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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.

Authors
  • Irizar, Ion1
  • Roche, Enric2
  • Beltrán, Sergio3
  • Aymerich, Enrique3
  • Esteban-Gutiérrez, Myriam4
  • 1 Ceit, Manuel Lardizabal 15, 20018, Donostia/San Sebastián, Spain; Universidad de Navarra, Tecnun, Manuel Lardizabal 13, 20018, Donostia/San Sebastián, Spain. Electronic address: [email protected] , (Spain)
  • 2 Veolia España, C/ Torrelaguna 60, 28043, Madrid, Spain. , (Spain)
  • 3 Ceit, Manuel Lardizabal 15, 20018, Donostia/San Sebastián, Spain; Universidad de Navarra, Tecnun, Manuel Lardizabal 13, 20018, Donostia/San Sebastián, Spain. , (Spain)
  • 4 Ceit, Manuel Lardizabal 15, 20018, Donostia/San Sebastián, Spain; Universidad de Navarra, Tecnun, Manuel Lardizabal 13, 20018, Donostia/San Sebastián, Spain. Electronic address: [email protected] , (Spain)
Type
Published Article
Journal
Water research
Publication Date
Oct 15, 2018
Volume
143
Pages
479–491
Identifiers
DOI: 10.1016/j.watres.2018.06.055
PMID: 29986256
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

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 m3 installed in a recycled paper mill (RPM). Copyright © 2018 Elsevier Ltd. All rights reserved.

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