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1 Journal of Ecological Engineering

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Copper Extraction from Complex Waste Dumps by Biochemical Leaching Method

Koizhanova Aigul, Magomedov David, Abdyldayev Nurgali, Kamalov Emil, Yerdenova Maria, Bakrayeva Akbota

Journal of Ecological Engineering

2022

Vol. 23, nr 10

283--290

The article presents the research results for the effectiveness of copper extraction from ores of the Satpayev deposit with complex, mixed composition bacterial leaching. The experiments with pre-acidification of copper samples were performed using biological oxidation by A. Ferrooxidans bacterial culture, adapted strain. Biochemical opening moes of mineral raw materials using A. Ferrooxidans bacteria of a particular strain adapted to the copper waste composition and capable of oxidizing sulfide and iron-bearing minerals were worked out. The optimal growth conditions for microorganisms in copper mineral pulp medium were established (temperature, pH, S: L.) The highest leaching efficiency, up to 88.65%, was observed in the experiments with preliminary bio-oxidation of samples by A. Ferrooxidans bacterial culture.