Biolixiviación en tanque de un concentrado de cobre utilizando los microorganismos moderadamente termofílicos Sulfobacillus thermosulfidoxidans KMM3 y Sulfobacillus acidophilus KMM26

Zahra Manafi; Mohammad Kargar; Farshid Kafilzadeh

doi:10.3989/revmetalm.207

Autores/as

Zahra Manafi Department of Microbiology, Jahrom Branch, Islamic Azad University, Jahrom https://orcid.org/0000-0002-6217-0975
Mohammad Kargar Department of Microbiology, Jahrom Branch, Islamic Azad University, Jahrom https://orcid.org/0000-0002-9531-3645
Farshid Kafilzadeh Department of Microbiology, Jahrom Branch, Islamic Azad University, Jahrom https://orcid.org/0000-0003-2506-7140

DOI:

https://doi.org/10.3989/revmetalm.207

Palabras clave:

Biolixiviación, Biorreactor, Concentrado de cobre, Termófilos moderados

Resumen

Se ha investigado, a escala de laboratorio, el proceso de biolixiviación de un concentrado de cobre utilizando microorganismos termófilos moderados como una alternativa al proceso de fundición convencional; asimismo se han evaluado las condiciones experimentales óptimas para la extracción de cobre en términos de densidad de pulpa, pH y tamaño de partículas del concentrado cuprífero. La experimentación se llevó a cabo en un biorreactor de 5 l de capacidad. Y utilizando dos especies de Sulfobacillus. Los resultados mostraron que, después de 12 días, más del 80% del cobre se puede extraer del concentrado de calcopirita. Las condiciones óptimas para la extracción del metal fueron: una densidad de pulpa del 5% (p/v), un pH inicial de 1 y un tamaño de partícula (d80) de 45 µm. Los resultados de esta investigación contribuirán al diseño, por parte de la Compañía Iranian Babak Copper (IBCCO), de una planta industrial de biolixiviación en tanques de una capacidad anual de 50.000 t de cátodo de cobre.

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Citas

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