Evaluation of Long-Term Post Process Inactivation of Bioleaching Microorganisms

Malin Bomberg; Hanna Miettinen; Margareta Wahlström; Tommi Kaartinen; Sarita Ahoranta; Aino Maija Lakaniemi; Päivi Kinnunen

doi:10.4028/www.scientific.net/SSP.262.57

Evaluation of Long-Term Post Process Inactivation of Bioleaching Microorganisms

Malin Bomberg^*, Hanna Miettinen, Margareta Wahlström, Tommi Kaartinen, Sarita Ahoranta, Aino Maija Lakaniemi, Päivi Kinnunen

^*Corresponding author for this work

Tampere University of Technology (TUT)

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

3 Citations (Scopus)

Abstract

The H2020 BioMOre project (www.biomore.info, Grant Agreement #642456) tests the feasibility of in-situ bioleaching of copper in deep subsurface deposits in the Rudna Mine, Poland. Copper is leached using biologically produced ferric iron solution, which is recycled back to the in-situ reactor after re-oxidation by iron-oxidizing bacteria (IOB). From a post operational point of view, it is important that the biological processes applied during the operation can be controlled and terminated. Our goal was to determine the possibility to use natural saline mine water for the inactivation of introduced IOB remaining in the in-situ reactor after completion of the leaching process of the Kupferschiefer ore. Aerobic and anaerobic microcosms containing acid-leached (pH 2) sandstone or black shale from the Kupferschiefer in the Rudna mine were further leached with the effluent from an iron-oxidizing bioreactor, at a temperature of 30°C, for 10 days, to simulate in-situ leaching. After the removal of the iron solution, residing IOB were inactivated by filling the microcosms with saline water (65 g L ^-1 Cl ^-) originating from the mine. The saline water completely inactivated the IOB and the naturally occurring saline water of the mine can be used for long-term post process inactivation of bioleaching microorganisms.

Original language	English
Title of host publication	22nd International Biohydrometallurgy Symposium
Editors	Sabrina Hedrich, Kathrin Rübberdt, Franz Glombitza, Wolfgang Sand, Axel Schippers, Mario Vera Véliz, Sabine Willscher
Pages	57-60
DOIs	https://doi.org/10.4028/www.scientific.net/SSP.262.57
Publication status	Published - 1 Jan 2017
MoE publication type	A4 Article in a conference publication

Publication series

Series	Solid State Phenomena
Volume	262
ISSN	1012-0394

Funding

Suvi Aalto (VTT) is thanked for excellent laboratory assistance. This project has received funding from the European Union’s Horizon 2020 Research and Innovation program under Grant Agreement # 642456, BioMOre project.

Keywords

In situ bioleaching
inactivation
iron-oxidizing bacteria

Access to Document

10.4028/www.scientific.net/SSP.262.57

Cite this

Bomberg, M., Miettinen, H., Wahlström, M., Kaartinen, T., Ahoranta, S., Lakaniemi, A. M., & Kinnunen, P. (2017). Evaluation of Long-Term Post Process Inactivation of Bioleaching Microorganisms. In S. Hedrich, K. Rübberdt, F. Glombitza, W. Sand, A. Schippers, M. V. Véliz, & S. Willscher (Eds.), 22nd International Biohydrometallurgy Symposium (pp. 57-60) https://doi.org/10.4028/www.scientific.net/SSP.262.57

Bomberg, Malin ; Miettinen, Hanna ; Wahlström, Margareta et al. / Evaluation of Long-Term Post Process Inactivation of Bioleaching Microorganisms. 22nd International Biohydrometallurgy Symposium. editor / Sabrina Hedrich ; Kathrin Rübberdt ; Franz Glombitza ; Wolfgang Sand ; Axel Schippers ; Mario Vera Véliz ; Sabine Willscher. 2017. pp. 57-60 (Solid State Phenomena, Vol. 262).

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title = "Evaluation of Long-Term Post Process Inactivation of Bioleaching Microorganisms",

abstract = "The H2020 BioMOre project (www.biomore.info, Grant Agreement #642456) tests the feasibility of in-situ bioleaching of copper in deep subsurface deposits in the Rudna Mine, Poland. Copper is leached using biologically produced ferric iron solution, which is recycled back to the in-situ reactor after re-oxidation by iron-oxidizing bacteria (IOB). From a post operational point of view, it is important that the biological processes applied during the operation can be controlled and terminated. Our goal was to determine the possibility to use natural saline mine water for the inactivation of introduced IOB remaining in the in-situ reactor after completion of the leaching process of the Kupferschiefer ore. Aerobic and anaerobic microcosms containing acid-leached (pH 2) sandstone or black shale from the Kupferschiefer in the Rudna mine were further leached with the effluent from an iron-oxidizing bioreactor, at a temperature of 30°C, for 10 days, to simulate in-situ leaching. After the removal of the iron solution, residing IOB were inactivated by filling the microcosms with saline water (65 g L -1 Cl -) originating from the mine. The saline water completely inactivated the IOB and the naturally occurring saline water of the mine can be used for long-term post process inactivation of bioleaching microorganisms. ",

keywords = "In situ bioleaching, inactivation, iron-oxidizing bacteria",

author = "Malin Bomberg and Hanna Miettinen and Margareta Wahlstr{\"o}m and Tommi Kaartinen and Sarita Ahoranta and Lakaniemi, {Aino Maija} and P{\"a}ivi Kinnunen",

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Bomberg, M , Miettinen, H, Wahlström, M, Kaartinen, T, Ahoranta, S, Lakaniemi, AM & Kinnunen, P 2017, Evaluation of Long-Term Post Process Inactivation of Bioleaching Microorganisms. in S Hedrich, K Rübberdt, F Glombitza, W Sand, A Schippers, MV Véliz & S Willscher (eds), 22nd International Biohydrometallurgy Symposium. Solid State Phenomena, vol. 262, pp. 57-60. https://doi.org/10.4028/www.scientific.net/SSP.262.57

Evaluation of Long-Term Post Process Inactivation of Bioleaching Microorganisms. / Bomberg, Malin ; Miettinen, Hanna; Wahlström, Margareta et al.
22nd International Biohydrometallurgy Symposium. ed. / Sabrina Hedrich; Kathrin Rübberdt; Franz Glombitza; Wolfgang Sand; Axel Schippers; Mario Vera Véliz; Sabine Willscher. 2017. p. 57-60 (Solid State Phenomena, Vol. 262).

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Evaluation of Long-Term Post Process Inactivation of Bioleaching Microorganisms

AU - Bomberg, Malin

AU - Miettinen, Hanna

AU - Wahlström, Margareta

AU - Kaartinen, Tommi

AU - Ahoranta, Sarita

AU - Lakaniemi, Aino Maija

AU - Kinnunen, Päivi

PY - 2017/1/1

Y1 - 2017/1/1

N2 - The H2020 BioMOre project (www.biomore.info, Grant Agreement #642456) tests the feasibility of in-situ bioleaching of copper in deep subsurface deposits in the Rudna Mine, Poland. Copper is leached using biologically produced ferric iron solution, which is recycled back to the in-situ reactor after re-oxidation by iron-oxidizing bacteria (IOB). From a post operational point of view, it is important that the biological processes applied during the operation can be controlled and terminated. Our goal was to determine the possibility to use natural saline mine water for the inactivation of introduced IOB remaining in the in-situ reactor after completion of the leaching process of the Kupferschiefer ore. Aerobic and anaerobic microcosms containing acid-leached (pH 2) sandstone or black shale from the Kupferschiefer in the Rudna mine were further leached with the effluent from an iron-oxidizing bioreactor, at a temperature of 30°C, for 10 days, to simulate in-situ leaching. After the removal of the iron solution, residing IOB were inactivated by filling the microcosms with saline water (65 g L -1 Cl -) originating from the mine. The saline water completely inactivated the IOB and the naturally occurring saline water of the mine can be used for long-term post process inactivation of bioleaching microorganisms.

AB - The H2020 BioMOre project (www.biomore.info, Grant Agreement #642456) tests the feasibility of in-situ bioleaching of copper in deep subsurface deposits in the Rudna Mine, Poland. Copper is leached using biologically produced ferric iron solution, which is recycled back to the in-situ reactor after re-oxidation by iron-oxidizing bacteria (IOB). From a post operational point of view, it is important that the biological processes applied during the operation can be controlled and terminated. Our goal was to determine the possibility to use natural saline mine water for the inactivation of introduced IOB remaining in the in-situ reactor after completion of the leaching process of the Kupferschiefer ore. Aerobic and anaerobic microcosms containing acid-leached (pH 2) sandstone or black shale from the Kupferschiefer in the Rudna mine were further leached with the effluent from an iron-oxidizing bioreactor, at a temperature of 30°C, for 10 days, to simulate in-situ leaching. After the removal of the iron solution, residing IOB were inactivated by filling the microcosms with saline water (65 g L -1 Cl -) originating from the mine. The saline water completely inactivated the IOB and the naturally occurring saline water of the mine can be used for long-term post process inactivation of bioleaching microorganisms.

KW - In situ bioleaching

KW - inactivation

KW - iron-oxidizing bacteria

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M3 - Conference article in proceedings

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T3 - Solid State Phenomena

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BT - 22nd International Biohydrometallurgy Symposium

A2 - Hedrich, Sabrina

A2 - Rübberdt, Kathrin

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A2 - Sand, Wolfgang

A2 - Schippers, Axel

A2 - Véliz, Mario Vera

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ER -

Bomberg M , Miettinen H, Wahlström M, Kaartinen T, Ahoranta S, Lakaniemi AM et al. Evaluation of Long-Term Post Process Inactivation of Bioleaching Microorganisms. In Hedrich S, Rübberdt K, Glombitza F, Sand W, Schippers A, Véliz MV, Willscher S, editors, 22nd International Biohydrometallurgy Symposium. 2017. p. 57-60. (Solid State Phenomena, Vol. 262). doi: 10.4028/www.scientific.net/SSP.262.57

Evaluation of Long-Term Post Process Inactivation of Bioleaching Microorganisms

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