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首页> 外文会议>International Conference on Waste Management and Technology >Feasibility of Bioaugmentation with Iron/sulfur Oxidizing Acidophiles to Enhance Copper Bioleaching from A Flotation Copper Ore
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Feasibility of Bioaugmentation with Iron/sulfur Oxidizing Acidophiles to Enhance Copper Bioleaching from A Flotation Copper Ore

机译：用氧化铁/硫氧化嗜酸铜的生物沉积可行性，以增强浮选铜矿铜的铜

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The feasibility of one strategy of bioaugmentation was assessed to enhance copper extraction from chalcopyrite. Bioaugmentation consisted of the re-addition of one iron/sulfur oxidizing acidophile (Acidithiobacillus caldus, Ferroplasma thermophilum or Leptospirillum ferriphilum) into the early stage (on the 5th day) of the bioleaching system. The strain selection and inoculum concentration of bioaugmentation were separately investigated by comparing changes in the bioleaching performance and leached solid residues. Results indicated that bioaugmentation with three augmented strains synergistically promoted the total microbial growth and increased the cell numbers, and then accelerated the iron/sulfur oxidation, thereby catalytically regenerated the copper leaching agents of Fe~(3+) and H~+ compared to the unamended control. Finally, an enhancement in copper extraction was detected and moreover positively correlated with the introducing cell numbers. Particularly, re-addition of L. ferriphilum on the 5th day showed the best improvement in copper leaching, which remarkably shortened the incubation time (12 days) of almost full copper extraction while only 85.8% of copper was leached after 24 days in the control. Therefore, bioaugmentation could be a useful bio-remedy to improve the bioleaching kinetics and level of copper ore.
机译：评估了一种生物沉积策略的可行性，以增强铜汽油沸石的铜萃取。生物沉积由重新加入一种铁/硫氧化嗜酸乳钳（酸性硫虫，铁玻璃嗜热或百分之叶螺旋状蓟马）进入生物浸出系统的早期（第5天）。通过比较生物浸出性能和浸出的固体残基的变化，分别研究了生物沉积化的应变选择和接种浓度。结果表明，三个增强菌株的生物沉积协同促进了总微生物生长并增加了细胞数，然后加速了铁/硫氧化，从而催化再生Fe〜（3+）和H〜+的铜浸出剂。未加工的控制。最后，检测到铜提取的增强，而且与引入细胞数呈正相关。特别地，第5天的R.Ferriphilum重新加入铜浸出的最佳改善，这显着缩短了几乎全铜提取的孵育时间（12天），而在对照中仅在24天后浸出85.8％的铜。因此，生物沉积可能是一种有用的生物补救措施，以改善生物浸入动力学和铜矿水平。

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