Adaptation of bacteria for use in leaching

Details Adaptation of bacteria for use in leaching Adaptation of bacteria for use in leaching

C - Chemistry, Metallurgy

12

N

C12N 1/00 (2006.01) B09C 1/10 (2006.01) C12N 1/20 (2006.01) C12N 1/24 (2006.01) C12N 1/36 (2006.01) C22B 3/18 (2006.01)

Patent

CA 2454678

A method for the adaptation of bacteria for use in the leaching of ores and concentrates, the method characterised by the steps of : a) Obtaining samples of bacteria exhibiting one or more desired attributes; b) Combining bacterial samples from step a) with a stock bacterial culture known to have the ability to oxidise sulphide minerals, whereby the resulting combined bacterial culture ultimately expresses both the one or more desired attributes and the ability to oxidise sulphide minerals. The particular desired attribute is preferably salt tolerance.

L'invention concerne une méthode d'adaptation de bactéries destinées à être utilisées dans un procédé de lixiviation de minerais ou de concentrés. La méthode consiste à: a) obtenir des échantillons de bactéries présentant un ou plusieurs attributs désirés; b) combiner les échantillons de bactéries de l'étape a) avec une culture bactérienne souche réputée avoir la capacité d'oxyder des minéraux sulfurés. La culture bactérienne combinée résultante exprime au final lesdits attributs désirés et la capacité d'oxyder des minéraux sulfurés. Un tel attribut désiré est, de préférence, la tolérance au sel.

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