Proceso para el control in situ de la contaminación de aguas subterráneas por infiltración de aguas de tranques de relave

The invention discloses an in-situ method for reducing hydraulic conductivity and generating the precipitation of insoluble minerals in an underground aquifer which is affected by seepage of surface water or by seepage of water from a mining tailings tank, comprising at least the following steps: (a) providing a sulphate-reducing bacteria-enriched microbial culture adapted to the underground water of the aquifer to be treated, (b) injecting an enriched microbial culture into the underground aquifer, (c) injecting an electron and nutrient donor for reducing bacteria-enriched microbal culture and one or more metal cations that favour the precipitation of insoluble minerals, and (d) allowing the microorganims to multiply and colonise the solid material of the underground aquifer, reducing the hydraulic permeability of the underground aquifer and causing the precipitation of insoluble minerals in the solid material of the underground aquifer.