Variable Dissolved Oxygen Set-Points Operation

Abstract

In this chapter the higher level control of a two-level hierarchical structure is proposed using BSM1 as testing plant. The lower level is composed of the MPC $+$ FF controllers described in the previous chapter. The higher level controller has to manipulate S$_{O}$ set-points of the lower level controllers according to S$_{NH,5}$. The biological treatment of S$_{NH}$ and S$_{NO}$ is the result of various processes given by ASM1. When S$_{NH}$ increases, more S$_O$ is needed for nitrification. On the contrary, when S$_{NH}$ decreases, less S$_O$ is required, producing less S$_{NO}$.