Modeling the auto-thermal performance of a thermophilic chalcopyrite bioleaching heap employing mesophilic and thermophilic microbes

Javier Vilcaez, Koichi Suto, Chihiro Inoue

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

A model was prepared to study the performance of a thermophilic bioleaching heap that employs mixed mesophilic and thermophilic microbes for copper extraction from CuFeS2. Mesophiles' preference for and ease of dissolving additional FeS2 provided to the heap enables the transition from a mesophilic to a thermophilic bioleaching state without the necessity of additional energy supply. In this sense, the mathematical description of the bioleaching process is done taking into consideration the dependency of both microbes' biological states on physicochemical factors such as the temperature and O2 availability. With regard to the flow rates of the liquid and air phases, simulation results have shown that these flow rates govern not just the heat transfer and variation of cell distribution, but also the leaching rate regardless of the fraction of CuFeS2 per FeS2 leached (FCP) which is the other variable influencing to the heat accumulation in the heap.

Original languageEnglish
Title of host publicationBiohydrometallurgy
Subtitle of host publicationFrom the Single Cell to the Environment
PublisherTrans Tech Publications
Pages70-74
Number of pages5
ISBN (Print)0878494529, 9780878494521
DOIs
Publication statusPublished - 2007
Event17th International Biohydrometallurgy Symposium, IBS 2007 - Frankfurt am Main, Germany
Duration: 2007 Sep 22007 Sep 5

Publication series

NameAdvanced Materials Research
Volume20-21
ISSN (Print)1022-6680

Other

Other17th International Biohydrometallurgy Symposium, IBS 2007
CountryGermany
CityFrankfurt am Main
Period07/9/207/9/5

Keywords

  • Bioleaching
  • Chalcopyrite
  • Mesophiles
  • Thermophiles

ASJC Scopus subject areas

  • Engineering(all)

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