Journal article
Increasing cell concentration does not affect specific ferrous iron oxidation rate in a continuously stirred tank bioreactor
Hydrometallurgy, Vol.181, pp.189-194
2018
Abstract
Microbial oxidation of ferrous to ferric iron allows efficient oxidative processing of sulfide minerals under ambient conditions. This study determined the effect of cell concentration of a mixed mesophilic microbial culture on iron oxidation rate, and evaluated if there was a cell concentration threshold that dictates a maximal volumetric iron oxidation rate. A bioreactor with feedback-loading of ferrous media was operated at 30 °C to maintain a redox potential of +480 mV vs. Ag/AgCl at pH of 1.3. A positive and linear correlation (R = 0.955) between the cell concentration (6.8 × 107–7.1 × 109 cells mL−1) and volumetric biological iron oxidation (up to 6.9 g L−1 h−1) was observed. The specific iron oxidation was not affected by cell concentration, and no biocatalytic threshold was observed. This indicated that a high cell concentration can be used to achieve a high volumetric iron oxidation rate, enabling the use of a compact reactor size.
Details
- Title
- Increasing cell concentration does not affect specific ferrous iron oxidation rate in a continuously stirred tank bioreactor
- Authors/Creators
- N.J. Boxall (Author/Creator) - CSIRO Land and WaterK.Y. Cheng (Author/Creator) - CSIRO Land and WaterC.A. du Plessis (Author/Creator) - Lhoist (United Kingdom)D. Collinson (Author/Creator) - Mineral ResourcesC. Morris (Author/Creator) - CSIRO Land and WaterN. Streltsova (Author/Creator) - Vintage94 Pty Ltd, 5 Steeplechase Green, Floreat, WA 6014, AustraliaB. Seaman (Author/Creator) - Newcrest Mining (Australia)D. Seaman (Author/Creator) - Newcrest Mining (Australia)L. Vollert (Author/Creator) - Newcrest Mining (Australia)A.H. Kaksonen (Author/Creator) - CSIRO Land and Water
- Publication Details
- Hydrometallurgy, Vol.181, pp.189-194
- Publisher
- Elsevier BV
- Identifiers
- 991005544054907891
- Copyright
- © 2018 Elsevier B.V.
- Murdoch Affiliation
- School of Engineering and Information Technology
- Language
- English
- Resource Type
- Journal article
Metrics
76 File views/ downloads
33 Record Views
InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Collaboration types
- Industry collaboration
- Domestic collaboration
- International collaboration
- Citation topics
- 7 Engineering & Materials Science
- 7.229 Mineral & Metal Processing
- 7.229.774 Bioleaching
- Web Of Science research areas
- Metallurgy & Metallurgical Engineering
- ESI research areas
- Materials Science