Paper Title:
Development of an Extremophilic Iron Oxidizing Consortium and a Fixed Film Bioreactor for Generation of Ferric Lixivient
  Abstract

Acidophilic iron-oxidizing microorganisms are important for both, the environment and for biotechnological applications. Biogeneration of ferric from ferrous iron was studied using an iron-oxidizing consortium developed during polymetallic concentrate bioleaching. A promising iron oxidizing consortium was developed by adaptation and selection, which resulted in bacterial iron oxidation activity under the extreme conditions of 250 g/L ferrous sulphate as initial substrate and 500 g/L ferric sulphate. The development of iron oxidizers improved the iron oxidation rate from 0.019 to as high as 0.6 g/L/h in the shake flask studies with 25 % initial ferrous sulphate in the medium. The consortium showed dominance of Leptospirillum ferrooxidans and Acidithiobacillus ferrooxidans. A fixed film bioreactor was further developed to improve rates of iron oxidation. The developed fixed film bioreactor operated successfully for 200 batches without external addition of inoculum with the highest iron oxidation rate of 1.89 g/L/h. The biological ferric iron generation process provides continuous leaching agent in the form of ferric sulphate, which would be a promising eco-friendly biotechnological process for the indirect extraction of precious metals from sulphidic mineral concentrates.

  Info
Periodical
Advanced Materials Research (Volumes 20-21)
Edited by
Axel Schippers, Wolfgang Sand, Franz Glombitza and Sabine Willscher
Pages
501-504
DOI
10.4028/www.scientific.net/AMR.20-21.501
Citation
S. R. Dave, T.J. Shah, D.R. Tipre, "Development of an Extremophilic Iron Oxidizing Consortium and a Fixed Film Bioreactor for Generation of Ferric Lixivient", Advanced Materials Research, Vols. 20-21, pp. 501-504, 2007
Online since
July 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: L. Svirko, I. Bashtan-Kandybovich, D. Karamanev
Abstract:The process of biological oxidation of ferrous iron by the microorganism Leptospirillum ferriphilum was studied in different types of...
263
Authors: Alexandr G. Bulaev
Chapter 3: Technologies of Bioleaching in Hydrometallurgy
Abstract:The ferrous iron oxidation by mixed culture of moderately thermophilic microorganisms (Sulfobacillus thermosulfidooxidans Sh 10-1 and...
226