Implementació d'eines avançades de control per a l'eliminació de nitrogen i optimització dels costos energètics a l'EDAR de la Vall del Ges

Abstract

WWTP present two issues: 1) Get adequate depuration performance; 2) Do it with minimal costs. There are many strategies that can be applied to achieve these requirements, but they cannot be applied indiscriminately. In this thesis, we study the WWTP of “La Vall del Ges”. This Orbal plant operates to efficiently remove phosphorus (by chemical precipitation) and nitrogen (by biological treatment). With the objective of maintaining nitrogen removal performance and reducing aeration energy costs, various strategies have been implemented in order to solve the above mentioned issues. This work presents two significant innovations for the development of WWTP control strategies: It has been proposed a control strategy capable to continuously adapt the set points of NH4+ concentrations, depending on the plant tariff system, and it has been included in the simulations an inspector module, capable to quantify the risk of violations that may occur, depending on the control system used