Evaluación de la capacidad de Sporosarcina pasteurii para la precipitación inducida microbiológicamente como tratamiento de relaves mineros

Abstract

Abstract: This research work was carried out in the soil and bioprocess laboratories of the Private Technical University of Loja in order to apply a stabilization treatment in tailings samples that were obtained Empresa Minera Lunding Gold S.A. Where is used a biological stabilization treatment, which allowed the bacteria to precipitate calcium carbonate in crystal forms that act as a binder to bind the tailings particles. Remolded specimens were made considering the density and the company's standards. Minera Lunding Gold S.A. The application of the bacteria was carried out by two methods. In the irrigation method (M1), the bacteria and the solution were applied to the already formed test tube. cementitious and, in the mixing phase (M2), the components were grouped. For both methods, The bacteria was inoculated twice (24 hours later) in each tailings test tube. Added 15 ml of the cementing substance (1N calcium chloride), for 5 days every 8 hours. Subsequently, the resistance and efficiency of the process in the specimens was analyzed using geomechanical analyzes and physical-chemical parameters of the tailings. Finally, the results obtained show the maximum tension that the tailings sample under a uniaxial force. With the treatment applied, sample M1 indicated the improvement of 94.5% and in M2 of 337.5%. Better soil sample results obtained by the mixed method (M2)