Model-based design of a software sensor for real-time diagnosis of the stability conditions in high-rate anaerobic reactors - Full-scale application to Internal Circulation technology

Autores: Irizar Picón, Juan (Autor de correspondencia); Roche, E. ; Beltrán Calaff, Sergio; Aymerich Soler, Enrique; Esteban Gutiérrez, Myriam (Autor de correspondencia)
Título de la revista: WATER RESEARCH
ISSN: 0043-1354
Volumen: 143
Páginas: 479 - 491
Fecha de publicación: 2018
Lugar: WOS
Internal Circulation (IC) anaerobic systems are especially suitable when plant designs that involve both small footprints and high organic loading rates (>25 kg COD m(-3) d(-1)) are required. However, given that operating anaerobic processes at high organic loads increases their vulnerability to external disturbances, real-time indicators of the stability conditions become particularly pertinent for IC reactors. This paper addresses the design and full-scale validation of a software sensor that uses only feeding flow-rate and biogas flow-rate measurements to classify the operating conditions of the reactor as "strongly", "moderately" or "weakly" stable. A simulation-based procedure was used to design the software sensor and configure its parameters. Then, the performance of the software sensor was tested under real conditions in a full-scale IC reactor of 1679 m(3) installed in a recycled paper mill (RPM). (C) 2018 Elsevier Ltd. All rights reserved.