variables with a single input.
- Overcoming limitations of open-loop feedforward control.

## Abstract

Due to severe mathematical modeling and calibration difficulties open-loop feedforward control is mainly employed today for wastewater denitrification, which is a key ecological issue. In order to improve the resulting poor performances a new model-free control setting and its corresponding "intelligent" controller are introduced. The pitfall of regulating two output variables via a single input variable is overcome by introducing also an open-loop knowledge-based control deduced from the plant behavior. Several convincing computer simulations are presented and discussed.