Abhilash, and Pandey, B D and Singh, A K (2013) Comparative Performance of Uranium Bioleaching from Low Grade Indian Apatite Rock in Column and Bioreactor. Energy Procedia, 39 . pp. 20-32.
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Uranium ore from the Narwapahar mines, Jharkhand, India (∼0.047% U3O8), rich in apatite content (5%) was investigated for bio-processing in lab-scale columns and bioreactor. With a load of 2.0 kg ore in column at pH 1.7 using A. ferrooxidans and L. ferrooxidans, uranium recovery of 57% and 66% was achieved, respectively in 40 days in comparison to 39% in chemical leaching. Bio-leaching studies with the Narwapahar ore carried out in a 2L bioreactor at 10% (w/v) pulp density at pH 2.0, rpm 150 and 35oC yielded 57% and 63% uranium recovery by 10% (v/v) enriched culture of A. ferrooxidans and L. ferrooxidans, respectively in 5 days. In another set of experiments, biogenic ferric sulfate generated in the bioreactor was mixed with the ore slurry and 90.3% uranium biorecovery was achieved in 10 h at pH 2.0, 20% (w/v) pulp density of <45 μm particles and 40oC with L. ferrooxidans as against 87% leaching at 35oC with A. ferrooxidans.
|Uncontrolled Keywords:||low-grade uranium ore; bioleaching; A.ferrooxidans; L.ferrooxidans; percolation leaching; bioreactor|
|Divisions:||Metal Extraction and Forming|
|Deposited By:||Dr. Abhilash .|
|Deposited On:||03 Oct 2013 16:16|
|Last Modified:||03 Oct 2013 16:16|
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