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Título del libro: Microbial Biotechnology: Role In Ecological Sustainability And Research
Título del capítulo: The potential of sulfate-reducing microorganisms for the bioconversion of dissolved sulfates to sulfides precipitating metals of a mine liquid effluent

Autores UNAM:
MARISELA BERNAL GONZALEZ; ANGEL ENRIQUE CHAVEZ CASTELLANOS; ENRIQUE RODOLFO BAZUA RUEDA;
Autores externos:

Idioma:

Año de publicación:
2022
Palabras clave:

Mining industry; Sulfate ions; Sulfate-reducing microorganisms; Sulfide ions; Thermodynamic modeling


Resumen:

Sulfate-reducing microorganisms (SRM) may transform dissolved metal ions through a biological process. The mining industry, especially when it possesses aqueous effluents with a high concentration of sulfates and some dissolved metals, is an ad hoc environment for the use of SRM to promote the recycling of these liquid effluents once these ions are removed. A thermodynamic analysis can indicate if the process is making efficient use of energy in order to reach suitable operating conditions for these microorganisms' conversion. This laboratory-scale experimental research used an upflow anaerobic sludge bed reactor, where SRMcarried out the bioconversion of sulfates into sulfides precipitating dissolved metals. These reactions were simulated with a theoretical model that provided the thermodynamic tools necessary for analysis to elucidate options that might improve the efficiency of the process in energy terms from 5.34%, that is the actual operational value, up to 41%. These simulations will be the basis for continuing the experimental procedure in order to corroborate these theoretical results. © 2023 John Wiley & Sons, Inc.


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