The invention discloses a method for rapidly oxidizing Fe<2+> in an acid process in-situ leaching
uranium mining solution by psychrotolerant and
acidophilic bacteria at a low temperature. The method is characterized in that psychrotolerant and acidophilic thiobacilli are adopted as an
oxidizing agent, a biological ceramsite with high
acid resistance and specific surface area is adopted as a film hanging carrier of the thiobacilli, and a
moving bed bioreactor is adopted for immobilization culture of the
bacteria, thereby achieving the purpose of rapidly and continuously oxidizing Fe<2+> in adsorption
tail liquid. The method specifically comprises the operation steps of activation of the psychrotolerant and acidophilic bacterium solution, carrier pretreatment, film hanging, rapid and continuous oxidation and adsorption of Fe<2+>+ in the adsorption
tail liquid, and regeneration of ceramsite carriers. The bred psychrotolerant and
acidophilic bacteria can still keep oxidization activity ofthe
bacteria at a low temperature environment of 5-20 DEG C, and rapidly oxidize
ferrous ions. By adopting the adsorption
tail liquid as a nutritional ingredient for the
bacteria, a culture medium isadopted as a bacterium
nutrient substance simply during biological ceramsite film hanging, and any
nutrient substance is added in a normal running period, so that the production cost is reduced.