Biologically Fe2+ oxidizing fluidized bed reactor performance and controlling of Fe3+ recycle during heap bioleaching: an artificial neural network-based model

Özkaya B., ŞAHİNKAYA E., Nurmi P., Kaksonen A. H. , Puhakka J. A.

BIOPROCESS AND BIOSYSTEMS ENGINEERING, vol.31, no.2, pp.111-117, 2008 (Peer-Reviewed Journal) identifier

  • Publication Type: Article / Article
  • Volume: 31 Issue: 2
  • Publication Date: 2008
  • Doi Number: 10.1007/s00449-007-0153-9
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.111-117


The performance of a biological Fe2+ oxidizing fluidized bed reactor (FBR) was modeled by a popular neural network-back-propagation algorithm over a period of 220 days at 37 degrees C under different operational conditions. A method is proposed for modeling Fe3+ production in FBR and thereby managing the regeneration of Fe3+ for heap leaching application, based on an artificial neural network-back-propagation algorithm. Depending on output value, relevant control strategies and actions are activated, and Fe3+ production in FBR was considered as a critical output parameter. The modeling of effluent Fe3+ concentration was very successful, and an excellent match was obtained between the measured and the predicted concentrations.